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/* valacodegeneratorsignal.vala
*
* Copyright (C) 2006-2007 Jürg Billeter, Raffaele Sandrini
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2 of the License, or (at your option) any later version.
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA
*
* Author:
* Jürg Billeter <j@bitron.ch>
* Raffaele Sandrini <rasa@gmx.ch>
*/
using GLib;
public class Vala.CodeGenerator {
private string get_marshaller_type_name (TypeReference t) {
if (t.type_parameter != null) {
return ("POINTER");
} else if (t.data_type == null) {
return ("VOID");
} else {
return t.data_type.get_marshaller_type_name ();
}
}
private string get_signal_marshaller_function (Signal! sig, string prefix = null) {
var signature = get_signal_signature (sig);
string ret;
var params = sig.get_parameters ();
if (prefix == null) {
if (predefined_marshal_set.contains (signature)) {
prefix = "g_cclosure_marshal";
} else {
prefix = "g_cclosure_user_marshal";
}
}
ret = "%s_%s_".printf (prefix, get_marshaller_type_name (sig.return_type));
if (params == null) {
ret = ret + "_VOID";
} else {
foreach (FormalParameter p in params) {
ret = "%s_%s".printf (ret, get_marshaller_type_name (p.type_reference));
}
}
return ret;
}
private string get_value_type_name_from_type_reference (TypeReference! t) {
if (t.type_parameter != null) {
return "gpointer";
} else if (t.data_type == null) {
return "void";
} else if (t.data_type is Class || t.data_type is Interface) {
return "GObject *";
} else if (t.data_type is Struct) {
if (((Struct) t.data_type).is_reference_type ()) {
return "gpointer";
} else {
return t.data_type.get_cname ();
}
} else if (t.data_type is Enum) {
return "gint";
} else if (t.data_type is Array) {
return "gpointer";
}
return null;
}
private string get_signal_signature (Signal! sig) {
string signature;
var params = sig.get_parameters ();
signature = "%s:".printf (get_marshaller_type_name (sig.return_type));
if (params == null) {
signature = signature + "VOID";
} else {
bool first = true;
foreach (FormalParameter p in params) {
if (first) {
signature = signature + get_marshaller_type_name (p.type_reference);
first = false;
} else {
signature = "%s,%s".printf (signature, get_marshaller_type_name (p.type_reference));
}
}
}
return signature;
}
public override void visit_signal (Signal! sig) {
sig.accept_children (this);
string signature;
var params = sig.get_parameters ();
int n_params, i;
/* check whether a signal with the same signature already exists for this source file (or predefined) */
signature = get_signal_signature (sig);
if (predefined_marshal_set.contains (signature) || user_marshal_set.contains (signature)) {
return;
}
var signal_marshaller = new CCodeFunction (get_signal_marshaller_function (sig), "void");
signal_marshaller.modifiers = CCodeModifiers.STATIC;
signal_marshaller.add_parameter (new CCodeFormalParameter ("closure", "GClosure *"));
signal_marshaller.add_parameter (new CCodeFormalParameter ("return_value", "GValue *"));
signal_marshaller.add_parameter (new CCodeFormalParameter ("n_param_values", "guint"));
signal_marshaller.add_parameter (new CCodeFormalParameter ("param_values", "const GValue *"));
signal_marshaller.add_parameter (new CCodeFormalParameter ("invocation_hint", "gpointer"));
signal_marshaller.add_parameter (new CCodeFormalParameter ("marshal_data", "gpointer"));
source_signal_marshaller_declaration.append (signal_marshaller.copy ());
var marshaller_body = new CCodeBlock ();
var callback_decl = new CCodeFunctionDeclarator (get_signal_marshaller_function (sig, "GMarshalFunc"));
callback_decl.add_parameter (new CCodeFormalParameter ("data1", "gpointer"));
n_params = 1;
foreach (FormalParameter p in params) {
callback_decl.add_parameter (new CCodeFormalParameter ("arg_%d".printf (n_params), get_value_type_name_from_type_reference (p.type_reference)));
n_params++;
}
callback_decl.add_parameter (new CCodeFormalParameter ("data2", "gpointer"));
marshaller_body.add_statement (new CCodeTypeDefinition (get_value_type_name_from_type_reference (sig.return_type), callback_decl));
var var_decl = new CCodeDeclaration (get_signal_marshaller_function (sig, "GMarshalFunc"));
var_decl.modifiers = CCodeModifiers.REGISTER;
var_decl.add_declarator (new CCodeVariableDeclarator ("callback"));
marshaller_body.add_statement (var_decl);
var_decl = new CCodeDeclaration ("GCClosure *");
var_decl.modifiers = CCodeModifiers.REGISTER;
