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1 // Copyright 2003, 2004 Colin Percival | 1 // Copyright 2003, 2004 Colin Percival |
2 // All rights reserved | 2 // All rights reserved |
3 // | 3 // |
4 // Redistribution and use in source and binary forms, with or without | 4 // Redistribution and use in source and binary forms, with or without |
5 // modification, are permitted providing that the following conditions | 5 // modification, are permitted providing that the following conditions |
6 // are met: | 6 // are met: |
7 // 1. Redistributions of source code must retain the above copyright | 7 // 1. Redistributions of source code must retain the above copyright |
8 // notice, this list of conditions and the following disclaimer. | 8 // notice, this list of conditions and the following disclaimer. |
9 // 2. Redistributions in binary form must reproduce the above copyright | 9 // 2. Redistributions in binary form must reproduce the above copyright |
10 // notice, this list of conditions and the following disclaimer in the | 10 // notice, this list of conditions and the following disclaimer in the |
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40 // found in the LICENSE file. | 40 // found in the LICENSE file. |
41 | 41 |
42 #ifndef COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ | 42 #ifndef COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ |
43 #define COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ | 43 #define COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ |
44 | 44 |
45 #include <stdint.h> | 45 #include <stdint.h> |
46 | 46 |
47 #include "base/files/file_util.h" | 47 #include "base/files/file_util.h" |
48 | 48 |
49 namespace courgette { | 49 namespace courgette { |
| 50 class SourceStream; |
| 51 class SinkStream; |
| 52 } // namespace courgette |
| 53 |
| 54 namespace bsdiff { |
50 | 55 |
51 enum BSDiffStatus { | 56 enum BSDiffStatus { |
52 OK = 0, | 57 OK = 0, |
53 MEM_ERROR = 1, | 58 MEM_ERROR = 1, |
54 CRC_ERROR = 2, | 59 CRC_ERROR = 2, |
55 READ_ERROR = 3, | 60 READ_ERROR = 3, |
56 UNEXPECTED_ERROR = 4, | 61 UNEXPECTED_ERROR = 4, |
57 WRITE_ERROR = 5 | 62 WRITE_ERROR = 5 |
58 }; | 63 }; |
59 | 64 |
60 class SourceStream; | |
61 class SinkStream; | |
62 | |
63 // Creates a binary patch. | 65 // Creates a binary patch. |
64 // | 66 // |
65 BSDiffStatus CreateBinaryPatch(SourceStream* old_stream, | 67 BSDiffStatus CreateBinaryPatch(courgette::SourceStream* old_stream, |
66 SourceStream* new_stream, | 68 courgette::SourceStream* new_stream, |
67 SinkStream* patch_stream); | 69 courgette::SinkStream* patch_stream); |
68 | 70 |
69 // Applies the given patch file to a given source file. This method validates | 71 // Applies the given patch file to a given source file. This method validates |
70 // the CRC of the original file stored in the patch file, before applying the | 72 // the CRC of the original file stored in the patch file, before applying the |
71 // patch to it. | 73 // patch to it. |
72 // | 74 // |
73 BSDiffStatus ApplyBinaryPatch(SourceStream* old_stream, | 75 BSDiffStatus ApplyBinaryPatch(courgette::SourceStream* old_stream, |
74 SourceStream* patch_stream, | 76 courgette::SourceStream* patch_stream, |
75 SinkStream* new_stream); | 77 courgette::SinkStream* new_stream); |
76 | 78 |
77 // As above, but simply takes the file paths. | 79 // As above, but simply takes the file paths. |
78 BSDiffStatus ApplyBinaryPatch(const base::FilePath& old_stream, | 80 BSDiffStatus ApplyBinaryPatch(const base::FilePath& old_stream, |
79 const base::FilePath& patch_stream, | 81 const base::FilePath& patch_stream, |
80 const base::FilePath& new_stream); | 82 const base::FilePath& new_stream); |
81 | 83 |
82 // The following declarations are common to the patch-creation and | 84 // The following declarations are common to the patch-creation and |
83 // patch-application code. | 85 // patch-application code. |
84 | 86 |
85 // The patch stream starts with a MBSPatchHeader. | 87 // The patch stream starts with a MBSPatchHeader. |
86 typedef struct MBSPatchHeader_ { | 88 typedef struct MBSPatchHeader_ { |
87 char tag[8]; // Contains MBS_PATCH_HEADER_TAG. | 89 char tag[8]; // Contains MBS_PATCH_HEADER_TAG. |
88 uint32_t slen; // Length of the file to be patched. | 90 uint32_t slen; // Length of the file to be patched. |
89 uint32_t scrc32; // CRC32 of the file to be patched. | 91 uint32_t scrc32; // CRC32 of the file to be patched. |
90 uint32_t dlen; // Length of the result file. | 92 uint32_t dlen; // Length of the result file. |
91 } MBSPatchHeader; | 93 } MBSPatchHeader; |
92 | 94 |
93 // This is the value for the tag field. Must match length exactly, not counting | 95 // This is the value for the tag field. Must match length exactly, not counting |
94 // null at end of string. | 96 // null at end of string. |
95 #define MBS_PATCH_HEADER_TAG "GBSDIF42" | 97 #define MBS_PATCH_HEADER_TAG "GBSDIF42" |
96 | 98 |
97 } // namespace | 99 } // namespace bsdiff |
| 100 |
98 #endif // COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ | 101 #endif // COURGETTE_THIRD_PARTY_BSDIFF_BSDIFF_H_ |
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