ch-typeprint.c   [plain text]

/* Support for printing Chill types for GDB, the GNU debugger.
   Copyright 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 2000
   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 2 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, write to the Free Software
   Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#include "defs.h"
#include "obstack.h"
#include "bfd.h"		/* Binary File Description */
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "gdbcore.h"
#include "target.h"
#include "language.h"
#include "ch-lang.h"
#include "typeprint.h"

#include "gdb_string.h"
#include <errno.h>

static void chill_type_print_base (struct type *, struct ui_file *, int, int);

void
chill_print_type (struct type *type, char *varstring, struct ui_file *stream,
		  int show, int level)
{
  if (varstring != NULL && *varstring != '\0')
    {
      fputs_filtered (varstring, stream);
      fputs_filtered (" ", stream);
    }
  chill_type_print_base (type, stream, show, level);
}

/* Print the name of the type (or the ultimate pointer target,
   function value or array element).

   SHOW nonzero means don't print this type as just its name;
   show its real definition even if it has a name.
   SHOW zero means print just typename or tag if there is one
   SHOW negative means abbreviate structure elements.
   SHOW is decremented for printing of structure elements.

   LEVEL is the depth to indent by.
   We increase it for some recursive calls.  */

static void
chill_type_print_base (struct type *type, struct ui_file *stream, int show,
		       int level)
{
  register int len;
  register int i;
  struct type *index_type;
  struct type *range_type;
  LONGEST low_bound;
  LONGEST high_bound;

  QUIT;

  wrap_here ("    ");
  if (type == NULL)
    {
      fputs_filtered ("<type unknown>", stream);
      return;
    }

  /* When SHOW is zero or less, and there is a valid type name, then always
     just print the type name directly from the type. */

  if ((show <= 0) && (TYPE_NAME (type) != NULL))
    {
      fputs_filtered (TYPE_NAME (type), stream);
      return;
    }

  if (TYPE_CODE (type) != TYPE_CODE_TYPEDEF)
    CHECK_TYPEDEF (type);

  switch (TYPE_CODE (type))
    {
    case TYPE_CODE_TYPEDEF:
      chill_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
      break;
    case TYPE_CODE_PTR:
      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_VOID)
	{
	  fprintf_filtered (stream,
			    TYPE_NAME (type) ? TYPE_NAME (type) : "PTR");
	  break;
	}
      fprintf_filtered (stream, "REF ");
      chill_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
      break;

    case TYPE_CODE_BOOL:
      /* FIXME: we should probably just print the TYPE_NAME, in case
         anyone ever fixes the compiler to give us the real names
         in the presence of the chill equivalent of typedef (assuming
         there is one).  */
      fprintf_filtered (stream,
			TYPE_NAME (type) ? TYPE_NAME (type) : "BOOL");
      break;

    case TYPE_CODE_ARRAY:
      fputs_filtered ("ARRAY (", stream);
      range_type = TYPE_FIELD_TYPE (type, 0);
      if (TYPE_CODE (range_type) != TYPE_CODE_RANGE)
	chill_print_type (range_type, "", stream, 0, level);
      else
	{
	  index_type = TYPE_TARGET_TYPE (range_type);
	  low_bound = TYPE_FIELD_BITPOS (range_type, 0);
	  high_bound = TYPE_FIELD_BITPOS (range_type, 1);
	  print_type_scalar (index_type, low_bound, stream);
	  fputs_filtered (":", stream);
	  print_type_scalar (index_type, high_bound, stream);
	}
      fputs_filtered (") ", stream);
      chill_print_type (TYPE_TARGET_TYPE (type), "", stream, 0, level);
      break;

    case TYPE_CODE_BITSTRING:
      fprintf_filtered (stream, "BOOLS (%d)",
		      TYPE_FIELD_BITPOS (TYPE_FIELD_TYPE (type, 0), 1) + 1);
      break;

    case TYPE_CODE_SET:
      fputs_filtered ("POWERSET ", stream);
      chill_print_type (TYPE_INDEX_TYPE (type), "", stream,
			show - 1, level);
      break;

    case TYPE_CODE_STRING:
      range_type = TYPE_FIELD_TYPE (type, 0);
      index_type = TYPE_TARGET_TYPE (range_type);
      high_bound = TYPE_FIELD_BITPOS (range_type, 1);
      fputs_filtered ("CHARS (", stream);
      print_type_scalar (index_type, high_bound + 1, stream);
      fputs_filtered (")", stream);
      break;

    case TYPE_CODE_MEMBER:
      fprintf_filtered (stream, "MEMBER ");
      chill_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
      break;
    case TYPE_CODE_REF:
      fprintf_filtered (stream, "/*LOC*/ ");
      chill_type_print_base (TYPE_TARGET_TYPE (type), stream, show, level);
      break;
    case TYPE_CODE_FUNC:
      fprintf_filtered (stream, "PROC (");
      len = TYPE_NFIELDS (type);
      for (i = 0; i < len; i++)
	{
	  struct type *param_type = TYPE_FIELD_TYPE (type, i);
	  if (i > 0)
	    {
	      fputs_filtered (", ", stream);
	      wrap_here ("    ");
	    }
	  if (TYPE_CODE (param_type) == TYPE_CODE_REF)
	    {
	      chill_type_print_base (TYPE_TARGET_TYPE (param_type),
				     stream, 0, level);
	      fputs_filtered (" LOC", stream);
	    }
	  else
	    chill_type_print_base (param_type, stream, show, level);
	}
      fprintf_filtered (stream, ")");
      if (TYPE_CODE (TYPE_TARGET_TYPE (type)) != TYPE_CODE_VOID)
	{
	  fputs_filtered (" RETURNS (", stream);
	  chill_type_print_base (TYPE_TARGET_TYPE (type), stream, 0, level);
	  fputs_filtered (")", stream);
	}
      break;

