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/* valaccodegeneratormemberaccess.vala
*
* Copyright (C) 2006-2008 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 2.1 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 <raffaele@sandrini.ch>
*/
using GLib;
public class Vala.CCodeGenerator {
private void process_cmember (MemberAccess! expr, CCodeExpression pub_inst, DataType base_type) {
if (expr.symbol_reference is Method) {
var m = (Method) expr.symbol_reference;
if (expr.inner is BaseAccess) {
if (m.base_interface_method != null) {
var base_iface = (Interface) m.base_interface_method.parent_symbol;
string parent_iface_var = "%s_%s_parent_iface".printf (current_class.get_lower_case_cname (null), base_iface.get_lower_case_cname (null));
expr.ccodenode = new CCodeMemberAccess.pointer (new CCodeIdentifier (parent_iface_var), m.name);
return;
} else if (m.base_method != null) {
var base_class = (Class) m.base_method.parent_symbol;
var vcast = new CCodeFunctionCall (new CCodeIdentifier ("%s_CLASS".printf (base_class.get_upper_case_cname (null))));
vcast.add_argument (new CCodeIdentifier ("%s_parent_class".printf (current_class.get_lower_case_cname (null))));
expr.ccodenode = new CCodeMemberAccess.pointer (vcast, m.name);
return;
}
}
if (m.base_interface_method != null) {
expr.ccodenode = new CCodeIdentifier (m.base_interface_method.get_cname ());
} else if (m.base_method != null) {
var binding = CCodeMethodBinding.get (m.base_method);
if (!binding.has_wrapper) {
var inst = pub_inst;
if (expr.inner != null && !expr.inner.is_pure ()) {
// instance expression has side-effects
// store in temp. variable
var temp_decl = get_temp_variable_declarator (expr.inner.static_type);
temp_vars.insert (0, temp_decl);
var ctemp = new CCodeIdentifier (temp_decl.name);
inst = new CCodeAssignment (ctemp, pub_inst);
expr.inner.ccodenode = ctemp;
}
var base_class = (Class) m.base_method.parent_symbol;
var vclass = new CCodeFunctionCall (new CCodeIdentifier ("%s_GET_CLASS".printf (base_class.get_upper_case_cname (null))));
vclass.add_argument (inst);
expr.ccodenode = new CCodeMemberAccess.pointer (vclass, m.name);
} else {
expr.ccodenode = new CCodeIdentifier (m.base_method.get_cname ());
}
} else {
expr.ccodenode = new CCodeIdentifier (m.get_cname ());
}
} else if (expr.symbol_reference is ArrayLengthField) {
expr.ccodenode = get_array_length_cexpression (expr.inner, 1);
} else if (expr.symbol_reference is Field) {
var f = (Field) expr.symbol_reference;
if (f.instance) {
var instance_expression_type = base_type;
var instance_target_type = get_data_type_for_symbol ((Typesymbol) f.parent_symbol);
CCodeExpression typed_inst = get_implicit_cast_expression (pub_inst, instance_expression_type, instance_target_type);
bool is_gtypeinstance = (instance_target_type.data_type.is_subtype_of (gtypeinstance_type));
CCodeExpression inst;
if (is_gtypeinstance && f.access == SymbolAccessibility.PRIVATE) {
inst = new CCodeMemberAccess.pointer (typed_inst, "priv");
} else {
inst = typed_inst;
}
if (instance_target_type.data_type.is_reference_type () || (expr.inner != null && expr.inner.static_type is PointerType)) {
expr.ccodenode = new CCodeMemberAccess.pointer (inst, f.get_cname ());
} else {
expr.ccodenode = new CCodeMemberAccess (inst, f.get_cname ());
}
} else {
expr.ccodenode = new CCodeIdentifier (f.get_cname ());
}
if (f.type_reference.type_parameter != null && expr.static_type.type_parameter == null) {
expr.ccodenode = convert_from_generic_pointer ((CCodeExpression) expr.ccodenode, expr.static_type);
}
} else if (expr.symbol_reference is Constant) {
var c = (Constant) expr.symbol_reference;
expr.ccodenode = new CCodeIdentifier (c.get_cname ());
} else if (expr.symbol_reference is Property) {
var prop = (Property) expr.symbol_reference;
if (prop.get_accessor != null &&
prop.get_accessor.automatic_body &&
current_type_symbol == prop.parent_symbol) {
CCodeExpression inst;
inst = new CCodeMemberAccess.pointer (pub_inst, "priv");
expr.ccodenode = new CCodeMemberAccess.pointer (inst, prop.field.get_cname());
} else if (!prop.no_accessor_method) {
var base_property = prop;
if (prop.base_property != null) {
base_property = prop.base_property;
} else if (prop.base_interface_property != null) {
base_property = prop.base_interface_property;
}
var base_property_type = (Typesymbol) base_property.parent_symbol;
var ccall = new CCodeFunctionCall (new CCodeIdentifier ("%s_get_%s".printf (base_property_type.get_lower_case_cname (null), base_property.name)));
var instance_expression_type = base_type;
var instance_target_type = get_data_type_for_symbol (base_property_type);
CCodeExpression typed_pub_inst = get_implicit_cast_expression (pub_inst, instance_expression_type, instance_target_type);
ccall.add_argument (typed_pub_inst);
// Property acesses to real struct types are handeled different to other properties.
