diff -r ea891871f481 -r bb5522e88ab2 misc/libphysfs/lzma/CPP/Common/MyCom.h
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/misc/libphysfs/lzma/CPP/Common/MyCom.h	Mon Apr 10 12:06:43 2017 -0400
@@ -0,0 +1,218 @@
+// MyCom.h
+
+#ifndef __MYCOM_H
+#define __MYCOM_H
+
+#include "MyWindows.h"
+
+#ifndef RINOK
+#define RINOK(x) { HRESULT __result_ = (x); if(__result_ != S_OK) return __result_; }
+#endif
+
+template <class T>
+class CMyComPtr
+{
+  T* _p;
+public:
+  // typedef T _PtrClass;
+  CMyComPtr() { _p = NULL;}
+  CMyComPtr(T* p) {if ((_p = p) != NULL) p->AddRef(); }
+  CMyComPtr(const CMyComPtr<T>& lp)
+  {
+    if ((_p = lp._p) != NULL)
+      _p->AddRef();
+  }
+  ~CMyComPtr() { if (_p) _p->Release(); }
+  void Release() { if (_p) { _p->Release(); _p = NULL; } }
+  operator T*() const {  return (T*)_p;  }
+  // T& operator*() const {  return *_p; }
+  T** operator&() { return &_p; }
+  T* operator->() const { return _p; }
+  T* operator=(T* p) 
+  { 
+    if (p != 0)
+      p->AddRef();
+    if (_p) 
+      _p->Release();
+    _p = p;
+    return p;
+  }
+  T* operator=(const CMyComPtr<T>& lp) { return (*this = lp._p); }
+  bool operator!() const { return (_p == NULL); }
+  // bool operator==(T* pT) const {  return _p == pT; }
+  // Compare two objects for equivalence
+  void Attach(T* p2)
+  {
+    Release();
+    _p = p2;
+  }
+  T* Detach()
+  {
+    T* pt = _p;
+    _p = NULL;
+    return pt;
+  }
+  #ifdef _WIN32
+  HRESULT CoCreateInstance(REFCLSID rclsid, REFIID iid, LPUNKNOWN pUnkOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
+  {
+    return ::CoCreateInstance(rclsid, pUnkOuter, dwClsContext, iid, (void**)&_p);
+  }
+  #endif
+  /*
+  HRESULT CoCreateInstance(LPCOLESTR szProgID, LPUNKNOWN pUnkOuter = NULL, DWORD dwClsContext = CLSCTX_ALL)
+  {
+    CLSID clsid;
+    HRESULT hr = CLSIDFromProgID(szProgID, &clsid);
+    ATLASSERT(_p == NULL);
+    if (SUCCEEDED(hr))
+      hr = ::CoCreateInstance(clsid, pUnkOuter, dwClsContext, __uuidof(T), (void**)&_p);
+    return hr;
+  }
+  */
+  template <class Q>
+  HRESULT QueryInterface(REFGUID iid, Q** pp) const
+  {
+    return _p->QueryInterface(iid, (void**)pp);
+  }
+};
+
+//////////////////////////////////////////////////////////
+
+class CMyComBSTR
+{
+public:
+  BSTR m_str;
+  CMyComBSTR() { m_str = NULL; }
+  CMyComBSTR(LPCOLESTR pSrc) {  m_str = ::SysAllocString(pSrc);  }
+  // CMyComBSTR(int nSize) { m_str = ::SysAllocStringLen(NULL, nSize); }
+  // CMyComBSTR(int nSize, LPCOLESTR sz) { m_str = ::SysAllocStringLen(sz, nSize);  }
+  CMyComBSTR(const CMyComBSTR& src) { m_str = src.MyCopy(); }
+  /*
+  CMyComBSTR(REFGUID src)
+  {
+    LPOLESTR szGuid;
+    StringFromCLSID(src, &szGuid);
+    m_str = ::SysAllocString(szGuid);
+    CoTaskMemFree(szGuid);
+  }
+  */
+  ~CMyComBSTR() { ::SysFreeString(m_str); }
+  CMyComBSTR& operator=(const CMyComBSTR& src)
+  {
+    if (m_str != src.m_str)
+    {
+      if (m_str)
+        ::SysFreeString(m_str);
+      m_str = src.MyCopy();
+    }
+    return *this;
+  }
+  CMyComBSTR& operator=(LPCOLESTR pSrc)
