46122852f1
* ReaderImplBase:
- Add virtual CreateCachedHeapReader() which can create a cached
reader based on the given heap reader.
- Rename HeapReader() to RawHeapReader() and add HeapReader() for the
cached heap reader.
- Add DetachHeapReader() to allow a clients to remove the heap
reader(s) after deleting the ReaderImplBase object.
* packagefs:
- Add CachedDataReader class, which wraps a given
BAbstractBufferedDataReader and provides caching for it using a
VMCache. The implementation is based on the IOCache implementation.
- Use CachedDataReader to wrap the heap reader. For file data that
means they are cached twice -- in the heap reader cache and in the
file cache -- but due to the heap reader using a VMCache as well,
the pages will be recycled automatically anyway. For attribute data
the cache should be very helpful, since they weren't cached at all
before.
101 lines
2.1 KiB
C++
101 lines
2.1 KiB
C++
/*
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* Copyright 2009, Ingo Weinhold, ingo_weinhold@gmx.de.
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* Copyright 2011, Oliver Tappe <zooey@hirschkaefer.de>
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* Distributed under the terms of the MIT License.
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*/
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#ifndef _PACKAGE__HPKG__PRIVATE__PACKAGE_READER_IMPL_H_
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#define _PACKAGE__HPKG__PRIVATE__PACKAGE_READER_IMPL_H_
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#include <package/hpkg/ReaderImplBase.h>
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namespace BPackageKit {
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namespace BHPKG {
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class BPackageEntry;
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class BPackageEntryAttribute;
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namespace BPrivate {
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class PackageReaderImpl : public ReaderImplBase {
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typedef ReaderImplBase inherited;
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public:
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PackageReaderImpl(BErrorOutput* errorOutput);
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~PackageReaderImpl();
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status_t Init(const char* fileName, uint32 flags);
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status_t Init(int fd, bool keepFD, uint32 flags);
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status_t ParseContent(
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BPackageContentHandler* contentHandler);
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status_t ParseContent(BLowLevelPackageContentHandler*
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contentHandler);
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int PackageFileFD() const;
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uint64 HeapOffset() const;
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uint64 HeapSize() const;
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PackageFileHeapReader* RawHeapReader() const
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{ return inherited::RawHeapReader(); }
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BAbstractBufferedDataReader* HeapReader() const
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{ return inherited::HeapReader(); }
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protected:
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// from ReaderImplBase
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virtual status_t ReadAttributeValue(uint8 type, uint8 encoding,
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AttributeValue& _value);
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private:
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struct AttributeAttributeHandler;
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struct EntryAttributeHandler;
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struct RootAttributeHandler;
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private:
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status_t _ParseTOC(AttributeHandlerContext* context,
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AttributeHandler* rootAttributeHandler);
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status_t _GetTOCBuffer(size_t size,
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const void*& _buffer);
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private:
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uint64 fHeapOffset;
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uint64 fHeapSize;
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PackageFileSection fTOCSection;
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};
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inline int
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PackageReaderImpl::PackageFileFD() const
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{
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return FD();
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}
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inline uint64
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PackageReaderImpl::HeapOffset() const
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{
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return fHeapOffset;
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}
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inline uint64
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PackageReaderImpl::HeapSize() const
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{
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return fHeapSize;
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}
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} // namespace BPrivate
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} // namespace BHPKG
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} // namespace BPackageKit
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#endif // _PACKAGE__HPKG__PRIVATE__PACKAGE_READER_IMPL_H_
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