[deliverable/binutils-gdb.git] / gdb / cp-valprint.c

/* Support for printing C++ values for GDB, the GNU debugger.
   Copyright 1986, 1988, 1989, 1991 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., 675 Mass Ave, Cambridge, MA 02139, USA.  */

#include "defs.h"
#include "obstack.h"
#include "symtab.h"
#include "gdbtypes.h"
#include "expression.h"
#include "value.h"
#include "command.h"
#include "gdbcmd.h"
#include "demangle.h"

int vtblprint;			/* Controls printing of vtbl's */
int objectprint;		/* Controls looking up an object's derived type
				   using what we find in its vtables.  */
struct obstack dont_print_obstack;

static void
cplus_print_value PARAMS ((struct type *, char *, FILE *, int, int,
			   enum val_prettyprint, struct type **));

/* BEGIN-FIXME:  Hooks into typeprint.c, find a better home for prototypes. */

extern void
c_type_print_base PARAMS ((struct type *, FILE *, int, int));

extern void
c_type_print_varspec_prefix PARAMS ((struct type *, FILE *, int, int));

extern void
cp_type_print_method_args PARAMS ((struct type **, char *, char *, int,
				   FILE *));

extern struct obstack dont_print_obstack;

/* END-FIXME */


/* BEGIN-FIXME:  Hooks into c-valprint.c */

extern int
c_val_print PARAMS ((struct type *, char *, CORE_ADDR, FILE *, int, int, int,
		     enum val_prettyprint));
/* END-FIXME */


void
cp_print_class_method (valaddr, type, stream)
     char *valaddr;
     struct type *type;
     FILE *stream;
{
  struct type *domain;
  struct fn_field *f;
  int j;
  int len2;
  int offset;
  char *kind = "";
  CORE_ADDR addr;
  struct symbol *sym;
  unsigned len;
  unsigned int i;

  domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
  addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
  if (METHOD_PTR_IS_VIRTUAL (addr))
    {
      offset = METHOD_PTR_TO_VOFFSET (addr);
      len = TYPE_NFN_FIELDS (domain);
      for (i = 0; i < len; i++)
	{
	  f = TYPE_FN_FIELDLIST1 (domain, i);
	  len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	  
	  for (j = 0; j < len2; j++)
	    {
	      QUIT;
	      if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
		{
		  kind = "virtual ";
		  goto common;
		}
	    }
	}
    }
  else
    {
      sym = find_pc_function (addr);
      if (sym == 0)
	{
	  error ("invalid pointer to member function");
	}
      len = TYPE_NFN_FIELDS (domain);
      for (i = 0; i < len; i++)
	{
	  f = TYPE_FN_FIELDLIST1 (domain, i);
	  len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	  
	  for (j = 0; j < len2; j++)
	    {
	      QUIT;
	      if (TYPE_FN_FIELD_STUB (f, j))
		check_stub_method (domain, i, j);
	      if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
		{
		  goto common;
		}
	    }
	}
    }
  common:
  if (i < len)
    {
      fprintf_filtered (stream, "&");
      c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
      fprintf (stream, kind);
      if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	  && TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	{
	  cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
				     TYPE_FN_FIELDLIST_NAME (domain, i),
				     0, stream);
	}
      else
	{
	  cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
				     TYPE_FN_FIELDLIST_NAME (domain, i),
				     0, stream);
	}
    }
  else
    {
      fprintf_filtered (stream, "(");
      type_print (type, "", stream, -1);
      fprintf_filtered (stream, ") %d", (int) addr >> 3);
    }
}

/* Return truth value for assertion that TYPE is of the type
   "pointer to virtual function".  */

int
cp_is_vtbl_ptr_type(type)
     struct type *type;
{
  char *typename = type_name_no_tag (type);
  static const char vtbl_ptr_name[] =
    { CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };

  return (typename != NULL && STREQ(typename, vtbl_ptr_name));
}

/* Return truth value for the assertion that TYPE is of the type
   "pointer to virtual function table".  */

int
cp_is_vtbl_member(type)
     struct type *type;
{
  if (TYPE_CODE (type) == TYPE_CODE_PTR)
    type = TYPE_TARGET_TYPE (type);
  else
    return 0;

  if (TYPE_CODE (type) == TYPE_CODE_ARRAY
      && TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)
    /* Virtual functions tables are full of pointers to virtual functions.  */
    return cp_is_vtbl_ptr_type (TYPE_TARGET_TYPE (type));
  return 0;
}

/* Mutually recursive subroutines of cplus_print_value and c_val_print to
   print out a structure's fields: cp_print_value_fields and cplus_print_value.

   TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
   same meanings as in cplus_print_value and c_val_print.

   DONT_PRINT is an array of baseclass types that we
   should not print, or zero if called from top level.  */

void
cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
		       dont_print)
     struct type *type;
     char *valaddr;
     FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print;
{
  int i, len, n_baseclasses;

  check_stub_type (type);

  fprintf_filtered (stream, "{");
  len = TYPE_NFIELDS (type);
  n_baseclasses = TYPE_N_BASECLASSES (type);

  /* Print out baseclasses such that we don't print
     duplicates of virtual baseclasses.  */
  if (n_baseclasses > 0)
    cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
		       dont_print);

  if (!len && n_baseclasses == 1)
    fprintf_filtered (stream, "<No data fields>");
  else
    {
      extern int inspect_it;
      int fields_seen = 0;

      for (i = n_baseclasses; i < len; i++)
	{
	  /* Check if static field */
	  if (TYPE_FIELD_STATIC (type, i))
	    continue;
	  if (fields_seen)
	    fprintf_filtered (stream, ", ");
	  else if (n_baseclasses > 0)
	    {
	      if (pretty)
		{
		  fprintf_filtered (stream, "\n");
		  print_spaces_filtered (2 + 2 * recurse, stream);
		  fputs_filtered ("members of ", stream);
		  fputs_filtered (type_name_no_tag (type), stream);
		  fputs_filtered (": ", stream);
		}
	    }
	  fields_seen = 1;

	  if (pretty)
	    {
	      fprintf_filtered (stream, "\n");
	      print_spaces_filtered (2 + 2 * recurse, stream);
	    }
	  else 
	    {
	      wrap_here (n_spaces (2 + 2 * recurse));
	    }
	  if (inspect_it)
	    {
	      if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
		fputs_filtered ("\"( ptr \"", stream);
	      else
		fputs_filtered ("\"( nodef \"", stream);
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered ("\" \"", stream);
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered ("\") \"", stream);
	    }
	  else
	    {
	      fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
				       language_cplus,
				       DMGL_PARAMS | DMGL_ANSI);
	      fputs_filtered (" = ", stream);
	    }
	  if (TYPE_FIELD_PACKED (type, i))
	    {
	      value v;

	      /* Bitfields require special handling, especially due to byte
		 order problems.  */
	      v = value_from_longest (TYPE_FIELD_TYPE (type, i),
				   unpack_field_as_long (type, valaddr, i));

	      c_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
			   stream, format, 0, recurse + 1, pretty);
	    }
	  else
	    {
	      c_val_print (TYPE_FIELD_TYPE (type, i), 
			   valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
			   0, stream, format, 0, recurse + 1, pretty);
	    }
	}
      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
    }
  fprintf_filtered (stream, "}");
}

/* Special val_print routine to avoid printing multiple copies of virtual
   baseclasses.  */

static void
cplus_print_value (type, valaddr, stream, format, recurse, pretty, dont_print)
     struct type *type;
     char *valaddr;
     FILE *stream;
     int format;
     int recurse;
     enum val_prettyprint pretty;
     struct type **dont_print;
{
  struct obstack tmp_obstack;
  struct type **last_dont_print
    = (struct type **)obstack_next_free (&dont_print_obstack);
  int i, n_baseclasses = TYPE_N_BASECLASSES (type);

  if (dont_print == 0)
    {
      /* If we're at top level, carve out a completely fresh
	 chunk of the obstack and use that until this particular
	 invocation returns.  */
      tmp_obstack = dont_print_obstack;
      /* Bump up the high-water mark.  Now alpha is omega.  */
      obstack_finish (&dont_print_obstack);
    }

