1 ///////////////////////////////////////////////////////////////////////////
2 //
3 // Copyright (c) 2011, Industrial Light & Magic, a division of Lucas
4 // Digital Ltd. LLC
5 //
6 // All rights reserved.
7 //
8 // Redistribution and use in source and binary forms, with or without
9 // modification, are permitted provided that the following conditions are
10 // met:
11 // * Redistributions of source code must retain the above copyright
12 // notice, this list of conditions and the following disclaimer.
13 // * Redistributions in binary form must reproduce the above
14 // copyright notice, this list of conditions and the following disclaimer
15 // in the documentation and/or other materials provided with the
16 // distribution.
17 // * Neither the name of Industrial Light & Magic nor the names of
18 // its contributors may be used to endorse or promote products derived
19 // from this software without specific prior written permission.
20 //
21 // THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
22 // "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
23 // LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
24 // A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
25 // OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
26 // SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
27 // LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
28 // DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
29 // THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
30 // (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
31 // OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
32 //
33 ///////////////////////////////////////////////////////////////////////////
34
35 #include "ImfGenericInputFile.h"
36
37 #include <ImfVersion.h>
38 #include <ImfXdr.h>
39 #include <Iex.h>
40 #include <OpenEXRConfig.h>
41
42 OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_ENTER
43
readMagicNumberAndVersionField(OPENEXR_IMF_INTERNAL_NAMESPACE::IStream & is,int & version)44 void GenericInputFile::readMagicNumberAndVersionField(OPENEXR_IMF_INTERNAL_NAMESPACE::IStream& is, int& version)
45 {
46 //
47 // Read the magic number and the file format version number.
48 // Then check if we can read the rest of this file.
49 //
50
51 int magic;
52
53 OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, magic);
54 OPENEXR_IMF_INTERNAL_NAMESPACE::Xdr::read <OPENEXR_IMF_INTERNAL_NAMESPACE::StreamIO> (is, version);
55
56 if (magic != MAGIC)
57 {
58 throw IEX_NAMESPACE::InputExc ("File is not an image file.");
59 }
60
61 if (getVersion (version) != EXR_VERSION)
62 {
63 THROW (IEX_NAMESPACE::InputExc, "Cannot read "
64 "version " << getVersion (version) << " "
65 "image files. Current file format version "
66 "is " << EXR_VERSION << ".");
67 }
68
69 if (!supportsFlags (getFlags (version)))
70 {
71 THROW (IEX_NAMESPACE::InputExc, "The file format version number's flag field "
72 "contains unrecognized flags.");
73 }
74 }
75
76 OPENEXR_IMF_INTERNAL_NAMESPACE_SOURCE_EXIT
77