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/* valaccodemethodcallmodule.vala
*
* Copyright (C) 2006-2010 Jürg Billeter
* Copyright (C) 2006-2008 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.CCodeMethodCallModule : CCodeAssignmentModule {
public override void visit_method_call (MethodCall expr) {
// the bare function call
var ccall = new CCodeFunctionCall (get_cvalue (expr.call));
CCodeFunctionCall async_call = null;
CCodeFunctionCall finish_call = null;
Method m = null;
Delegate deleg = null;
List<Parameter> params;
var ma = expr.call as MemberAccess;
var itype = expr.call.value_type;
params = itype.get_parameters ();
if (itype is MethodType) {
assert (ma != null);
m = ((MethodType) itype).method_symbol;
if (ma.inner != null && ma.inner.value_type is EnumValueType && ((EnumValueType) ma.inner.value_type).get_to_string_method() == m) {
// Enum.VALUE.to_string()
var en = (Enum) ma.inner.value_type.data_type;
ccall.call = new CCodeIdentifier (generate_enum_tostring_function (en));
}
} else if (itype is SignalType) {
var sig_type = (SignalType) itype;
if (ma != null && ma.inner is BaseAccess && sig_type.signal_symbol.is_virtual) {
m = sig_type.signal_symbol.default_handler;
} else {
ccall = (CCodeFunctionCall) get_cvalue (expr.call);
}
} else if (itype is ObjectType) {
// constructor
var cl = (Class) ((ObjectType) itype).type_symbol;
m = cl.default_construction_method;
generate_method_declaration (m, cfile);
ccall = new CCodeFunctionCall (new CCodeIdentifier (get_ccode_real_name (m)));
} else if (itype is StructValueType) {
// constructor
var st = (Struct) ((StructValueType) itype).type_symbol;
m = st.default_construction_method;
generate_method_declaration (m, cfile);
ccall = new CCodeFunctionCall (new CCodeIdentifier (get_ccode_real_name (m)));
} else if (itype is DelegateType) {
deleg = ((DelegateType) itype).delegate_symbol;
}
var in_arg_map = new HashMap<int,CCodeExpression> (direct_hash, direct_equal);
var out_arg_map = in_arg_map;
if (m != null && m.coroutine) {
// async call
async_call = new CCodeFunctionCall (new CCodeIdentifier (get_ccode_name (m)));
finish_call = new CCodeFunctionCall (new CCodeIdentifier (get_ccode_finish_name (m)));
if (ma.inner is BaseAccess) {
if (m.base_method != null) {
var base_class = (Class) m.base_method.parent_symbol;
var vcast = new CCodeFunctionCall (new CCodeIdentifier ("%s_CLASS".printf (get_ccode_upper_case_name (base_class, null))));
vcast.add_argument (new CCodeIdentifier ("%s_parent_class".printf (get_ccode_lower_case_name (current_class, null))));
async_call.call = new CCodeMemberAccess.pointer (vcast, get_ccode_vfunc_name (m));
finish_call.call = new CCodeMemberAccess.pointer (vcast, get_ccode_finish_vfunc_name (m));
} else 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 (get_ccode_lower_case_name (current_class), get_ccode_lower_case_name (base_iface));
async_call.call = new CCodeMemberAccess.pointer (new CCodeIdentifier (parent_iface_var), get_ccode_vfunc_name (m));
finish_call.call = new CCodeMemberAccess.pointer (new CCodeIdentifier (parent_iface_var), get_ccode_finish_vfunc_name (m));
}
}
if (ma.member_name == "begin" && ma.inner.symbol_reference == ma.symbol_reference) {
// no finish call
ccall = async_call;
params = m.get_async_begin_parameters ();
} else if (ma.member_name == "end" && ma.inner.symbol_reference == ma.symbol_reference) {
// no async call
ccall = finish_call;
params = m.get_async_end_parameters ();
} else if (!expr.is_yield_expression) {
// same as .begin, backwards compatible to bindings without async methods
ccall = async_call;
params = m.get_async_begin_parameters ();
} else {
ccall = finish_call;
// output arguments used separately
