iodevice_provider.h

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00001 /*
00002 **  ClanLib SDK
00003 **  Copyright (c) 1997-2011 The ClanLib Team
00004 **
00005 **  This software is provided 'as-is', without any express or implied
00006 **  warranty.  In no event will the authors be held liable for any damages
00007 **  arising from the use of this software.
00008 **
00009 **  Permission is granted to anyone to use this software for any purpose,
00010 **  including commercial applications, and to alter it and redistribute it
00011 **  freely, subject to the following restrictions:
00012 **
00013 **  1. The origin of this software must not be misrepresented; you must not
00014 **     claim that you wrote the original software. If you use this software
00015 **     in a product, an acknowledgment in the product documentation would be
00016 **     appreciated but is not required.
00017 **  2. Altered source versions must be plainly marked as such, and must not be
00018 **     misrepresented as being the original software.
00019 **  3. This notice may not be removed or altered from any source distribution.
00020 **
00021 **  Note: Some of the libraries ClanLib may link to may have additional
00022 **  requirements or restrictions.
00023 **
00024 **  File Author(s):
00025 **
00026 **    Magnus Norddahl
00027 */
00028 
00031 
00032 #pragma once
00033 
00034 #include "../api_core.h"
00035 #include "iodevice.h"
00036 
00040 class CL_API_CORE CL_IODeviceProvider
00041 {
00044 
00045 public:
00046         virtual ~CL_IODeviceProvider() { return; }
00047 
00051 
00052 public:
00054 
00055         virtual int get_size() const { return -1; }
00056 
00058 
00059         virtual int get_position() const { return -1; }
00060 
00064 
00065 public:
00067         virtual int send(const void *data, int len, bool send_all = true) = 0;
00068 
00070         virtual int receive(void *data, int len, bool receive_all = true) = 0;
00071 
00073         virtual int peek(void *data, int len) = 0;
00074 
00076         virtual CL_IODeviceProvider *duplicate() = 0;
00077 
00079         virtual bool seek(int position, CL_IODevice::SeekMode mode) { return false; }
00080 
00084 
00085 private:
00087 };
00088