gdb/c-valprint.c - binutils-gdb - Git at Google

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

    Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
    1998, 1999, 2000, 2001, 2003, 2005, 2006, 2007, 2008
    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 "gdb_string.h"
 #include "symtab.h"
 #include "gdbtypes.h"
 #include "expression.h"
 #include "value.h"
 #include "valprint.h"
 #include "language.h"
 #include "c-lang.h"
 #include "cp-abi.h"
 #include "target.h"


 /* Print function pointer with inferior address ADDRESS onto stdio
    stream STREAM.  */

 static void
 print_function_pointer_address (CORE_ADDR address, struct ui_file *stream,
 				int addressprint)
 {
   CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
 							    address,
 							    &current_target);

   /* If the function pointer is represented by a description, print the
      address of the description.  */
   if (addressprint && func_addr != address)
     {
       fputs_filtered ("@", stream);
       fputs_filtered (paddress (address), stream);
       fputs_filtered (": ", stream);
     }
   print_address_demangle (func_addr, stream, demangle);
 }


 /* Apply a heuristic to decide whether an array of TYPE or a pointer
    to TYPE should be printed as a textual string.  Return non-zero if
    it should, or zero if it should be treated as an array of integers
    or pointer to integers.  FORMAT is the current format letter,
    or 0 if none.

    We guess that "char" is a character.  Explicitly signed and
    unsigned character types are also characters.  Integer data from
    vector types is not.  The user can override this by using the /s
    format letter.  */

 static int
 textual_element_type (struct type *type, char format)
 {
   struct type *true_type = check_typedef (type);

   if (format != 0 && format != 's')
     return 0;

   /* TYPE_CODE_CHAR is always textual.  */
   if (TYPE_CODE (true_type) == TYPE_CODE_CHAR)
     return 1;

   if (format == 's')
     {
       /* Print this as a string if we can manage it.  For now, no
 	 wide character support.  */
       if (TYPE_CODE (true_type) == TYPE_CODE_INT
 	  && TYPE_LENGTH (true_type) == 1)
 	return 1;
     }
   else
     {
       /* If a one-byte TYPE_CODE_INT is missing the not-a-character
 	 flag, then we treat it as text; otherwise, we assume it's
 	 being used as data.  */
       if (TYPE_CODE (true_type) == TYPE_CODE_INT
 	  && TYPE_LENGTH (true_type) == 1
 	  && !TYPE_NOTTEXT (true_type))
 	return 1;
     }

   return 0;
 }


 /* Print data of type TYPE located at VALADDR (within GDB), which came from
    the inferior at address ADDRESS, onto stdio stream STREAM according to
    OPTIONS.  The data at VALADDR is in target byte order.

    If the data are a string pointer, returns the number of string characters
    printed.  */

 int
 c_val_print (struct type *type, const gdb_byte *valaddr, int embedded_offset,
 	     CORE_ADDR address, struct ui_file *stream, int recurse,
 	     const struct value_print_options *options)
 {
   unsigned int i = 0;	/* Number of characters printed */
   unsigned len;
   struct type *elttype;
   unsigned eltlen;
   LONGEST val;
   CORE_ADDR addr;

   CHECK_TYPEDEF (type);
   switch (TYPE_CODE (type))
     {
     case TYPE_CODE_ARRAY:
       elttype = check_typedef (TYPE_TARGET_TYPE (type));
       if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
 	{
 	  eltlen = TYPE_LENGTH (elttype);
 	  len = TYPE_LENGTH (type) / eltlen;
 	  if (options->prettyprint_arrays)
 	    {
 	      print_spaces_filtered (2 + 2 * recurse, stream);
 	    }

 	  /* Print arrays of textual chars with a string syntax.  */
           if (textual_element_type (elttype, options->format))
 	    {
 	      /* If requested, look for the first null char and only print
 	         elements up to it.  */
 	      if (options->stop_print_at_null)
 		{
 		  unsigned int temp_len;

 		  /* Look for a NULL char. */
 		  for (temp_len = 0;
 		       (valaddr + embedded_offset)[temp_len]
 		       && temp_len < len && temp_len < options->print_max;
 		       temp_len++);
 		  len = temp_len;
 		}