out_arg_map = new HashMap<int,CCodeExpression> (direct_hash, direct_equal);
// pass GAsyncResult stored in closure to finish function
out_arg_map.set (get_param_pos (0.1), new CCodeMemberAccess.pointer (new CCodeIdentifier ("_data_"), "_res_"));
}
}
if (m is CreationMethod && m.parent_symbol is Class) {
if (context.profile == Profile.GOBJECT) {
if (!((Class) m.parent_symbol).is_compact) {
ccall.add_argument (new CCodeIdentifier ("object_type"));
}
} else {
ccall.add_argument (new CCodeIdentifier ("self"));
}
if (!current_class.is_compact) {
if (current_class != m.parent_symbol) {
// chain up to base class
foreach (DataType base_type in current_class.get_base_types ()) {
if (base_type.data_type is Class) {
List<TypeParameter> type_parameters = null;
if (get_ccode_real_name (m) == "g_object_new") {
// gobject-style chainup
type_parameters = ((Class) base_type.data_type).get_type_parameters ();
}
add_generic_type_arguments (in_arg_map, base_type.get_type_arguments (), expr, true, type_parameters);
break;
}
}
} else {
// chain up to other constructor in same class
int type_param_index = 0;
var cl = (Class) m.parent_symbol;
foreach (TypeParameter type_param in cl.get_type_parameters ()) {
in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.01), new CCodeIdentifier ("%s_type".printf (type_param.name.down ())));
in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.02), new CCodeIdentifier ("%s_dup_func".printf (type_param.name.down ())));
in_arg_map.set (get_param_pos (0.1 * type_param_index + 0.03), new CCodeIdentifier ("%s_destroy_func".printf (type_param.name.down ())));
type_param_index++;
}
}
}
} else if (m is CreationMethod && m.parent_symbol is Struct) {
ccall.add_argument (new CCodeIdentifier ("self"));
} else if (m != null && m.get_type_parameters ().size > 0 && !get_ccode_has_generic_type_parameter (m) && !get_ccode_simple_generics (m) && (ccall != finish_call || expr.is_yield_expression)) {
// generic method
// don't add generic arguments for .end() calls
add_generic_type_arguments (in_arg_map, ma.get_type_arguments (), expr);
}
// the complete call expression, might include casts, comma expressions, and/or assignments
CCodeExpression ccall_expr = ccall;
if (m is ArrayResizeMethod) {
var array_type = (ArrayType) ma.inner.value_type;
in_arg_map.set (get_param_pos (0), new CCodeIdentifier (get_ccode_name (array_type.element_type)));
} else if (m is ArrayMoveMethod) {
requires_array_move = true;
}
CCodeExpression instance = null;
if (m != null && m.is_async_callback) {
if (current_method.closure) {
var block = ((Method) m.parent_symbol).body;
instance = new CCodeMemberAccess.pointer (get_variable_cexpression ("_data%d_".printf (get_block_id (block))), "_async_data_");
} else {
instance = new CCodeIdentifier ("_data_");
}
in_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), instance);
out_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), instance);
} else if (m != null && m.binding == MemberBinding.INSTANCE && !(m is CreationMethod)) {
var instance_value = ma.inner.target_value;
if ((ma.member_name == "begin" || ma.member_name == "end") && ma.inner.symbol_reference == ma.symbol_reference) {
var inner_ma = (MemberAccess) ma.inner;
instance_value = inner_ma.inner.target_value;
}
instance = get_cvalue_ (instance_value);
var st = m.parent_symbol as Struct;
if (st != null && !st.is_simple_type ()) {
// we need to pass struct instance by reference
if (!get_lvalue (instance_value)) {
instance_value = store_temp_value (instance_value, expr);
}
instance = new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_cvalue_ (instance_value));
}
in_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), instance);
