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/*
* Copyright (C) 2006 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.
*/
//
// Zip archive entries.
//
// The ZipEntry class is tightly meshed with the ZipFile class.
//
#ifndef __LIBS_ZIPENTRY_H
#define __LIBS_ZIPENTRY_H
#include <stdlib.h>
#include <stdint.h>
#include <stdio.h>
typedef int status_t;
namespace android {
class ZipFile;
/*
* ZipEntry objects represent a single entry in a Zip archive.
*
* File information is stored in two places: next to the file data (the Local
* File Header, and possibly a Data Descriptor), and at the end of the file
* (the Central Directory Entry). The two must be kept in sync.
*/
class ZipEntry {
public:
friend class ZipFile;
ZipEntry(void) {}
~ZipEntry(void) {}
/*
* Some basic functions for raw data manipulation. "LE" means
* Little Endian.
*/
static inline uint16_t getShortLE(const uint8_t* buf) {
return buf[0] | (buf[1] << 8);
}
static inline uint32_t getLongLE(const uint8_t* buf) {
return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
}
static inline void putShortLE(uint8_t* buf, uint16_t val) {
buf[0] = (uint8_t) val;
buf[1] = (uint8_t) (val >> 8);
}
protected:
/*
* Initialize the structure from the file, which is pointing at
* our Central Directory entry. And rewrite it.
*/
status_t initAndRewriteFromCDE(FILE* fp);
private:
/* these are private and not defined */
ZipEntry(const ZipEntry& src);
ZipEntry& operator=(const ZipEntry& src);
/*
* Every entry in the Zip archive starts off with one of these.
*/
class LocalFileHeader {
public:
LocalFileHeader(void) {}
status_t rewrite(FILE* fp);
enum {
kSignature = 0x04034b50,
kLFHLen = 30, // LocalFileHdr len, excl. var fields
};
};
/*
* Every entry in the Zip archive has one of these in the "central
* directory" at the end of the file.
*/
class CentralDirEntry {
public:
CentralDirEntry(void) :
mLocalHeaderRelOffset(0)
{}
status_t rewrite(FILE* fp);
uint32_t mLocalHeaderRelOffset;
enum {
kSignature = 0x02014b50,
kCDELen = 46, // CentralDirEnt len, excl. var fields
};
};
LocalFileHeader mLFH;
CentralDirEntry mCDE;
};
}; // namespace android
#endif // __LIBS_ZIPENTRY_H
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