var_decl.add_declarator (new CCodeVariableDeclarator.with_initializer ("cc", new CCodeCastExpression (new CCodeIdentifier ("closure"), "GCClosure *")));
marshaller_body.add_statement (var_decl);
var_decl = new CCodeDeclaration ("gpointer");
var_decl.modifiers = CCodeModifiers.REGISTER;
var_decl.add_declarator (new CCodeVariableDeclarator ("data1"));
var_decl.add_declarator (new CCodeVariableDeclarator ("data2"));
marshaller_body.add_statement (var_decl);
CCodeFunctionCall fc;
if (sig.return_type.data_type != null) {
var_decl = new CCodeDeclaration (get_value_type_name_from_type_reference (sig.return_type));
var_decl.add_declarator (new CCodeVariableDeclarator ("v_return"));
marshaller_body.add_statement (var_decl);
fc = new CCodeFunctionCall (new CCodeIdentifier ("g_return_if_fail"));
fc.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.INEQUALITY, new CCodeIdentifier ("return_value"), new CCodeConstant ("NULL")));
marshaller_body.add_statement (new CCodeExpressionStatement (fc));
}
fc = new CCodeFunctionCall (new CCodeIdentifier ("g_return_if_fail"));
fc.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, new CCodeIdentifier ("n_param_values"), new CCodeConstant (n_params.to_string())));
marshaller_body.add_statement (new CCodeExpressionStatement (fc));
var data = new CCodeMemberAccess (new CCodeIdentifier ("closure"), "data", true);
var param = new CCodeMemberAccess (new CCodeMemberAccess (new CCodeIdentifier ("param_values"), "data[0]", true), "v_pointer");
var cond = new CCodeFunctionCall (new CCodeConstant ("G_CCLOSURE_SWAP_DATA"));
cond.add_argument (new CCodeIdentifier ("closure"));
var true_block = new CCodeBlock ();
true_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("data1"), data)));
true_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("data2"), param)));
var false_block = new CCodeBlock ();
false_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("data1"), param)));
false_block.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("data2"), data)));
marshaller_body.add_statement (new CCodeIfStatement (cond, true_block, false_block));
var c_assign = new CCodeAssignment (new CCodeIdentifier ("callback"), new CCodeCastExpression (new CCodeConditionalExpression (new CCodeIdentifier ("marshal_data"), new CCodeIdentifier ("marshal_data"), new CCodeMemberAccess (new CCodeIdentifier ("cc"), "callback", true)), get_signal_marshaller_function (sig, "GMarshalFunc")));
marshaller_body.add_statement (new CCodeExpressionStatement (c_assign));
fc = new CCodeFunctionCall (new CCodeIdentifier ("callback"));
fc.add_argument (new CCodeIdentifier ("data1"));
i = 1;
foreach (FormalParameter p in params) {
string get_value_function;
if (p.type_reference.type_parameter != null) {
get_value_function = "g_value_get_pointer";
} else {
get_value_function = p.type_reference.data_type.get_get_value_function ();
}
var inner_fc = new CCodeFunctionCall (new CCodeIdentifier (get_value_function));
inner_fc.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.PLUS, new CCodeIdentifier ("param_values"), new CCodeIdentifier (i.to_string ())));
fc.add_argument (inner_fc);
i++;
}
fc.add_argument (new CCodeIdentifier ("data2"));
if (sig.return_type.data_type != null) {
marshaller_body.add_statement (new CCodeExpressionStatement (new CCodeAssignment (new CCodeIdentifier ("v_return"), fc)));
CCodeFunctionCall set_fc;
if (sig.return_type.type_parameter != null) {
set_fc = new CCodeFunctionCall (new CCodeIdentifier ("g_value_set_pointer"));
} else if (sig.return_type.data_type is Class || sig.return_type.data_type is Interface) {
set_fc = new CCodeFunctionCall (new CCodeIdentifier ("g_value_take_object"));
} else if (sig.return_type.data_type == string_type.data_type) {
set_fc = new CCodeFunctionCall (new CCodeIdentifier ("g_value_take_string"));
} else {
set_fc = new CCodeFunctionCall (new CCodeIdentifier (sig.return_type.data_type.get_set_value_function ()));
}
set_fc.add_argument (new CCodeIdentifier ("return_value"));
set_fc.add_argument (new CCodeIdentifier ("v_return"));
marshaller_body.add_statement (new CCodeExpressionStatement (set_fc));
} else {
marshaller_body.add_statement (new CCodeExpressionStatement (fc));
}
signal_marshaller.block = marshaller_body;
source_signal_marshaller_definition.append (signal_marshaller);
user_marshal_set.add (signature);
}
}
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