out_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), instance);
} else if (m != null && m.binding == MemberBinding.CLASS) {
var cl = (Class) m.parent_symbol;
var cast = new CCodeFunctionCall (new CCodeIdentifier (get_ccode_upper_case_name (cl, null) + "_CLASS"));
CCodeExpression klass;
if (ma.inner == null) {
if (get_this_type () == null) {
// Accessing the method from a static or class constructor
klass = new CCodeIdentifier ("klass");
} else {
// Accessing the method from within an instance method
var k = new CCodeFunctionCall (new CCodeIdentifier ("G_OBJECT_GET_CLASS"));
k.add_argument (new CCodeIdentifier ("self"));
klass = k;
}
} else {
// Accessing the method of an instance
var k = new CCodeFunctionCall (new CCodeIdentifier ("G_OBJECT_GET_CLASS"));
k.add_argument (get_cvalue (ma.inner));
klass = k;
}
cast.add_argument (klass);
in_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), cast);
out_arg_map.set (get_param_pos (get_ccode_instance_pos (m)), cast);
}
if (m != null && get_ccode_has_generic_type_parameter (m)) {
// insert type argument for macros
if (m.get_type_parameters ().size > 0) {
// generic method
int type_param_index = 0;
foreach (var type_arg in ma.get_type_arguments ()) {
in_arg_map.set (get_param_pos (get_ccode_generic_type_pos (m) + 0.01 * type_param_index), new CCodeIdentifier (get_ccode_name (type_arg)));
type_param_index++;
}
} else {
// method in generic type
int type_param_index = 0;
foreach (var type_arg in ma.inner.value_type.get_type_arguments ()) {
in_arg_map.set (get_param_pos (get_ccode_generic_type_pos (m) + 0.01 * type_param_index), new CCodeIdentifier (get_ccode_name (type_arg)));
type_param_index++;
}
}
}
if (m is ArrayMoveMethod) {
var array_type = (ArrayType) ma.inner.value_type;
var csizeof = new CCodeFunctionCall (new CCodeIdentifier ("sizeof"));
csizeof.add_argument (new CCodeIdentifier (get_ccode_name (array_type.element_type)));
in_arg_map.set (get_param_pos (0.1), csizeof);
} else if (m is DynamicMethod) {
m.clear_parameters ();
int param_nr = 1;
foreach (Expression arg in expr.get_argument_list ()) {
var unary = arg as UnaryExpression;
if (unary != null && unary.operator == UnaryOperator.OUT) {
// out argument
var param = new Parameter ("param%d".printf (param_nr), unary.inner.value_type);
param.direction = ParameterDirection.OUT;
m.add_parameter (param);
} else if (unary != null && unary.operator == UnaryOperator.REF) {
// ref argument
var param = new Parameter ("param%d".printf (param_nr), unary.inner.value_type);
param.direction = ParameterDirection.REF;
m.add_parameter (param);
} else {
// in argument
m.add_parameter (new Parameter ("param%d".printf (param_nr), arg.value_type));
}
param_nr++;
}
foreach (Parameter param in m.get_parameters ()) {
param.accept (this);
}
generate_dynamic_method_wrapper ((DynamicMethod) m);
} else if (m is CreationMethod && context.profile == Profile.GOBJECT && m.parent_symbol is Class) {
ccode.add_assignment (new CCodeIdentifier ("self"), new CCodeCastExpression (ccall, CCodeBaseModule.get_ccode_name (current_class) + "*"));
if (current_method.body.captured) {
// capture self after setting it
var ref_call = new CCodeFunctionCall (get_dup_func_expression (new ObjectType (current_class), expr.source_reference));
ref_call.add_argument (new CCodeIdentifier ("self"));
ccode.add_assignment (new CCodeMemberAccess.pointer (get_variable_cexpression ("_data%d_".printf (get_block_id (current_method.body))), "self"), ref_call);
}
if (!current_class.is_compact && current_class.get_type_parameters ().size > 0) {
/* type, dup func, and destroy func fields for generic types */
var suffices = new string[] {"type", "dup_func", "destroy_func"};
