[svn-r23495] ported revisions 23433:23494 from the trunk

2 files changed, 40 insertions, 3 deletions

diff --git a/c++/src/H5Location.cpp b/c++/src/H5Location.cpp
index b93cd86..98878d7 100644
--- a/c++/src/H5Location.cpp
+++ b/c++/src/H5Location.cpp
@@ -250,6 +250,39 @@ int H5Location::getNumAttrs() const
 }
 
 //--------------------------------------------------------------------------
+// Function:	H5Location::attrExists
+///\brief	Checks whether the named attribute exists at this location.
+///\param	name - IN: Name of the attribute to be queried
+///\exception	H5::AttributeIException
+// Programmer	Binh-Minh Ribler - 2013
+//--------------------------------------------------------------------------
+bool H5Location::attrExists(const char* name) const
+{
+   // Call C routine H5Aexists to determine whether an attribute exists
+   // at this location, which could be specified by a file, group, dataset,
+   // or named datatype.
+   herr_t ret_value = H5Aexists(getId(), name);
+   if( ret_value > 0 )
+      return true;
+   else if(ret_value == 0)
+      return false;
+   else // Raise exception when H5Aexists returns a negative value
+      throw AttributeIException(inMemFunc("attrExists"), "H5Aexists failed");
+}
+
+//--------------------------------------------------------------------------
+// Function:	H5Location::attrExists
+///\brief	This is an overloaded member function, provided for convenience.
+///		It differs from the above function in that it takes
+///		a reference to an \c H5std_string for \a name.
+// Programmer	Binh-Minh Ribler - 2000
+//--------------------------------------------------------------------------
+bool H5Location::attrExists(const H5std_string& name) const
+{
+   return(attrExists(name.c_str()));
+}
+
+//--------------------------------------------------------------------------
 // Function:	H5Location::removeAttr
 ///\brief	Removes the named attribute from this object.
 ///\param	name - IN: Name of the attribute to be removed
diff --git a/c++/src/H5Location.h b/c++/src/H5Location.h
index d1dd892..8eae454 100644
--- a/c++/src/H5Location.h
+++ b/c++/src/H5Location.h
@@ -79,11 +79,15 @@ class H5_DLLCPP H5Location : public IdComponent {
 	// misleading, so getRefObjType is used in the new function instead.
 
 	// Iterate user's function over the attributes at this location.
-	int iterateAttrs( attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL );
+	int iterateAttrs(attr_operator_t user_op, unsigned* idx = NULL, void* op_data = NULL);
+
+	// Checks whether the named attribute exists at this location.
+	bool attrExists(const char* name) const;
+	bool attrExists(const H5std_string& name) const;
 
 	// Removes the named attribute from this location.
-	void removeAttr( const char* name ) const;
-	void removeAttr( const H5std_string& name ) const;
+	void removeAttr(const char* name) const;
+	void removeAttr(const H5std_string& name) const;
 
 	// Renames the named attribute to a new name.
 	void renameAttr(const char* oldname, const char* newname) const;