iconv_open、iconv和iconv_close函數使用示例

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);