UTL STL container descriptor checks

The vector of pointers (just fixed) were not working correctly because the
descriptors returned from swig::type_info() were sometimes returning
zero. Zero should only be used for void * as the subsequent call to
SWIG_ConvertPtr will blindly cast the pointer without checking
descriptor.

std::vector<void *> does not work and will require further changes:
specializing traits_info<void *> to return 0 and traits_asptr<void *>.
I tried this and traits_asptr<void> also needs to be added in which
seems odd and requires further investigation...

Lib/python/pystdcommon.swg:
  template <> struct traits_info<void *> {
    static swig_type_info *type_info() {
      static swig_type_info *info = 0;
    }
  };

Lib/std/std_common.i:
  template <>
  struct traits_asptr<void *> {
    static int asptr(PyObject *obj, void ***val) {
      void **p;
      swig_type_info *descriptor = 0;
      int res = SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0);
      if (SWIG_IsOK(res)) {
	if (val) *val = p;
      }
      return res;
    }
  };

  // this is needed, but am not sure this is expected
  template <>
  struct traits_asptr<void> {
    static int asptr(PyObject *obj, void **val) {
      void **p;
      swig_type_info *descriptor = 0;
      int res = SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0);
      if (SWIG_IsOK(res)) {
	if (val) *val = p;
      }
      return res;
    }
  };

