feat: finish windows encoding
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@ -5,6 +5,7 @@
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#include "../string/reinterpret.hpp"
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#include <limits>
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#include <stdexcept>
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#include <cuchar>
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#include "../windows/import_guard_head.hpp"
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#include <Windows.h>
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@ -56,20 +57,13 @@ namespace yycc::encoding::windows {
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// do convertion
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// do a dry-run first to fetch desired size.
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int desired_size
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= WideCharToMultiByte(code_page, 0, lpWideCharStr, cchWideChar, NULL, 0, NULL, NULL);
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int desired_size = WideCharToMultiByte(code_page, 0, lpWideCharStr, cchWideChar, NULL, 0, NULL, NULL);
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if (desired_size <= 0) return ConvError::NoDesiredSize;
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// resize dest for receiving result
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dst.resize(static_cast<size_t>(desired_size));
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// do real convertion
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int write_result = WideCharToMultiByte(code_page,
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0,
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lpWideCharStr,
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cchWideChar,
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reinterpret_cast<LPSTR>(dst.data()),
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desired_size,
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NULL,
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NULL);
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int write_result
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= WideCharToMultiByte(code_page, 0, lpWideCharStr, cchWideChar, reinterpret_cast<LPSTR>(dst.data()), desired_size, NULL, NULL);
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if (write_result <= 0) return ConvError::BadWrittenSize;
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return dst;
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@ -111,12 +105,7 @@ namespace yycc::encoding::windows {
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// resize dest for receiving result
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dst.resize(static_cast<size_t>(desired_size));
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// do real convertion
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int write_result = MultiByteToWideChar(code_page,
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0,
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lpMultiByteStr,
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cbMultiByte,
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reinterpret_cast<LPWSTR>(dst.data()),
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desired_size);
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int write_result = MultiByteToWideChar(code_page, 0, lpMultiByteStr, cbMultiByte, reinterpret_cast<LPWSTR>(dst.data()), desired_size);
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if (write_result <= 0) return ConvError::BadWrittenSize;
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return dst;
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@ -147,16 +136,11 @@ namespace yycc::encoding::windows {
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return second_rv;
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}
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bool to_char(const std::string_view& src,
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std::string& dst,
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CodePage src_code_page,
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CodePage dst_code_page) {
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bool to_char(const std::string_view& src, std::string& dst, CodePage src_code_page, CodePage dst_code_page) {
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CONVFN_TYPE1(to_char, char, char, src_code_page, dst_code_page);
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}
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std::string to_char(const std::string_view& src,
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CodePage src_code_page,
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CodePage dst_code_page) {
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std::string to_char(const std::string_view& src, CodePage src_code_page, CodePage dst_code_page) {
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CONVFN_TYPE2(to_char, char, char, src_code_page, dst_code_page);
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}
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@ -226,8 +210,7 @@ namespace yycc::encoding::windows {
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#pragma region UTF8 -> Char
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ConvResult<std::string> priv_to_char(const NS_YYCC_STRING::u8string_view& src,
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CodePage code_page) {
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ConvResult<std::string> priv_to_char(const NS_YYCC_STRING::u8string_view& src, CodePage code_page) {
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return priv_to_char(NS_YYCC_STRING_REINTERPRET::as_ordinary_view(src), CP_UTF8, code_page);
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}
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@ -246,6 +229,134 @@ namespace yycc::encoding::windows {
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// These function is locale related in C++ standard, but in Microsoft STL, it's only for UTF8.
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// So we can use them safely in Win32 environment.
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// 1 UTF32 unit can produe 4 UTF8 units or 2 UTF16 units in theory.
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// So we pre-allocate memory for the result to prevent allocating memory multiple times.
