REPL: Add clear-screen / auto-complete / basic hints and syntax highlighting (#316)

* swap to replxx from linenoise

* repl: Implement form auto-tab-completion

* repl: color coordinate the prompts

* repl: Add some basic syntax highlighting, bracket pairs and forms (all one color)

* repl: A more consistent starting screen for the repl

* repl: bug fix for auto-complete

* debug linux

* linting

CMakeLists.txt

@@ -1,6 +1,8 @@
 # Top Level CMakeLists.txt
 cmake_minimum_required(VERSION 3.10)
 
+set(CMAKE_POSITION_INDEPENDENT_CODE ON)
+
 project(jak)
 include(CTest)
 if(NOT CMAKE_BUILD_TYPE)
@@ -61,6 +63,9 @@ include_directories(./)
 
 include_directories(SYSTEM third-party/inja)
 
+# build repl library
+add_subdirectory(third-party/replxx EXCLUDE_FROM_ALL)
+
 # build common library
 add_subdirectory(common)
 

README.md

@@ -212,7 +212,7 @@ The final component is the "runtime", located in `game`. This is the part of the
   - `run-clang-tidy`
   - `zydis`: x86-64 disassembler used in the OpenGOAL debugger
   - `json`: A JSON library
-  - `linenoise`: Used for the REPL input. Support history and useful editing shortcuts.
+  - `replxx`: Used for the REPL input. Support history and useful editing shortcuts.
   - `svpng`: Save a PNG file
 
 

common/CMakeLists.txt

@@ -8,7 +8,7 @@ add_library(common
         goos/PrettyPrinter.cpp
         goos/Reader.cpp
         goos/TextDB.cpp
-        goos/ReplHistory.cpp
+        goos/ReplUtils.cpp
         log/log.cpp
         type_system/deftype.cpp
         type_system/Type.cpp
@@ -22,7 +22,7 @@ add_library(common
         util/Timer.cpp
         )
 
-target_link_libraries(common fmt lzokay)
+target_link_libraries(common fmt lzokay replxx)
 
 if(WIN32)
     target_link_libraries(common wsock32 ws2_32)

common/goos/Interpreter.cpp

@@ -125,11 +125,11 @@ Object Interpreter::intern(const std::string& name) {
 /*!
  * Display the REPL, which will run until the user executes exit.
  */
-void Interpreter::execute_repl() {
+void Interpreter::execute_repl(ReplWrapper& repl) {
   while (!want_exit) {
     try {
       // read something from the user
-      Object obj = reader.read_from_stdin("goos");
+      Object obj = reader.read_from_stdin("goos", repl);
       // evaluate
       Object evald = eval_with_rewind(obj, global_environment.as_env());
       // print

common/goos/Interpreter.h

@@ -15,7 +15,7 @@ class Interpreter {
  public:
   Interpreter();
   ~Interpreter();
-  void execute_repl();
+  void execute_repl(ReplWrapper& repl);
   void throw_eval_error(const Object& o, const std::string& err);
   Object eval_with_rewind(const Object& obj, const std::shared_ptr<EnvironmentObject>& env);
   bool get_global_variable_by_name(const std::string& name, Object* dest);

common/goos/Reader.cpp

@@ -13,7 +13,7 @@
 #include "common/util/FileUtil.h"
 #include "third-party/fmt/core.h"
 #include <filesystem>
-#include "ReplHistory.h"
+#include "ReplUtils.h"
 
 namespace goos {
 
@@ -103,9 +103,6 @@ void TextStream::seek_past_whitespace_and_comments() {
 }
 
 Reader::Reader() {
-  // third-party library used for a fancy line in
-  ReplHistory::repl_set_history_max_size(5000);
-
   // add default macros
   add_reader_macro("'", "quote");
   add_reader_macro("`", "quasiquote");
@@ -139,12 +136,11 @@ Reader::Reader() {
 /*!
  * Prompt the user and read the result.
  */
-Object Reader::read_from_stdin(const std::string& prompt_name) {
-  std::string line;
+Object Reader::read_from_stdin(const std::string& prompt, ReplWrapper& repl) {
   // escape code will make sure that we remove any color
-  std::string prompt_full = "\033[0m" + prompt_name + "> ";
-  ReplHistory::repl_readline(prompt_full.c_str(), line);
-  ReplHistory::repl_add_to_history(line.c_str());
+  std::string prompt_full = "\033[0m" + prompt;
+  std::string line = repl.readline(prompt_full);
+  repl.add_to_history(line.c_str());
   // todo, decide if we should keep reading or not.
 
   // create text fragment and add to the DB

common/goos/Reader.h

@@ -19,6 +19,8 @@
 #include "common/goos/Object.h"
 #include "common/goos/TextDB.h"
 
+#include "ReplUtils.h"
+
 namespace goos {
 
 /*!
@@ -68,7 +70,7 @@ class Reader {
  public:
   Reader();
   Object read_from_string(const std::string& str, bool add_top_level = true);
-  Object read_from_stdin(const std::string& prompt_name);
+  Object read_from_stdin(const std::string& prompt, ReplWrapper& repl);
   Object read_from_file(const std::vector<std::string>& file_path);
 
   std::string get_source_dir();

common/goos/ReplHistory.cpp

@@ -1,38 +0,0 @@
-#include "ReplHistory.h"
-
-#include "common/util/FileUtil.h"
-#include "third-party/linenoise.h"
-
-bool ReplHistory::repl_set_history_max_size(size_t len) {
-  return linenoise::SetHistoryMaxLen(len);
-}
-
-bool ReplHistory::repl_readline(const char* prompt, std::string& line) {
-  return linenoise::Readline(prompt, line);
-}
-
-bool ReplHistory::repl_add_to_history(const char* line) {
-  return linenoise::AddHistory(line);
-}
-
-bool ReplHistory::repl_save_history() {
-  // NOTE - library doesn't seem unicode safe on windows
-  std::filesystem::path path = file_util::get_user_home_dir();
-  if (std::filesystem::exists(path)) {
-    return linenoise::SaveHistory((path / ".opengoal.repl.history").string().c_str());
-  }
-  return false;
-}
-
-bool ReplHistory::repl_load_history() {
-  // NOTE - library doesn't seem unicode safe on windows
-  std::filesystem::path path = file_util::get_user_home_dir();
-  if (std::filesystem::exists(path)) {
-    return linenoise::LoadHistory((path / ".opengoal.repl.history").string().c_str());
-  }
-  return false;
-}
-
-const std::vector<std::string>& ReplHistory::repl_get_history() {
-  return linenoise::GetHistory();
-}

common/goos/ReplHistory.h

@@ -1,16 +0,0 @@
-#pragma once
-
-#include <string>
-#include <vector>
-
-// Linenoise declares history as a static array, so when trying to use the
-// library across files, the history array is different
-// Solve this by wrapping the API
-namespace ReplHistory {
-bool repl_set_history_max_size(size_t len);
-bool repl_readline(const char* prompt, std::string& line);
-bool repl_add_to_history(const char* line);
-bool repl_save_history();
-bool repl_load_history();
-const std::vector<std::string>& repl_get_history();
-};  // namespace ReplHistory

common/goos/ReplUtils.cpp

@@ -0,0 +1,138 @@
+#include "ReplUtils.h"
+
+#include "common/util/FileUtil.h"
+#include "third-party/replxx/include/replxx.hxx"
+#include "common/versions.h"
+#include "third-party/fmt/color.h"
+#include "third-party/fmt/core.h"
+
+// TODO - expand a list of hints (ie. a hint for defun to show at a glance how to write a function,
+// or perhaps, show the docstring for the current function being used?)
+
+using Replxx = replxx::Replxx;
+
+void ReplWrapper::clear_screen() {
+  repl.clear_screen();
+}
+
+void ReplWrapper::print_welcome_message() {
+  clear_screen();
+  // Welcome message / brief intro for documentation
+  std::string ascii;
+  ascii += " _____             _____ _____ _____ __    \n";
+  ascii += "|     |___ ___ ___|   __|     |  _  |  |   \n";
+  ascii += "|  |  | . | -_|   |  |  |  |  |     |  |__ \n";
+  ascii += "|_____|  _|___|_|_|_____|_____|__|__|_____|\n";
+  ascii += "      |_|                                  \n";
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::orange), ascii);
+
+  fmt::print("Welcome to OpenGOAL {}.{}!\n", versions::GOAL_VERSION_MAJOR,
+             versions::GOAL_VERSION_MINOR);
+  fmt::print("Run ");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(repl-help)");
+  fmt::print(" for help with common commands and REPL usage.\n");
+  fmt::print("Run ");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(lt)");
+  fmt::print(" to connect to the local target.\n\n");
+}
+
+void ReplWrapper::set_history_max_size(size_t len) {
+  repl.set_max_history_size(len);
+}
+
+const char* ReplWrapper::readline(const std::string& prompt) {
+  return repl.input(prompt);
+}
+
+void ReplWrapper::add_to_history(const std::string& line) {
+  repl.history_add(line);
+}
+
+void ReplWrapper::save_history() {
+  // NOTE - library doesn't seem unicode safe on windows
+  std::filesystem::path path = file_util::get_user_home_dir();
+  if (std::filesystem::exists(path)) {
+    repl.history_save((path / ".opengoal.repl.history").string());
+  }
+}
+
+void ReplWrapper::load_history() {
+  // NOTE - library doesn't seem unicode safe on windows
+  std::filesystem::path path = file_util::get_user_home_dir();
+  if (std::filesystem::exists(path)) {
+    repl.history_load((path / ".opengoal.repl.history").string());
+  }
+}
+
+std::pair<std::string, bool> ReplWrapper::get_current_repl_token(std::string const& context) {
+  // Find the current token
+  std::string token = "";
+  for (auto c = context.crbegin(); c != context.crend(); c++) {
+    if (std::isspace(*c)) {
+      break;
+    } else {
+      token = *c + token;
+    }
+  }
+
+  // If there is a preceeding '(' remove it
+  if (!token.empty() && token.at(0) == '(') {
+    token.erase(0, 1);
+    return {token, true};
+  }
+  return {token, false};
+}
+
+void ReplWrapper::print_help_message() {
+  fmt::print(fmt::emphasis::bold, "\nREPL Controls:\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(:clear)\n");
+  fmt::print(" - Clear the current screen\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(e)\n");
+  fmt::print(" - Exit the compiler once the current REPL command is finished\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(lt [ip-address] [port-number])\n");
+  fmt::print(
+      " - Connect the listener to a running target. The IP address defaults to `127.0.0.1` and the "
+      "port to `8112`\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(r [ip-address] [port-number])\n");
+  fmt::print(
+      " - Attempt to reset the target and reconnect. After this, the target will have nothing "
+      "loaded.\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(:status)\n");
+  fmt::print(" - Send a ping-like message to the target. Requires the target to be connected\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(shutdown-target)\n");
+  fmt::print(" - If the target is connected, make it exit\n");
+
+  fmt::print(fmt::emphasis::bold, "\nCompiling & Building:\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(m \"filename\")\n");
+  fmt::print(" - Compile an OpenGOAL source file\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(ml \"filename\")\n");
+  fmt::print(" - Compile and Load an OpenGOAL source file\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(build-game)\n");
+  fmt::print(" - Loads and builds all game files and rebuilds DGOs\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(build-kernel)\n");
+  fmt::print(" - Similar to (build-game) but only the kernel files\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(blg)\n");
+  fmt::print(" - Performs a (build-game) and then loads all CGOs\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green),
+             "(build-dgos \"path/to/dgos/description/file\")\n");
+  fmt::print(
+      " - Builds all the DGO files described in the DGO description file. See "
+      "`goal_src/builds/dgos.txt` for an example.\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green),
+             "(asm-data-file tool-name \"file-name\")\n");
+  fmt::print(
+      " - Build a data file. The `tool-name` refers to which data building tool should be used.\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::lime_green), "(build-data)\n");
+  fmt::print(" - Macro for rebuilding all data files\n");
+
+  fmt::print(fmt::emphasis::bold, "\nOther:\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::magenta), "(gs)\n");
+  fmt::print(" - Enter a GOOS REPL\n");
+  fmt::print(fmt::emphasis::bold | fg(fmt::color::magenta),
+             "(set-config! config-name config-value)\n");
+  fmt::print(" - Used to set compiler configuration\n");
+}
+
+void ReplWrapper::init_default_settings() {
+  repl.set_word_break_characters(" \t");
+}

common/goos/ReplUtils.h

@@ -0,0 +1,33 @@
+#pragma once
+
+#include <functional>
+#include <string>
+#include <vector>
+
+#include "third-party/replxx/include/replxx.hxx"
+
+using Replxx = replxx::Replxx;
+
+class ReplWrapper {
+  Replxx repl;
+
+ public:
+  ReplWrapper() {}
+  Replxx& get_repl() { return repl; }
+  void init_default_settings();
+
+  // Functionality / Commands
+  void clear_screen();
+  void print_welcome_message();
+  void set_history_max_size(size_t len);
+  const char* readline(const std::string& prompt);
+  void add_to_history(const std::string& line);
+  void save_history();
+  void load_history();
+  void print_help_message();
+  std::pair<std::string, bool> get_current_repl_token(std::string const& context);
+
+  std::vector<std::string> examples{};
+  using cl = Replxx::Color;
+  std::vector<std::pair<std::string, cl>> regex_colors{};
+};

goalc/compiler/Compiler.cpp

@@ -9,7 +9,8 @@
 
 using namespace goos;
 
-Compiler::Compiler() : m_debugger(&m_listener) {
+Compiler::Compiler(std::unique_ptr<ReplWrapper> repl)
+    : m_debugger(&m_listener), m_repl(std::move(repl)) {
   m_listener.add_debugger(&m_debugger);
   m_ts.add_builtin_types();
   m_global_env = std::make_unique<GlobalEnv>();
@@ -26,25 +27,33 @@ Compiler::Compiler() : m_debugger(&m_listener) {
 }
 
 ReplStatus Compiler::execute_repl() {
+  // init repl
+  m_repl.get()->print_welcome_message();
+  auto examples = m_repl.get()->examples;
+  auto regex_colors = m_repl.get()->regex_colors;
+  m_repl.get()->init_default_settings();
+  using namespace std::placeholders;
+  m_repl.get()->get_repl().set_completion_callback(
+      std::bind(&Compiler::find_symbols_by_prefix, this, _1, _2, std::cref(examples)));
+  m_repl.get()->get_repl().set_hint_callback(
+      std::bind(&Compiler::find_hints_by_prefix, this, _1, _2, _3, std::cref(examples)));
+  m_repl.get()->get_repl().set_highlighter_callback(
+      std::bind(&Compiler::repl_coloring, this, _1, _2, std::cref(regex_colors)));
+
   while (!m_want_exit && !m_want_reload) {
     try {
       // 1). get a line from the user (READ)
-      std::string prompt = "g";
+      std::string prompt = fmt::format(fmt::emphasis::bold | fg(fmt::color::cyan), "g > ");
       if (m_listener.is_connected()) {
-        prompt += "c";
-      } else {
-        prompt += " ";
+        prompt = fmt::format(fmt::emphasis::bold | fg(fmt::color::lime_green), "gc> ");
       }
-
       if (m_debugger.is_halted()) {
-        prompt += "s";
+        prompt = fmt::format(fmt::emphasis::bold | fg(fmt::color::magenta), "gs> ");
       } else if (m_debugger.is_attached()) {
-        prompt += "r";
-      } else {
-        prompt += " ";
+        prompt = fmt::format(fmt::emphasis::bold | fg(fmt::color::red), "gr> ");
       }
 
-      Object code = m_goos.reader.read_from_stdin(prompt);
+      Object code = m_goos.reader.read_from_stdin(prompt, *m_repl.get());
 
       // 2). compile
       auto obj_file = compile_object_file("repl", code, m_listener.is_connected());
@@ -365,4 +374,4 @@ void Compiler::typecheck_reg_type_allow_false(const goos::Object& form,
     }
   }
   typecheck(form, expected, coerce_to_reg_type(actual->type()), error_message);
-}
+}

goalc/compiler/Compiler.h

@@ -18,6 +18,7 @@
 #include "CompilerException.h"
 #include "goalc/compiler/SymbolInfo.h"
 #include "Enum.h"
+#include "common/goos/ReplUtils.h"
 
 enum MathMode { MATH_INT, MATH_BINT, MATH_FLOAT, MATH_INVALID };
 
@@ -25,7 +26,7 @@ enum class ReplStatus { OK, WANT_EXIT, WANT_RELOAD };
 
 class Compiler {
  public:
-  Compiler();
+  Compiler(std::unique_ptr<ReplWrapper> repl = nullptr);
   ReplStatus execute_repl();
   goos::Interpreter& get_goos() { return m_goos; }
   FileEnv* compile_object_file(const std::string& name, goos::Object code, bool allow_emit);
@@ -48,6 +49,16 @@ class Compiler {
   listener::Listener& listener() { return m_listener; }
   void poke_target() { m_listener.send_poke(); }
   bool connect_to_target();
+  Replxx::completions_t find_symbols_by_prefix(std::string const& context,
+                                               int& contextLen,
+                                               std::vector<std::string> const& user_data);
+  Replxx::hints_t find_hints_by_prefix(std::string const& context,
+                                       int& contextLen,
+                                       Replxx::Color& color,
+                                       std::vector<std::string> const& user_data);
+  void repl_coloring(std::string const& str,
+                     Replxx::colors_t& colors,
+                     std::vector<std::pair<std::string, Replxx::Color>> const& user_data);
 
  private:
   bool get_true_or_false(const goos::Object& form, const goos::Object& boolean);
@@ -203,6 +214,7 @@ class Compiler {
   CompilerSettings m_settings;
   bool m_throw_on_define_extern_redefinition = false;
   SymbolInfoMap m_symbol_info;
+  std::unique_ptr<ReplWrapper> m_repl;
 
   MathMode get_math_mode(const TypeSpec& ts);
   bool is_number(const TypeSpec& ts);
@@ -424,6 +436,7 @@ class Compiler {
   Val* compile_seval(const goos::Object& form, const goos::Object& rest, Env* env);
   Val* compile_exit(const goos::Object& form, const goos::Object& rest, Env* env);
   Val* compile_asm_file(const goos::Object& form, const goos::Object& rest, Env* env);
+  Val* compile_repl_clear_screen(const goos::Object& form, const goos::Object& rest, Env* env);
   Val* compile_asm_data_file(const goos::Object& form, const goos::Object& rest, Env* env);
   Val* compile_repl_help(const goos::Object& form, const goos::Object& rest, Env* env);
   Val* compile_listen_to_target(const goos::Object& form, const goos::Object& rest, Env* env);

goalc/compiler/compilation/Atoms.cpp

@@ -107,6 +107,7 @@ const std::unordered_map<
 
         // COMPILER CONTROL
         {"repl-help", &Compiler::compile_repl_help},
+        {":clear", &Compiler::compile_repl_clear_screen},
         {"gs", &Compiler::compile_gs},
         {":exit", &Compiler::compile_exit},
         {"asm-file", &Compiler::compile_asm_file},

goalc/compiler/compilation/CompilerControl.cpp

@@ -11,7 +11,9 @@
 #include "common/util/FileUtil.h"
 #include "goalc/data_compiler/game_text.h"
 #include "goalc/data_compiler/game_count.h"
-#include "common/goos/ReplHistory.h"
+#include "common/goos/ReplUtils.h"
+#include <regex>
+#include <stack>
 
 /*!
  * Exit the compiler. Disconnects the listener and tells the target to reset itself.
@@ -31,7 +33,7 @@ Val* Compiler::compile_exit(const goos::Object& form, const goos::Object& rest,
   }
   // flag for the REPL.
   m_want_exit = true;
-  ReplHistory::repl_save_history();
+  m_repl->save_history();
   return get_none();
 }
 
@@ -198,52 +200,7 @@ Val* Compiler::compile_asm_file(const goos::Object& form, const goos::Object& re
  * Simple help / documentation command
  */
 Val* Compiler::compile_repl_help(const goos::Object&, const goos::Object&, Env*) {
-  fmt::print(fmt::emphasis::bold, "\nREPL Controls:\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(e)\n");
-  fmt::print(" - Exit the compiler once the current REPL command is finished\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(lt [ip-address] [port-number])\n");
-  fmt::print(
-      " - Connect the listener to a running target. The IP address defaults to `127.0.0.1` and the "
-      "port to `8112`\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(r [ip-address] [port-number])\n");
-  fmt::print(
-      " - Attempt to reset the target and reconnect. After this, the target will have nothing "
-      "loaded.\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(:status)\n");
-  fmt::print(" - Send a ping-like message to the target. Requires the target to be connected\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(shutdown-target)\n");
-  fmt::print(" - If the target is connected, make it exit\n");
-
-  fmt::print(fmt::emphasis::bold, "\nCompiling & Building:\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(m \"filename\")\n");
-  fmt::print(" - Compile an OpenGOAL source file\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(ml \"filename\")\n");
-  fmt::print(" - Compile and Load an OpenGOAL source file\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(build-game)\n");
-  fmt::print(" - Loads and builds all game files and rebuilds DGOs\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(build-kernel)\n");
-  fmt::print(" - Similar to (build-game) but only the kernel files\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(blg)\n");
-  fmt::print(" - Performs a (build-game) and then loads all CGOs\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow),
-             "(build-dgos \"path/to/dgos/description/file\")\n");
-  fmt::print(
-      " - Builds all the DGO files described in the DGO description file. See "
-      "`goal_src/builds/dgos.txt` for an example.\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow),
-             "(asm-data-file tool-name \"file-name\")\n");
-  fmt::print(
-      " - Build a data file. The `tool-name` refers to which data building tool should be used.\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::yellow), "(build-data)\n");
-  fmt::print(" - Macro for rebuilding all data files\n");
-
-  fmt::print(fmt::emphasis::bold, "\nOther:\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::magenta), "(gs)\n");
-  fmt::print(" - Enter a GOOS REPL\n");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::magenta),
-             "(set-config! config-name config-value)\n");
-  fmt::print(" - Used to set compiler configuration\n");
-
+  m_repl.get()->print_help_message();
   return get_none();
 }
 
@@ -282,6 +239,13 @@ Val* Compiler::compile_listen_to_target(const goos::Object& form,
   return get_none();
 }
 
+Val* Compiler::compile_repl_clear_screen(const goos::Object& form,
+                                         const goos::Object& rest,
+                                         Env* env) {
+  m_repl.get()->clear_screen();
+  return get_none();
+}
+
 /*!
  * Send the target a command to reset, which totally resets the state of the target.
  * Optionally takes a :shutdown command which causes the exec_runtime function of the target
@@ -321,7 +285,7 @@ Val* Compiler::compile_gs(const goos::Object& form, const goos::Object& rest, En
   (void)env;
   auto args = get_va(form, rest);
   va_check(form, args, {}, {});
-  m_goos.execute_repl();
+  m_goos.execute_repl(*m_repl.get());
   return get_none();
 }
 
@@ -443,6 +407,108 @@ Val* Compiler::compile_get_info(const goos::Object& form, const goos::Object& re
   return get_none();
 }
 
+Replxx::completions_t Compiler::find_symbols_by_prefix(std::string const& context,
+                                                       int& contextLen,
+                                                       std::vector<std::string> const& user_data) {
+  auto token = m_repl.get()->get_current_repl_token(context);
+  auto possible_forms = m_symbol_info.lookup_symbols_starting_with(token.first);
+  Replxx::completions_t completions;
+  for (auto& x : possible_forms) {
+    completions.push_back(token.second ? "(" + x : x);
+  }
+  return completions;
+}
+
+Replxx::hints_t Compiler::find_hints_by_prefix(std::string const& context,
+                                               int& contextLen,
+                                               Replxx::Color& color,
+                                               std::vector<std::string> const& user_data) {
+  auto token = m_repl.get()->get_current_repl_token(context);
+  auto possible_forms = m_symbol_info.lookup_symbols_starting_with(token.first);
+
+  Replxx::hints_t hints;
+
+  // Only show hints if there are <= 3 possibilities
+  if (possible_forms.size() <= 3) {
+    for (auto& x : possible_forms) {
+      hints.push_back(token.second ? "(" + x : x);
+    }
+  }
+
+  // set hint color to green if single match found
+  if (hints.size() == 1) {
+    color = Replxx::Color::GREEN;
+  }
+
+  return hints;
+}
+
+void Compiler::repl_coloring(
+    std::string const& context,
+    Replxx::colors_t& colors,
+    std::vector<std::pair<std::string, Replxx::Color>> const& regex_color) {
+  using cl = Replxx::Color;
+  // TODO - a proper circular queue would be cleaner to use
+  std::deque<cl> paren_colors = {cl::GREEN, cl::CYAN, cl::MAGENTA};
+  std::stack<std::pair<char, cl>> expression_stack;
+
+  std::pair<int, std::string> curr_symbol = {-1, ""};
+  for (std::string::size_type i = 0; i < context.size(); i++) {
+    char curr = context.at(i);
+    // We lookup every potential symbol and color it based on it's type
+    if (std::isspace(curr) || curr == ')') {
+      // Lookup the symbol, if its legit, color it
+      if (!curr_symbol.second.empty() && curr_symbol.second.at(0) == '(') {
+        curr_symbol.second.erase(0, 1);
+        curr_symbol.first++;
+      }
+      std::vector<SymbolInfo>* sym_match = m_symbol_info.lookup_exact_name(curr_symbol.second);
+      if (sym_match != nullptr && sym_match->size() == 1) {
+        SymbolInfo sym_info = sym_match->at(0);
+        for (int pos = curr_symbol.first; pos <= i; pos++) {
+          // TODO - currently just coloring all types brown/gold
+          // - would be nice to have a different color for globals, functions, etc
+          colors.at(pos) = cl::BROWN;
+        }
+      }
+      curr_symbol = {-1, ""};
+    } else {
+      if (curr_symbol.first == -1) {
+        curr_symbol.first = i;
+      }
+      curr_symbol.second += curr;
+    }
+    // Rainbow paren coloring and known-form coloring
+    if (curr == '(') {
+      cl color = paren_colors.front();
+      expression_stack.push({curr, color});
+      colors.at(i) = color;
+      paren_colors.pop_front();
+      paren_colors.push_back(color);
+    } else if (curr == ')') {
+      if (expression_stack.empty()) {
+        colors.at(i) = cl::RED;
+      } else {
+        auto& matching_paren = expression_stack.top();
+        expression_stack.pop();
+        if (matching_paren.first == '(') {
+          if (i == context.size() - 1 && !expression_stack.empty()) {
+            colors.at(i) = cl::RED;
+          } else {
+            colors.at(i) = matching_paren.second;
+          }
+        }
+      }
+    }
+    // Reset the color order
+    if (expression_stack.empty()) {
+      paren_colors = {cl::GREEN, cl::CYAN, cl::MAGENTA};
+    }
+  }
+
+  // TODO - general syntax highlighting with regexes (quotes, symbols, etc)
+}
+
 Val* Compiler::compile_autocomplete(const goos::Object& form, const goos::Object& rest, Env* env) {
   (void)env;
   auto args = get_va(form, rest);
@@ -460,4 +526,4 @@ Val* Compiler::compile_autocomplete(const goos::Object& form, const goos::Object
              m_symbol_info.symbol_count(), time);
 
   return get_none();
-}
+}

goalc/main.cpp

@@ -7,7 +7,7 @@
 #include "third-party/fmt/core.h"
 #include "third-party/fmt/color.h"
 
-#include "common/goos/ReplHistory.h"
+#include "common/goos/ReplUtils.h"
 
 void setup_logging(bool verbose) {
   lg::set_file(file_util::get_file_path({"log/compiler.txt"}));
@@ -43,31 +43,13 @@ int main(int argc, char** argv) {
 
   lg::info("OpenGOAL Compiler {}.{}", versions::GOAL_VERSION_MAJOR, versions::GOAL_VERSION_MINOR);
 
+  // Init REPL
   std::unique_ptr<Compiler> compiler = std::make_unique<Compiler>();
 
-  // Welcome message / brief intro for documentation
-  std::string ascii;
-  ascii += " _____             _____ _____ _____ __    \n";
-  ascii += "|     |___ ___ ___|   __|     |  _  |  |   \n";
-  ascii += "|  |  | . | -_|   |  |  |  |  |     |  |__ \n";
-  ascii += "|_____|  _|___|_|_|_____|_____|__|__|_____|\n";
-  ascii += "      |_|                                  \n";
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::orange), ascii);
-
-  fmt::print("Welcome to OpenGOAL {}.{}!\n", versions::GOAL_VERSION_MAJOR,
-             versions::GOAL_VERSION_MINOR);
-  fmt::print("Run ");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(repl-help)");
-  fmt::print(" for help with common commands and REPL usage.\n");
-  fmt::print("Run ");
-  fmt::print(fmt::emphasis::bold | fg(fmt::color::cyan), "(lt)");
-  fmt::print(" to connect to the local target.\n");
-
-  ReplHistory::repl_load_history();
   if (argument.empty()) {
     ReplStatus status = ReplStatus::WANT_RELOAD;
     while (status == ReplStatus::WANT_RELOAD) {
-      compiler = std::make_unique<Compiler>();
+      compiler = std::make_unique<Compiler>(std::make_unique<ReplWrapper>());
       status = compiler->execute_repl();
       if (status == ReplStatus::WANT_RELOAD) {
         fmt::print("Reloading compiler...\n");

third-party/replxx/.appveyor.yml

@@ -0,0 +1,11 @@
+version: 1.0.{build}
+branches:
+  only:
+    - master
+configuration: Release
+build:
+build_script:
+  - md build
+  - cd %APPVEYOR_BUILD_FOLDER%\build
+  - cmake -G "Visual Studio 12 Win64" -DCMAKE_BUILD_TYPE=Release ..
+  - cmake --build . --config Release

third-party/replxx/.editorconfig

@@ -0,0 +1,8 @@
+[*]
+
+end_of_line = lf
+insert_final_newline = true
+charset = utf-8
+indent_style = tab
+indent_size = 2
+

third-party/replxx/.gitignore

@@ -0,0 +1,14 @@
+CMakeCache.txt
+CMakeFiles
+Makefile
+build
+cmake_install.cmake
+install_manifest.txt
+example
+linenoise_example
+libreplxx.a
+*.dSYM
+history.txt
+*.o
+*~
+.vs

third-party/replxx/.travis.yml

@@ -0,0 +1,14 @@
+language: C++
+dist: bionic
+script:
+  - ./build-all.sh
+  - env SKIP=8bit_encoding ./tests.py
+addons:
+  apt:
+    packages:
+      - g++
+      - cmake
+      - python3-pexpect
+sudo: false
+cache:
+  ccache: true

third-party/replxx/CMakeLists.txt

@@ -0,0 +1,220 @@
+cmake_minimum_required(VERSION 3.5)
+project(
+	replxx
+	# HOMEPAGE_URL "https://github.com/AmokHuginnsson/replxx"
+	# DESCRIPTION "replxx - Read Evaluate Print Loop library"
+	VERSION 0.0.4
+	LANGUAGES CXX C
+)
+
+if (NOT DEFINED CMAKE_CXX_STANDARD)
+	set(CMAKE_CXX_STANDARD 11)
+endif()
+
+if (NOT DEFINED CMAKE_C_STANDARD)
+	set(CMAKE_C_STANDARD 99)
+endif()
+
+set(CMAKE_WINDOWS_EXPORT_ALL_SYMBOLS ON)
+set(CMAKE_CXX_STANDARD_REQUIRED ON)
+set(CMAKE_CXX_EXTENSIONS ON)
+
+include(CMakePackageConfigHelpers)
+include(CMakeDependentOption)
+include(GenerateExportHeader)
+include(GNUInstallDirs)
+
+find_package(Threads)
+
+cmake_dependent_option(
+	REPLXX_BUILD_EXAMPLES
+	"Build the examples" ON
+	"CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR" OFF
+)
+cmake_dependent_option(
+	REPLXX_BUILD_PACKAGE
+	"Generate package target" ON
+	"CMAKE_SOURCE_DIR STREQUAL PROJECT_SOURCE_DIR" OFF
+)
+
+if (NOT CMAKE_BUILD_TYPE)
+	message(AUTHOR_WARNING "CMAKE_BUILD_TYPE not set. Defaulting to Release")
+	set(CMAKE_BUILD_TYPE Release)
+endif()
+
+# INFO
+set(REPLXX_URL_INFO_ABOUT "https://github.com/AmokHuginnsson/replxx")
+set(REPLXX_DISPLAY_NAME "replxx")
+set(REPLXX_CONTACT "amok@codestation.org")
+
+set(is-clang $<OR:$<CXX_COMPILER_ID:Clang>,$<CXX_COMPILER_ID:AppleClang>>)
+set(is-msvc $<CXX_COMPILER_ID:MSVC>)
+set(is-gnu $<CXX_COMPILER_ID:GNU>)
+set(compiler-id-clang-or-gnu $<OR:${is-clang},${is-gnu}>)
+
+set(coverage-config $<AND:$<CONFIG:Coverage>,$<OR:${is-gnu},${is-clang}>>)
+
+set(replxx-source-patterns "src/*.cpp" "src/*.cxx")
+
+if (CMAKE_VERSION VERSION_GREATER 3.11)
+	list(INSERT replxx-source-patterns 0 CONFIGURE_DEPENDS)
+endif()
+
+file(GLOB replxx-sources ${replxx-source-patterns})
+
+add_library(replxx ${replxx-sources})
+add_library(replxx::replxx ALIAS replxx)
+
+target_include_directories(
+	replxx
+	PUBLIC
+		$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/include>
+		$<INSTALL_INTERFACE:${CMAKE_INSTALL_INCLUDEDIR}>
+	PRIVATE
+		$<BUILD_INTERFACE:${PROJECT_SOURCE_DIR}/src>
+)
+target_compile_definitions(
+	replxx
+	PUBLIC
+		$<$<NOT:$<BOOL:${BUILD_SHARED_LIBS}>>:REPLXX_STATIC>
+		$<$<BOOL:${BUILD_SHARED_LIBS}>:REPLXX_BUILDING_DLL>
+	PRIVATE
+		$<$<CXX_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS=1 /ignore:4503>
+)
+target_compile_options(
+	replxx
+	PRIVATE
+		$<$<AND:$<CONFIG:RelWithDebInfo>,${compiler-id-clang-or-gnu}>:-fomit-frame-pointer>
+		$<$<AND:$<CONFIG:MinSizeRel>,${compiler-id-clang-or-gnu}>:-Os>
+		$<$<AND:$<CONFIG:Debug>,$<CXX_COMPILER_ID:GNU>>:-g -ggdb -g3 -ggdb3>
+		$<${coverage-config}:-O0 --coverage>
+		$<${coverage-config}:-fno-inline -fno-default-inline>
+		$<${coverage-config}:-fno-inline-small-functions>
+		$<${compiler-id-clang-or-gnu}:-Wall -Wextra>
+		$<$<CXX_COMPILER_ID:GNU>:-Wno-unknown-pragmas>
+)
+if (NOT CMAKE_VERSION VERSION_LESS 3.13)
+	target_link_options(
+		replxx
+		PRIVATE
+			$<${coverage-config}:--coverage>
+			$<${is-msvc}:/ignore:4099>
+	)
+else()
+# "safest" way prior to 3.13
+	target_link_libraries(
+		replxx
+		PRIVATE
+			$<${coverage-config}:--coverage>
+			$<${is-msvc}:/ignore:4099>
+	)
+endif()
+target_link_libraries(replxx PUBLIC Threads::Threads)
+set_target_properties(replxx PROPERTIES VERSION ${PROJECT_VERSION})
+
+set_property(TARGET replxx PROPERTY DEBUG_POSTFIX -d)
+set_property(TARGET replxx PROPERTY RELWITHDEBINFO_POSTFIX -rd)
+set_property(TARGET replxx PROPERTY MINSIZEREL_POSTFIX)
+if ( NOT BUILD_SHARED_LIBS AND MSVC )
+	set_property(TARGET replxx PROPERTY OUTPUT_NAME replxx-static)
+endif()
+
+generate_export_header(replxx)
+
+configure_package_config_file(
+	"${PROJECT_SOURCE_DIR}/replxx-config.cmake.in"
+	"${PROJECT_BINARY_DIR}/replxx-config.cmake"
+	INSTALL_DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/replxx
+	NO_CHECK_REQUIRED_COMPONENTS_MACRO
+	NO_SET_AND_CHECK_MACRO
+)
+
+write_basic_package_version_file(
+	"${PROJECT_BINARY_DIR}/replxx-config-version.cmake"
+	COMPATIBILITY AnyNewerVersion
+)
+
+install(
+	TARGETS replxx EXPORT replxx-targets
+	RUNTIME DESTINATION ${CMAKE_INSTALL_BINDIR}
+	LIBRARY DESTINATION ${CMAKE_INSTALL_LIBDIR}
+	ARCHIVE DESTINATION ${CMAKE_INSTALL_LIBDIR}
+)
+
+install(
+	EXPORT replxx-targets
+	NAMESPACE replxx::
+	DESTINATION ${CMAKE_INSTALL_DATADIR}/cmake/replxx
+)
+
+install(
+	FILES
+		"${PROJECT_BINARY_DIR}/replxx-config-version.cmake"
+		"${PROJECT_BINARY_DIR}/replxx-config.cmake"
+	DESTINATION
+		${CMAKE_INSTALL_DATADIR}/cmake/replxx
+)
+
+# headers
+install(
+	FILES
+		include/replxx.hxx
+		include/replxx.h
+	DESTINATION
+		${CMAKE_INSTALL_INCLUDEDIR}
+)
+
+if (REPLXX_BUILD_EXAMPLES)
+	add_executable(replxx-example-cxx-api "")
+	add_executable(replxx-example-c-api "")
+
+	target_sources(
+		replxx-example-cxx-api
+		PRIVATE
+			examples/cxx-api.cxx
+			examples/util.c
+	)
+	target_sources(
+		replxx-example-c-api
+		PRIVATE
+			examples/c-api.c
+			examples/util.c
+	)
+	target_compile_definitions(replxx-example-cxx-api PRIVATE REPLXX_STATIC $<$<CXX_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS=1>)
+	target_compile_definitions(replxx-example-c-api PRIVATE REPLXX_STATIC $<$<CXX_COMPILER_ID:MSVC>:_CRT_SECURE_NO_WARNINGS=1>)
+	target_link_libraries(replxx-example-cxx-api PRIVATE replxx::replxx)
+	target_link_libraries(
+		replxx-example-c-api
+		PRIVATE
+		replxx::replxx
+		$<${compiler-id-clang-or-gnu}:stdc++>
+		$<${is-clang}:m>
+		$<${coverage-config}:--coverage>
+	)
+	target_link_libraries(
+		replxx-example-cxx-api
+		PRIVATE
+		$<${coverage-config}:--coverage>
+	)
+endif()
+
+if (NOT REPLXX_BUILD_PACKAGE)
+	return()
+endif()
+
+include(CPack)
+
+set(CPACK_SET_DESTDIR ON)
+
+set(CPACK_PACKAGE_DESCRIPTION_SUMMARY "Readline and libedit replacement library")
+set(CPACK_PACKAGE_HOMEPAGE_URL "${REPLXX_URL_INFO_ABOUT}")
+set(CPACK_PACKAGE_VENDOR	"codestation.org")
+set(CPACK_PACKAGE_CONTACT "amok@codestation.org")
+set(CPACK_PACKAGE_VERSION "${PROJECT_VERSION}")
+
+set(CPACK_RESOURCE_FILE_LICENSE "${PROJECT_SOURCE_DIR}/LICENSE")
+
+set(CPACK_STRIP_FILES "ON")
+
+set(CPACK_DEBIAN_PACKAGE_SECTION "utilities")
+

third-party/replxx/LICENSE.md

@@ -0,0 +1,63 @@
+Copyright (c) 2017-2018, Marcin Konarski (amok at codestation.org)  
+Copyright (c) 2010, Salvatore Sanfilippo (antirez at gmail dot com)  
+Copyright (c) 2010, Pieter Noordhuis (pcnoordhuis at gmail dot com)
+
+All rights reserved.
+
+Redistribution and use in source and binary forms, with or without
+modification, are permitted provided that the following conditions are met:
+
+  * Redistributions of source code must retain the above copyright notice,
+    this list of conditions and the following disclaimer.
+  * Redistributions in binary form must reproduce the above copyright
+    notice, this list of conditions and the following disclaimer in the
+    documentation and/or other materials provided with the distribution.
+  * Neither the name of Redis nor the names of its contributors may be used
+    to endorse or promote products derived from this software without
+    specific prior written permission.
+
+THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+POSSIBILITY OF SUCH DAMAGE.
+
+
+wcwidth.cpp
+===========
+
+Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+
+Permission to use, copy, modify, and distribute this software
+for any purpose and without fee is hereby granted. The author
+disclaims all warranties with regard to this software.
+
+
+ConvertUTF.cpp
+==============
+
+Copyright 2001-2004 Unicode, Inc.
+
+Disclaimer
+
+This source code is provided as is by Unicode, Inc. No claims are
+made as to fitness for any particular purpose. No warranties of any
+kind are expressed or implied. The recipient agrees to determine
+applicability of information provided. If this file has been
+purchased on magnetic or optical media from Unicode, Inc., the
+sole remedy for any claim will be exchange of defective media
+within 90 days of receipt.
+
+Limitations on Rights to Redistribute This Code
+
+Unicode, Inc. hereby grants the right to freely use the information
+supplied in this file in the creation of products supporting the
+Unicode Standard, and to make copies of this file in any form
+for internal or external distribution as long as this notice
+remains attached.