 	      LA_PRINT_STRING (stream, valaddr + embedded_offset, len, eltlen, 0, options);
 	      i = len;
 	    }
 	  else
 	    {
 	      fprintf_filtered (stream, "{");
 	      /* If this is a virtual function table, print the 0th
 	         entry specially, and the rest of the members normally.  */
 	      if (cp_is_vtbl_ptr_type (elttype))
 		{
 		  i = 1;
 		  fprintf_filtered (stream, _("%d vtable entries"), len - 1);
 		}
 	      else
 		{
 		  i = 0;
 		}
 	      val_print_array_elements (type, valaddr + embedded_offset, address, stream,
 					recurse, options, i);
 	      fprintf_filtered (stream, "}");
 	    }
 	  break;
 	}
       /* Array of unspecified length: treat like pointer to first elt.  */
       addr = address;
       goto print_unpacked_pointer;

     case TYPE_CODE_MEMBERPTR:
       if (options->format)
 	{
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
 	  break;
 	}
       cp_print_class_member (valaddr + embedded_offset, type, stream, "&");
       break;

     case TYPE_CODE_METHODPTR:
       cplus_print_method_ptr (valaddr + embedded_offset, type, stream);
       break;

     case TYPE_CODE_PTR:
       if (options->format && options->format != 's')
 	{
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
 	  break;
 	}
       if (options->vtblprint && cp_is_vtbl_ptr_type (type))
 	{
 	  /* Print the unmangled name if desired.  */
 	  /* Print vtable entry - we only get here if we ARE using
 	     -fvtable_thunks.  (Otherwise, look under TYPE_CODE_STRUCT.) */
 	  CORE_ADDR addr
 	    = extract_typed_address (valaddr + embedded_offset, type);
 	  print_function_pointer_address (addr, stream, options->addressprint);
 	  break;
 	}
       elttype = check_typedef (TYPE_TARGET_TYPE (type));
 	{
 	  addr = unpack_pointer (type, valaddr + embedded_offset);
 	print_unpacked_pointer:

 	  if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
 	    {
 	      /* Try to print what function it points to.  */
 	      print_function_pointer_address (addr, stream,
 					      options->addressprint);
 	      /* Return value is irrelevant except for string pointers.  */
 	      return (0);
 	    }

 	  if (options->addressprint)
 	    fputs_filtered (paddress (addr), stream);

 	  /* For a pointer to a textual type, also print the string
 	     pointed to, unless pointer is null.  */
 	  /* FIXME: need to handle wchar_t here... */

 	  if (textual_element_type (elttype, options->format)
 	      && addr != 0)
 	    {
 	      i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream,
 				    options);
 	    }
 	  else if (cp_is_vtbl_member (type))
 	    {
 	      /* print vtbl's nicely */
 	      CORE_ADDR vt_address = unpack_pointer (type, valaddr + embedded_offset);

 	      struct minimal_symbol *msymbol =
 	      lookup_minimal_symbol_by_pc (vt_address);
 	      if ((msymbol != NULL) &&
 		  (vt_address == SYMBOL_VALUE_ADDRESS (msymbol)))
 		{
 		  fputs_filtered (" <", stream);
 		  fputs_filtered (SYMBOL_PRINT_NAME (msymbol), stream);
 		  fputs_filtered (">", stream);
 		}
 	      if (vt_address && options->vtblprint)
 		{
 		  struct value *vt_val;
 		  struct symbol *wsym = (struct symbol *) NULL;
 		  struct type *wtype;
 		  struct block *block = (struct block *) NULL;
 		  int is_this_fld;

 		  if (msymbol != NULL)
 		    wsym = lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol), block,
 					  VAR_DOMAIN, &is_this_fld);

 		  if (wsym)
 		    {
 		      wtype = SYMBOL_TYPE (wsym);
 		    }
 		  else
 		    {
 		      wtype = TYPE_TARGET_TYPE (type);
 		    }
 		  vt_val = value_at (wtype, vt_address);
 		  common_val_print (vt_val, stream, recurse + 1, options,
 				    current_language);
 		  if (options->pretty)
 		    {
 		      fprintf_filtered (stream, "\n");
 		      print_spaces_filtered (2 + 2 * recurse, stream);
 		    }
 		}
 	    }

