1//===-- str{,case}cmp implementation ----------------------------*- C++ -*-===//
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-exception
6//
7//===----------------------------------------------------------------------===//
8
9#ifndef LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H
10#define LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H
11
12#include <stddef.h>
13
14namespace LIBC_NAMESPACE {
15
16template <typename Comp>
17LIBC_INLINE constexpr int inline_strcmp(const char *left, const char *right,
18 Comp &&comp) {
19 // TODO: Look at benefits for comparing words at a time.
20 for (; *left && !comp(*left, *right); ++left, ++right)
21 ;
22 return comp(*reinterpret_cast<const unsigned char *>(left),
23 *reinterpret_cast<const unsigned char *>(right));
24}
25
26template <typename Comp>
27LIBC_INLINE constexpr int inline_strncmp(const char *left, const char *right,
28 size_t n, Comp &&comp) {
29 if (n == 0)
30 return 0;
31
32 // TODO: Look at benefits for comparing words at a time.
33 for (; n > 1; --n, ++left, ++right) {
34 char lc = *left;
35 if (!comp(lc, '\0') || comp(lc, *right))
36 break;
37 }
38 return comp(*reinterpret_cast<const unsigned char *>(left),
39 *reinterpret_cast<const unsigned char *>(right));
40}
41
42} // namespace LIBC_NAMESPACE
43
44#endif // LLVM_LIBC_SRC_STRING_MEMORY_UTILS_INLINE_STRCMP_H
45

source code of libc/src/string/memory_utils/inline_strcmp.h