third-party/replxx/README.md

@@ -0,0 +1,119 @@
+# Read Evaluate Print Loop ++
+
+![demo](https://drive.google.com/uc?export=download&id=0B53g2Y3z7rWNT2dCRGVVNldaRnc)
+
+[![Build Status](https://travis-ci.org/AmokHuginnsson/replxx.svg?branch=master)](https://travis-ci.org/AmokHuginnsson/replxx)
+
+A small, portable GNU readline replacement for Linux, Windows and
+MacOS which is capable of handling UTF-8 characters. Unlike GNU
+readline, which is GPL, this library uses a BSD license and can be
+used in any kind of program.
+
+## Origin
+
+This replxx implementation is based on the work by
+[ArangoDB Team](https://github.com/arangodb/linenoise-ng) and
+[Salvatore Sanfilippo](https://github.com/antirez/linenoise) and
+10gen Inc.  The goal is to create a zero-config, BSD
+licensed, readline replacement usable in Apache2 or BSD licensed
+programs.
+
+## Features
+
+* single-line and multi-line editing mode with the usual key bindings implemented
+* history handling
+* completion
+* syntax highlighting
+* hints
+* BSD license source code
+* Only uses a subset of VT100 escapes (ANSI.SYS compatible)
+* UTF8 aware
+* support for Linux, MacOS and Windows
+
+It deviates from Salvatore's original goal to have a minimal readline
+replacement for the sake of supporting UTF8 and Windows. It deviates
+from 10gen Inc.'s goal to create a C++ interface to linenoise. This
+library uses C++ internally, but to the user it provides a pure C
+interface that is compatible with the original linenoise API.
+C interface.
+
+## Requirements
+
+To build this library, you will need a C++11-enabled compiler and
+some recent version of CMake.
+
+## Build instructions
+
+### *nix
+
+1. Create a build directory
+
+```bash
+mkdir -p build && cd build
+```
+
+2. Build the library
+
+```bash
+cmake -DCMAKE_BUILD_TYPE=Release .. && make
+```
+
+3. Install the library at the default target location
+
+```bash
+sudo make install
+```
+
+The default installation location can be adjusted by setting the `DESTDIR`
+variable when invoking `make install`:
+
+```bash
+make DESTDIR=/tmp install
+```
+
+### Windows
+
+1. Create a build directory in MS-DOS command prompt
+
+```
+md build
+cd build
+```
+
+2. Generate Visual Studio solution file with cmake
+
+* 32 bit: 
+```bash
+cmake -G "Visual Studio 12 2013" -DCMAKE_BUILD_TYPE=Release ..
+```
+* 64 bit:
+```bash
+cmake -G "Visual Studio 12 2013 Win64" -DCMAKE_BUILD_TYPE=Release ..
+```
+
+3. Open the generated file `replxx.sln` in the `build` subdirectory with Visual Studio.
+
+## Tested with...
+
+ * Linux text only console ($TERM = linux)
+ * Linux KDE terminal application ($TERM = xterm)
+ * Linux xterm ($TERM = xterm)
+ * Linux Buildroot ($TERM = vt100)
+ * Mac OS X iTerm ($TERM = xterm)
+ * Mac OS X default Terminal.app ($TERM = xterm)
+ * OpenBSD 4.5 through an OSX Terminal.app ($TERM = screen)
+ * IBM AIX 6.1
+ * FreeBSD xterm ($TERM = xterm)
+ * ANSI.SYS
+ * Emacs comint mode ($TERM = dumb)
+ * Windows
+
+Please test it everywhere you can and report back!
+
+## Let's push this forward!
+
+Patches should be provided in the respect of linenoise sensibility for
+small and easy to understand code that and the license
+restrictions. Extensions must be submitted under a BSD license-style.
+A contributor license is required for contributions.
+

third-party/replxx/build-all.sh

@@ -0,0 +1,93 @@
+#! /bin/sh
+
+while [ ${#} -gt 0 ] ; do
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xpurge" \) ] ; then
+		${sudo} /bin/rm -rf build
+		shift
+		continue
+	fi
+
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xsudo" \) ] ; then
+		sudo="sudo"
+		shift
+		continue
+	fi
+
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xmsvcxx" \) ] ; then
+		msvcxx=1
+		shift
+		continue
+	fi
+
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xx86" \) ] ; then
+		arch="-A Win32"
+		shift
+		continue
+	fi
+
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xstatic-only" \) ] ; then
+		skip="shared"
+		shift
+		continue
+	fi
+
+	if [ \( ${#} -gt 0 \) -a \( "x${1}" = "xshared-only" \) ] ; then
+		skip="static"
+		shift
+		continue
+	fi
+
+	if [ ${#} -gt 0 ] ; then
+		installPrefix="-DCMAKE_INSTALL_PREFIX=${1}"
+		shift
+		continue
+	fi
+done
+
+umask 0022
+
+build_target() {
+	target="${1}"
+	linkMode="${2}"
+	if [ "x${linkMode}" = "xshared" ] ; then
+		shared="-DBUILD_SHARED_LIBS=ON"
+		examples="-DREPLXX_BUILD_EXAMPLES=OFF"
+	else
+		shared="-DBUILD_SHARED_LIBS=OFF"
+		examples="-DREPLXX_BUILD_EXAMPLES=ON"
+	fi
+	mkdir -p "build/${target}"
+	cd "build/${target}"
+	if [ "x${msvcxx}" = "x1" ] ; then
+		vswhere="/cygdrive/c/Program Files (x86)/Microsoft Visual Studio/Installer/vswhere.exe"
+		if [ -f "${vswhere}" ] ; then
+			name="$("${vswhere}" -latest -property catalog_productName | tr -d '\r')"
+			ver=$("${vswhere}" -latest -property installationVersion | awk -F '.' '{print $1}')
+		else
+			name="Visual Studio"
+			ver="14"
+		fi
+		cmake="/cygdrive/c/Program Files/CMake/bin/cmake.exe"
+		"${cmake}" ${STATIC} ${shared} ${examples} -G "${name} ${ver}" ${arch} ${installPrefix} ../../
+		"${cmake}" --build . --config Debug
+		"${cmake}" --build . --config Release
+		"${cmake}" --build . --config Debug --target Install
+		"${cmake}" --build . --config Release --target Install
+	else
+		cmake -DCMAKE_BUILD_TYPE=${target} ${shared} ${examples} ${installPrefix} ../../
+		make
+		echo "### `hostname` ###"
+		${sudo} make install
+	fi
+	cd ../..
+}
+
+for target in debug release ; do
+	for linkMode in shared static ; do
+		if [ "x${linkMode}" = "x${skip}" ] ; then
+			continue
+		fi
+		build_target "${target}" "${linkMode}"
+	done
+done
+

third-party/replxx/examples/c-api.c

@@ -0,0 +1,235 @@
+#ifndef __sun
+#define _POSIX_C_SOURCE 200809L
+#else
+#define __EXTENSIONS__ 1
+#endif
+
+#include <ctype.h>
+#include <string.h>
+#include <stdio.h>
+#include <string.h>
+#include <stdlib.h>
+#include <errno.h>
+
+#include "replxx.h"
+#include "util.h"
+
+void modify_callback(char** line, int* cursorPosition, void* ud) {
+	char* s = *line;
+	char* p = strchr( s, '*' );
+	if ( p ) {
+		int len = (int)strlen( s );
+		char* n = *line = calloc( len * 2, 1 );
+		int i = (int)( p - s );
+		strncpy(n, s, i);
+		n += i;
+		strncpy(n, s, i);
+		n += i;
+		strncpy(n, p + 1, len - i - 1);
+		n += ( len - i - 1 );
+		strncpy(n, p + 1, len - i - 1);
+		*cursorPosition *= 2;
+		free( s );
+	}
+}
+
+void completionHook(char const* context, replxx_completions* lc, int* contextLen, void* ud) {
+	char** examples = (char**)( ud );
+	size_t i;
+
+	int utf8ContextLen = context_len( context );
+	int prefixLen = (int)strlen( context ) - utf8ContextLen;
+	*contextLen = utf8str_codepoint_len( context + prefixLen, utf8ContextLen );
+	for (i = 0;	examples[i] != NULL; ++i) {
+		if (strncmp(context + prefixLen, examples[i], utf8ContextLen) == 0) {
+			replxx_add_completion(lc, examples[i]);
+		}
+	}
+}
+
+void hintHook(char const* context, replxx_hints* lc, int* contextLen, ReplxxColor* c, void* ud) {
+	char** examples = (char**)( ud );
+	int i;
+	int utf8ContextLen = context_len( context );
+	int prefixLen = (int)strlen( context ) - utf8ContextLen;
+	*contextLen = utf8str_codepoint_len( context + prefixLen, utf8ContextLen );
+	if ( *contextLen > 0 ) {
+		for (i = 0;	examples[i] != NULL; ++i) {
+			if (strncmp(context + prefixLen, examples[i], utf8ContextLen) == 0) {
+				replxx_add_hint(lc, examples[i]);
+			}
+		}
+	}
+}
+
+void colorHook( char const* str_, ReplxxColor* colors_, int size_, void* ud ) {
+	int i = 0;
+	for ( ; i < size_; ++ i ) {
+		if ( isdigit( str_[i] ) ) {
+			colors_[i] = REPLXX_COLOR_BRIGHTMAGENTA;
+		}
+	}
+	if ( ( size_ > 0 ) && ( str_[size_ - 1] == '(' ) ) {
+		replxx_emulate_key_press( ud, ')' );
+		replxx_emulate_key_press( ud, REPLXX_KEY_LEFT );
+	}
+}
+
+ReplxxActionResult word_eater( int ignored, void* ud ) {
+	Replxx* replxx = (Replxx*)ud;
+	return ( replxx_invoke( replxx, REPLXX_ACTION_KILL_TO_BEGINING_OF_WORD, 0 ) );
+}
+
+ReplxxActionResult upper_case_line( int ignored, void* ud ) {
+	Replxx* replxx = (Replxx*)ud;
+	ReplxxState state;
+	replxx_get_state( replxx, &state );
+	int l = (int)strlen( state.text );
+#ifdef _WIN32
+#define strdup _strdup
+#endif
+	char* d = strdup( state.text );
+#undef strdup
+	for ( int i = 0; i < l; ++ i ) {
+		d[i] = toupper( d[i] );
+	}
+	state.text = d;
+	state.cursorPosition /= 2;
+	replxx_set_state( replxx, &state );
+	free( d );
+	return ( REPLXX_ACTION_RESULT_CONTINUE );
+}
+
+char const* recode( char* s ) {
+	char const* r = s;
+	while ( *s ) {
+		if ( *s == '~' ) {
+			*s = '\n';
+		}
+		++ s;
+	}
+	return ( r );
+}
+
+void split( char* str_, char** data_, int size_ ) {
+	int i = 0;
+	char* p = str_, *o = p;
+	while ( i < size_ ) {
+		int last = *p == 0;
+		if ( ( *p == ',' ) || last ) {
+			*p = 0;
+			data_[i ++] = o;
+			o = p + 1;
+			if ( last ) {
+				break;
+			}
+		}
+		++ p;
+	}
+	data_[i] = 0;
+}
+
+int main( int argc, char** argv ) {
+#define MAX_EXAMPLE_COUNT 128
+	char* examples[MAX_EXAMPLE_COUNT + 1] = {
+		"db", "hello", "hallo", "hans", "hansekogge", "seamann", "quetzalcoatl", "quit", "power", NULL
+	};
+	Replxx* replxx = replxx_init();
+	replxx_install_window_change_handler( replxx );
+
+	int quiet = 0;
+	char const* prompt = "\x1b[1;32mreplxx\x1b[0m> ";
+	int installModifyCallback = 0;
+	int installCompletionCallback = 1;
+	int installHighlighterCallback = 1;
+	int installHintsCallback = 1;
+	while ( argc > 1 ) {
+		-- argc;
+		++ argv;
+#ifdef __REPLXX_DEBUG__
+		if ( !strcmp( *argv, "--keycodes" ) ) {
+			replxx_debug_dump_print_codes();
+			exit(0);
+		}
+#endif
+		switch ( (*argv)[0] ) {
+			case 'b': replxx_set_beep_on_ambiguous_completion( replxx, (*argv)[1] - '0' ); break;
+			case 'c': replxx_set_completion_count_cutoff( replxx, atoi( (*argv) + 1 ) );   break;
+			case 'e': replxx_set_complete_on_empty( replxx, (*argv)[1] - '0' );            break;
+			case 'd': replxx_set_double_tab_completion( replxx, (*argv)[1] - '0' );        break;
+			case 'h': replxx_set_max_hint_rows( replxx, atoi( (*argv) + 1 ) );             break;
+			case 'H': replxx_set_hint_delay( replxx, atoi( (*argv) + 1 ) );                break;
+			case 's': replxx_set_max_history_size( replxx, atoi( (*argv) + 1 ) );          break;
+			case 'i': replxx_set_preload_buffer( replxx, recode( (*argv) + 1 ) );          break;
+			case 'I': replxx_set_immediate_completion( replxx, (*argv)[1] - '0' );         break;
+			case 'u': replxx_set_unique_history( replxx, (*argv)[1] - '0' );               break;
+			case 'w': replxx_set_word_break_characters( replxx, (*argv) + 1 );             break;
+			case 'm': replxx_set_no_color( replxx, (*argv)[1] - '0' );                     break;
+			case 'B': replxx_enable_bracketed_paste( replxx );                             break;
+			case 'p': prompt = recode( (*argv) + 1 );                                      break;
+			case 'q': quiet = atoi( (*argv) + 1 );                                         break;
+			case 'M': installModifyCallback = atoi( (*argv) + 1 );                         break;
+			case 'C': installCompletionCallback = 0;                                       break;
+			case 'S': installHighlighterCallback = 0;                                      break;
+			case 'N': installHintsCallback = 0;                                            break;
+			case 'x': split( (*argv) + 1, examples, MAX_EXAMPLE_COUNT );                   break;
+		}
+
+	}
+
+	const char* file = "./replxx_history.txt";
+
+	replxx_history_load( replxx, file );
+	if ( installModifyCallback ) {
+		replxx_set_modify_callback( replxx, modify_callback, 0 );
+	}
+	if ( installCompletionCallback ) {
+		replxx_set_completion_callback( replxx, completionHook, examples );
+	}
+	if ( installHighlighterCallback ) {
+		replxx_set_highlighter_callback( replxx, colorHook, replxx );
+	}
+	if ( installHintsCallback ) {
+		replxx_set_hint_callback( replxx, hintHook, examples );
+	}
+	replxx_bind_key( replxx, '.', word_eater, replxx );
+	replxx_bind_key( replxx, REPLXX_KEY_F2, upper_case_line, replxx );
+
+	printf("starting...\n");
+
+	while (1) {
+		char const* result = NULL;
+		do {
+			result = replxx_input( replxx, prompt );
+		} while ( ( result == NULL ) && ( errno == EAGAIN ) );
+
+		if (result == NULL) {
+			printf("\n");
+			break;
+		} else if (!strncmp(result, "/history", 9)) {
+			/* Display the current history. */
+			int index = 0;
+			int size = replxx_history_size( replxx );
+			ReplxxHistoryScan* hs = replxx_history_scan_start( replxx );
+			ReplxxHistoryEntry he;
+			for ( ; replxx_history_scan_next( replxx, hs, &he ) == 0; ++index ) {
+				replxx_print( replxx, "%4d: %s\n", index, he.text );
+			}
+			replxx_history_scan_stop( replxx, hs );
+		} else if (!strncmp(result, "/unique", 8)) {
+			replxx_set_unique_history( replxx, 1 );
+		} else if (!strncmp(result, "/eb", 4)) {
+			replxx_enable_bracketed_paste( replxx );
+		} else if (!strncmp(result, "/db", 4)) {
+			replxx_disable_bracketed_paste( replxx );
+		}
+		if (*result != '\0') {
+			replxx_print( replxx, quiet ? "%s\n" : "thanks for the input: %s\n", result );
+			replxx_history_add( replxx, result );
+		}
+	}
+	replxx_history_save( replxx, file );
+	printf( "Exiting Replxx\n" );
+	replxx_end( replxx );
+}
+

third-party/replxx/examples/cxx-api.cxx

@@ -0,0 +1,453 @@
+#include <regex>
+#include <string>
+#include <vector>
+#include <cerrno>
+#include <cctype>
+#include <cstdlib>
+#include <utility>
+#include <iomanip>
+#include <iostream>
+#include <thread>
+#include <chrono>
+
+#include "replxx.hxx"
+#include "util.h"
+
+using Replxx = replxx::Replxx;
+
+class Tick {
+	typedef std::vector<char32_t> keys_t;
+	std::thread _thread;
+	int _tick;
+	bool _alive;
+	keys_t _keys;
+	Replxx& _replxx;
+public:
+	Tick( Replxx& replxx_, std::string const& keys_ = {} )
+		: _thread()
+		, _tick( 0 )
+		, _alive( false )
+		, _keys( keys_.begin(), keys_.end() )
+		, _replxx( replxx_ ) {
+	}
+	void start() {
+		_alive = true;
+		_thread = std::thread( &Tick::run, this );
+	}
+	void stop() {
+		_alive = false;
+		_thread.join();
+	}
+	void run() {
+		std::string s;
+		while ( _alive ) {
+			if ( _keys.empty() ) {
+				_replxx.print( "%d\n", _tick );
+			} else if ( _tick < static_cast<int>( _keys.size() ) ) {
+				_replxx.emulate_key_press( _keys[_tick] );
+			} else {
+				break;
+			}
+			++ _tick;
+			std::this_thread::sleep_for( std::chrono::seconds( 1 ) );
+		}
+	}
+};
+
+// prototypes
+Replxx::completions_t hook_completion(std::string const& context, int& contextLen, std::vector<std::string> const& user_data);
+Replxx::hints_t hook_hint(std::string const& context, int& contextLen, Replxx::Color& color, std::vector<std::string> const& user_data);
+void hook_color(std::string const& str, Replxx::colors_t& colors, std::vector<std::pair<std::string, Replxx::Color>> const& user_data);
+
+Replxx::completions_t hook_completion(std::string const& context, int& contextLen, std::vector<std::string> const& examples) {
+	Replxx::completions_t completions;
+	int utf8ContextLen( context_len( context.c_str() ) );
+	int prefixLen( static_cast<int>( context.length() ) - utf8ContextLen );
+	if ( ( prefixLen > 0 ) && ( context[prefixLen - 1] == '\\' ) ) {
+		-- prefixLen;
+		++ utf8ContextLen;
+	}
+	contextLen = utf8str_codepoint_len( context.c_str() + prefixLen, utf8ContextLen );
+
+	std::string prefix { context.substr(prefixLen) };
+	if ( prefix == "\\pi" ) {
+		completions.push_back( "π" );
+	} else {
+		for (auto const& e : examples) {
+			if (e.compare(0, prefix.size(), prefix) == 0) {
+				Replxx::Color c( Replxx::Color::DEFAULT );
+				if ( e.find( "brightred" ) != std::string::npos ) {
+					c = Replxx::Color::BRIGHTRED;
+				} else if ( e.find( "red" ) != std::string::npos ) {
+					c = Replxx::Color::RED;
+				}
+				completions.emplace_back(e.c_str(), c);
+			}
+		}
+	}
+
+	return completions;
+}
+
+Replxx::hints_t hook_hint(std::string const& context, int& contextLen, Replxx::Color& color, std::vector<std::string> const& examples) {
+	Replxx::hints_t hints;
+
+	// only show hint if prefix is at least 'n' chars long
+	// or if prefix begins with a specific character
+
+	int utf8ContextLen( context_len( context.c_str() ) );
+	int prefixLen( static_cast<int>( context.length() ) - utf8ContextLen );
+	contextLen = utf8str_codepoint_len( context.c_str() + prefixLen, utf8ContextLen );
+	std::string prefix { context.substr(prefixLen) };
+
+	if (prefix.size() >= 2 || (! prefix.empty() && prefix.at(0) == '.')) {
+		for (auto const& e : examples) {
+			if (e.compare(0, prefix.size(), prefix) == 0) {
+				hints.emplace_back(e.c_str());
+			}
+		}
+	}
+
+	// set hint color to green if single match found
+	if (hints.size() == 1) {
+		color = Replxx::Color::GREEN;
+	}
+
+	return hints;
+}
+
+void hook_color(std::string const& context, Replxx::colors_t& colors, std::vector<std::pair<std::string, Replxx::Color>> const& regex_color) {
+	// highlight matching regex sequences
+	for (auto const& e : regex_color) {
+		size_t pos {0};
+		std::string str = context;
+		std::smatch match;
+
+		while(std::regex_search(str, match, std::regex(e.first))) {
+			std::string c{ match[0] };
+			std::string prefix( match.prefix().str() );
+			pos += utf8str_codepoint_len( prefix.c_str(), static_cast<int>( prefix.length() ) );
+			int len( utf8str_codepoint_len( c.c_str(), static_cast<int>( c.length() ) ) );
+
+			for (int i = 0; i < len; ++i) {
+				colors.at(pos + i) = e.second;
+			}
+
+			pos += len;
+			str = match.suffix();
+		}
+	}
+}
+
+Replxx::ACTION_RESULT message( Replxx& replxx, std::string s, char32_t ) {
+	replxx.invoke( Replxx::ACTION::CLEAR_SELF, 0 );
+	replxx.print( "%s\n", s.c_str() );
+	replxx.invoke( Replxx::ACTION::REPAINT, 0 );
+	return ( Replxx::ACTION_RESULT::CONTINUE );
+}
+
+int main( int argc_, char** argv_ ) {
+	// words to be completed
+	std::vector<std::string> examples {
+		".help", ".history", ".quit", ".exit", ".clear", ".prompt ",
+		"hello", "world", "db", "data", "drive", "print", "put",
+		"color_black", "color_red", "color_green", "color_brown", "color_blue",
+		"color_magenta", "color_cyan", "color_lightgray", "color_gray",
+		"color_brightred", "color_brightgreen", "color_yellow", "color_brightblue",
+		"color_brightmagenta", "color_brightcyan", "color_white", "color_normal",
+	};
+
+	// highlight specific words
+	// a regex string, and a color
+	// the order matters, the last match will take precedence
+	using cl = Replxx::Color;
+	std::vector<std::pair<std::string, cl>> regex_color {
+		// single chars
+		{"\\`", cl::BRIGHTCYAN},
+		{"\\'", cl::BRIGHTBLUE},
+		{"\\\"", cl::BRIGHTBLUE},
+		{"\\-", cl::BRIGHTBLUE},
+		{"\\+", cl::BRIGHTBLUE},
+		{"\\=", cl::BRIGHTBLUE},
+		{"\\/", cl::BRIGHTBLUE},
+		{"\\*", cl::BRIGHTBLUE},
+		{"\\^", cl::BRIGHTBLUE},
+		{"\\.", cl::BRIGHTMAGENTA},
+		{"\\(", cl::BRIGHTMAGENTA},
+		{"\\)", cl::BRIGHTMAGENTA},
+		{"\\[", cl::BRIGHTMAGENTA},
+		{"\\]", cl::BRIGHTMAGENTA},
+		{"\\{", cl::BRIGHTMAGENTA},
+		{"\\}", cl::BRIGHTMAGENTA},
+
+		// color keywords
+		{"color_black", cl::BLACK},
+		{"color_red", cl::RED},
+		{"color_green", cl::GREEN},
+		{"color_brown", cl::BROWN},
+		{"color_blue", cl::BLUE},
+		{"color_magenta", cl::MAGENTA},
+		{"color_cyan", cl::CYAN},
+		{"color_lightgray", cl::LIGHTGRAY},
+		{"color_gray", cl::GRAY},
+		{"color_brightred", cl::BRIGHTRED},
+		{"color_brightgreen", cl::BRIGHTGREEN},
+		{"color_yellow", cl::YELLOW},
+		{"color_brightblue", cl::BRIGHTBLUE},
+		{"color_brightmagenta", cl::BRIGHTMAGENTA},
+		{"color_brightcyan", cl::BRIGHTCYAN},
+		{"color_white", cl::WHITE},
+		{"color_normal", cl::NORMAL},
+
+		// commands
+		{"\\.help", cl::BRIGHTMAGENTA},
+		{"\\.history", cl::BRIGHTMAGENTA},
+		{"\\.quit", cl::BRIGHTMAGENTA},
+		{"\\.exit", cl::BRIGHTMAGENTA},
+		{"\\.clear", cl::BRIGHTMAGENTA},
+		{"\\.prompt", cl::BRIGHTMAGENTA},
+
+		// numbers
+		{"[\\-|+]{0,1}[0-9]+", cl::YELLOW}, // integers
+		{"[\\-|+]{0,1}[0-9]*\\.[0-9]+", cl::YELLOW}, // decimals
+		{"[\\-|+]{0,1}[0-9]+e[\\-|+]{0,1}[0-9]+", cl::YELLOW}, // scientific notation
+
+		// strings
+		{"\".*?\"", cl::BRIGHTGREEN}, // double quotes
+		{"\'.*?\'", cl::BRIGHTGREEN}, // single quotes
+	};
+
+	// init the repl
+	Replxx rx;
+	Tick tick( rx, argc_ > 1 ? argv_[1] : "" );
+	rx.install_window_change_handler();
+
+	// the path to the history file
+	std::string history_file {"./replxx_history.txt"};
+
+	// load the history file if it exists
+	rx.history_load(history_file);
+
+	// set the max history size
+	rx.set_max_history_size(128);
+
+	// set the max number of hint rows to show
+	rx.set_max_hint_rows(3);
+
+	// set the callbacks
+	using namespace std::placeholders;
+	rx.set_completion_callback( std::bind( &hook_completion, _1, _2, cref( examples ) ) );
+	rx.set_highlighter_callback( std::bind( &hook_color, _1, _2, cref( regex_color ) ) );
+	rx.set_hint_callback( std::bind( &hook_hint, _1, _2, _3, cref( examples ) ) );
+
+	// other api calls
+	rx.set_word_break_characters( " \t.,-%!;:=*~^'\"/?<>|[](){}" );
+	rx.set_completion_count_cutoff( 128 );
+	rx.set_double_tab_completion( false );
+	rx.set_complete_on_empty( true );
+	rx.set_beep_on_ambiguous_completion( false );
+	rx.set_no_color( false );
+
+	// showcase key bindings
+	rx.bind_key_internal( Replxx::KEY::BACKSPACE,                      "delete_character_left_of_cursor" );
+	rx.bind_key_internal( Replxx::KEY::DELETE,                         "delete_character_under_cursor" );
+	rx.bind_key_internal( Replxx::KEY::LEFT,                           "move_cursor_left" );
+	rx.bind_key_internal( Replxx::KEY::RIGHT,                          "move_cursor_right" );
+	rx.bind_key_internal( Replxx::KEY::UP,                             "history_previous" );
+	rx.bind_key_internal( Replxx::KEY::DOWN,                           "history_next" );
+	rx.bind_key_internal( Replxx::KEY::PAGE_UP,                        "history_first" );
+	rx.bind_key_internal( Replxx::KEY::PAGE_DOWN,                      "history_last" );
+	rx.bind_key_internal( Replxx::KEY::HOME,                           "move_cursor_to_begining_of_line" );
+	rx.bind_key_internal( Replxx::KEY::END,                            "move_cursor_to_end_of_line" );
+	rx.bind_key_internal( Replxx::KEY::TAB,                            "complete_line" );
+	rx.bind_key_internal( Replxx::KEY::control( Replxx::KEY::LEFT ),   "move_cursor_one_word_left" );
+	rx.bind_key_internal( Replxx::KEY::control( Replxx::KEY::RIGHT ),  "move_cursor_one_word_right" );
+	rx.bind_key_internal( Replxx::KEY::control( Replxx::KEY::UP ),     "hint_previous" );
+	rx.bind_key_internal( Replxx::KEY::control( Replxx::KEY::DOWN ),   "hint_next" );
+	rx.bind_key_internal( Replxx::KEY::control( Replxx::KEY::ENTER ),  "commit_line" );
+	rx.bind_key_internal( Replxx::KEY::control( 'R' ),                 "history_incremental_search" );
+	rx.bind_key_internal( Replxx::KEY::control( 'W' ),                 "kill_to_begining_of_word" );
+	rx.bind_key_internal( Replxx::KEY::control( 'U' ),                 "kill_to_begining_of_line" );
+	rx.bind_key_internal( Replxx::KEY::control( 'K' ),                 "kill_to_end_of_line" );
+	rx.bind_key_internal( Replxx::KEY::control( 'Y' ),                 "yank" );
+	rx.bind_key_internal( Replxx::KEY::control( 'L' ),                 "clear_screen" );
+	rx.bind_key_internal( Replxx::KEY::control( 'D' ),                 "send_eof" );
+	rx.bind_key_internal( Replxx::KEY::control( 'C' ),                 "abort_line" );
+	rx.bind_key_internal( Replxx::KEY::control( 'T' ),                 "transpose_characters" );
+#ifndef _WIN32
+	rx.bind_key_internal( Replxx::KEY::control( 'V' ),                 "verbatim_insert" );
+	rx.bind_key_internal( Replxx::KEY::control( 'Z' ),                 "suspend" );
+#endif
+	rx.bind_key_internal( Replxx::KEY::meta( Replxx::KEY::BACKSPACE ), "kill_to_whitespace_on_left" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'p' ),                    "history_common_prefix_search" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'n' ),                    "history_common_prefix_search" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'd' ),                    "kill_to_end_of_word" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'y' ),                    "yank_cycle" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'u' ),                    "uppercase_word" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'l' ),                    "lowercase_word" );
+	rx.bind_key_internal( Replxx::KEY::meta( 'c' ),                    "capitalize_word" );
+	rx.bind_key_internal( 'a',                                         "insert_character" );
+	rx.bind_key_internal( Replxx::KEY::INSERT,                         "toggle_overwrite_mode" );
+	rx.bind_key( Replxx::KEY::F1, std::bind( &message, std::ref( rx ), "<F1>", _1 ) );
+	rx.bind_key( Replxx::KEY::F2, std::bind( &message, std::ref( rx ), "<F2>", _1 ) );
+	rx.bind_key( Replxx::KEY::F3, std::bind( &message, std::ref( rx ), "<F3>", _1 ) );
+	rx.bind_key( Replxx::KEY::F4, std::bind( &message, std::ref( rx ), "<F4>", _1 ) );
+	rx.bind_key( Replxx::KEY::F5, std::bind( &message, std::ref( rx ), "<F5>", _1 ) );
+	rx.bind_key( Replxx::KEY::F6, std::bind( &message, std::ref( rx ), "<F6>", _1 ) );
+	rx.bind_key( Replxx::KEY::F7, std::bind( &message, std::ref( rx ), "<F7>", _1 ) );
+	rx.bind_key( Replxx::KEY::F8, std::bind( &message, std::ref( rx ), "<F8>", _1 ) );
+	rx.bind_key( Replxx::KEY::F9, std::bind( &message, std::ref( rx ), "<F9>", _1 ) );
+	rx.bind_key( Replxx::KEY::F10, std::bind( &message, std::ref( rx ), "<F10>", _1 ) );
+	rx.bind_key( Replxx::KEY::F11, std::bind( &message, std::ref( rx ), "<F11>", _1 ) );
+	rx.bind_key( Replxx::KEY::F12, std::bind( &message, std::ref( rx ), "<F12>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F1 ), std::bind( &message, std::ref( rx ), "<S-F1>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F2 ), std::bind( &message, std::ref( rx ), "<S-F2>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F3 ), std::bind( &message, std::ref( rx ), "<S-F3>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F4 ), std::bind( &message, std::ref( rx ), "<S-F4>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F5 ), std::bind( &message, std::ref( rx ), "<S-F5>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F6 ), std::bind( &message, std::ref( rx ), "<S-F6>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F7 ), std::bind( &message, std::ref( rx ), "<S-F7>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F8 ), std::bind( &message, std::ref( rx ), "<S-F8>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F9 ), std::bind( &message, std::ref( rx ), "<S-F9>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F10 ), std::bind( &message, std::ref( rx ), "<S-F10>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F11 ), std::bind( &message, std::ref( rx ), "<S-F11>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::F12 ), std::bind( &message, std::ref( rx ), "<S-F12>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F1 ), std::bind( &message, std::ref( rx ), "<C-F1>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F2 ), std::bind( &message, std::ref( rx ), "<C-F2>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F3 ), std::bind( &message, std::ref( rx ), "<C-F3>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F4 ), std::bind( &message, std::ref( rx ), "<C-F4>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F5 ), std::bind( &message, std::ref( rx ), "<C-F5>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F6 ), std::bind( &message, std::ref( rx ), "<C-F6>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F7 ), std::bind( &message, std::ref( rx ), "<C-F7>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F8 ), std::bind( &message, std::ref( rx ), "<C-F8>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F9 ), std::bind( &message, std::ref( rx ), "<C-F9>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F10 ), std::bind( &message, std::ref( rx ), "<C-F10>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F11 ), std::bind( &message, std::ref( rx ), "<C-F11>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::F12 ), std::bind( &message, std::ref( rx ), "<C-F12>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::TAB ), std::bind( &message, std::ref( rx ), "<S-Tab>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::HOME ), std::bind( &message, std::ref( rx ), "<C-Home>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::HOME ), std::bind( &message, std::ref( rx ), "<S-Home>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::END ), std::bind( &message, std::ref( rx ), "<C-End>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::END ), std::bind( &message, std::ref( rx ), "<S-End>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::PAGE_UP ), std::bind( &message, std::ref( rx ), "<C-PgUp>", _1 ) );
+	rx.bind_key( Replxx::KEY::control( Replxx::KEY::PAGE_DOWN ), std::bind( &message, std::ref( rx ), "<C-PgDn>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::LEFT ), std::bind( &message, std::ref( rx ), "<S-Left>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::RIGHT ), std::bind( &message, std::ref( rx ), "<S-Right>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::UP ), std::bind( &message, std::ref( rx ), "<S-Up>", _1 ) );
+	rx.bind_key( Replxx::KEY::shift( Replxx::KEY::DOWN ), std::bind( &message, std::ref( rx ), "<S-Down>", _1 ) );
+
+	// display initial welcome message
+	std::cout
+		<< "Welcome to Replxx\n"
+		<< "Press 'tab' to view autocompletions\n"
+		<< "Type '.help' for help\n"
+		<< "Type '.quit' or '.exit' to exit\n\n";
+
+	// set the repl prompt
+	std::string prompt {"\x1b[1;32mreplxx\x1b[0m> "};
+
+	// main repl loop
+	if ( argc_ > 1 ) {
+		tick.start();
+	}
+	for (;;) {
+		// display the prompt and retrieve input from the user
+		char const* cinput{ nullptr };
+
+		do {
+			cinput = rx.input(prompt);
+		} while ( ( cinput == nullptr ) && ( errno == EAGAIN ) );
+
+		if (cinput == nullptr) {
+			break;
+		}
+
+		// change cinput into a std::string
+		// easier to manipulate
+		std::string input {cinput};
+
+		if (input.empty()) {
+			// user hit enter on an empty line
+
+			continue;
+
+		} else if (input.compare(0, 5, ".quit") == 0 || input.compare(0, 5, ".exit") == 0) {
+			// exit the repl
+
+			rx.history_add(input);
+			break;
+
+		} else if (input.compare(0, 5, ".help") == 0) {
+			// display the help output
+			std::cout
+				<< ".help\n\tdisplays the help output\n"
+				<< ".quit\n\texit the repl\n"
+				<< ".exit\n\texit the repl\n"
+				<< ".clear\n\tclears the screen\n"
+				<< ".history\n\tdisplays the history output\n"
+				<< ".prompt <str>\n\tset the repl prompt to <str>\n";
+
+			rx.history_add(input);
+			continue;
+
+		} else if (input.compare(0, 7, ".prompt") == 0) {
+			// set the repl prompt text
+			auto pos = input.find(" ");
+			if (pos == std::string::npos) {
+				std::cout << "Error: '.prompt' missing argument\n";
+			} else {
+				prompt = input.substr(pos + 1) + " ";
+			}
+
+			rx.history_add(input);
+			continue;
+
+		} else if (input.compare(0, 8, ".history") == 0) {
+			// display the current history
+			Replxx::HistoryScan hs( rx.history_scan() );
+			for ( int i( 0 ); hs.next(); ++ i ) {
+				std::cout << std::setw(4) << i << ": " << hs.get().text() << "\n";
+			}
+
+			rx.history_add(input);
+			continue;
+
+		} else if (input.compare(0, 6, ".merge") == 0) {
+			history_file = "replxx_history_alt.txt";
+
+			rx.history_add(input);
+			continue;
+
+		} else if (input.compare(0, 5, ".save") == 0) {
+			history_file = "replxx_history_alt.txt";
+			rx.history_save(history_file);
+			continue;
+
+		} else if (input.compare(0, 6, ".clear") == 0) {
+			// clear the screen
+			rx.clear_screen();
+
+			rx.history_add(input);
+			continue;
+
+		} else {
+			// default action
+			// echo the input
+
+			rx.print( "%s\n", input.c_str() );
+
+			rx.history_add( input );
+			continue;
+		}
+	}
+	if ( argc_ > 1 ) {
+		tick.stop();
+	}
+
+	// save the history
+	rx.history_sync(history_file);
+
+	std::cout << "\nExiting Replxx\n";
+
+	return 0;
+}

