--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Archive/Common/CoderMixer2.cpp	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,121 @@
+// CoderMixer2.cpp
+
+#include "StdAfx.h"
+
+#include "CoderMixer2.h"
+
+namespace NCoderMixer {
+
+CBindReverseConverter::CBindReverseConverter(const CBindInfo &srcBindInfo):
+  _srcBindInfo(srcBindInfo)
+{
+  srcBindInfo.GetNumStreams(NumSrcInStreams, _numSrcOutStreams);
+
+  UInt32  j;
+  for (j = 0; j < NumSrcInStreams; j++)
+  {
+    _srcInToDestOutMap.Add(0);
+    DestOutToSrcInMap.Add(0);
+  }
+  for (j = 0; j < _numSrcOutStreams; j++)
+  {
+    _srcOutToDestInMap.Add(0);
+    _destInToSrcOutMap.Add(0);
+  }
+
+  UInt32 destInOffset = 0;
+  UInt32 destOutOffset = 0;
+  UInt32 srcInOffset = NumSrcInStreams;
+  UInt32 srcOutOffset = _numSrcOutStreams;
+
+  for (int i = srcBindInfo.Coders.Size() - 1; i >= 0; i--)
+  {
+    const CCoderStreamsInfo &srcCoderInfo = srcBindInfo.Coders[i];
+
+    srcInOffset -= srcCoderInfo.NumInStreams;
+    srcOutOffset -= srcCoderInfo.NumOutStreams;
+    
+    UInt32 j;
+    for (j = 0; j < srcCoderInfo.NumInStreams; j++, destOutOffset++)
+    {
+      UInt32 index = srcInOffset + j;
+      _srcInToDestOutMap[index] = destOutOffset;
+      DestOutToSrcInMap[destOutOffset] = index;
+    }
+    for (j = 0; j < srcCoderInfo.NumOutStreams; j++, destInOffset++)
+    {
+      UInt32 index = srcOutOffset + j;
+      _srcOutToDestInMap[index] = destInOffset;
+      _destInToSrcOutMap[destInOffset] = index;
+    }
+  }
+}
+
+void CBindReverseConverter::CreateReverseBindInfo(CBindInfo &destBindInfo)
+{
+  destBindInfo.Coders.Clear();
+  destBindInfo.BindPairs.Clear();
+  destBindInfo.InStreams.Clear();
+  destBindInfo.OutStreams.Clear();
+
+  int i;
+  for (i = _srcBindInfo.Coders.Size() - 1; i >= 0; i--)
+  {
+    const CCoderStreamsInfo &srcCoderInfo = _srcBindInfo.Coders[i];
+    CCoderStreamsInfo destCoderInfo;
+    destCoderInfo.NumInStreams = srcCoderInfo.NumOutStreams;
+    destCoderInfo.NumOutStreams = srcCoderInfo.NumInStreams;
+    destBindInfo.Coders.Add(destCoderInfo);
+  }
+  for (i = _srcBindInfo.BindPairs.Size() - 1; i >= 0; i--)
+  {
+    const CBindPair &srcBindPair = _srcBindInfo.BindPairs[i];
+    CBindPair destBindPair;
+    destBindPair.InIndex = _srcOutToDestInMap[srcBindPair.OutIndex];
+    destBindPair.OutIndex = _srcInToDestOutMap[srcBindPair.InIndex];
+    destBindInfo.BindPairs.Add(destBindPair);
+  }
+  for (i = 0; i < _srcBindInfo.InStreams.Size(); i++)
+    destBindInfo.OutStreams.Add(_srcInToDestOutMap[_srcBindInfo.InStreams[i]]);
+  for (i = 0; i < _srcBindInfo.OutStreams.Size(); i++)
+    destBindInfo.InStreams.Add(_srcOutToDestInMap[_srcBindInfo.OutStreams[i]]);
+}
+
+CCoderInfo2::CCoderInfo2(UInt32 numInStreams, UInt32 numOutStreams): 
+    NumInStreams(numInStreams),
+    NumOutStreams(numOutStreams)
+{
+  InSizes.Reserve(NumInStreams);
+  InSizePointers.Reserve(NumInStreams);
+  OutSizePointers.Reserve(NumOutStreams);
+  OutSizePointers.Reserve(NumOutStreams);
+}
+
+static void SetSizes(const UInt64 **srcSizes, CRecordVector<UInt64> &sizes, 
+    CRecordVector<const UInt64 *> &sizePointers, UInt32 numItems)
+{
+  sizes.Clear();
+  sizePointers.Clear();
+  for(UInt32 i = 0; i < numItems; i++)
+  {
+    if (srcSizes == 0 || srcSizes[i] == NULL)
+    {
+      sizes.Add(0);
+      sizePointers.Add(NULL);
+    }
+    else
+    {
+      sizes.Add(*srcSizes[i]);
+      sizePointers.Add(&sizes.Back());
+    }
+  }
+}
+
+void CCoderInfo2::SetCoderInfo(const UInt64 **inSizes,
+      const UInt64 **outSizes)
+{
+  SetSizes(inSizes, InSizes, InSizePointers, NumInStreams);
+  SetSizes(outSizes, OutSizes, OutSizePointers, NumOutStreams);
+}
+
+}