Function rt_memcmp

src/klibc/kstring.c:256–270

 */
#ifndef RT_KLIBC_USING_USER_MEMCMP
rt_int32_t rt_memcmp(const void *cs, const void *ct, rt_size_t count)
{
#ifdef RT_KLIBC_USING_LIBC_MEMCMP
    return memcmp(cs, ct, count);
#else
    const unsigned char *su1 = RT_NULL, *su2 = RT_NULL;
    int res = 0;

    for (su1 = (const unsigned char *)cs, su2 = (const unsigned char *)ct; 0 < count; ++su1, ++su2, count--)
        if ((res = *su1 - *su2) != 0)
            break;

    return res;
#endif /* RT_KLIBC_USING_LIBC_MEMCMP */
}
#endif /* RT_KLIBC_USING_USER_MEMCMP */
RTM_EXPORT(rt_memcmp);