问题描述
我收到字符串^
其中包含从C#组件在我的C ++的WinRT组件的回调在Cocos2dx游戏的Windows Phone 8项目的一些印度语字符。
每当我将它转换为的std ::字符串
的印地文和其他字符转向到乱码。我无法找到为什么发生这种情况。
下面是一个示例代码,我刚才定义平台::字符串^
在这里,但考虑它传递给 C ++的WinRT组件
从C#组件
字符串^海峡= Lविकास,વિકાસ,ਵਿਕਾਸ,维卡斯
的std :: wstring的wsstr(STR-GT&;数据());
标准::字符串资源(wsstr.begin(),wsstr.end());
编辑:看的一个更好的便携式解决方案。
问题是,的std ::字符串
仅持有8位字符数据和平台::字符串^
保存Unicode数据。 Windows提供的功能调用WideCharToMultiByte
和的MultiByteToWideChar
来来回转换:
的std ::字符串make_string(常量的std :: wstring的&安培; wstring的)
{
自动wideData = wstring.c_str();
INT BUFFERSIZE =调用WideCharToMultiByte(CP_UTF8,0,wideData,-1,nullptr,0,NULL,NULL);
自动= UTF8的std :: make_unique<的char []>(缓冲区大小);
如果(0 ==调用WideCharToMultiByte(CP_UTF8,0,wideData,-1,utf8.get(),缓冲区大小,NULL,NULL))
抛出std ::异常(无法字符串转换为UTF8);
返回的std ::字符串(utf8.get());
}
的std :: wstring的make_wstring(常量标准::字符串&放大器;字符串)
{
自动utf8Data = string.c_str();
INT BUFFERSIZE =的MultiByteToWideChar(CP_UTF8,0,utf8Data,-1,nullptr,0);
自动宽=的std :: make_unique< wchar_t的[]>(缓冲区大小);
如果(0 ==的MultiByteToWideChar(CP_UTF8,0,utf8Data,-1,wide.get(),缓冲区大小))
抛出std ::例外(不能把字符串转换为Unicode);
返回的std :: wstring的(wide.get());
}
无效测试()
{
平台::字符串^海峡= Lविकास,વિકાસ,ਵਿਕਾਸ,维卡斯
的std :: wstring的wsstr(STR-GT&;数据());
自动utf8Str = make_string(wsstr); // UTF8编码的文本
wsstr = make_wstring(utf8Str); //一样原文
}
I am getting String^
which Contains some Indian language characters in a callback from C# Component in my C++ WinRT Component in a Cocos2dx game for Windows Phone 8 project.
Whenever I convert it to std::string
the Hindi and other characters turn in to garbage characters. I'm not able to find why this is happening.
Here is a sample code and I have just defined Platform::String^
here but consider it's passed to C++ WinRT Component
from C# Component
String^ str = L"विकास, વિકાસ, ਵਿਕਾਸ, Vikas";
std::wstring wsstr(str->Data());
std::string res(wsstr.begin(), wsstr.end());
Edit: see this answer for a better portable solution.
The problem is that std::string
only holds 8-bit character data and your Platform::String^
holds Unicode data. Windows provides functions WideCharToMultiByte
and MultiByteToWideChar
to convert back and forth:
std::string make_string(const std::wstring& wstring)
{
auto wideData = wstring.c_str();
int bufferSize = WideCharToMultiByte(CP_UTF8, 0, wideData, -1, nullptr, 0, NULL, NULL);
auto utf8 = std::make_unique<char[]>(bufferSize);
if (0 == WideCharToMultiByte(CP_UTF8, 0, wideData, -1, utf8.get(), bufferSize, NULL, NULL))
throw std::exception("Can't convert string to UTF8");
return std::string(utf8.get());
}
std::wstring make_wstring(const std::string& string)
{
auto utf8Data = string.c_str();
int bufferSize = MultiByteToWideChar(CP_UTF8, 0, utf8Data, -1, nullptr, 0);
auto wide = std::make_unique<wchar_t[]>(bufferSize);
if (0 == MultiByteToWideChar(CP_UTF8, 0, utf8Data, -1, wide.get(), bufferSize))
throw std::exception("Can't convert string to Unicode");
return std::wstring(wide.get());
}
void Test()
{
Platform::String^ str = L"विकास, વિકાસ, ਵਿਕਾਸ, Vikas";
std::wstring wsstr(str->Data());
auto utf8Str = make_string(wsstr); // UTF8-encoded text
wsstr = make_wstring(utf8Str); // same as original text
}
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