C++ GB2312 和 utf8 在win32下 互轉

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 1 string ANSItoUTF8(const char* strAnsi) 2 { 3     //擷取轉換為寬位元組後需要的緩衝區大小，建立寬位元組緩衝區，936為簡體中文GB2312字碼頁   4     int nLen = MultiByteToWideChar(CP_ACP, NULL, strAnsi, -1, NULL, NULL); 5     WCHAR *wszBuffer = new WCHAR[nLen + 1]; 6     nLen = MultiByteToWideChar(CP_ACP, NULL, strAnsi, -1, wszBuffer, nLen); 7     wszBuffer[nLen] = 0; 8     //擷取轉為UTF8多位元組後需要的緩衝區大小，建立多位元組緩衝區   9     nLen = WideCharToMultiByte(CP_UTF8, NULL, wszBuffer, -1, NULL, NULL, NULL, NULL);10     CHAR *szBuffer = new CHAR[nLen + 1];11     nLen = WideCharToMultiByte(CP_UTF8, NULL, wszBuffer, -1, szBuffer, nLen, NULL, NULL);12     szBuffer[nLen] = 0;13 14     string s1 = szBuffer;15     //記憶體清理  16     delete[]wszBuffer;17     delete[]szBuffer;18     return s1;19 }20 21 string UTF8toANSI(const char* strUTF8)22 {23     //擷取轉換為多位元組後需要的緩衝區大小，建立多位元組緩衝區  24     int nLen = MultiByteToWideChar(CP_UTF8, NULL, strUTF8, -1, NULL, NULL);25     WCHAR *wszBuffer = new WCHAR[nLen + 1];26     nLen = MultiByteToWideChar(CP_UTF8, NULL, strUTF8, -1, wszBuffer, nLen);27     wszBuffer[nLen] = 0;28 29     nLen = WideCharToMultiByte(936, NULL, wszBuffer, -1, NULL, NULL, NULL, NULL);30     CHAR *szBuffer = new CHAR[nLen + 1];31     nLen = WideCharToMultiByte(936, NULL, wszBuffer, -1, szBuffer, nLen, NULL, NULL);32     szBuffer[nLen] = 0;33 34     string s1 = szBuffer;35     //清理記憶體  36     delete[]szBuffer;37     delete[]wszBuffer;38     return s1;39 }

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C++ GB2312 和 utf8 在win32下 互轉