gobject/valaccodebinding.vala

   1 /* valaccodebinding.vala
   2  *
   3  * Copyright (C) 2007-2008  Jürg Billeter
   4  *
   5  * This library is free software; you can redistribute it and/or
   6  * modify it under the terms of the GNU Lesser General Public
   7  * License as published by the Free Software Foundation; either
   8  * version 2.1 of the License, or (at your option) any later version.
   9
  10  * This library is distributed in the hope that it will be useful,
  11  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  12  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  13  * Lesser General Public License for more details.
  14
  15  * You should have received a copy of the GNU Lesser General Public
  16  * License along with this library; if not, write to the Free Software
  17  * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301  USA
  18  *
  19  * Author:
  20  *      Jürg Billeter <j@bitron.ch>
  21  */
  22
  23 using GLib;
  24
  25 /**
  26  * The link between a source code node and generated code.
  27  */
  28 public abstract class Vala.CCodeBinding : CodeBinding {
  29         /**
  30          * The C Code generator.
  31          */
  32         public CCodeGenerator codegen { get; set; }
  33
  34         /**
  35          * Generate code for this source code node.
  36          */
  37         public virtual void emit () {
  38         }
  39
  40         public CCodeIdentifier get_value_setter_function (DataType type_reference) {
  41                 if (type_reference.data_type != null) {
  42                         return new CCodeIdentifier (type_reference.data_type.get_set_value_function ());
  43                 } else {
  44                         return new CCodeIdentifier ("g_value_set_pointer");
  45                 }
  46         }
  47
  48         public CCodeExpression get_construct_property_assignment (CCodeConstant canonical_cconstant, DataType property_type, CCodeExpression value) {
  49                 // this property is used as a construction parameter
  50                 var cpointer = new CCodeIdentifier ("__params_it");
  51
  52                 var ccomma = new CCodeCommaExpression ();
  53                 // set name in array for current parameter
  54                 var cnamemember = new CCodeMemberAccess.pointer (cpointer, "name");
  55                 var cnameassign = new CCodeAssignment (cnamemember, canonical_cconstant);
  56                 ccomma.append_expression (cnameassign);
  57
  58                 var gvaluearg = new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, new CCodeMemberAccess.pointer (cpointer, "value"));
  59
  60                 // initialize GValue in array for current parameter
  61                 var cvalueinit = new CCodeFunctionCall (new CCodeIdentifier ("g_value_init"));
  62                 cvalueinit.add_argument (gvaluearg);
  63                 cvalueinit.add_argument (new CCodeIdentifier (property_type.get_type_id ()));
  64                 ccomma.append_expression (cvalueinit);
  65
  66                 // set GValue for current parameter
  67                 var cvalueset = new CCodeFunctionCall (get_value_setter_function (property_type));
  68                 cvalueset.add_argument (gvaluearg);
  69                 cvalueset.add_argument (value);
  70                 ccomma.append_expression (cvalueset);
  71
  72                 // move pointer to next parameter in array
  73                 ccomma.append_expression (new CCodeUnaryExpression (CCodeUnaryOperator.POSTFIX_INCREMENT, cpointer));
  74
  75                 return ccomma;
  76         }
  77
  78         public CCodeBinding? code_binding (CodeNode node) {
  79                 return (CCodeBinding) node.get_code_binding (codegen);
  80         }
  81
  82         public CCodeMethodBinding method_binding (Method node) {
  83                 return (CCodeMethodBinding) node.get_code_binding (codegen);
  84         }
  85
  86         public CCodeArrayCreationExpressionBinding array_creation_expression_binding (ArrayCreationExpression node) {
  87                 return (CCodeArrayCreationExpressionBinding) node.get_code_binding (codegen);
  88         }
  89
  90         public CCodeElementAccessBinding element_access_binding (ElementAccess node) {
  91                 return (CCodeElementAccessBinding) node.get_code_binding (codegen);
  92         }
  93
  94         public CCodeAssignmentBinding assignment_binding (Assignment node) {
  95                 return (CCodeAssignmentBinding) node.get_code_binding (codegen);
  96         }
  97 }