  for (i = 0; i < n_baseclasses; i++)
    {
      char *baddr;
      int err;

      if (BASETYPE_VIA_VIRTUAL (type, i))
	{
	  struct type **first_dont_print
	    = (struct type **)obstack_base (&dont_print_obstack);

	  int j = (struct type **)obstack_next_free (&dont_print_obstack)
	    - first_dont_print;

	  while (--j >= 0)
	    if (TYPE_BASECLASS (type, i) == first_dont_print[j])
	      goto flush_it;

	  obstack_ptr_grow (&dont_print_obstack, TYPE_BASECLASS (type, i));
	}

      /* Fix to use baseclass_offset instead. FIXME */
      baddr = baseclass_addr (type, i, valaddr, 0, &err);
      if (err == 0 && baddr == 0)
	error ("could not find virtual baseclass `%s'\n",
	       type_name_no_tag (TYPE_BASECLASS (type, i)));

      if (pretty)
	{
	  fprintf_filtered (stream, "\n");
	  print_spaces_filtered (2 * recurse, stream);
	}
      fputs_filtered ("<", stream);
      fputs_filtered (type_name_no_tag (TYPE_BASECLASS (type, i)), stream);
      fputs_filtered ("> = ", stream);
      if (err != 0)
	fprintf_filtered (stream, "<invalid address 0x%x>", baddr);
      else
	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
			       recurse, pretty,
			       (struct type **) obstack_base (&dont_print_obstack));
      fputs_filtered (", ", stream);

    flush_it:
      ;
    }

  if (dont_print == 0)
    {
      /* Free the space used to deal with the printing
	 of this type from top level.  */
      obstack_free (&dont_print_obstack, last_dont_print);
      /* Reset watermark so that we can continue protecting
	 ourselves from whatever we were protecting ourselves.  */
      dont_print_obstack = tmp_obstack;
    }
}

void
cp_print_class_member (valaddr, domain, stream, prefix)
     char *valaddr;
     struct type *domain;
     FILE *stream;
     char *prefix;
{
  
  /* VAL is a byte offset into the structure type DOMAIN.
     Find the name of the field for that offset and
     print it.  */
  int extra = 0;
  int bits = 0;
  register unsigned int i;
  unsigned len = TYPE_NFIELDS (domain);
  /* @@ Make VAL into bit offset */
  LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
  for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
    {
      int bitpos = TYPE_FIELD_BITPOS (domain, i);
      QUIT;
      if (val == bitpos)
	break;
      if (val < bitpos && i != 0)
	{
	  /* Somehow pointing into a field.  */
	  i -= 1;
	  extra = (val - TYPE_FIELD_BITPOS (domain, i));
	  if (extra & 0x7)
	    bits = 1;
	  else
	    extra >>= 3;
	  break;
	}
    }
  if (i < len)
    {
      char *name;
      fprintf_filtered (stream, prefix);
      name = type_name_no_tag (domain);
      if (name)
        fputs_filtered (name, stream);
      else
	c_type_print_base (domain, stream, 0, 0);
      fprintf_filtered (stream, "::");
      fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
      if (extra)
	fprintf_filtered (stream, " + %d bytes", extra);
      if (bits)
	fprintf_filtered (stream, " (offset in bits)");
    }
  else
    fprintf_filtered (stream, "%d", val >> 3);
}

void
_initialize_cp_valprint ()
{
  add_show_from_set
    (add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
		  "Set printing of C++ virtual function tables.",
		  &setprintlist),
     &showprintlist);

  add_show_from_set
    (add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
	  "Set printing of object's derived type based on vtable info.",
		  &setprintlist),
     &showprintlist);

