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haiku/headers/os/package/hpkg/PackageDataReader.h

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Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:05:38 +03:00
/*
* attributed copyright in all public HPKG headers to Haiku, Inc. * added my own copyright to a couple of files that I changed git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40321 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:15:33 +03:00
* Copyright 2009,2011, Haiku, Inc.
Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
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* Distributed under the terms of the MIT License.
*/
#ifndef _PACKAGE__HPKG__PACKAGE_DATA_READER_H_
#define _PACKAGE__HPKG__PACKAGE_DATA_READER_H_
#include <package/hpkg/DataReader.h>
namespace BPackageKit {
namespace BHPKG {
Rename BBlockBufferCache and friends to *Pool* Also move BBlockBufferPoolNoLock into BHPKG namespace with the other classes. Not sure why it wasn't there before.
2013-05-14 20:59:57 +04:00
class BBufferPool;
Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:05:38 +03:00
class BPackageData;
class BPackageDataReaderFactory {
public:
hpkg format: compress the whole heap Instead of handling compression for individual file/attribute data we do now compress the whole heap where they are stored. This significantly improves compression ratios. We still divide the uncompressed data into 64 KiB chunks and use a chunk offset array for the compressed chunks to allow for quick random access without too much overhead. The tradeoff is a limited possible compression ratio -- i.e. we won't be as good as tar.gz (though surprisingly with my test archives we did better than zip). The other package file sections (package attributes and TOC) are no longer compressed individually. Their uncompressed data are simply pushed onto the heap where the usual compression strategy applies. To simplify things the repository format has been changed in the same manner although it doesn't otherwise use the heap, since it only stores meta data. Due to the data compression having been exposed in public and private API, this change touches a lot of package kit using code, including packagefs and the boot loader packagefs support. The latter two haven't been tested yet. Moreover packagefs needs a new kind of cache so we avoid re-reading the same heap chunk for two different data items it contains.
2013-05-18 06:11:01 +04:00
BPackageDataReaderFactory();
Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:05:38 +03:00
hpkg format: compress the whole heap Instead of handling compression for individual file/attribute data we do now compress the whole heap where they are stored. This significantly improves compression ratios. We still divide the uncompressed data into 64 KiB chunks and use a chunk offset array for the compressed chunks to allow for quick random access without too much overhead. The tradeoff is a limited possible compression ratio -- i.e. we won't be as good as tar.gz (though surprisingly with my test archives we did better than zip). The other package file sections (package attributes and TOC) are no longer compressed individually. Their uncompressed data are simply pushed onto the heap where the usual compression strategy applies. To simplify things the repository format has been changed in the same manner although it doesn't otherwise use the heap, since it only stores meta data. Due to the data compression having been exposed in public and private API, this change touches a lot of package kit using code, including packagefs and the boot loader packagefs support. The latter two haven't been tested yet. Moreover packagefs needs a new kind of cache so we avoid re-reading the same heap chunk for two different data items it contains.
2013-05-18 06:11:01 +04:00
status_t CreatePackageDataReader(
BAbstractBufferedDataReader* dataReader,
Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:05:38 +03:00
const BPackageData& data,
package kit: internalize BPackageDataReader It is no longer public (or even private) API. BPackageDataReaderFactory returns a BAbstractBufferedDataReader instead. The advantage is that the latter doesn't have hpkg format specific dependencies.
2013-05-13 05:10:09 +04:00
BAbstractBufferedDataReader*& _reader);
Refactored hpkg implementation to provide some separation between public and private API (still far from ideal, but a start): * moved several HPKG-classes into the public namespace BPackageKit::HPKG * added fImpl-wrappers around PackageReader and PackageWriter to hide most of the gory details * adjusted 'package'-binary and packagefs accordingly git-svn-id: file:///srv/svn/repos/haiku/haiku/trunk@40320 a95241bf-73f2-0310-859d-f6bbb57e9c96
2011-01-30 18:05:38 +03:00
};
} // namespace BHPKG
} // namespace BPackageKit
#endif // _PACKAGE__HPKG__PACKAGE_DATA_READER_H_
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