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/*
* Copyright (c) 2020, the SerenityOS developers.
*
* SPDX-License-Identifier: BSD-2-Clause
*/
#pragma once
#include <AK/Buffered.h>
#include <AK/ByteBuffer.h>
#include <AK/Stream.h>
#include <LibCore/File.h>
namespace Core {
class InputFileStream final : public InputStream {
public:
explicit InputFileStream(NonnullRefPtr<File> file)
: m_file(file)
{
}
static Result<InputFileStream, String> open(StringView filename, OpenMode mode = OpenMode::ReadOnly, mode_t permissions = 0644)
{
VERIFY(has_flag(mode, OpenMode::ReadOnly));
auto file_result = File::open(filename, mode, permissions);
if (file_result.is_error())
return file_result.error();
return InputFileStream { file_result.value() };
}
static Result<Buffered<InputFileStream>, String> open_buffered(StringView filename, OpenMode mode = OpenMode::ReadOnly, mode_t permissions = 0644)
{
VERIFY(has_flag(mode, OpenMode::ReadOnly));
auto file_result = File::open(filename, mode, permissions);
if (file_result.is_error())
return file_result.error();
return Buffered<InputFileStream> { file_result.value() };
}
size_t read(Bytes bytes) override
{
if (has_any_error())
return 0;
const auto buffer = m_file->read(bytes.size());
return buffer.bytes().copy_to(bytes);
}
bool read_or_error(Bytes bytes) override
{
if (read(bytes) < bytes.size()) {
set_fatal_error();
return false;
}
return true;
}
bool discard_or_error(size_t count) override { return m_file->seek(count, SeekMode::FromCurrentPosition); }
bool unreliable_eof() const override { return m_file->eof(); }
void close()
{
if (!m_file->close())
set_fatal_error();
}
private:
NonnullRefPtr<File> m_file;
};
class OutputFileStream : public OutputStream {
public:
explicit OutputFileStream(NonnullRefPtr<File> file)
: m_file(file)
{
}
static Result<OutputFileStream, String> open(StringView filename, OpenMode mode = OpenMode::WriteOnly, mode_t permissions = 0644)
{
VERIFY(has_flag(mode, OpenMode::WriteOnly));
auto file_result = File::open(filename, mode, permissions);
if (file_result.is_error())
return file_result.error();
return OutputFileStream { file_result.value() };
}
static Result<Buffered<OutputFileStream>, String> open_buffered(StringView filename, OpenMode mode = OpenMode::WriteOnly, mode_t permissions = 0644)
{
VERIFY(has_flag(mode, OpenMode::WriteOnly));
auto file_result = File::open(filename, mode, permissions);
if (file_result.is_error())
return file_result.error();
return Buffered<OutputFileStream> { file_result.value() };
}
static OutputFileStream standard_output()
{
return OutputFileStream { Core::File::standard_output() };
}
static Buffered<OutputFileStream> stdout_buffered()
{
return Buffered<OutputFileStream> { Core::File::standard_output() };
}
size_t write(ReadonlyBytes bytes) override
{
if (!m_file->write(bytes.data(), bytes.size())) {
set_fatal_error();
return 0;
}
return bytes.size();
}
bool write_or_error(ReadonlyBytes bytes) override
{
if (write(bytes) < bytes.size()) {
set_fatal_error();
return false;
}
return true;
}
void close()
{
if (!m_file->close())
set_fatal_error();
}
private:
NonnullRefPtr<File> m_file;
};
}
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