Plugins (gforce): Fix type-punning errors.

Author: kaixiong

libvisual-plugins/plugins/actor/gforce/CMakeLists.txt

@@ -2,7 +2,7 @@ SET(GFORCE_SOURCE_DIR ${PROJECT_SOURCE_DIR}/plugins/actor/gforce)
 SET(GFORCE_DATA_DIR ${LV_PLUGIN_DATA_DIR}/actor/actor_gforce)
 
 SET(GFORCE_COMPILE_DEFS UNIX_X _REENTRANT)
-SET(GFORCE_COMPILE_OPTIONS -fno-strict-aliasing -Wno-unknown-warning-option -Wno-sometimes-uninitialized)
+SET(GFORCE_COMPILE_OPTIONS -Werror)
 
 # Required on GCC but not Clang for some reason.
 IF(NOT MINGW)

libvisual-plugins/plugins/actor/gforce/Common/GeneralTools/Headers/XFloatList.h

@@ -4,21 +4,35 @@
 // by Andrew O'Meara
 
 #include "XPtrList.h"
+#include <string.h>
 
 class XLongList;
 
+inline float void_ptr_to_float(const void* value)
+{
+    float result;
+    memcpy( &result, &value, sizeof( result ) );
+    return result;
+}
+
+inline void* float_to_void_ptr(float value)
+{
+    void* result = 0;
+    memcpy( &result, &value, sizeof( value ) );
+    return result;
+}
 
 class XFloatList {
 
 	public:
 		XFloatList( ListOrderingT inOrdering = cOrderNotImportant );		// See XPtrList.h for ListOrderingT choices
 
 		// See XPtrList.h for description of functions.
-		virtual long			Add( float inNum )								{ return mList.Add( *((void**) &inNum) );			}
+		virtual long			Add( float inNum )								{ return mList.Add( float_to_void_ptr( inNum ) );	}
 		virtual void			Add( const XFloatList& inList )					{ mList.Add( inList.mList );						}
 		virtual bool			RemoveElement( long inIndex )					{ return mList.RemoveElement( inIndex );			}
 		virtual void			RemoveAll()										{ mList.RemoveAll(); 								}
-		virtual float			Fetch( long inIndex )							{ long t = (long) mList.Fetch( inIndex ); return *((float*) &t);}
+		virtual float			Fetch( long inIndex )							{ return void_ptr_to_float( mList.Fetch( inIndex ) ); }
 		virtual bool			Fetch( long inIndex, float* ioPtrDest ) const	{ return mList.Fetch( inIndex, (void**)ioPtrDest );	}
 		virtual long			Count()	const									{ return mList.Count();								}
 
@@ -36,7 +50,7 @@ class XFloatList {
 		// Smoothes all the floats in this list
 		void					GaussSmooth( float inSigma );
 
-		float					operator[] ( const long inIndex )				{ long t = (long) mList.Fetch( inIndex ); return *((float*) &t); }
+		float					operator[] ( const long inIndex )				{ return void_ptr_to_float(mList.Fetch( inIndex )); }
 
 		// Generic utility fcn to gauss-smooth a 1D curve.
 		static void				GaussSmooth( float inSigma, long inN, float inSrceDest[] );

libvisual-plugins/plugins/actor/gforce/Common/GeneralTools/XFloatList.cpp

@@ -64,7 +64,7 @@ void XFloatList::FindMeans( long inNumMeans, float outMeans[], float inSigmaScal
 
 		// If this a local max.  (Note: this could/should be improved for neighbors that are equal)
 		if ( ( cen > left && cen >= right ) ) {
-			sepCandidates.Put( i, *((void**) &cen) );
+			sepCandidates.Put( i, float_to_void_ptr( cen ) );
 		}
 	}
 
@@ -284,7 +284,7 @@ void XFloatList::Rank( XLongList& outRank, long inNumToRank ) const {
 
 
 int XFloatList::sQSFloatComparitor( const void* inA, const void* inB ) {
-	float diff =  *((float*) inB) - *((float*) inA);
+	float diff =  void_ptr_to_float(inB) - void_ptr_to_float(inA);
 	if ( diff > 0.0 )
 		return 1;
 	else if ( diff < 0.0 )
@@ -296,7 +296,7 @@ int XFloatList::sQSFloatComparitor( const void* inA, const void* inB ) {
 
 
 int XFloatList::sFloatComparitor( const void* inA, const void* inB ) {
-	float diff =  *((float*) &inB) - *((float*) &inA);
+	float diff = void_ptr_to_float(inA) - void_ptr_to_float(inB);
 	if ( diff > 0.0 )
 		return 1;
 	else if ( diff < 0.0 )

libvisual-plugins/plugins/actor/gforce/Common/io/CEgIStream.cpp

@@ -1,6 +1,6 @@
 #include "CEgIStream.h"
-
-//#include <string.h>
+#include <stdint.h>
+#include <string.h>
 
 
 UtilStr CEgIStream::sTemp;
@@ -32,8 +32,20 @@ long CEgIStream::GetLong() {
 
 
 float CEgIStream::GetFloat() {
-	long v = GetLong();
-	return *( (float*) &v );
+	uint32_t c, n = GetByte();
+
+	c = GetByte();
+	n = n | ( c << 8 );
+
+	c = GetByte();
+	n = n | ( c << 16 );
+
+	c = GetByte();
+	n = n | ( c << 24 );
+
+	float result;
+	memcpy(&result, &n, sizeof(result));
+	return result;
 }
 
 

libvisual-plugins/plugins/actor/gforce/Common/math/ExprVirtualMachine.cpp

@@ -19,6 +19,7 @@
 #endif
 
 #include <libvisual/libvisual.h>
+#include <bit>
 #include <limits>
 #include <stdlib.h>
 
@@ -85,7 +86,7 @@ ExprUserFcn ExprVirtualMachine::sZeroFcn = { 0, { 0 } };
 							case cABS:	r = fabs( r );	break;		\
 							case cSIN:	r = sin( r );	break;		\
 							case cCOS:	r = cos( r );	break;		\
-							case cSEED: i = *((long*) &r);						\
+							case cSEED: i = std::bit_cast<int32_t>( r );		\
 										size = i % 31;							\
 										srand( ( i << size ) | ( i >> ( 32 - size ) )  ); 	break;				\
 							case cTAN:	r = tan( r );	break;		\