third-party/replxx/examples/util.c

@@ -0,0 +1,34 @@
+#include <string.h>
+
+int utf8str_codepoint_len( char const* s, int utf8len ) {
+	int codepointLen = 0;
+	unsigned char m4 = 128 + 64 + 32 + 16;
+	unsigned char m3 = 128 + 64 + 32;
+	unsigned char m2 = 128 + 64;
+	for ( int i = 0; i < utf8len; ++ i, ++ codepointLen ) {
+		char c = s[i];
+		if ( ( c & m4 ) == m4 ) {
+			i += 3;
+		} else if ( ( c & m3 ) == m3 ) {
+			i += 2;
+		} else if ( ( c & m2 ) == m2 ) {
+			i += 1;
+		}
+	}
+	return ( codepointLen );
+}
+
+int context_len( char const* prefix ) {
+	char const wb[] = " \t\n\r\v\f-=+*&^%$#@!,./?<>;:`~'\"[]{}()\\|";
+	int i = (int)strlen( prefix ) - 1;
+	int cl = 0;
+	while ( i >= 0 ) {
+		if ( strchr( wb, prefix[i] ) != NULL ) {
+			break;
+		}
+		++ cl;
+		-- i;
+	}
+	return ( cl );
+}
+

third-party/replxx/examples/util.h

@@ -0,0 +1,13 @@
+#pragma once
+
+// strrpbrk would suffice but is not portable.
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+int context_len( char const* );
+int utf8str_codepoint_len( char const*, int );
+
+#ifdef __cplusplus
+}
+#endif

third-party/replxx/gen-coverage.sh

@@ -0,0 +1,22 @@
+#! /bin/sh
+
+rm -rf build
+mkdir -p build/debug
+cd build/debug
+
+cmake -DCMAKE_BUILD_TYPE=coverage ../../
+make
+
+cd ..
+
+lcov --base-directory .. --directory debug/CMakeFiles --capture --initial --output-file replxx-baseline.info
+
+cd ..
+./tests.py
+cd -
+
+lcov --base-directory .. --directory debug/CMakeFiles --capture --output-file replxx-test.info
+lcov --add-tracefile replxx-baseline.info --add-tracefile replxx-test.info --output-file replxx-total.info
+lcov --extract replxx-total.info '*/replxx/src/*' '*/replxx/include/*' --output-file replxx-coverage.info
+genhtml replxx-coverage.info --legend --num-spaces=2 --output-directory replxx-coverage-html
+

third-party/replxx/include/replxx.h

@@ -0,0 +1,567 @@
+/* linenoise.h -- guerrilla line editing library against the idea that a
+ * line editing lib needs to be 20,000 lines of C code.
+ *
+ * See linenoise.c for more information.
+ *
+ * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef __REPLXX_H
+#define __REPLXX_H
+
+#define REPLXX_VERSION "0.0.2"
+#define REPLXX_VERSION_MAJOR 0
+#define REPLXX_VERSION_MINOR 0
+
+#ifdef __cplusplus
+extern "C" {
+#endif
+
+/*
+ * For use in Windows DLLs:
+ *
+ * If you are building replxx into a DLL,
+ * unless you are using supplied CMake based build,
+ * ensure that 'REPLXX_BUILDING_DLL' is defined when
+ * building the DLL so that proper symbols are exported.
+ */
+#if defined( _WIN32 ) && ! defined( REPLXX_STATIC )
+#	ifdef REPLXX_BUILDING_DLL
+#		define REPLXX_IMPEXP __declspec( dllexport )
+#	else
+#		define REPLXX_IMPEXP __declspec( dllimport )
+#	endif
+#else
+#	define REPLXX_IMPEXP /**/
+#endif
+
+/*! \brief Color definitions to use in highlighter callbacks.
+ */
+typedef enum {
+	REPLXX_COLOR_BLACK         = 0,
+	REPLXX_COLOR_RED           = 1,
+	REPLXX_COLOR_GREEN         = 2,
+	REPLXX_COLOR_BROWN         = 3,
+	REPLXX_COLOR_BLUE          = 4,
+	REPLXX_COLOR_MAGENTA       = 5,
+	REPLXX_COLOR_CYAN          = 6,
+	REPLXX_COLOR_LIGHTGRAY     = 7,
+	REPLXX_COLOR_GRAY          = 8,
+	REPLXX_COLOR_BRIGHTRED     = 9,
+	REPLXX_COLOR_BRIGHTGREEN   = 10,
+	REPLXX_COLOR_YELLOW        = 11,
+	REPLXX_COLOR_BRIGHTBLUE    = 12,
+	REPLXX_COLOR_BRIGHTMAGENTA = 13,
+	REPLXX_COLOR_BRIGHTCYAN    = 14,
+	REPLXX_COLOR_WHITE         = 15,
+	REPLXX_COLOR_NORMAL        = REPLXX_COLOR_LIGHTGRAY,
+	REPLXX_COLOR_DEFAULT       = -1,
+	REPLXX_COLOR_ERROR         = -2
+} ReplxxColor;
+
+enum { REPLXX_KEY_BASE         = 0x0010ffff + 1 };
+enum { REPLXX_KEY_BASE_SHIFT   = 0x01000000 };
+enum { REPLXX_KEY_BASE_CONTROL = 0x02000000 };
+enum { REPLXX_KEY_BASE_META    = 0x04000000 };
+enum { REPLXX_KEY_ESCAPE       = 27 };
+enum { REPLXX_KEY_PAGE_UP      = REPLXX_KEY_BASE      + 1 };
+enum { REPLXX_KEY_PAGE_DOWN    = REPLXX_KEY_PAGE_UP   + 1 };
+enum { REPLXX_KEY_DOWN         = REPLXX_KEY_PAGE_DOWN + 1 };
+enum { REPLXX_KEY_UP           = REPLXX_KEY_DOWN      + 1 };
+enum { REPLXX_KEY_LEFT         = REPLXX_KEY_UP        + 1 };
+enum { REPLXX_KEY_RIGHT        = REPLXX_KEY_LEFT      + 1 };
+enum { REPLXX_KEY_HOME         = REPLXX_KEY_RIGHT     + 1 };
+enum { REPLXX_KEY_END          = REPLXX_KEY_HOME      + 1 };
+enum { REPLXX_KEY_DELETE       = REPLXX_KEY_END       + 1 };
+enum { REPLXX_KEY_INSERT       = REPLXX_KEY_DELETE    + 1 };
+enum { REPLXX_KEY_F1           = REPLXX_KEY_INSERT    + 1 };
+enum { REPLXX_KEY_F2           = REPLXX_KEY_F1        + 1 };
+enum { REPLXX_KEY_F3           = REPLXX_KEY_F2        + 1 };
+enum { REPLXX_KEY_F4           = REPLXX_KEY_F3        + 1 };
+enum { REPLXX_KEY_F5           = REPLXX_KEY_F4        + 1 };
+enum { REPLXX_KEY_F6           = REPLXX_KEY_F5        + 1 };
+enum { REPLXX_KEY_F7           = REPLXX_KEY_F6        + 1 };
+enum { REPLXX_KEY_F8           = REPLXX_KEY_F7        + 1 };
+enum { REPLXX_KEY_F9           = REPLXX_KEY_F8        + 1 };
+enum { REPLXX_KEY_F10          = REPLXX_KEY_F9        + 1 };
+enum { REPLXX_KEY_F11          = REPLXX_KEY_F10       + 1 };
+enum { REPLXX_KEY_F12          = REPLXX_KEY_F11       + 1 };
+enum { REPLXX_KEY_F13          = REPLXX_KEY_F12       + 1 };
+enum { REPLXX_KEY_F14          = REPLXX_KEY_F13       + 1 };
+enum { REPLXX_KEY_F15          = REPLXX_KEY_F14       + 1 };
+enum { REPLXX_KEY_F16          = REPLXX_KEY_F15       + 1 };
+enum { REPLXX_KEY_F17          = REPLXX_KEY_F16       + 1 };
+enum { REPLXX_KEY_F18          = REPLXX_KEY_F17       + 1 };
+enum { REPLXX_KEY_F19          = REPLXX_KEY_F18       + 1 };
+enum { REPLXX_KEY_F20          = REPLXX_KEY_F19       + 1 };
+enum { REPLXX_KEY_F21          = REPLXX_KEY_F20       + 1 };
+enum { REPLXX_KEY_F22          = REPLXX_KEY_F21       + 1 };
+enum { REPLXX_KEY_F23          = REPLXX_KEY_F22       + 1 };
+enum { REPLXX_KEY_F24          = REPLXX_KEY_F23       + 1 };
+enum { REPLXX_KEY_MOUSE        = REPLXX_KEY_F24       + 1 };
+enum { REPLXX_KEY_PASTE_START  = REPLXX_KEY_MOUSE     + 1 };
+enum { REPLXX_KEY_PASTE_FINISH = REPLXX_KEY_PASTE_START + 1 };
+
+#define REPLXX_KEY_SHIFT( key )   ( ( key ) | REPLXX_KEY_BASE_SHIFT )
+#define REPLXX_KEY_CONTROL( key ) ( ( key ) | REPLXX_KEY_BASE_CONTROL )
+#define REPLXX_KEY_META( key )    ( ( key ) | REPLXX_KEY_BASE_META )
+
+enum { REPLXX_KEY_BACKSPACE    = REPLXX_KEY_CONTROL( 'H' ) };
+enum { REPLXX_KEY_TAB          = REPLXX_KEY_CONTROL( 'I' ) };
+enum { REPLXX_KEY_ENTER        = REPLXX_KEY_CONTROL( 'M' ) };
+
+/*! \brief List of built-in actions that act upon user input.
+ */
+typedef enum {
+	REPLXX_ACTION_INSERT_CHARACTER,
+	REPLXX_ACTION_DELETE_CHARACTER_UNDER_CURSOR,
+	REPLXX_ACTION_DELETE_CHARACTER_LEFT_OF_CURSOR,
+	REPLXX_ACTION_KILL_TO_END_OF_LINE,
+	REPLXX_ACTION_KILL_TO_BEGINING_OF_LINE,
+	REPLXX_ACTION_KILL_TO_END_OF_WORD,
+	REPLXX_ACTION_KILL_TO_BEGINING_OF_WORD,
+	REPLXX_ACTION_KILL_TO_WHITESPACE_ON_LEFT,
+	REPLXX_ACTION_YANK,
+	REPLXX_ACTION_YANK_CYCLE,
+	REPLXX_ACTION_YANK_LAST_ARG,
+	REPLXX_ACTION_MOVE_CURSOR_TO_BEGINING_OF_LINE,
+	REPLXX_ACTION_MOVE_CURSOR_TO_END_OF_LINE,
+	REPLXX_ACTION_MOVE_CURSOR_ONE_WORD_LEFT,
+	REPLXX_ACTION_MOVE_CURSOR_ONE_WORD_RIGHT,
+	REPLXX_ACTION_MOVE_CURSOR_LEFT,
+	REPLXX_ACTION_MOVE_CURSOR_RIGHT,
+	REPLXX_ACTION_HISTORY_NEXT,
+	REPLXX_ACTION_HISTORY_PREVIOUS,
+	REPLXX_ACTION_HISTORY_FIRST,
+	REPLXX_ACTION_HISTORY_LAST,
+	REPLXX_ACTION_HISTORY_INCREMENTAL_SEARCH,
+	REPLXX_ACTION_HISTORY_COMMON_PREFIX_SEARCH,
+	REPLXX_ACTION_HINT_NEXT,
+	REPLXX_ACTION_HINT_PREVIOUS,
+	REPLXX_ACTION_CAPITALIZE_WORD,
+	REPLXX_ACTION_LOWERCASE_WORD,
+	REPLXX_ACTION_UPPERCASE_WORD,
+	REPLXX_ACTION_TRANSPOSE_CHARACTERS,
+	REPLXX_ACTION_TOGGLE_OVERWRITE_MODE,
+#ifndef _WIN32
+	REPLXX_ACTION_VERBATIM_INSERT,
+	REPLXX_ACTION_SUSPEND,
+#endif
+	REPLXX_ACTION_BRACKETED_PASTE,
+	REPLXX_ACTION_CLEAR_SCREEN,
+	REPLXX_ACTION_CLEAR_SELF,
+	REPLXX_ACTION_REPAINT,
+	REPLXX_ACTION_COMPLETE_LINE,
+	REPLXX_ACTION_COMPLETE_NEXT,
+	REPLXX_ACTION_COMPLETE_PREVIOUS,
+	REPLXX_ACTION_COMMIT_LINE,
+	REPLXX_ACTION_ABORT_LINE,
+	REPLXX_ACTION_SEND_EOF
+} ReplxxAction;
+
+/*! \brief Possible results of key-press handler actions.
+ */
+typedef enum {
+	REPLXX_ACTION_RESULT_CONTINUE, /*!< Continue processing user input. */
+	REPLXX_ACTION_RESULT_RETURN,   /*!< Return user input entered so far. */
+	REPLXX_ACTION_RESULT_BAIL      /*!< Stop processing user input, returns nullptr from the \e input() call. */
+} ReplxxActionResult;
+
+typedef struct ReplxxStateTag {
+	char const* text;
+	int cursorPosition;
+} ReplxxState;
+
+typedef struct Replxx Replxx;
+typedef struct ReplxxHistoryScan ReplxxHistoryScan;
+typedef struct ReplxxHistoryEntryTag {
+	char const* timestamp;
+	char const* text;
+} ReplxxHistoryEntry;
+
+/*! \brief Create Replxx library resource holder.
+ *
+ * Use replxx_end() to free resources acquired with this function.
+ *
+ * \return Replxx library resource holder.
+ */
+REPLXX_IMPEXP Replxx* replxx_init( void );
+
+/*! \brief Cleanup resources used by Replxx library.
+ *
+ * \param replxx - a Replxx library resource holder.
+ */
+REPLXX_IMPEXP void replxx_end( Replxx* replxx );
+
+/*! \brief Line modification callback type definition.
+ *
+ * User can observe and modify line contents (and cursor position)
+ * in response to changes to both introduced by the user through
+ * normal interactions.
+ *
+ * When callback returns Replxx updates current line content
+ * and current cursor position to the ones updated by the callback.
+ *
+ * \param line[in,out] - a R/W reference to an UTF-8 encoded input entered by the user so far.
+ * \param cursorPosition[in,out] - a R/W reference to current cursor position.
+ * \param userData - pointer to opaque user data block.
+ */
+typedef void (replxx_modify_callback_t)(char** input, int* contextLen, void* userData);
+
+/*! \brief Register modify callback.
+ *
+ * \param fn - user defined callback function.
+ * \param userData - pointer to opaque user data block to be passed into each invocation of the callback.
+ */
+REPLXX_IMPEXP void replxx_set_modify_callback( Replxx*, replxx_modify_callback_t* fn, void* userData );
+
+/*! \brief Highlighter callback type definition.
+ *
+ * If user want to have colorful input she must simply install highlighter callback.
+ * The callback would be invoked by the library after each change to the input done by
+ * the user. After callback returns library uses data from colors buffer to colorize
+ * displayed user input.
+ *
+ * \e size of \e colors buffer is equal to number of code points in user \e input
+ * which will be different from simple `strlen( input )`!
+ *
+ * \param input - an UTF-8 encoded input entered by the user so far.
+ * \param colors - output buffer for color information.
+ * \param size - size of output buffer for color information.
+ * \param userData - pointer to opaque user data block.
+ */
+typedef void (replxx_highlighter_callback_t)(char const* input, ReplxxColor* colors, int size, void* userData);
+
+/*! \brief Register highlighter callback.
+ *
+ * \param fn - user defined callback function.
+ * \param userData - pointer to opaque user data block to be passed into each invocation of the callback.
+ */
+REPLXX_IMPEXP void replxx_set_highlighter_callback( Replxx*, replxx_highlighter_callback_t* fn, void* userData );
+
+typedef struct replxx_completions replxx_completions;
+
+/*! \brief Completions callback type definition.
+ *
+ * \e contextLen is counted in Unicode code points (not in bytes!).
+ *
+ * For user input:
+ * if ( obj.me
+ *
+ * input == "if ( obj.me"
+ * contextLen == 2 (depending on \e replxx_set_word_break_characters())
+ *
+ * Client application is free to update \e contextLen to be 6 (or any other non-negative
+ * number not greater than the number of code points in input) if it makes better sense
+ * for given client application semantics.
+ *
+ * \param input - UTF-8 encoded input entered by the user until current cursor position.
+ * \param completions - pointer to opaque list of user completions.
+ * \param contextLen[in,out] - length of the additional context to provide while displaying completions.
+ * \param userData - pointer to opaque user data block.
+ */
+typedef void(replxx_completion_callback_t)(const char* input, replxx_completions* completions, int* contextLen, void* userData);
+
+/*! \brief Register completion callback.
+ *
+ * \param fn - user defined callback function.
+ * \param userData - pointer to opaque user data block to be passed into each invocation of the callback.
+ */
+REPLXX_IMPEXP void replxx_set_completion_callback( Replxx*, replxx_completion_callback_t* fn, void* userData );
+
+/*! \brief Add another possible completion for current user input.
+ *
+ * \param completions - pointer to opaque list of user completions.
+ * \param str - UTF-8 encoded completion string.
+ */
+REPLXX_IMPEXP void replxx_add_completion( replxx_completions* completions, const char* str );
+
+/*! \brief Add another possible completion for current user input.
+ *
+ * \param completions - pointer to opaque list of user completions.
+ * \param str - UTF-8 encoded completion string.
+ * \param color - a color for the completion.
+ */
+REPLXX_IMPEXP void replxx_add_color_completion( replxx_completions* completions, const char* str, ReplxxColor color );
+
+typedef struct replxx_hints replxx_hints;
+
+/*! \brief Hints callback type definition.
+ *
+ * \e contextLen is counted in Unicode code points (not in bytes!).
+ *
+ * For user input:
+ * if ( obj.me
+ *
+ * input == "if ( obj.me"
+ * contextLen == 2 (depending on \e replxx_set_word_break_characters())
+ *
+ * Client application is free to update \e contextLen to be 6 (or any other non-negative
+ * number not greater than the number of code points in input) if it makes better sense
+ * for given client application semantics.
+ *
+ * \param input - UTF-8 encoded input entered by the user until current cursor position.
+ * \param hints - pointer to opaque list of possible hints.
+ * \param contextLen[in,out] - length of the additional context to provide while displaying hints.
+ * \param color - a color used for displaying hints.
+ * \param userData - pointer to opaque user data block.
+ */
+typedef void(replxx_hint_callback_t)(const char* input, replxx_hints* hints, int* contextLen, ReplxxColor* color, void* userData);
+
+/*! \brief Register hints callback.
+ *
+ * \param fn - user defined callback function.
+ * \param userData - pointer to opaque user data block to be passed into each invocation of the callback.
+ */
+REPLXX_IMPEXP void replxx_set_hint_callback( Replxx*, replxx_hint_callback_t* fn, void* userData );
+
+/*! \brief Key press handler type definition.
+ *
+ * \param code - the key code replxx got from terminal.
+ * \return Decision on how should input() behave after this key handler returns.
+ */
+typedef ReplxxActionResult (key_press_handler_t)( int code, void* userData );
+
+/*! \brief Add another possible hint for current user input.
+ *
+ * \param hints - pointer to opaque list of hints.
+ * \param str - UTF-8 encoded hint string.
+ */
+REPLXX_IMPEXP void replxx_add_hint( replxx_hints* hints, const char* str );
+
+/*! \brief Read line of user input.
+ *
+ * Returned pointer is managed by the library and is not to be freed in the client.
+ *
+ * \param prompt - prompt to be displayed before getting user input.
+ * \return An UTF-8 encoded input given by the user (or nullptr on EOF).
+ */
+REPLXX_IMPEXP char const* replxx_input( Replxx*, const char* prompt );
+
+/*! \brief Get current state data.
+ *
+ * This call is intended to be used in handlers.
+ *
+ * \param state - buffer for current state of the model.
+ */
+REPLXX_IMPEXP void replxx_get_state( Replxx*, ReplxxState* state );
+
+/*! \brief Set new state data.
+ *
+ * This call is intended to be used in handlers.
+ *
+ * \param state - new state of the model.
+ */
+REPLXX_IMPEXP void replxx_set_state( Replxx*, ReplxxState* state );
+
+/*! \brief Print formatted string to standard output.
+ *
+ * This function ensures proper handling of ANSI escape sequences
+ * contained in printed data, which is especially useful on Windows
+ * since Unixes handle them correctly out of the box.
+ *
+ * \param fmt - printf style format.
+ */
+REPLXX_IMPEXP int replxx_print( Replxx*, char const* fmt, ... );
+
+/*! \brief Prints a char array with the given length to standard output.
+ *
+ * \copydetails print
+ *
+ * \param str - The char array to print.
+ * \param length - The length of the array.
+ */
+REPLXX_IMPEXP int replxx_write( Replxx*, char const* str, int length );
+
+/*! \brief Schedule an emulated key press event.
+ *
+ * \param code - key press code to be emulated.
+ */
+REPLXX_IMPEXP void replxx_emulate_key_press( Replxx*, int unsigned code );
+
+/*! \brief Invoke built-in action handler.
+ *
+ * \pre This function can be called only from key-press handler.
+ *
+ * \param action - a built-in action to invoke.
+ * \param code - a supplementary key-code to consume by built-in action handler.
+ * \return The action result informing the replxx what shall happen next.
+ */
+REPLXX_IMPEXP ReplxxActionResult replxx_invoke( Replxx*, ReplxxAction action, int unsigned code );
+
+/*! \brief Bind user defined action to handle given key-press event.
+ *
+ * \param code - handle this key-press event with following handler.
+ * \param handler - use this handler to handle key-press event.
+ * \param userData - supplementary user data passed to invoked handlers.
+ */
+REPLXX_IMPEXP void replxx_bind_key( Replxx*, int code, key_press_handler_t handler, void* userData );
+
+/*! \brief Bind internal `replxx` action (by name) to handle given key-press event.
+ *
+ * Action names are the same as unique part of names of ReplxxAction enumerations
+ * but in lower case, e.g.: an action for recalling previous history line
+ * is \e REPLXX_ACTION_HISTORY_PREVIOUS so action name to be used in this
+ * interface for the same effect is "history_previous".
+ *
+ * \param code - handle this key-press event with following handler.
+ * \param actionName - name of internal action to be invoked on key press.
+ * \return -1 if invalid action name was used, 0 otherwise.
+ */
+int replxx_bind_key_internal( Replxx*, int code, char const* actionName );
+
+REPLXX_IMPEXP void replxx_set_preload_buffer( Replxx*, const char* preloadText );
+
+REPLXX_IMPEXP void replxx_history_add( Replxx*, const char* line );
+REPLXX_IMPEXP int replxx_history_size( Replxx* );
+
+/*! \brief Set set of word break characters.
+ *
+ * This setting influences word based cursor movement and line editing capabilities.
+ *
+ * \param wordBreakers - 7-bit ASCII set of word breaking characters.
+ */
+REPLXX_IMPEXP void replxx_set_word_break_characters( Replxx*, char const* wordBreakers );
+
+/*! \brief How many completions should trigger pagination.
+ */
+REPLXX_IMPEXP void replxx_set_completion_count_cutoff( Replxx*, int count );
+
+/*! \brief Set maximum number of displayed hint rows.
+ */
+REPLXX_IMPEXP void replxx_set_max_hint_rows( Replxx*, int count );
+
+/*! \brief Set a delay before hint are shown after user stopped typing..
+ *
+ * \param milliseconds - a number of milliseconds to wait before showing hints.
+ */
+REPLXX_IMPEXP void replxx_set_hint_delay( Replxx*, int milliseconds );
+
+/*! \brief Set tab completion behavior.
+ *
+ * \param val - use double tab to invoke completions (if != 0).
+ */
+REPLXX_IMPEXP void replxx_set_double_tab_completion( Replxx*, int val );
+
+/*! \brief Set tab completion behavior.
+ *
+ * \param val - invoke completion even if user input is empty (if != 0).
+ */
+REPLXX_IMPEXP void replxx_set_complete_on_empty( Replxx*, int val );
+
+/*! \brief Set tab completion behavior.
+ *
+ * \param val - beep if completion is ambiguous (if != 0).
+ */
+REPLXX_IMPEXP void replxx_set_beep_on_ambiguous_completion( Replxx*, int val );
+
+/*! \brief Set complete next/complete previous behavior.
+ *
+ * COMPLETE_NEXT/COMPLETE_PREVIOUS actions have two modes of operations,
+ * in case when a partial completion is possible complete only partial part (`false` setting)
+ * or complete first proposed completion fully (`true` setting).
+ * The default is to complete fully (a `true` setting - complete immediately).
+ *
+ * \param val - complete immediately.
+ */
+REPLXX_IMPEXP void replxx_set_immediate_completion( Replxx*, int val );
+
+/*! \brief Set history duplicate entries behaviour.
+ *
+ * \param val - should history contain only unique entries?
+ */
+REPLXX_IMPEXP void replxx_set_unique_history( Replxx*, int val );
+
+/*! \brief Disable output coloring.
+ *
+ * \param val - if set to non-zero disable output colors.
+ */
+REPLXX_IMPEXP void replxx_set_no_color( Replxx*, int val );
+
+/*! \brief Set maximum number of entries in history list.
+ */
+REPLXX_IMPEXP void replxx_set_max_history_size( Replxx*, int len );
+REPLXX_IMPEXP ReplxxHistoryScan* replxx_history_scan_start( Replxx* );
+REPLXX_IMPEXP void replxx_history_scan_stop( Replxx*, ReplxxHistoryScan* );
+REPLXX_IMPEXP int replxx_history_scan_next( Replxx*, ReplxxHistoryScan*, ReplxxHistoryEntry* );
+
+/*! \brief Synchronize REPL's history with given file.
+ *
+ * Synchronizing means loading existing history from given file,
+ * merging it with current history sorted by timestamps,
+ * saving merged version to given file,
+ * keeping merged version as current REPL's history.
+ *
+ * This call is an equivalent of calling:
+ * replxx_history_save( rx, "some-file" );
+ * replxx_history_load( rx, "some-file" );
+ *
+ * \param filename - a path to the file with which REPL's current history should be synchronized.
+ * \return 0 iff history file was successfully created, -1 otherwise.
+ */
+REPLXX_IMPEXP int replxx_history_sync( Replxx*, const char* filename );
+
+/*! \brief Save REPL's history into given file.
+ *
+ * Saving means loading existing history from given file,
+ * merging it with current history sorted by timestamps,
+ * saving merged version to given file,
+ * keeping original (NOT merged) version as current REPL's history.
+ *
+ * \param filename - a path to the file where REPL's history should be saved.
+ * \return 0 iff history file was successfully created, -1 otherwise.
+ */
+REPLXX_IMPEXP int replxx_history_save( Replxx*, const char* filename );
+
+/*! \brief Load REPL's history from given file.
+ *
+ * \param filename - a path to the file which contains REPL's history that should be loaded.
+ * \return 0 iff history file was successfully opened, -1 otherwise.
+ */
+REPLXX_IMPEXP int replxx_history_load( Replxx*, const char* filename );
+
+/*! \brief Clear REPL's in-memory history.
+ */
+REPLXX_IMPEXP void replxx_history_clear( Replxx* );
+REPLXX_IMPEXP void replxx_clear_screen( Replxx* );
+#ifdef __REPLXX_DEBUG__
+void replxx_debug_dump_print_codes(void);
+#endif
+/* the following is extension to the original linenoise API */
+REPLXX_IMPEXP int replxx_install_window_change_handler( Replxx* );
+REPLXX_IMPEXP void replxx_enable_bracketed_paste( Replxx* );
+REPLXX_IMPEXP void replxx_disable_bracketed_paste( Replxx* );
+
+#ifdef __cplusplus
+}
+#endif
+
+#endif /* __REPLXX_H */
+