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constexpr size_t MULTIPLE_UTF8_TO_UTF16 = 1u;
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constexpr size_t MULTIPLE_UTF16_TO_UTF8 = 2u;
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constexpr size_t MULTIPLE_UTF8_TO_UTF32 = 1u;
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constexpr size_t MULTIPLE_UTF32_TO_UTF8 = 4u;
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#pragma region UTF8 -> UTF16
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ConvResult<std::u16string> priv_to_utf16(const NS_YYCC_STRING::u8string_view& src) {
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std::u16string dst;
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dst.reserve(src.size() * MULTIPLE_UTF8_TO_UTF16);
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std::mbstate_t state{}; // zero-initialized to initial state
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char16_t c16;
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const char* ptr = reinterpret_cast<const char*>(src.data());
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const char* end = ptr + src.size();
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while (ptr < end) {
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size_t rc = std::mbrtoc16(&c16, ptr, end - ptr, &state);
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if (rc == (size_t) -1) return ConvError::EncodeUtf8;
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else if (rc == (size_t) -2) return ConvError::IncompleteUtf8;
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else if (rc != (size_t) -3) dst.push_back(c16); // from earlier surrogate pair
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else {
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dst.push_back(c16);
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ptr += rc;
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}
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}
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return dst;
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}
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bool to_utf16(const NS_YYCC_STRING::u8string_view& src, std::u16string& dst) {
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CONVFN_TYPE1(to_utf16, NS_YYCC_STRING::u8char, char16_t);
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}
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std::u16string to_utf16(const NS_YYCC_STRING::u8string_view& src) {
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CONVFN_TYPE2(to_utf16, NS_YYCC_STRING::u8char, char16_t);
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}
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#pragma endregion
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#pragma region UTF16 -> UTF8
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ConvResult<NS_YYCC_STRING::u8string> priv_to_utf8(const std::u16string_view& src) {
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NS_YYCC_STRING::u8string dst;
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dst.reserve(src.size() * MULTIPLE_UTF16_TO_UTF8);
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std::mbstate_t state{};
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char mbout[MB_LEN_MAX]{};
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for (char16_t c : src) {
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std::size_t rc = std::c16rtomb(mbout, c, &state);
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if (rc != (std::size_t) -1) dst.append(reinterpret_cast<NS_YYCC_STRING::u8char*>(mbout), rc);
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else return ConvError::InvalidUtf16;
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}
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return dst;
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}
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bool to_utf8(const std::u16string_view& src, NS_YYCC_STRING::u8string& dst) {
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CONVFN_TYPE1(to_utf8, char16_t, NS_YYCC_STRING::u8char);
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}
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NS_YYCC_STRING::u8string to_utf8(const std::u16string_view& src) {
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CONVFN_TYPE2(to_utf8, char16_t, NS_YYCC_STRING::u8char);
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}
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#pragma endregion
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#pragma region UTF8 -> UTF32
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ConvResult<std::u32string> priv_to_utf32(const NS_YYCC_STRING::u8string_view& src) {
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std::u32string dst;
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dst.reserve(src.size() * MULTIPLE_UTF8_TO_UTF32);
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std::mbstate_t state{};
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char32_t c32;
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const char* ptr = reinterpret_cast<const char*>(src.data());
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const char* end = ptr + src.size();
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while (ptr < end) {
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size_t rc = std::mbrtoc32(&c32, ptr, end - ptr, &state);
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if (rc == (size_t) -1) return ConvError::EncodeUtf8;
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else if (rc == (size_t) -2) return ConvError::IncompleteUtf8;
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else if (rc != (size_t) -3) throw std::runtime_error("no surrogates in UTF-32");
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else dst.push_back(c32);
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ptr += rc;
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}
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return dst;
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}
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bool to_utf32(const NS_YYCC_STRING::u8string_view& src, std::u32string& dst) {
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CONVFN_TYPE1(to_utf32, NS_YYCC_STRING::u8char, char32_t);
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}
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std::u32string to_utf32(const NS_YYCC_STRING::u8string_view& src) {
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CONVFN_TYPE2(to_utf32, NS_YYCC_STRING::u8char, char32_t);
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}
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#pragma endregion
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#pragma region UTF32 -> UTF8
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ConvResult<NS_YYCC_STRING::u8string> priv_to_utf8(const std::u32string_view& src) {
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NS_YYCC_STRING::u8string dst;
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dst.reserve(src.size() * MULTIPLE_UTF32_TO_UTF8);
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std::mbstate_t state{};
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char mbout[MB_LEN_MAX]{};
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for (char32_t c : src) {
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std::size_t rc = std::c32rtomb(mbout, c, &state);
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if (rc != (std::size_t) -1) dst.append(reinterpret_cast<NS_YYCC_STRING::u8char*>(mbout), rc);
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else return ConvError::InvalidUtf32;
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}
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return dst;
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}
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bool to_utf8(const std::u32string_view& src, NS_YYCC_STRING::u8string& dst) {
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CONVFN_TYPE1(to_utf8, char32_t, NS_YYCC_STRING::u8char);
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}
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NS_YYCC_STRING::u8string to_utf8(const std::u32string_view& src) {
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CONVFN_TYPE2(to_utf8, char32_t, NS_YYCC_STRING::u8char);
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}
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#pragma endregion
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#undef CONVFN_TYPE1
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#undef CONVFN_TYPE2
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@ -19,6 +19,10 @@ namespace yycc::encoding::windows {
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TooLargeLength, ///< The length of given string is too large exceeding the maximum capacity of Win32 function.
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NoDesiredSize, ///< Can not compute the desired size of result string.
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BadWrittenSize, ///< The size of written data is not matched with expected size.
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InvalidUtf32, ///< Given char is invalid in UTF32.
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InvalidUtf16, ///< Given char is invalid in UTF16.
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EncodeUtf8, ///< Error occurs when encoding UTF8.
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IncompleteUtf8, ///< Given UTF8 string is incomplete.
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};
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/// @private
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@ -38,7 +42,7 @@ namespace yycc::encoding::windows {
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// Char -> Char
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// This is the combination of "WChar -> Char" and "Char -> WChar"
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ConvResult<std::string> priv_to_char(const std::string_view& src, CodePage src_code_page, CodePage dst_code_page);
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bool to_char(const std::string_view& src, std::string& dst, CodePage src_code_page, CodePage dst_code_page);
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bool to_char(const std::string_view& src, std::string& dst, CodePage src_code_page, CodePage dst_code_page);
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std::string to_char(const std::string_view& src, CodePage src_code_page, CodePage dst_code_page);
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// WChar -> UTF8
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