 	  /* Return number of characters printed, including the terminating
 	     '\0' if we reached the end.  val_print_string takes care including
 	     the terminating '\0' if necessary.  */
 	  return i;
 	}
       break;

     case TYPE_CODE_REF:
       elttype = check_typedef (TYPE_TARGET_TYPE (type));
       if (options->addressprint)
 	{
 	  CORE_ADDR addr
 	    = extract_typed_address (valaddr + embedded_offset, type);
 	  fprintf_filtered (stream, "@");
 	  fputs_filtered (paddress (addr), stream);
 	  if (options->deref_ref)
 	    fputs_filtered (": ", stream);
 	}
       /* De-reference the reference.  */
       if (options->deref_ref)
 	{
 	  if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
 	    {
 	      struct value *deref_val =
 	      value_at
 	      (TYPE_TARGET_TYPE (type),
 	       unpack_pointer (type, valaddr + embedded_offset));
 	      common_val_print (deref_val, stream, recurse, options,
 				current_language);
 	    }
 	  else
 	    fputs_filtered ("???", stream);
 	}
       break;

     case TYPE_CODE_UNION:
       if (recurse && !options->unionprint)
 	{
 	  fprintf_filtered (stream, "{...}");
 	  break;
 	}
       /* Fall through.  */
     case TYPE_CODE_STRUCT:
       /*FIXME: Abstract this away */
       if (options->vtblprint && cp_is_vtbl_ptr_type (type))
 	{
 	  /* Print the unmangled name if desired.  */
 	  /* Print vtable entry - we only get here if NOT using
 	     -fvtable_thunks.  (Otherwise, look under TYPE_CODE_PTR.) */
 	  int offset = (embedded_offset +
 			TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8);
 	  struct type *field_type = TYPE_FIELD_TYPE (type, VTBL_FNADDR_OFFSET);
 	  CORE_ADDR addr
 	    = extract_typed_address (valaddr + offset, field_type);

 	  print_function_pointer_address (addr, stream, options->addressprint);
 	}
       else
 	cp_print_value_fields (type, type, valaddr, embedded_offset, address, stream,
 			       recurse, options, NULL, 0);
       break;

     case TYPE_CODE_ENUM:
       if (options->format)
 	{
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
 	  break;
 	}
       len = TYPE_NFIELDS (type);
       val = unpack_long (type, valaddr + embedded_offset);
       for (i = 0; i < len; i++)
 	{
 	  QUIT;
 	  if (val == TYPE_FIELD_BITPOS (type, i))
 	    {
 	      break;
 	    }
 	}
       if (i < len)
 	{
 	  fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
 	}
       else
 	{
 	  print_longest (stream, 'd', 0, val);
 	}
       break;

     case TYPE_CODE_FLAGS:
       if (options->format)
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
       else
 	val_print_type_code_flags (type, valaddr + embedded_offset, stream);
       break;

     case TYPE_CODE_FUNC:
     case TYPE_CODE_METHOD:
       if (options->format)
 	{
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
 	  break;
 	}
       /* FIXME, we should consider, at least for ANSI C language, eliminating
          the distinction made between FUNCs and POINTERs to FUNCs.  */
       fprintf_filtered (stream, "{");
       type_print (type, "", stream, -1);
       fprintf_filtered (stream, "} ");
       /* Try to print what function it points to, and its address.  */
       print_address_demangle (address, stream, demangle);
       break;

     case TYPE_CODE_BOOL:
       if (options->format || options->output_format)
 	{
 	  struct value_print_options opts = *options;
 	  opts.format = (options->format ? options->format
 			 : options->output_format);
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  &opts, 0, stream);
 	}
       else
 	{
 	  val = unpack_long (type, valaddr + embedded_offset);
 	  if (val == 0)
 	    fputs_filtered ("false", stream);
 	  else if (val == 1)
 	    fputs_filtered ("true", stream);
 	  else
 	    print_longest (stream, 'd', 0, val);
 	}
       break;

