[vala/wip/transform: 19/87] Deserialize arrays

[Rico Tzschichholz <ricotz src gnome org>]

commit 87b16f39bbe40c04b1ad75e8fe542266370a99e3
Author: Luca Bruno <lucabru src gnome org>
Date:   Fri Dec 30 17:31:40 2011 +0100

    Deserialize arrays

 codegen/valagvarianttransformer.vala | 76 ++++++++++++++++++++++++++++++++++++
 1 file changed, 76 insertions(+)
---
diff --git a/codegen/valagvarianttransformer.vala b/codegen/valagvarianttransformer.vala
index 8e8d7e98c..c041b4d6a 100644
--- a/codegen/valagvarianttransformer.vala
+++ b/codegen/valagvarianttransformer.vala
@@ -274,15 +274,91 @@ public class Vala.GVariantTransformer : CodeTransformer {
                return new MethodCall (new MemberAccess (expr, "get_" + basic_type.type_name, 
b.source_reference), b.source_reference);
        }
 
+       Expression deserialize_array (ArrayType array_type, Expression expr) {
+               var variant = b.add_temp_declaration (data_type ("GLib.Variant", true), null);
+               var iterator = b.add_temp_declaration (data_type ("GLib.VariantIter", true), null);
+               b.add_assignment (expression (variant), expr);
+               b.add_assignment (expression (iterator), expression (@"$variant.iterator ()"));
+
+               var array_new = new ArrayCreationExpression (array_type.element_type, array_type.rank, null, 
b.source_reference);
+               var array = b.add_temp_declaration (copy_type (array_type, true), null);
+
+               string[] indices = new string[array_type.rank];
+               for (int dim=1; dim <= array_type.rank; dim++) {
+                       string length = b.add_temp_declaration (data_type ("size_t", true), null);
+                       b.add_assignment (expression (length), expression (@"$iterator.n_children ()"));
+                       array_new.append_size (expression (length));
+                       indices[dim-1] = b.add_temp_declaration (null, expression ("0"));
+                       if (dim < array_type.rank) {
+                               b.add_expression (expression (@"$iterator.next_value ()"));
+                       }
+               }
+               b.add_assignment (expression (array), array_new);
+
+               deserialize_array_dim (array_type, variant, indices, 1, array);
+               return expression (array);
+       }
+
+       void deserialize_array_dim (ArrayType array_type, string variant, string[] indices, int dim, string 
array) {
+               var iter = b.add_temp_declaration (data_type ("GLib.VariantIter", true), null);
+               b.add_assignment (expression (iter), expression (@"$variant.iterator ()"));
+               var new_variant = b.add_temp_declaration (data_type ("GLib.Variant", true), null);
+               b.open_while (expression (@"($new_variant = $iter.next_value ()) != null"));
+
+               if (dim == array_type.rank) {
+                       var element_access = new ElementAccess (expression (array), b.source_reference);
+                       for (int i=0; i < array_type.rank; i++) {
+                               element_access.append_index (expression (indices[i]));
+                       }
+                       b.add_assignment (element_access, deserialize_expression (array_type.element_type, 
expression (new_variant)));
+               } else {
+                       deserialize_array_dim (array_type, new_variant, indices, dim + 1, array);
+               }
+
+               b.close ();
+       }
+
        Expression? deserialize_expression (DataType type, Expression expr) {
                BasicTypeInfo basic_type;
                Expression result = null;
                if (get_basic_type_info (get_type_signature (type), out basic_type)) {
                        result = deserialize_basic (basic_type, expr);
+               } else if (type is ArrayType) {
+                       result = deserialize_array ((ArrayType) type, expr);
                }
                return result;
        }
 
+       Symbol symbol_from_string (string symbol_string) {
+               Symbol sym = context.root;
+               foreach (unowned string s in symbol_string.split (".")) {
+                       sym = sym.scope.lookup (s);
+               }
+               return sym;
+       }
+
+       DataType data_type (string s, bool owned_by_default) {
+               DataType type;
+               if (owned_by_default) {
+                       if (s.has_prefix ("unowned ")) {
+                               type = context.analyzer.get_data_type_for_symbol ((TypeSymbol) 
symbol_from_string (s.split (" ")[1]));
+                               type.value_owned = false;
+                       } else {
+                               type = context.analyzer.get_data_type_for_symbol ((TypeSymbol) 
symbol_from_string (s));
+                               type.value_owned = true;
+                       }
+               } else {
+                       if (s.has_prefix ("owned ")) {
+                               type = context.analyzer.get_data_type_for_symbol ((TypeSymbol) 
symbol_from_string (s.split (" ")[1]));
+                               type.value_owned = true;
+                       } else {
+                               type = context.analyzer.get_data_type_for_symbol ((TypeSymbol) 
symbol_from_string (s));
+                               type.value_owned = false;
+                       }
+               }
+               return type;
+       }
+
        public override void visit_cast_expression (CastExpression expr) {
                base.visit_cast_expression (expr);