added a Free method

Source/cmCPluginAPI.cxx

@@ -380,6 +380,12 @@ void * cmCreateSourceFile()
   return (void *)(new cmSourceFile);
 }
 
+void cmDestroySourceFile(void *arg)
+{
+  cmSourceFile *sf = static_cast<cmSourceFile *>(arg);
+  delete sf;
+}
+
 const char *cmSourceFileGetSourceName(void *arg)
 {
   cmSourceFile *sf = static_cast<cmSourceFile *>(arg);
@@ -479,6 +485,11 @@ void cmRemoveFile(const char *name)
   cmSystemTools::RemoveFile(name);
 }
 
+void cmFree(void *data)
+{
+  free(data);
+}
+
 } // close the extern "C" scope
 
 cmCAPI cmStaticCAPI =
@@ -517,6 +528,7 @@ cmCAPI cmStaticCAPI =
   
   cmAddSource,
   cmCreateSourceFile,
+  cmDestroySourceFile,
   cmGetSource,
   cmSourceFileAddDepend,
   cmSourceFileGetProperty,
@@ -532,5 +544,6 @@ cmCAPI cmStaticCAPI =
   cmGetFilenameWithoutExtension,
   cmGetFilenamePath,
   cmRemoveFile,
+  cmFree,
 };
 

Source/cmCPluginAPI.h

@@ -113,6 +113,7 @@ typedef struct
   =========================================================================*/
   void *(*AddSource) (void *mf, void *sf); 
   void *(*CreateSourceFile) ();
+  void  (*DestroySourceFile) (void *sf);
   void *(*GetSource) (void *mf, const char* sourceName);
   void  (*SourceFileAddDepend) (void *sf, const char *depend);
   const char *(*SourceFileGetProperty) (void *sf, const char *prop);
@@ -132,13 +133,14 @@ typedef struct
   
   /*=========================================================================
   The following methods are from cmSystemTools.h see that file for specific
-  documentaiton on each method.
+  documentation on each method.
   =========================================================================*/
   char  *(*Capitalized)(const char *);
   void   (*CopyFileIfDifferent)(const char *f1, const char *f2);
   char  *(*GetFilenameWithoutExtension)(const char *);
   char  *(*GetFilenamePath)(const char *);
   void   (*RemoveFile)(const char *f1);
+  void   (*Free)(void *);
   
   /* this is the end of the C function stub API structure */ 
 } cmCAPI;