【转】几个字符串编码转换实现
- #include <stdio.h>
- #include <windows.h>
- #include <locale.h>
- #define BUFF_SIZE 1024
- wchar_t * ANSIToUnicode( const char* str )
- {
- int textlen ;
- wchar_t * result;
- textlen = MultiByteToWideChar( CP_ACP, 0, str,-1, NULL,0 );
- result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));
- memset(result,0,(textlen+1)*sizeof(wchar_t));
- MultiByteToWideChar(CP_ACP, 0,str,-1,(LPWSTR)result,textlen );
- return result;
- }
- char * UnicodeToANSI( const wchar_t* str )
- {
- char* result;
- int textlen;
- textlen = WideCharToMultiByte( CP_ACP, 0, str, -1, NULL, 0, NULL, NULL );
- result =(char *)malloc((textlen+1)*sizeof(char));
- memset( result, 0, sizeof(char) * ( textlen + 1 ) );
- WideCharToMultiByte( CP_ACP, 0, str, -1, result, textlen, NULL, NULL );
- return result;
- }
- wchar_t * UTF8ToUnicode( const char* str )
- {
- int textlen ;
- wchar_t * result;
- textlen = MultiByteToWideChar( CP_UTF8, 0, str,-1, NULL,0 );
- result = (wchar_t *)malloc((textlen+1)*sizeof(wchar_t));
- memset(result,0,(textlen+1)*sizeof(wchar_t));
- MultiByteToWideChar(CP_UTF8, 0,str,-1,(LPWSTR)result,textlen );
- return result;
- }
- char * UnicodeToUTF8( const wchar_t* str )
- {
- char* result;
- int textlen;
- textlen = WideCharToMultiByte( CP_UTF8, 0, str, -1, NULL, 0, NULL, NULL );
- result =(char *)malloc((textlen+1)*sizeof(char));
- memset(result, 0, sizeof(char) * ( textlen + 1 ) );
- WideCharToMultiByte( CP_UTF8, 0, str, -1, result, textlen, NULL, NULL );
- return result;
- }
- /*宽字符转换为多字符Unicode - ANSI*/
- char* w2m(const wchar_t* wcs)
- {
- int len;
- char* buf;
- len =wcstombs(NULL,wcs,0);
- if (len == 0)
- return NULL;
- buf = (char *)malloc(sizeof(char)*(len+1));
- memset(buf, 0, sizeof(char) *(len+1));
- len =wcstombs(buf,wcs,len+1);
- return buf;
- }
- /*多字符转换为宽字符ANSI - Unicode*/
- wchar_t* m2w(const char* mbs)
- {
- int len;
- wchar_t* buf;
- len =mbstowcs(NULL,mbs,0);
- if (len == 0)
- return NULL;
- buf = (wchar_t *)malloc(sizeof(wchar_t)*(len+1));
- memset(buf, 0, sizeof(wchar_t) *(len+1));
- len =mbstowcs(buf,mbs,len+1);
- return buf;
- }
- char* ANSIToUTF8(const char* str)
- {
- return UnicodeToUTF8(ANSIToUnicode(str));
- }
- char* UTF8ToANSI(const char* str)
- {
- return UnicodeToANSI(UTF8ToUnicode(str));
- }
- int main()
- {
- /*使用wcstombs和mbstowcs之前必须调用setlocale,以便决定内码*/
- setlocale(LC_ALL,".936");
- /*假定有一个Unicode(UTF-16LE)编码的文件,将其打开,重新编码为ANSI
- ,写入aa.txt中,再继续编码回Unicode,写入aw.txt中*/
- /*如果不存在a.txt文件,则程序出错,没有做错误处理*/
- char* filename = "a.txt";
- char* filenamea = "aa.txt";
- char* filenamew = "aw.txt";
- FILE* input=fopen( filename, "rb");
- FILE* inputa=fopen( filenamea, "wb");
- FILE* inputw=fopen( filenamew, "wb");
- wchar_t * buf ;
- /*BOE设置,UTF-16LE的BOE为FEFF,如果不先将其读取出来,wcstombs会调用失败*/
- fgetwc(input);
- fputwc(0xFEFF,inputw);
- /*开始读取文件*/
- while(!feof(input))
- {
- buf = (wchar_t *)malloc(sizeof(wchar_t)*BUFF_SIZE) ;
- memset(buf, 0, sizeof(wchar_t) * BUFF_SIZE );
- fgetws(buf, BUFF_SIZE, input);
- fputs(w2m(buf), inputa);
- fputws(m2w(w2m(buf)), inputw);
- }
- /*后续处理*/
- fclose(input);
- fclose(inputa);
- fclose(inputw);
- free(buf);
- return 0;
- }
void ConvertGBKToUtf8(CString& strGBK) {
int len=MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)strGBK, -1, NULL,0);
unsigned short * wszUtf8 = new unsigned short[len+1];
memset(wszUtf8, 0, len * 2 + 2);
MultiByteToWideChar(CP_ACP, 0, (LPCTSTR)strGBK, -1, wszUtf8, len);
len = WideCharToMultiByte(CP_UTF8, 0, wszUtf8, -1, NULL, 0, NULL, NULL);
char *szUtf8=new char[len + 1];
memset(szUtf8, 0, len + 1);
WideCharToMultiByte (CP_UTF8, 0, wszUtf8, -1, szUtf8, len, NULL,NULL);
strGBK = szUtf8;
delete[] szUtf8;
delete[] wszUtf8;
}
void ConvertUtf8ToGBK(CString& strUtf8) {
int len=MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUtf8, -1, NULL,0);
unsigned short * wszGBK = new unsigned short[len+1];
memset(wszGBK, 0, len * 2 + 2);
MultiByteToWideChar(CP_UTF8, 0, (LPCTSTR)strUtf8, -1, wszGBK, len);
len = WideCharToMultiByte(CP_ACP, 0, wszGBK, -1, NULL, 0, NULL, NULL);
char *szGBK=new char[len + 1];
memset(szGBK, 0, len + 1);
WideCharToMultiByte (CP_ACP, 0, wszGBK, -1, szGBK, len, NULL,NULL);
strUtf8 = szGBK;
delete[] szGBK;
delete[] wszGBK;
}