117 lines
3 KiB
C
117 lines
3 KiB
C
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/*
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* Copyright (C) 2006 The Android Open Source Project
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*
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* Licensed under the Apache License, Version 2.0 (the "License");
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* you may not use this file except in compliance with the License.
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* You may obtain a copy of the License at
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*
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* http://www.apache.org/licenses/LICENSE-2.0
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*
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* Unless required by applicable law or agreed to in writing, software
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* distributed under the License is distributed on an "AS IS" BASIS,
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* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
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* See the License for the specific language governing permissions and
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* limitations under the License.
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*/
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//
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// Zip archive entries.
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//
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// The ZipEntry class is tightly meshed with the ZipFile class.
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//
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#ifndef __LIBS_ZIPENTRY_H
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#define __LIBS_ZIPENTRY_H
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#include <stdlib.h>
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#include <stdio.h>
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typedef int status_t;
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namespace android {
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class ZipFile;
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/*
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* ZipEntry objects represent a single entry in a Zip archive.
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*
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* File information is stored in two places: next to the file data (the Local
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* File Header, and possibly a Data Descriptor), and at the end of the file
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* (the Central Directory Entry). The two must be kept in sync.
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*/
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class ZipEntry {
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public:
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friend class ZipFile;
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ZipEntry(void) {}
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~ZipEntry(void) {}
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/*
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* Some basic functions for raw data manipulation. "LE" means
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* Little Endian.
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*/
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static inline unsigned short getShortLE(const unsigned char* buf) {
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return buf[0] | (buf[1] << 8);
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}
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static inline unsigned long getLongLE(const unsigned char* buf) {
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return buf[0] | (buf[1] << 8) | (buf[2] << 16) | (buf[3] << 24);
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}
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static inline void putShortLE(unsigned char* buf, short val) {
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buf[0] = (unsigned char) val;
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buf[1] = (unsigned char) (val >> 8);
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}
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protected:
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/*
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* Initialize the structure from the file, which is pointing at
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* our Central Directory entry. And rewrite it.
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*/
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status_t initAndRewriteFromCDE(FILE* fp);
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private:
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/* these are private and not defined */
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ZipEntry(const ZipEntry& src);
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ZipEntry& operator=(const ZipEntry& src);
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/*
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* Every entry in the Zip archive starts off with one of these.
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*/
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class LocalFileHeader {
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public:
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LocalFileHeader(void) {}
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status_t rewrite(FILE* fp);
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enum {
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kSignature = 0x04034b50,
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kLFHLen = 30, // LocalFileHdr len, excl. var fields
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};
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};
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/*
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* Every entry in the Zip archive has one of these in the "central
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* directory" at the end of the file.
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*/
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class CentralDirEntry {
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public:
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CentralDirEntry(void) :
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mLocalHeaderRelOffset(0)
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{}
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status_t rewrite(FILE* fp);
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unsigned long mLocalHeaderRelOffset;
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enum {
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kSignature = 0x02014b50,
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kCDELen = 46, // CentralDirEnt len, excl. var fields
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};
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};
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LocalFileHeader mLFH;
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CentralDirEntry mCDE;
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};
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}; // namespace android
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#endif // __LIBS_ZIPENTRY_H
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