StreamMemory.h

00001 /*
00002  * This source file is part of libRocket, the HTML/CSS Interface Middleware
00003  *
00004  * For the latest information, see http://www.librocket.com
00005  *
00006  * Copyright (c) 2008-2010 CodePoint Ltd, Shift Technology Ltd
00007  *
00008  * Permission is hereby granted, free of charge, to any person obtaining a copy
00009  * of this software and associated documentation files (the "Software"), to deal
00010  * in the Software without restriction, including without limitation the rights
00011  * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
00012  * copies of the Software, and to permit persons to whom the Software is
00013  * furnished to do so, subject to the following conditions:
00014  *
00015  * The above copyright notice and this permission notice shall be included in
00016  * all copies or substantial portions of the Software.
00017  * 
00018  * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
00019  * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
00020  * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
00021  * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
00022  * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
00023  * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
00024  * THE SOFTWARE.
00025  *
00026  */
00027 
00028 #ifndef ROCKETCORESTREAMMEMORY_H
00029 #define ROCKETCORESTREAMMEMORY_H
00030 
00031 #include <Rocket/Core/Header.h>
00032 #include <Rocket/Core/Stream.h>
00033 
00034 namespace Rocket {
00035 namespace Core {
00036 
00042 class ROCKETCORE_API StreamMemory : public Stream
00043 {
00044 public:
00046         StreamMemory();
00048         StreamMemory(size_t initial_size);
00050         StreamMemory(const byte* buffer, size_t buffer_size);
00052         StreamMemory(const StreamMemory& copy); 
00053         virtual ~StreamMemory();
00054 
00055         StreamMemory& operator=(const StreamMemory& copy);
00056 
00058         virtual void Close();   
00059 
00061         virtual bool IsEOS() const;
00062 
00064         virtual size_t Length() const;
00065 
00067         size_t Tell() const;
00068 
00070         bool Seek(long offset, int origin) const;
00071 
00073         using Stream::Read;
00074         virtual size_t Read(void* buffer, size_t bytes) const;
00075 
00077         virtual size_t Peek(void *buffer, size_t bytes); 
00078 
00080         using Stream::Write;
00081         virtual size_t Write(const void* buffer, size_t bytes);
00082 
00084         virtual size_t Truncate(size_t bytes);
00085 
00087         virtual size_t PushFront(const void* buffer, size_t bytes);
00088 
00090         virtual size_t PopFront(size_t bytes);
00091 
00093         const byte* RawStream() const;
00094 
00096         void Erase(size_t offset, size_t bytes);
00097 
00099         virtual bool IsReadReady();
00100 
00102         virtual bool IsWriteReady();
00103 
00106         void SetSourceURL(const URL& url);
00107 
00108 private:
00109 
00110         byte* buffer;
00111         mutable byte* buffer_ptr;
00112         size_t buffer_size;
00113         size_t buffer_used;
00114         bool owns_buffer;
00115         
00116         bool Reallocate(size_t size);
00117 };
00118 
00119 }
00120 }
00121 
00122 #endif