     case TYPE_CODE_RANGE:
       /* FIXME: create_range_type does not set the unsigned bit in a
          range type (I think it probably should copy it from the target
          type), so we won't print values which are too large to
          fit in a signed integer correctly.  */
       /* FIXME: Doesn't handle ranges of enums correctly.  (Can't just
          print with the target type, though, because the size of our type
          and the target type might differ).  */
       /* FALLTHROUGH */

     case TYPE_CODE_INT:
       if (options->format || options->output_format)
 	{
 	  struct value_print_options opts = *options;
 	  opts.format = (options->format ? options->format
 			 : options->output_format);
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  &opts, 0, stream);
 	}
       else
 	{
 	  val_print_type_code_int (type, valaddr + embedded_offset, stream);
 	  /* C and C++ has no single byte int type, char is used instead.
 	     Since we don't know whether the value is really intended to
 	     be used as an integer or a character, print the character
 	     equivalent as well.  */
 	  if (textual_element_type (type, options->format))
 	    {
 	      fputs_filtered (" ", stream);
 	      LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr + embedded_offset),
 			     stream);
 	    }
 	}
       break;

     case TYPE_CODE_CHAR:
       if (options->format || options->output_format)
 	{
 	  struct value_print_options opts = *options;
 	  opts.format = (options->format ? options->format
 			 : options->output_format);
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  &opts, 0, stream);
 	}
       else
 	{
 	  val = unpack_long (type, valaddr + embedded_offset);
 	  if (TYPE_UNSIGNED (type))
 	    fprintf_filtered (stream, "%u", (unsigned int) val);
 	  else
 	    fprintf_filtered (stream, "%d", (int) val);
 	  fputs_filtered (" ", stream);
 	  LA_PRINT_CHAR ((unsigned char) val, stream);
 	}
       break;

     case TYPE_CODE_FLT:
       if (options->format)
 	{
 	  print_scalar_formatted (valaddr + embedded_offset, type,
 				  options, 0, stream);
 	}
       else
 	{
 	  print_floating (valaddr + embedded_offset, type, stream);
 	}
       break;

     case TYPE_CODE_DECFLOAT:
       if (options->format)
 	print_scalar_formatted (valaddr + embedded_offset, type,
 				options, 0, stream);
       else
 	print_decimal_floating (valaddr + embedded_offset, type, stream);
       break;

     case TYPE_CODE_VOID:
       fprintf_filtered (stream, "void");
       break;

     case TYPE_CODE_ERROR:
       fprintf_filtered (stream, _("<error type>"));
       break;

     case TYPE_CODE_UNDEF:
       /* This happens (without TYPE_FLAG_STUB set) on systems which don't use
          dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
          and no complete type for struct foo in that file.  */
       fprintf_filtered (stream, _("<incomplete type>"));
       break;

     case TYPE_CODE_COMPLEX:
       if (options->format)
 	print_scalar_formatted (valaddr + embedded_offset,
 				TYPE_TARGET_TYPE (type),
 				options, 0, stream);
       else
 	print_floating (valaddr + embedded_offset, TYPE_TARGET_TYPE (type),
 			stream);
       fprintf_filtered (stream, " + ");
       if (options->format)
 	print_scalar_formatted (valaddr + embedded_offset
 				+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
 				TYPE_TARGET_TYPE (type),
 				options, 0, stream);
       else
 	print_floating (valaddr + embedded_offset
 			+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
 			TYPE_TARGET_TYPE (type),
 			stream);
       fprintf_filtered (stream, " * I");
       break;

     default:
       error (_("Invalid C/C++ type code %d in symbol table."), TYPE_CODE (type));
     }
   gdb_flush (stream);
   return (0);
 }

 int
 c_value_print (struct value *val, struct ui_file *stream,
 	       const struct value_print_options *options)
 {
   struct type *type, *real_type;
   int full, top, using_enc;
   struct value_print_options opts = *options;

   opts.deref_ref = 1;

   /* If it is a pointer, indicate what it points to.

      Print type also if it is a reference.

