mirror of
https://github.com/libretro/MesenCE.git
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74 lines
1.6 KiB
C++
74 lines
1.6 KiB
C++
#include "pch.h"
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#include "UTF8Util.h"
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#if defined(__APPLE__) || defined(LIBRETRO)
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#include <codecvt>
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#include <locale>
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#else
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#include <cuchar>
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#endif
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#ifdef _MSC_VER
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#define WIN32_LEAN_AND_MEAN
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#include <Windows.h>
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#undef WIN32_LEAN_AND_MEAN
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#endif
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namespace utf8
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{
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std::wstring utf8::decode(const std::string& str)
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{
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#ifdef _MSC_VER
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std::wstring ret;
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int len = MultiByteToWideChar(CP_UTF8, 0, str.c_str(), (int)str.length(), NULL, 0);
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if(len > 0) {
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ret.resize(len);
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MultiByteToWideChar(CP_UTF8, 0, str.c_str(), (int)str.length(), &ret[0], len);
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}
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return ret;
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#else
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throw std::runtime_error("utf8::decode is not implemented for this platform");
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#endif
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}
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string utf8::encode(const std::wstring& wstr)
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{
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#ifdef _WIN32
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return encode(std::u16string((char16_t*)wstr.c_str()));
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#else
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throw std::runtime_error("utf8::encode(wstring) is not implemented for this platform");
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#endif
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}
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string utf8::encode(const std::u16string& wstr)
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{
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#if defined(__APPLE__) || defined(LIBRETRO)
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std::wstring_convert<std::codecvt_utf8_utf16<char16_t>, char16_t> conv;
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return conv.to_bytes(wstr);
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#else
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std::mbstate_t state {};
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string result;
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result.reserve(wstr.size());
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char buffer[10];
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for(char16_t c16 : wstr) {
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size_t size = std::c16rtomb(buffer, c16, &state);
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if(size == (size_t)-1) {
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//Ignore invalid characters
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continue;
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} else if(size > 0) {
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result.append(buffer, size);
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}
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}
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return result;
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#endif
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}
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#ifdef LIBRETRO
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//Key functions for the VFS-backed streams - see the comment in UTF8Util.h.
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ifstream::~ifstream() {}
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ofstream::~ofstream() {}
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#endif
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}
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