68 lines
2.1 KiB
C
68 lines
2.1 KiB
C
|
/*
|
||
|
|
* Copyright (C) 2007 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.
|
||
|
|
*/
|
||
|
|
|
||
|
|
//
|
||
|
|
// Miscellaneous zip/gzip utility functions.
|
||
|
|
//
|
||
|
|
#ifndef __LIBS_ZIPUTILS_H
|
||
|
|
#define __LIBS_ZIPUTILS_H
|
||
|
|
|
||
|
|
#include <stdio.h>
|
||
|
|
|
||
|
|
namespace android {
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Container class for utility functions, primarily for namespace reasons.
|
||
|
|
*/
|
||
|
|
class ZipUtils {
|
||
|
|
public:
|
||
|
|
/*
|
||
|
|
* General utility function for uncompressing "deflate" data from a file
|
||
|
|
* to a buffer.
|
||
|
|
*/
|
||
|
|
static bool inflateToBuffer(int fd, void* buf, long uncompressedLen,
|
||
|
|
long compressedLen);
|
||
|
|
static bool inflateToBuffer(FILE* fp, void* buf, long uncompressedLen,
|
||
|
|
long compressedLen);
|
||
|
|
|
||
|
|
/*
|
||
|
|
* Someday we might want to make this generic and handle bzip2 ".bz2"
|
||
|
|
* files too.
|
||
|
|
*
|
||
|
|
* We could declare gzip to be a sub-class of zip that has exactly
|
||
|
|
* one always-compressed entry, but we currently want to treat Zip
|
||
|
|
* and gzip as distinct, so there's no value.
|
||
|
|
*
|
||
|
|
* The zlib library has some gzip utilities, but it has no interface
|
||
|
|
* for extracting the uncompressed length of the file (you do *not*
|
||
|
|
* want to gzseek to the end).
|
||
|
|
*
|
||
|
|
* Pass in a seeked file pointer for the gzip file. If this is a gzip
|
||
|
|
* file, we set our return values appropriately and return "true" with
|
||
|
|
* the file seeked to the start of the compressed data.
|
||
|
|
*/
|
||
|
|
static bool examineGzip(FILE* fp, int* pCompressionMethod,
|
||
|
|
long* pUncompressedLen, long* pCompressedLen, unsigned long* pCRC32);
|
||
|
|
|
||
|
|
private:
|
||
|
|
ZipUtils() {}
|
||
|
|
~ZipUtils() {}
|
||
|
|
};
|
||
|
|
|
||
|
|
}; // namespace android
|
||
|
|
|
||
|
|
#endif /*__LIBS_ZIPUTILS_H*/
|