      C++: if it is a member pointer, we will take care
      of that when we print it.  */

   type = check_typedef (value_type (val));

   if (TYPE_CODE (type) == TYPE_CODE_PTR
       || TYPE_CODE (type) == TYPE_CODE_REF)
     {
       /* Hack:  remove (char *) for char strings.  Their
          type is indicated by the quoted string anyway.
          (Don't use textual_element_type here; quoted strings
          are always exactly (char *).  */
       if (TYPE_CODE (type) == TYPE_CODE_PTR
 	  && TYPE_NAME (type) == NULL
 	  && TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL
 	  && strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0)
 	{
 	  /* Print nothing */
 	}
       else if (options->objectprint
 	       && (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
 	{

 	  if (TYPE_CODE(type) == TYPE_CODE_REF)
 	    {
 	      /* Copy value, change to pointer, so we don't get an
 	       * error about a non-pointer type in value_rtti_target_type
 	       */
 	      struct value *temparg;
 	      temparg=value_copy(val);
 	      deprecated_set_value_type (temparg, lookup_pointer_type (TYPE_TARGET_TYPE(type)));
 	      val=temparg;
 	    }
 	  /* Pointer to class, check real type of object */
 	  fprintf_filtered (stream, "(");
           real_type = value_rtti_target_type (val, &full, &top, &using_enc);
           if (real_type)
 	    {
 	      /* RTTI entry found */
               if (TYPE_CODE (type) == TYPE_CODE_PTR)
                 {
                   /* create a pointer type pointing to the real type */
                   type = lookup_pointer_type (real_type);
                 }
               else
                 {
                   /* create a reference type referencing the real type */
                   type = lookup_reference_type (real_type);
                 }
 	      /* JYG: Need to adjust pointer value. */
 	      /* NOTE: cagney/2005-01-02: THIS IS BOGUS.  */
               value_contents_writeable (val)[0] -= top;

               /* Note: When we look up RTTI entries, we don't get any
                  information on const or volatile attributes */
             }
           type_print (type, "", stream, -1);
 	  fprintf_filtered (stream, ") ");
 	}
       else
 	{
 	  /* normal case */
 	  fprintf_filtered (stream, "(");
 	  type_print (value_type (val), "", stream, -1);
 	  fprintf_filtered (stream, ") ");
 	}
     }

   if (!value_initialized (val))
     fprintf_filtered (stream, " [uninitialized] ");

   if (options->objectprint && (TYPE_CODE (type) == TYPE_CODE_CLASS))
     {
       /* Attempt to determine real type of object */
       real_type = value_rtti_type (val, &full, &top, &using_enc);
       if (real_type)
 	{
 	  /* We have RTTI information, so use it */
 	  val = value_full_object (val, real_type, full, top, using_enc);
 	  fprintf_filtered (stream, "(%s%s) ",
 			    TYPE_NAME (real_type),
 			    full ? "" : _(" [incomplete object]"));
 	  /* Print out object: enclosing type is same as real_type if full */
 	  return val_print (value_enclosing_type (val),
 			    value_contents_all (val), 0,
 			    VALUE_ADDRESS (val), stream, 0,
 			    &opts, current_language);
           /* Note: When we look up RTTI entries, we don't get any information on
              const or volatile attributes */
 	}
       else if (type != check_typedef (value_enclosing_type (val)))
 	{
 	  /* No RTTI information, so let's do our best */
 	  fprintf_filtered (stream, "(%s ?) ",
 			    TYPE_NAME (value_enclosing_type (val)));
 	  return val_print (value_enclosing_type (val),
 			    value_contents_all (val), 0,
 			    VALUE_ADDRESS (val), stream, 0,
 			    &opts, current_language);
 	}
       /* Otherwise, we end up at the return outside this "if" */
     }

   return val_print (type, value_contents_all (val),
 		    value_embedded_offset (val),
 		    VALUE_ADDRESS (val) + value_offset (val),
 		    stream, 0, &opts, current_language);
 }
	/* Support for printing C values for GDB, the GNU debugger.

