--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/7zip/Compress/CodecExports.cpp	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,157 @@
+// CodecExports.cpp
+
+#include "StdAfx.h"
+
+#include "../../Common/ComTry.h"
+#include "../../Windows/PropVariant.h"
+#include "../Common/RegisterCodec.h"
+#include "../ICoder.h"
+
+extern unsigned int g_NumCodecs;
+extern const CCodecInfo *g_Codecs[]; 
+
+static const UInt16 kDecodeId = 0x2790;
+
+DEFINE_GUID(CLSID_CCodec, 
+0x23170F69, 0x40C1, kDecodeId, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00);
+
+static inline HRESULT SetPropString(const char *s, unsigned int size, PROPVARIANT *value)
+{
+  if ((value->bstrVal = ::SysAllocStringByteLen(s, size)) != 0)
+    value->vt = VT_BSTR;
+  return S_OK;
+}
+
+static inline HRESULT SetPropGUID(const GUID &guid, PROPVARIANT *value)
+{
+  return SetPropString((const char *)&guid, sizeof(GUID), value);
+}
+
+static HRESULT SetClassID(CMethodId id, bool encode, PROPVARIANT *value)
+{
+  GUID clsId = CLSID_CCodec;
+  for (int i = 0; i < sizeof(id); i++, id >>= 8)
+    clsId.Data4[i] = (Byte)(id & 0xFF);
+  if (encode)
+    clsId.Data3++;
+  return SetPropGUID(clsId, value);
+}
+
+static HRESULT FindCodecClassId(const GUID *clsID, UInt32 isCoder2, bool isFilter, bool &encode, int &index)
+{
+  index = -1;
+  if (clsID->Data1 != CLSID_CCodec.Data1 || 
+      clsID->Data2 != CLSID_CCodec.Data2 ||
+      (clsID->Data3 & ~1) != kDecodeId)
+    return S_OK;
+  encode = (clsID->Data3 != kDecodeId);
+  UInt64 id = 0;
+  for (int j = 0; j < 8; j++)
+    id |= ((UInt64)clsID->Data4[j]) << (8 * j);
+  for (UInt32 i = 0; i < g_NumCodecs; i++)
+  {
+    const CCodecInfo &codec = *g_Codecs[i];
+    if (id != codec.Id || encode && !codec.CreateEncoder || !encode && !codec.CreateDecoder)
+      continue;
+    if (!isFilter && codec.IsFilter || isFilter && !codec.IsFilter ||
+        codec.NumInStreams != 1 && !isCoder2 || codec.NumInStreams == 1 && isCoder2)
+      return E_NOINTERFACE;
+    index = i;
+    return S_OK;
+  }
+  return S_OK;
+}
+
+STDAPI CreateCoder2(bool encode, UInt32 index, const GUID *iid, void **outObject)
+{
+  COM_TRY_BEGIN
+  *outObject = 0;
+  bool isCoder = (*iid == IID_ICompressCoder) != 0;
+  bool isCoder2 = (*iid == IID_ICompressCoder2) != 0;
+  bool isFilter = (*iid == IID_ICompressFilter) != 0;
+  const CCodecInfo &codec = *g_Codecs[index];
+  if (!isFilter && codec.IsFilter || isFilter && !codec.IsFilter ||
+      codec.NumInStreams != 1 && !isCoder2 || codec.NumInStreams == 1 && isCoder2)
+    return E_NOINTERFACE;
+  if (encode)
+  {
+    if (!codec.CreateEncoder)
+      return CLASS_E_CLASSNOTAVAILABLE;
+    *outObject = codec.CreateEncoder();
+  }
+  else
+  {
+    if (!codec.CreateDecoder)
+      return CLASS_E_CLASSNOTAVAILABLE;
+    *outObject = codec.CreateDecoder();
+  }
+  if (isCoder)
+    ((ICompressCoder *)*outObject)->AddRef();
+  else if (isCoder2)
+    ((ICompressCoder2 *)*outObject)->AddRef();
+  else
+    ((ICompressFilter *)*outObject)->AddRef();
+  return S_OK;
+  COM_TRY_END
+}
+
+STDAPI CreateCoder(const GUID *clsid, const GUID *iid, void **outObject)
+{
+  *outObject = 0;
+  bool isCoder = (*iid == IID_ICompressCoder) != 0;
+  bool isCoder2 = (*iid == IID_ICompressCoder2) != 0;
+  bool isFilter = (*iid == IID_ICompressFilter) != 0;
+  if (!isCoder && !isCoder2 && !isFilter)
+    return E_NOINTERFACE;
+  bool encode;
+  int codecIndex;
+  HRESULT res = FindCodecClassId(clsid, isCoder2, isFilter, encode, codecIndex);
+  if (res != S_OK)
+    return res;
+  if (codecIndex < 0)
+    return CLASS_E_CLASSNOTAVAILABLE;
+  return CreateCoder2(encode, codecIndex, iid, outObject);
+}
+
+STDAPI GetMethodProperty(UInt32 codecIndex, PROPID propID, PROPVARIANT *value)
+{
+  ::VariantClear((VARIANTARG *)value);
+  const CCodecInfo &codec = *g_Codecs[codecIndex];
+  switch(propID)
+  {
+    case NMethodPropID::kID:
+    {
+      value->uhVal.QuadPart = (UInt64)codec.Id;
+      value->vt = VT_UI8;
+      break;
+    }
+    case NMethodPropID::kName:
+      if ((value->bstrVal = ::SysAllocString(codec.Name)) != 0)
+        value->vt = VT_BSTR;
+      break;
+    case NMethodPropID::kDecoder:
+      if (codec.CreateDecoder)
+        return SetClassID(codec.Id, false, value);
+      break;
+    case NMethodPropID::kEncoder:
+      if (codec.CreateEncoder)
+        return SetClassID(codec.Id, true, value);
+      break;
+    case NMethodPropID::kInStreams:
+    {
+      if (codec.NumInStreams != 1)
+      {
+        value->vt = VT_UI4;
+        value->ulVal = codec.NumInStreams;
+      }
+      break;
+    }
+  }
+  return S_OK;
+}
+
+STDAPI GetNumberOfMethods(UINT32 *numCodecs)
+{
+  *numCodecs = g_NumCodecs;
+  return S_OK;
+}