1 /*
2  * Copyright (C) 2009 The Android Open Source Project
3  *
4  * Licensed under the Apache License, Version 2.0 (the "License");
5  * you may not use this file except in compliance with the License.
6  * You may obtain a copy of the License at
7  *
8  *      http://www.apache.org/licenses/LICENSE-2.0
9  *
10  * Unless required by applicable law or agreed to in writing, software
11  * distributed under the License is distributed on an "AS IS" BASIS,
12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
13  * See the License for the specific language governing permissions and
14  * limitations under the License.
15  */
16 
17 // Image patch chunk types
18 #define CHUNK_NORMAL   0
19 #define CHUNK_GZIP     1   // version 1 only
20 #define CHUNK_DEFLATE  2   // version 2 only
21 #define CHUNK_RAW      3   // version 2 only
22 
23 // The gzip header size is actually variable, but we currently don't
24 // support gzipped data with any of the optional fields, so for now it
25 // will always be ten bytes.  See RFC 1952 for the definition of the
26 // gzip format.
27 #define GZIP_HEADER_LEN   10
28 
29 // The gzip footer size really is fixed.
30 #define GZIP_FOOTER_LEN   8
31