foreach (TypeParameter type_param in current_class.get_type_parameters ()) {
var priv_access = new CCodeMemberAccess.pointer (new CCodeIdentifier ("self"), "priv");
foreach (string suffix in suffices) {
var param_name = new CCodeIdentifier ("%s_%s".printf (type_param.name.down (), suffix));
ccode.add_assignment (new CCodeMemberAccess.pointer (priv_access, param_name.name), param_name);
}
}
}
// object chainup can't be used as expression
ccall_expr = null;
}
bool ellipsis = false;
int i = 1;
int arg_pos;
Iterator<Parameter> params_it = params.iterator ();
foreach (Expression arg in expr.get_argument_list ()) {
CCodeExpression cexpr = get_cvalue (arg);
var carg_map = in_arg_map;
if (params_it.next ()) {
var param = params_it.get ();
ellipsis = param.params_array || param.ellipsis;
if (!ellipsis) {
if (param.direction == ParameterDirection.OUT) {
carg_map = out_arg_map;
}
var unary = arg as UnaryExpression;
if (unary == null || unary.operator != UnaryOperator.OUT) {
if (get_ccode_array_length (param) && param.variable_type is ArrayType) {
var array_type = (ArrayType) param.variable_type;
for (int dim = 1; dim <= array_type.rank; dim++) {
CCodeExpression? array_length_expr = null;
if (get_ccode_array_length_type (param) != null) {
array_length_expr = new CCodeCastExpression (get_array_length_cexpression (arg, dim), get_ccode_array_length_type (param));
} else {
array_length_expr = get_array_length_cexpression (arg, dim);
}
carg_map.set (get_param_pos (get_ccode_array_length_pos (param) + 0.01 * dim), array_length_expr);
}
} else if (param.variable_type is DelegateType) {
var deleg_type = (DelegateType) param.variable_type;
var d = deleg_type.delegate_symbol;
if (d.has_target) {
CCodeExpression delegate_target_destroy_notify;
var delegate_target = get_delegate_target_cexpression (arg, out delegate_target_destroy_notify);
assert (delegate_target != null);
if (get_ccode_type (param) == "GClosure*") {
// one single GClosure parameter
var closure_new = new CCodeFunctionCall (new CCodeIdentifier ("g_cclosure_new"));
closure_new.add_argument (new CCodeCastExpression (cexpr, "GCallback"));
closure_new.add_argument (delegate_target);
closure_new.add_argument (delegate_target_destroy_notify);
cexpr = new CCodeConditionalExpression (new CCodeBinaryExpression (CCodeBinaryOperator.EQUALITY, cexpr, new CCodeIdentifier ("NULL")), new CCodeIdentifier ("NULL"), closure_new);
} else {
carg_map.set (get_param_pos (get_ccode_delegate_target_pos (param)), delegate_target);
if (deleg_type.value_owned) {
assert (delegate_target_destroy_notify != null);
carg_map.set (get_param_pos (get_ccode_delegate_target_pos (param) + 0.01), delegate_target_destroy_notify);
}
}
}
} else if (param.variable_type is MethodType) {
// callbacks in dynamic method calls
CCodeExpression delegate_target_destroy_notify;
carg_map.set (get_param_pos (get_ccode_delegate_target_pos (param)), get_delegate_target_cexpression (arg, out delegate_target_destroy_notify));
} else if (param.variable_type is GenericType) {
if (m != null && get_ccode_simple_generics (m)) {
var generic_type = (GenericType) param.variable_type;
int type_param_index = m.get_type_parameter_index (generic_type.type_parameter.name);
var type_arg = ma.get_type_arguments ().get (type_param_index);
if (param.variable_type.value_owned) {
if (requires_copy (type_arg)) {
carg_map.set (get_param_pos (get_ccode_destroy_notify_pos (param)), get_destroy_func_expression (type_arg));
} else {
carg_map.set (get_param_pos (get_ccode_destroy_notify_pos (param)), new CCodeConstant ("NULL"));
}
}
}
}
cexpr = handle_struct_argument (param, arg, cexpr);
} else {
arg.target_value = null;
var temp_var = get_temp_variable (param.variable_type, param.variable_type.value_owned);
