cef/libcef/stream_impl.h

// Copyright (c) 2008 The Chromium Embedded Framework Authors. All rights
// reserved. Use of this source code is governed by a BSD-style license that
// can be found in the LICENSE file.

#ifndef _STREAM_IMPL_H
#define _STREAM_IMPL_H

#include "include/cef_stream.h"
#include <stdio.h>

// Implementation of CefStreamReader for files.
class CefFileReader : public CefStreamReader
{
public:
  CefFileReader(FILE* file, bool close);
  virtual ~CefFileReader();

  virtual size_t Read(void* ptr, size_t size, size_t n) OVERRIDE;
  virtual int Seek(long offset, int whence) OVERRIDE;
  virtual long Tell() OVERRIDE;
  virtual int Eof() OVERRIDE;
	
protected:
  bool close_;
  FILE *file_;

  IMPLEMENT_REFCOUNTING(CefFileReader);
  IMPLEMENT_LOCKING(CefFileReader);
};

// Implementation of CefStreamWriter for files.
class CefFileWriter : public CefStreamWriter
{
public:
  CefFileWriter(FILE* file, bool close);
  virtual ~CefFileWriter();

  virtual size_t Write(const void* ptr, size_t size, size_t n) OVERRIDE;
  virtual int Seek(long offset, int whence) OVERRIDE;
  virtual long Tell() OVERRIDE;
  virtual int Flush() OVERRIDE;
	
protected:
  FILE *file_;
  bool close_;

  IMPLEMENT_REFCOUNTING(CefFileWriter);
  IMPLEMENT_LOCKING(CefFileWriter);
};

// Implementation of CefStreamReader for byte buffers.
class CefBytesReader : public CefStreamReader
{
public:
  CefBytesReader(void* data, long datasize, bool copy);
  virtual ~CefBytesReader();

  virtual size_t Read(void* ptr, size_t size, size_t n) OVERRIDE;
  virtual int Seek(long offset, int whence) OVERRIDE;
  virtual long Tell() OVERRIDE;
  virtual int Eof() OVERRIDE;
	
  void SetData(void* data, long datasize, bool copy);

  void* GetData() { return data_; }
  size_t GetDataSize() { return offset_; }

protected:
	void* data_;
	size_t datasize_;
  bool copy_;
	size_t offset_;

  IMPLEMENT_REFCOUNTING(CefBytesReader);
  IMPLEMENT_LOCKING(CefBytesReader);
};

// Implementation of CefStreamWriter for byte buffers.
class CefBytesWriter : public CefStreamWriter
{
public:
  CefBytesWriter(size_t grow);
  virtual ~CefBytesWriter();

  virtual size_t Write(const void* ptr, size_t size, size_t n) OVERRIDE;
  virtual int Seek(long offset, int whence) OVERRIDE;
  virtual long Tell() OVERRIDE;
  virtual int Flush() OVERRIDE;

  void* GetData() { return data_; }
	size_t GetDataSize() { return offset_; }
  std::string GetDataString();
	
protected:
	size_t Grow(size_t size);

  size_t grow_;
  void* data_;
  size_t datasize_;
  size_t offset_;

  IMPLEMENT_REFCOUNTING(CefBytesWriter);
  IMPLEMENT_LOCKING(CefBytesWriter);
};

// Implementation of CefStreamReader for handlers.
class CefHandlerReader : public CefStreamReader
{
public:
  CefHandlerReader(CefRefPtr<CefReadHandler> handler) : handler_(handler) {}

  virtual size_t Read(void* ptr, size_t size, size_t n) OVERRIDE
  {
    return handler_->Read(ptr, size, n);
  }
  virtual int Seek(long offset, int whence) OVERRIDE
  {
    return handler_->Seek(offset, whence);
  }
  virtual long Tell() OVERRIDE
  {
    return handler_->Tell();
  }
  virtual int Eof() OVERRIDE
  {
    return handler_->Eof();
  }
	
protected:
  CefRefPtr<CefReadHandler> handler_;

  IMPLEMENT_REFCOUNTING(CefHandlerReader);
};

// Implementation of CefStreamWriter for handlers.
class CefHandlerWriter : public CefStreamWriter
{
public:
  CefHandlerWriter(CefRefPtr<CefWriteHandler> handler) : handler_(handler) {}

  virtual size_t Write(const void* ptr, size_t size, size_t n) OVERRIDE
  {
    return handler_->Write(ptr, size, n);
  }
  virtual int Seek(long offset, int whence) OVERRIDE
  {
    return handler_->Seek(offset, whence);
  }
  virtual long Tell() OVERRIDE
  {
    return handler_->Tell();
  }
  virtual int Flush() OVERRIDE
  {
    return handler_->Flush();
  }
	
protected:
  CefRefPtr<CefWriteHandler> handler_;

  IMPLEMENT_REFCOUNTING(CefHandlerWriter);
};

#endif // _STREAM_IMPL_H