Linux下UTF-8和GB2312互相转换的函数

#include<iconv.h> #include <stdio.h>

#include<iconv.h>
using namespace std;
int utf8togb2312(const char *sourcebuf,size_t sourcelen,char *destbuf,size_t destlen) {   

iconv_t cd;   

if( (cd = iconv_open("gb2312","utf-8")) ==0 )     

      return -1;  

memset(destbuf,0,destlen);   

const char **source = &sourcebuf;   

char **dest = &destbuf;
if(-1 == iconv(cd,source,&sourcelen,dest,&destlen))     

     return -1;   

iconv_close(cd);   

return 0;   

}
int gb2312toutf8(const char *sourcebuf,size_t sourcelen,char *destbuf,size_t destlen) {   

iconv_t cd;   if( (cd = iconv_open("utf-8","gb2312")) ==0 )     

return -1;   memset(destbuf,0,destlen);   

const char **source = &sourcebuf;   

char **dest = &destbuf;
  if(-1 == iconv(cd,source,&sourcelen,dest,&destlen))     

return -1;   

iconv_close(cd);   

return 0;   

}
int main() {  

char line[80];  

char dest_gb2312[200];  

char dest_utf8[200];  

int ret ;  

FILE *fp = fopen("love.txt","r");  

if(fp == NULL)    

{      

printf("oh my dear,open fail... ");      

return 1;    

}

  memset(line,0,80);  

if( NULL == fgets(line,80,fp))    

{      

printf("oh fgets fail... ");      

return 2;    

}

printf( "----- :%s ",line );

ret  = gb2312toutf8(line,strlen(line),dest_gb2312,200);  

// ret  = gb2312toutf8(dest_gb2312,strlen(dest_gb2312),dest_utf8,80);  

printf( "ret=%d ",ret);  

printf( "gb2312:%s ",line );  

printf( " utf-8:%s ", dest_gb2312 );

  ret  = utf8togb2312(dest_gb2312,strlen(dest_gb2312),dest_utf8,200);  

printf( "ret=%d ",ret);  

printf( " utf-8:%s ",dest_gb2312);  

printf( "gb2312:%s ",dest_utf8);

    return 0;

}