| //===-- Implementation of memrchr -----------------------------------------===// |
| // |
| // Part of the LLVM Project, under the Apache License v2.0 with LLVM Exceptions. |
| // See https://llvm.org/LICENSE.txt for license information. |
| // SPDX-License-Identifier: Apache-2.0 WITH LLVM-exception |
| // |
| //===----------------------------------------------------------------------===// |
| |
| #include "src/string/memrchr.h" |
| #include "src/__support/common.h" |
| #include <stddef.h> |
| |
| namespace __llvm_libc { |
| |
| LLVM_LIBC_FUNCTION(void *, memrchr, (const void *src, int c, size_t n)) { |
| const unsigned char *str = reinterpret_cast<const unsigned char *>(src); |
| const unsigned char ch = c; |
| for (; n != 0; --n) { |
| const unsigned char *s = str + n - 1; |
| if (*s == ch) |
| return const_cast<unsigned char *>(s); |
| } |
| return nullptr; |
| } |
| |
| } // namespace __llvm_libc |
