folly/folly/lang/CString.cpp

/*
 * Copyright (c) Meta Platforms, Inc. and affiliates.
 *
 * Licensed under the Apache License, Version 2.0 (the "License");
 * you may not use this file except in compliance with the License.
 * You may obtain a copy of the License at
 *
 *     http://www.apache.org/licenses/LICENSE-2.0
 *
 * Unless required by applicable law or agreed to in writing, software
 * distributed under the License is distributed on an "AS IS" BASIS,
 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
 * See the License for the specific language governing permissions and
 * limitations under the License.
 */

#include <folly/lang/CString.h>

#include <algorithm>
#include <cstring>
#include <type_traits>

#include <folly/CppAttributes.h>
#include <folly/functional/Invoke.h>

namespace {

struct poison { … };

[[maybe_unused]] FOLLY_ERASE void memrchr(poison) noexcept { … }

} // namespace

namespace folly {

namespace detail {

void* memrchr_fallback(void* s, int c, std::size_t len) noexcept { … }

void const* memrchr_fallback(void const* s, int c, std::size_t len) noexcept { … }

namespace {

FOLLY_CREATE_QUAL_INVOKER(invoke_primary_memrchr_fn, ::memrchr);
FOLLY_CREATE_QUAL_INVOKER(invoke_fallback_memrchr_fn, memrchr_fallback);

invoke_memrchr_fn;
constexpr invoke_memrchr_fn invoke_memrchr{ … };

} // namespace

} // namespace detail

void* memrchr(void* s, int c, std::size_t len) noexcept { … }
void const* memrchr(void const* s, int c, std::size_t len) noexcept { … }

std::size_t strlcpy(
    char* const dest, char const* const src, std::size_t const size) { … }

} // namespace folly