source: issm/oecreview/Archive/12321-12677/ISSM-12446-12447.diff

u/astrid-r1b/morlighe/issmuci/trunk-jpl/../trunk-jpl/src/c/shared/Alloc/xNewDelete.h

@@ -58 +58 @@
 }
 
 template <class T> 
-T* xReNew(T* old, unsigned int size) {
+T* xReNew(T* old, unsigned int old_size, unsigned int size) {
 #ifdef USE_CXX_MEMORY_MANAGMENT_FOR_NON_POD_TYPES
-  assert(old);
-  T* aT_p=xNew<T>(size);
-  for (unsigned int i=0; i<size;++i) 
-    aT_p[i]=old[i];
-  xDelete<T>(old);
+  T* aT_p=NULL;
+  if (!old) { // no old memory
+    if (size)  
+      aT_p=xNew<T>(size);
+  }
+  else { // have old memory
+    if (!size)  // but 0 size
+      xDelete<T>(old);
+    else { // non-zero size
+      if (size>old_size) { // do something only if it is bigger
+        aT_p=xNew<T>(size);
+        for (unsigned int i=0; i<old_size;++i) 
+          aT_p[i]=old[i]; // copy the items
+        xDelete<T>(old);
+      }
+      else // size is equal or less than old size
+        aT_p=old; // do nothing
+    }
+  }
   return aT_p;
 #else 
   T* aT_p=(T*)realloc((void*)old,size*sizeof(T));

u/astrid-r1b/morlighe/issmuci/trunk-jpl/../trunk-jpl/src/c/shared/TriMesh/TriMeshUtils.cpp

@@ -65 +65 @@
                                 }
                                 else{
                                         /*Reallocate another max_number_elements slots in the GridElements: */
-                                        GridElementsRealloc=xReNew<int>(GridElements,(current_size+max_number_elements));
+                                        GridElementsRealloc=xReNew<int>(GridElements,current_size,(current_size+max_number_elements));
                                         if (!GridElementsRealloc){
                                                 noerr=0;
                                                 goto cleanup_and_return;