third-party/replxx/include/replxx.hxx

@@ -0,0 +1,607 @@
+/*
+ * Copyright (c) 2017-2018, Marcin Konarski (amok at codestation.org)
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef HAVE_REPLXX_HXX_INCLUDED
+#define HAVE_REPLXX_HXX_INCLUDED 1
+
+#include <memory>
+#include <vector>
+#include <string>
+#include <functional>
+
+/*
+ * For use in Windows DLLs:
+ *
+ * If you are building replxx into a DLL,
+ * unless you are using supplied CMake based build,
+ * ensure that 'REPLXX_BUILDING_DLL' is defined when
+ * building the DLL so that proper symbols are exported.
+ */
+#if defined( _WIN32 ) && ! defined( REPLXX_STATIC )
+#	ifdef REPLXX_BUILDING_DLL
+#		define REPLXX_IMPEXP __declspec( dllexport )
+#	else
+#		define REPLXX_IMPEXP __declspec( dllimport )
+#	endif
+#else
+#	define REPLXX_IMPEXP /**/
+#endif
+
+#ifdef ERROR
+enum { ERROR_BB1CA97EC761FC37101737BA0AA2E7C5 = ERROR };
+#undef ERROR
+enum { ERROR = ERROR_BB1CA97EC761FC37101737BA0AA2E7C5 };
+#endif
+#ifdef DELETE
+enum { DELETE_32F68A60CEF40FAEDBC6AF20298C1A1E = DELETE };
+#undef DELETE
+enum { DELETE = DELETE_32F68A60CEF40FAEDBC6AF20298C1A1E };
+#endif
+
+namespace replxx {
+
+class REPLXX_IMPEXP Replxx {
+public:
+	enum class Color {
+		BLACK         = 0,
+		RED           = 1,
+		GREEN         = 2,
+		BROWN         = 3,
+		BLUE          = 4,
+		MAGENTA       = 5,
+		CYAN          = 6,
+		LIGHTGRAY     = 7,
+		GRAY          = 8,
+		BRIGHTRED     = 9,
+		BRIGHTGREEN   = 10,
+		YELLOW        = 11,
+		BRIGHTBLUE    = 12,
+		BRIGHTMAGENTA = 13,
+		BRIGHTCYAN    = 14,
+		WHITE         = 15,
+		NORMAL        = LIGHTGRAY,
+		DEFAULT       = -1,
+		ERROR         = -2
+	};
+	struct KEY {
+		static char32_t const BASE         = 0x0010ffff + 1;
+		static char32_t const BASE_SHIFT   = 0x01000000;
+		static char32_t const BASE_CONTROL = 0x02000000;
+		static char32_t const BASE_META    = 0x04000000;
+		static char32_t const ESCAPE       = 27;
+		static char32_t const PAGE_UP      = BASE      + 1;
+		static char32_t const PAGE_DOWN    = PAGE_UP   + 1;
+		static char32_t const DOWN         = PAGE_DOWN + 1;
+		static char32_t const UP           = DOWN      + 1;
+		static char32_t const LEFT         = UP        + 1;
+		static char32_t const RIGHT        = LEFT      + 1;
+		static char32_t const HOME         = RIGHT     + 1;
+		static char32_t const END          = HOME      + 1;
+		static char32_t const DELETE       = END       + 1;
+		static char32_t const INSERT       = DELETE    + 1;
+		static char32_t const F1           = INSERT    + 1;
+		static char32_t const F2           = F1        + 1;
+		static char32_t const F3           = F2        + 1;
+		static char32_t const F4           = F3        + 1;
+		static char32_t const F5           = F4        + 1;
+		static char32_t const F6           = F5        + 1;
+		static char32_t const F7           = F6        + 1;
+		static char32_t const F8           = F7        + 1;
+		static char32_t const F9           = F8        + 1;
+		static char32_t const F10          = F9        + 1;
+		static char32_t const F11          = F10       + 1;
+		static char32_t const F12          = F11       + 1;
+		static char32_t const F13          = F12       + 1;
+		static char32_t const F14          = F13       + 1;
+		static char32_t const F15          = F14       + 1;
+		static char32_t const F16          = F15       + 1;
+		static char32_t const F17          = F16       + 1;
+		static char32_t const F18          = F17       + 1;
+		static char32_t const F19          = F18       + 1;
+		static char32_t const F20          = F19       + 1;
+		static char32_t const F21          = F20       + 1;
+		static char32_t const F22          = F21       + 1;
+		static char32_t const F23          = F22       + 1;
+		static char32_t const F24          = F23       + 1;
+		static char32_t const MOUSE        = F24       + 1;
+		static char32_t const PASTE_START  = MOUSE     + 1;
+		static char32_t const PASTE_FINISH = PASTE_START + 1;
+		static constexpr char32_t shift( char32_t key_ ) {
+			return ( key_ | BASE_SHIFT );
+		}
+		static constexpr char32_t control( char32_t key_ ) {
+			return ( key_ | BASE_CONTROL );
+		}
+		static constexpr char32_t meta( char32_t key_ ) {
+			return ( key_ | BASE_META );
+		}
+		static char32_t const BACKSPACE    = 'H' | BASE_CONTROL;
+		static char32_t const TAB          = 'I' | BASE_CONTROL;
+		static char32_t const ENTER        = 'M' | BASE_CONTROL;
+	};
+	/*! \brief List of built-in actions that act upon user input.
+	 */
+	enum class ACTION {
+		INSERT_CHARACTER,
+		DELETE_CHARACTER_UNDER_CURSOR,
+		DELETE_CHARACTER_LEFT_OF_CURSOR,
+		KILL_TO_END_OF_LINE,
+		KILL_TO_BEGINING_OF_LINE,
+		KILL_TO_END_OF_WORD,
+		KILL_TO_BEGINING_OF_WORD,
+		KILL_TO_WHITESPACE_ON_LEFT,
+		YANK,
+		YANK_CYCLE,
+		YANK_LAST_ARG,
+		MOVE_CURSOR_TO_BEGINING_OF_LINE,
+		MOVE_CURSOR_TO_END_OF_LINE,
+		MOVE_CURSOR_ONE_WORD_LEFT,
+		MOVE_CURSOR_ONE_WORD_RIGHT,
+		MOVE_CURSOR_LEFT,
+		MOVE_CURSOR_RIGHT,
+		HISTORY_NEXT,
+		HISTORY_PREVIOUS,
+		HISTORY_FIRST,
+		HISTORY_LAST,
+		HISTORY_INCREMENTAL_SEARCH,
+		HISTORY_COMMON_PREFIX_SEARCH,
+		HINT_NEXT,
+		HINT_PREVIOUS,
+		CAPITALIZE_WORD,
+		LOWERCASE_WORD,
+		UPPERCASE_WORD,
+		TRANSPOSE_CHARACTERS,
+		TOGGLE_OVERWRITE_MODE,
+#ifndef _WIN32
+		VERBATIM_INSERT,
+		SUSPEND,
+#endif
+		BRACKETED_PASTE,
+		CLEAR_SCREEN,
+		CLEAR_SELF,
+		REPAINT,
+		COMPLETE_LINE,
+		COMPLETE_NEXT,
+		COMPLETE_PREVIOUS,
+		COMMIT_LINE,
+		ABORT_LINE,
+		SEND_EOF
+	};
+	/*! \brief Possible results of key-press handler actions.
+	 */
+	enum class ACTION_RESULT {
+		CONTINUE, /*!< Continue processing user input. */
+		RETURN,   /*!< Return user input entered so far. */
+		BAIL      /*!< Stop processing user input, returns nullptr from the \e input() call. */
+	};
+	typedef std::vector<Color> colors_t;
+	class Completion {
+		std::string _text;
+		Color _color;
+	public:
+		Completion( char const* text_ )
+			: _text( text_ )
+			, _color( Color::DEFAULT ) {
+		}
+		Completion( std::string const& text_ )
+			: _text( text_ )
+			, _color( Color::DEFAULT ) {
+		}
+		Completion( std::string const& text_, Color color_ )
+			: _text( text_ )
+			, _color( color_ ) {
+		}
+		std::string const& text( void ) const {
+			return ( _text );
+		}
+		Color color( void ) const {
+			return ( _color );
+		}
+	};
+	typedef std::vector<Completion> completions_t;
+	class HistoryEntry {
+		std::string _timestamp;
+		std::string _text;
+	public:
+		HistoryEntry( std::string const& timestamp_, std::string const& text_ )
+			: _timestamp( timestamp_ )
+			, _text( text_ ) {
+		}
+		std::string const& timestamp( void ) const {
+			return ( _timestamp );
+		}
+		std::string const& text( void ) const {
+			return ( _text );
+		}
+	};
+	class HistoryScanImpl;
+	class HistoryScan {
+	public:
+		typedef std::unique_ptr<HistoryScanImpl, void (*)( HistoryScanImpl* )> impl_t;
+	private:
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4251)
+#endif
+		impl_t _impl;
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+	public:
+		HistoryScan( impl_t );
+		HistoryScan( HistoryScan&& ) = default;
+		HistoryScan& operator = ( HistoryScan&& ) = default;
+		bool next( void );
+		HistoryEntry const& get( void ) const;
+	private:
+		HistoryScan( HistoryScan const& ) = delete;
+		HistoryScan& operator = ( HistoryScan const& ) = delete;
+	};
+	typedef std::vector<std::string> hints_t;
+
+	/*! \brief Line modification callback type definition.
+	 *
+	 * User can observe and modify line contents (and cursor position)
+	 * in response to changes to both introduced by the user through
+	 * normal interactions.
+	 *
+	 * When callback returns Replxx updates current line content
+	 * and current cursor position to the ones updated by the callback.
+	 *
+	 * \param line[in,out] - a R/W reference to an UTF-8 encoded input entered by the user so far.
+	 * \param cursorPosition[in,out] - a R/W reference to current cursor position.
+	 */
+	typedef std::function<void ( std::string& line, int& cursorPosition )> modify_callback_t;
+
+	/*! \brief Completions callback type definition.
+	 *
+	 * \e contextLen is counted in Unicode code points (not in bytes!).
+	 *
+	 * For user input:
+	 * if ( obj.me
+	 *
+	 * input == "if ( obj.me"
+	 * contextLen == 2 (depending on \e set_word_break_characters())
+	 *
+	 * Client application is free to update \e contextLen to be 6 (or any other non-negative
+	 * number not greater than the number of code points in input) if it makes better sense
+	 * for given client application semantics.
+	 *
+	 * \param input - UTF-8 encoded input entered by the user until current cursor position.
+	 * \param[in,out] contextLen - length of the additional context to provide while displaying completions.
+	 * \return A list of user completions.
+	 */
+	typedef std::function<completions_t ( std::string const& input, int& contextLen )> completion_callback_t;
+
+	/*! \brief Highlighter callback type definition.
+	 *
+	 * If user want to have colorful input she must simply install highlighter callback.
+	 * The callback would be invoked by the library after each change to the input done by
+	 * the user. After callback returns library uses data from colors buffer to colorize
+	 * displayed user input.
+	 *
+	 * Size of \e colors buffer is equal to number of code points in user \e input
+	 * which will be different from simple `input.lenght()`!
+	 *
+	 * \param input - an UTF-8 encoded input entered by the user so far.
+	 * \param colors - output buffer for color information.
+	 */
+	typedef std::function<void ( std::string const& input, colors_t& colors )> highlighter_callback_t;
+
+	/*! \brief Hints callback type definition.
+	 *
+	 * \e contextLen is counted in Unicode code points (not in bytes!).
+	 *
+	 * For user input:
+	 * if ( obj.me
+	 *
+	 * input == "if ( obj.me"
+	 * contextLen == 2 (depending on \e set_word_break_characters())
+	 *
+	 * Client application is free to update \e contextLen to be 6 (or any other non-negative
+	 * number not greater than the number of code points in input) if it makes better sense
+	 * for given client application semantics.
+	 *
+	 * \param input - UTF-8 encoded input entered by the user until current cursor position.
+	 * \param contextLen[in,out] - length of the additional context to provide while displaying hints.
+	 * \param color - a color used for displaying hints.
+	 * \return A list of possible hints.
+	 */
+	typedef std::function<hints_t ( std::string const& input, int& contextLen, Color& color )> hint_callback_t;
+
+	/*! \brief Key press handler type definition.
+	 *
+	 * \param code - the key code replxx got from terminal.
+	 * \return Decision on how should input() behave after this key handler returns.
+	 */
+	typedef std::function<ACTION_RESULT ( char32_t code )> key_press_handler_t;
+
+	struct State {
+		char const* _text;
+		int _cursorPosition;
+		State( char const* text_, int cursorPosition_ = -1 )
+			: _text( text_ )
+			, _cursorPosition( cursorPosition_ ) {
+		}
+		State( State const& ) = default;
+		State& operator = ( State const& ) = default;
+		char const* text( void ) const {
+			return ( _text );
+		}
+		int cursor_position( void ) const {
+			return ( _cursorPosition );
+		}
+	};
+
+	class ReplxxImpl;
+private:
+	typedef std::unique_ptr<ReplxxImpl, void (*)( ReplxxImpl* )> impl_t;
+#ifdef _MSC_VER
+#pragma warning(push)
+#pragma warning(disable:4251)
+#endif
+	impl_t _impl;
+#ifdef _MSC_VER
+#pragma warning(pop)
+#endif
+
+public:
+	Replxx( void );
+	Replxx( Replxx&& ) = default;
+	Replxx& operator = ( Replxx&& ) = default;
+
+	/*! \brief Register modify callback.
+	 *
+	 * \param fn - user defined callback function.
+	 */
+	void set_modify_callback( modify_callback_t const& fn );
+
+	/*! \brief Register completion callback.
+	 *
+	 * \param fn - user defined callback function.
+	 */
+	void set_completion_callback( completion_callback_t const& fn );
+
+	/*! \brief Register highlighter callback.
+	 *
+	 * \param fn - user defined callback function.
+	 */
+	void set_highlighter_callback( highlighter_callback_t const& fn );
+
+	/*! \brief Register hints callback.
+	 *
+	 * \param fn - user defined callback function.
+	 */
+	void set_hint_callback( hint_callback_t const& fn );
+
+	/*! \brief Read line of user input.
+	 *
+	 * Returned pointer is managed by the library and is not to be freed in the client.
+	 *
+	 * \param prompt - prompt to be displayed before getting user input.
+	 * \return An UTF-8 encoded input given by the user (or nullptr on EOF).
+	 */
+	char const* input( std::string const& prompt );
+
+	/*! \brief Get current state data.
+	 *
+	 * This call is intended to be used in handlers.
+	 *
+	 * \return Current state of the model.
+	 */
+	State get_state( void ) const;
+
+	/*! \brief Set new state data.
+	 *
+	 * This call is intended to be used in handlers.
+	 *
+	 * \param state - new state of the model.
+	 */
+	void set_state( State const& state );
+
+	/*! \brief Print formatted string to standard output.
+	 *
+	 * This function ensures proper handling of ANSI escape sequences
+	 * contained in printed data, which is especially useful on Windows
+	 * since Unixes handle them correctly out of the box.
+	 *
+	 * \param fmt - printf style format.
+	 */
+	void print( char const* fmt, ... );
+
+	/*! \brief Prints a char array with the given length to standard output.
+	 *
+	 * \copydetails print
+	 *
+	 * \param str - The char array to print.
+	 * \param length - The length of the array.
+	 */
+	void write( char const* str, int length );
+
+	/*! \brief Schedule an emulated key press event.
+	 *
+	 * \param code - key press code to be emulated.
+	 */
+	void emulate_key_press( char32_t code );
+
+	/*! \brief Invoke built-in action handler.
+	 *
+	 * \pre This method can be called only from key-press handler.
+	 *
+	 * \param action - a built-in action to invoke.
+	 * \param code - a supplementary key-code to consume by built-in action handler.
+	 * \return The action result informing the replxx what shall happen next.
+	 */
+	ACTION_RESULT invoke( ACTION action, char32_t code );
+
+	/*! \brief Bind user defined action to handle given key-press event.
+	 *
+	 * \param code - handle this key-press event with following handler.
+	 * \param handle - use this handler to handle key-press event.
+	 */
+	void bind_key( char32_t code, key_press_handler_t handler );
+
+	/*! \brief Bind internal `replxx` action (by name) to handle given key-press event.
+	 *
+	 * Action names are the same as names of Replxx::ACTION enumerations
+	 * but in lower case, e.g.: an action for recalling previous history line
+	 * is \e Replxx::ACTION::HISTORY_PREVIOUS so action name to be used in this
+	 * interface for the same effect is "history_previous".
+	 *
+	 * \param code - handle this key-press event with following handler.
+	 * \param actionName - name of internal action to be invoked on key press.
+	 */
+	void bind_key_internal( char32_t code, char const* actionName );
+
+	void history_add( std::string const& line );
+
+	/*! \brief Synchronize REPL's history with given file.
+	 *
+	 * Synchronizing means loading existing history from given file,
+	 * merging it with current history sorted by timestamps,
+	 * saving merged version to given file,
+	 * keeping merged version as current REPL's history.
+	 *
+	 * This call is an equivalent of calling:
+	 * history_save( "some-file" );
+	 * history_load( "some-file" );
+	 *
+	 * \param filename - a path to the file with which REPL's current history should be synchronized.
+	 * \return True iff history file was successfully created.
+	 */
+	bool history_sync( std::string const& filename );
+
+	/*! \brief Save REPL's history into given file.
+	 *
+	 * Saving means loading existing history from given file,
+	 * merging it with current history sorted by timestamps,
+	 * saving merged version to given file,
+	 * keeping original (NOT merged) version as current REPL's history.
+	 *
+	 * \param filename - a path to the file where REPL's history should be saved.
+	 * \return True iff history file was successfully created.
+	 */
+	bool history_save( std::string const& filename );
+
+	/*! \brief Load REPL's history from given file.
+	 *
+	 * \param filename - a path to the file which contains REPL's history that should be loaded.
+	 * \return True iff history file was successfully opened.
+	 */
+	bool history_load( std::string const& filename );
+
+	/*! \brief Clear REPL's in-memory history.
+	 */
+	void history_clear( void );
+	int history_size( void ) const;
+	HistoryScan history_scan( void ) const;
+
+	void set_preload_buffer( std::string const& preloadText );
+
+	/*! \brief Set set of word break characters.
+	 *
+	 * This setting influences word based cursor movement and line editing capabilities.
+	 *
+	 * \param wordBreakers - 7-bit ASCII set of word breaking characters.
+	 */
+	void set_word_break_characters( char const* wordBreakers );
+
+	/*! \brief How many completions should trigger pagination.
+	 */
+	void set_completion_count_cutoff( int count );
+
+	/*! \brief Set maximum number of displayed hint rows.
+	 */
+	void set_max_hint_rows( int count );
+
+	/*! \brief Set a delay before hint are shown after user stopped typing..
+	 *
+	 * \param milliseconds - a number of milliseconds to wait before showing hints.
+	 */
+	void set_hint_delay( int milliseconds );
+
+	/*! \brief Set tab completion behavior.
+	 *
+	 * \param val - use double tab to invoke completions.
+	 */
+	void set_double_tab_completion( bool val );
+
+	/*! \brief Set tab completion behavior.
+	 *
+	 * \param val - invoke completion even if user input is empty.
+	 */
+	void set_complete_on_empty( bool val );
+
+	/*! \brief Set tab completion behavior.
+	 *
+	 * \param val - beep if completion is ambiguous.
+	 */
+	void set_beep_on_ambiguous_completion( bool val );
+
+	/*! \brief Set complete next/complete previous behavior.
+	 *
+	 * COMPLETE_NEXT/COMPLETE_PREVIOUS actions have two modes of operations,
+	 * in case when a partial completion is possible complete only partial part (`false` setting)
+	 * or complete first proposed completion fully (`true` setting).
+	 * The default is to complete fully (a `true` setting - complete immediately).
+	 *
+	 * \param val - complete immediately.
+	 */
+	void set_immediate_completion( bool val );
+
+	/*! \brief Set history duplicate entries behaviour.
+	 *
+	 * \param val - should history contain only unique entries?
+	 */
+	void set_unique_history( bool val );
+
+	/*! \brief Disable output coloring.
+	 *
+	 * \param val - if set to non-zero disable output colors.
+	 */
+	void set_no_color( bool val );
+
+	/*! \brief Set maximum number of entries in history list.
+	 */
+	void set_max_history_size( int len );
+	void clear_screen( void );
+	int install_window_change_handler( void );
+	void enable_bracketed_paste( void );
+	void disable_bracketed_paste( void );
+
+private:
+	Replxx( Replxx const& ) = delete;
+	Replxx& operator = ( Replxx const& ) = delete;
+};
+
+}
+
+#endif /* HAVE_REPLXX_HXX_INCLUDED */
+

third-party/replxx/make.ps1

@@ -0,0 +1,80 @@
+param (
+	[Parameter(Mandatory=$True)] [string]$target,
+	[Parameter(Mandatory=$False)] [string]$prefix = "",
+	[Parameter(Mandatory=$False)] [string]$generator = "",
+	[Parameter(Mandatory=$False)] [switch]$with_shared = $false,
+	[Parameter(Mandatory=$False)] [switch]$with_examples = $false
+)
+
+function make_absolute( [string]$path ) {
+	if ( -Not( [System.IO.Path]::IsPathRooted( $path ) ) ) {
+		$path = [IO.Path]::GetFullPath( [IO.Path]::Combine( ( ($pwd).Path ), ( $path ) ) )
+	}
+	return $path.Replace( "\", "/" )
+}
+
+function purge {
+	Write-Host -NoNewline "Purging... "
+	Remove-Item "build" -Recurse -ErrorAction Ignore
+	Write-Host "done."
+}
+
+function build( [string]$config, [boolean]$install, [boolean]$build_shared ) {
+	New-Item -ItemType Directory -Force -Path "build/$config" > $null
+	if ( $prefix -eq "" ) {
+		throw "The ``prefix`` paremeter was not specified."
+	}
+	$prefix = make_absolute( $prefix )
+	Push-Location "build/$config"
+	$shared="-DBUILD_SHARED_LIBS=$(if ( $build_shared ) { "ON" } else { "OFF" } )"
+	$examples="-DREPLXX_BUILD_EXAMPLES=$( if ( $with_examples ) { "ON" } else { "OFF" } )"
+	if ( $generator -ne "" ) {
+		$genOpt = "-G"
+	}
+	cmake $shared $examples $genOpt $generator "-DCMAKE_INSTALL_PREFIX=$prefix" ../../
+	cmake --build . --config $config
+	if ( $install ) {
+		cmake --build . --target install --config $config
+	}
+	Pop-Location
+}
+
+function debug( [boolean]$install = $false ) {
+	build "debug" $install $false
+	if ( $with_shared ) {
+		build "debug" $install $true	
+	}
+}
+
+function release( [boolean]$install = $false ) {
+	build "release" $install $false
+	if ( $with_shared ) {
+		build "release" $install $true	
+	}
+}
+
+function install-debug {
+	debug $true
+}
+
+function install-release {
+	release $true
+}
+
+if (
+	( $target -ne "debug" ) -and
+	( $target -ne "release" ) -and
+	( $target -ne "install-debug" ) -and
+	( $target -ne "install-release" ) -and
+	( $target -ne "purge" )
+) {
+	Write-Error "Unknown target: ``$target``"
+	exit 1
+}
+
+try {
+	&$target
+} catch {
+	Pop-Location
+	Write-Error "$_"
+}

third-party/replxx/replxx-config.cmake.in

@@ -0,0 +1,3 @@
+@PACKAGE_INIT@
+
+include("${CMAKE_CURRENT_LIST_DIR}/replxx-targets.cmake")

third-party/replxx/src/ConvertUTF.cpp

@@ -0,0 +1,271 @@
+/*
+ * Copyright 2001-2004 Unicode, Inc.
+ * 
+ * Disclaimer
+ * 
+ * This source code is provided as is by Unicode, Inc. No claims are
+ * made as to fitness for any particular purpose. No warranties of any
+ * kind are expressed or implied. The recipient agrees to determine
+ * applicability of information provided. If this file has been
+ * purchased on magnetic or optical media from Unicode, Inc., the
+ * sole remedy for any claim will be exchange of defective media
+ * within 90 days of receipt.
+ * 
+ * Limitations on Rights to Redistribute This Code
+ * 
+ * Unicode, Inc. hereby grants the right to freely use the information
+ * supplied in this file in the creation of products supporting the
+ * Unicode Standard, and to make copies of this file in any form
+ * for internal or external distribution as long as this notice
+ * remains attached.
+ */
+
+/* ---------------------------------------------------------------------
+
+		Conversions between UTF32, UTF-16, and UTF-8. Source code file.
+		Author: Mark E. Davis, 1994.
+		Rev History: Rick McGowan, fixes & updates May 2001.
+		Sept 2001: fixed const & error conditions per
+				mods suggested by S. Parent & A. Lillich.
+		June 2002: Tim Dodd added detection and handling of incomplete
+				source sequences, enhanced error detection, added casts
+				to eliminate compiler warnings.
+		July 2003: slight mods to back out aggressive FFFE detection.
+		Jan 2004: updated switches in from-UTF8 conversions.
+		Oct 2004: updated to use UNI_MAX_LEGAL_UTF32 in UTF-32 conversions.
+
+		See the header file "ConvertUTF.h" for complete documentation.
+
+------------------------------------------------------------------------ */
+
+#include "ConvertUTF.h"
+#ifdef CVTUTF_DEBUG
+#include <stdio.h>
+#endif
+
+namespace replxx {
+
+#define UNI_SUR_HIGH_START  (UTF32)0xD800
+#define UNI_SUR_LOW_END     (UTF32)0xDFFF
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Index into the table below with the first byte of a UTF-8 sequence to
+ * get the number of trailing bytes that are supposed to follow it.
+ * Note that *legal* UTF-8 values can't have 4 or 5-bytes. The table is
+ * left as-is for anyone who may want to do such conversion, which was
+ * allowed in earlier algorithms.
+ */
+static const char trailingBytesForUTF8[256] = {
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,0,
+		1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,1,
+		2,2,2,2,2,2,2,2,2,2,2,2,2,2,2,2, 3,3,3,3,3,3,3,3,4,4,4,4,5,5,5,5
+};
+
+/*
+ * Magic values subtracted from a buffer value during UTF8 conversion.
+ * This table contains as many values as there might be trailing bytes
+ * in a UTF-8 sequence.
+ */
+static const UTF32 offsetsFromUTF8[6] = { 0x00000000UL, 0x00003080UL, 0x000E2080UL, 
+										 0x03C82080UL, 0xFA082080UL, 0x82082080UL };
+
+/*
+ * Once the bits are split out into bytes of UTF-8, this is a mask OR-ed
+ * into the first byte, depending on how many bytes follow.	There are
+ * as many entries in this table as there are UTF-8 sequence types.
+ * (I.e., one byte sequence, two byte... etc.). Remember that sequencs
+ * for *legal* UTF-8 will be 4 or fewer bytes total.
+ */
+static const UTF8 firstByteMark[7] = { 0x00, 0x00, 0xC0, 0xE0, 0xF0, 0xF8, 0xFC };
+
+/* --------------------------------------------------------------------- */
+
+/* The interface converts a whole buffer to avoid function-call overhead.
+ * Constants have been gathered. Loops & conditionals have been removed as
+ * much as possible for efficiency, in favor of drop-through switches.
+ * (See "Note A" at the bottom of the file for equivalent code.)
+ * If your compiler supports it, the "isLegalUTF8" call can be turned
+ * into an inline function.
+ */
+
+/* --------------------------------------------------------------------- */
+
+/*
+ * Utility routine to tell whether a sequence of bytes is legal UTF-8.
+ * This must be called with the length pre-determined by the first byte.
+ * If not calling this from ConvertUTF8to*, then the length can be set by:
+ *	length = trailingBytesForUTF8[*source]+1;
+ * and the sequence is illegal right away if there aren't that many bytes
+ * available.
+ * If presented with a length > 4, this returns false.	The Unicode
+ * definition of UTF-8 goes up to 4-byte sequences.
+ */
+
+static bool isLegalUTF8(const UTF8 *source, int length) {
+		UTF8 a;
+		const UTF8 *srcptr = source+length;
+		switch (length) {
+		default: return false;
+				/* Everything else falls through when "true"... */
+		case 4: { if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false; } /* fall through */
+		case 3: { if ((a = (*--srcptr)) < 0x80 || a > 0xBF) return false; } /* fall through */
+		case 2: {
+				if ((a = (*--srcptr)) > 0xBF) return false;
+
+				switch (*source) {
+						/* no fall-through in this inner switch */
+						case 0xE0: if (a < 0xA0) return false; break;
+						case 0xED: if (a > 0x9F) return false; break;
+						case 0xF0: if (a < 0x90) return false; break;
+						case 0xF4: if (a > 0x8F) return false; break;
+						default:	 if (a < 0x80) return false;
+				}
+		} /* fall through */
+		case 1: { if (*source >= 0x80 && *source < 0xC2) return false; } /* fall through */
+		}
+		if (*source > 0xF4) return false;
+		return true;
+}
+
+/* --------------------------------------------------------------------- */
+
+ConversionResult ConvertUTF32toUTF8 (
+				const UTF32** sourceStart, const UTF32* sourceEnd, 
+				UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags) {
+		ConversionResult result = conversionOK;
+		const UTF32* source = *sourceStart;
+		UTF8* target = *targetStart;
+		while (source < sourceEnd) {
+				UTF32 ch;
+				unsigned short bytesToWrite = 0;
+				const UTF32 byteMask = 0xBF;
+				const UTF32 byteMark = 0x80; 
+				ch = *source++;
+				if (flags == strictConversion ) {
+						/* UTF-16 surrogate values are illegal in UTF-32 */
+						if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+								--source; /* return to the illegal value itself */
+								result = sourceIllegal;
+								break;
+						}
+				}
+				/*
+				 * Figure out how many bytes the result will require. Turn any
+				 * illegally large UTF32 things (> Plane 17) into replacement chars.
+				 */
+				if (ch < (UTF32)0x80) {			bytesToWrite = 1;
+				} else if (ch < (UTF32)0x800) {		 bytesToWrite = 2;
+				} else if (ch < (UTF32)0x10000) {	 bytesToWrite = 3;
+				} else if (ch <= UNI_MAX_LEGAL_UTF32) {	bytesToWrite = 4;
+				} else {														bytesToWrite = 3;
+																						ch = UNI_REPLACEMENT_CHAR;
+																						result = sourceIllegal;
+				}
+				
+				target += bytesToWrite;
+				if (target > targetEnd) {
+						--source; /* Back up source pointer! */
+						target -= bytesToWrite; result = targetExhausted; break;
+				}
+				switch (bytesToWrite) { /* note: everything falls through. */
+						case 4: { *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; } /* fall through */
+						case 3: { *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; } /* fall through */
+						case 2: { *--target = (UTF8)((ch | byteMark) & byteMask); ch >>= 6; } /* fall through */
+						case 1: { *--target = (UTF8) (ch | firstByteMark[bytesToWrite]); } /* fall through */
+				}
+				target += bytesToWrite;
+		}
+		*sourceStart = source;
+		*targetStart = target;
+		return result;
+}
+
+/* --------------------------------------------------------------------- */
+
+ConversionResult ConvertUTF8toUTF32 (
+				const UTF8** sourceStart, const UTF8* sourceEnd, 
+				UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags) {
+		ConversionResult result = conversionOK;
+		const UTF8* source = *sourceStart;
+		UTF32* target = *targetStart;
+		while (source < sourceEnd) {
+				UTF32 ch = 0;
+				unsigned short extraBytesToRead = trailingBytesForUTF8[*source];
+				if (source + extraBytesToRead >= sourceEnd) {
+						result = sourceExhausted; break;
+				}
+				/* Do this check whether lenient or strict */
+				if (! isLegalUTF8(source, extraBytesToRead+1)) {
+						result = sourceIllegal;
+						break;
+				}
+				/*
+				 * The cases all fall through. See "Note A" below.
+				 */
+				switch (extraBytesToRead) {
+						case 5: { ch += *source++; ch <<= 6; } /* fall through */
+						case 4: { ch += *source++; ch <<= 6; } /* fall through */
+						case 3: { ch += *source++; ch <<= 6; } /* fall through */
+						case 2: { ch += *source++; ch <<= 6; } /* fall through */
+						case 1: { ch += *source++; ch <<= 6; } /* fall through */
+						case 0: { ch += *source++; } /* fall through */
+				}
+				ch -= offsetsFromUTF8[extraBytesToRead];
+
+				if (target >= targetEnd) {
+						source -= (extraBytesToRead+1); /* Back up the source pointer! */
+						result = targetExhausted; break;
+				}
+				if (ch <= UNI_MAX_LEGAL_UTF32) {
+						/*
+						 * UTF-16 surrogate values are illegal in UTF-32, and anything
+						 * over Plane 17 (> 0x10FFFF) is illegal.
+						 */
+						if (ch >= UNI_SUR_HIGH_START && ch <= UNI_SUR_LOW_END) {
+								if (flags == strictConversion) {
+										source -= (extraBytesToRead+1); /* return to the illegal value itself */
+										result = sourceIllegal;
+										break;
+								} else {
+										*target++ = UNI_REPLACEMENT_CHAR;
+								}
+						} else {
+								*target++ = ch;
+						}
+				} else { /* i.e., ch > UNI_MAX_LEGAL_UTF32 */
+						result = sourceIllegal;
+						*target++ = UNI_REPLACEMENT_CHAR;
+				}
+		}
+		*sourceStart = source;
+		*targetStart = target;
+		return result;
+}
+
+}
+
+/* ---------------------------------------------------------------------
+
+		Note A.
+		The fall-through switches in UTF-8 reading code save a
+		temp variable, some decrements & conditionals.	The switches
+		are equivalent to the following loop:
+				{
+						int tmpBytesToRead = extraBytesToRead+1;
+						do {
+								ch += *source++;
+								--tmpBytesToRead;
+								if (tmpBytesToRead) ch <<= 6;
+						} while (tmpBytesToRead > 0);
+				}
+		In UTF-8 writing code, the switches on "bytesToWrite" are
+		similarly unrolled loops.
+
+	 --------------------------------------------------------------------- */

third-party/replxx/src/ConvertUTF.h

@@ -0,0 +1,139 @@
+/*
+ * Copyright 2001-2004 Unicode, Inc.
+ * 
+ * Disclaimer
+ * 
+ * This source code is provided as is by Unicode, Inc. No claims are
+ * made as to fitness for any particular purpose. No warranties of any
+ * kind are expressed or implied. The recipient agrees to determine
+ * applicability of information provided. If this file has been
+ * purchased on magnetic or optical media from Unicode, Inc., the
+ * sole remedy for any claim will be exchange of defective media
+ * within 90 days of receipt.
+ * 
+ * Limitations on Rights to Redistribute This Code
+ * 
+ * Unicode, Inc. hereby grants the right to freely use the information
+ * supplied in this file in the creation of products supporting the
+ * Unicode Standard, and to make copies of this file in any form
+ * for internal or external distribution as long as this notice
+ * remains attached.
+ */
+
+/* ---------------------------------------------------------------------
+
+		Conversions between UTF32, UTF-16, and UTF-8.	Header file.
+
+		Several funtions are included here, forming a complete set of
+		conversions between the three formats.	UTF-7 is not included
+		here, but is handled in a separate source file.
+
+		Each of these routines takes pointers to input buffers and output
+		buffers.	The input buffers are const.
+
+		Each routine converts the text between *sourceStart and sourceEnd,
+		putting the result into the buffer between *targetStart and
+		targetEnd. Note: the end pointers are *after* the last item: e.g. 
+		*(sourceEnd - 1) is the last item.
+
+		The return result indicates whether the conversion was successful,
+		and if not, whether the problem was in the source or target buffers.
+		(Only the first encountered problem is indicated.)
+
+		After the conversion, *sourceStart and *targetStart are both
+		updated to point to the end of last text successfully converted in
+		the respective buffers.
+
+		Input parameters:
+				sourceStart - pointer to a pointer to the source buffer.
+								The contents of this are modified on return so that
+								it points at the next thing to be converted.
+				targetStart - similarly, pointer to pointer to the target buffer.
+				sourceEnd, targetEnd - respectively pointers to the ends of the
+								two buffers, for overflow checking only.
+
+		These conversion functions take a ConversionFlags argument. When this
+		flag is set to strict, both irregular sequences and isolated surrogates
+		will cause an error.	When the flag is set to lenient, both irregular
+		sequences and isolated surrogates are converted.
+
+		Whether the flag is strict or lenient, all illegal sequences will cause
+		an error return. This includes sequences such as: <F4 90 80 80>, <C0 80>,
+		or <A0> in UTF-8, and values above 0x10FFFF in UTF-32. Conformant code
+		must check for illegal sequences.
+
+		When the flag is set to lenient, characters over 0x10FFFF are converted
+		to the replacement character; otherwise (when the flag is set to strict)
+		they constitute an error.
+
+		Output parameters:
+				The value "sourceIllegal" is returned from some routines if the input
+				sequence is malformed.	When "sourceIllegal" is returned, the source
+				value will point to the illegal value that caused the problem. E.g.,
+				in UTF-8 when a sequence is malformed, it points to the start of the
+				malformed sequence.	
+
+		Author: Mark E. Davis, 1994.
+		Rev History: Rick McGowan, fixes & updates May 2001.
+								 Fixes & updates, Sept 2001.
+
+------------------------------------------------------------------------ */
+
+/* ---------------------------------------------------------------------
+		The following 4 definitions are compiler-specific.
+		The C standard does not guarantee that wchar_t has at least
+		16 bits, so wchar_t is no less portable than unsigned short!
+		All should be unsigned values to avoid sign extension during
+		bit mask & shift operations.
+------------------------------------------------------------------------ */
+
+#ifndef REPLXX_CONVERT_UTF8_H_INCLUDED
+#define REPLXX_CONVERT_UTF8_H_INCLUDED 1
+
+#if 0
+typedef unsigned long	UTF32; /* at least 32 bits */
+typedef unsigned short UTF16; /* at least 16 bits */
+typedef unsigned char	UTF8;	/* typically 8 bits */
+#endif
+
+#include <stdint.h>
+#include <string>
+
+namespace replxx {
+
+typedef uint32_t      UTF32;
+typedef uint16_t      UTF16;
+typedef uint8_t       UTF8;
+
+/* Some fundamental constants */
+#define UNI_REPLACEMENT_CHAR (UTF32)0x0000FFFD
+#define UNI_MAX_BMP (UTF32)0x0000FFFF
+#define UNI_MAX_UTF16 (UTF32)0x0010FFFF
+#define UNI_MAX_UTF32 (UTF32)0x7FFFFFFF
+#define UNI_MAX_LEGAL_UTF32 (UTF32)0x0010FFFF
+
+typedef enum {
+				conversionOK,    /* conversion successful */
+				sourceExhausted, /* partial character in source, but hit end */
+				targetExhausted, /* insuff. room in target for conversion */
+				sourceIllegal    /* source sequence is illegal/malformed */
+} ConversionResult;
+
+typedef enum {
+				strictConversion = 0,
+				lenientConversion
+} ConversionFlags;
+
+ConversionResult ConvertUTF8toUTF32 (
+								const UTF8** sourceStart, const UTF8* sourceEnd,
+								UTF32** targetStart, UTF32* targetEnd, ConversionFlags flags);
+
+ConversionResult ConvertUTF32toUTF8 (
+								const UTF32** sourceStart, const UTF32* sourceEnd,
+								UTF8** targetStart, UTF8* targetEnd, ConversionFlags flags);
+
+}
+
+#endif /* REPLXX_CONVERT_UTF8_H_INCLUDED */
+
+/* --------------------------------------------------------------------- */

third-party/replxx/src/conversion.cxx

@@ -0,0 +1,108 @@
+#include <algorithm>
+#include <string>
+#include <cstring>
+#include <cctype>
+#include <locale.h>
+
+#include "conversion.hxx"
+
+#ifdef _WIN32
+#define strdup _strdup
+#endif
+
+using namespace std;
+
+namespace replxx {
+
+namespace locale {
+
+void to_lower( std::string& s_ ) {
+	transform( s_.begin(), s_.end(), s_.begin(), static_cast<int(*)(int)>( &tolower ) );
+}
+
+bool is_8bit_encoding( void ) {
+	bool is8BitEncoding( false );
+	string origLC( setlocale( LC_CTYPE, nullptr ) );
+	string lc( origLC );
+	to_lower( lc );
+	if ( lc == "c" ) {
+		setlocale( LC_CTYPE, "" );
+	}
+	lc = setlocale( LC_CTYPE, nullptr );
+	setlocale( LC_CTYPE, origLC.c_str() );
+	to_lower( lc );
+	if ( lc.find( "8859" ) != std::string::npos ) {
+		is8BitEncoding = true;
+	}
+	return ( is8BitEncoding );
+}
+
+bool is8BitEncoding( is_8bit_encoding() );
+
+}
+
+ConversionResult copyString8to32(char32_t* dst, int dstSize, int& dstCount, const char* src) {
+	ConversionResult res = ConversionResult::conversionOK;
+	if ( ! locale::is8BitEncoding ) {
+		const UTF8* sourceStart = reinterpret_cast<const UTF8*>(src);
+		const UTF8* sourceEnd = sourceStart + strlen(src);
+		UTF32* targetStart = reinterpret_cast<UTF32*>(dst);
+		UTF32* targetEnd = targetStart + dstSize;
+
+		res = ConvertUTF8toUTF32(
+				&sourceStart, sourceEnd, &targetStart, targetEnd, lenientConversion);
+
+		if (res == conversionOK) {
+			dstCount = static_cast<int>( targetStart - reinterpret_cast<UTF32*>( dst ) );
+
+			if (dstCount < dstSize) {
+				*targetStart = 0;
+			}
+		}
+	} else {
+		for ( dstCount = 0; ( dstCount < dstSize ) && src[dstCount]; ++ dstCount ) {
+			dst[dstCount] = src[dstCount];
+		}
+	}
+	return res;
+}
+
+ConversionResult copyString8to32(char32_t* dst, int dstSize, int& dstCount, const char8_t* src) {
+	return copyString8to32(
+		dst, dstSize, dstCount, reinterpret_cast<const char*>(src)
+	);
+}
+
+int copyString32to8( char* dst, int dstSize, const char32_t* src, int srcSize ) {
+	int resCount( 0 );
+	if ( ! locale::is8BitEncoding ) {
+		const UTF32* sourceStart = reinterpret_cast<const UTF32*>(src);
+		const UTF32* sourceEnd = sourceStart + srcSize;
+		UTF8* targetStart = reinterpret_cast<UTF8*>(dst);
+		UTF8* targetEnd = targetStart + dstSize;
+
+		ConversionResult res = ConvertUTF32toUTF8(
+			&sourceStart, sourceEnd, &targetStart, targetEnd, lenientConversion
+		);
+
+		if ( res == conversionOK ) {
+			resCount = static_cast<int>( targetStart - reinterpret_cast<UTF8*>( dst ) );
+			if ( resCount < dstSize ) {
+				*targetStart = 0;
+			}
+		}
+	} else {
+		int i( 0 );
+		for ( i = 0; ( i < dstSize ) && ( i < srcSize ) && src[i]; ++ i ) {
+			dst[i] = static_cast<char>( src[i] );
+		}
+		resCount = i;
+		if ( i < dstSize ) {
+			dst[i] = 0;
+		}
+	}
+	return ( resCount );
+}
+
+}
+

third-party/replxx/src/conversion.hxx

@@ -0,0 +1,30 @@
+#ifndef REPLXX_CONVERSION_HXX_INCLUDED
+#define REPLXX_CONVERSION_HXX_INCLUDED 1
+
+#include "ConvertUTF.h"
+
+#ifdef __has_include
+#if __has_include( <version> )
+#include <version>
+#endif
+#endif
+
+#if ! ( defined( __cpp_lib_char8_t ) || ( defined( __clang_major__ ) && ( __clang_major__ >= 8 ) && ( __cplusplus > 201703L ) ) )
+namespace replxx {
+typedef unsigned char char8_t;
+}
+#endif
+
+namespace replxx {
+
+ConversionResult copyString8to32( char32_t* dst, int dstSize, int& dstCount, char const* src );
+ConversionResult copyString8to32( char32_t* dst, int dstSize, int& dstCount, char8_t const* src );
+int copyString32to8( char* dst, int dstSize, char32_t const* src, int srcSize );
+
+namespace locale {
+extern bool is8BitEncoding;
+}
+
+}
+
+#endif