	Copyright (C) 1986, 1988, 1989, 1991, 1992, 1993, 1994, 1995, 1996, 1997,
	1998, 1999, 2000, 2001, 2003, 2005, 2006, 2007, 2008
	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 "gdb_string.h"
	#include "symtab.h"
	#include "gdbtypes.h"
	#include "expression.h"
	#include "value.h"
	#include "valprint.h"
	#include "language.h"
	#include "c-lang.h"
	#include "cp-abi.h"
	#include "target.h"


	/* Print function pointer with inferior address ADDRESS onto stdio
	stream STREAM. */

	static void
	print_function_pointer_address (CORE_ADDR address, struct ui_file *stream,
	int addressprint)
	{
	CORE_ADDR func_addr = gdbarch_convert_from_func_ptr_addr (current_gdbarch,
	address,
	&current_target);

	/* If the function pointer is represented by a description, print the
	address of the description. */
	if (addressprint && func_addr != address)
	{
	fputs_filtered ("@", stream);
	fputs_filtered (paddress (address), stream);
	fputs_filtered (": ", stream);
	}
	print_address_demangle (func_addr, stream, demangle);
	}


	/* Apply a heuristic to decide whether an array of TYPE or a pointer
	to TYPE should be printed as a textual string. Return non-zero if
	it should, or zero if it should be treated as an array of integers
	or pointer to integers. FORMAT is the current format letter,
	or 0 if none.

	We guess that "char" is a character. Explicitly signed and
	unsigned character types are also characters. Integer data from
	vector types is not. The user can override this by using the /s
	format letter. */

	static int
	textual_element_type (struct type *type, char format)
	{
	struct type *true_type = check_typedef (type);

	if (format != 0 && format != 's')
	return 0;

	/* TYPE_CODE_CHAR is always textual. */
	if (TYPE_CODE (true_type) == TYPE_CODE_CHAR)
	return 1;

	if (format == 's')
	{
	/* Print this as a string if we can manage it. For now, no
	wide character support. */
	if (TYPE_CODE (true_type) == TYPE_CODE_INT
	&& TYPE_LENGTH (true_type) == 1)
	return 1;
	}
	else
	{
	/* If a one-byte TYPE_CODE_INT is missing the not-a-character
	flag, then we treat it as text; otherwise, we assume it's
	being used as data. */
	if (TYPE_CODE (true_type) == TYPE_CODE_INT
	&& TYPE_LENGTH (true_type) == 1
	&& !TYPE_NOTTEXT (true_type))
	return 1;
	}

	return 0;
	}


	/* Print data of type TYPE located at VALADDR (within GDB), which came from
	the inferior at address ADDRESS, onto stdio stream STREAM according to
	OPTIONS. The data at VALADDR is in target byte order.

	If the data are a string pointer, returns the number of string characters
	printed. */

	int
	c_val_print (struct type type, const gdb_byte valaddr, int embedded_offset,
	CORE_ADDR address, struct ui_file *stream, int recurse,
	const struct value_print_options *options)
	{
	unsigned int i = 0; /* Number of characters printed */
	unsigned len;
	struct type *elttype;
	unsigned eltlen;
	LONGEST val;
	CORE_ADDR addr;

	CHECK_TYPEDEF (type);
	switch (TYPE_CODE (type))
	{
	case TYPE_CODE_ARRAY:
	elttype = check_typedef (TYPE_TARGET_TYPE (type));
	if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (TYPE_TARGET_TYPE (type)) > 0)
	{
	eltlen = TYPE_LENGTH (elttype);
	len = TYPE_LENGTH (type) / eltlen;
	if (options->prettyprint_arrays)
	{
	print_spaces_filtered (2 + 2 * recurse, stream);
	}

	/* Print arrays of textual chars with a string syntax. */
	if (textual_element_type (elttype, options->format))
	{
	/* If requested, look for the first null char and only print
	elements up to it. */
	if (options->stop_print_at_null)
	{
	unsigned int temp_len;

	/* Look for a NULL char. */
	for (temp_len = 0;
	(valaddr + embedded_offset)[temp_len]
	&& temp_len < len && temp_len < options->print_max;
	temp_len++);
	len = temp_len;
	}