  /* Give people the defaults which they are used to.  */
  objectprint = 0;
  vtblprint = 0;
  obstack_begin (&dont_print_obstack, 32 * sizeof (struct type *));
}
Commit	Line	Data
a8a69e63 FF	1	/* Support for printing C++ values for GDB, the GNU debugger.
	2	Copyright 1986, 1988, 1989, 1991 Free Software Foundation, Inc.
	3
	4	This file is part of GDB.
	5
	6	This program is free software; you can redistribute it and/or modify
	7	it under the terms of the GNU General Public License as published by
	8	the Free Software Foundation; either version 2 of the License, or
	9	(at your option) any later version.
	10
	11	This program is distributed in the hope that it will be useful,
	12	but WITHOUT ANY WARRANTY; without even the implied warranty of
	13	MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
	14	GNU General Public License for more details.
	15
	16	You should have received a copy of the GNU General Public License
	17	along with this program; if not, write to the Free Software
	18	Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA. */
	19
	20	#include "defs.h"
	21	#include "obstack.h"
	22	#include "symtab.h"
	23	#include "gdbtypes.h"
	24	#include "expression.h"
	25	#include "value.h"
	26	#include "command.h"
	27	#include "gdbcmd.h"
5e81259d	28	#include "demangle.h"
a8a69e63 FF	29
	30	int vtblprint; /* Controls printing of vtbl's */
	31	int objectprint; /* Controls looking up an object's derived type
	32	using what we find in its vtables. */
	33	struct obstack dont_print_obstack;
	34
	35	static void
	36	cplus_print_value PARAMS ((struct type , char , FILE *, int, int,
	37	enum val_prettyprint, struct type **));
	38
	39	/* BEGIN-FIXME: Hooks into typeprint.c, find a better home for prototypes. */
	40
	41	extern void
	42	c_type_print_base PARAMS ((struct type , FILE , int, int));
	43
	44	extern void
	45	c_type_print_varspec_prefix PARAMS ((struct type , FILE , int, int));
	46
	47	extern void
	48	cp_type_print_method_args PARAMS ((struct type *, char , char *, int,
	49	FILE *));
	50
	51	extern struct obstack dont_print_obstack;
	52
	53	/* END-FIXME */
	54
	55
	56	/* BEGIN-FIXME: Hooks into c-valprint.c */
	57
	58	extern int
	59	c_val_print PARAMS ((struct type , char , CORE_ADDR, FILE *, int, int, int,
	60	enum val_prettyprint));
	61	/* END-FIXME */
	62
	63
c7da3ed3 FF	64	void
	65	cp_print_class_method (valaddr, type, stream)
	66	char *valaddr;
	67	struct type *type;
	68	FILE *stream;
	69	{
	70	struct type *domain;
	71	struct fn_field *f;
	72	int j;
	73	int len2;
	74	int offset;
	75	char *kind = "";
	76	CORE_ADDR addr;
	77	struct symbol *sym;
	78	unsigned len;
	79	unsigned int i;
	80
	81	domain = TYPE_DOMAIN_TYPE (TYPE_TARGET_TYPE (type));
	82	addr = unpack_pointer (lookup_pointer_type (builtin_type_void), valaddr);
	83	if (METHOD_PTR_IS_VIRTUAL (addr))
	84	{
	85	offset = METHOD_PTR_TO_VOFFSET (addr);
	86	len = TYPE_NFN_FIELDS (domain);
	87	for (i = 0; i < len; i++)
	88	{
	89	f = TYPE_FN_FIELDLIST1 (domain, i);
	90	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	91
	92	for (j = 0; j < len2; j++)
	93	{
	94	QUIT;
	95	if (TYPE_FN_FIELD_VOFFSET (f, j) == offset)
	96	{
	97	kind = "virtual ";
	98	goto common;
	99	}
	100	}
	101	}
	102	}
	103	else
	104	{
	105	sym = find_pc_function (addr);
	106	if (sym == 0)
	107	{
	108	error ("invalid pointer to member function");
	109	}
	110	len = TYPE_NFN_FIELDS (domain);
	111	for (i = 0; i < len; i++)
	112	{
