iconv_open、iconv和iconv_close函數使用樣本

bool isUtf8(const char* str){    return ((0xEF == (unsigned char)(str[0]))          && (0xBB == (unsigned char)(str[1]))          && (0xBF == (unsigned char)(str[2])));}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;        cd = iconv_open(to_charset, from_charset);    if (0 == cd) return -1;    if (-1 == iconv(cd, pin, &inlen, pout, &outlen))

    {        int old_errno = errno;        iconv_close(cd);        errno = old_errno;        return -1;    }    iconv_close(cd);    return 0;}int toUtf8(char *inbuf, size_t inlen, char *outbuf, size_t outlen){    return code_convert("gb2312", "utf-8", inbuf, inlen, outbuf, outlen);}int toGB2312(char *inbuf, size_t inlen, char *outbuf, size_t outlen){    return code_convert("utf-8", "gb2312", inbuf, inlen, outbuf, outlen);}