// They are returned as out parameter.
if (base_property.type_reference.is_real_struct_type ()) {
var ccomma = new CCodeCommaExpression ();
var temp_decl = get_temp_variable_declarator (base_property.type_reference);
var ctemp = new CCodeIdentifier (temp_decl.name);
temp_vars.add (temp_decl);
ccall.add_argument (new CCodeUnaryExpression(CCodeUnaryOperator.ADDRESS_OF, ctemp));
ccomma.append_expression (ccall);
ccomma.append_expression (ctemp);
expr.ccodenode = ccomma;
} else {
expr.ccodenode = ccall;
}
} else {
var ccall = new CCodeFunctionCall (new CCodeIdentifier ("g_object_get"));
var ccast = new CCodeFunctionCall (new CCodeIdentifier ("G_OBJECT"));
ccast.add_argument (pub_inst);
ccall.add_argument (ccast);
// property name is second argument of g_object_get
ccall.add_argument (prop.get_canonical_cconstant ());
// we need a temporary variable to save the property value
var temp_decl = get_temp_variable_declarator (expr.static_type);
temp_vars.insert (0, temp_decl);
var ctemp = new CCodeIdentifier (temp_decl.name);
ccall.add_argument (new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, ctemp));
ccall.add_argument (new CCodeConstant ("NULL"));
var ccomma = new CCodeCommaExpression ();
ccomma.append_expression (ccall);
ccomma.append_expression (ctemp);
expr.ccodenode = ccomma;
}
} else if (expr.symbol_reference is EnumValue) {
var ev = (EnumValue) expr.symbol_reference;
expr.ccodenode = new CCodeConstant (ev.get_cname ());
} else if (expr.symbol_reference is VariableDeclarator) {
var decl = (VariableDeclarator) expr.symbol_reference;
expr.ccodenode = new CCodeIdentifier (get_variable_cname (decl.name));
} else if (expr.symbol_reference is FormalParameter) {
var p = (FormalParameter) expr.symbol_reference;
if (p.name == "this") {
expr.ccodenode = pub_inst;
} else {
var type_as_struct = p.type_reference.data_type as Struct;
if (p.type_reference.is_out
|| p.type_reference.is_ref
|| (type_as_struct != null && !type_as_struct.is_simple_type ())) {
expr.ccodenode = new CCodeIdentifier ("(*%s)".printf (p.name));
} else {
// Property setters of non simple structs shall replace all occurences
// of the "value" formal parameter with a dereferencing version of that
// parameter.
if (current_property_accessor != null &&
current_property_accessor.writable &&
current_property_accessor.value_parameter == p &&
current_property_accessor.prop.type_reference.is_real_struct_type ()) {
expr.ccodenode = new CCodeIdentifier ("(*value)");
} else {
expr.ccodenode = new CCodeIdentifier (p.name);
}
}
}
} else if (expr.symbol_reference is Signal) {
var sig = (Signal) expr.symbol_reference;
var cl = (Typesymbol) sig.parent_symbol;
if (sig.has_emitter) {
var ccall = new CCodeFunctionCall (new CCodeIdentifier ("%s_%s".printf (cl.get_lower_case_cname (null), sig.name)));
var instance_expression_type = base_type;
var instance_target_type = get_data_type_for_symbol (cl);
CCodeExpression typed_pub_inst = get_implicit_cast_expression (pub_inst, instance_expression_type, instance_target_type);
ccall.add_argument (typed_pub_inst);
expr.ccodenode = ccall;
} else {
var ccall = new CCodeFunctionCall (new CCodeIdentifier ("g_signal_emit_by_name"));
// FIXME: use C cast if debugging disabled
var ccast = new CCodeFunctionCall (new CCodeIdentifier ("G_OBJECT"));
ccast.add_argument (pub_inst);
ccall.add_argument (ccast);
ccall.add_argument (sig.get_canonical_cconstant ());
expr.ccodenode = ccall;
}
}
}
public override void visit_member_access (MemberAccess! expr) {
CCodeExpression pub_inst = null;
DataType base_type = null;
if (expr.inner == null) {
pub_inst = new CCodeIdentifier ("self");
if (current_type_symbol != null) {
/* base type is available if this is a type method */
if (current_type_symbol is Class) {
base_type = new ClassType ((Class) current_type_symbol);
} else if (current_type_symbol is Interface) {
base_type = new InterfaceType ((Interface) current_type_symbol);
} else {
base_type = new ValueType (current_type_symbol);
pub_inst = new CCodeIdentifier ("(*self)");
}
}
} else {
pub_inst = (CCodeExpression) expr.inner.ccodenode;
if (expr.inner.static_type != null) {
base_type = expr.inner.static_type;
}
}
process_cmember (expr, pub_inst, base_type);
visit_expression (expr);
}
}
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