emit_temp_var (temp_var);
set_cvalue (arg, get_variable_cexpression (temp_var.name));
arg.target_value.value_type = arg.target_type;
cexpr = new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_cvalue (arg));
if (get_ccode_array_length (param) && param.variable_type is ArrayType) {
var array_type = (ArrayType) param.variable_type;
var array_length_type = int_type;
if (get_ccode_array_length_type (param) != null) {
array_length_type = new CType (get_ccode_array_length_type (param));
}
for (int dim = 1; dim <= array_type.rank; dim++) {
var temp_array_length = get_temp_variable (array_length_type);
emit_temp_var (temp_array_length);
append_array_length (arg, get_variable_cexpression (temp_array_length.name));
carg_map.set (get_param_pos (get_ccode_array_length_pos (param) + 0.01 * dim), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_array_lengths (arg).get (dim - 1)));
}
} else if (param.variable_type is DelegateType) {
var deleg_type = (DelegateType) param.variable_type;
var d = deleg_type.delegate_symbol;
if (d.has_target) {
temp_var = get_temp_variable (new PointerType (new VoidType ()));
emit_temp_var (temp_var);
set_delegate_target (arg, get_variable_cexpression (temp_var.name));
carg_map.set (get_param_pos (get_ccode_delegate_target_pos (param)), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_delegate_target (arg)));
if (deleg_type.value_owned) {
temp_var = get_temp_variable (gdestroynotify_type);
emit_temp_var (temp_var);
set_delegate_target_destroy_notify (arg, get_variable_cexpression (temp_var.name));
carg_map.set (get_param_pos (get_ccode_delegate_target_pos (param) + 0.01), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_delegate_target_destroy_notify (arg)));
}
}
}
}
if (get_ccode_type (param) != null) {
cexpr = new CCodeCastExpression (cexpr, get_ccode_type (param));
}
} else {
cexpr = handle_struct_argument (null, arg, cexpr);
}
arg_pos = get_param_pos (get_ccode_pos (param), ellipsis);
} else {
// default argument position
cexpr = handle_struct_argument (null, arg, cexpr);
arg_pos = get_param_pos (i, ellipsis);
}
carg_map.set (arg_pos, cexpr);
if (arg is NamedArgument && ellipsis) {
var named_arg = (NamedArgument) arg;
string name = string.joinv ("-", named_arg.name.split ("_"));
carg_map.set (get_param_pos (i - 0.1, ellipsis), new CCodeConstant ("\"%s\"".printf (name)));
}
i++;
}
if (params_it.next ()) {
var param = params_it.get ();
/* if there are more parameters than arguments,
* the additional parameter is an ellipsis parameter
* otherwise there is a bug in the semantic analyzer
*/
assert (param.params_array || param.ellipsis);
ellipsis = true;
}
/* add length argument for methods returning arrays */
if (m != null && m.return_type is ArrayType && async_call != ccall) {
var array_type = (ArrayType) m.return_type;
for (int dim = 1; dim <= array_type.rank; dim++) {
if (get_ccode_array_null_terminated (m)) {
// handle calls to methods returning null-terminated arrays
var temp_var = get_temp_variable (itype.get_return_type (), true, null, false);
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
ccall_expr = new CCodeAssignment (temp_ref, ccall_expr);
requires_array_length = true;
var len_call = new CCodeFunctionCall (new CCodeIdentifier ("_vala_array_length"));
len_call.add_argument (temp_ref);
append_array_length (expr, len_call);
} else if (get_ccode_array_length (m)) {
LocalVariable temp_var;
if (get_ccode_array_length_type (m) == null) {
temp_var = get_temp_variable (int_type);
} else {
temp_var = get_temp_variable (new CType (get_ccode_array_length_type (m)));
}
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