	113	f = TYPE_FN_FIELDLIST1 (domain, i);
	114	len2 = TYPE_FN_FIELDLIST_LENGTH (domain, i);
	115
	116	for (j = 0; j < len2; j++)
	117	{
	118	QUIT;
39cb3d04 PS	119	if (TYPE_FN_FIELD_STUB (f, j))
39cb3d04 PS	120	check_stub_method (domain, i, j);
c7da3ed3 FF	121	if (STREQ (SYMBOL_NAME (sym), TYPE_FN_FIELD_PHYSNAME (f, j)))
	122	{
	123	goto common;
	124	}
	125	}
	126	}
	127	}
	128	common:
	129	if (i < len)
	130	{
	131	fprintf_filtered (stream, "&");
	132	c_type_print_varspec_prefix (TYPE_FN_FIELD_TYPE (f, j), stream, 0, 0);
	133	fprintf (stream, kind);
	134	if (TYPE_FN_FIELD_PHYSNAME (f, j)[0] == '_'
	135	&& TYPE_FN_FIELD_PHYSNAME (f, j)[1] == CPLUS_MARKER)
	136	{
	137	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j) + 1, "~",
	138	TYPE_FN_FIELDLIST_NAME (domain, i),
	139	0, stream);
	140	}
	141	else
	142	{
	143	cp_type_print_method_args (TYPE_FN_FIELD_ARGS (f, j), "",
	144	TYPE_FN_FIELDLIST_NAME (domain, i),
	145	0, stream);
	146	}
	147	}
	148	else
	149	{
	150	fprintf_filtered (stream, "(");
	151	type_print (type, "", stream, -1);
	152	fprintf_filtered (stream, ") %d", (int) addr >> 3);
	153	}
	154	}
	155
a8a69e63 FF	156	/* Return truth value for assertion that TYPE is of the type
	157	"pointer to virtual function". */
	158
	159	int
	160	cp_is_vtbl_ptr_type(type)
	161	struct type *type;
	162	{
	163	char *typename = type_name_no_tag (type);
	164	static const char vtbl_ptr_name[] =
	165	{ CPLUS_MARKER,'v','t','b','l','_','p','t','r','_','t','y','p','e', 0 };
	166
2e4964ad	167	return (typename != NULL && STREQ(typename, vtbl_ptr_name));
a8a69e63 FF	168	}
	169
	170	/* Return truth value for the assertion that TYPE is of the type
	171	"pointer to virtual function table". */
	172
	173	int
	174	cp_is_vtbl_member(type)
	175	struct type *type;
	176	{
	177	if (TYPE_CODE (type) == TYPE_CODE_PTR)
	178	type = TYPE_TARGET_TYPE (type);
	179	else
	180	return 0;
	181
	182	if (TYPE_CODE (type) == TYPE_CODE_ARRAY
	183	&& TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_STRUCT)
	184	/* Virtual functions tables are full of pointers to virtual functions. */
	185	return cp_is_vtbl_ptr_type (TYPE_TARGET_TYPE (type));
	186	return 0;
	187	}
	188
	189	/* Mutually recursive subroutines of cplus_print_value and c_val_print to
	190	print out a structure's fields: cp_print_value_fields and cplus_print_value.
	191
	192	TYPE, VALADDR, STREAM, RECURSE, and PRETTY have the
	193	same meanings as in cplus_print_value and c_val_print.
	194
	195	DONT_PRINT is an array of baseclass types that we
	196	should not print, or zero if called from top level. */
	197
	198	void
	199	cp_print_value_fields (type, valaddr, stream, format, recurse, pretty,
	200	dont_print)
	201	struct type *type;
	202	char *valaddr;
	203	FILE *stream;
	204	int format;
	205	int recurse;
	206	enum val_prettyprint pretty;
	207	struct type **dont_print;
	208	{
	209	int i, len, n_baseclasses;
	210
	211	check_stub_type (type);
	212
	213	fprintf_filtered (stream, "{");
	214	len = TYPE_NFIELDS (type);
	215	n_baseclasses = TYPE_N_BASECLASSES (type);
	216
	217	/* Print out baseclasses such that we don't print
	218	duplicates of virtual baseclasses. */
	219	if (n_baseclasses > 0)
	220	cplus_print_value (type, valaddr, stream, format, recurse+1, pretty,
	221	dont_print);
	222
	223	if (!len && n_baseclasses == 1)
	224	fprintf_filtered (stream, "<No data fields>");
	225	else
	226	{
	227	extern int inspect_it;
	228	int fields_seen = 0;