    case TYPE_CODE_STRUCT:
      if (chill_varying_type (type))
	{
	  chill_type_print_base (TYPE_FIELD_TYPE (type, 1),
				 stream, 0, level);
	  fputs_filtered (" VARYING", stream);
	}
      else
	{
	  fprintf_filtered (stream, "STRUCT ");

	  fprintf_filtered (stream, "(\n");
	  if ((TYPE_NFIELDS (type) == 0) && (TYPE_NFN_FIELDS (type) == 0))
	    {
	      if (TYPE_STUB (type))
		{
		  fprintfi_filtered (level + 4, stream, "<incomplete type>\n");
		}
	      else
		{
		  fprintfi_filtered (level + 4, stream, "<no data fields>\n");
		}
	    }
	  else
	    {
	      len = TYPE_NFIELDS (type);
	      for (i = TYPE_N_BASECLASSES (type); i < len; i++)
		{
		  struct type *field_type = TYPE_FIELD_TYPE (type, i);
		  QUIT;
		  print_spaces_filtered (level + 4, stream);
		  if (TYPE_CODE (field_type) == TYPE_CODE_UNION)
		    {
		      int j;	/* variant number */
		      fputs_filtered ("CASE OF\n", stream);
		      for (j = 0; j < TYPE_NFIELDS (field_type); j++)
			{
			  int k;	/* variant field index */
			  struct type *variant_type
			  = TYPE_FIELD_TYPE (field_type, j);
			  int var_len = TYPE_NFIELDS (variant_type);
			  print_spaces_filtered (level + 4, stream);
			  if (strcmp (TYPE_FIELD_NAME (field_type, j),
				      "else") == 0)
			    fputs_filtered ("ELSE\n", stream);
			  else
			    fputs_filtered (":\n", stream);
			  if (TYPE_CODE (variant_type) != TYPE_CODE_STRUCT)
			    error ("variant record confusion");
			  for (k = 0; k < var_len; k++)
			    {
			      print_spaces_filtered (level + 8, stream);
			      chill_print_type (TYPE_FIELD_TYPE (variant_type, k),
					  TYPE_FIELD_NAME (variant_type, k),
						stream, show - 1, level + 8);
			      if (k < (var_len - 1))
				fputs_filtered (",", stream);
			      fputs_filtered ("\n", stream);
			    }
			}
		      print_spaces_filtered (level + 4, stream);
		      fputs_filtered ("ESAC", stream);
		    }
		  else
		    chill_print_type (field_type,
				      TYPE_FIELD_NAME (type, i),
				      stream, show - 1, level + 4);
		  if (i < (len - 1))
		    {
		      fputs_filtered (",", stream);
		    }
		  fputs_filtered ("\n", stream);
		}
	    }
	  fprintfi_filtered (level, stream, ")");
	}
      break;

    case TYPE_CODE_RANGE:
      {
	struct type *target = TYPE_TARGET_TYPE (type);
	if (target && TYPE_NAME (target))
	  fputs_filtered (TYPE_NAME (target), stream);
	else
	  fputs_filtered ("RANGE", stream);
	if (target == NULL)
	  target = builtin_type_long;
	fputs_filtered (" (", stream);
	print_type_scalar (target, TYPE_LOW_BOUND (type), stream);
	fputs_filtered (":", stream);
	print_type_scalar (target, TYPE_HIGH_BOUND (type), stream);
	fputs_filtered (")", stream);
      }
      break;

    case TYPE_CODE_ENUM:
      {
	register int lastval = 0;
	fprintf_filtered (stream, "SET (");
	len = TYPE_NFIELDS (type);
	for (i = 0; i < len; i++)
	  {
	    QUIT;
	    if (i)
	      fprintf_filtered (stream, ", ");
	    wrap_here ("    ");
	    fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
	    if (lastval != TYPE_FIELD_BITPOS (type, i))
	      {
		fprintf_filtered (stream, " = %d", TYPE_FIELD_BITPOS (type, i));
		lastval = TYPE_FIELD_BITPOS (type, i);
	      }
	    lastval++;
	  }
	fprintf_filtered (stream, ")");
      }
      break;

    case TYPE_CODE_VOID:
    case TYPE_CODE_UNDEF:
    case TYPE_CODE_ERROR:
    case TYPE_CODE_UNION:
    case TYPE_CODE_METHOD:
      error ("missing language support in chill_type_print_base");
      break;

    default:

      /* Handle types not explicitly handled by the other cases,
         such as fundamental types.  For these, just print whatever
         the type name is, as recorded in the type itself.  If there
         is no type name, then complain. */

      if (TYPE_NAME (type) != NULL)
	{
	  fputs_filtered (TYPE_NAME (type), stream);
	}
      else
	{
	  error ("Unrecognized type code (%d) in symbol table.",
		 TYPE_CODE (type));
	}
      break;
    }
}