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/*
* This source file is part of libRocket, the HTML/CSS Interface Middleware
*
* For the latest information, see http://www.librocket.com
*
* Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*
*/
#ifndef ROCKETCORESTREAMMEMORY_H
#define ROCKETCORESTREAMMEMORY_H
#include "Header.h"
#include "Stream.h"
namespace Rocket {
namespace Core {
/**
Memory Byte Stream Class
@author Lloyd Weehuizen
*/
class ROCKETCORE_API StreamMemory : public Stream
{
public:
/// Empty memory stream with default size buffer
StreamMemory();
/// Empty memory stream with specified buffer size
StreamMemory(size_t initial_size);
/// Read only memory stream based on the existing buffer
StreamMemory(const byte* buffer, size_t buffer_size);
/// Copy a memory stream
StreamMemory(const StreamMemory& copy);
virtual ~StreamMemory();
StreamMemory& operator=(const StreamMemory& copy);
/// Close the stream
virtual void Close();
/// Are we at the end of the stream
virtual bool IsEOS() const;
/// Size of this stream ( in bytes )
virtual size_t Length() const;
/// Get Stream position ( in bytes )
size_t Tell() const;
/// Set Stream position ( in bytes )
bool Seek(long offset, int origin) const;
/// Read from the stream
using Stream::Read;
virtual size_t Read(void* buffer, size_t bytes) const;
/// Peek into the stream
virtual size_t Peek(void *buffer, size_t bytes) const;
/// Write to the stream
using Stream::Write;
virtual size_t Write(const void* buffer, size_t bytes);
/// Truncate the stream to the specified length
virtual size_t Truncate(size_t bytes);
/// Push onto the front of the stream
virtual size_t PushFront(const void* buffer, size_t bytes);
/// Pop from the front of the stream
virtual size_t PopFront(size_t bytes);
/// Raw access to the stream
const byte* RawStream() const;
/// Erase a section of the stream
void Erase(size_t offset, size_t bytes);
/// Does the stream have data available for reading
virtual bool IsReadReady();
/// Is the stream able to accept data now
virtual bool IsWriteReady();
/// Sets this streams source URL, useful data that is stored
/// in memory streams that originated from files
void SetSourceURL(const URL& url);
private:
byte* buffer;
mutable byte* buffer_ptr;
size_t buffer_size;
size_t buffer_used;
bool owns_buffer;
bool Reallocate(size_t size);
};
}
}
#endif
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