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/*
* Copyright (C) 2025 Apple Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* THIS SOFTWARE IS PROVIDED BY APPLE INC. AND ITS CONTRIBUTORS ``AS IS''
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO,
* THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL APPLE INC. OR ITS CONTRIBUTORS
* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF
* THE POSSIBILITY OF SUCH DAMAGE.
*/
#include "config.h"
#include "FileHandle.h"
#include <wtf/FileSystem.h>
#include <wtf/MappedFileData.h>
namespace WTF::FileSystemImpl {
FileHandle::FileHandle() = default;
FileHandle::FileHandle(PlatformFileHandle handle, OptionSet<FileLockMode> lockMode)
: m_handle(handle)
{
#if USE(FILE_LOCK)
if (lockMode)
lock(lockMode);
#else
UNUSED_PARAM(lockMode);
#endif
}
FileHandle::FileHandle(FileHandle&& other)
: m_handle(std::exchange(other.m_handle, std::nullopt))
{ }
FileHandle::~FileHandle()
{
close();
}
FileHandle& FileHandle::operator=(FileHandle&& other)
{
close();
m_handle = std::exchange(other.m_handle, std::nullopt);
return *this;
}
std::optional<Vector<uint8_t>> FileHandle::readAll()
{
if (!isValid())
return { };
auto size = this->size().value_or(0);
if (!size)
return std::nullopt;
size_t bytesToRead;
if (!WTF::convertSafely(size, bytesToRead))
return std::nullopt;
Vector<uint8_t> buffer(bytesToRead);
size_t totalBytesRead = 0;
uint64_t bytesRead;
while ((bytesRead = read(buffer.mutableSpan().subspan(totalBytesRead)).value_or(0)))
totalBytesRead += bytesRead;
if (totalBytesRead != bytesToRead)
return std::nullopt;
return buffer;
}
bool FileHandle::appendFileContents(const String& path)
{
auto source = openFile(path, FileOpenMode::Read);
if (!source)
return false;
static size_t bufferSize = 1 << 19;
Vector<uint8_t> buffer(bufferSize);
do {
auto readBytes = source.read(buffer.mutableSpan());
if (!readBytes)
return false;
if (write(buffer.span().first(*readBytes)) != readBytes)
return false;
if (*readBytes < bufferSize)
return true;
} while (true);
ASSERT_NOT_REACHED();
}
std::optional<MappedFileData> FileHandle::map(MappedFileMode fileMode)
{
return map(fileMode, FileOpenMode::Read);
}
} // namespace WTF::FileSystemImpl
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