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1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file | 1 // Copyright (c) 2013, the Dart project authors. Please see the AUTHORS file |
2 // for details. All rights reserved. Use of this source code is governed by a | 2 // for details. All rights reserved. Use of this source code is governed by a |
3 // BSD-style license that can be found in the LICENSE file. | 3 // BSD-style license that can be found in the LICENSE file. |
4 | 4 |
5 part of mime; | 5 library mime.magic_number; |
6 | 6 |
7 | 7 class MagicNumber { |
8 class _MagicNumber { | |
9 final String mimeType; | 8 final String mimeType; |
10 final List<int> numbers; | 9 final List<int> numbers; |
11 final List<int> mask; | 10 final List<int> mask; |
12 | 11 |
13 const _MagicNumber(this.mimeType, this.numbers, {this.mask}); | 12 const MagicNumber(this.mimeType, this.numbers, {this.mask}); |
14 | 13 |
15 bool matches(List<int> header) { | 14 bool matches(List<int> header) { |
16 if (header.length < numbers.length) return false; | 15 if (header.length < numbers.length) return false; |
17 | 16 |
18 for (int i = 0; i < numbers.length; i++) { | 17 for (int i = 0; i < numbers.length; i++) { |
19 if (mask != null) { | 18 if (mask != null) { |
20 if ((mask[i] & numbers[i]) != (mask[i] & header[i])) return false; | 19 if ((mask[i] & numbers[i]) != (mask[i] & header[i])) return false; |
21 } else { | 20 } else { |
22 if (numbers[i] != header[i]) return false; | 21 if (numbers[i] != header[i]) return false; |
23 } | 22 } |
24 } | 23 } |
25 | 24 |
26 return true; | 25 return true; |
27 } | 26 } |
28 | 27 |
29 } | 28 } |
30 | 29 |
31 const int _DEFAULT_MAGIC_NUMBERS_MAX_LENGTH = 16; | 30 const List<MagicNumber> DEFAULT_MAGIC_NUMBERS = const [ |
32 | 31 const MagicNumber('application/pdf', const [0x25, 0x50, 0x44, 0x46]), |
33 const List<_MagicNumber> _DEFAULT_MAGIC_NUMBERS = const [ | 32 const MagicNumber('application/postscript', const [0x25, 0x51]), |
34 const _MagicNumber('application/pdf', const [0x25, 0x50, 0x44, 0x46]), | 33 const MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x37, 0x61]), |
35 const _MagicNumber('application/postscript', const [0x25, 0x51]), | 34 const MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x39, 0x61]), |
36 const _MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x37, 0x61]), | 35 const MagicNumber('image/jpeg', const [0xFF, 0xD8]), |
37 const _MagicNumber('image/gif', const [0x47, 0x49, 0x46, 0x38, 0x39, 0x61]), | 36 const MagicNumber('image/png', |
38 const _MagicNumber('image/jpeg', const [0xFF, 0xD8]), | |
39 const _MagicNumber('image/png', | |
40 const [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]), | 37 const [0x89, 0x50, 0x4E, 0x47, 0x0D, 0x0A, 0x1A, 0x0A]), |
41 const _MagicNumber('image/tiff', const [0x49, 0x49, 0x2A, 0x00]), | 38 const MagicNumber('image/tiff', const [0x49, 0x49, 0x2A, 0x00]), |
42 const _MagicNumber('image/tiff', const [0x4D, 0x4D, 0x00, 0x2A]), | 39 const MagicNumber('image/tiff', const [0x4D, 0x4D, 0x00, 0x2A]), |
43 const _MagicNumber( | 40 const MagicNumber( |
44 'video/mp4', | 41 'video/mp4', |
45 const [0x00, 0x00, 0x00, 0x00, 0x66, 0x74, | 42 const [0x00, 0x00, 0x00, 0x00, 0x66, 0x74, |
46 0x79, 0x70, 0x33, 0x67, 0x70, 0x35], | 43 0x79, 0x70, 0x33, 0x67, 0x70, 0x35], |
47 mask: const [0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, | 44 mask: const [0xFF, 0xFF, 0xFF, 0x00, 0xFF, 0xFF, |
48 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]) | 45 0xFF, 0xFF, 0xFF, 0xFF, 0xFF, 0xFF]) |
49 ]; | 46 ]; |
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