C++字符串编码转换函数

一个windows平台下的字符串编码转换函数

1. string Convert(string str, int sourceCodepage, int targetCodepage) 2. { 3. size_t len=str.length(); 4. size_t unicodeLen=MultiByteToWideChar(sourceCodepage,0,str.c_str(),-1,NULL,0); 5. 6. wchar_t* pUnicode = NULL; 7. pUnicode=new wchar_t[unicodeLen+1]; 8. memset(pUnicode,0,(unicodeLen+1)*sizeof(wchar_t)); 9. MultiByteToWideChar(sourceCodepage,0,str.c_str(),-1,(LPWSTR)pUnicode,(int)unicodeLen); 10. 11. BYTE* pTargetData = NULL; 12. int targetLen=WideCharToMultiByte(targetCodepage,0,(LPWSTR)pUnicode,-1, 13. (char *)pTargetData,0,NULL,NULL); 14. pTargetData=new BYTE[targetLen+1]; 15. memset(pTargetData,0,targetLen+1); 16. 17. WideCharToMultiByte(targetCodepage,0,(LPWSTR)pUnicode,-1, 18. (char*)pTargetData,targetLen,NULL,NULL); 19. string rt((char*)pTargetData); 20. 21. delete [] pUnicode; 22. delete [] pTargetData; 23. return rt; 24. }  

 

使用示例

utf-8转gb2312:

string gb2312 = Convert(utf8,CP_UTF8,936);

gb2312转utf8

string utf8 = Convert(gb2312,936,CP_UTF8)