1 //===-- Implementation of strrchr------------------------------------------===//
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 #include "src/string/strrchr.h"
10 
11 #include "src/__support/common.h"
12 
13 namespace __llvm_libc {
14 
15 char *LLVM_LIBC_ENTRYPOINT(strrchr)(const char *src, int c) {
16   unsigned char *str =
17       const_cast<unsigned char *>(reinterpret_cast<const unsigned char *>(src));
18   const unsigned char ch = c;
19 
20   unsigned char *last_occurrence = nullptr;
21   do {
22     if (*str == ch)
23       last_occurrence = str;
24   } while (*str++);
25   return reinterpret_cast<char *>(last_occurrence);
26 }
27 
28 } // namespace __llvm_libc
29