diff options
Diffstat (limited to 'applypatch/include/applypatch/imgdiff.h')
| -rw-r--r-- | applypatch/include/applypatch/imgdiff.h | 39 |
1 files changed, 39 insertions, 0 deletions
diff --git a/applypatch/include/applypatch/imgdiff.h b/applypatch/include/applypatch/imgdiff.h new file mode 100644 index 000000000..22cbd4fa0 --- /dev/null +++ b/applypatch/include/applypatch/imgdiff.h @@ -0,0 +1,39 @@ +/* + * Copyright (C) 2009 The Android Open Source Project + * + * Licensed under the Apache License, Version 2.0 (the "License"); + * you may not use this file except in compliance with the License. + * You may obtain a copy of the License at + * + * http://www.apache.org/licenses/LICENSE-2.0 + * + * Unless required by applicable law or agreed to in writing, software + * distributed under the License is distributed on an "AS IS" BASIS, + * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. + * See the License for the specific language governing permissions and + * limitations under the License. + */ + +#ifndef _APPLYPATCH_IMGDIFF_H +#define _APPLYPATCH_IMGDIFF_H + +#include <stddef.h> + +// Image patch chunk types +#define CHUNK_NORMAL 0 +#define CHUNK_GZIP 1 // version 1 only +#define CHUNK_DEFLATE 2 // version 2 only +#define CHUNK_RAW 3 // version 2 only + +// The gzip header size is actually variable, but we currently don't +// support gzipped data with any of the optional fields, so for now it +// will always be ten bytes. See RFC 1952 for the definition of the +// gzip format. +static constexpr size_t GZIP_HEADER_LEN = 10; + +// The gzip footer size really is fixed. +static constexpr size_t GZIP_FOOTER_LEN = 8; + +int imgdiff(int argc, const char** argv); + +#endif // _APPLYPATCH_IMGDIFF_H |