out_arg_map.set (get_param_pos (get_ccode_array_length_pos (m) + 0.01 * dim), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, temp_ref));
append_array_length (expr, temp_ref);
} else {
append_array_length (expr, new CCodeConstant ("-1"));
}
}
} else if (m != null && m.return_type is DelegateType && async_call != ccall) {
var deleg_type = (DelegateType) m.return_type;
var d = deleg_type.delegate_symbol;
if (d.has_target) {
var temp_var = get_temp_variable (new PointerType (new VoidType ()));
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
out_arg_map.set (get_param_pos (get_ccode_delegate_target_pos (m)), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, temp_ref));
set_delegate_target (expr, temp_ref);
if (deleg_type.value_owned) {
temp_var = get_temp_variable (gdestroynotify_type);
temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
out_arg_map.set (get_param_pos (get_ccode_delegate_target_pos (m) + 0.01), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, temp_ref));
set_delegate_target_destroy_notify (expr, temp_ref);
} else {
set_delegate_target_destroy_notify (expr, new CCodeConstant ("NULL"));
}
} else {
set_delegate_target (expr, new CCodeConstant ("NULL"));
}
}
// add length argument for delegates returning arrays
// TODO: avoid code duplication with methods returning arrays, see above
if (deleg != null && deleg.return_type is ArrayType) {
var array_type = (ArrayType) deleg.return_type;
for (int dim = 1; dim <= array_type.rank; dim++) {
if (get_ccode_array_null_terminated (deleg)) {
// handle calls to methods returning null-terminated arrays
var temp_var = get_temp_variable (itype.get_return_type (), true, null, false);
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
ccall_expr = new CCodeAssignment (temp_ref, ccall_expr);
requires_array_length = true;
var len_call = new CCodeFunctionCall (new CCodeIdentifier ("_vala_array_length"));
len_call.add_argument (temp_ref);
append_array_length (expr, len_call);
} else if (get_ccode_array_length (deleg)) {
var temp_var = get_temp_variable (int_type);
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
out_arg_map.set (get_param_pos (get_ccode_array_length_pos (deleg) + 0.01 * dim), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, temp_ref));
append_array_length (expr, temp_ref);
} else {
append_array_length (expr, new CCodeConstant ("-1"));
}
}
} else if (deleg != null && deleg.return_type is DelegateType) {
var deleg_type = (DelegateType) deleg.return_type;
var d = deleg_type.delegate_symbol;
if (d.has_target) {
var temp_var = get_temp_variable (new PointerType (new VoidType ()));
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
out_arg_map.set (get_param_pos (get_ccode_delegate_target_pos (deleg)), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, temp_ref));
set_delegate_target (expr, temp_ref);
}
}
if (m != null && m.coroutine) {
if (expr.is_yield_expression) {
// asynchronous call
in_arg_map.set (get_param_pos (-1), new CCodeIdentifier (generate_ready_function (current_method)));
in_arg_map.set (get_param_pos (-0.9), new CCodeIdentifier ("_data_"));
}
}
if (expr.tree_can_fail) {
// method can fail
current_method_inner_error = true;
// add &inner_error before the ellipsis arguments
out_arg_map.set (get_param_pos (-1), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, get_variable_cexpression ("_inner_error_")));
}
if (ellipsis) {
/* ensure variable argument list ends with NULL
* except when using printf-style arguments */
if (m == null) {
in_arg_map.set (get_param_pos (-1, true), new CCodeConstant ("NULL"));
} else if (!m.printf_format && !m.scanf_format && get_ccode_sentinel (m) != "") {
in_arg_map.set (get_param_pos (-1, true), new CCodeConstant (get_ccode_sentinel (m)));
