iodevice_provider.h
1 /*
2 ** ClanLib SDK
3 ** Copyright (c) 1997-2016 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 #pragma once
30 
31 #include "iodevice.h"
32 
33 namespace clan
34 {
37 
40  {
41  public:
42  virtual ~IODeviceProvider() { return; }
43 
45 
46  virtual int get_size() const { return -1; }
47 
49 
50  virtual int get_position() const { return -1; }
51 
53  virtual int send(const void *data, int len, bool send_all = true) = 0;
54 
56  virtual int receive(void *data, int len, bool receive_all = true) = 0;
57 
59  virtual int peek(void *data, int len) = 0;
60 
62  virtual IODeviceProvider *duplicate() = 0;
63 
65  virtual bool seek(int /*position*/, IODevice::SeekMode /*mode*/) { return false; }
66  };
67 
69 }
Definition: clanapp.h:35
virtual int send(const void *data, int len, bool send_all=true)=0
Send data to device.
virtual ~IODeviceProvider()
Definition: iodevice_provider.h:42
virtual int get_position() const
Returns the position in the data stream.
Definition: iodevice_provider.h:50
virtual int receive(void *data, int len, bool receive_all=true)=0
Receive data from device.
I/O device provider interface.
Definition: iodevice_provider.h:39
virtual bool seek(int, IODevice::SeekMode)
Seek in data stream.
Definition: iodevice_provider.h:65
SeekMode
Seeking modes.
Definition: iodevice.h:53
virtual int peek(void *data, int len)=0
Peek data from device.
virtual IODeviceProvider * duplicate()=0
Returns a new provider to the same resource.
virtual int get_size() const
Returns the size of data stream.
Definition: iodevice_provider.h:46