字符串处理 - ANSI - Unicode - UTF8 转换
[C语言]字符串处理 - ANSI - Unicode - UTF8 转换 -11-4: 使用MultiByteToWideChar和WideCharToMultiByte写的4个ANSI <-> Unicode <-> UTF-8 相互转换的函数。
-11-5: 使用C语言标准库mbstowcs和wcstombs写的w2m和m2w两个函数，分别对应ANSI <-> Unicode 相互转换。
-11-8: 包装一下 ANSI <-> UTF-8 。 #include <stdio.h>
#include <windows.h>
#include <locale.h>
#define BUFF_SIZE 1024
wchar_t* ANSIToUnicode(constchar* str )
{
inttextlen ;
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 );
returnresult;
}
char* UnicodeToANSI(constwchar_t* str )
{
char* result;
inttextlen;
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 );
returnresult;
}
wchar_t* UTF8ToUnicode(constchar* str )
{
inttextlen ;
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 );
returnresult;
}
char* UnicodeToUTF8(constwchar_t* str )
{
char* result;
inttextlen;
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 );
returnresult;
}
/*宽字符转换为多字符Unicode - ANSI*/
char* w2m(constwchar_t* wcs)
{
intlen;
char* buf;
len =wcstombs(NULL,wcs,0);
if(len ==0)
returnNULL;
buf = (char*)malloc(sizeof(char)*(len+1));
memset(buf,0,sizeof(char) *(len+1));
len =wcstombs(buf,wcs,len+1);
returnbuf;
}
/*多字符转换为宽字符ANSI - Unicode*/
wchar_t* m2w(constchar* mbs)
{
intlen;
wchar_t* buf;
len =mbstowcs(NULL,mbs,0);
if(len ==0)
returnNULL;
buf = (wchar_t*)malloc(sizeof(wchar_t)*(len+1));
memset(buf,0,sizeof(wchar_t) *(len+1));
len =mbstowcs(buf,mbs,len+1);
returnbuf;
}
char* ANSIToUTF8(constchar* str)
{
returnUnicodeToUTF8(ANSIToUnicode(str));
}
char* UTF8ToANSI(constchar* str)
{
returnUnicodeToANSI(UTF8ToUnicode(str));
}
intmain()
{
/*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);
return0;
} 来自:/end/blog/item/9ff286df5d57bc53cdbf1ab9.html