18 files changed, 53 insertions, 41 deletions

diff --git a/Lib/octave/octcontainer.swg b/Lib/octave/octcontainer.swg
index 0211b33c6..af58f3aaa 100644
--- a/Lib/octave/octcontainer.swg
+++ b/Lib/octave/octcontainer.swg
@@ -562,8 +562,8 @@ namespace swig {
     static int asptr(const octave_value& obj, sequence **seq) {
       if (!obj.is_defined() || Swig::swig_value_deref(obj)) {
 	sequence *p;
-	if (SWIG_ConvertPtr(obj,(void**)&p,
-			    swig::type_info<sequence>(),0) == SWIG_OK) {
+	swig_type_info *descriptor = swig::type_info<sequence>();
+	if (descriptor && SWIG_IsOK(SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0))) {
 	  if (seq) *seq = p;
 	  return SWIG_OLDOBJ;
 	}
diff --git a/Lib/octave/octstdcommon.swg b/Lib/octave/octstdcommon.swg
index 96923f40a..799d369a7 100644
--- a/Lib/octave/octstdcommon.swg
+++ b/Lib/octave/octstdcommon.swg
@@ -42,7 +42,8 @@ namespace swig {
   struct traits_asptr {   
     static int asptr(const octave_value& obj, Type **val) {
       Type *p;
-      int res = SWIG_ConvertPtr(obj, (void**)&p, type_info<Type>(), 0);
+      swig_type_info *descriptor = type_info<Type>();
+      int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
       if (SWIG_IsOK(res)) {
 	if (val) *val = p;
       }
diff --git a/Lib/octave/std_map.i b/Lib/octave/std_map.i
index 7b85a548e..fd15661c3 100644
--- a/Lib/octave/std_map.i
+++ b/Lib/octave/std_map.i
@@ -98,7 +98,8 @@
 	  res = traits_asptr_stdseq<std::map<K,T>, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  map_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<map_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<map_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/octave/std_pair.i b/Lib/octave/std_pair.i
index ab028d144..a06498bf2 100644
--- a/Lib/octave/std_pair.i
+++ b/Lib/octave/std_pair.i
@@ -47,7 +47,8 @@
 	  return get_pair(c(0),c(1),val);
 	} else {
 	  value_type *p;
-	  int res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)
 	    *val = *p;
 	  return res;
@@ -100,7 +101,8 @@
 	  return get_pair(c(0),c(1),val);
 	} else {
 	  value_type *p;
-	  int res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)
 	    *val = p;
 	  return res;
diff --git a/Lib/python/pycontainer.swg b/Lib/python/pycontainer.swg
index 46d04388b..4621c1b34 100644
--- a/Lib/python/pycontainer.swg
+++ b/Lib/python/pycontainer.swg
@@ -968,8 +968,8 @@ namespace swig {
     static int asptr(PyObject *obj, sequence **seq) {
       if (obj == Py_None || SWIG_Python_GetSwigThis(obj)) {
 	sequence *p;
-	if (::SWIG_ConvertPtr(obj,(void**)&p,
-			      swig::type_info<sequence>(),0) == SWIG_OK) {
+	swig_type_info *descriptor = swig::type_info<sequence>();
+	if (descriptor && SWIG_IsOK(::SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0))) {
 	  if (seq) *seq = p;
 	  return SWIG_OLDOBJ;
 	}
diff --git a/Lib/python/pystdcommon.swg b/Lib/python/pystdcommon.swg
index 2af22e2a4..8372426a0 100644
--- a/Lib/python/pystdcommon.swg
+++ b/Lib/python/pystdcommon.swg
@@ -46,7 +46,8 @@ namespace swig {
   struct traits_asptr {   
     static int asptr(PyObject *obj, Type **val) {
       Type *p;
-      int res = SWIG_ConvertPtr(obj, (void**)&p, type_info<Type>(), 0);
+      swig_type_info *descriptor = type_info<Type>();
+      int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
       if (SWIG_IsOK(res)) {
 	if (val) *val = p;
       }
diff --git a/Lib/python/std_map.i b/Lib/python/std_map.i
index 65dd91d9c..f61f79c44 100644
--- a/Lib/python/std_map.i
+++ b/Lib/python/std_map.i
@@ -102,7 +102,8 @@
 	  res = traits_asptr_stdseq<map_type, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  map_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<map_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<map_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	SWIG_PYTHON_THREAD_END_BLOCK;
