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/* Support for printing D values for GDB, the GNU debugger.
Copyright (C) 2008-2020 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 "gdbtypes.h"
#include "gdbcore.h"
#include "d-lang.h"
#include "c-lang.h"
/* Assuming that TYPE is a TYPE_CODE_STRUCT, verify that TYPE is a
dynamic array, and then print its value to STREAM. Return zero if
TYPE is a dynamic array, non-zero otherwise. */
static int
dynamic_array_type (struct type *type,
LONGEST embedded_offset, CORE_ADDR address,
struct ui_file *stream, int recurse,
struct value *val,
const struct value_print_options *options)
{
if (TYPE_NFIELDS (type) == 2
&& TYPE_CODE (TYPE_FIELD_TYPE (type, 0)) == TYPE_CODE_INT
&& strcmp (TYPE_FIELD_NAME (type, 0), "length") == 0
&& strcmp (TYPE_FIELD_NAME (type, 1), "ptr") == 0
&& !value_bits_any_optimized_out (val,
TARGET_CHAR_BIT * embedded_offset,
TARGET_CHAR_BIT * TYPE_LENGTH (type)))
{
CORE_ADDR addr;
struct type *elttype;
struct type *true_type;
struct type *ptr_type;
struct value *ival;
int length;
const gdb_byte *valaddr = value_contents_for_printing (val);
length = unpack_field_as_long (type, valaddr + embedded_offset, 0);
ptr_type = TYPE_FIELD_TYPE (type, 1);
elttype = check_typedef (TYPE_TARGET_TYPE (ptr_type));
addr = unpack_pointer (ptr_type,
valaddr + TYPE_FIELD_BITPOS (type, 1) / 8
+ embedded_offset);
true_type = check_typedef (elttype);
true_type = lookup_array_range_type (true_type, 0, length - 1);
ival = value_at (true_type, addr);
true_type = value_type (ival);
d_value_print_inner (ival, stream, recurse + 1, options);
return 0;
}
return 1;
}
/* Implements the la_val_print routine for language D. */
void
d_val_print (struct type *type, int embedded_offset,
CORE_ADDR address, struct ui_file *stream, int recurse,
struct value *val,
const struct value_print_options *options)
{
int ret;
type = check_typedef (type);
switch (TYPE_CODE (type))
{
case TYPE_CODE_STRUCT:
ret = dynamic_array_type (type, embedded_offset, address,
stream, recurse, val, options);
if (ret == 0)
break;
/* Fall through. */
default:
c_val_print (type, embedded_offset, address, stream,
recurse, val, options);
}
}
/* See d-lang.h. */
void
d_value_print_inner (struct value *val, struct ui_file *stream, int recurse,
const struct value_print_options *options)
{
int ret;
struct type *type = check_typedef (value_type (val));
switch (TYPE_CODE (type))
{
case TYPE_CODE_STRUCT:
ret = dynamic_array_type (type, value_embedded_offset (val),
value_address (val),
stream, recurse, val, options);
if (ret == 0)
break;
/* Fall through. */
default:
c_value_print_inner (val, stream, recurse, options);
break;
}
}
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