ksys/utils/byaml: First iteration of implementation.

4 Functions are still not fully matching with their inlined functions,
and at least one function is still missing.

src/KingSystem/Utils/Byaml/ByamlStringTableIter.cpp

@@ -0,0 +1,50 @@
+#include "KingSystem/Utils/Byaml/ByamlStringTableIter.h"
+#include "KingSystem/Utils/Byaml/Byaml.h"
+#include "KingSystem/Utils/Byaml/ByamlLocal.h"
+
+namespace al {
+
+ByamlStringTableIter::ByamlStringTableIter(const u8* data) {
+    mData = data;
+}
+
+ByamlStringTableIter::ByamlStringTableIter(const ByamlStringTableIter& other) {
+    mData = other.mData;
+}
+
+const char* ByamlStringTableIter::getString(s32 index) const {
+    const u32* string_offset_array = getStringOffsetArray();
+    return reinterpret_cast<const char*>(&mData[string_offset_array[index]]);
+}
+
+s32 ByamlStringTableIter::findStringIndex(const char* string) const {
+    const u32* string_offset_array = getStringOffsetArray();
+    u32 table_size = ByamlLocalUtil::getContainerSize(mData);
+    if (table_size == 0) {
+        return -1;
+    }
+
+    // Binary Search
+    s32 start = 0;
+    s32 end = table_size;
+    s32 index;
+    while (true) {
+        if (start >= end) {
+            return -1;
+        }
+
+        index = (start + end) / 2;
+        const char* str = reinterpret_cast<const char*>(&mData[string_offset_array[index]]);
+        s32 result = std::strcmp(string, str);
+        if (result == 0)
+            break;
+        if (result > 0)
+            start = index + 1;
+        else if (result < 0)
+            end = index;
+    }
+
+    return index;
+}
+
+}  // namespace al