58 lines
1.2 KiB
C++
58 lines
1.2 KiB
C++
// UniqBlocks.cpp
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#include "StdAfx.h"
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#include <string.h>
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#include "UniqBlocks.h"
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unsigned CUniqBlocks::AddUniq(const Byte *data, size_t size)
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{
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unsigned left = 0, right = Sorted.Size();
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while (left != right)
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{
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unsigned mid = (left + right) / 2;
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unsigned index = Sorted[mid];
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const CByteBuffer &buf = Bufs[index];
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size_t sizeMid = buf.Size();
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if (size < sizeMid)
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right = mid;
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else if (size > sizeMid)
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left = mid + 1;
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else
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{
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if (size == 0)
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return index;
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int cmp = memcmp(data, buf, size);
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if (cmp == 0)
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return index;
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if (cmp < 0)
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right = mid;
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else
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left = mid + 1;
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}
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}
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unsigned index = Bufs.Size();
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Sorted.Insert(left, index);
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Bufs.AddNew().CopyFrom(data, size);
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return index;
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}
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UInt64 CUniqBlocks::GetTotalSizeInBytes() const
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{
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UInt64 size = 0;
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FOR_VECTOR (i, Bufs)
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size += Bufs[i].Size();
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return size;
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}
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void CUniqBlocks::GetReverseMap()
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{
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unsigned num = Sorted.Size();
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BufIndexToSortedIndex.ClearAndSetSize(num);
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unsigned *p = &BufIndexToSortedIndex[0];
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const unsigned *sorted = &Sorted[0];
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for (unsigned i = 0; i < num; i++)
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p[sorted[i]] = i;
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}
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