32 lines · cpp
1//===-- Implementation of wmemcmp -----------------------------------------===//2//3// Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions.4// See https://llvm.org/LICENSE.txt for license information.5// SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception6//7//===----------------------------------------------------------------------===//8 9#include "src/wchar/wmemcmp.h"10 11#include "hdr/types/size_t.h"12#include "hdr/types/wchar_t.h"13#include "src/__support/common.h"14#include "src/__support/macros/config.h"15#include "src/__support/macros/null_check.h" // LIBC_CRASH_ON_NULLPTR16 17namespace LIBC_NAMESPACE_DECL {18 19LLVM_LIBC_FUNCTION(int, wmemcmp,20 (const wchar_t *s1, const wchar_t *s2, size_t n)) {21 LIBC_CRASH_ON_NULLPTR(s1);22 LIBC_CRASH_ON_NULLPTR(s2);23 for (size_t i = 0; i < n; ++i) {24 if (s1[i] != s2[i])25 return (int)(s1[i] - s2[i]);26 }27 // If it reaches the end, all n values must be the same.28 return 0;29}30 31} // namespace LIBC_NAMESPACE_DECL32