zero_copy_stream_impl.cc | Explore in Territory

// Protocol Buffers - Google's data interchange format
// Copyright 2008 Google Inc.  All rights reserved.
// https://developers.google.com/protocol-buffers/
//
// Redistribution and use in source and binary forms, with or without
// modification, are permitted provided that the following conditions are
// met:
//
//     * Redistributions of source code must retain the above copyright
// notice, this list of conditions and the following disclaimer.
//     * 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.
//     * Neither the name of Google Inc. nor the names of its
// contributors may be used to endorse or promote products derived from
// this software without specific prior written permission.
//
// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND 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 THE COPYRIGHT
// OWNER OR 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.

// Author: [email protected] (Kenton Varda)
//  Based on original Protocol Buffers design by
//  Sanjay Ghemawat, Jeff Dean, and others.

#ifndef _MSC_VER
#include <fcntl.h>
#include <sys/stat.h>
#include <sys/types.h>
#include <unistd.h>
#endif
#include <errno.h>

#include <algorithm>
#include <iostream>

#include <google/protobuf/stubs/common.h>
#include <google/protobuf/stubs/logging.h>
#include <google/protobuf/io/io_win32.h>
#include <google/protobuf/io/zero_copy_stream_impl.h>
#include <google/protobuf/stubs/stl_util.h>


namespace google {
namespace protobuf {
namespace io {

#ifdef _WIN32
// Win32 lseek is broken:  If invoked on a non-seekable file descriptor, its
// return value is undefined.  We re-define it to always produce an error.
#define lseek …
// DO NOT include <io.h>, instead create functions in io_win32.{h,cc} and import
// them like we do below.
using google::protobuf::io::win32::access;
using google::protobuf::io::win32::close;
using google::protobuf::io::win32::open;
using google::protobuf::io::win32::read;
using google::protobuf::io::win32::write;
#endif

namespace {

// EINTR sucks.
int close_no_eintr(int fd) { … }

}  // namespace

// ===================================================================

FileInputStream::FileInputStream(int file_descriptor, int block_size)
    : … { … }

bool FileInputStream::Close() { … }

bool FileInputStream::Next(const void** data, int* size) { … }

void FileInputStream::BackUp(int count) { … }

bool FileInputStream::Skip(int count) { … }

int64_t FileInputStream::ByteCount() const { … }

FileInputStream::CopyingFileInputStream::CopyingFileInputStream(
    int file_descriptor)
    : … { … }

FileInputStream::CopyingFileInputStream::~CopyingFileInputStream() { … }

bool FileInputStream::CopyingFileInputStream::Close() { … }

int FileInputStream::CopyingFileInputStream::Read(void* buffer, int size) { … }

int FileInputStream::CopyingFileInputStream::Skip(int count) { … }

// ===================================================================

FileOutputStream::FileOutputStream(int file_descriptor, int /*block_size*/)
    : … { … }

bool FileOutputStream::Close() { … }

FileOutputStream::CopyingFileOutputStream::CopyingFileOutputStream(
    int file_descriptor)
    : … { … }

FileOutputStream::~FileOutputStream() { … }

FileOutputStream::CopyingFileOutputStream::~CopyingFileOutputStream() { … }

bool FileOutputStream::CopyingFileOutputStream::Close() { … }

bool FileOutputStream::CopyingFileOutputStream::Write(const void* buffer,
                                                      int size) { … }

// ===================================================================

IstreamInputStream::IstreamInputStream(std::istream* input, int block_size)
    : … { … }

bool IstreamInputStream::Next(const void** data, int* size) { … }

void IstreamInputStream::BackUp(int count) { … }

bool IstreamInputStream::Skip(int count) { … }

int64_t IstreamInputStream::ByteCount() const { … }

IstreamInputStream::CopyingIstreamInputStream::CopyingIstreamInputStream(
    std::istream* input)
    : … { … }

IstreamInputStream::CopyingIstreamInputStream::~CopyingIstreamInputStream() { … }

int IstreamInputStream::CopyingIstreamInputStream::Read(void* buffer,
                                                        int size) { … }

// ===================================================================

OstreamOutputStream::OstreamOutputStream(std::ostream* output, int block_size)
    : … { … }

OstreamOutputStream::~OstreamOutputStream() { … }

bool OstreamOutputStream::Next(void** data, int* size) { … }

void OstreamOutputStream::BackUp(int count) { … }

int64_t OstreamOutputStream::ByteCount() const { … }

OstreamOutputStream::CopyingOstreamOutputStream::CopyingOstreamOutputStream(
    std::ostream* output)
    : … { … }

OstreamOutputStream::CopyingOstreamOutputStream::~CopyingOstreamOutputStream() { … }

bool OstreamOutputStream::CopyingOstreamOutputStream::Write(const void* buffer,
                                                            int size) { … }

// ===================================================================

ConcatenatingInputStream::ConcatenatingInputStream(
    ZeroCopyInputStream* const streams[], int count)
    : … { … }

bool ConcatenatingInputStream::Next(const void** data, int* size) { … }

void ConcatenatingInputStream::BackUp(int count) { … }

bool ConcatenatingInputStream::Skip(int count) { … }

int64_t ConcatenatingInputStream::ByteCount() const { … }


// ===================================================================

}  // namespace io
}  // namespace protobuf
}  // namespace google
chromium/third_party/protobuf/src/google/protobuf/io/zero_copy_stream_impl.cc
