libopenraw
streamclone.hpp
1/* -*- Mode: C++ -*- */
2/*
3 * libopenraw - streamclone.h
4 *
5 * Copyright (C) 2006-2016 Hubert Figuière
6 *
7 * This library is free software: you can redistribute it and/or
8 * modify it under the terms of the GNU Lesser General Public License
9 * as published by the Free Software Foundation, either version 3 of
10 * the License, or (at your option) any later version.
11 *
12 * This library is distributed in the hope that it will be useful,
13 * but WITHOUT ANY WARRANTY; without even the implied warranty of
14 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
15 * Lesser General Public License for more details.
16 *
17 * You should have received a copy of the GNU Lesser General Public
18 * License along with this library. If not, see
19 * <http://www.gnu.org/licenses/>.
20 */
21
22
23#ifndef OR_INTERNALS_IO_STREAMCLONE_H_
24#define OR_INTERNALS_IO_STREAMCLONE_H_
25
26#include <stddef.h>
27#include <sys/types.h>
28
29#include "stream.hpp"
30
31namespace OpenRaw {
32namespace IO {
33
37 : public Stream
38{
39public:
40 StreamClone(const Stream::Ptr &clone, off_t offset);
41 virtual ~StreamClone();
42
43 StreamClone(const StreamClone& f) = delete;
44 StreamClone & operator=(const StreamClone&) = delete;
45
46 virtual Error open() override;
47 virtual int close() override;
48 virtual int seek(off_t offset, int whence) override;
49 virtual int read(void *buf, size_t count) override;
50 virtual off_t filesize() override;
51
52private:
53
54 Stream::Ptr m_cloned;
55 off_t m_offset;
56};
57
58}
59}
60
61#endif
cloned stream. Allow reading from a different offset
Definition: streamclone.hpp:38
virtual Error open() override
Definition: streamclone.cpp:48
virtual int read(void *buf, size_t count) override
Definition: streamclone.cpp:83
virtual int close() override
Definition: streamclone.cpp:61
virtual int seek(off_t offset, int whence) override
Definition: streamclone.cpp:68
base virtual class for IO
Definition: stream.hpp:42
CIFF is the container for CRW files. It is an attempt from Canon to make this a standard....
Definition: arwfile.cpp:30