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/* Type stack for GDB parser.
Copyright (C) 1986-2023 Free Software Foundation, Inc.
This file is part of GDB.
This program is free software; you can redistribute it and/or modify
it under the terms of the GNU General Public License as published by
the Free Software Foundation; either version 3 of the License, or
(at your option) any later version.
This program 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 General Public License for more details.
You should have received a copy of the GNU General Public License
along with this program. If not, see <http://www.gnu.org/licenses/>. */
#include "defs.h"
#include "type-stack.h"
#include "gdbtypes.h"
#include "parser-defs.h"
/* See type-stack.h. */
void
type_stack::insert (enum type_pieces tp)
{
union type_stack_elt element;
int slot;
gdb_assert (tp == tp_pointer || tp == tp_reference
|| tp == tp_rvalue_reference || tp == tp_const
|| tp == tp_volatile || tp == tp_restrict
|| tp == tp_atomic);
/* If there is anything on the stack (we know it will be a
tp_pointer), insert the qualifier above it. Otherwise, simply
push this on the top of the stack. */
if (!m_elements.empty () && (tp == tp_const || tp == tp_volatile
|| tp == tp_restrict))
slot = 1;
else
slot = 0;
element.piece = tp;
insert_into (slot, element);
}
/* See type-stack.h. */
void
type_stack::insert (struct expr_builder *pstate, const char *string)
{
union type_stack_elt element;
int slot;
/* If there is anything on the stack (we know it will be a
tp_pointer), insert the address space qualifier above it.
Otherwise, simply push this on the top of the stack. */
if (!m_elements.empty ())
slot = 1;
else
slot = 0;
element.piece = tp_space_identifier;
insert_into (slot, element);
element.int_val
= address_space_name_to_type_instance_flags (pstate->gdbarch (),
string);
insert_into (slot, element);
}
/* See type-stack.h. */
type_instance_flags
type_stack::follow_type_instance_flags ()
{
type_instance_flags flags = 0;
for (;;)
switch (pop ())
{
case tp_end:
return flags;
case tp_const:
flags |= TYPE_INSTANCE_FLAG_CONST;
break;
case tp_volatile:
flags |= TYPE_INSTANCE_FLAG_VOLATILE;
break;
case tp_atomic:
flags |= TYPE_INSTANCE_FLAG_ATOMIC;
break;
case tp_restrict:
flags |= TYPE_INSTANCE_FLAG_RESTRICT;
break;
default:
gdb_assert_not_reached ("unrecognized tp_ value in follow_types");
}
}
/* See type-stack.h. */
struct type *
type_stack::follow_types (struct type *follow_type)
{
int done = 0;
int make_const = 0;
int make_volatile = 0;
type_instance_flags make_addr_space = 0;
bool make_restrict = false;
bool make_atomic = false;
int array_size;
while (!done)
switch (pop ())
{
case tp_end:
done = 1;
goto process_qualifiers;
break;
case tp_const:
make_const = 1;
break;
case tp_volatile:
make_volatile = 1;
break;
case tp_space_identifier:
make_addr_space = (enum type_instance_flag_value) pop_int ();
break;
case tp_atomic:
make_atomic = true;
break;
case tp_restrict:
make_restrict = true;
break;
case tp_pointer:
follow_type = lookup_pointer_type (follow_type);
goto process_qualifiers;
case tp_reference:
follow_type = lookup_lvalue_reference_type (follow_type);
goto process_qualifiers;
case tp_rvalue_reference:
follow_type = lookup_rvalue_reference_type (follow_type);
process_qualifiers:
if (make_const)
follow_type = make_cv_type (make_const,
TYPE_VOLATILE (follow_type),
follow_type, 0);
if (make_volatile)
follow_type = make_cv_type (TYPE_CONST (follow_type),
make_volatile,
follow_type, 0);
if (make_addr_space)
follow_type = make_type_with_address_space (follow_type,
make_addr_space);
if (make_restrict)
follow_type = make_restrict_type (follow_type);
if (make_atomic)
follow_type = make_atomic_type (follow_type);
make_const = make_volatile = 0;
make_addr_space = 0;
make_restrict = make_atomic = false;
break;
case tp_array:
array_size = pop_int ();
/* FIXME-type-allocation: need a way to free this type when we are
done with it. */
follow_type =
lookup_array_range_type (follow_type,
0, array_size >= 0 ? array_size - 1 : 0);
if (array_size < 0)
follow_type->bounds ()->high.set_undefined ();
break;
case tp_function:
/* FIXME-type-allocation: need a way to free this type when we are
done with it. */
follow_type = lookup_function_type (follow_type);
break;
case tp_function_with_arguments:
{
std::vector<struct type *> *args = pop_typelist ();
follow_type
= lookup_function_type_with_arguments (follow_type,
args->size (),
args->data ());
}
break;
case tp_type_stack:
{
struct type_stack *stack = pop_type_stack ();
follow_type = stack->follow_types (follow_type);
}
break;
default:
gdb_assert_not_reached ("unrecognized tp_ value in follow_types");
}
return follow_type;
}
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