112 lines
3.8 KiB
C++
112 lines
3.8 KiB
C++
#pragma once
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#include <cstdint>
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#include <string>
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#include <vector>
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// TODO: reimplement this structure in endian-independent way
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struct unicode_cpt_flags {
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enum {
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UNDEFINED = 0x0001,
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NUMBER = 0x0002, // regex: \p{N}
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LETTER = 0x0004, // regex: \p{L}
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SEPARATOR = 0x0008, // regex: \p{Z}
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ACCENT_MARK = 0x0010, // regex: \p{M}
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PUNCTUATION = 0x0020, // regex: \p{P}
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SYMBOL = 0x0040, // regex: \p{S}
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CONTROL = 0x0080, // regex: \p{C}
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MASK_CATEGORIES = 0x00FF,
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WHITESPACE = 0x0100,
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LOWERCASE = 0x0200,
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UPPERCASE = 0x0400,
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NFD = 0x0800,
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};
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// codepoint type
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uint16_t is_undefined : 1;
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uint16_t is_number : 1; // regex: \p{N}
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uint16_t is_letter : 1; // regex: \p{L}
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uint16_t is_separator : 1; // regex: \p{Z}
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uint16_t is_accent_mark : 1; // regex: \p{M}
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uint16_t is_punctuation : 1; // regex: \p{P}
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uint16_t is_symbol : 1; // regex: \p{S}
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uint16_t is_control : 1; // regex: \p{C}
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// helper flags
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uint16_t is_whitespace : 1; // regex: \s
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uint16_t is_lowercase : 1;
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uint16_t is_uppercase : 1;
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uint16_t is_nfd : 1;
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// decode from uint16
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inline unicode_cpt_flags(const uint16_t flags = 0) {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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*reinterpret_cast<uint16_t*>(this) = flags;
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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is_undefined = (flags & UNDEFINED) ? 1 : 0;
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is_number = (flags & NUMBER) ? 1 : 0;
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is_letter = (flags & LETTER) ? 1 : 0;
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is_separator = (flags & SEPARATOR) ? 1 : 0;
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is_accent_mark = (flags & ACCENT_MARK) ? 1 : 0;
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is_punctuation = (flags & PUNCTUATION) ? 1 : 0;
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is_symbol = (flags & SYMBOL) ? 1 : 0;
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is_control = (flags & CONTROL) ? 1 : 0;
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is_whitespace = (flags & WHITESPACE) ? 1 : 0;
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is_lowercase = (flags & LOWERCASE) ? 1 : 0;
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is_uppercase = (flags & UPPERCASE) ? 1 : 0;
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is_nfd = (flags & NFD) ? 1 : 0;
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#else
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#error Unexpected or undefined __BYTE_ORDER__
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#endif
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}
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inline uint16_t as_uint() const {
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#if __BYTE_ORDER__ == __ORDER_LITTLE_ENDIAN__
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return *reinterpret_cast<const uint16_t*>(this);
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#elif __BYTE_ORDER__ == __ORDER_BIG_ENDIAN__
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uint16_t result =
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is_undefined * UNDEFINED
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+ is_number * NUMBER
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+ is_letter * LETTER
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+ is_separator * SEPARATOR
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+ is_accent_mark * ACCENT_MARK
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+ is_punctuation * PUNCTUATION
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+ is_symbol * SYMBOL
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+ is_control * CONTROL
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+ is_whitespace * WHITESPACE
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+ is_lowercase * LOWERCASE
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+ is_uppercase * UPPERCASE
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+ is_nfd * NFD
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;
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return result;
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#else
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#error Unexpected or undefined __BYTE_ORDER__
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#endif
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}
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inline uint16_t category_flag() const {
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return this->as_uint() & MASK_CATEGORIES;
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}
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};
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size_t unicode_len_utf8(char src);
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std::string unicode_cpt_to_utf8 (uint32_t cpt);
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uint32_t unicode_cpt_from_utf8(const std::string & utf8, size_t & offset);
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std::vector<uint32_t> unicode_cpts_from_utf8(const std::string & utf8);
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std::vector<uint32_t> unicode_cpts_normalize_nfd(const std::vector<uint32_t> & cpts);
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unicode_cpt_flags unicode_cpt_flags_from_cpt (uint32_t cpt);
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unicode_cpt_flags unicode_cpt_flags_from_utf8(const std::string & utf8);
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std::string unicode_byte_to_utf8(uint8_t byte);
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uint8_t unicode_utf8_to_byte(const std::string & utf8);
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uint32_t unicode_tolower(uint32_t cpt);
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bool unicode_cpt_is_han(uint32_t cpt);
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std::vector<std::string> unicode_regex_split(const std::string & text, const std::vector<std::string> & regex_exprs);
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