字符編碼 utf-8 與 gb2312之間的轉換 C 實現

字符編碼查詢 漢字字符集編碼查詢

設備之間的收發端使用的gb2312, 比如“早”字編碼爲（D4E7）， 而網絡下載的txt文件的編碼爲utf-8
爲了比較這兩類文件，需要轉化到統一的編碼，這裏將 utf-8轉化爲gb2312

C 實現

//代碼轉換:從一種編碼轉爲另一種編碼   
static int   code_convert(char * from_charset, char * to_charset, char * inbuf, size_t inlen, char * outbuf, size_t outlen)   
{   
    iconv_t   cd;   
    char **pin   =   &inbuf;   
    char **pout   =   &outbuf;   
    int ret ;

    cd   =   iconv_open(to_charset, from_charset);   

    if(cd == (iconv_t)-1)   
    {
        perror("open iconv_open failed");
        return   -1;
    }
    memset(outbuf,0,outlen); 
    ret = iconv(cd, (char **)pin, &inlen, (char **)pout, &outlen);

    if( ret < 0)   
    {
        perror("iconv  failed"); 
        iconv_close(cd); /*by zyy*/
        return   -1;
    }
    iconv_close(cd);   
    return   0;   
} 

/*UTF-8 碼轉爲GB2312碼*/   
static int   u2g(char  *inbuf, size_t   inlen, char  *outbuf, size_t   outlen)   
{   
    int ret;
    ret =code_convert("UTF-8","GBK//IGNORE",inbuf,inlen,outbuf,outlen);   
    return ret;
}