[vala/wip/transform: 64/140] Serialize structs

[Rico Tzschichholz <ricotz src gnome org>]

commit 094b20a3588fca78d368f5519b3688f4b09ba0d2
Author: Luca Bruno <lucabru src gnome org>
Date:   Fri Dec 30 10:53:58 2011 +0100

    Serialize structs

 codegen/valagvarianttransformer.vala | 53 +++++++++++++++++++++++++++++++-----
 1 file changed, 46 insertions(+), 7 deletions(-)
---
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index d1f337a54..211117b81 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -151,8 +151,14 @@ public class Vala.GVariantTransformer : CodeTransformer {
                }
        }
 
+       DataType copy_type (DataType type, bool value_owned) {
+               var ret = type.copy ();
+               ret.value_owned = value_owned;
+               return ret;
+       }
+
        Expression serialize_array (ArrayType array_type, Expression array_expr) {
-               string temp = b.add_temp_declaration (array_type, null);
+               string temp = b.add_temp_declaration (array_type, array_expr);
 
                string[] indices = new string[array_type.rank];
                for (int dim=1; dim <= array_type.rank; dim++) {
@@ -186,25 +192,58 @@ public class Vala.GVariantTransformer : CodeTransformer {
                        for (int i=0; i < dim; i++) {
                                element_expr.append_index (expression (indices[i]));
                        }
-                       element_variant = serialize_expression (array_type.element_type, element_expr);
+                       element_variant = serialize_expression (copy_type (array_type.element_type, false), 
element_expr);
                }
 
-               var builder_add = new MethodCall (expression (builder+".add_value"), b.source_reference);
+               var builder_add = (MethodCall) expression (builder+".add_value ()");
                builder_add.add_argument (element_variant);
                b.add_expression (builder_add);
                b.close ();
 
-               var builder_end = new MethodCall (expression (builder+".end"), b.source_reference);
-               return builder_end;
+               return (MethodCall) expression (builder+".end ()");
+       }
+
+       Expression serialize_struct (Struct st, Expression expr) {
+               string temp = b.add_temp_declaration (expr.value_type, expr);
+
+               var builderinit = expression ("new GLib.VariantBuilder (GLib.VariantType.TUPLE)");
+               var builder = b.add_temp_declaration (null, builderinit);
+
+               bool field_found = false;
+
+               foreach (Field f in st.get_fields ()) {
+                       if (f.binding != MemberBinding.INSTANCE) {
+                               continue;
+                       }
+
+                       field_found = true;
+
+                       var serialized_field = serialize_expression (copy_type (f.variable_type, false), 
expression (@"$temp.$(f.name)"));
+                       MethodCall call = (MethodCall) expression (@"$builder.add_value ()");
+                       call.add_argument (serialized_field);
+                       b.add_expression (call);
+               }
+
+               if (!field_found) {
+                       return null;
+               }
+
+               return expression (@"$builder.end ()");
        }
 
        Expression? serialize_expression (DataType type, Expression expr) {
+               if (type.data_type == context.analyzer.gvariant_type.data_type) {
+                       return expr;
+               }
+
                BasicTypeInfo basic_type;
                Expression result = null;
                if (get_basic_type_info (get_type_signature (type), out basic_type)) {
                        result = serialize_basic (basic_type, expr);
-               } else if (expr.value_type is ArrayType) {
-                       result = serialize_array ((ArrayType) expr.value_type, expr);
+               } else if (type is ArrayType) {
+                       result = serialize_array ((ArrayType) type, expr);
+               } else if (type.data_type is Struct) {
+                       result = serialize_struct ((Struct) type.data_type, expr);
                }
                return result;
        }