+  {
+    ::SysFreeString(m_str);
+    m_str = ::SysAllocString(pSrc);
+    return *this;
+  }
+  unsigned int Length() const { return ::SysStringLen(m_str); }
+  operator BSTR() const { return m_str; }
+  BSTR* operator&() { return &m_str; }
+  BSTR MyCopy() const 
+  { 
+    int byteLen = ::SysStringByteLen(m_str);
+    BSTR res = ::SysAllocStringByteLen(NULL, byteLen);
+    memmove(res, m_str, byteLen);
+    return res;
+  }
+  void Attach(BSTR src) {  m_str = src; }
+  BSTR Detach()
+  {
+    BSTR s = m_str;
+    m_str = NULL;
+    return s;
+  }
+  void Empty()
+  {
+    ::SysFreeString(m_str);
+    m_str = NULL;
+  }
+  bool operator!() const {  return (m_str == NULL); }
+};
+
+
+//////////////////////////////////////////////////////////
+
+class CMyUnknownImp
+{
+public:
+  ULONG __m_RefCount;
+  CMyUnknownImp(): __m_RefCount(0) {}
+};
+
+#define MY_QUERYINTERFACE_BEGIN STDMETHOD(QueryInterface) \
+    (REFGUID iid, void **outObject) { 
+
+#define MY_QUERYINTERFACE_ENTRY(i) if (iid == IID_ ## i) \
+    { *outObject = (void *)(i *)this; AddRef(); return S_OK; }
+
+#define MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) if (iid == IID_IUnknown) \
+    { *outObject = (void *)(IUnknown *)(i *)this; AddRef(); return S_OK; }
+
+#define MY_QUERYINTERFACE_BEGIN2(i) MY_QUERYINTERFACE_BEGIN \
+    MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) \
+    MY_QUERYINTERFACE_ENTRY(i)
+
+#define MY_QUERYINTERFACE_END return E_NOINTERFACE; }
+
+#define MY_ADDREF_RELEASE \
+STDMETHOD_(ULONG, AddRef)() { return ++__m_RefCount; } \
+STDMETHOD_(ULONG, Release)() { if (--__m_RefCount != 0)  \
+  return __m_RefCount; delete this; return 0; }
+
+#define MY_UNKNOWN_IMP_SPEC(i) \
+  MY_QUERYINTERFACE_BEGIN \
+  i \
+  MY_QUERYINTERFACE_END \
+  MY_ADDREF_RELEASE
+
+
+#define MY_UNKNOWN_IMP MY_QUERYINTERFACE_BEGIN \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(IUnknown) \
+  MY_QUERYINTERFACE_END \
+  MY_ADDREF_RELEASE
+
+#define MY_UNKNOWN_IMP1(i) MY_UNKNOWN_IMP_SPEC( \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(i) \
+  MY_QUERYINTERFACE_ENTRY(i) \
+  )
+
+#define MY_UNKNOWN_IMP2(i1, i2) MY_UNKNOWN_IMP_SPEC( \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
+  MY_QUERYINTERFACE_ENTRY(i1) \
+  MY_QUERYINTERFACE_ENTRY(i2) \
+  )
+
+#define MY_UNKNOWN_IMP3(i1, i2, i3) MY_UNKNOWN_IMP_SPEC( \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
+  MY_QUERYINTERFACE_ENTRY(i1) \
+  MY_QUERYINTERFACE_ENTRY(i2) \
+  MY_QUERYINTERFACE_ENTRY(i3) \
+  )
+
+#define MY_UNKNOWN_IMP4(i1, i2, i3, i4) MY_UNKNOWN_IMP_SPEC( \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
+  MY_QUERYINTERFACE_ENTRY(i1) \
+  MY_QUERYINTERFACE_ENTRY(i2) \
+  MY_QUERYINTERFACE_ENTRY(i3) \
+  MY_QUERYINTERFACE_ENTRY(i4) \
+  )
+
+#define MY_UNKNOWN_IMP5(i1, i2, i3, i4, i5) MY_UNKNOWN_IMP_SPEC( \
+  MY_QUERYINTERFACE_ENTRY_UNKNOWN(i1) \
+  MY_QUERYINTERFACE_ENTRY(i1) \
+  MY_QUERYINTERFACE_ENTRY(i2) \
+  MY_QUERYINTERFACE_ENTRY(i3) \
+  MY_QUERYINTERFACE_ENTRY(i4) \
+  MY_QUERYINTERFACE_ENTRY(i5) \
+  )
+
+#endif