third-party/replxx/src/escape.cxx

@@ -0,0 +1,890 @@
+#include "escape.hxx"
+#include "terminal.hxx"
+#include "replxx.hxx"
+
+#ifndef _WIN32
+
+namespace replxx {
+
+namespace EscapeSequenceProcessing { // move these out of global namespace
+
+// This chunk of code does parsing of the escape sequences sent by various Linux
+// terminals.
+//
+// It handles arrow keys, Home, End and Delete keys by interpreting the
+// sequences sent by
+// gnome terminal, xterm, rxvt, konsole, aterm and yakuake including the Alt and
+// Ctrl key
+// combinations that are understood by replxx.
+//
+// The parsing uses tables, a bunch of intermediate dispatch routines and a
+// doDispatch
+// loop that reads the tables and sends control to "deeper" routines to continue
+// the
+// parsing.	The starting call to doDispatch( c, initialDispatch ) will
+// eventually return
+// either a character (with optional CTRL and META bits set), or -1 if parsing
+// fails, or
+// zero if an attempt to read from the keyboard fails.
+//
+// This is rather sloppy escape sequence processing, since we're not paying
+// attention to what the
+// actual TERM is set to and are processing all key sequences for all terminals,
+// but it works with
+// the most common keystrokes on the most common terminals.	It's intricate, but
+// the nested 'if'
+// statements required to do it directly would be worse.	This way has the
+// advantage of allowing
+// changes and extensions without having to touch a lot of code.
+
+
+static char32_t thisKeyMetaCtrl = 0;	// holds pre-set Meta and/or Ctrl modifiers
+
+// This dispatch routine is given a dispatch table and then farms work out to
+// routines
+// listed in the table based on the character it is called with.	The dispatch
+// routines can
+// read more input characters to decide what should eventually be returned.
+// Eventually,
+// a called routine returns either a character or -1 to indicate parsing
+// failure.
+//
+char32_t doDispatch(char32_t c, CharacterDispatch& dispatchTable) {
+	for (unsigned int i = 0; i < dispatchTable.len; ++i) {
+		if (static_cast<unsigned char>(dispatchTable.chars[i]) == c) {
+			return dispatchTable.dispatch[i](c);
+		}
+	}
+	return dispatchTable.dispatch[dispatchTable.len](c);
+}
+
+// Final dispatch routines -- return something
+//
+static char32_t normalKeyRoutine(char32_t c) { return thisKeyMetaCtrl | c; }
+static char32_t upArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::UP;;
+}
+static char32_t downArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::DOWN;
+}
+static char32_t rightArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::RIGHT;
+}
+static char32_t leftArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::LEFT;
+}
+static char32_t homeKeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::HOME; }
+static char32_t endKeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::END; }
+static char32_t shiftTabRoutine(char32_t) { return Replxx::KEY::BASE_SHIFT | Replxx::KEY::TAB; }
+static char32_t f1KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F1; }
+static char32_t f2KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F2; }
+static char32_t f3KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F3; }
+static char32_t f4KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F4; }
+static char32_t f5KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F5; }
+static char32_t f6KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F6; }
+static char32_t f7KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F7; }
+static char32_t f8KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F8; }
+static char32_t f9KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F9; }
+static char32_t f10KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F10; }
+static char32_t f11KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F11; }
+static char32_t f12KeyRoutine(char32_t) { return thisKeyMetaCtrl | Replxx::KEY::F12; }
+static char32_t pageUpKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::PAGE_UP;
+}
+static char32_t pageDownKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::PAGE_DOWN;
+}
+static char32_t deleteCharRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::BACKSPACE;
+}	// key labeled Backspace
+static char32_t insertKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::INSERT;
+}	// key labeled Delete
+static char32_t deleteKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::DELETE;
+}	// key labeled Delete
+static char32_t ctrlUpArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::BASE_CONTROL | Replxx::KEY::UP;
+}
+static char32_t ctrlDownArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::BASE_CONTROL | Replxx::KEY::DOWN;
+}
+static char32_t ctrlRightArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::BASE_CONTROL | Replxx::KEY::RIGHT;
+}
+static char32_t ctrlLeftArrowKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::BASE_CONTROL | Replxx::KEY::LEFT;
+}
+static char32_t bracketPasteStartKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::PASTE_START;
+}
+static char32_t bracketPasteFinishKeyRoutine(char32_t) {
+	return thisKeyMetaCtrl | Replxx::KEY::PASTE_FINISH;
+}
+static char32_t escFailureRoutine(char32_t) {
+	beep();
+	return -1;
+}
+
+// Handle ESC [ 1 ; 2 or 3 (or 5) <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket1Semicolon2or3or5Routines[] = {
+	upArrowKeyRoutine,
+	downArrowKeyRoutine,
+	rightArrowKeyRoutine,
+	leftArrowKeyRoutine,
+	homeKeyRoutine,
+	endKeyRoutine,
+	f1KeyRoutine,
+	f2KeyRoutine,
+	f3KeyRoutine,
+	f4KeyRoutine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket1Semicolon2or3or5Dispatch = {
+		10, "ABCDHFPQRS", escLeftBracket1Semicolon2or3or5Routines
+};
+
+// Handle ESC [ 1 ; <more stuff> escape sequences
+//
+static char32_t escLeftBracket1Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket1Semicolon2or3or5Dispatch);
+}
+static char32_t escLeftBracket1Semicolon3Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_META;
+	return doDispatch(c, escLeftBracket1Semicolon2or3or5Dispatch);
+}
+static char32_t escLeftBracket1Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket1Semicolon2or3or5Dispatch);
+}
+static CharacterDispatchRoutine escLeftBracket1SemicolonRoutines[] = {
+	escLeftBracket1Semicolon2Routine,
+	escLeftBracket1Semicolon3Routine,
+	escLeftBracket1Semicolon5Routine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket1SemicolonDispatch = {
+	3, "235", escLeftBracket1SemicolonRoutines
+};
+
+// Handle ESC [ 1 ; <more stuff> escape sequences
+//
+static char32_t escLeftBracket1SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket1SemicolonDispatch);
+}
+
+// (S)-F5
+static CharacterDispatchRoutine escLeftBracket15Semicolon2Routines[] = {
+	f5KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket15Semicolon2Dispatch = {
+	1, "~", escLeftBracket15Semicolon2Routines
+};
+static char32_t escLeftBracket15Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket15Semicolon2Dispatch);
+}
+
+// (C)-F5
+static CharacterDispatchRoutine escLeftBracket15Semicolon5Routines[] = {
+	f5KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket15Semicolon5Dispatch = {
+	1, "~", escLeftBracket15Semicolon5Routines
+};
+static char32_t escLeftBracket15Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket15Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket15SemicolonRoutines[] = {
+	escLeftBracket15Semicolon2Routine, escLeftBracket15Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket15SemicolonDispatch = {
+	2, "25", escLeftBracket15SemicolonRoutines
+};
+static char32_t escLeftBracket15SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket15SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket15Routines[] = {
+	f5KeyRoutine, escLeftBracket15SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket15Dispatch = {
+	2, "~;", escLeftBracket15Routines
+};
+static char32_t escLeftBracket15Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket15Dispatch);
+}
+
+// (S)-F6
+static CharacterDispatchRoutine escLeftBracket17Semicolon2Routines[] = {
+	f6KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket17Semicolon2Dispatch = {
+	1, "~", escLeftBracket17Semicolon2Routines
+};
+static char32_t escLeftBracket17Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket17Semicolon2Dispatch);
+}
+
+// (C)-F6
+static CharacterDispatchRoutine escLeftBracket17Semicolon5Routines[] = {
+	f6KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket17Semicolon5Dispatch = {
+	1, "~", escLeftBracket17Semicolon5Routines
+};
+static char32_t escLeftBracket17Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket17Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket17SemicolonRoutines[] = {
+	escLeftBracket17Semicolon2Routine, escLeftBracket17Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket17SemicolonDispatch = {
+	2, "25", escLeftBracket17SemicolonRoutines
+};
+static char32_t escLeftBracket17SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket17SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket17Routines[] = {
+	f6KeyRoutine, escLeftBracket17SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket17Dispatch = {
+	2, "~;", escLeftBracket17Routines
+};
+static char32_t escLeftBracket17Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket17Dispatch);
+}
+
+// (S)-F7
+static CharacterDispatchRoutine escLeftBracket18Semicolon2Routines[] = {
+	f7KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket18Semicolon2Dispatch = {
+	1, "~", escLeftBracket18Semicolon2Routines
+};
+static char32_t escLeftBracket18Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket18Semicolon2Dispatch);
+}
+
+// (C)-F7
+static CharacterDispatchRoutine escLeftBracket18Semicolon5Routines[] = {
+	f7KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket18Semicolon5Dispatch = {
+	1, "~", escLeftBracket18Semicolon5Routines
+};
+static char32_t escLeftBracket18Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket18Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket18SemicolonRoutines[] = {
+	escLeftBracket18Semicolon2Routine, escLeftBracket18Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket18SemicolonDispatch = {
+	2, "25", escLeftBracket18SemicolonRoutines
+};
+static char32_t escLeftBracket18SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket18SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket18Routines[] = {
+	f7KeyRoutine, escLeftBracket18SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket18Dispatch = {
+	2, "~;", escLeftBracket18Routines
+};
+static char32_t escLeftBracket18Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket18Dispatch);
+}
+
+// (S)-F8
+static CharacterDispatchRoutine escLeftBracket19Semicolon2Routines[] = {
+	f8KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket19Semicolon2Dispatch = {
+	1, "~", escLeftBracket19Semicolon2Routines
+};
+static char32_t escLeftBracket19Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket19Semicolon2Dispatch);
+}
+
+// (C)-F8
+static CharacterDispatchRoutine escLeftBracket19Semicolon5Routines[] = {
+	f8KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket19Semicolon5Dispatch = {
+	1, "~", escLeftBracket19Semicolon5Routines
+};
+static char32_t escLeftBracket19Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket19Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket19SemicolonRoutines[] = {
+	escLeftBracket19Semicolon2Routine, escLeftBracket19Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket19SemicolonDispatch = {
+	2, "25", escLeftBracket19SemicolonRoutines
+};
+static char32_t escLeftBracket19SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket19SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket19Routines[] = {
+	f8KeyRoutine, escLeftBracket19SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket19Dispatch = {
+	2, "~;", escLeftBracket19Routines
+};
+static char32_t escLeftBracket19Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket19Dispatch);
+}
+
+// Handle ESC [ 1 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket1Routines[] = {
+	homeKeyRoutine, escLeftBracket1SemicolonRoutine,
+	escLeftBracket15Routine,
+	escLeftBracket17Routine,
+	escLeftBracket18Routine,
+	escLeftBracket19Routine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket1Dispatch = {
+	6, "~;5789", escLeftBracket1Routines
+};
+
+// Handle ESC [ 2 <more stuff> escape sequences
+//
+
+// (S)-F9
+static CharacterDispatchRoutine escLeftBracket20Semicolon2Routines[] = {
+	f9KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket20Semicolon2Dispatch = {
+	1, "~", escLeftBracket20Semicolon2Routines
+};
+static char32_t escLeftBracket20Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket20Semicolon2Dispatch);
+}
+
+// (C)-F9
+static CharacterDispatchRoutine escLeftBracket20Semicolon5Routines[] = {
+	f9KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket20Semicolon5Dispatch = {
+	1, "~", escLeftBracket20Semicolon5Routines
+};
+static char32_t escLeftBracket20Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket20Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket20SemicolonRoutines[] = {
+	escLeftBracket20Semicolon2Routine, escLeftBracket20Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket20SemicolonDispatch = {
+	2, "25", escLeftBracket20SemicolonRoutines
+};
+static char32_t escLeftBracket20SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket20SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket200Routines[] = {
+	bracketPasteStartKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket200Dispatch = {
+	1, "~", escLeftBracket200Routines
+};
+static char32_t escLeftBracket200Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket200Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket201Routines[] = {
+	bracketPasteFinishKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket201Dispatch = {
+	1, "~", escLeftBracket201Routines
+};
+static char32_t escLeftBracket201Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket201Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket20Routines[] = {
+	f9KeyRoutine, escLeftBracket20SemicolonRoutine, escLeftBracket200Routine, escLeftBracket201Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket20Dispatch = {
+	4, "~;01", escLeftBracket20Routines
+};
+static char32_t escLeftBracket20Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket20Dispatch);
+}
+
+// (S)-F10
+static CharacterDispatchRoutine escLeftBracket21Semicolon2Routines[] = {
+	f10KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket21Semicolon2Dispatch = {
+	1, "~", escLeftBracket21Semicolon2Routines
+};
+static char32_t escLeftBracket21Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket21Semicolon2Dispatch);
+}
+
+// (C)-F10
+static CharacterDispatchRoutine escLeftBracket21Semicolon5Routines[] = {
+	f10KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket21Semicolon5Dispatch = {
+	1, "~", escLeftBracket21Semicolon5Routines
+};
+static char32_t escLeftBracket21Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket21Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket21SemicolonRoutines[] = {
+	escLeftBracket21Semicolon2Routine, escLeftBracket21Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket21SemicolonDispatch = {
+	2, "25", escLeftBracket21SemicolonRoutines
+};
+static char32_t escLeftBracket21SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket21SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket21Routines[] = {
+	f10KeyRoutine, escLeftBracket21SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket21Dispatch = {
+	2, "~;", escLeftBracket21Routines
+};
+static char32_t escLeftBracket21Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket21Dispatch);
+}
+
+// (S)-F11
+static CharacterDispatchRoutine escLeftBracket23Semicolon2Routines[] = {
+	f11KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket23Semicolon2Dispatch = {
+	1, "~", escLeftBracket23Semicolon2Routines
+};
+static char32_t escLeftBracket23Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket23Semicolon2Dispatch);
+}
+
+// (C)-F11
+static CharacterDispatchRoutine escLeftBracket23Semicolon5Routines[] = {
+	f11KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket23Semicolon5Dispatch = {
+	1, "~", escLeftBracket23Semicolon5Routines
+};
+static char32_t escLeftBracket23Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket23Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket23SemicolonRoutines[] = {
+	escLeftBracket23Semicolon2Routine, escLeftBracket23Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket23SemicolonDispatch = {
+	2, "25", escLeftBracket23SemicolonRoutines
+};
+static char32_t escLeftBracket23SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket23SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket23Routines[] = {
+	f11KeyRoutine, escLeftBracket23SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket23Dispatch = {
+	2, "~;", escLeftBracket23Routines
+};
+static char32_t escLeftBracket23Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket23Dispatch);
+}
+
+// (S)-F12
+static CharacterDispatchRoutine escLeftBracket24Semicolon2Routines[] = {
+	f12KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket24Semicolon2Dispatch = {
+	1, "~", escLeftBracket24Semicolon2Routines
+};
+static char32_t escLeftBracket24Semicolon2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_SHIFT;
+	return doDispatch(c, escLeftBracket24Semicolon2Dispatch);
+}
+
+// (C)-F12
+static CharacterDispatchRoutine escLeftBracket24Semicolon5Routines[] = {
+	f12KeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket24Semicolon5Dispatch = {
+	1, "~", escLeftBracket24Semicolon5Routines
+};
+static char32_t escLeftBracket24Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket24Semicolon5Dispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket24SemicolonRoutines[] = {
+	escLeftBracket24Semicolon2Routine, escLeftBracket24Semicolon5Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket24SemicolonDispatch = {
+	2, "25", escLeftBracket24SemicolonRoutines
+};
+static char32_t escLeftBracket24SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket24SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket24Routines[] = {
+	f12KeyRoutine, escLeftBracket24SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket24Dispatch = {
+	2, "~;", escLeftBracket24Routines
+};
+static char32_t escLeftBracket24Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket24Dispatch);
+}
+
+// Handle ESC [ 2 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket2Routines[] = {
+	insertKeyRoutine,
+	escLeftBracket20Routine,
+	escLeftBracket21Routine,
+	escLeftBracket23Routine,
+	escLeftBracket24Routine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket2Dispatch = {
+	5, "~0134", escLeftBracket2Routines
+};
+
+// Handle ESC [ 3 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket3Routines[] = {
+	deleteKeyRoutine, escFailureRoutine
+};
+
+static CharacterDispatch escLeftBracket3Dispatch = {
+	1, "~", escLeftBracket3Routines
+};
+
+// Handle ESC [ 4 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket4Routines[] = {
+	endKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket4Dispatch = {
+	1, "~", escLeftBracket4Routines
+};
+
+// Handle ESC [ 5 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket5Semicolon5Routines[] = {
+	pageUpKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket5Semicolon5Dispatch = {
+	1, "~", escLeftBracket5Semicolon5Routines
+};
+static char32_t escLeftBracket5Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket5Semicolon5Dispatch);
+}
+static CharacterDispatchRoutine escLeftBracket5SemicolonRoutines[] = {
+	escLeftBracket5Semicolon5Routine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket5SemicolonDispatch = {
+	1, "5", escLeftBracket5SemicolonRoutines
+};
+static char32_t escLeftBracket5SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket5SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket5Routines[] = {
+	pageUpKeyRoutine, escLeftBracket5SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket5Dispatch = {
+	2, "~;", escLeftBracket5Routines
+};
+
+// Handle ESC [ 6 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket6Semicolon5Routines[] = {
+	pageDownKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket6Semicolon5Dispatch = {
+	1, "~", escLeftBracket6Semicolon5Routines
+};
+static char32_t escLeftBracket6Semicolon5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	thisKeyMetaCtrl |= Replxx::KEY::BASE_CONTROL;
+	return doDispatch(c, escLeftBracket6Semicolon5Dispatch);
+}
+static CharacterDispatchRoutine escLeftBracket6SemicolonRoutines[] = {
+	escLeftBracket6Semicolon5Routine,
+	escFailureRoutine
+};
+static CharacterDispatch escLeftBracket6SemicolonDispatch = {
+	1, "5", escLeftBracket6SemicolonRoutines
+};
+static char32_t escLeftBracket6SemicolonRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket6SemicolonDispatch);
+}
+
+static CharacterDispatchRoutine escLeftBracket6Routines[] = {
+	pageDownKeyRoutine, escLeftBracket6SemicolonRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket6Dispatch = {
+	2, "~;", escLeftBracket6Routines
+};
+
+// Handle ESC [ 7 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket7Routines[] = {
+	homeKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket7Dispatch = {
+	1, "~", escLeftBracket7Routines
+};
+
+// Handle ESC [ 8 <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracket8Routines[] = {
+	endKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracket8Dispatch = {
+	1, "~", escLeftBracket8Routines
+};
+
+// Handle ESC [ <digit> escape sequences
+//
+static char32_t escLeftBracket0Routine(char32_t c) {
+	return escFailureRoutine(c);
+}
+static char32_t escLeftBracket1Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket1Dispatch);
+}
+static char32_t escLeftBracket2Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket2Dispatch);
+}
+static char32_t escLeftBracket3Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket3Dispatch);
+}
+static char32_t escLeftBracket4Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket4Dispatch);
+}
+static char32_t escLeftBracket5Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket5Dispatch);
+}
+static char32_t escLeftBracket6Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket6Dispatch);
+}
+static char32_t escLeftBracket7Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket7Dispatch);
+}
+static char32_t escLeftBracket8Routine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracket8Dispatch);
+}
+static char32_t escLeftBracket9Routine(char32_t c) {
+	return escFailureRoutine(c);
+}
+
+// Handle ESC [ <more stuff> escape sequences
+//
+static CharacterDispatchRoutine escLeftBracketRoutines[] = {
+	upArrowKeyRoutine,      downArrowKeyRoutine,    rightArrowKeyRoutine,
+	leftArrowKeyRoutine,    homeKeyRoutine,         endKeyRoutine,
+	shiftTabRoutine,
+	escLeftBracket0Routine, escLeftBracket1Routine, escLeftBracket2Routine,
+	escLeftBracket3Routine, escLeftBracket4Routine, escLeftBracket5Routine,
+	escLeftBracket6Routine, escLeftBracket7Routine, escLeftBracket8Routine,
+	escLeftBracket9Routine, escFailureRoutine
+};
+static CharacterDispatch escLeftBracketDispatch = {17, "ABCDHFZ0123456789",
+																									 escLeftBracketRoutines};
+
+// Handle ESC O <char> escape sequences
+//
+static CharacterDispatchRoutine escORoutines[] = {
+	upArrowKeyRoutine,       downArrowKeyRoutine,     rightArrowKeyRoutine,
+	leftArrowKeyRoutine,     homeKeyRoutine,          endKeyRoutine,
+	f1KeyRoutine,            f2KeyRoutine,            f3KeyRoutine,
+	f4KeyRoutine,
+	ctrlUpArrowKeyRoutine,   ctrlDownArrowKeyRoutine, ctrlRightArrowKeyRoutine,
+	ctrlLeftArrowKeyRoutine, escFailureRoutine
+};
+static CharacterDispatch escODispatch = {14, "ABCDHFPQRSabcd", escORoutines};
+
+// Initial ESC dispatch -- could be a Meta prefix or the start of an escape
+// sequence
+//
+static char32_t escLeftBracketRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escLeftBracketDispatch);
+}
+static char32_t escORoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escODispatch);
+}
+static char32_t setMetaRoutine(char32_t c);	// need forward reference
+static CharacterDispatchRoutine escRoutines[] = {
+	escLeftBracketRoutine, escORoutine, setMetaRoutine
+};
+static CharacterDispatch escDispatch = {2, "[O", escRoutines};
+
+// Initial dispatch -- we are not in the middle of anything yet
+//
+static char32_t escRoutine(char32_t c) {
+	c = read_unicode_character();
+	if (c == 0) return 0;
+	return doDispatch(c, escDispatch);
+}
+static CharacterDispatchRoutine initialRoutines[] = {
+	escRoutine, deleteCharRoutine, normalKeyRoutine
+};
+static CharacterDispatch initialDispatch = {2, "\x1B\x7F", initialRoutines};
+
+// Special handling for the ESC key because it does double duty
+//
+static char32_t setMetaRoutine(char32_t c) {
+	thisKeyMetaCtrl = Replxx::KEY::BASE_META;
+	if (c == 0x1B) {	// another ESC, stay in ESC processing mode
+		c = read_unicode_character();
+		if (c == 0) return 0;
+		return doDispatch(c, escDispatch);
+	}
+	return doDispatch(c, initialDispatch);
+}
+
+char32_t doDispatch(char32_t c) {
+	EscapeSequenceProcessing::thisKeyMetaCtrl = 0;	// no modifiers yet at initialDispatch
+	return doDispatch(c, initialDispatch);
+}
+
+}	// namespace EscapeSequenceProcessing // move these out of global namespace
+
+}
+
+#endif /* #ifndef _WIN32 */
+

third-party/replxx/src/escape.hxx

@@ -0,0 +1,37 @@
+#ifndef REPLXX_ESCAPE_HXX_INCLUDED
+#define REPLXX_ESCAPE_HXX_INCLUDED 1
+
+namespace replxx {
+
+namespace EscapeSequenceProcessing {
+
+// This is a typedef for the routine called by doDispatch().	It takes the
+// current character
+// as input, does any required processing including reading more characters and
+// calling other
+// dispatch routines, then eventually returns the final (possibly extended or
+// special) character.
+//
+typedef char32_t (*CharacterDispatchRoutine)(char32_t);
+
+// This structure is used by doDispatch() to hold a list of characters to test
+// for and
+// a list of routines to call if the character matches.	The dispatch routine
+// list is one
+// longer than the character list; the final entry is used if no character
+// matches.
+//
+struct CharacterDispatch {
+	unsigned int len;                   // length of the chars list
+	const char* chars;                  // chars to test
+	CharacterDispatchRoutine* dispatch; // array of routines to call
+};
+
+char32_t doDispatch(char32_t c);
+
+}
+
+}
+
+#endif
+

third-party/replxx/src/history.cxx

@@ -0,0 +1,402 @@
+#include <algorithm>
+#include <memory>
+#include <fstream>
+#include <cstring>
+
+#ifndef _WIN32
+
+#include <unistd.h>
+#include <fcntl.h>
+#include <sys/stat.h>
+
+#endif /* _WIN32 */
+
+#include "replxx.hxx"
+#include "history.hxx"
+
+using namespace std;
+
+namespace replxx {
+
+namespace {
+void delete_ReplxxHistoryScanImpl( Replxx::HistoryScanImpl* impl_ ) {
+	delete impl_;
+}
+}
+
+static int const REPLXX_DEFAULT_HISTORY_MAX_LEN( 1000 );
+
+Replxx::HistoryScan::HistoryScan( impl_t impl_ )
+	: _impl( std::move( impl_ ) ) {
+}
+
+bool Replxx::HistoryScan::next( void ) {
+	return ( _impl->next() );
+}
+
+Replxx::HistoryScanImpl::HistoryScanImpl( History::entries_t const& entries_ )
+	: _entries( entries_ )
+	, _it( _entries.end() )
+	, _utf8Cache()
+	, _entryCache( std::string(), std::string() )
+	, _cacheValid( false ) {
+}
+
+Replxx::HistoryEntry const& Replxx::HistoryScan::get( void ) const {
+	return ( _impl->get() );
+}
+
+bool Replxx::HistoryScanImpl::next( void ) {
+	if ( _it == _entries.end() ) {
+		_it = _entries.begin();
+	} else {
+		++ _it;
+	}
+	_cacheValid = false;
+	return ( _it != _entries.end() );
+}
+
+Replxx::HistoryEntry const& Replxx::HistoryScanImpl::get( void ) const {
+	if ( _cacheValid ) {
+		return ( _entryCache );
+	}
+	_utf8Cache.assign( _it->text() );
+	_entryCache = Replxx::HistoryEntry( _it->timestamp(), _utf8Cache.get() );
+	_cacheValid = true;
+	return ( _entryCache );
+}
+
+Replxx::HistoryScan::impl_t History::scan( void ) const {
+	return ( Replxx::HistoryScan::impl_t( new Replxx::HistoryScanImpl( _entries ), delete_ReplxxHistoryScanImpl ) );
+}
+
+History::History( void )
+	: _entries()
+	, _maxSize( REPLXX_DEFAULT_HISTORY_MAX_LEN )
+	, _current( _entries.begin() )
+	, _yankPos( _entries.end() )
+	, _previous( _entries.begin() )
+	, _recallMostRecent( false )
+	, _unique( true ) {
+}
+
+void History::add( UnicodeString const& line, std::string const& when ) {
+	if ( _maxSize <= 0 ) {
+		return;
+	}
+	if ( ! _entries.empty() && ( line == _entries.back().text() ) ) {
+		_entries.back() = Entry( now_ms_str(), line );
+		return;
+	}
+	remove_duplicate( line );
+	trim_to_max_size();
+	_entries.emplace_back( when, line );
+	_locations.insert( make_pair( line, last() ) );
+	if ( _current == _entries.end() ) {
+		_current = last();
+	}
+	_yankPos = _entries.end();
+}
+
+#ifndef _WIN32
+class FileLock {
+	std::string _path;
+	int _lockFd;
+public:
+	FileLock( std::string const& name_ )
+		: _path( name_ + ".lock" )
+		, _lockFd( ::open( _path.c_str(), O_CREAT | O_RDWR, 0600 ) ) {
+		static_cast<void>( ::lockf( _lockFd, F_LOCK, 0 ) == 0 );
+	}
+	~FileLock( void ) {
+		static_cast<void>( ::lockf( _lockFd, F_ULOCK, 0 ) == 0 );
+		::close( _lockFd );
+		::unlink( _path.c_str() );
+		return;
+	}
+};
+#endif
+
+bool History::save( std::string const& filename, bool sync_ ) {
+#ifndef _WIN32
+	mode_t old_umask = umask( S_IXUSR | S_IRWXG | S_IRWXO );
+	FileLock fileLock( filename );
+#endif
+	entries_t entries;
+	locations_t locations;
+	if ( ! sync_ ) {
+		entries.swap( _entries );
+		locations.swap( _locations );
+		_entries = entries;
+		reset_iters();
+	}
+	do_load( filename );
+	sort();
+	remove_duplicates();
+	trim_to_max_size();
+	ofstream histFile( filename );
+	if ( ! histFile ) {
+		return ( false );
+	}
+#ifndef _WIN32
+	umask( old_umask );
+	chmod( filename.c_str(), S_IRUSR | S_IWUSR );
+#endif
+	Utf8String utf8;
+	for ( Entry const& h : _entries ) {
+		if ( ! h.text().is_empty() ) {
+			utf8.assign( h.text() );
+			histFile << "### " << h.timestamp() << "\n" << utf8.get() << endl;
+		}
+	}
+	if ( ! sync_ ) {
+		_entries = std::move( entries );
+		_locations = std::move( locations );
+	}
+	reset_iters();
+	return ( true );
+}
+
+namespace {
+
+bool is_timestamp( std::string const& s ) {
+	static char const TIMESTAMP_PATTERN[] = "### dddd-dd-dd dd:dd:dd.ddd";
+	static int const TIMESTAMP_LENGTH( sizeof ( TIMESTAMP_PATTERN ) - 1 );
+	if ( s.length() != TIMESTAMP_LENGTH ) {
+		return ( false );
+	}
+	for ( int i( 0 ); i < TIMESTAMP_LENGTH; ++ i ) {
+		if ( TIMESTAMP_PATTERN[i] == 'd' ) {
+			if ( ! isdigit( s[i] ) ) {
+				return ( false );
+			}
+		} else if ( s[i] != TIMESTAMP_PATTERN[i] ) {
+			return ( false );
+		}
+	}
+	return ( true );
+}
+
+}
+
+bool History::do_load( std::string const& filename ) {
+	ifstream histFile( filename );
+	if ( ! histFile ) {
+		return ( false );
+	}
+	string line;
+	string when( "0000-00-00 00:00:00.000" );
+	while ( getline( histFile, line ).good() ) {
+		string::size_type eol( line.find_first_of( "\r\n" ) );
+		if ( eol != string::npos ) {
+			line.erase( eol );
+		}
+		if ( is_timestamp( line ) ) {
+			when.assign( line, 4, std::string::npos );
+			continue;
+		}
+		if ( ! line.empty() ) {
+			_entries.emplace_back( when, UnicodeString( line ) );
+		}
+	}
+	return ( true );
+}
+
+bool History::load( std::string const& filename ) {
+	clear();
+	bool success( do_load( filename ) );
+	sort();
+	remove_duplicates();
+	trim_to_max_size();
+	_previous = _current = last();
+	_yankPos = _entries.end();
+	return ( success );
+}
+
+void History::sort( void ) {
+	typedef std::vector<Entry> sortable_entries_t;
+	_locations.clear();
+	sortable_entries_t sortableEntries( _entries.begin(), _entries.end() );
+	std::stable_sort( sortableEntries.begin(), sortableEntries.end() );
+	_entries.clear();
+	_entries.insert( _entries.begin(), sortableEntries.begin(), sortableEntries.end() );
+}
+
+void History::clear( void ) {
+	_locations.clear();
+	_entries.clear();
+	_current = _entries.begin();
+	_recallMostRecent = false;
+}
+
+void History::set_max_size( int size_ ) {
+	if ( size_ >= 0 ) {
+		_maxSize = size_;
+		trim_to_max_size();
+	}
+}
+
+void History::reset_yank_iterator( void ) {
+	_yankPos = _entries.end();
+}
+
+bool History::next_yank_position( void ) {
+	bool resetYankSize( false );
+	if ( _yankPos == _entries.end() ) {
+		resetYankSize = true;
+	}
+	if ( ( _yankPos != _entries.begin() ) && ( _yankPos != _entries.end() ) ) {
+		-- _yankPos;
+	} else {
+		_yankPos = moved( _entries.end(), -2 );
+	}
+	return ( resetYankSize );
+}
+
+bool History::move( bool up_ ) {
+	bool doRecall( _recallMostRecent && ! up_ );
+	if ( doRecall ) {
+		_current = _previous; // emulate Windows down-arrow
+	}
+	_recallMostRecent = false;
+	return ( doRecall || move( _current, up_ ? -1 : 1 ) );
+}
+
+void History::jump( bool start_, bool reset_ ) {
+	if ( start_ ) {
+		_current = _entries.begin();
+	} else {
+		_current = last();
+	}
+	if ( reset_ ) {
+		_recallMostRecent = false;
+	}
+}
+
+void History::save_pos( void ) {
+	_previous = _current;
+}
+
+void History::restore_pos( void ) {
+	_current = _previous;
+}
+
+bool History::common_prefix_search( UnicodeString const& prefix_, int prefixSize_, bool back_ ) {
+	int step( back_ ? -1 : 1 );
+	entries_t::const_iterator it( moved( _current, step, true ) );
+	while ( it != _current ) {
+		if ( it->text().starts_with( prefix_.begin(), prefix_.begin() + prefixSize_ ) ) {
+			_current = it;
+			commit_index();
+			return ( true );
+		}
+		move( it, step, true );
+	}
+	return ( false );
+}
+
+bool History::move( entries_t::const_iterator& it_, int by_, bool wrapped_ ) const {
+	if ( by_ > 0 ) {
+		for ( int i( 0 ); i < by_; ++ i ) {
+			++ it_;
+			if ( it_ != _entries.end() ) {
+			} else if ( wrapped_ ) {
+				it_ = _entries.begin();
+			} else {
+				-- it_;
+				return ( false );
+			}
+		}
+	} else {
+		for ( int i( 0 ); i > by_; -- i ) {
+			if ( it_ != _entries.begin() ) {
+				-- it_;
+			} else if ( wrapped_ ) {
+				it_ = last();
+			} else {
+				return ( false );
+			}
+		}
+	}
+	return ( true );
+}
+
+History::entries_t::const_iterator History::moved( entries_t::const_iterator it_, int by_, bool wrapped_ ) const {
+	move( it_, by_, wrapped_ );
+	return ( it_ );
+}
+
+void History::erase( entries_t::const_iterator it_ ) {
+	bool invalidated( it_ == _current );
+	_locations.erase( it_->text() );
+	it_ = _entries.erase( it_ );
+	if ( invalidated ) {
+		_current = it_;
+	}
+	if ( ( _current == _entries.end() ) && ! _entries.empty() ) {
+		-- _current;
+	}
+	_yankPos = _entries.end();
+	_previous = _current;
+}
+
+void History::trim_to_max_size( void ) {
+	while ( size() > _maxSize ) {
+		erase( _entries.begin() );
+	}
+}
+
+void History::remove_duplicate( UnicodeString const& line_ ) {
+	if ( ! _unique ) {
+		return;
+	}
+	locations_t::iterator it( _locations.find( line_ ) );
+	if ( it == _locations.end() ) {
+		return;
+	}
+	erase( it->second );
+}
+
+void History::remove_duplicates( void ) {
+	if ( ! _unique ) {
+		return;
+	}
+	_locations.clear();
+	typedef std::pair<locations_t::iterator, bool> locations_insertion_result_t;
+	for ( entries_t::iterator it( _entries.begin() ), end( _entries.end() ); it != end; ++ it ) {
+		locations_insertion_result_t locationsInsertionResult( _locations.insert( make_pair( it->text(), it ) ) );
+		if ( ! locationsInsertionResult.second ) {
+			_entries.erase( locationsInsertionResult.first->second );
+			locationsInsertionResult.first->second = it;
+		}
+	}
+}
+
+void History::update_last( UnicodeString const& line_ ) {
+	if ( _unique ) {
+		_locations.erase( _entries.back().text() );
+		remove_duplicate( line_ );
+		_locations.insert( make_pair( line_, last() ) );
+	}
+	_entries.back() = Entry( now_ms_str(), line_ );
+}
+
+void History::drop_last( void ) {
+	erase( last() );
+}
+
+bool History::is_last( void ) const {
+	return ( _current == last() );
+}
+
+History::entries_t::const_iterator History::last( void ) const {
+	return ( moved( _entries.end(), -1 ) );
+}
+
+void History::reset_iters( void ) {
+	_previous = _current = last();
+	_yankPos = _entries.end();
+}
+
+}
+

third-party/replxx/src/history.hxx

@@ -0,0 +1,141 @@
+#ifndef REPLXX_HISTORY_HXX_INCLUDED
+#define REPLXX_HISTORY_HXX_INCLUDED 1
+
+#include <list>
+#include <unordered_map>
+
+#include "unicodestring.hxx"
+#include "utf8string.hxx"
+#include "conversion.hxx"
+#include "util.hxx"
+
+namespace std {
+template<>
+struct hash<replxx::UnicodeString> {
+	std::size_t operator()( replxx::UnicodeString const& us_ ) const {
+		std::size_t h( 0 );
+		char32_t const* p( us_.get() );
+		char32_t const* e( p + us_.length() );
+		while ( p != e ) {
+			h *= 31;
+			h += *p;
+			++ p;
+		}
+		return ( h );
+	}
+};
+}
+
+namespace replxx {
+
+class History {
+public:
+	class Entry {
+		std::string _timestamp;
+		UnicodeString _text;
+	public:
+		Entry( std::string const& timestamp_, UnicodeString const& text_ )
+			: _timestamp( timestamp_ )
+			, _text( text_ ) {
+		}
+		std::string const& timestamp( void ) const {
+			return ( _timestamp );
+		}
+		UnicodeString const& text( void ) const {
+			return ( _text );
+		}
+		bool operator < ( Entry const& other_ ) const {
+			return ( _timestamp < other_._timestamp );
+		}
+	};
+	typedef std::list<Entry> entries_t;
+	typedef std::unordered_map<UnicodeString, entries_t::const_iterator> locations_t;
+private:
+	entries_t _entries;
+	locations_t _locations;
+	int _maxSize;
+	entries_t::const_iterator _current;
+	entries_t::const_iterator _yankPos;
+	/*
+	 * _previous and _recallMostRecent are used to allow
+	 * HISTORY_NEXT action (a down-arrow key) to have a special meaning
+	 * if invoked after a line from history was accepted without
+	 * any modification.
+	 * Special meaning is: a down arrow shall jump to the line one
+	 * after previously accepted from history.
+	 */
+	entries_t::const_iterator _previous;
+	bool _recallMostRecent;
+	bool _unique;
+public:
+	History( void );
+	void add( UnicodeString const& line, std::string const& when = now_ms_str() );
+	bool save( std::string const& filename, bool );
+	bool load( std::string const& filename );
+	void clear( void );
+	void set_max_size( int len );
+	void set_unique( bool unique_ ) {
+		_unique = unique_;
+		remove_duplicates();
+	}
+	void reset_yank_iterator();
+	bool next_yank_position( void );
+	void reset_recall_most_recent( void ) {
+		_recallMostRecent = false;
+	}
+	void commit_index( void ) {
+		_previous = _current;
+		_recallMostRecent = true;
+	}
+	bool is_empty( void ) const {
+		return ( _entries.empty() );
+	}
+	void update_last( UnicodeString const& );
+	void drop_last( void );
+	bool is_last( void ) const;
+	bool move( bool );
+	UnicodeString const& current( void ) const {
+		return ( _current->text() );
+	}
+	UnicodeString const& yank_line( void ) const {
+		return ( _yankPos->text() );
+	}
+	void jump( bool, bool = true );
+	bool common_prefix_search( UnicodeString const&, int, bool );
+	int size( void ) const {
+		return ( static_cast<int>( _entries.size() ) );
+	}
+	Replxx::HistoryScan::impl_t scan( void ) const;
+	void save_pos( void );
+	void restore_pos( void );
+private:
+	History( History const& ) = delete;
+	History& operator = ( History const& ) = delete;
+	bool move( entries_t::const_iterator&, int, bool = false ) const;
+	entries_t::const_iterator moved( entries_t::const_iterator, int, bool = false ) const;
+	void erase( entries_t::const_iterator );
+	void trim_to_max_size( void );
+	void remove_duplicate( UnicodeString const& );
+	void remove_duplicates( void );
+	bool do_load( std::string const& );
+	entries_t::const_iterator last( void ) const;
+	void sort( void );
+	void reset_iters( void );
+};
+
+class Replxx::HistoryScanImpl {
+	History::entries_t const& _entries;
+	History::entries_t::const_iterator _it;
+	mutable Utf8String _utf8Cache;
+	mutable Replxx::HistoryEntry _entryCache;
+	mutable bool _cacheValid;
+public:
+	HistoryScanImpl( History::entries_t const& );
+	bool next( void );
+	Replxx::HistoryEntry const& get( void ) const;
+};
+
+}
+
+#endif
+