	229
	230	for (i = n_baseclasses; i < len; i++)
	231	{
232	/* Check if static field */
233	if (TYPE_FIELD_STATIC (type, i))
234	continue;
235	if (fields_seen)
236	fprintf_filtered (stream, ", ");
237	else if (n_baseclasses > 0)
238	{
239	if (pretty)
240	{
241	fprintf_filtered (stream, "\n");
242	print_spaces_filtered (2 + 2 * recurse, stream);
243	fputs_filtered ("members of ", stream);
244	fputs_filtered (type_name_no_tag (type), stream);
245	fputs_filtered (": ", stream);
246	}
247	}
248	fields_seen = 1;
249
250	if (pretty)
251	{
252	fprintf_filtered (stream, "\n");
253	print_spaces_filtered (2 + 2 * recurse, stream);
254	}
255	else
256	{
257	wrap_here (n_spaces (2 + 2 * recurse));
258	}
259	if (inspect_it)
260	{
261	if (TYPE_CODE (TYPE_FIELD_TYPE (type, i)) == TYPE_CODE_PTR)
262	fputs_filtered ("\"( ptr \"", stream);
263	else
264	fputs_filtered ("\"( nodef \"", stream);
5e81259d FF	265	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	266	language_cplus,
	267	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63	268	fputs_filtered ("\" \"", stream);
5e81259d FF	269	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	270	language_cplus,
	271	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	272	fputs_filtered ("\") \"", stream);
	273	}
	274	else
	275	{
5e81259d FF	276	fprintf_symbol_filtered (stream, TYPE_FIELD_NAME (type, i),
	277	language_cplus,
	278	DMGL_PARAMS \| DMGL_ANSI);
a8a69e63 FF	279	fputs_filtered (" = ", stream);
	280	}
	281	if (TYPE_FIELD_PACKED (type, i))
	282	{
	283	value v;
	284
	285	/* Bitfields require special handling, especially due to byte
	286	order problems. */
	287	v = value_from_longest (TYPE_FIELD_TYPE (type, i),
	288	unpack_field_as_long (type, valaddr, i));
	289
	290	c_val_print (TYPE_FIELD_TYPE (type, i), VALUE_CONTENTS (v), 0,
	291	stream, format, 0, recurse + 1, pretty);
	292	}
	293	else
	294	{
	295	c_val_print (TYPE_FIELD_TYPE (type, i),
	296	valaddr + TYPE_FIELD_BITPOS (type, i) / 8,
	297	0, stream, format, 0, recurse + 1, pretty);
	298	}
	299	}
	300	if (pretty)
	301	{
	302	fprintf_filtered (stream, "\n");
	303	print_spaces_filtered (2 * recurse, stream);
	304	}
	305	}
	306	fprintf_filtered (stream, "}");
	307	}
	308
	309	/* Special val_print routine to avoid printing multiple copies of virtual
	310	baseclasses. */
	311
	312	static void
	313	cplus_print_value (type, valaddr, stream, format, recurse, pretty, dont_print)
	314	struct type *type;
	315	char *valaddr;
	316	FILE *stream;
	317	int format;
	318	int recurse;
	319	enum val_prettyprint pretty;
	320	struct type **dont_print;
	321	{
	322	struct obstack tmp_obstack;
	323	struct type **last_dont_print
	324	= (struct type **)obstack_next_free (&dont_print_obstack);
	325	int i, n_baseclasses = TYPE_N_BASECLASSES (type);
	326
	327	if (dont_print == 0)
	328	{
	329	/* If we're at top level, carve out a completely fresh
	330	chunk of the obstack and use that until this particular
	331	invocation returns. */
	332	tmp_obstack = dont_print_obstack;
	333	/* Bump up the high-water mark. Now alpha is omega. */
	334	obstack_finish (&dont_print_obstack);
	335	}
	336
	337	for (i = 0; i < n_baseclasses; i++)
	338	{
	339	char *baddr;
	340	int err;
	341
	342	if (BASETYPE_VIA_VIRTUAL (type, i))
343	{
344	struct type **first_dont_print
345	= (struct type **)obstack_base (&dont_print_obstack);
346
347	int j = (struct type **)obstack_next_free (&dont_print_obstack)
