59 lines
1.2 KiB
C++
59 lines
1.2 KiB
C++
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#include "CBlockMgrIn.h"
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CBlockMgrIn::CBlockMgrIn(unsigned long count, CInputStream* src)
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{
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mpInputStream = src;
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mBlockCount = count;
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mBlockSizes.resize(count);
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for (unsigned long b = 0; b < count; b++)
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mBlockSizes[b] = src->ReadLong();
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}
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void CBlockMgrIn::Init()
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{
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// Initialize the block manager; this marks the start of the first block
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mCurBlock = 0;
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mCurBlockStart = mpInputStream->Tell();
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mBlocksStart = mpInputStream->Tell();
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}
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void CBlockMgrIn::ToBlock(unsigned long block)
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{
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unsigned long offset = mBlocksStart;
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for (unsigned long b = 0; b < block; b++)
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offset += mBlockSizes[b];
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mpInputStream->Seek(offset, SEEK_SET);
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mCurBlock = block;
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mCurBlockStart = mpInputStream->Tell();
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}
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void CBlockMgrIn::ToNextBlock()
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{
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mpInputStream->Seek(mCurBlockStart + mBlockSizes[mCurBlock], SEEK_SET);
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mCurBlock++;
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mCurBlockStart = mpInputStream->Tell();
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}
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long CBlockMgrIn::NextOffset()
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{
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return mCurBlockStart + mBlockSizes[mCurBlock];
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}
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long CBlockMgrIn::CurrentBlock()
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{
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return mCurBlock;
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}
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long CBlockMgrIn::CurrentBlockSize()
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{
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return mBlockSizes[mCurBlock];
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}
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void CBlockMgrIn::SetInputStream(CInputStream *in)
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{
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mpInputStream = in;
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}
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