diff options
Diffstat (limited to '3rdparty/lzma/CPP/7zip/Common/UniqBlocks.cpp')
-rw-r--r-- | 3rdparty/lzma/CPP/7zip/Common/UniqBlocks.cpp | 57 |
1 files changed, 57 insertions, 0 deletions
diff --git a/3rdparty/lzma/CPP/7zip/Common/UniqBlocks.cpp b/3rdparty/lzma/CPP/7zip/Common/UniqBlocks.cpp new file mode 100644 index 00000000000..8f754e177e8 --- /dev/null +++ b/3rdparty/lzma/CPP/7zip/Common/UniqBlocks.cpp @@ -0,0 +1,57 @@ +// UniqBlocks.cpp + +#include "StdAfx.h" + +#include <string.h> + +#include "UniqBlocks.h" + +unsigned CUniqBlocks::AddUniq(const Byte *data, size_t size) +{ + unsigned left = 0, right = Sorted.Size(); + while (left != right) + { + unsigned mid = (left + right) / 2; + unsigned index = Sorted[mid]; + const CByteBuffer &buf = Bufs[index]; + size_t sizeMid = buf.Size(); + if (size < sizeMid) + right = mid; + else if (size > sizeMid) + left = mid + 1; + else + { + if (size == 0) + return index; + int cmp = memcmp(data, buf, size); + if (cmp == 0) + return index; + if (cmp < 0) + right = mid; + else + left = mid + 1; + } + } + unsigned index = Bufs.Size(); + Sorted.Insert(left, index); + Bufs.AddNew().CopyFrom(data, size); + return index; +} + +UInt64 CUniqBlocks::GetTotalSizeInBytes() const +{ + UInt64 size = 0; + FOR_VECTOR (i, Bufs) + size += Bufs[i].Size(); + return size; +} + +void CUniqBlocks::GetReverseMap() +{ + unsigned num = Sorted.Size(); + BufIndexToSortedIndex.ClearAndSetSize(num); + unsigned *p = &BufIndexToSortedIndex[0]; + const unsigned *sorted = &Sorted[0]; + for (unsigned i = 0; i < num; i++) + p[sorted[i]] = i; +} |