iodevice_provider.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2013 The ClanLib Team
4 **
5 ** This software is provided 'as-is', without any express or implied
6 ** warranty. In no event will the authors be held liable for any damages
7 ** arising from the use of this software.
8 **
9 ** Permission is granted to anyone to use this software for any purpose,
10 ** including commercial applications, and to alter it and redistribute it
11 ** freely, subject to the following restrictions:
12 **
13 ** 1. The origin of this software must not be misrepresented; you must not
14 ** claim that you wrote the original software. If you use this software
15 ** in a product, an acknowledgment in the product documentation would be
16 ** appreciated but is not required.
17 ** 2. Altered source versions must be plainly marked as such, and must not be
18 ** misrepresented as being the original software.
19 ** 3. This notice may not be removed or altered from any source distribution.
20 **
21 ** Note: Some of the libraries ClanLib may link to may have additional
22 ** requirements or restrictions.
23 **
24 ** File Author(s):
25 **
26 ** Magnus Norddahl
27 */
28 
29 
30 #pragma once
31 
32 #include "../api_core.h"
33 #include "iodevice.h"
34 
35 namespace clan
36 {
39 
41 class CL_API_CORE IODeviceProvider
42 {
45 
46 public:
47  virtual ~IODeviceProvider() { return; }
48 
52 
53 public:
55 
56  virtual int get_size() const { return -1; }
57 
59 
60  virtual int get_position() const { return -1; }
61 
65 
66 public:
68  virtual int send(const void *data, int len, bool send_all = true) = 0;
69 
71  virtual int receive(void *data, int len, bool receive_all = true) = 0;
72 
74  virtual int peek(void *data, int len) = 0;
75 
77  virtual IODeviceProvider *duplicate() = 0;
78 
80  virtual bool seek(int /*position*/, IODevice::SeekMode /*mode*/) { return false; }
81 
85 
86 private:
88 };
89 
90 }
91 
virtual int get_position() const
Returns the position in the data stream.
Definition: iodevice_provider.h:60
virtual bool seek(int, IODevice::SeekMode)
Seek in data stream.
Definition: iodevice_provider.h:80
virtual int get_size() const
Returns the size of data stream.
Definition: iodevice_provider.h:56
I/O device provider interface.
Definition: iodevice_provider.h:41
virtual ~IODeviceProvider()
Definition: iodevice_provider.h:47
SeekMode
Seeking modes.
Definition: iodevice.h:58