char, WCHAR, CString之间的转换

最新推荐文章于 2020-04-23 21:33:18 发布

原创最新推荐文章于 2020-04-23 21:33:18 发布 · 921 阅读

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本文详细介绍了在不同字符集间进行转换的方法，包括字符转宽字符、宽字符转字符、字符串转字符以及字符串转宽字符的过程。通过使用C++标准库提供的函数，如MultiByteToWideChar和WideCharToMultiByte，实现数据格式间的灵活转换。

1. char --> WCHAR

MultiByteToWideChar

int ConvertCharToWChar(char* pMultiByteStr, WCHAR* pWideCharStr, size_t BytesOfWideCharStr)
{
    memset(pWideCharStr, 0, BytesOfWideCharStr);
    return MultiByteToWideChar(CP_ACP,0, pMultiByteStr, -1, pWideCharStr, BytesOfWideCharStr / 2 - 1);
}

2. WCHAR --> char

WideCharToMultiByte

int ConvertWCharToChar(WCHAR* pWideCharStr, char* pMultiByteStr, size_t BytesOfCharStr)
{
    memset(pMultiByteStr, 0, BytesOfCharStr);
    return WideCharToMultiByte(CP_ACP, 0, pWideCharStr, -1, pMultiByteStr, BytesOfCharStr - 1, NULL, NULL);
}

3. CString --> char

void ConvertCStringToChar(CString& source, char* pMultiByteStr, size_t BytesOfCharStr)
{
    memset(pMultiByteStr, 0, BytesOfCharStr);
    char* dest = pMultiByteStr;
    LPTSTR p = source.GetBuffer();
#ifdef UNICODE
    WideCharToMultiByte(CP_ACP, 0, p, -1, dest, BytesOfCharStr - 1, NULL, NULL);
    dest[BytesOfCharStr - 1] = '\0';
#else  /*UNICODE*/
    int i = 0;
    for (; i < (BytesOfCharStr - 1) && p[i] != 0; i++)
    {
        dest[i] = p[i];
    }
    dest[i] = 0;
#endif /*UNICODE*/
}

4. CString --> WCHAR

void ConvertCStringToWChar(CString& source, WCHAR* pWideCharStr, size_t BytesOfWideCharStr)
{
    memset(pWideCharStr, 0, BytesOfWideCharStr);
    WCHAR* dest = pWideCharStr;
    int length  = BytesOfWideCharStr / 2;
    LPTSTR p    = source.GetBuffer();
#ifdef UNICODE
    int i = 0;
    for (; i < (length - 1) && p[i] != 0; i++ )
    {
        dest[i] = p[i];
    }
    dest[i] = 0;
#else  /*UNICODE*/
    MultiByteToWideChar(CP_ACP,0, p, -1, dest, length - 1);
    dest[length - 1] = 0;
#endif /*UNICODE*/
}

5. char --> CString

6. WCHAR --> CString