third-party/replxx/src/killring.hxx

@@ -0,0 +1,78 @@
+#ifndef REPLXX_KILLRING_HXX_INCLUDED
+#define REPLXX_KILLRING_HXX_INCLUDED 1
+
+#include <vector>
+
+#include "unicodestring.hxx"
+
+namespace replxx {
+
+class KillRing {
+	static const int capacity = 10;
+	int size;
+	int index;
+	char indexToSlot[10];
+	std::vector<UnicodeString> theRing;
+
+public:
+	enum action { actionOther, actionKill, actionYank };
+	action lastAction;
+
+	KillRing()
+		: size(0)
+		, index(0)
+		, lastAction(actionOther) {
+		theRing.reserve(capacity);
+	}
+
+	void kill(const char32_t* text, int textLen, bool forward) {
+		if (textLen == 0) {
+			return;
+		}
+		UnicodeString killedText(text, textLen);
+		if (lastAction == actionKill && size > 0) {
+			int slot = indexToSlot[0];
+			int currentLen = static_cast<int>(theRing[slot].length());
+			UnicodeString temp;
+			if ( forward ) {
+				temp.append( theRing[slot].get(), currentLen ).append( killedText.get(), textLen );
+			} else {
+				temp.append( killedText.get(), textLen ).append( theRing[slot].get(), currentLen );
+			}
+			theRing[slot] = temp;
+		} else {
+			if (size < capacity) {
+				if (size > 0) {
+					memmove(&indexToSlot[1], &indexToSlot[0], size);
+				}
+				indexToSlot[0] = size;
+				size++;
+				theRing.push_back(killedText);
+			} else {
+				int slot = indexToSlot[capacity - 1];
+				theRing[slot] = killedText;
+				memmove(&indexToSlot[1], &indexToSlot[0], capacity - 1);
+				indexToSlot[0] = slot;
+			}
+			index = 0;
+		}
+	}
+
+	UnicodeString* yank() { return (size > 0) ? &theRing[indexToSlot[index]] : 0; }
+
+	UnicodeString* yankPop() {
+		if (size == 0) {
+			return 0;
+		}
+		++index;
+		if (index == size) {
+			index = 0;
+		}
+		return &theRing[indexToSlot[index]];
+	}
+};
+
+}
+
+#endif
+

third-party/replxx/src/prompt.cxx

@@ -0,0 +1,154 @@
+#ifdef _WIN32
+
+#include <conio.h>
+#include <windows.h>
+#include <io.h>
+#if _MSC_VER < 1900 && defined (_MSC_VER)
+#define snprintf _snprintf	// Microsoft headers use underscores in some names
+#endif
+#define strcasecmp _stricmp
+#define strdup _strdup
+#define write _write
+#define STDIN_FILENO 0
+
+#else /* _WIN32 */
+
+#include <unistd.h>
+
+#endif /* _WIN32 */
+
+#include "prompt.hxx"
+#include "util.hxx"
+
+namespace replxx {
+
+Prompt::Prompt( Terminal& terminal_ )
+	: _extraLines( 0 )
+	, _lastLinePosition( 0 )
+	, _previousInputLen( 0 )
+	, _previousLen( 0 )
+	, _screenColumns( 0 )
+	, _terminal( terminal_ ) {
+}
+
+void Prompt::write() {
+	_terminal.write32( _text.get(), _byteCount );
+}
+
+void Prompt::update_screen_columns( void ) {
+	_screenColumns = _terminal.get_screen_columns();
+}
+
+void Prompt::set_text( UnicodeString const& text_ ) {
+	_extraLines = 0;
+	_lastLinePosition = 0;
+	_previousInputLen = 0;
+	_previousLen = 0;
+	_screenColumns = 0;
+	update_screen_columns();
+	// strip control characters from the prompt -- we do allow newline
+	_text = text_;
+	UnicodeString::const_iterator in( text_.begin() );
+	UnicodeString::iterator out( _text.begin() );
+
+	int len = 0;
+	int x = 0;
+
+	bool const strip = !tty::out;
+
+	while (in != text_.end()) {
+		char32_t c = *in;
+		if ('\n' == c || !is_control_code(c)) {
+			*out = c;
+			++out;
+			++in;
+			++len;
+			if ('\n' == c || ++x >= _screenColumns) {
+				x = 0;
+				++_extraLines;
+				_lastLinePosition = len;
+			}
+		} else if (c == '\x1b') {
+			if ( strip ) {
+				// jump over control chars
+				++in;
+				if (*in == '[') {
+					++in;
+					while ( ( in != text_.end() ) && ( ( *in == ';' ) || ( ( ( *in >= '0' ) && ( *in <= '9' ) ) ) ) ) {
+						++in;
+					}
+					if (*in == 'm') {
+						++in;
+					}
+				}
+			} else {
+				// copy control chars
+				*out = *in;
+				++out;
+				++in;
+				if (*in == '[') {
+					*out = *in;
+					++out;
+					++in;
+					while ( ( in != text_.end() ) && ( ( *in == ';' ) || ( ( ( *in >= '0' ) && ( *in <= '9' ) ) ) ) ) {
+						*out = *in;
+						++out;
+						++in;
+					}
+					if (*in == 'm') {
+						*out = *in;
+						++out;
+						++in;
+					}
+				}
+			}
+		} else {
+			++in;
+		}
+	}
+	_characterCount = len;
+	_byteCount = static_cast<int>(out - _text.begin());
+
+	_indentation = len - _lastLinePosition;
+	_cursorRowOffset = _extraLines;
+}
+
+// Used with DynamicPrompt (history search)
+//
+const UnicodeString forwardSearchBasePrompt("(i-search)`");
+const UnicodeString reverseSearchBasePrompt("(reverse-i-search)`");
+const UnicodeString endSearchBasePrompt("': ");
+
+DynamicPrompt::DynamicPrompt( Terminal& terminal_, int initialDirection )
+	: Prompt( terminal_ )
+	, _searchText()
+	, _direction( initialDirection ) {
+	update_screen_columns();
+	_cursorRowOffset = 0;
+	const UnicodeString* basePrompt =
+			(_direction > 0) ? &forwardSearchBasePrompt : &reverseSearchBasePrompt;
+	size_t promptStartLength = basePrompt->length();
+	_characterCount = static_cast<int>(promptStartLength + endSearchBasePrompt.length());
+	_byteCount = _characterCount;
+	_lastLinePosition = _characterCount; // TODO fix this, we are asssuming
+	                                        // that the history prompt won't wrap (!)
+	_previousLen = _characterCount;
+	_text.assign( *basePrompt ).append( endSearchBasePrompt );
+	calculate_screen_position(
+		0, 0, screen_columns(), _characterCount,
+		_indentation, _extraLines
+	);
+}
+
+void DynamicPrompt::updateSearchPrompt(void) {
+	const UnicodeString* basePrompt =
+			(_direction > 0) ? &forwardSearchBasePrompt : &reverseSearchBasePrompt;
+	size_t promptStartLength = basePrompt->length();
+	_characterCount = static_cast<int>(promptStartLength + _searchText.length() +
+																 endSearchBasePrompt.length());
+	_byteCount = _characterCount;
+	_text.assign( *basePrompt ).append( _searchText ).append( endSearchBasePrompt );
+}
+
+}
+

third-party/replxx/src/prompt.hxx

@@ -0,0 +1,47 @@
+#ifndef REPLXX_PROMPT_HXX_INCLUDED
+#define REPLXX_PROMPT_HXX_INCLUDED 1
+
+#include <cstdlib>
+
+#include "unicodestring.hxx"
+#include "terminal.hxx"
+
+namespace replxx {
+
+class Prompt {           // a convenience struct for grouping prompt info
+public:
+	UnicodeString _text;   // our copy of the prompt text, edited
+	int _characterCount;   // chars in _text
+	int _byteCount;        // bytes in _text
+	int _extraLines;       // extra lines (beyond 1) occupied by prompt
+	int _indentation;      // column offset to end of prompt
+	int _lastLinePosition; // index into _text where last line begins
+	int _previousInputLen; // _characterCount of previous input line, for clearing
+	int _cursorRowOffset;  // where the cursor is relative to the start of the prompt
+	int _previousLen;      // help erasing
+private:
+	int _screenColumns;    // width of screen in columns [cache]
+	Terminal& _terminal;
+public:
+	Prompt( Terminal& );
+	void set_text( UnicodeString const& textPtr );
+	void update_screen_columns( void );
+	int screen_columns() const {
+		return ( _screenColumns );
+	}
+	void write();
+};
+
+// changing prompt for "(reverse-i-search)`text':" etc.
+//
+struct DynamicPrompt : public Prompt {
+	UnicodeString _searchText; // text we are searching for
+	int _direction;            // current search _direction, 1=forward, -1=reverse
+
+	DynamicPrompt( Terminal&, int initialDirection );
+	void updateSearchPrompt(void);
+};
+
+}
+
+#endif

third-party/replxx/src/replxx.cxx

@@ -0,0 +1,648 @@
+/*
+ * Copyright (c) 2017-2018, Marcin Konarski (amok at codestation.org)
+ * Copyright (c) 2010, Salvatore Sanfilippo <antirez at gmail dot com>
+ * Copyright (c) 2010, Pieter Noordhuis <pcnoordhuis at gmail dot com>
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *	 * Redistributions of source code must retain the above copyright notice,
+ *		 this list of conditions and the following disclaimer.
+ *	 * Redistributions in binary form must reproduce the above copyright
+ *		 notice, this list of conditions and the following disclaimer in the
+ *		 documentation and/or other materials provided with the distribution.
+ *	 * Neither the name of Redis nor the names of its contributors may be used
+ *		 to endorse or promote products derived from this software without
+ *		 specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ *
+ * line editing lib needs to be 20,000 lines of C code.
+ *
+ * You can find the latest source code at:
+ *
+ *	 http://github.com/antirez/linenoise
+ *
+ * Does a number of crazy assumptions that happen to be true in 99.9999% of
+ * the 2010 UNIX computers around.
+ *
+ * References:
+ * - http://invisible-island.net/xterm/ctlseqs/ctlseqs.html
+ * - http://www.3waylabs.com/nw/WWW/products/wizcon/vt220.html
+ *
+ * Todo list:
+ * - Switch to gets() if $TERM is something we can't support.
+ * - Filter bogus Ctrl+<char> combinations.
+ * - Win32 support
+ *
+ * Bloat:
+ * - Completion?
+ * - History search like Ctrl+r in readline?
+ *
+ * List of escape sequences used by this program, we do everything just
+ * with three sequences. In order to be so cheap we may have some
+ * flickering effect with some slow terminal, but the lesser sequences
+ * the more compatible.
+ *
+ * CHA (Cursor Horizontal Absolute)
+ *		Sequence: ESC [ n G
+ *		Effect: moves cursor to column n (1 based)
+ *
+ * EL (Erase Line)
+ *		Sequence: ESC [ n K
+ *		Effect: if n is 0 or missing, clear from cursor to end of line
+ *		Effect: if n is 1, clear from beginning of line to cursor
+ *		Effect: if n is 2, clear entire line
+ *
+ * CUF (Cursor Forward)
+ *		Sequence: ESC [ n C
+ *		Effect: moves cursor forward of n chars
+ *
+ * The following are used to clear the screen: ESC [ H ESC [ 2 J
+ * This is actually composed of two sequences:
+ *
+ * cursorhome
+ *		Sequence: ESC [ H
+ *		Effect: moves the cursor to upper left corner
+ *
+ * ED2 (Clear entire screen)
+ *		Sequence: ESC [ 2 J
+ *		Effect: clear the whole screen
+ *
+ */
+
+#include <algorithm>
+#include <cstdarg>
+
+#ifdef _WIN32
+
+#include <io.h>
+#define STDIN_FILENO 0
+
+#else /* _WIN32 */
+
+#include <signal.h>
+#include <unistd.h>
+#include <sys/stat.h>
+
+#endif /* _WIN32 */
+
+#include "replxx.h"
+#include "replxx.hxx"
+#include "replxx_impl.hxx"
+#include "history.hxx"
+
+static_assert(
+	static_cast<int>( replxx::Replxx::ACTION::SEND_EOF ) == static_cast<int>( REPLXX_ACTION_SEND_EOF ),
+	"C and C++ `ACTION` APIs are missaligned!"
+);
+
+static_assert(
+	static_cast<int>( replxx::Replxx::KEY::PASTE_FINISH ) == static_cast<int>( REPLXX_KEY_PASTE_FINISH ),
+	"C and C++ `KEY` APIs are missaligned!"
+);
+
+using namespace std;
+using namespace std::placeholders;
+using namespace replxx;
+
+namespace replxx {
+
+namespace {
+void delete_ReplxxImpl( Replxx::ReplxxImpl* impl_ ) {
+	delete impl_;
+}
+}
+
+Replxx::Replxx( void )
+	: _impl( new Replxx::ReplxxImpl( nullptr, nullptr, nullptr ), delete_ReplxxImpl ) {
+}
+
+void Replxx::set_completion_callback( completion_callback_t const& fn ) {
+	_impl->set_completion_callback( fn );
+}
+
+void Replxx::set_modify_callback( modify_callback_t const& fn ) {
+	_impl->set_modify_callback( fn );
+}
+
+void Replxx::set_highlighter_callback( highlighter_callback_t const& fn ) {
+	_impl->set_highlighter_callback( fn );
+}
+
+void Replxx::set_hint_callback( hint_callback_t const& fn ) {
+	_impl->set_hint_callback( fn );
+}
+
+char const* Replxx::input( std::string const& prompt ) {
+	return ( _impl->input( prompt ) );
+}
+
+void Replxx::history_add( std::string const& line ) {
+	_impl->history_add( line );
+}
+
+bool Replxx::history_sync( std::string const& filename ) {
+	return ( _impl->history_sync( filename ) );
+}
+
+bool Replxx::history_save( std::string const& filename ) {
+	return ( _impl->history_save( filename ) );
+}
+
+bool Replxx::history_load( std::string const& filename ) {
+	return ( _impl->history_load( filename ) );
+}
+
+void Replxx::history_clear( void ) {
+	_impl->history_clear();
+}
+
+int Replxx::history_size( void ) const {
+	return ( _impl->history_size() );
+}
+
+Replxx::HistoryScan Replxx::history_scan( void ) const {
+	return ( _impl->history_scan() );
+}
+
+void Replxx::set_preload_buffer( std::string const& preloadText ) {
+	_impl->set_preload_buffer( preloadText );
+}
+
+void Replxx::set_word_break_characters( char const* wordBreakers ) {
+	_impl->set_word_break_characters( wordBreakers );
+}
+
+void Replxx::set_max_hint_rows( int count ) {
+	_impl->set_max_hint_rows( count );
+}
+
+void Replxx::set_hint_delay( int milliseconds ) {
+	_impl->set_hint_delay( milliseconds );
+}
+
+void Replxx::set_completion_count_cutoff( int count ) {
+	_impl->set_completion_count_cutoff( count );
+}
+
+void Replxx::set_double_tab_completion( bool val ) {
+	_impl->set_double_tab_completion( val );
+}
+
+void Replxx::set_complete_on_empty( bool val ) {
+	_impl->set_complete_on_empty( val );
+}
+
+void Replxx::set_beep_on_ambiguous_completion( bool val ) {
+	_impl->set_beep_on_ambiguous_completion( val );
+}
+
+void Replxx::set_immediate_completion( bool val ) {
+	_impl->set_immediate_completion( val );
+}
+
+void Replxx::set_unique_history( bool val ) {
+	_impl->set_unique_history( val );
+}
+
+void Replxx::set_no_color( bool val ) {
+	_impl->set_no_color( val );
+}
+
+void Replxx::set_max_history_size( int len ) {
+	_impl->set_max_history_size( len );
+}
+
+void Replxx::clear_screen( void ) {
+	_impl->clear_screen( 0 );
+}
+
+void Replxx::emulate_key_press( char32_t keyPress_ ) {
+	_impl->emulate_key_press( keyPress_ );
+}
+
+Replxx::ACTION_RESULT Replxx::invoke( ACTION action_, char32_t keyPress_ ) {
+	return ( _impl->invoke( action_, keyPress_ ) );
+}
+
+void Replxx::bind_key( char32_t keyPress_, key_press_handler_t handler_ ) {
+	_impl->bind_key( keyPress_, handler_ );
+}
+
+void Replxx::bind_key_internal( char32_t keyPress_, char const* actionName_ ) {
+	_impl->bind_key_internal( keyPress_, actionName_ );
+}
+
+Replxx::State Replxx::get_state( void ) const {
+	return ( _impl->get_state() );
+}
+
+void Replxx::set_state( Replxx::State const& state_ ) {
+	_impl->set_state( state_ );
+}
+
+int Replxx::install_window_change_handler( void ) {
+	return ( _impl->install_window_change_handler() );
+}
+
+void Replxx::enable_bracketed_paste( void ) {
+	_impl->enable_bracketed_paste();
+}
+
+void Replxx::disable_bracketed_paste( void ) {
+	_impl->disable_bracketed_paste();
+}
+
+void Replxx::print( char const* format_, ... ) {
+	::std::va_list ap;
+	va_start( ap, format_ );
+	int size = static_cast<int>( vsnprintf( nullptr, 0, format_, ap ) );
+	va_end( ap );
+	va_start( ap, format_ );
+	unique_ptr<char[]> buf( new char[size + 1] );
+	vsnprintf( buf.get(), static_cast<size_t>( size + 1 ), format_, ap );
+	va_end( ap );
+	return ( _impl->print( buf.get(), size ) );
+}
+
+void Replxx::write( char const* str, int length ) {
+	return ( _impl->print( str, length ) );
+}
+
+}
+
+::Replxx* replxx_init() {
+	typedef ::Replxx* replxx_data_t;
+	return ( reinterpret_cast<replxx_data_t>( new replxx::Replxx::ReplxxImpl( nullptr, nullptr, nullptr ) ) );
+}
+
+void replxx_end( ::Replxx* replxx_ ) {
+	delete reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ );
+}
+
+void replxx_clear_screen( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->clear_screen( 0 );
+}
+
+void replxx_emulate_key_press( ::Replxx* replxx_, int unsigned keyPress_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->emulate_key_press( keyPress_ );
+}
+
+ReplxxActionResult replxx_invoke( ::Replxx* replxx_, ReplxxAction action_, int unsigned keyPress_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( static_cast<ReplxxActionResult>( replxx->invoke( static_cast<replxx::Replxx::ACTION>( action_ ), keyPress_ ) ) );
+}
+
+replxx::Replxx::ACTION_RESULT key_press_handler_forwarder( key_press_handler_t handler_, char32_t code_, void* userData_ ) {
+	return ( static_cast<replxx::Replxx::ACTION_RESULT>( handler_( code_, userData_ ) ) );
+}
+
+void replxx_bind_key( ::Replxx* replxx_, int code_, key_press_handler_t handler_, void* userData_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->bind_key( code_, std::bind( key_press_handler_forwarder, handler_, _1, userData_ ) );
+}
+
+int replxx_bind_key_internal( ::Replxx* replxx_, int code_, char const* actionName_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	try {
+		replxx->bind_key_internal( code_, actionName_ );
+	} catch ( ... ) {
+		return ( -1 );
+	}
+	return ( 0 );
+}
+
+void replxx_get_state( ::Replxx* replxx_, ReplxxState* state ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx::Replxx::State s( replxx->get_state() );
+	state->text = s.text();
+	state->cursorPosition = s.cursor_position();
+}
+
+void replxx_set_state( ::Replxx* replxx_, ReplxxState* state ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_state( replxx::Replxx::State( state->text, state->cursorPosition ) );
+}
+
+/**
+ * replxx_set_preload_buffer provides text to be inserted into the command buffer
+ *
+ * the provided text will be processed to be usable and will be used to preload
+ * the input buffer on the next call to replxx_input()
+ *
+ * @param preloadText text to begin with on the next call to replxx_input()
+ */
+void replxx_set_preload_buffer(::Replxx* replxx_, const char* preloadText) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_preload_buffer( preloadText ? preloadText : "" );
+}
+
+/**
+ * replxx_input is a readline replacement.
+ *
+ * call it with a prompt to display and it will return a line of input from the
+ * user
+ *
+ * @param prompt text of prompt to display to the user
+ * @return the returned string is managed by replxx library
+ * and it must NOT be freed in the client.
+ */
+char const* replxx_input( ::Replxx* replxx_, const char* prompt ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->input( prompt ) );
+}
+
+int replxx_print( ::Replxx* replxx_, char const* format_, ... ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	::std::va_list ap;
+	va_start( ap, format_ );
+	int size = static_cast<int>( vsnprintf( nullptr, 0, format_, ap ) );
+	va_end( ap );
+	va_start( ap, format_ );
+	unique_ptr<char[]> buf( new char[size + 1] );
+	vsnprintf( buf.get(), static_cast<size_t>( size + 1 ), format_, ap );
+	va_end( ap );
+	try {
+		replxx->print( buf.get(), size );
+	} catch ( ... ) {
+		return ( -1 );
+	}
+	return ( size );
+}
+
+int replxx_write( ::Replxx* replxx_, char const* str, int length ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	try {
+		replxx->print( str, length );
+	} catch ( ... ) {
+		return ( -1 );
+	}
+	return static_cast<int>( length );
+}
+
+struct replxx_completions {
+	replxx::Replxx::completions_t data;
+};
+
+struct replxx_hints {
+	replxx::Replxx::hints_t data;
+};
+
+void modify_fwd( replxx_modify_callback_t fn, std::string& line_, int& cursorPosition_, void* userData_ ) {
+#ifdef _WIN32
+#define strdup _strdup
+#endif
+	char* s( strdup( line_.c_str() ) );
+#undef strdup
+	fn( &s, &cursorPosition_, userData_ );
+	line_ = s;
+	free( s );
+	return;
+}
+
+void replxx_set_modify_callback(::Replxx* replxx_, replxx_modify_callback_t* fn, void* userData) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_modify_callback( std::bind( &modify_fwd, fn, _1, _2, userData ) );
+}
+
+replxx::Replxx::completions_t completions_fwd( replxx_completion_callback_t fn, std::string const& input_, int& contextLen_, void* userData ) {
+	replxx_completions completions;
+	fn( input_.c_str(), &completions, &contextLen_, userData );
+	return ( completions.data );
+}
+
+/* Register a callback function to be called for tab-completion. */
+void replxx_set_completion_callback(::Replxx* replxx_, replxx_completion_callback_t* fn, void* userData) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_completion_callback( std::bind( &completions_fwd, fn, _1, _2, userData ) );
+}
+
+void highlighter_fwd( replxx_highlighter_callback_t fn, std::string const& input, replxx::Replxx::colors_t& colors, void* userData ) {
+	std::vector<ReplxxColor> colorsTmp( colors.size() );
+	std::transform(
+		colors.begin(),
+		colors.end(),
+		colorsTmp.begin(),
+		[]( replxx::Replxx::Color c ) {
+			return ( static_cast<ReplxxColor>( c ) );
+		}
+	);
+	fn( input.c_str(), colorsTmp.data(), static_cast<int>( colors.size() ), userData );
+	std::transform(
+		colorsTmp.begin(),
+		colorsTmp.end(),
+		colors.begin(),
+		[]( ReplxxColor c ) {
+			return ( static_cast<replxx::Replxx::Color>( c ) );
+		}
+	);
+}
+
+void replxx_set_highlighter_callback( ::Replxx* replxx_, replxx_highlighter_callback_t* fn, void* userData ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_highlighter_callback( std::bind( &highlighter_fwd, fn, _1, _2, userData ) );
+}
+
+replxx::Replxx::hints_t hints_fwd( replxx_hint_callback_t fn, std::string const& input_, int& contextLen_, replxx::Replxx::Color& color_, void* userData ) {
+	replxx_hints hints;
+	ReplxxColor c( static_cast<ReplxxColor>( color_ ) );
+	fn( input_.c_str(), &hints, &contextLen_, &c, userData );
+	return ( hints.data );
+}
+
+void replxx_set_hint_callback( ::Replxx* replxx_, replxx_hint_callback_t* fn, void* userData ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_hint_callback( std::bind( &hints_fwd, fn, _1, _2, _3, userData ) );
+}
+
+void replxx_add_hint(replxx_hints* lh, const char* str) {
+	lh->data.emplace_back(str);
+}
+
+void replxx_add_completion( replxx_completions* lc, const char* str ) {
+	lc->data.emplace_back( str );
+}
+
+void replxx_add_completion( replxx_completions* lc, const char* str, ReplxxColor color ) {
+	lc->data.emplace_back( str, static_cast<replxx::Replxx::Color>( color ) );
+}
+
+void replxx_history_add( ::Replxx* replxx_, const char* line ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->history_add( line );
+}
+
+void replxx_set_max_history_size( ::Replxx* replxx_, int len ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_max_history_size( len );
+}
+
+void replxx_set_max_hint_rows( ::Replxx* replxx_, int count ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_max_hint_rows( count );
+}
+
+void replxx_set_hint_delay( ::Replxx* replxx_, int milliseconds ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_hint_delay( milliseconds );
+}
+
+void replxx_set_completion_count_cutoff( ::Replxx* replxx_, int count ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_completion_count_cutoff( count );
+}
+
+void replxx_set_word_break_characters( ::Replxx* replxx_, char const* breakChars_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_word_break_characters( breakChars_ );
+}
+
+void replxx_set_double_tab_completion( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_double_tab_completion( val ? true : false );
+}
+
+void replxx_set_complete_on_empty( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_complete_on_empty( val ? true : false );
+}
+
+void replxx_set_no_color( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_no_color( val ? true : false );
+}
+
+void replxx_set_beep_on_ambiguous_completion( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_beep_on_ambiguous_completion( val ? true : false );
+}
+
+void replxx_set_immediate_completion( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_immediate_completion( val ? true : false );
+}
+
+void replxx_set_unique_history( ::Replxx* replxx_, int val ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->set_unique_history( val ? true : false );
+}
+
+void replxx_enable_bracketed_paste( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->enable_bracketed_paste();
+}
+
+void replxx_disable_bracketed_paste( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->disable_bracketed_paste();
+}
+
+ReplxxHistoryScan* replxx_history_scan_start( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( reinterpret_cast<ReplxxHistoryScan*>( replxx->history_scan().release() ) );
+}
+
+void replxx_history_scan_stop( ::Replxx*, ReplxxHistoryScan* historyScan_ ) {
+	delete reinterpret_cast<replxx::Replxx::HistoryScanImpl*>( historyScan_ );
+}
+
+int replxx_history_scan_next( ::Replxx*, ReplxxHistoryScan* historyScan_, ReplxxHistoryEntry* historyEntry_ ) {
+	replxx::Replxx::HistoryScanImpl* historyScan( reinterpret_cast<replxx::Replxx::HistoryScanImpl*>( historyScan_ ) );
+	bool hasNext( historyScan->next() );
+	if ( hasNext ) {
+		replxx::Replxx::HistoryEntry const& historyEntry( historyScan->get() );
+		historyEntry_->timestamp = historyEntry.timestamp().c_str();
+		historyEntry_->text = historyEntry.text().c_str();
+	}
+	return ( hasNext ? 0 : -1 );
+}
+
+/* Save the history in the specified file. On success 0 is returned
+ * otherwise -1 is returned. */
+int replxx_history_sync( ::Replxx* replxx_, const char* filename ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->history_sync( filename ) ? 0 : -1 );
+}
+
+/* Save the history in the specified file. On success 0 is returned
+ * otherwise -1 is returned. */
+int replxx_history_save( ::Replxx* replxx_, const char* filename ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->history_save( filename ) ? 0 : -1 );
+}
+
+/* Load the history from the specified file. If the file does not exist
+ * zero is returned and no operation is performed.
+ *
+ * If the file exists and the operation succeeded 0 is returned, otherwise
+ * on error -1 is returned. */
+int replxx_history_load( ::Replxx* replxx_, const char* filename ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->history_load( filename ) ? 0 : -1 );
+}
+
+void replxx_history_clear( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	replxx->history_clear();
+}
+
+int replxx_history_size( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->history_size() );
+}
+
+/* This special mode is used by replxx in order to print scan codes
+ * on screen for debugging / development purposes. It is implemented
+ * by the replxx-c-api-example program using the --keycodes option. */
+#ifdef __REPLXX_DEBUG__
+void replxx_debug_dump_print_codes(void) {
+	char quit[4];
+
+	printf(
+			"replxx key codes debugging mode.\n"
+			"Press keys to see scan codes. Type 'quit' at any time to exit.\n");
+	if (enableRawMode() == -1) return;
+	memset(quit, ' ', 4);
+	while (1) {
+		char c;
+		int nread;
+
+#if _WIN32
+		nread = _read(STDIN_FILENO, &c, 1);
+#else
+		nread = read(STDIN_FILENO, &c, 1);
+#endif
+		if (nread <= 0) continue;
+		memmove(quit, quit + 1, sizeof(quit) - 1); /* shift string to left. */
+		quit[sizeof(quit) - 1] = c; /* Insert current char on the right. */
+		if (memcmp(quit, "quit", sizeof(quit)) == 0) break;
+
+		printf("'%c' %02x (%d) (type quit to exit)\n", isprint(c) ? c : '?', (int)c,
+					 (int)c);
+		printf("\r"); /* Go left edge manually, we are in raw mode. */
+		fflush(stdout);
+	}
+	disableRawMode();
+}
+#endif // __REPLXX_DEBUG__
+
+int replxx_install_window_change_handler( ::Replxx* replxx_ ) {
+	replxx::Replxx::ReplxxImpl* replxx( reinterpret_cast<replxx::Replxx::ReplxxImpl*>( replxx_ ) );
+	return ( replxx->install_window_change_handler() );
+}
+

third-party/replxx/src/replxx_impl.hxx

@@ -0,0 +1,270 @@
+/*
+ * Copyright (c) 2017-2018, Marcin Konarski (amok at codestation.org)
+ *
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted provided that the following conditions are met:
+ *
+ *   * Redistributions of source code must retain the above copyright notice,
+ *     this list of conditions and the following disclaimer.
+ *   * Redistributions in binary form must reproduce the above copyright
+ *     notice, this list of conditions and the following disclaimer in the
+ *     documentation and/or other materials provided with the distribution.
+ *   * Neither the name of Redis nor the names of its contributors may be used
+ *     to endorse or promote products derived from this software without
+ *     specific prior written permission.
+ *
+ * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS"
+ * AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
+ * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
+ * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR CONTRIBUTORS BE
+ * LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
+ * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
+ * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
+ * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
+ * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
+ * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
+ * POSSIBILITY OF SUCH DAMAGE.
+ */
+
+#ifndef HAVE_REPLXX_REPLXX_IMPL_HXX_INCLUDED
+#define HAVE_REPLXX_REPLXX_IMPL_HXX_INCLUDED 1
+
+#include <vector>
+#include <deque>
+#include <memory>
+#include <string>
+#include <unordered_map>
+#include <thread>
+#include <mutex>
+#include <chrono>
+
+#include "replxx.hxx"
+#include "history.hxx"
+#include "killring.hxx"
+#include "utf8string.hxx"
+#include "prompt.hxx"
+
+namespace replxx {
+
+class Replxx::ReplxxImpl {
+public:
+	class Completion {
+		UnicodeString _text;
+		Replxx::Color _color;
+	public:
+		Completion( UnicodeString const& text_, Replxx::Color color_ )
+			: _text( text_ )
+			, _color( color_ ) {
+		}
+		Completion( Replxx::Completion const& completion_ )
+			: _text( completion_.text() )
+			, _color( completion_.color() ) {
+		}
+		Completion( Completion const& ) = default;
+		Completion& operator = ( Completion const& ) = default;
+		Completion( Completion&& ) = default;
+		Completion& operator = ( Completion&& ) = default;
+		UnicodeString const& text( void ) const {
+			return ( _text );
+		}
+		Replxx::Color color( void ) const {
+			return ( _color );
+		}
+	};
+	typedef std::vector<Completion> completions_t;
+	typedef std::vector<UnicodeString> hints_t;
+	typedef std::unique_ptr<char[]> utf8_buffer_t;
+	typedef std::unique_ptr<char32_t[]> input_buffer_t;
+	typedef std::vector<char> char_widths_t;
+	typedef std::vector<char32_t> display_t;
+	typedef std::deque<char32_t> key_presses_t;
+	typedef std::deque<std::string> messages_t;
+	enum class HINT_ACTION {
+		REGENERATE,
+		REPAINT,
+		TRIM,
+		SKIP
+	};
+	typedef std::unordered_map<std::string, Replxx::key_press_handler_t> named_actions_t;
+	typedef Replxx::ACTION_RESULT ( ReplxxImpl::* key_press_handler_raw_t )( char32_t );
+	typedef std::unordered_map<int, Replxx::key_press_handler_t> key_press_handlers_t;
+private:
+	typedef int long long unsigned action_trait_t;
+	static action_trait_t const NOOP                       =  0;
+	static action_trait_t const WANT_REFRESH               =  1;
+	static action_trait_t const RESET_KILL_ACTION          =  2;
+	static action_trait_t const SET_KILL_ACTION            =  4;
+	static action_trait_t const DONT_RESET_PREFIX          =  8;
+	static action_trait_t const DONT_RESET_COMPLETIONS     = 16;
+	static action_trait_t const HISTORY_RECALL_MOST_RECENT = 32;
+	static action_trait_t const DONT_RESET_HIST_YANK_INDEX = 64;
+private:
+	mutable Utf8String     _utf8Buffer;
+	UnicodeString  _data;
+	char_widths_t  _charWidths; // character widths from mk_wcwidth()
+	display_t      _display;
+	int _displayInputLength;
+	UnicodeString  _hint;
+	int _pos;    // character position in buffer ( 0 <= _pos <= _len )
+	int _prefix; // prefix length used in common prefix search
+	int _hintSelection; // Currently selected hint.
+	History _history;
+	KillRing _killRing;
+	int long long _lastRefreshTime;
+	bool _refreshSkipped;
+	int _lastYankSize;
+	int _maxHintRows;
+	int _hintDelay;
+	std::string _breakChars;
+	int _completionCountCutoff;
+	bool _overwrite;
+	bool _doubleTabCompletion;
+	bool _completeOnEmpty;
+	bool _beepOnAmbiguousCompletion;
+	bool _immediateCompletion;
+	bool _bracketedPaste;
+	bool _noColor;
+	named_actions_t _namedActions;
+	key_press_handlers_t _keyPressHandlers;
+	Terminal _terminal;
+	std::thread::id _currentThread;
+	Prompt _prompt;
+	Replxx::modify_callback_t _modifyCallback;
+	Replxx::completion_callback_t _completionCallback;
+	Replxx::highlighter_callback_t _highlighterCallback;
+	Replxx::hint_callback_t _hintCallback;
+	key_presses_t _keyPresses;
+	messages_t _messages;
+	completions_t _completions;
+	int _completionContextLength;
+	int _completionSelection;
+	std::string _preloadedBuffer; // used with set_preload_buffer
+	std::string _errorMessage;
+	UnicodeString _previousSearchText; // remembered across invocations of replxx_input()
+	bool _modifiedState;
+	Replxx::Color _hintColor;
+	hints_t _hintsCache;
+	int _hintContextLenght;
+	Utf8String _hintSeed;
+	mutable std::mutex _mutex;
+public:
+	ReplxxImpl( FILE*, FILE*, FILE* );
+	virtual ~ReplxxImpl( void );
+	void set_modify_callback( Replxx::modify_callback_t const& fn );
+	void set_completion_callback( Replxx::completion_callback_t const& fn );
+	void set_highlighter_callback( Replxx::highlighter_callback_t const& fn );
+	void set_hint_callback( Replxx::hint_callback_t const& fn );
+	char const* input( std::string const& prompt );
+	void history_add( std::string const& line );
+	bool history_sync( std::string const& filename );
+	bool history_save( std::string const& filename );
+	bool history_load( std::string const& filename );
+	void history_clear( void );
+	Replxx::HistoryScan::impl_t history_scan( void ) const;
+	int history_size( void ) const;
+	void set_preload_buffer(std::string const& preloadText);
+	void set_word_break_characters( char const* wordBreakers );
+	void set_max_hint_rows( int count );
+	void set_hint_delay( int milliseconds );
+	void set_double_tab_completion( bool val );
+	void set_complete_on_empty( bool val );
+	void set_beep_on_ambiguous_completion( bool val );
+	void set_immediate_completion( bool val );
+	void set_unique_history( bool );
+	void set_no_color( bool val );
+	void set_max_history_size( int len );
+	void set_completion_count_cutoff( int len );
+	int install_window_change_handler( void );
+	void enable_bracketed_paste( void );
+	void disable_bracketed_paste( void );
+	void print( char const*, int );
+	Replxx::ACTION_RESULT clear_screen( char32_t );
+	void emulate_key_press( char32_t );
+	Replxx::ACTION_RESULT invoke( Replxx::ACTION, char32_t );
+	void bind_key( char32_t, Replxx::key_press_handler_t );
+	void bind_key_internal( char32_t, char const* );
+	Replxx::State get_state( void ) const;
+	void set_state( Replxx::State const& );
+private:
+	ReplxxImpl( ReplxxImpl const& ) = delete;
+	ReplxxImpl& operator = ( ReplxxImpl const& ) = delete;
+private:
+	void preload_puffer( char const* preloadText );
+	int get_input_line( void );
+	Replxx::ACTION_RESULT action( action_trait_t, key_press_handler_raw_t const&, char32_t );
+	Replxx::ACTION_RESULT insert_character( char32_t );
+	Replxx::ACTION_RESULT go_to_begining_of_line( char32_t );
+	Replxx::ACTION_RESULT go_to_end_of_line( char32_t );
+	Replxx::ACTION_RESULT move_one_char_left( char32_t );
+	Replxx::ACTION_RESULT move_one_char_right( char32_t );
+	Replxx::ACTION_RESULT move_one_word_left( char32_t );
+	Replxx::ACTION_RESULT move_one_word_right( char32_t );
+	Replxx::ACTION_RESULT kill_word_to_left( char32_t );
+	Replxx::ACTION_RESULT kill_word_to_right( char32_t );
+	Replxx::ACTION_RESULT kill_to_whitespace_to_left( char32_t );
+	Replxx::ACTION_RESULT kill_to_begining_of_line( char32_t );
+	Replxx::ACTION_RESULT kill_to_end_of_line( char32_t );
+	Replxx::ACTION_RESULT yank( char32_t );
+	Replxx::ACTION_RESULT yank_cycle( char32_t );
+	Replxx::ACTION_RESULT yank_last_arg( char32_t );
+	Replxx::ACTION_RESULT capitalize_word( char32_t );
+	Replxx::ACTION_RESULT lowercase_word( char32_t );
+	Replxx::ACTION_RESULT uppercase_word( char32_t );
+	Replxx::ACTION_RESULT transpose_characters( char32_t );
+	Replxx::ACTION_RESULT abort_line( char32_t );
+	Replxx::ACTION_RESULT send_eof( char32_t );
+	Replxx::ACTION_RESULT delete_character( char32_t );
+	Replxx::ACTION_RESULT backspace_character( char32_t );
+	Replxx::ACTION_RESULT commit_line( char32_t );
+	Replxx::ACTION_RESULT history_next( char32_t );
+	Replxx::ACTION_RESULT history_previous( char32_t );
+	Replxx::ACTION_RESULT history_move( bool );
+	Replxx::ACTION_RESULT history_first( char32_t );
+	Replxx::ACTION_RESULT history_last( char32_t );
+	Replxx::ACTION_RESULT history_jump( bool );
+	Replxx::ACTION_RESULT hint_next( char32_t );
+	Replxx::ACTION_RESULT hint_previous( char32_t );
+	Replxx::ACTION_RESULT hint_move( bool );
+	Replxx::ACTION_RESULT toggle_overwrite_mode( char32_t );
+#ifndef _WIN32
+	Replxx::ACTION_RESULT verbatim_insert( char32_t );
+	Replxx::ACTION_RESULT suspend( char32_t );
+#endif
+	Replxx::ACTION_RESULT complete_line( char32_t );
+	Replxx::ACTION_RESULT complete_next( char32_t );
+	Replxx::ACTION_RESULT complete_previous( char32_t );
+	Replxx::ACTION_RESULT complete( bool );
+	Replxx::ACTION_RESULT incremental_history_search( char32_t startChar );
+	Replxx::ACTION_RESULT common_prefix_search( char32_t startChar );
+	Replxx::ACTION_RESULT bracketed_paste( char32_t startChar );
+	char32_t read_char( HINT_ACTION = HINT_ACTION::SKIP );
+	char const* read_from_stdin( void );
+	char32_t do_complete_line( bool );
+	void call_modify_callback( void );
+	completions_t call_completer( std::string const& input, int& ) const;
+	hints_t call_hinter( std::string const& input, int&, Replxx::Color& color ) const;
+	void refresh_line( HINT_ACTION = HINT_ACTION::REGENERATE );
+	void render( char32_t );
+	void render( HINT_ACTION );
+	int handle_hints( HINT_ACTION );
+	void set_color( Replxx::Color );
+	int context_length( void );
+	void clear( void );
+	void repaint( void );
+	bool is_word_break_character( char32_t ) const;
+	void dynamicRefresh(Prompt& pi, char32_t* buf32, int len, int pos);
+	char const* finalize_input( char const* );
+	void clear_self_to_end_of_screen( Prompt const* = nullptr );
+	typedef struct {
+		int index;
+		bool error;
+	} paren_info_t;
+	paren_info_t matching_paren( void );
+};
+
+}
+
+#endif
+

