129 lines
3.5 KiB
C
129 lines
3.5 KiB
C
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//----------------------------------------------------------------------
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// This software is part of the OpenBeOS distribution and is covered
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// by the OpenBeOS license.
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//---------------------------------------------------------------------
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/*!
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\file ResourceFile.h
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ResourceFile interface declaration.
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*/
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#ifndef _sk_resource_file_h_
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#define _sk_resource_file_h_
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#include <ByteOrder.h>
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#include "OffsetFile.h"
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struct resource_info;
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struct PEFContainerHeader;
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namespace StorageKit {
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class Exception;
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struct MemArea;
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class ResourceItem;
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struct resource_parse_info;
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class ResourcesContainer;
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/*!
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\class ResourceFile
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\brief Represents a file capable of containing resources.
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This class provides access to the resources of a file.
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Basically a ResourceFile object can be set to a file, load infos for the
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resources without loading their data (InitContainer()), read the data of
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one (ReadResource()) or all resources (ReadResources()) and write all
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resources to the file (WriteResources()).
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Note, that the object does only provide the I/O functionality, it does
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not store any information about the resources -- this is done via a
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ResourcesContainer. We gain flexibility using this approach, since e.g.
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a certain resource may be represented by more than one ResourceItem and
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we can have as many ResourcesContainers for the resources as we like.
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In particular it is nice, that at any time we can write an arbitrary set
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of resources to the file.
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\author <a href='mailto:bonefish@users.sf.net'>Ingo Weinhold</a>
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\version 0.0.0
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*/
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class ResourceFile {
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public:
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ResourceFile();
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virtual ~ResourceFile();
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status_t SetTo(BFile *file, bool clobber = false);
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void Unset();
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status_t InitCheck() const;
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status_t InitContainer(ResourcesContainer &container);
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status_t ReadResource(ResourceItem &resource, bool force = false);
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status_t ReadResources(ResourcesContainer &container, bool force = false);
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status_t WriteResources(ResourcesContainer &container);
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private:
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void _InitFile(BFile &file, bool clobber);
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void _InitELFFile(BFile &file);
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void _InitPEFFile(BFile &file, const PEFContainerHeader &pefHeader);
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void _ReadHeader(resource_parse_info &parseInfo);
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void _ReadIndex(resource_parse_info &parseInfo);
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bool _ReadIndexEntry(resource_parse_info &parseInfo, int32 index,
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uint32 tableOffset, bool peekAhead);
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void _ReadInfoTable(resource_parse_info &parseInfo);
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bool _ReadInfoTableEnd(const void *data, int32 dataSize);
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const void *_ReadResourceInfo(resource_parse_info &parseInfo,
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const MemArea &area,
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const resource_info *info, type_code type,
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bool *readIndices);
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status_t _WriteResources(ResourcesContainer &container);
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status_t _MakeEmptyResourceFile();
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inline int16 _GetInt16(int16 value);
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inline uint16 _GetUInt16(uint16 value);
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inline int32 _GetInt32(int32 value);
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inline uint32 _GetUInt32(uint32 value);
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private:
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OffsetFile fFile;
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uint32 fFileType;
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bool fHostEndianess;
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bool fEmptyResources;
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};
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// _GetInt16
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inline
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int16
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ResourceFile::_GetInt16(int16 value)
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{
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return (fHostEndianess ? value : B_SWAP_INT16(value));
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}
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// _GetUInt16
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inline
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uint16
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ResourceFile::_GetUInt16(uint16 value)
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{
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return (fHostEndianess ? value : B_SWAP_INT16(value));
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}
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// _GetInt32
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inline
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int32
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ResourceFile::_GetInt32(int32 value)
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{
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return (fHostEndianess ? value : B_SWAP_INT32(value));
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}
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// _GetUInt32
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inline
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uint32
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ResourceFile::_GetUInt32(uint32 value)
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{
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return (fHostEndianess ? value : B_SWAP_INT32(value));
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}
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}; // namespace StorageKit
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#endif // _sk_resource_file_h_
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