}
}
if (itype is DelegateType) {
var deleg_type = (DelegateType) itype;
var d = deleg_type.delegate_symbol;
if (d.has_target) {
CCodeExpression delegate_target_destroy_notify;
in_arg_map.set (get_param_pos (get_ccode_instance_pos (d)), get_delegate_target_cexpression (expr.call, out delegate_target_destroy_notify));
out_arg_map.set (get_param_pos (get_ccode_instance_pos (d)), get_delegate_target_cexpression (expr.call, out delegate_target_destroy_notify));
}
}
// structs are returned via out parameter
bool return_result_via_out_param = itype.get_return_type ().is_real_non_null_struct_type ();
// pass address for the return value of non-void signals without emitter functions
if (itype is SignalType && !(itype.get_return_type () is VoidType)) {
var sig = ((SignalType) itype).signal_symbol;
if (ma != null && ma.inner is BaseAccess && sig.is_virtual) {
// normal return value for base access
} else if (!get_signal_has_emitter (sig)) {
return_result_via_out_param = true;
}
}
CCodeExpression out_param_ref = null;
if (return_result_via_out_param) {
var out_param_var = get_temp_variable (itype.get_return_type ());
out_param_ref = get_variable_cexpression (out_param_var.name);
emit_temp_var (out_param_var);
out_arg_map.set (get_param_pos (-3), new CCodeUnaryExpression (CCodeUnaryOperator.ADDRESS_OF, out_param_ref));
}
// append C arguments in the right order
int last_pos;
int min_pos;
if (async_call != ccall) {
// don't append out arguments for .begin() calls
last_pos = -1;
while (true) {
min_pos = -1;
foreach (int pos in out_arg_map.get_keys ()) {
if (pos > last_pos && (min_pos == -1 || pos < min_pos)) {
min_pos = pos;
}
}
if (min_pos == -1) {
break;
}
ccall.add_argument (out_arg_map.get (min_pos));
last_pos = min_pos;
}
}
if (async_call != null) {
last_pos = -1;
while (true) {
min_pos = -1;
foreach (int pos in in_arg_map.get_keys ()) {
if (pos > last_pos && (min_pos == -1 || pos < min_pos)) {
min_pos = pos;
}
}
if (min_pos == -1) {
break;
}
async_call.add_argument (in_arg_map.get (min_pos));
last_pos = min_pos;
}
}
if (expr.is_yield_expression) {
// set state before calling async function to support immediate callbacks
int state = next_coroutine_state++;
ccode.add_assignment (new CCodeMemberAccess.pointer (new CCodeIdentifier ("_data_"), "_state_"), new CCodeConstant (state.to_string ()));
ccode.add_expression (async_call);
ccode.add_return (new CCodeConstant ("FALSE"));
ccode.add_label ("_state_%d".printf (state));
}
if (return_result_via_out_param) {
ccode.add_expression (ccall_expr);
ccall_expr = out_param_ref;
}
if (m != null && m.binding == MemberBinding.INSTANCE && m.returns_modified_pointer) {
if (ma != null && ma.inner.symbol_reference is Property && ma.inner is MemberAccess) {
var prop = (Property) ma.inner.symbol_reference;
store_property (prop, ((MemberAccess) ma.inner).inner, new GLibValue (expr.value_type, ccall_expr));
ccall_expr = null;
} else {
ccall_expr = new CCodeAssignment (instance, ccall_expr);
}
}
if (m is ArrayResizeMethod) {
// FIXME: size expression must not be evaluated twice at runtime (potential side effects)
Iterator<Expression> arg_it = expr.get_argument_list ().iterator ();
arg_it.next ();
var new_size = get_cvalue (arg_it.get ());
var temp_decl = get_temp_variable (int_type);
var temp_ref = get_variable_cexpression (temp_decl.name);
emit_temp_var (temp_decl);
/* memset needs string.h */
cfile.add_include ("string.h");
var clen = get_array_length_cexpression (ma.inner, 1);
var celems = get_cvalue (ma.inner);
var array_type = (ArrayType) ma.inner.value_type;
var csizeof = new CCodeIdentifier ("sizeof (%s)".printf (get_ccode_name (array_type.element_type)));
var cdelta = new CCodeBinaryExpression (CCodeBinaryOperator.MINUS, temp_ref, clen);