third-party/replxx/src/terminal.cxx

@@ -0,0 +1,742 @@
+#include <memory>
+#include <cerrno>
+#include <cstdlib>
+#include <cstring>
+#include <array>
+#include <stdexcept>
+
+#ifdef _WIN32
+
+#include <conio.h>
+#include <windows.h>
+#include <io.h>
+#define isatty _isatty
+#define strcasecmp _stricmp
+#define strdup _strdup
+#define write _write
+#define STDIN_FILENO 0
+
+#ifndef ENABLE_VIRTUAL_TERMINAL_PROCESSING
+static DWORD const ENABLE_VIRTUAL_TERMINAL_PROCESSING = 4;
+#endif
+
+#include "windows.hxx"
+
+#else /* _WIN32 */
+
+#include <unistd.h>
+#include <sys/ioctl.h>
+#include <sys/select.h>
+#include <fcntl.h>
+#include <signal.h>
+
+#endif /* _WIN32 */
+
+#include "terminal.hxx"
+#include "conversion.hxx"
+#include "escape.hxx"
+#include "replxx.hxx"
+#include "util.hxx"
+
+using namespace std;
+
+namespace replxx {
+
+namespace tty {
+
+bool is_a_tty( int fd_ ) {
+	bool aTTY( isatty( fd_ ) != 0 );
+#ifdef _WIN32
+	do {
+		if ( aTTY ) {
+			break;
+		}
+		HANDLE h( (HANDLE)_get_osfhandle( fd_ ) );
+		if ( h == INVALID_HANDLE_VALUE ) {
+			break;
+		}
+		DWORD st( 0 );
+		if ( ! GetConsoleMode( h, &st ) ) {
+			break;
+		}
+		aTTY = true;
+	} while ( false );
+#endif
+	return ( aTTY );
+}
+
+bool in( is_a_tty( 0 ) );
+bool out( is_a_tty( 1 ) );
+
+}
+
+#ifndef _WIN32
+Terminal* _terminal_ = nullptr;
+static void WindowSizeChanged( int ) {
+	if ( ! _terminal_ ) {
+		return;
+	}
+	_terminal_->notify_event( Terminal::EVENT_TYPE::RESIZE );
+}
+#endif
+
+
+Terminal::Terminal( void )
+#ifdef _WIN32
+	: _consoleOut( INVALID_HANDLE_VALUE )
+	, _consoleIn( INVALID_HANDLE_VALUE )
+	, _origOutMode()
+	, _origInMode()
+	, _oldDisplayAttribute()
+	, _inputCodePage( GetConsoleCP() )
+	, _outputCodePage( GetConsoleOutputCP() )
+	, _interrupt( INVALID_HANDLE_VALUE )
+	, _events()
+	, _empty()
+#else
+	: _origTermios()
+	, _interrupt()
+#endif
+	, _rawMode( false )
+	, _utf8() {
+#ifdef _WIN32
+	_interrupt = CreateEvent( nullptr, true, false, TEXT( "replxx_interrupt_event" ) );
+#else
+	static_cast<void>( ::pipe( _interrupt ) == 0 );
+#endif
+}
+
+Terminal::~Terminal( void ) {
+	if ( _rawMode ) {
+		disable_raw_mode();
+	}
+#ifdef _WIN32
+	CloseHandle( _interrupt );
+#else
+	static_cast<void>( ::close( _interrupt[0] ) == 0 );
+	static_cast<void>( ::close( _interrupt[1] ) == 0 );
+#endif
+}
+
+void Terminal::write32( char32_t const* text32, int len32 ) {
+	_utf8.assign( text32, len32 );
+	write8( _utf8.get(), _utf8.size() );
+	return;
+}
+
+void Terminal::write8( char const* data_, int size_ ) {
+#ifdef _WIN32
+	if ( ! _rawMode ) {
+		enable_out();
+	}
+	int nWritten( win_write( _consoleOut, _autoEscape, data_, size_ ) );
+	if ( ! _rawMode ) {
+		disable_out();
+	}
+#else
+	int nWritten( write( 1, data_, size_ ) );
+#endif
+	if ( nWritten != size_ ) {
+		throw std::runtime_error( "write failed" );
+	}
+	return;
+}
+
+int Terminal::get_screen_columns( void ) {
+	int cols( 0 );
+#ifdef _WIN32
+	CONSOLE_SCREEN_BUFFER_INFO inf;
+	GetConsoleScreenBufferInfo( _consoleOut, &inf );
+	cols = inf.dwSize.X;
+#else
+	struct winsize ws;
+	cols = ( ioctl( 1, TIOCGWINSZ, &ws ) == -1 ) ? 80 : ws.ws_col;
+#endif
+	// cols is 0 in certain circumstances like inside debugger, which creates
+	// further issues
+	return ( cols > 0 ) ? cols : 80;
+}
+
+int Terminal::get_screen_rows( void ) {
+	int rows;
+#ifdef _WIN32
+	CONSOLE_SCREEN_BUFFER_INFO inf;
+	GetConsoleScreenBufferInfo( _consoleOut, &inf );
+	rows = 1 + inf.srWindow.Bottom - inf.srWindow.Top;
+#else
+	struct winsize ws;
+	rows = (ioctl(1, TIOCGWINSZ, &ws) == -1) ? 24 : ws.ws_row;
+#endif
+	return (rows > 0) ? rows : 24;
+}
+
+namespace {
+inline int notty( void ) {
+	errno = ENOTTY;
+	return ( -1 );
+}
+}
+
+void Terminal::enable_out( void ) {
+#ifdef _WIN32
+	_consoleOut = GetStdHandle( STD_OUTPUT_HANDLE );
+	SetConsoleOutputCP( 65001 );
+	GetConsoleMode( _consoleOut, &_origOutMode );
+	_autoEscape = SetConsoleMode( _consoleOut, _origOutMode | ENABLE_VIRTUAL_TERMINAL_PROCESSING ) != 0;
+#endif
+}
+
+void Terminal::disable_out( void ) {
+#ifdef _WIN32
+	SetConsoleMode( _consoleOut, _origOutMode );
+	SetConsoleOutputCP( _outputCodePage );
+	_consoleOut = INVALID_HANDLE_VALUE;
+	_autoEscape = false;
+#endif
+}
+
+void Terminal::enable_bracketed_paste( void ) {
+	static char const  BRACK_PASTE_INIT[] = "\033[?2004h";
+	write8( BRACK_PASTE_INIT, sizeof ( BRACK_PASTE_INIT ) - 1 );
+}
+
+void Terminal::disable_bracketed_paste( void ) {
+	static char const  BRACK_PASTE_DISABLE[] = "\033[?2004l";
+	write8( BRACK_PASTE_DISABLE, sizeof ( BRACK_PASTE_DISABLE ) - 1 );
+}
+
+int Terminal::enable_raw_mode( void ) {
+	if ( ! _rawMode ) {
+#ifdef _WIN32
+		_consoleIn = GetStdHandle( STD_INPUT_HANDLE );
+		SetConsoleCP( 65001 );
+		GetConsoleMode( _consoleIn, &_origInMode );
+		SetConsoleMode(
+			_consoleIn,
+			_origInMode & ~( ENABLE_LINE_INPUT | ENABLE_ECHO_INPUT | ENABLE_PROCESSED_INPUT )
+		);
+		enable_out();
+#else
+		struct termios raw;
+
+		if ( ! tty::in ) {
+			return ( notty() );
+		}
+		if ( tcgetattr( 0, &_origTermios ) == -1 ) {
+			return ( notty() );
+		}
+
+		raw = _origTermios; /* modify the original mode */
+		/* input modes: no break, no CR to NL, no parity check, no strip char,
+		 * no start/stop output control. */
+		raw.c_iflag &= ~(BRKINT | ICRNL | INPCK | ISTRIP | IXON);
+		/* output modes - disable post processing */
+		// this is wrong, we don't want raw output, it turns newlines into straight
+		// linefeeds
+		// raw.c_oflag &= ~(OPOST);
+		/* control modes - set 8 bit chars */
+		raw.c_cflag |= (CS8);
+		/* local modes - echoing off, canonical off, no extended functions,
+		 * no signal chars (^Z,^C) */
+		raw.c_lflag &= ~(ECHO | ICANON | IEXTEN | ISIG);
+		/* control chars - set return condition: min number of bytes and timer.
+		 * We want read to return every single byte, without timeout. */
+		raw.c_cc[VMIN] = 1;
+		raw.c_cc[VTIME] = 0; /* 1 byte, no timer */
+
+		/* put terminal in raw mode after flushing */
+		if ( tcsetattr(0, TCSADRAIN, &raw) < 0 ) {
+			return ( notty() );
+		}
+		_terminal_ = this;
+#endif
+		_rawMode = true;
+	}
+	return ( 0 );
+}
+
+void Terminal::disable_raw_mode(void) {
+	if ( _rawMode ) {
+#ifdef _WIN32
+		disable_out();
+		SetConsoleMode( _consoleIn, _origInMode );
+		SetConsoleCP( _inputCodePage );
+		_consoleIn = INVALID_HANDLE_VALUE;
+#else
+		_terminal_ = nullptr;
+		if ( tcsetattr( 0, TCSADRAIN, &_origTermios ) == -1 ) {
+			return;
+		}
+#endif
+		_rawMode = false;
+	}
+}
+
+#ifndef _WIN32
+
+/**
+ * Read a UTF-8 sequence from the non-Windows keyboard and return the Unicode
+ * (char32_t) character it encodes
+ *
+ * @return char32_t Unicode character
+ */
+char32_t read_unicode_character(void) {
+	static char8_t utf8String[5];
+	static size_t utf8Count = 0;
+	while (true) {
+		char8_t c;
+
+		/* Continue reading if interrupted by signal. */
+		ssize_t nread;
+		do {
+			nread = read( STDIN_FILENO, &c, 1 );
+		} while ((nread == -1) && (errno == EINTR));
+
+		if (nread <= 0) return 0;
+		if (c <= 0x7F || locale::is8BitEncoding) { // short circuit ASCII
+			utf8Count = 0;
+			return c;
+		} else if (utf8Count < sizeof(utf8String) - 1) {
+			utf8String[utf8Count++] = c;
+			utf8String[utf8Count] = 0;
+			char32_t unicodeChar[2];
+			int ucharCount( 0 );
+			ConversionResult res = copyString8to32(unicodeChar, 2, ucharCount, utf8String);
+			if (res == conversionOK && ucharCount) {
+				utf8Count = 0;
+				return unicodeChar[0];
+			}
+		} else {
+			utf8Count = 0; // this shouldn't happen: got four bytes but no UTF-8 character
+		}
+	}
+}
+
+#endif // #ifndef _WIN32
+
+void beep() {
+	fprintf(stderr, "\x7");	// ctrl-G == bell/beep
+	fflush(stderr);
+}
+
+// replxx_read_char -- read a keystroke or keychord from the keyboard, and translate it
+// into an encoded "keystroke".	When convenient, extended keys are translated into their
+// simpler Emacs keystrokes, so an unmodified "left arrow" becomes Ctrl-B.
+//
+// A return value of zero means "no input available", and a return value of -1
+// means "invalid key".
+//
+char32_t Terminal::read_char( void ) {
+	char32_t c( 0 );
+#ifdef _WIN32
+	INPUT_RECORD rec;
+	DWORD count;
+	char32_t modifierKeys = 0;
+	bool escSeen = false;
+	int highSurrogate( 0 );
+	while (true) {
+		ReadConsoleInputW( _consoleIn, &rec, 1, &count );
+#if __REPLXX_DEBUG__	// helper for debugging keystrokes, display info in the debug "Output"
+		// window in the debugger
+		{
+			if ( rec.EventType == KEY_EVENT ) {
+				//if ( rec.Event.KeyEvent.uChar.UnicodeChar ) {
+				char buf[1024];
+				sprintf(
+					buf,
+					"Unicode character 0x%04X, repeat count %d, virtual keycode 0x%04X, "
+					"virtual scancode 0x%04X, key %s%s%s%s%s\n",
+					rec.Event.KeyEvent.uChar.UnicodeChar,
+					rec.Event.KeyEvent.wRepeatCount,
+					rec.Event.KeyEvent.wVirtualKeyCode,
+					rec.Event.KeyEvent.wVirtualScanCode,
+					rec.Event.KeyEvent.bKeyDown ? "down" : "up",
+					(rec.Event.KeyEvent.dwControlKeyState & LEFT_CTRL_PRESSED) ? " L-Ctrl" : "",
+					(rec.Event.KeyEvent.dwControlKeyState & RIGHT_CTRL_PRESSED) ? " R-Ctrl" : "",
+					(rec.Event.KeyEvent.dwControlKeyState & LEFT_ALT_PRESSED) ? " L-Alt" : "",
+					(rec.Event.KeyEvent.dwControlKeyState & RIGHT_ALT_PRESSED) ? " R-Alt" : ""
+				);
+				OutputDebugStringA( buf );
+				//}
+			}
+		}
+#endif
+		if ( rec.EventType != KEY_EVENT ) {
+			continue;
+		}
+		// Windows provides for entry of characters that are not on your keyboard by sending the
+		// Unicode characters as a "key up" with virtual keycode 0x12 (VK_MENU == Alt key) ...
+		// accept these characters, otherwise only process characters on "key down"
+		if ( !rec.Event.KeyEvent.bKeyDown && ( rec.Event.KeyEvent.wVirtualKeyCode != VK_MENU ) ) {
+			continue;
+		}
+		modifierKeys = 0;
+		// AltGr is encoded as ( LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED ), so don't treat this
+		// combination as either CTRL or META we just turn off those two bits, so it is still
+		// possible to combine CTRL and/or META with an AltGr key by using right-Ctrl and/or
+		// left-Alt
+		DWORD const AltGr( LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED );
+		if ( ( rec.Event.KeyEvent.dwControlKeyState & AltGr ) == AltGr ) {
+			rec.Event.KeyEvent.dwControlKeyState &= ~( LEFT_CTRL_PRESSED | RIGHT_ALT_PRESSED );
+		}
+		if ( rec.Event.KeyEvent.dwControlKeyState & ( RIGHT_CTRL_PRESSED | LEFT_CTRL_PRESSED ) ) {
+			modifierKeys |= Replxx::KEY::BASE_CONTROL;
+		}
+		if ( rec.Event.KeyEvent.dwControlKeyState & ( RIGHT_ALT_PRESSED | LEFT_ALT_PRESSED ) ) {
+			modifierKeys |= Replxx::KEY::BASE_META;
+		}
+		if ( escSeen ) {
+			modifierKeys |= Replxx::KEY::BASE_META;
+		}
+		int key( rec.Event.KeyEvent.uChar.UnicodeChar );
+		if ( key == 0 ) {
+			switch (rec.Event.KeyEvent.wVirtualKeyCode) {
+				case VK_LEFT:
+					return modifierKeys | Replxx::KEY::LEFT;
+				case VK_RIGHT:
+					return modifierKeys | Replxx::KEY::RIGHT;
+				case VK_UP:
+					return modifierKeys | Replxx::KEY::UP;
+				case VK_DOWN:
+					return modifierKeys | Replxx::KEY::DOWN;
+				case VK_DELETE:
+					return modifierKeys | Replxx::KEY::DELETE;
+				case VK_HOME:
+					return modifierKeys | Replxx::KEY::HOME;
+				case VK_END:
+					return modifierKeys | Replxx::KEY::END;
+				case VK_PRIOR:
+					return modifierKeys | Replxx::KEY::PAGE_UP;
+				case VK_NEXT:
+					return modifierKeys | Replxx::KEY::PAGE_DOWN;
+				case VK_F1:
+					return modifierKeys | Replxx::KEY::F1;
+				case VK_F2:
+					return modifierKeys | Replxx::KEY::F2;
+				case VK_F3:
+					return modifierKeys | Replxx::KEY::F3;
+				case VK_F4:
+					return modifierKeys | Replxx::KEY::F4;
+				case VK_F5:
+					return modifierKeys | Replxx::KEY::F5;
+				case VK_F6:
+					return modifierKeys | Replxx::KEY::F6;
+				case VK_F7:
+					return modifierKeys | Replxx::KEY::F7;
+				case VK_F8:
+					return modifierKeys | Replxx::KEY::F8;
+				case VK_F9:
+					return modifierKeys | Replxx::KEY::F9;
+				case VK_F10:
+					return modifierKeys | Replxx::KEY::F10;
+				case VK_F11:
+					return modifierKeys | Replxx::KEY::F11;
+				case VK_F12:
+					return modifierKeys | Replxx::KEY::F12;
+				default:
+					continue; // in raw mode, ReadConsoleInput shows shift, ctrl - ignore them
+			}
+		} else if ( key == Replxx::KEY::ESCAPE ) { // ESC, set flag for later
+			escSeen = true;
+			continue;
+		} else if ( ( key >= 0xD800 ) && ( key <= 0xDBFF ) ) {
+			highSurrogate = key - 0xD800;
+			continue;
+		} else {
+			// we got a real character, return it
+			if ( ( key >= 0xDC00 ) && ( key <= 0xDFFF ) ) {
+				key -= 0xDC00;
+				key |= ( highSurrogate << 10 );
+				key += 0x10000;
+			}
+			if ( is_control_code( key ) ) {
+				key = control_to_human( key );
+				modifierKeys |= Replxx::KEY::BASE_CONTROL;
+			}
+			key |= modifierKeys;
+			highSurrogate = 0;
+			c = key;
+			break;
+		}
+	}
+
+#else
+	c = read_unicode_character();
+	if (c == 0) {
+		return 0;
+	}
+
+// If _DEBUG_LINUX_KEYBOARD is set, then ctrl-^ puts us into a keyboard
+// debugging mode
+// where we print out decimal and decoded values for whatever the "terminal"
+// program
+// gives us on different keystrokes.	Hit ctrl-C to exit this mode.
+//
+#ifdef __REPLXX_DEBUG__
+	if (c == ctrlChar('^')) {	// ctrl-^, special debug mode, prints all keys hit,
+														 // ctrl-C to get out
+		printf(
+				"\nEntering keyboard debugging mode (on ctrl-^), press ctrl-C to exit "
+				"this mode\n");
+		while (true) {
+			unsigned char keys[10];
+			int ret = read(0, keys, 10);
+
+			if (ret <= 0) {
+				printf("\nret: %d\n", ret);
+			}
+			for (int i = 0; i < ret; ++i) {
+				char32_t key = static_cast<char32_t>(keys[i]);
+				char* friendlyTextPtr;
+				char friendlyTextBuf[10];
+				const char* prefixText = (key < 0x80) ? "" : "0x80+";
+				char32_t keyCopy = (key < 0x80) ? key : key - 0x80;
+				if (keyCopy >= '!' && keyCopy <= '~') {	// printable
+					friendlyTextBuf[0] = '\'';
+					friendlyTextBuf[1] = keyCopy;
+					friendlyTextBuf[2] = '\'';
+					friendlyTextBuf[3] = 0;
+					friendlyTextPtr = friendlyTextBuf;
+				} else if (keyCopy == ' ') {
+					friendlyTextPtr = const_cast<char*>("space");
+				} else if (keyCopy == 27) {
+					friendlyTextPtr = const_cast<char*>("ESC");
+				} else if (keyCopy == 0) {
+					friendlyTextPtr = const_cast<char*>("NUL");
+				} else if (keyCopy == 127) {
+					friendlyTextPtr = const_cast<char*>("DEL");
+				} else {
+					friendlyTextBuf[0] = '^';
+					friendlyTextBuf[1] = control_to_human( keyCopy );
+					friendlyTextBuf[2] = 0;
+					friendlyTextPtr = friendlyTextBuf;
+				}
+				printf("%d x%02X (%s%s)	", key, key, prefixText, friendlyTextPtr);
+			}
+			printf("\x1b[1G\n");	// go to first column of new line
+
+			// drop out of this loop on ctrl-C
+			if (keys[0] == ctrlChar('C')) {
+				printf("Leaving keyboard debugging mode (on ctrl-C)\n");
+				fflush(stdout);
+				return -2;
+			}
+		}
+	}
+#endif // __REPLXX_DEBUG__
+
+	c = EscapeSequenceProcessing::doDispatch(c);
+	if ( is_control_code( c ) ) {
+		c = Replxx::KEY::control( control_to_human( c ) );
+	}
+#endif // #_WIN32
+	return ( c );
+}
+
+Terminal::EVENT_TYPE Terminal::wait_for_input( int long timeout_ ) {
+#ifdef _WIN32
+	std::array<HANDLE,2> handles = { _consoleIn, _interrupt };
+	while ( true ) {
+		DWORD event( WaitForMultipleObjects( static_cast<DWORD>( handles.size() ), handles.data(), false, timeout_ > 0 ? timeout_ : INFINITE ) );
+		switch ( event ) {
+			case ( WAIT_OBJECT_0 + 0 ): {
+				// peek events that will be skipped
+				INPUT_RECORD rec;
+				DWORD count;
+				PeekConsoleInputW( _consoleIn, &rec, 1, &count );
+
+				if (
+					( rec.EventType != KEY_EVENT )
+					|| ( !rec.Event.KeyEvent.bKeyDown && ( rec.Event.KeyEvent.wVirtualKeyCode != VK_MENU ) )
+				) {
+					// read the event to unsignal the handle
+					ReadConsoleInputW( _consoleIn, &rec, 1, &count );
+					continue;
+				} else if (rec.EventType == KEY_EVENT) {
+					int key(rec.Event.KeyEvent.uChar.UnicodeChar);
+					if (key == 0) {
+						switch (rec.Event.KeyEvent.wVirtualKeyCode) {
+						case VK_LEFT:
+						case VK_RIGHT:
+						case VK_UP:
+						case VK_DOWN:
+						case VK_DELETE:
+						case VK_HOME:
+						case VK_END:
+						case VK_PRIOR:
+						case VK_NEXT:
+							break;
+						default:
+							ReadConsoleInputW(_consoleIn, &rec, 1, &count);
+							continue; // in raw mode, ReadConsoleInput shows shift, ctrl - ignore them
+						}
+					}
+				}
+
+				return ( EVENT_TYPE::KEY_PRESS );
+			}
+			case ( WAIT_OBJECT_0 + 1 ): {
+				ResetEvent( _interrupt );
+				if ( _events.empty() ) {
+					continue;
+				}
+				EVENT_TYPE eventType( _events.front() );
+				_events.pop_front();
+				return ( eventType );
+			}
+			case ( WAIT_TIMEOUT ): {
+				return ( EVENT_TYPE::TIMEOUT );
+			}
+		}
+	}
+#else
+	fd_set fdSet;
+	int nfds( max( _interrupt[0], _interrupt[1] ) + 1 );
+	while ( true ) {
+		FD_ZERO( &fdSet );
+		FD_SET( 0, &fdSet );
+		FD_SET( _interrupt[0], &fdSet );
+		timeval tv{ timeout_ / 1000, static_cast<suseconds_t>( ( timeout_ % 1000 ) * 1000 ) };
+		int err( select( nfds, &fdSet, nullptr, nullptr, timeout_ > 0 ? &tv : nullptr ) );
+		if ( ( err == -1 ) && ( errno == EINTR ) ) {
+			continue;
+		}
+		if ( err == 0 ) {
+			return ( EVENT_TYPE::TIMEOUT );
+		}
+		if ( FD_ISSET( _interrupt[0], &fdSet ) ) {
+			char data( 0 );
+			static_cast<void>( read( _interrupt[0], &data, 1 ) == 1 );
+			if ( data == 'k' ) {
+				return ( EVENT_TYPE::KEY_PRESS );
+			}
+			if ( data == 'm' ) {
+				return ( EVENT_TYPE::MESSAGE );
+			}
+			if ( data == 'r' ) {
+				return ( EVENT_TYPE::RESIZE );
+			}
+		}
+		if ( FD_ISSET( 0, &fdSet ) ) {
+			return ( EVENT_TYPE::KEY_PRESS );
+		}
+	}
+#endif
+}
+
+void Terminal::notify_event( EVENT_TYPE eventType_ ) {
+#ifdef _WIN32
+	_events.push_back( eventType_ );
+	SetEvent( _interrupt );
+#else
+	char data( ( eventType_ == EVENT_TYPE::KEY_PRESS ) ? 'k' : ( eventType_ == EVENT_TYPE::MESSAGE ? 'm' : 'r' ) );
+	static_cast<void>( write( _interrupt[1], &data, 1 ) == 1 );
+#endif
+}
+
+/**
+ * Clear the screen ONLY (no redisplay of anything)
+ */
+void Terminal::clear_screen( CLEAR_SCREEN clearScreen_ ) {
+#ifdef _WIN32
+	if ( _autoEscape ) {
+#endif
+		if ( clearScreen_ == CLEAR_SCREEN::WHOLE ) {
+			char const clearCode[] = "\033c\033[H\033[2J\033[0m";
+			static_cast<void>( write(1, clearCode, sizeof ( clearCode ) - 1) >= 0 );
+		} else {
+			char const clearCode[] = "\033[J";
+			static_cast<void>( write(1, clearCode, sizeof ( clearCode ) - 1) >= 0 );
+		}
+		return;
+#ifdef _WIN32
+	}
+	COORD coord = { 0, 0 };
+	CONSOLE_SCREEN_BUFFER_INFO inf;
+	HANDLE consoleOut( _consoleOut != INVALID_HANDLE_VALUE ? _consoleOut : GetStdHandle( STD_OUTPUT_HANDLE ) );
+	GetConsoleScreenBufferInfo( consoleOut, &inf );
+	if ( clearScreen_ == CLEAR_SCREEN::TO_END ) {
+		coord = inf.dwCursorPosition;
+		DWORD nWritten( 0 );
+		SHORT height( inf.srWindow.Bottom - inf.srWindow.Top );
+		DWORD yPos( inf.dwCursorPosition.Y - inf.srWindow.Top );
+		DWORD toWrite( ( height + 1 - yPos ) * inf.dwSize.X - inf.dwCursorPosition.X );
+//		FillConsoleOutputCharacterA( consoleOut, ' ', toWrite, coord, &nWritten );
+		_empty.resize( toWrite - 1, ' ' );
+		WriteConsoleA( consoleOut, _empty.data(), toWrite - 1, &nWritten, nullptr );
+	} else {
+		COORD scrollTarget = { 0, -inf.dwSize.Y };
+		CHAR_INFO fill{ TEXT( ' ' ), inf.wAttributes };
+		SMALL_RECT scrollRect = { 0, 0, inf.dwSize.X, inf.dwSize.Y };
+		ScrollConsoleScreenBuffer( consoleOut, &scrollRect, nullptr, scrollTarget, &fill );
+	}
+	SetConsoleCursorPosition( consoleOut, coord );
+#endif
+}
+
+void Terminal::jump_cursor( int xPos_, int yOffset_ ) {
+#ifdef _WIN32
+	CONSOLE_SCREEN_BUFFER_INFO inf;
+	GetConsoleScreenBufferInfo( _consoleOut, &inf );
+	inf.dwCursorPosition.X = xPos_;
+	inf.dwCursorPosition.Y += yOffset_;
+	SetConsoleCursorPosition( _consoleOut, inf.dwCursorPosition );
+#else
+	char seq[64];
+	if ( yOffset_ != 0 ) { // move the cursor up as required
+		snprintf( seq, sizeof seq, "\033[%d%c", abs( yOffset_ ), yOffset_ > 0 ? 'B' : 'A' );
+		write8( seq, strlen( seq ) );
+	}
+	// position at the end of the prompt, clear to end of screen
+	snprintf(
+		seq, sizeof seq, "\033[%dG",
+		xPos_ + 1 /* 1-based on VT100 */
+	);
+	write8( seq, strlen( seq ) );
+#endif
+}
+
+#ifdef _WIN32
+void Terminal::set_cursor_visible( bool visible_ ) {
+	CONSOLE_CURSOR_INFO     cursorInfo;
+	GetConsoleCursorInfo( _consoleOut, &cursorInfo );
+	cursorInfo.bVisible = visible_;
+	SetConsoleCursorInfo( _consoleOut, &cursorInfo );
+	return;
+}
+#else
+void Terminal::set_cursor_visible( bool ) {}
+#endif
+
+#ifndef _WIN32
+int Terminal::read_verbatim( char32_t* buffer_, int size_ ) {
+	int len( 0 );
+	buffer_[len ++] = read_unicode_character();
+	int statusFlags( ::fcntl( STDIN_FILENO, F_GETFL, 0 ) );
+	::fcntl( STDIN_FILENO, F_SETFL, statusFlags | O_NONBLOCK );
+	while ( len < size_ ) {
+		char32_t c( read_unicode_character() );
+		if ( c == 0 ) {
+			break;
+		}
+		buffer_[len ++] = c;
+	}
+	::fcntl( STDIN_FILENO, F_SETFL, statusFlags );
+	return ( len );
+}
+
+int Terminal::install_window_change_handler( void ) {
+	struct sigaction sa;
+	sigemptyset(&sa.sa_mask);
+	sa.sa_flags = 0;
+	sa.sa_handler = &WindowSizeChanged;
+
+	if (sigaction(SIGWINCH, &sa, nullptr) == -1) {
+		return errno;
+	}
+	return 0;
+}
+#endif
+
+}
+

third-party/replxx/src/terminal.hxx

@@ -0,0 +1,94 @@
+#ifndef REPLXX_IO_HXX_INCLUDED
+#define REPLXX_IO_HXX_INCLUDED 1
+
+#include <deque>
+
+#ifdef _WIN32
+#include <vector>
+#include <windows.h>
+#else
+#include <termios.h>
+#endif
+
+#include "utf8string.hxx"
+
+namespace replxx {
+
+class Terminal {
+public:
+	enum class EVENT_TYPE {
+		KEY_PRESS,
+		MESSAGE,
+		TIMEOUT,
+		RESIZE
+	};
+private:
+#ifdef _WIN32
+	HANDLE _consoleOut;
+	HANDLE _consoleIn;
+	DWORD _origOutMode;
+	DWORD _origInMode;
+	bool _autoEscape;
+	WORD _oldDisplayAttribute;
+	UINT const _inputCodePage;
+	UINT const _outputCodePage;
+	HANDLE _interrupt;
+	typedef std::deque<EVENT_TYPE> events_t;
+	events_t _events;
+	std::vector<char> _empty;
+#else
+	struct termios _origTermios; /* in order to restore at exit */
+	int _interrupt[2];
+#endif
+	bool _rawMode; /* for destructor to check if restore is needed */
+	Utf8String _utf8;
+public:
+	enum class CLEAR_SCREEN {
+		WHOLE,
+		TO_END
+	};
+public:
+	Terminal( void );
+	~Terminal( void );
+	void write32( char32_t const*, int );
+	void write8( char const*, int );
+	int get_screen_columns(void);
+	int get_screen_rows(void);
+	void enable_bracketed_paste( void );
+	void disable_bracketed_paste( void );
+	int enable_raw_mode(void);
+	void disable_raw_mode(void);
+	char32_t read_char(void);
+	void clear_screen( CLEAR_SCREEN );
+	EVENT_TYPE wait_for_input( int long = 0 );
+	void notify_event( EVENT_TYPE );
+	void jump_cursor( int, int );
+	void set_cursor_visible( bool );
+#ifndef _WIN32
+	int read_verbatim( char32_t*, int );
+	int install_window_change_handler( void );
+#endif
+private:
+	void enable_out( void );
+	void disable_out( void );
+private:
+	Terminal( Terminal const& ) = delete;
+	Terminal& operator = ( Terminal const& ) = delete;
+	Terminal( Terminal&& ) = delete;
+	Terminal& operator = ( Terminal&& ) = delete;
+};
+
+void beep();
+char32_t read_unicode_character(void);
+
+namespace tty {
+
+extern bool in;
+extern bool out;
+
+}
+
+}
+
+#endif
+

third-party/replxx/src/unicodestring.hxx

@@ -0,0 +1,191 @@
+#ifndef REPLXX_UNICODESTRING_HXX_INCLUDED
+#define REPLXX_UNICODESTRING_HXX_INCLUDED
+
+#include <vector>
+#include <cstring>
+
+#include "conversion.hxx"
+
+namespace replxx {
+
+class UnicodeString {
+public:
+	typedef std::vector<char32_t> data_buffer_t;
+	typedef data_buffer_t::const_iterator const_iterator;
+	typedef data_buffer_t::iterator iterator;
+private:
+	data_buffer_t _data;
+public:
+	UnicodeString()
+		: _data() {
+	}
+
+	explicit UnicodeString( std::string const& src )
+		: _data() {
+		assign( src );
+	}
+
+	explicit UnicodeString( char const* src )
+		: _data() {
+		assign( src );
+	}
+
+	explicit UnicodeString( char8_t const* src )
+		: UnicodeString( reinterpret_cast<const char*>( src ) ) {
+	}
+
+	explicit UnicodeString( char32_t const* src )
+		: _data() {
+		int len( 0 );
+		while ( src[len] != 0 ) {
+			++ len;
+		}
+		_data.assign( src, src + len );
+	}
+
+	explicit UnicodeString( char32_t const* src, int len )
+		: _data() {
+		_data.assign( src, src + len );
+	}
+
+	explicit UnicodeString( int len )
+		: _data() {
+		_data.resize( len );
+	}
+
+	UnicodeString& assign( std::string const& str_ ) {
+		_data.resize( static_cast<int>( str_.length() ) );
+		int len( 0 );
+		copyString8to32( _data.data(), static_cast<int>( str_.length() ), len, str_.c_str() );
+		_data.resize( len );
+		return *this;
+	}
+
+	UnicodeString& assign( char const* str_ ) {
+		int byteCount( static_cast<int>( strlen( str_ ) ) );
+		_data.resize( byteCount );
+		int len( 0 );
+		copyString8to32( _data.data(), byteCount, len, str_ );
+		_data.resize( len );
+		return *this;
+	}
+
+	UnicodeString& assign( UnicodeString const& other_ ) {
+		_data = other_._data;
+		return *this;
+	}
+
+	explicit UnicodeString( UnicodeString const& ) = default;
+	UnicodeString& operator = ( UnicodeString const& ) = default;
+	UnicodeString( UnicodeString&& ) = default;
+	UnicodeString& operator = ( UnicodeString&& ) = default;
+	bool operator == ( UnicodeString const& other_ ) const {
+		return ( _data == other_._data );
+	}
+
+	bool operator != ( UnicodeString const& other_ ) const {
+		return ( _data != other_._data );
+	}
+
+	UnicodeString& append( UnicodeString const& other ) {
+		_data.insert( _data.end(), other._data.begin(), other._data.end() );
+		return *this;
+	}
+
+	void push_back( char32_t c_ ) {
+		_data.push_back( c_ );
+	}
+
+	UnicodeString& append( char32_t const* src, int len ) {
+		_data.insert( _data.end(), src, src + len );
+		return *this;
+	}
+
+	UnicodeString& insert( int pos_, UnicodeString const& str_, int offset_, int len_ ) {
+		_data.insert( _data.begin() + pos_, str_._data.begin() + offset_, str_._data.begin() + offset_ + len_ );
+		return *this;
+	}
+
+	UnicodeString& insert( int pos_, char32_t c_ ) {
+		_data.insert( _data.begin() + pos_, c_ );
+		return *this;
+	}
+
+	UnicodeString& erase( int pos_ ) {
+		_data.erase( _data.begin() + pos_ );
+		return *this;
+	}
+
+	UnicodeString& erase( int pos_, int len_ ) {
+		_data.erase( _data.begin() + pos_, _data.begin() + pos_ + len_ );
+		return *this;
+	}
+
+	char32_t const* get() const {
+		return _data.data();
+	}
+
+	char32_t* get() {
+		return _data.data();
+	}
+
+	int length() const {
+		return static_cast<int>( _data.size() );
+	}
+
+	void clear( void ) {
+		_data.clear();
+	}
+
+	const char32_t& operator[]( size_t pos ) const {
+		return _data[pos];
+	}
+
+	char32_t& operator[]( size_t pos ) {
+		return _data[pos];
+	}
+
+	bool starts_with( data_buffer_t::const_iterator first_, data_buffer_t::const_iterator last_ ) const {
+		return (
+			( std::distance( first_, last_ ) <= length() )
+			&& ( std::equal( first_, last_, _data.begin() ) )
+		);
+	}
+
+	bool ends_with( data_buffer_t::const_iterator first_, data_buffer_t::const_iterator last_ ) const {
+		int len( static_cast<int>( std::distance( first_, last_ ) ) );
+		return (
+			( len <= length() )
+			&& ( std::equal( first_, last_, _data.end() - len ) )
+		);
+	}
+
+	bool is_empty( void ) const {
+		return ( _data.size() == 0 );
+	}
+
+	void swap( UnicodeString& other_ ) {
+		_data.swap( other_._data );
+	}
+
+	const_iterator begin( void ) const {
+		return ( _data.begin() );
+	}
+
+	const_iterator end( void ) const {
+		return ( _data.end() );
+	}
+
+	iterator begin( void ) {
+		return ( _data.begin() );
+	}
+
+	iterator end( void ) {
+		return ( _data.end() );
+	}
+};
+
+}
+
+#endif
+

