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/* Support for printing D values for GDB, the GNU debugger.

   Copyright (C) 2008, 2009, 2010 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

   the number of string characters printed, or -1 if TYPE is not

   a dynamic array.  */

static int

dynamic_array_type (struct type *type, const gdb_byte *valaddr,

                    int embedded_offset, CORE_ADDR address,

                    struct ui_file *stream, int recurse,

                    const 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_valid (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;

      const gdb_byte *ptraddr;

      struct value *val;

      int length;

      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);

      val = value_at (true_type, addr);

      ptraddr = value_contents (val);

      return d_val_print (true_type, ptraddr, 0, addr, stream, recurse + 1,

                          NULL, options);

    }

  return -1;

}

/* Implements the la_val_print routine for language D.  */

int

d_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,

             CORE_ADDR address, struct ui_file *stream, int recurse,

             const struct value *val,

             const struct value_print_options *options)

{

  int ret;

  CHECK_TYPEDEF (type);

  switch (TYPE_CODE (type))

    {

      case TYPE_CODE_STRUCT:

        ret = dynamic_array_type (type, valaddr, embedded_offset, address,

                                  stream, recurse, val, options);

        if (ret != -1)

           break;

      default:

        ret = c_val_print (type, valaddr, embedded_offset, address, stream,

                           recurse, val, options);

    }

  return ret;

}