CC++ 编码转换

(1) iconv_t iconv_open(const char *tocode, const char *fromcode); //此函数说明将要进行哪两种编码的转换,tocode是目标编码,fromcode是原编码,该函数返回一个转换句柄,供以下两个函数使用。 (2) size_t iconv(iconv_t cd,char **inbuf,size_t *inbytesleft,char **outbuf,size_t *outbytesleft); //此函数从inbuf中读取字符,转换后输出到outbuf中,inbytesleft用以记录还未转换的字符数,outbytesleft用以记录输出缓冲的剩余空间。 (3) int iconv_close(iconv_t cd); //此函数用于关闭转换句柄,释放资源。

C++ Linux实现

#ifndef WIN32 #include <iconv.h> #define OUTLEN 500 class CodeConverter { private: iconv_t cd; public: // 构造 CodeConverter(const char *from_charset, const char *to_charset) { cd = iconv_open(to_charset, from_charset); } // 析构 ~CodeConverter() { iconv_close(cd); } // 转换输出 int convert(char *inbuf, int inlen, char *outbuf, int outlen) { char **pin = &inbuf; char **pout = &outbuf; //memset(outbuf, 0, outlen); return iconv(cd, pin, (size_t *)&inlen, pout, (size_t *)&outlen); } }; C Linux实现

char *in_utf8 = "姝ｅ?ㄥ??瑁?"; char *in_gb2312 = "正在安装"; char out[OUTLEN]; /*unicode码转为gb2312码*/ rc = u2g(in_utf8,strlen(in_utf8),out,OUTLEN); printf("unicode-->gb2312 out=%sn",out); //gb2312码转为unicode码 rc = g2u(in_gb2312,strlen(in_gb2312),out,OUTLEN); printf("gb2312-->unicode out=%sn",out); } /*代码转换:从一种编码转为另一种编码*/ int code_convert(char *from_charset,char *to_charset,char *inbuf,int inlen,char *outbuf,int outlen) { iconv_t cd; int rc; char **pin = &inbuf; char **pout = &outbuf; cd = iconv_open(to_charset,from_charset); if (cd==0) return -1; memset(outbuf,0,outlen); if (iconv(cd,pin,&inlen,pout,&outlen)==-1) return -1; iconv_close(cd); return 0; } /*UNICODE码转为GB2312码*/ int u2g(char *inbuf,int inlen,char *outbuf,int outlen) { return code_convert("utf-8","gb2312",inbuf,inlen,outbuf,outlen); } /*GB2312码转为UNICODE码*/ int g2u(char *inbuf,size_t inlen,char *outbuf,size_t outlen) { return code_convert("gb2312","utf-8",inbuf,inlen,outbuf,outlen); }

转换接口

string UTF8ToANSI(const string str) { #ifdef WIN32 return UnicodeToANSI(UTF8ToUnicode(str)); #else static char out[OUTLEN] = { 0 }; memset(out, 0, OUTLEN); // utf-8-->gb2312 char* pTmp = (char*)str.c_str(); CodeConverter cc = CodeConverter("utf-8", "gb2312"); cc.convert(pTmp,strlen(pTmp), out, OUTLEN); ::string strtmp(out, strlen(out)); return strtmp; #endif } string ANSIToUTF8(const string str) { #ifdef WIN32 return UnicodeToUTF8(ANSIToUnicode(str)); #else static char out[OUTLEN]; memset(out, 0, OUTLEN); CodeConverter cc2 = CodeConverter("gb2312", "utf-8"); cc2.convert((char*)str.c_str(), str.length(), out, OUTLEN); ::string strtmp (out, strlen(out)); return strtmp; #endif }

windows实现

ANSI TO UFT8

string UnicodeToUTF8(const wstring& str) { #ifdef WIN32 char* pElementText; int iTextLen; iTextLen = WideCharToMultiByte(CP_UTF8, 0, str.c_str(), -1, NULL, 0, NULL, NULL); pElementText = new char[iTextLen + 1]; memset((void*)pElementText, 0, sizeof(char) * (iTextLen + 1)); ::WideCharToMultiByte(CP_UTF8, 0, str.c_str(), -1, pElementText, iTextLen, NULL, NULL); string strText; strText = pElementText; delete[] pElementText; return strText; #else return ""; #endif } wstring ANSIToUnicode(const string& str) { #ifdef WIN32 int len = 0; len = str.length(); int unicodeLen = ::MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, NULL, 0); wchar_t * pUnicode; pUnicode = new wchar_t[unicodeLen + 1]; memset(pUnicode, 0, (unicodeLen + 1) * sizeof(wchar_t)); ::MultiByteToWideChar(CP_ACP, 0, str.c_str(), -1, (LPWSTR)pUnicode, unicodeLen); wstring rt; rt = (wchar_t*)pUnicode; delete pUnicode; return rt; #else wstring rt; return rt;

UTF8 TO ANSI

wstring UTF8ToUnicode(const string& str) { #ifdef WIN32 int len = 0; len = str.length(); int unicodeLen = ::MultiByteToWideChar(CP_UTF8,0,str.c_str(),-1,NULL,0); wchar_t * pUnicode; pUnicode = new wchar_t[unicodeLen + 1]; memset(pUnicode, 0, (unicodeLen + 1) * sizeof(wchar_t)); ::MultiByteToWideChar(CP_UTF8, 0, str.c_str(), -1, (LPWSTR)pUnicode, unicodeLen); wstring rt; rt = (wchar_t*)pUnicode; delete pUnicode; return rt; #else wstring rt; return rt; #endif } string UnicodeToANSI(const wstring& str) { #ifdef WIN32 char* pElementText; int iTextLen; // wide char to multi char iTextLen = WideCharToMultiByte(CP_ACP,0,str.c_str(),-1,NULL,0,NULL,NULL); pElementText = new char[iTextLen + 1]; memset((void*)pElementText, 0, sizeof(char) * (iTextLen + 1)); ::WideCharToMultiByte(CP_ACP, 0, str.c_str(), -1, pElementText, iTextLen, NULL, NULL); string strText; strText = pElementText; delete[] pElementText; return strText;