32 lines · cpp
1//===-- Implementation of wcsrchr -----------------------------------------===//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/wcsrchr.h"10 11#include "hdr/types/wchar_t.h"12#include "src/__support/common.h"13#include "src/__support/macros/config.h"14#include "src/__support/macros/null_check.h"15 16namespace LIBC_NAMESPACE_DECL {17 18LLVM_LIBC_FUNCTION(const wchar_t *, wcsrchr, (const wchar_t *s, wchar_t c)) {19 LIBC_CRASH_ON_NULLPTR(s);20 21 const wchar_t *last_occurrence = nullptr;22 while (true) {23 if (*s == c)24 last_occurrence = s;25 if (*s == L'\0')26 return last_occurrence;27 ++s;28 }29}30 31} // namespace LIBC_NAMESPACE_DECL32