348	- first_dont_print;
349
350	while (--j >= 0)
351	if (TYPE_BASECLASS (type, i) == first_dont_print[j])
352	goto flush_it;
353
354	obstack_ptr_grow (&dont_print_obstack, TYPE_BASECLASS (type, i));
355	}
356
357	/* Fix to use baseclass_offset instead. FIXME */
358	baddr = baseclass_addr (type, i, valaddr, 0, &err);
359	if (err == 0 && baddr == 0)
360	error ("could not find virtual baseclass `%s'\n",
361	type_name_no_tag (TYPE_BASECLASS (type, i)));
362
363	if (pretty)
364	{
365	fprintf_filtered (stream, "\n");
366	print_spaces_filtered (2 * recurse, stream);
367	}
368	fputs_filtered ("<", stream);
369	fputs_filtered (type_name_no_tag (TYPE_BASECLASS (type, i)), stream);
370	fputs_filtered ("> = ", stream);
371	if (err != 0)
372	fprintf_filtered (stream, "<invalid address 0x%x>", baddr);
373	else
374	cp_print_value_fields (TYPE_BASECLASS (type, i), baddr, stream, format,
375	recurse, pretty,
376	(struct type **) obstack_base (&dont_print_obstack));
377	fputs_filtered (", ", stream);
378
379	flush_it:
380	;
381	}
382
383	if (dont_print == 0)
384	{
385	/* Free the space used to deal with the printing
386	of this type from top level. */
387	obstack_free (&dont_print_obstack, last_dont_print);
388	/* Reset watermark so that we can continue protecting
389	ourselves from whatever we were protecting ourselves. */
390	dont_print_obstack = tmp_obstack;
391	}
392	}
393
394	void
395	cp_print_class_member (valaddr, domain, stream, prefix)
396	char *valaddr;
397	struct type *domain;
398	FILE *stream;
399	char *prefix;
400	{
401
402	/* VAL is a byte offset into the structure type DOMAIN.
403	Find the name of the field for that offset and
404	print it. */
405	int extra = 0;
406	int bits = 0;
407	register unsigned int i;
408	unsigned len = TYPE_NFIELDS (domain);
409	/* @@ Make VAL into bit offset */
410	LONGEST val = unpack_long (builtin_type_int, valaddr) << 3;
411	for (i = TYPE_N_BASECLASSES (domain); i < len; i++)
412	{
413	int bitpos = TYPE_FIELD_BITPOS (domain, i);
414	QUIT;
415	if (val == bitpos)
416	break;
417	if (val < bitpos && i != 0)
418	{
419	/* Somehow pointing into a field. */
420	i -= 1;
421	extra = (val - TYPE_FIELD_BITPOS (domain, i));
422	if (extra & 0x7)
423	bits = 1;
424	else
425	extra >>= 3;
426	break;
427	}
428	}
429	if (i < len)
430	{
431	char *name;
432	fprintf_filtered (stream, prefix);
433	name = type_name_no_tag (domain);
434	if (name)
435	fputs_filtered (name, stream);
436	else
437	c_type_print_base (domain, stream, 0, 0);
438	fprintf_filtered (stream, "::");
439	fputs_filtered (TYPE_FIELD_NAME (domain, i), stream);
440	if (extra)
441	fprintf_filtered (stream, " + %d bytes", extra);
442	if (bits)
443	fprintf_filtered (stream, " (offset in bits)");
444	}
445	else
446	fprintf_filtered (stream, "%d", val >> 3);
447	}
448
449	void
450	_initialize_cp_valprint ()
451	{
452	add_show_from_set
453	(add_set_cmd ("vtbl", class_support, var_boolean, (char *)&vtblprint,
454	"Set printing of C++ virtual function tables.",
455	&setprintlist),
456	&showprintlist);
457
458	add_show_from_set
459	(add_set_cmd ("object", class_support, var_boolean, (char *)&objectprint,
460	"Set printing of object's derived type based on vtable info.",
461	&setprintlist),
462	&showprintlist);
463
464	/* Give people the defaults which they are used to. */
465	objectprint = 0;
466	vtblprint = 0;
467	obstack_begin (&dont_print_obstack, 32 * sizeof (struct type *));
468	}