QString將中文傳給std::string

記錄一下：

QString qStr = "哈哈";

string str = qStr.toUtf8().data();

str = CGb2312String(str.c_str());

CGb2312String， CUtf8String 轉變到相應的編碼格式，很有用的兩個類。

#include <Windows.h>


class CUtf8String  
{  
public:  
inline CUtf8String(const char* gb2312)  
{  
m_bIsConst = true;  
#ifdef TEST_TYPE_MAP  
if (m[gb2312])  
{  
m_utf8 = m[gb2312];  
return ;  
}  
#endif  
int buffLen = 0;  
WCHAR wbuff[5120];  
MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wbuff, 5120);  
buffLen = WideCharToMultiByte(CP_UTF8, 0, wbuff, -1, NULL, 0, 0, 0);  
m_utf8 = new char[buffLen+1];  
WideCharToMultiByte(CP_UTF8, 0, wbuff, -1, (LPSTR)m_utf8, buffLen, 0, 0);  
#ifdef TEST_TYPE_MAP  
m[gb2312] = m_utf8;  
#endif  
}  


inline CUtf8String(char* gb2312)  
{  
m_bIsConst = false;  
int buffLen = 0;  
WCHAR wbuff[5120];  
MultiByteToWideChar(CP_ACP, 0, gb2312, -1, wbuff, 5120);  
buffLen = WideCharToMultiByte(CP_UTF8, 0, wbuff, -1, NULL, 0, 0, 0);  
m_utf8 = new char[buffLen+1];  
WideCharToMultiByte(CP_UTF8, 0, wbuff, -1, (LPSTR)m_utf8, buffLen, 0, 0);  
}  


inline ~CUtf8String()  
{  
#ifndef TEST_TYPE_MAP  
if (m_utf8)  
{  
delete m_utf8;  
m_utf8 = 0;  
}  
#else  
if (!m_bIsConst)  
{  
if (m_utf8)  
{  
delete m_utf8;  
m_utf8 = 0;  
}  
}  
#endif  
}  


inline operator char*()  
{  
return (char*)m_utf8;  
}  
private:  
const char* m_utf8;  
bool m_bIsConst;  
#ifdef TEST_TYPE_MAP  
static strmap m;  
#endif  
};  


class CGb2312String  
{  
public:  
inline CGb2312String(const char* utf8)  
{  
#ifdef TEST_TYPE_MAP  
if (m[utf8])  
{  
m_gb2312 = 0;  
m_gb2312 = m[utf8];  
}  
#endif  
int buffLen = 0;  
WCHAR wbuff[5120];  
MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wbuff, 5120);  
buffLen = WideCharToMultiByte(CP_ACP, 0, wbuff, -1, NULL, 0, 0, 0);  
m_gb2312 = new char[buffLen+1];  
WideCharToMultiByte(CP_ACP, 0, wbuff, -1, (LPSTR)m_gb2312, buffLen, 0, 0);  
#ifdef TEST_TYPE_MAP  
m[utf8] = m_gb2312;  
#endif  
}  


inline CGb2312String(char* utf8)  
{  
#ifdef TEST_TYPE_MAP  
if (m[utf8])  
{  
m_gb2312 = 0;  
m_gb2312 = m[utf8];  
}  
#endif  
int buffLen = 0;  
WCHAR wbuff[5120];  
MultiByteToWideChar(CP_UTF8, 0, utf8, -1, wbuff, 5120);  
buffLen = WideCharToMultiByte(CP_ACP, 0, wbuff, -1, NULL, 0, 0, 0);  
m_gb2312 = new char[buffLen+1];  
WideCharToMultiByte(CP_ACP, 0, wbuff, -1, (LPSTR)m_gb2312, buffLen, 0, 0);  
#ifdef TEST_TYPE_MAP  
m[utf8] = m_gb2312;  
#endif  
}  


inline ~CGb2312String()  
{  
#ifndef TEST_TYPE_MAP  
if (m_gb2312)  
{  
delete m_gb2312;  
m_gb2312 = 0;  
}  
#endif  
}  


inline operator char*()  
{  
return (char*)m_gb2312;  
}  
private:  
const char* m_gb2312;  
#ifdef TEST_TYPE_MAP  
static strmap m;  
#endif  
};