ZipFile.h revision 41bc424c323f86806f04acd22304d4d149bc5dbe 
1/*
2 * Copyright (C) 2006 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//
18// Class to rewrite zip file headers to remove dynamic timestamps.
19//
20#ifndef __LIBS_ZIPFILE_H
21#define __LIBS_ZIPFILE_H
22
23#include <stdio.h>
24
25#include "ZipEntry.h"
26
27namespace android {
28
29/*
30 * Manipulate a Zip archive.
31 */
32class ZipFile {
33public:
34    ZipFile(void) : mZipFp(NULL) {}
35    ~ZipFile(void) {
36        if (mZipFp != NULL)
37            fclose(mZipFp);
38    }
39
40    /*
41     * Rewrite an archive's headers to remove dynamic timestamps.
42     */
43    status_t rewrite(const char* zipFileName);
44
45private:
46    /* these are private and not defined */
47    ZipFile(const ZipFile& src);
48    ZipFile& operator=(const ZipFile& src);
49
50    class EndOfCentralDir {
51    public:
52        EndOfCentralDir(void) : mTotalNumEntries(0), mCentralDirOffset(0) {}
53
54        status_t readBuf(const uint8_t* buf, int len);
55
56        uint16_t mTotalNumEntries;
57        uint32_t mCentralDirOffset;      // offset from first disk
58
59        enum {
60            kSignature      = 0x06054b50,
61            kEOCDLen        = 22,       // EndOfCentralDir len, excl. comment
62
63            kMaxCommentLen  = 65535,    // longest possible in ushort
64            kMaxEOCDSearch  = kMaxCommentLen + EndOfCentralDir::kEOCDLen,
65
66        };
67    };
68
69    /* read all entries in the central dir */
70    status_t rewriteCentralDir(void);
71
72    /*
73     * We use stdio FILE*, which gives us buffering but makes dealing
74     * with files >2GB awkward.  Until we support Zip64, we're fine.
75     */
76    FILE*           mZipFp;             // Zip file pointer
77
78    /* one of these per file */
79    EndOfCentralDir mEOCD;
80};
81
82}; // namespace android
83
84#endif // __LIBS_ZIPFILE_H
85