timingsafe_bcmp.c

/*-*- mode:c;indent-tabs-mode:nil;c-basic-offset:2;tab-width:8;coding:utf-8 -*-│
│ vi: set et ft=c ts=2 sts=2 sw=2 fenc=utf-8                               :vi │
╞══════════════════════════════════════════════════════════════════════════════╡
│ Copyright 2021 Justine Alexandra Roberts Tunney                              │
│                                                                              │
│ Permission to use, copy, modify, and/or distribute this software for         │
│ any purpose with or without fee is hereby granted, provided that the         │
│ above copyright notice and this permission notice appear in all copies.      │
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│ PERFORMANCE OF THIS SOFTWARE.                                                │
╚─────────────────────────────────────────────────────────────────────────────*/
#include "libc/str/str.h"

/**
 * Tests inequality of first 𝑛 bytes of 𝑝 and 𝑞.
 *
 * @return nonzero if unequal, otherwise zero
 * @see timingsafe_memcmp()
 * @asyncsignalsafe
 */
int timingsafe_bcmp(const void *a, const void *b, size_t n) {
  return timingsafe_memcmp(a, b, n);
}