virtualx-engine/thirdparty/misc/patches/clipper-exceptions.patch

diff --git a/thirdparty/misc/clipper.cpp b/thirdparty/misc/clipper.cpp
index 8c3a59c4ca..c67045d113 100644
--- a/thirdparty/misc/clipper.cpp
+++ b/thirdparty/misc/clipper.cpp
@@ -48,6 +48,38 @@
 #include <ostream>
 #include <functional>
 
+//Explicitly disables exceptions handling for target platform
+//#define CLIPPER_NOEXCEPTION
+
+#define CLIPPER_THROW(exception) std::abort()
+#define CLIPPER_TRY if(true)
+#define CLIPPER_CATCH(exception) if(false)
+
+#if defined(__cpp_exceptions) || defined(__EXCEPTIONS) || defined(_CPPUNWIND)
+  #ifndef CLIPPER_NOEXCEPTION
+    #undef CLIPPER_THROW
+    #define CLIPPER_THROW(exception) throw exception
+    #undef CLIPPER_TRY
+    #define CLIPPER_TRY try
+    #undef CLIPPER_CATCH
+    #define CLIPPER_CATCH(exception) catch(exception)
+  #endif
+#endif
+
+//Optionally allows to override exception macros
+#if defined(CLIPPER_THROW_USER)
+	#undef CLIPPER_THROW
+	#define CLIPPER_THROW CLIPPER_THROW_USER
+#endif
+#if defined(CLIPPER_TRY_USER)
+	#undef CLIPPER_TRY
+	#define CLIPPER_TRY CLIPPER_TRY_USER
+#endif
+#if defined(CLIPPER_CATCH_USER)
+	#undef CLIPPER_CATCH
+	#define CLIPPER_CATCH CLIPPER_CATCH_USER
+#endif
+
 namespace ClipperLib {
 
 static double const pi = 3.141592653589793238;
@@ -898,7 +930,7 @@ void RangeTest(const IntPoint& Pt, bool& useFullRange)
   if (useFullRange)
   {
     if (Pt.X > hiRange || Pt.Y > hiRange || -Pt.X > hiRange || -Pt.Y > hiRange) 
-      throw clipperException("Coordinate outside allowed range");
+      CLIPPER_THROW(clipperException("Coordinate outside allowed range"));
   }
   else if (Pt.X > loRange|| Pt.Y > loRange || -Pt.X > loRange || -Pt.Y > loRange) 
   {
@@ -1046,10 +1078,10 @@ bool ClipperBase::AddPath(const Path &pg, PolyType PolyTyp, bool Closed)
 {
 #ifdef use_lines
   if (!Closed && PolyTyp == ptClip)
-    throw clipperException("AddPath: Open paths must be subject.");
+    CLIPPER_THROW(clipperException("AddPath: Open paths must be subject."));
 #else
   if (!Closed)
-    throw clipperException("AddPath: Open paths have been disabled.");
+    CLIPPER_THROW(clipperException("AddPath: Open paths have been disabled."));
 #endif
 
   int highI = (int)pg.size() -1;
@@ -1062,7 +1094,7 @@ bool ClipperBase::AddPath(const Path &pg, PolyType PolyTyp, bool Closed)
 
   bool IsFlat = true;
   //1. Basic (first) edge initialization ...
-  try
+  CLIPPER_TRY
   {
     edges[1].Curr = pg[1];
     RangeTest(pg[0], m_UseFullRange);
@@ -1075,10 +1107,10 @@ bool ClipperBase::AddPath(const Path &pg, PolyType PolyTyp, bool Closed)
       InitEdge(&edges[i], &edges[i+1], &edges[i-1], pg[i]);
     }
   }
-  catch(...)
+  CLIPPER_CATCH(...)
   {
     delete [] edges;
-    throw; //range test fails
+    CLIPPER_THROW(); //range test fails
   }
   TEdge *eStart = &edges[0];
 
@@ -1442,7 +1474,7 @@ void ClipperBase::SwapPositionsInAEL(TEdge *Edge1, TEdge *Edge2)
 void ClipperBase::UpdateEdgeIntoAEL(TEdge *&e)
 {
   if (!e->NextInLML) 
-    throw clipperException("UpdateEdgeIntoAEL: invalid call");
+    CLIPPER_THROW(clipperException("UpdateEdgeIntoAEL: invalid call"));
 
   e->NextInLML->OutIdx = e->OutIdx;
   TEdge* AelPrev = e->PrevInAEL;
@@ -1510,7 +1542,7 @@ bool Clipper::Execute(ClipType clipType, Paths &solution,
 {
   if( m_ExecuteLocked ) return false;
   if (m_HasOpenPaths)
-    throw clipperException("Error: PolyTree struct is needed for open path clipping.");
+    CLIPPER_THROW(clipperException("Error: PolyTree struct is needed for open path clipping."));
   m_ExecuteLocked = true;
   solution.resize(0);
   m_SubjFillType = subjFillType;
@@ -1560,7 +1592,7 @@ void Clipper::FixHoleLinkage(OutRec &outrec)
 bool Clipper::ExecuteInternal()
 {
   bool succeeded = true;
-  try {
+  CLIPPER_TRY {
     Reset();
     m_Maxima = MaximaList();
     m_SortedEdges = 0;
@@ -1583,7 +1615,7 @@ bool Clipper::ExecuteInternal()
       InsertLocalMinimaIntoAEL(botY);
     }
   }
-  catch(...) 
+  CLIPPER_CATCH(...) 
   {
     succeeded = false;
   }
@@ -2827,18 +2859,18 @@ void Clipper::ProcessHorizontal(TEdge *horzEdge)
 bool Clipper::ProcessIntersections(const cInt topY)
 {
   if( !m_ActiveEdges ) return true;
-  try {
+  CLIPPER_TRY {
     BuildIntersectList(topY);
     size_t IlSize = m_IntersectList.size();
     if (IlSize == 0) return true;
     if (IlSize == 1 || FixupIntersectionOrder()) ProcessIntersectList();
     else return false;
   }
-  catch(...) 
+  CLIPPER_CATCH(...) 
   {
     m_SortedEdges = 0;
     DisposeIntersectNodes();
-    throw clipperException("ProcessIntersections error");
+    CLIPPER_THROW(clipperException("ProcessIntersections error"));
   }
   m_SortedEdges = 0;
   return true;
@@ -3002,7 +3034,7 @@ void Clipper::DoMaxima(TEdge *e)
     DeleteFromAEL(eMaxPair);
   } 
 #endif
-  else throw clipperException("DoMaxima error");
+  else CLIPPER_THROW(clipperException("DoMaxima error"));
 }
 //------------------------------------------------------------------------------