diff --git a/Lib/python/std_multimap.i b/Lib/python/std_multimap.i
index 2c539cf29..3209fb0f8 100644
--- a/Lib/python/std_multimap.i
+++ b/Lib/python/std_multimap.i
@@ -26,7 +26,8 @@
 	  return traits_asptr_stdseq<std::multimap<K,T>, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  multimap_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<multimap_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<multimap_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/python/std_pair.i b/Lib/python/std_pair.i
index 5694e7e09..da31918c8 100644
--- a/Lib/python/std_pair.i
+++ b/Lib/python/std_pair.i
@@ -48,7 +48,8 @@
 	  }
 	} else {
 	  value_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = *p;
 	}
 	return res;
@@ -98,7 +99,8 @@
 	  }
 	} else {
 	  value_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/python/std_unordered_map.i b/Lib/python/std_unordered_map.i
index f956f4fb3..97b48af70 100644
--- a/Lib/python/std_unordered_map.i
+++ b/Lib/python/std_unordered_map.i
@@ -29,7 +29,8 @@
 	  res = traits_asptr_stdseq<std::unordered_map<K,T>, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  unordered_map_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<unordered_map_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<unordered_map_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/python/std_unordered_multimap.i b/Lib/python/std_unordered_multimap.i
index b3b723637..aadd15515 100644
--- a/Lib/python/std_unordered_multimap.i
+++ b/Lib/python/std_unordered_multimap.i
@@ -26,7 +26,8 @@
 	  return traits_asptr_stdseq<std::unordered_multimap<K,T>, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  unordered_multimap_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<unordered_multimap_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<unordered_multimap_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/r/rstdcommon.swg b/Lib/r/rstdcommon.swg
index b11cf677b..e6c873a07 100644
--- a/Lib/r/rstdcommon.swg
+++ b/Lib/r/rstdcommon.swg
@@ -40,7 +40,8 @@ namespace swig {
   struct traits_asptr {   
     static int asptr(SWIG_Object obj, Type **val) {
       Type *p;
-      int res = SWIG_ConvertPtr(obj, (void**)&p, type_info<Type>(), 0);
+      swig_type_info *descriptor = type_info<Type>();
+      int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
       if (SWIG_IsOK(res)) {
 	if (val) *val = p;
       }
diff --git a/Lib/ruby/rubycontainer.swg b/Lib/ruby/rubycontainer.swg
index 2908ef7b7..a6d8a59ef 100644
--- a/Lib/ruby/rubycontainer.swg
+++ b/Lib/ruby/rubycontainer.swg
@@ -464,8 +464,7 @@ namespace swig
   %typemap(in,noblock=1,fragment="RubySequence_Cont")
     const_iterator(swig::ConstIterator *iter = 0, int res),
     const_reverse_iterator(swig::ConstIterator *iter = 0, int res) {
-    res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter),
-			  swig::ConstIterator::descriptor(), 0);
+    res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter), swig::ConstIterator::descriptor(), 0);
     if (!SWIG_IsOK(res) || !iter) {
       %argument_fail(SWIG_TypeError, "$type", $symname, $argnum);
     } else {
@@ -497,16 +496,14 @@ namespace swig
   %typecheck(%checkcode(ITERATOR),noblock=1,fragment="RubySequence_Cont")
     const_iterator, const_reverse_iterator {
     swig::ConstIterator *iter = 0;
-    int res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter), 
-			      swig::ConstIterator::descriptor(), 0);
+    int res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter), swig::ConstIterator::descriptor(), 0);
     $1 = (SWIG_IsOK(res) && iter && (dynamic_cast<swig::ConstIterator_T<$type > *>(iter) != 0));
   }
 