third-party/replxx/src/utf8string.hxx

@@ -0,0 +1,94 @@
+#ifndef REPLXX_UTF8STRING_HXX_INCLUDED
+#define REPLXX_UTF8STRING_HXX_INCLUDED
+
+#include <memory>
+
+#include "unicodestring.hxx"
+
+namespace replxx {
+
+class Utf8String {
+private:
+	typedef std::unique_ptr<char[]> buffer_t;
+	buffer_t _data;
+	int _bufSize;
+	int _len;
+public:
+	Utf8String( void )
+		: _data()
+		, _bufSize( 0 )
+		, _len( 0 ) {
+	}
+	explicit Utf8String( UnicodeString const& src )
+		: _data()
+		, _bufSize( 0 )
+		, _len( 0 ) {
+		assign( src, src.length() );
+	}
+
+	Utf8String( UnicodeString const& src_, int len_ )
+		: _data()
+		, _bufSize( 0 )
+		, _len( 0 ) {
+		assign( src_, len_ );
+	}
+
+	void assign( UnicodeString const& str_ ) {
+		assign( str_, str_.length() );
+	}
+
+	void assign( UnicodeString const& str_, int len_ ) {
+		assign( str_.get(), len_ );
+	}
+
+	void assign( char32_t const* str_, int len_ ) {
+		int len( len_ * 4 );
+		realloc( len );
+		_len = copyString32to8( _data.get(), len, str_, len_ );
+	}
+
+	void assign( std::string const& str_ ) {
+		realloc( static_cast<int>( str_.length() ) );
+		strncpy( _data.get(), str_.c_str(), str_.length() );
+		_len = static_cast<int>( str_.length() );
+	}
+
+	void assign( Utf8String const& other_ ) {
+		realloc( other_._len );
+		strncpy( _data.get(), other_._data.get(), other_._len );
+		_len = other_._len;
+	}
+
+	char const* get() const {
+		return _data.get();
+	}
+
+	int size( void ) const {
+		return ( _len );
+	}
+
+	bool operator != ( Utf8String const& other_ ) {
+		return ( ( other_._len != _len ) || ( memcmp( other_._data.get(), _data.get(), _len ) != 0 ) );
+	}
+
+private:
+	void realloc( int reqLen ) {
+		if ( ( reqLen + 1 ) > _bufSize ) {
+			_bufSize = 1;
+			while ( ( reqLen + 1 ) > _bufSize ) {
+				_bufSize *= 2;
+			}
+			_data.reset( new char[_bufSize] );
+			memset( _data.get(), 0, _bufSize );
+		}
+		_data[reqLen] = 0;
+		return;
+	}
+	Utf8String(const Utf8String&) = delete;
+	Utf8String& operator=(const Utf8String&) = delete;
+};
+
+}
+
+#endif
+

third-party/replxx/src/util.cxx

@@ -0,0 +1,170 @@
+#include <chrono>
+#include <cstdlib>
+#include <cstring>
+#include <ctime>
+#include <wctype.h>
+
+#include "util.hxx"
+
+namespace replxx {
+
+int mk_wcwidth( char32_t );
+
+/**
+ * Recompute widths of all characters in a char32_t buffer
+ * @param text      - input buffer of Unicode characters
+ * @param widths    - output buffer of character widths
+ * @param charCount - number of characters in buffer
+ */
+void recompute_character_widths( char32_t const* text, char* widths, int charCount ) {
+	for (int i = 0; i < charCount; ++i) {
+		widths[i] = mk_wcwidth(text[i]);
+	}
+}
+
+/**
+ * Calculate a new screen position given a starting position, screen width and
+ * character count
+ * @param x             - initial x position (zero-based)
+ * @param y             - initial y position (zero-based)
+ * @param screenColumns - screen column count
+ * @param charCount     - character positions to advance
+ * @param xOut          - returned x position (zero-based)
+ * @param yOut          - returned y position (zero-based)
+ */
+void calculate_screen_position(
+	int x, int y, int screenColumns,
+	int charCount, int& xOut, int& yOut
+) {
+	xOut = x;
+	yOut = y;
+	int charsRemaining = charCount;
+	while ( charsRemaining > 0 ) {
+		int charsThisRow = ( ( x + charsRemaining ) < screenColumns )
+			? charsRemaining
+			: screenColumns - x;
+		xOut = x + charsThisRow;
+		yOut = y;
+		charsRemaining -= charsThisRow;
+		x = 0;
+		++ y;
+	}
+	if ( xOut == screenColumns ) {	// we have to special-case line wrap
+		xOut = 0;
+		++ yOut;
+	}
+}
+
+/**
+ * Calculate a column width using mk_wcswidth()
+ * @param buf32 - text to calculate
+ * @param len   - length of text to calculate
+ */
+int calculate_displayed_length( char32_t const* buf32_, int size_ ) {
+	int len( 0 );
+	for ( int i( 0 ); i < size_; ++ i ) {
+		char32_t c( buf32_[i] );
+		if ( c == '\033' ) {
+			int escStart( i );
+			++ i;
+			if ( ( i < size_ ) && ( buf32_[i] != '[' ) ) {
+				i = escStart;
+				++ len;
+				continue;
+			}
+			++ i;
+			for ( ; i < size_; ++ i ) {
+				c = buf32_[i];
+				if ( ( c != ';' ) && ( ( c < '0' ) || ( c > '9' ) ) ) {
+					break;
+				}
+			}
+			if ( ( i < size_ ) && ( buf32_[i] == 'm' ) ) {
+				continue;
+			}
+			i = escStart;
+			len += 2;
+		} else if ( is_control_code( c ) ) {
+			len += 2;
+		} else {
+			int wcw( mk_wcwidth( c ) );
+			if ( wcw < 0 ) {
+				len = -1;
+				break;
+			}
+			len += wcw;
+		}
+	}
+	return ( len );
+}
+
+char const* ansi_color( Replxx::Color color_ ) {
+	static char const reset[] = "\033[0m";
+	static char const black[] = "\033[0;22;30m";
+	static char const red[] = "\033[0;22;31m";
+	static char const green[] = "\033[0;22;32m";
+	static char const brown[] = "\033[0;22;33m";
+	static char const blue[] = "\033[0;22;34m";
+	static char const magenta[] = "\033[0;22;35m";
+	static char const cyan[] = "\033[0;22;36m";
+	static char const lightgray[] = "\033[0;22;37m";
+
+#ifdef _WIN32
+	static bool const has256colorDefault( true );
+#else
+	static bool const has256colorDefault( false );
+#endif
+	static char const* TERM( getenv( "TERM" ) );
+	static bool const has256color( TERM ? ( strstr( TERM, "256" ) != nullptr ) : has256colorDefault );
+	static char const* gray = has256color ? "\033[0;1;90m" : "\033[0;1;30m";
+	static char const* brightred = has256color ? "\033[0;1;91m" : "\033[0;1;31m";
+	static char const* brightgreen = has256color ? "\033[0;1;92m" : "\033[0;1;32m";
+	static char const* yellow = has256color ? "\033[0;1;93m" : "\033[0;1;33m";
+	static char const* brightblue = has256color ? "\033[0;1;94m" : "\033[0;1;34m";
+	static char const* brightmagenta = has256color ? "\033[0;1;95m" : "\033[0;1;35m";
+	static char const* brightcyan = has256color ? "\033[0;1;96m" : "\033[0;1;36m";
+	static char const* white = has256color ? "\033[0;1;97m" : "\033[0;1;37m";
+	static char const error[] = "\033[101;1;33m";
+
+	char const* code( reset );
+	switch ( color_ ) {
+		case Replxx::Color::BLACK:         code = black;         break;
+		case Replxx::Color::RED:           code = red;           break;
+		case Replxx::Color::GREEN:         code = green;         break;
+		case Replxx::Color::BROWN:         code = brown;         break;
+		case Replxx::Color::BLUE:          code = blue;          break;
+		case Replxx::Color::MAGENTA:       code = magenta;       break;
+		case Replxx::Color::CYAN:          code = cyan;          break;
+		case Replxx::Color::LIGHTGRAY:     code = lightgray;     break;
+		case Replxx::Color::GRAY:          code = gray;          break;
+		case Replxx::Color::BRIGHTRED:     code = brightred;     break;
+		case Replxx::Color::BRIGHTGREEN:   code = brightgreen;   break;
+		case Replxx::Color::YELLOW:        code = yellow;        break;
+		case Replxx::Color::BRIGHTBLUE:    code = brightblue;    break;
+		case Replxx::Color::BRIGHTMAGENTA: code = brightmagenta; break;
+		case Replxx::Color::BRIGHTCYAN:    code = brightcyan;    break;
+		case Replxx::Color::WHITE:         code = white;         break;
+		case Replxx::Color::ERROR:         code = error;         break;
+		case Replxx::Color::DEFAULT:       code = reset;         break;
+	}
+	return ( code );
+}
+
+std::string now_ms_str( void ) {
+	std::chrono::milliseconds ms( std::chrono::duration_cast<std::chrono::milliseconds>( std::chrono::system_clock::now().time_since_epoch() ) );
+	time_t t( ms.count() / 1000 );
+	tm broken;
+#ifdef _WIN32
+#define localtime_r( t, b ) localtime_s( ( b ), ( t ) )
+#endif
+	localtime_r( &t, &broken );
+#undef localtime_r
+	static int const BUFF_SIZE( 32 );
+	char str[BUFF_SIZE];
+	strftime( str, BUFF_SIZE, "%Y-%m-%d %H:%M:%S.", &broken );
+	snprintf( str + sizeof ( "YYYY-mm-dd HH:MM:SS" ), 5, "%03d", static_cast<int>( ms.count() % 1000 ) );
+	return ( str );
+}
+
+}
+

third-party/replxx/src/util.hxx

@@ -0,0 +1,26 @@
+#ifndef REPLXX_UTIL_HXX_INCLUDED
+#define REPLXX_UTIL_HXX_INCLUDED 1
+
+#include "replxx.hxx"
+
+namespace replxx {
+
+inline bool is_control_code(char32_t testChar) {
+	return (testChar < ' ') ||											// C0 controls
+				 (testChar >= 0x7F && testChar <= 0x9F);	// DEL and C1 controls
+}
+
+inline char32_t control_to_human( char32_t key ) {
+	return ( key < 27 ? ( key + 0x40 ) : ( key + 0x18 ) );
+}
+
+void recompute_character_widths( char32_t const* text, char* widths, int charCount );
+void calculate_screen_position( int x, int y, int screenColumns, int charCount, int& xOut, int& yOut );
+int calculate_displayed_length( char32_t const* buf32, int size );
+char const* ansi_color( Replxx::Color );
+std::string now_ms_str( void );
+
+}
+
+#endif
+

third-party/replxx/src/wcwidth.cpp

@@ -0,0 +1,296 @@
+/*
+ * This is an implementation of wcwidth() and wcswidth() (defined in
+ * IEEE Std 1002.1-2001) for Unicode.
+ *
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcwidth.html
+ * http://www.opengroup.org/onlinepubs/007904975/functions/wcswidth.html
+ *
+ * In fixed-width output devices, Latin characters all occupy a single
+ * "cell" position of equal width, whereas ideographic CJK characters
+ * occupy two such cells. Interoperability between terminal-line
+ * applications and (teletype-style) character terminals using the
+ * UTF-8 encoding requires agreement on which character should advance
+ * the cursor by how many cell positions. No established formal
+ * standards exist at present on which Unicode character shall occupy
+ * how many cell positions on character terminals. These routines are
+ * a first attempt of defining such behavior based on simple rules
+ * applied to data provided by the Unicode Consortium.
+ *
+ * For some graphical characters, the Unicode standard explicitly
+ * defines a character-cell width via the definition of the East Asian
+ * FullWidth (F), Wide (W), Half-width (H), and Narrow (Na) classes.
+ * In all these cases, there is no ambiguity about which width a
+ * terminal shall use. For characters in the East Asian Ambiguous (A)
+ * class, the width choice depends purely on a preference of backward
+ * compatibility with either historic CJK or Western practice.
+ * Choosing single-width for these characters is easy to justify as
+ * the appropriate long-term solution, as the CJK practice of
+ * displaying these characters as double-width comes from historic
+ * implementation simplicity (8-bit encoded characters were displayed
+ * single-width and 16-bit ones double-width, even for Greek,
+ * Cyrillic, etc.) and not any typographic considerations.
+ *
+ * Much less clear is the choice of width for the Not East Asian
+ * (Neutral) class. Existing practice does not dictate a width for any
+ * of these characters. It would nevertheless make sense
+ * typographically to allocate two character cells to characters such
+ * as for instance EM SPACE or VOLUME INTEGRAL, which cannot be
+ * represented adequately with a single-width glyph. The following
+ * routines at present merely assign a single-cell width to all
+ * neutral characters, in the interest of simplicity. This is not
+ * entirely satisfactory and should be reconsidered before
+ * establishing a formal standard in this area. At the moment, the
+ * decision which Not East Asian (Neutral) characters should be
+ * represented by double-width glyphs cannot yet be answered by
+ * applying a simple rule from the Unicode database content. Setting
+ * up a proper standard for the behavior of UTF-8 character terminals
+ * will require a careful analysis not only of each Unicode character,
+ * but also of each presentation form, something the author of these
+ * routines has avoided to do so far.
+ *
+ * http://www.unicode.org/unicode/reports/tr11/
+ *
+ * Markus Kuhn -- 2007-05-26 (Unicode 5.0)
+ *
+ * Permission to use, copy, modify, and distribute this software
+ * for any purpose and without fee is hereby granted. The author
+ * disclaims all warranties with regard to this software.
+ *
+ * Latest version: http://www.cl.cam.ac.uk/~mgk25/ucs/wcwidth.c
+ */
+
+#include <wchar.h>
+#include <string>
+#include <memory>
+
+namespace replxx {
+
+struct interval {
+	char32_t first;
+	char32_t last;
+};
+
+/* auxiliary function for binary search in interval table */
+static int bisearch(char32_t ucs, const struct interval *table, int max) {
+	int min = 0;
+	int mid;
+
+	if (ucs < table[0].first || ucs > table[max].last)
+		return 0;
+	while (max >= min) {
+		mid = (min + max) / 2;
+		if (ucs > table[mid].last)
+			min = mid + 1;
+		else if (ucs < table[mid].first)
+			max = mid - 1;
+		else
+			return 1;
+	}
+
+	return 0;
+}
+
+
+/* The following two functions define the column width of an ISO 10646
+ * character as follows:
+ *
+ *		- The null character (U+0000) has a column width of 0.
+ *
+ *		- Other C0/C1 control characters and DEL will lead to a return
+ *			value of -1.
+ *
+ *		- Non-spacing and enclosing combining characters (general
+ *			category code Mn or Me in the Unicode database) have a
+ *			column width of 0.
+ *
+ *		- SOFT HYPHEN (U+00AD) has a column width of 1.
+ *
+ *		- Other format characters (general category code Cf in the Unicode
+ *			database) and ZERO WIDTH SPACE (U+200B) have a column width of 0.
+ *
+ *		- Hangul Jamo medial vowels and final consonants (U+1160-U+11FF)
+ *			have a column width of 0.
+ *
+ *		- Spacing characters in the East Asian Wide (W) or East Asian
+ *			Full-width (F) category as defined in Unicode Technical
+ *			Report #11 have a column width of 2.
+ *
+ *		- All remaining characters (including all printable
+ *			ISO 8859-1 and WGL4 characters, Unicode control characters,
+ *			etc.) have a column width of 1.
+ *
+ * This implementation assumes that wchar_t characters are encoded
+ * in ISO 10646.
+ */
+
+int mk_is_wide_char(char32_t ucs) {
+  static const struct interval wide[] = {
+    {0x1100, 0x115f}, {0x231a, 0x231b}, {0x2329, 0x232a},
+    {0x23e9, 0x23ec}, {0x23f0, 0x23f0}, {0x23f3, 0x23f3},
+    {0x25fd, 0x25fe}, {0x2614, 0x2615}, {0x2648, 0x2653},
+    {0x267f, 0x267f}, {0x2693, 0x2693}, {0x26a1, 0x26a1},
+    {0x26aa, 0x26ab}, {0x26bd, 0x26be}, {0x26c4, 0x26c5},
+    {0x26ce, 0x26ce}, {0x26d4, 0x26d4}, {0x26ea, 0x26ea},
+    {0x26f2, 0x26f3}, {0x26f5, 0x26f5}, {0x26fa, 0x26fa},
+    {0x26fd, 0x26fd}, {0x2705, 0x2705}, {0x270a, 0x270b},
+    {0x2728, 0x2728}, {0x274c, 0x274c}, {0x274e, 0x274e},
+    {0x2753, 0x2755}, {0x2757, 0x2757}, {0x2795, 0x2797},
+    {0x27b0, 0x27b0}, {0x27bf, 0x27bf}, {0x2b1b, 0x2b1c},
+    {0x2b50, 0x2b50}, {0x2b55, 0x2b55}, {0x2e80, 0x2fdf},
+    {0x2ff0, 0x303e}, {0x3040, 0x3247}, {0x3250, 0x4dbf},
+    {0x4e00, 0xa4cf}, {0xa960, 0xa97f}, {0xac00, 0xd7a3},
+    {0xf900, 0xfaff}, {0xfe10, 0xfe19}, {0xfe30, 0xfe6f},
+    {0xff01, 0xff60}, {0xffe0, 0xffe6}, {0x16fe0, 0x16fe1},
+    {0x17000, 0x18aff}, {0x1b000, 0x1b12f}, {0x1b170, 0x1b2ff},
+    {0x1f004, 0x1f004}, {0x1f0cf, 0x1f0cf}, {0x1f18e, 0x1f18e},
+    {0x1f191, 0x1f19a}, {0x1f200, 0x1f202}, {0x1f210, 0x1f23b},
+    {0x1f240, 0x1f248}, {0x1f250, 0x1f251}, {0x1f260, 0x1f265},
+    {0x1f300, 0x1f320}, {0x1f32d, 0x1f335}, {0x1f337, 0x1f37c},
+    {0x1f37e, 0x1f393}, {0x1f3a0, 0x1f3ca}, {0x1f3cf, 0x1f3d3},
+    {0x1f3e0, 0x1f3f0}, {0x1f3f4, 0x1f3f4}, {0x1f3f8, 0x1f43e},
+    {0x1f440, 0x1f440}, {0x1f442, 0x1f4fc}, {0x1f4ff, 0x1f53d},
+    {0x1f54b, 0x1f54e}, {0x1f550, 0x1f567}, {0x1f57a, 0x1f57a},
+    {0x1f595, 0x1f596}, {0x1f5a4, 0x1f5a4}, {0x1f5fb, 0x1f64f},
+    {0x1f680, 0x1f6c5}, {0x1f6cc, 0x1f6cc}, {0x1f6d0, 0x1f6d2},
+    {0x1f6eb, 0x1f6ec}, {0x1f6f4, 0x1f6f8}, {0x1f910, 0x1f93e},
+    {0x1f940, 0x1f94c}, {0x1f950, 0x1f96b}, {0x1f980, 0x1f997},
+    {0x1f9c0, 0x1f9c0}, {0x1f9d0, 0x1f9e6}, {0x20000, 0x2fffd},
+    {0x30000, 0x3fffd},
+  };
+
+  if ( bisearch(ucs, wide, sizeof(wide) / sizeof(struct interval) - 1) ) {
+    return 1;
+	}
+
+  return 0;
+}
+
+int mk_wcwidth(char32_t ucs) {
+	/* sorted list of non-overlapping intervals of non-spacing characters */
+	/* generated by "uniset +cat=Me +cat=Mn +cat=Cf -00AD +1160-11FF +200B c" */
+	static const struct interval combining[] = {
+    {0x00ad, 0x00ad}, {0x0300, 0x036f}, {0x0483, 0x0489},
+    {0x0591, 0x05bd}, {0x05bf, 0x05bf}, {0x05c1, 0x05c2},
+    {0x05c4, 0x05c5}, {0x05c7, 0x05c7}, {0x0610, 0x061a},
+    {0x061c, 0x061c}, {0x064b, 0x065f}, {0x0670, 0x0670},
+    {0x06d6, 0x06dc}, {0x06df, 0x06e4}, {0x06e7, 0x06e8},
+    {0x06ea, 0x06ed}, {0x0711, 0x0711}, {0x0730, 0x074a},
+    {0x07a6, 0x07b0}, {0x07eb, 0x07f3}, {0x0816, 0x0819},
+    {0x081b, 0x0823}, {0x0825, 0x0827}, {0x0829, 0x082d},
+    {0x0859, 0x085b}, {0x08d4, 0x08e1}, {0x08e3, 0x0902},
+    {0x093a, 0x093a}, {0x093c, 0x093c}, {0x0941, 0x0948},
+    {0x094d, 0x094d}, {0x0951, 0x0957}, {0x0962, 0x0963},
+    {0x0981, 0x0981}, {0x09bc, 0x09bc}, {0x09c1, 0x09c4},
+    {0x09cd, 0x09cd}, {0x09e2, 0x09e3}, {0x0a01, 0x0a02},
+    {0x0a3c, 0x0a3c}, {0x0a41, 0x0a42}, {0x0a47, 0x0a48},
+    {0x0a4b, 0x0a4d}, {0x0a51, 0x0a51}, {0x0a70, 0x0a71},
+    {0x0a75, 0x0a75}, {0x0a81, 0x0a82}, {0x0abc, 0x0abc},
+    {0x0ac1, 0x0ac5}, {0x0ac7, 0x0ac8}, {0x0acd, 0x0acd},
+    {0x0ae2, 0x0ae3}, {0x0afa, 0x0aff}, {0x0b01, 0x0b01},
+    {0x0b3c, 0x0b3c}, {0x0b3f, 0x0b3f}, {0x0b41, 0x0b44},
+    {0x0b4d, 0x0b4d}, {0x0b56, 0x0b56}, {0x0b62, 0x0b63},
+    {0x0b82, 0x0b82}, {0x0bc0, 0x0bc0}, {0x0bcd, 0x0bcd},
+    {0x0c00, 0x0c00}, {0x0c3e, 0x0c40}, {0x0c46, 0x0c48},
+    {0x0c4a, 0x0c4d}, {0x0c55, 0x0c56}, {0x0c62, 0x0c63},
+    {0x0c81, 0x0c81}, {0x0cbc, 0x0cbc}, {0x0cbf, 0x0cbf},
+    {0x0cc6, 0x0cc6}, {0x0ccc, 0x0ccd}, {0x0ce2, 0x0ce3},
+    {0x0d00, 0x0d01}, {0x0d3b, 0x0d3c}, {0x0d41, 0x0d44},
+    {0x0d4d, 0x0d4d}, {0x0d62, 0x0d63}, {0x0dca, 0x0dca},
+    {0x0dd2, 0x0dd4}, {0x0dd6, 0x0dd6}, {0x0e31, 0x0e31},
+    {0x0e34, 0x0e3a}, {0x0e47, 0x0e4e}, {0x0eb1, 0x0eb1},
+    {0x0eb4, 0x0eb9}, {0x0ebb, 0x0ebc}, {0x0ec8, 0x0ecd},
+    {0x0f18, 0x0f19}, {0x0f35, 0x0f35}, {0x0f37, 0x0f37},
+    {0x0f39, 0x0f39}, {0x0f71, 0x0f7e}, {0x0f80, 0x0f84},
+    {0x0f86, 0x0f87}, {0x0f8d, 0x0f97}, {0x0f99, 0x0fbc},
+    {0x0fc6, 0x0fc6}, {0x102d, 0x1030}, {0x1032, 0x1037},
+    {0x1039, 0x103a}, {0x103d, 0x103e}, {0x1058, 0x1059},
+    {0x105e, 0x1060}, {0x1071, 0x1074}, {0x1082, 0x1082},
+    {0x1085, 0x1086}, {0x108d, 0x108d}, {0x109d, 0x109d},
+    {0x1160, 0x11ff}, {0x135d, 0x135f}, {0x1712, 0x1714},
+    {0x1732, 0x1734}, {0x1752, 0x1753}, {0x1772, 0x1773},
+    {0x17b4, 0x17b5}, {0x17b7, 0x17bd}, {0x17c6, 0x17c6},
+    {0x17c9, 0x17d3}, {0x17dd, 0x17dd}, {0x180b, 0x180e},
+    {0x1885, 0x1886}, {0x18a9, 0x18a9}, {0x1920, 0x1922},
+    {0x1927, 0x1928}, {0x1932, 0x1932}, {0x1939, 0x193b},
+    {0x1a17, 0x1a18}, {0x1a1b, 0x1a1b}, {0x1a56, 0x1a56},
+    {0x1a58, 0x1a5e}, {0x1a60, 0x1a60}, {0x1a62, 0x1a62},
+    {0x1a65, 0x1a6c}, {0x1a73, 0x1a7c}, {0x1a7f, 0x1a7f},
+    {0x1ab0, 0x1abe}, {0x1b00, 0x1b03}, {0x1b34, 0x1b34},
+    {0x1b36, 0x1b3a}, {0x1b3c, 0x1b3c}, {0x1b42, 0x1b42},
+    {0x1b6b, 0x1b73}, {0x1b80, 0x1b81}, {0x1ba2, 0x1ba5},
+    {0x1ba8, 0x1ba9}, {0x1bab, 0x1bad}, {0x1be6, 0x1be6},
+    {0x1be8, 0x1be9}, {0x1bed, 0x1bed}, {0x1bef, 0x1bf1},
+    {0x1c2c, 0x1c33}, {0x1c36, 0x1c37}, {0x1cd0, 0x1cd2},
+    {0x1cd4, 0x1ce0}, {0x1ce2, 0x1ce8}, {0x1ced, 0x1ced},
+    {0x1cf4, 0x1cf4}, {0x1cf8, 0x1cf9}, {0x1dc0, 0x1df9},
+    {0x1dfb, 0x1dff}, {0x200b, 0x200f}, {0x202a, 0x202e},
+    {0x2060, 0x2064}, {0x2066, 0x206f}, {0x20d0, 0x20f0},
+    {0x2cef, 0x2cf1}, {0x2d7f, 0x2d7f}, {0x2de0, 0x2dff},
+    {0x302a, 0x302d}, {0x3099, 0x309a}, {0xa66f, 0xa672},
+    {0xa674, 0xa67d}, {0xa69e, 0xa69f}, {0xa6f0, 0xa6f1},
+    {0xa802, 0xa802}, {0xa806, 0xa806}, {0xa80b, 0xa80b},
+    {0xa825, 0xa826}, {0xa8c4, 0xa8c5}, {0xa8e0, 0xa8f1},
+    {0xa926, 0xa92d}, {0xa947, 0xa951}, {0xa980, 0xa982},
+    {0xa9b3, 0xa9b3}, {0xa9b6, 0xa9b9}, {0xa9bc, 0xa9bc},
+    {0xa9e5, 0xa9e5}, {0xaa29, 0xaa2e}, {0xaa31, 0xaa32},
+    {0xaa35, 0xaa36}, {0xaa43, 0xaa43}, {0xaa4c, 0xaa4c},
+    {0xaa7c, 0xaa7c}, {0xaab0, 0xaab0}, {0xaab2, 0xaab4},
+    {0xaab7, 0xaab8}, {0xaabe, 0xaabf}, {0xaac1, 0xaac1},
+    {0xaaec, 0xaaed}, {0xaaf6, 0xaaf6}, {0xabe5, 0xabe5},
+    {0xabe8, 0xabe8}, {0xabed, 0xabed}, {0xfb1e, 0xfb1e},
+    {0xfe00, 0xfe0f}, {0xfe20, 0xfe2f}, {0xfeff, 0xfeff},
+    {0xfff9, 0xfffb}, {0x101fd, 0x101fd}, {0x102e0, 0x102e0},
+    {0x10376, 0x1037a}, {0x10a01, 0x10a03}, {0x10a05, 0x10a06},
+    {0x10a0c, 0x10a0f}, {0x10a38, 0x10a3a}, {0x10a3f, 0x10a3f},
+    {0x10ae5, 0x10ae6}, {0x11001, 0x11001}, {0x11038, 0x11046},
+    {0x1107f, 0x11081}, {0x110b3, 0x110b6}, {0x110b9, 0x110ba},
+    {0x11100, 0x11102}, {0x11127, 0x1112b}, {0x1112d, 0x11134},
+    {0x11173, 0x11173}, {0x11180, 0x11181}, {0x111b6, 0x111be},
+    {0x111ca, 0x111cc}, {0x1122f, 0x11231}, {0x11234, 0x11234},
+    {0x11236, 0x11237}, {0x1123e, 0x1123e}, {0x112df, 0x112df},
+    {0x112e3, 0x112ea}, {0x11300, 0x11301}, {0x1133c, 0x1133c},
+    {0x11340, 0x11340}, {0x11366, 0x1136c}, {0x11370, 0x11374},
+    {0x11438, 0x1143f}, {0x11442, 0x11444}, {0x11446, 0x11446},
+    {0x114b3, 0x114b8}, {0x114ba, 0x114ba}, {0x114bf, 0x114c0},
+    {0x114c2, 0x114c3}, {0x115b2, 0x115b5}, {0x115bc, 0x115bd},
+    {0x115bf, 0x115c0}, {0x115dc, 0x115dd}, {0x11633, 0x1163a},
+    {0x1163d, 0x1163d}, {0x1163f, 0x11640}, {0x116ab, 0x116ab},
+    {0x116ad, 0x116ad}, {0x116b0, 0x116b5}, {0x116b7, 0x116b7},
+    {0x1171d, 0x1171f}, {0x11722, 0x11725}, {0x11727, 0x1172b},
+    {0x11a01, 0x11a06}, {0x11a09, 0x11a0a}, {0x11a33, 0x11a38},
+    {0x11a3b, 0x11a3e}, {0x11a47, 0x11a47}, {0x11a51, 0x11a56},
+    {0x11a59, 0x11a5b}, {0x11a8a, 0x11a96}, {0x11a98, 0x11a99},
+    {0x11c30, 0x11c36}, {0x11c38, 0x11c3d}, {0x11c3f, 0x11c3f},
+    {0x11c92, 0x11ca7}, {0x11caa, 0x11cb0}, {0x11cb2, 0x11cb3},
+    {0x11cb5, 0x11cb6}, {0x11d31, 0x11d36}, {0x11d3a, 0x11d3a},
+    {0x11d3c, 0x11d3d}, {0x11d3f, 0x11d45}, {0x11d47, 0x11d47},
+    {0x16af0, 0x16af4}, {0x16b30, 0x16b36}, {0x16f8f, 0x16f92},
+    {0x1bc9d, 0x1bc9e}, {0x1bca0, 0x1bca3}, {0x1d167, 0x1d169},
+    {0x1d173, 0x1d182}, {0x1d185, 0x1d18b}, {0x1d1aa, 0x1d1ad},
+    {0x1d242, 0x1d244}, {0x1da00, 0x1da36}, {0x1da3b, 0x1da6c},
+    {0x1da75, 0x1da75}, {0x1da84, 0x1da84}, {0x1da9b, 0x1da9f},
+    {0x1daa1, 0x1daaf}, {0x1e000, 0x1e006}, {0x1e008, 0x1e018},
+    {0x1e01b, 0x1e021}, {0x1e023, 0x1e024}, {0x1e026, 0x1e02a},
+    {0x1e8d0, 0x1e8d6}, {0x1e944, 0x1e94a}, {0xe0001, 0xe0001},
+    {0xe0020, 0xe007f}, {0xe0100, 0xe01ef},
+	};
+
+	/* test for 8-bit control characters */
+	if ( ucs == 0 ) {
+		return 0;
+	}
+	if ( ( ucs < 32 ) || ( ( ucs >= 0x7f ) && ( ucs < 0xa0 ) ) ) {
+		return -1;
+	}
+
+	/* binary search in table of non-spacing characters */
+	if ( bisearch( ucs, combining, sizeof( combining ) / sizeof( struct interval ) - 1 ) ) {
+		return 0;
+	}
+
+	/* if we arrive here, ucs is not a combining or C0/C1 control character */
+  return ( mk_is_wide_char( ucs ) ? 2 : 1 );
+}
+
+}
+

third-party/replxx/src/windows.cxx

@@ -0,0 +1,144 @@
+#ifdef _WIN32
+
+#include <iostream>
+
+#include "windows.hxx"
+#include "conversion.hxx"
+#include "terminal.hxx"
+
+using namespace std;
+
+namespace replxx {
+
+WinAttributes WIN_ATTR;
+
+template<typename T>
+T* HandleEsc(HANDLE out_, T* p, T* end) {
+	if (*p == '[') {
+		int code = 0;
+
+		int thisBackground( WIN_ATTR._defaultBackground );
+		for (++p; p < end; ++p) {
+			char32_t c = *p;
+
+			if ('0' <= c && c <= '9') {
+				code = code * 10 + (c - '0');
+			} else if (c == 'm' || c == ';') {
+				switch (code) {
+					case 0:
+						WIN_ATTR._consoleAttribute = WIN_ATTR._defaultAttribute;
+						WIN_ATTR._consoleColor = WIN_ATTR._defaultColor | thisBackground;
+						break;
+					case 1:	// BOLD
+					case 5:	// BLINK
+						WIN_ATTR._consoleAttribute = (WIN_ATTR._defaultAttribute ^ FOREGROUND_INTENSITY) & INTENSITY;
+						break;
+					case 22:
+						WIN_ATTR._consoleAttribute = WIN_ATTR._defaultAttribute;
+						break;
+					case 30:
+					case 90:
+						WIN_ATTR._consoleColor = thisBackground;
+						break;
+					case 31:
+					case 91:
+						WIN_ATTR._consoleColor = FOREGROUND_RED | thisBackground;
+						break;
+					case 32:
+					case 92:
+						WIN_ATTR._consoleColor = FOREGROUND_GREEN | thisBackground;
+						break;
+					case 33:
+					case 93:
+						WIN_ATTR._consoleColor = FOREGROUND_RED | FOREGROUND_GREEN | thisBackground;
+						break;
+					case 34:
+					case 94:
+						WIN_ATTR._consoleColor = FOREGROUND_BLUE | thisBackground;
+						break;
+					case 35:
+					case 95:
+						WIN_ATTR._consoleColor = FOREGROUND_BLUE | FOREGROUND_RED | thisBackground;
+						break;
+					case 36:
+					case 96:
+						WIN_ATTR._consoleColor = FOREGROUND_BLUE | FOREGROUND_GREEN | thisBackground;
+						break;
+					case 37:
+					case 97:
+						WIN_ATTR._consoleColor = FOREGROUND_GREEN | FOREGROUND_RED | FOREGROUND_BLUE | thisBackground;
+						break;
+					case 101:
+						thisBackground = BACKGROUND_RED;
+						break;
+				}
+
+				if ( ( code >= 90 ) && ( code <= 97 ) ) {
+					WIN_ATTR._consoleAttribute = (WIN_ATTR._defaultAttribute ^ FOREGROUND_INTENSITY) & INTENSITY;
+				}
+
+				code = 0;
+			}
+
+			if (*p == 'm') {
+				++p;
+				break;
+			}
+		}
+	} else {
+		++p;
+	}
+
+	SetConsoleTextAttribute(
+		out_,
+		WIN_ATTR._consoleAttribute | WIN_ATTR._consoleColor
+	);
+
+	return p;
+}
+
+int win_write( HANDLE out_, bool autoEscape_, char const* str_, int size_ ) {
+	int count( 0 );
+	if ( tty::out ) {
+		DWORD nWritten( 0 );
+		if ( autoEscape_ ) {
+			WriteConsoleA( out_, str_, size_, &nWritten, nullptr );
+			count = nWritten;
+		} else {
+			char const* s( str_ );
+			char const* e( str_ + size_ );
+			while ( str_ < e ) {
+				if ( *str_ == 27 ) {
+					if ( s < str_ ) {
+						int toWrite( static_cast<int>( str_ - s ) );
+						WriteConsoleA( out_, s, static_cast<DWORD>( toWrite ), &nWritten, nullptr );
+						count += nWritten;
+						if ( nWritten != toWrite ) {
+							s = str_ = nullptr;
+							break;
+						}
+					}
+					s = HandleEsc( out_, str_ + 1, e );
+					int escaped( static_cast<int>( s - str_ ) );
+					count += escaped;
+					str_ = s;
+				} else {
+					++ str_;
+				}
+			}
+
+			if ( s < str_ ) {
+				WriteConsoleA( out_, s, static_cast<DWORD>( str_ - s ), &nWritten, nullptr );
+				count += nWritten;
+			}
+		}
+	} else {
+		count = _write( 1, str_, size_ );
+	}
+	return ( count );
+}
+
+}
+
+#endif
+

third-party/replxx/src/windows.hxx

@@ -0,0 +1,44 @@
+#ifndef REPLXX_WINDOWS_HXX_INCLUDED
+#define REPLXX_WINDOWS_HXX_INCLUDED 1
+
+#include <conio.h>
+#include <windows.h>
+#include <io.h>
+
+namespace replxx {
+
+static const int FOREGROUND_WHITE =
+		FOREGROUND_RED | FOREGROUND_GREEN | FOREGROUND_BLUE;
+static const int BACKGROUND_WHITE =
+		BACKGROUND_RED | BACKGROUND_GREEN | BACKGROUND_BLUE;
+static const int INTENSITY = FOREGROUND_INTENSITY | BACKGROUND_INTENSITY;
+
+class WinAttributes {
+ public:
+	WinAttributes() {
+		CONSOLE_SCREEN_BUFFER_INFO info;
+		GetConsoleScreenBufferInfo(GetStdHandle(STD_OUTPUT_HANDLE), &info);
+		_defaultAttribute = info.wAttributes & INTENSITY;
+		_defaultColor = info.wAttributes & FOREGROUND_WHITE;
+		_defaultBackground = info.wAttributes & BACKGROUND_WHITE;
+
+		_consoleAttribute = _defaultAttribute;
+		_consoleColor = _defaultColor | _defaultBackground;
+	}
+
+ public:
+	int _defaultAttribute;
+	int _defaultColor;
+	int _defaultBackground;
+
+	int _consoleAttribute;
+	int _consoleColor;
+};
+
+int win_write( HANDLE, bool, char const*, int );
+
+extern WinAttributes WIN_ATTR;
+
+}
+
+#endif