var ccheck = new CCodeBinaryExpression (CCodeBinaryOperator.GREATER_THAN, temp_ref, clen);
var czero = new CCodeFunctionCall (new CCodeIdentifier ("memset"));
czero.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.PLUS, celems, clen));
czero.add_argument (new CCodeConstant ("0"));
czero.add_argument (new CCodeBinaryExpression (CCodeBinaryOperator.MUL, csizeof, cdelta));
ccode.add_assignment (temp_ref, new_size);
ccode.add_expression (ccall_expr);
ccode.add_expression (new CCodeConditionalExpression (ccheck, czero, new CCodeConstant ("NULL")));
ccode.add_assignment (get_array_length_cexpression (ma.inner, 1), temp_ref);
var array_var = ma.inner.symbol_reference;
var array_local = array_var as LocalVariable;
if (array_var != null && array_var.is_internal_symbol ()
&& ((array_var is LocalVariable && !array_local.captured) || array_var is Field)) {
ccode.add_assignment (get_array_size_cvalue (ma.inner.target_value), temp_ref);
}
return;
}
if (expr.parent_node is ExpressionStatement && !expr.value_type.is_disposable ()) {
if (ccall_expr != null && !return_result_via_out_param) {
ccode.add_expression (ccall_expr);
}
} else {
var result_type = itype.get_return_type ();
if (expr.formal_value_type is GenericType && !(expr.value_type is GenericType)) {
var st = expr.formal_value_type.type_parameter.parent_symbol.parent_symbol as Struct;
if (expr.formal_value_type.type_parameter.parent_symbol == garray_type ||
(st != null && get_ccode_name (st) == "va_list")) {
// GArray and va_list don't use pointer-based generics
// above logic copied from visit_expression ()
// TODO avoid code duplication
result_type = expr.value_type;
}
}
if (!return_result_via_out_param) {
var temp_var = get_temp_variable (result_type, result_type.value_owned);
var temp_ref = get_variable_cexpression (temp_var.name);
emit_temp_var (temp_var);
ccode.add_assignment (temp_ref, ccall_expr);
set_cvalue (expr, temp_ref);
} else {
set_cvalue (expr, ccall_expr);
}
((GLibValue) expr.target_value).lvalue = true;
}
params_it = params.iterator ();
foreach (Expression arg in expr.get_argument_list ()) {
if (params_it.next ()) {
var param = params_it.get ();
if (param.params_array || param.ellipsis) {
// ignore ellipsis arguments as we currently don't use temporary variables for them
break;
}
}
var unary = arg as UnaryExpression;
if (unary == null || unary.operator != UnaryOperator.OUT) {
continue;
}
if (requires_destroy (unary.inner.value_type)) {
// unref old value
ccode.add_expression (destroy_value (unary.inner.target_value));
}
// assign new value
store_value (unary.inner.target_value, transform_value (unary.target_value, unary.inner.value_type, arg));
}
}
private string generate_enum_tostring_function (Enum en) {
var to_string_func = "_%s_to_string".printf (get_ccode_lower_case_name (en));
if (!add_wrapper (to_string_func)) {
// wrapper already defined
return to_string_func;
}
// declaration
var function = new CCodeFunction (to_string_func, "const char*");
function.modifiers = CCodeModifiers.STATIC;
function.add_parameter (new CCodeParameter ("value", get_ccode_name (en)));
// definition
push_context (new EmitContext ());
push_function (function);
ccode.open_switch (new CCodeConstant ("value"));
foreach (var enum_value in en.get_values ()) {
ccode.add_case (new CCodeIdentifier (get_ccode_name (enum_value)));
ccode.add_return (new CCodeConstant ("\""+get_ccode_name (enum_value)+"\""));
}
ccode.close ();
ccode.add_return (new CCodeConstant ("NULL"));
// append to file
cfile.add_function_declaration (function);
cfile.add_function (function);
pop_context ();
return to_string_func;
}
}
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