   %typecheck(%checkcode(ITERATOR),noblock=1,fragment="RubySequence_Cont")
     iterator, reverse_iterator {
     swig::ConstIterator *iter = 0;
-    int res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter), 
-			      swig::Iterator::descriptor(), 0);
+    int res = SWIG_ConvertPtr($input, %as_voidptrptr(&iter), swig::Iterator::descriptor(), 0);
     $1 = (SWIG_IsOK(res) && iter && (dynamic_cast<swig::Iterator_T<$type > *>(iter) != 0));
   }
 
@@ -1037,8 +1034,8 @@ namespace swig {
 	}
       } else {
 	sequence *p;
-	if (SWIG_ConvertPtr(obj,(void**)&p,
-			    swig::type_info<sequence>(),0) == SWIG_OK) {
+	swig_type_info *descriptor = swig::type_info<sequence>();
+	if (descriptor && SWIG_IsOK(SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0))) {
 	  if (seq) *seq = p;
 	  return SWIG_OLDOBJ;
 	}
@@ -1077,8 +1074,8 @@ namespace swig {
 	}
       } else {
 	sequence *p;
-	if (SWIG_ConvertPtr(obj,(void**)&p,
-			    swig::type_info<sequence>(),0) == SWIG_OK) {
+	swig_type_info *descriptor = swig::type_info<sequence>();
+	if (descriptor && SWIG_IsOK(SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0))) {
 	  if (seq) *seq = p;
 	  return SWIG_OLDOBJ;
 	}
diff --git a/Lib/ruby/rubystdcommon.swg b/Lib/ruby/rubystdcommon.swg
index b4ae3a3cc..f72745b56 100644
--- a/Lib/ruby/rubystdcommon.swg
+++ b/Lib/ruby/rubystdcommon.swg
@@ -53,7 +53,8 @@ namespace swig {
   struct traits_asptr {   
     static int asptr(VALUE obj, Type **val) {
       Type *p;
-      int res = SWIG_ConvertPtr(obj, (void**)&p, type_info<Type>(), 0);
+      swig_type_info *descriptor = type_info<Type>();
+      int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
       if (SWIG_IsOK(res)) {
 	if (val) *val = p;
       }
diff --git a/Lib/ruby/std_map.i b/Lib/ruby/std_map.i
index f706ca873..7077fa104 100644
--- a/Lib/ruby/std_map.i
+++ b/Lib/ruby/std_map.i
@@ -100,7 +100,8 @@
 	  res = traits_asptr_stdseq<std::map<K,T>, std::pair<K, T> >::asptr(items, val);
 	} else {
 	  map_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,swig::type_info<map_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<map_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/ruby/std_pair.i b/Lib/ruby/std_pair.i
index 5b4c8baf2..5bea67c7c 100644
--- a/Lib/ruby/std_pair.i
+++ b/Lib/ruby/std_pair.i
@@ -44,8 +44,8 @@
 	  }
 	} else {
 	  value_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,
-				swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = *p;
 	}
 	return res;
@@ -90,8 +90,8 @@
 	  }
 	} else {
 	  value_type *p;
-	  res = SWIG_ConvertPtr(obj,(void**)&p,
-				swig::type_info<value_type>(),0);
+	  swig_type_info *descriptor = swig::type_info<value_type>();
+	  res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
 	  if (SWIG_IsOK(res) && val)  *val = p;
 	}
 	return res;
diff --git a/Lib/scilab/scistdcommon.swg b/Lib/scilab/scistdcommon.swg
index 7fdc72212..63f3ca164 100644
--- a/Lib/scilab/scistdcommon.swg
+++ b/Lib/scilab/scistdcommon.swg
@@ -42,7 +42,8 @@ namespace swig {
   struct traits_asptr {
     static int asptr(const SwigSciObject& obj, Type **val) {
       Type *p;
-      int res = SWIG_ConvertPtr(obj, (void**)&p, type_info<Type>(), 0);
+      swig_type_info *descriptor = type_info<Type>();
+      int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&p, descriptor, 0) : SWIG_ERROR;
       if (SWIG_IsOK(res)) {
 	if (val) *val = p;
       }
diff --git a/Lib/typemaps/implicit.swg b/Lib/typemaps/implicit.swg
index 702fb52b8..2fc3108e7 100644
--- a/Lib/typemaps/implicit.swg
+++ b/Lib/typemaps/implicit.swg
@@ -73,8 +73,8 @@ namespace swig {
   typedef Type value_type;
   static int asptr(SWIG_Object obj, value_type **val) { 
     Type *vptr;
-    static swig_type_info* desc = SWIG_TypeQuery("Type *");
-    int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0);
+    static swig_type_info* descriptor = SWIG_TypeQuery("Type *");
+    int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&vptr, descriptor, 0) : SWIG_ERROR;
     if (SWIG_IsOK(res)) {
       if (val) *val = vptr;
       return res;
@@ -109,8 +109,8 @@ namespace swig {
   typedef Type value_type;
   static int asptr(SWIG_Object obj, value_type **val) { 
     Type *vptr;
-    static swig_type_info* desc = SWIG_TypeQuery("Type *");
-    int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0);
+    static swig_type_info* descriptor = SWIG_TypeQuery("Type *");
+    int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&vptr, descriptor, 0) : SWIG_ERROR;
     if (SWIG_IsOK(res)) {
       if (val) *val = vptr;
       return res;
@@ -147,8 +147,8 @@ namespace swig {
   typedef Type value_type;
   static int asptr(SWIG_Object obj, value_type **val) { 
     Type *vptr;
-    static swig_type_info* desc = SWIG_TypeQuery("Type *");
-    int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0);
+    static swig_type_info* descriptor = SWIG_TypeQuery("Type *");
+    int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&vptr, descriptor, 0) : SWIG_ERROR;
     if (SWIG_IsOK(res)) {
       if (val) *val = vptr;
       return SWIG_OLDOBJ;
@@ -188,8 +188,8 @@ namespace swig {
     typedef Type value_type;
     static int asptr(SWIG_Object obj, value_type **val) { 
     Type *vptr;
-    static swig_type_info* desc = SWIG_TypeQuery("Type *");
-    int res = SWIG_ConvertPtr(obj, (void **)&vptr, desc, 0);
+    static swig_type_info* descriptor = SWIG_TypeQuery("Type *");
+    int res = descriptor ? SWIG_ConvertPtr(obj, (void **)&vptr, descriptor, 0) : SWIG_ERROR;
     if (SWIG_IsOK(res)) {
       if (val) *val = vptr;
       return res;