96 lines
2.1 KiB
C
96 lines
2.1 KiB
C
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#pragma once
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#include "common/IDataStream.h"
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#include "common/IDynamicCreate.h"
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#if ENABLE_IDYNAMICCREATE
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/**
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* An object archive
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*
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* This class implements reading and instantiating objects from an object archive.
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*/
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class IArchive
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{
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public:
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class iterator;
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friend iterator;
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IArchive();
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IArchive(IDataStream * inStream);
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~IArchive();
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void AttachStream(IDataStream * inStream);
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void Dispose(void);
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iterator begin(void) { return iterator(0, this); }
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iterator end(void) { return iterator(header.numEntries, this); }
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static const UInt32 kFileID = CHAR_CODE(0x00, 'A', 'R', 0x01);
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static const UInt32 kCurrentVersion = VERSION_CODE(1, 0, 0);
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private:
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struct FileHeader
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{
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UInt32 fileID; // IArchive::kFileID
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UInt32 version; // IArchive::kCurrentVersion
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UInt32 numEntries;
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UInt32 nameTableOffset;
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UInt32 nameTableLength;
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};
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struct HeaderEntry
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{
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UInt32 typeID;
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UInt32 subID;
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UInt32 dataOffset;
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UInt32 dataLength;
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UInt32 nameOffset;
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};
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void ReadHeader(void);
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IDataStream * theStream;
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FileHeader header;
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HeaderEntry * entries;
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char * nameTable;
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public:
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class iterator
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{
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public:
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iterator() { idx = 0; owner = NULL; }
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iterator(UInt32 inIdx, IArchive * inArchive) { idx = inIdx; owner = inArchive; }
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~iterator() { }
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IDynamic * Instantiate(void);
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UInt32 GetTypeID(void) { return GetData()->typeID; }
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UInt32 GetSubID(void) { return GetData()->subID; }
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UInt32 GetDataLength(void) { return GetData()->dataLength; }
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char * GetName(void) { return &owner->nameTable[GetData()->nameOffset]; }
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void * GetBuffer(UInt32 * outLength);
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iterator & operator++() { Next(); return *this; }
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iterator & operator--() { Prev(); return *this; }
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void NextOfType(UInt32 typeID);
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void Next(void) { idx++; }
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void PrevOfType(UInt32 typeID);
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void Prev(void) { idx--; }
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private:
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HeaderEntry * GetData(void) { return &owner->entries[idx]; }
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UInt32 GetDataOffset(void) { return GetData()->dataOffset; }
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UInt32 idx;
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IArchive * owner;
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};
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};
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#endif
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