[vala] dova: Make methods equals, hash, and to_string null-safe

[Jürg Billeter <juergbi src gnome org>]

commit e6454b8edf555ecb002b324339e02d272ca1a2cb
Author: Jürg Billeter <j bitron ch>
Date:   Fri Jul 23 11:33:23 2010 +0200

    dova: Make methods equals, hash, and to_string null-safe

 codegen/valadovaobjectmodule.vala |   19 +++++++++++++++++++
 1 files changed, 19 insertions(+), 0 deletions(-)
---
diff --git a/codegen/valadovaobjectmodule.vala b/codegen/valadovaobjectmodule.vala
index e4e4761..44e07ce 100644
--- a/codegen/valadovaobjectmodule.vala
+++ b/codegen/valadovaobjectmodule.vala
@@ -1459,6 +1459,25 @@ internal class Vala.DovaObjectModule : DovaArrayModule {
 				vfunc.add_parameter (new CCodeFormalParameter ("result", "void *"));
 			}
 
+			if (m.get_full_name () == "any.equals") {
+				// make this null-safe
+				var null_block = new CCodeBlock ();
+				null_block.add_statement (new CCodeReturnStatement (new CCodeUnaryExpression (CCodeUnaryOperator.LOGICAL_NEGATION, new CCodeIdentifier ("other"))));
+				vfunc.block.add_statement (new CCodeIfStatement (new CCodeUnaryExpression (CCodeUnaryOperator.LOGICAL_NEGATION, new CCodeIdentifier ("this")), null_block));
+			} else if (m.get_full_name () == "any.hash") {
+				// make this null-safe
+				var null_block = new CCodeBlock ();
+				null_block.add_statement (new CCodeReturnStatement (new CCodeConstant ("0")));
+				vfunc.block.add_statement (new CCodeIfStatement (new CCodeUnaryExpression (CCodeUnaryOperator.LOGICAL_NEGATION, new CCodeIdentifier ("this")), null_block));
+			} else if (m.get_full_name () == "any.to_string") {
+				// make this null-safe
+				var null_string = new CCodeFunctionCall (new CCodeIdentifier ("string_create_from_cstring"));
+				null_string.add_argument (new CCodeConstant ("\"(null)\""));
+				var null_block = new CCodeBlock ();
+				null_block.add_statement (new CCodeReturnStatement (null_string));
+				vfunc.block.add_statement (new CCodeIfStatement (new CCodeUnaryExpression (CCodeUnaryOperator.LOGICAL_NEGATION, new CCodeIdentifier ("this")), null_block));
+			}
+
 			var vcast = get_type_private_from_type ((ObjectTypeSymbol) m.parent_symbol, get_type_from_instance (new CCodeIdentifier ("this")));
 
 			var vcall = new CCodeFunctionCall (new CCodeMemberAccess.pointer (vcast, m.vfunc_name));