	LA_PRINT_STRING (stream, valaddr + embedded_offset, len, eltlen, 0, options);
	i = len;
	}
	else
	{
	fprintf_filtered (stream, "{");
	/* If this is a virtual function table, print the 0th
	entry specially, and the rest of the members normally. */
	if (cp_is_vtbl_ptr_type (elttype))
	{
	i = 1;
	fprintf_filtered (stream, _("%d vtable entries"), len - 1);
	}
	else
	{
	i = 0;
	}
	val_print_array_elements (type, valaddr + embedded_offset, address, stream,
	recurse, options, i);
	fprintf_filtered (stream, "}");
	}
	break;
	}
	/* Array of unspecified length: treat like pointer to first elt. */
	addr = address;
	goto print_unpacked_pointer;

	case TYPE_CODE_MEMBERPTR:
	if (options->format)
	{
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	break;
	}
	cp_print_class_member (valaddr + embedded_offset, type, stream, "&");
	break;

	case TYPE_CODE_METHODPTR:
	cplus_print_method_ptr (valaddr + embedded_offset, type, stream);
	break;

	case TYPE_CODE_PTR:
	if (options->format && options->format != 's')
	{
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	break;
	}
	if (options->vtblprint && cp_is_vtbl_ptr_type (type))
	{
	/* Print the unmangled name if desired. */
	/* Print vtable entry - we only get here if we ARE using
	-fvtable_thunks. (Otherwise, look under TYPE_CODE_STRUCT.) */
	CORE_ADDR addr
	= extract_typed_address (valaddr + embedded_offset, type);
	print_function_pointer_address (addr, stream, options->addressprint);
	break;
	}
	elttype = check_typedef (TYPE_TARGET_TYPE (type));
	{
	addr = unpack_pointer (type, valaddr + embedded_offset);
	print_unpacked_pointer:

	if (TYPE_CODE (elttype) == TYPE_CODE_FUNC)
	{
	/* Try to print what function it points to. */
	print_function_pointer_address (addr, stream,
	options->addressprint);
	/* Return value is irrelevant except for string pointers. */
	return (0);
	}

	if (options->addressprint)
	fputs_filtered (paddress (addr), stream);

	/* For a pointer to a textual type, also print the string
	pointed to, unless pointer is null. */
	/* FIXME: need to handle wchar_t here... */

	if (textual_element_type (elttype, options->format)
	&& addr != 0)
	{
	i = val_print_string (addr, -1, TYPE_LENGTH (elttype), stream,
	options);
	}
	else if (cp_is_vtbl_member (type))
	{
	/* print vtbl's nicely */
	CORE_ADDR vt_address = unpack_pointer (type, valaddr + embedded_offset);

	struct minimal_symbol *msymbol =
	lookup_minimal_symbol_by_pc (vt_address);
	if ((msymbol != NULL) &&
	(vt_address == SYMBOL_VALUE_ADDRESS (msymbol)))
	{
	fputs_filtered (" <", stream);
	fputs_filtered (SYMBOL_PRINT_NAME (msymbol), stream);
	fputs_filtered (">", stream);
	}
	if (vt_address && options->vtblprint)
	{
	struct value *vt_val;
	struct symbol wsym = (struct symbol ) NULL;
	struct type *wtype;
	struct block block = (struct block ) NULL;
	int is_this_fld;

	if (msymbol != NULL)
	wsym = lookup_symbol (SYMBOL_LINKAGE_NAME (msymbol), block,
	VAR_DOMAIN, &is_this_fld);

	if (wsym)
	{
	wtype = SYMBOL_TYPE (wsym);
	}
	else
	{
	wtype = TYPE_TARGET_TYPE (type);
	}
	vt_val = value_at (wtype, vt_address);
	common_val_print (vt_val, stream, recurse + 1, options,
	current_language);
	if (options->pretty)
	{
	fprintf_filtered (stream, "\n");
	print_spaces_filtered (2 + 2 * recurse, stream);
	}
	}
	}

	/* Return number of characters printed, including the terminating
	'\0' if we reached the end. val_print_string takes care including
	the terminating '\0' if necessary. */
	return i;
	}
	break;

	case TYPE_CODE_REF:
	elttype = check_typedef (TYPE_TARGET_TYPE (type));
	if (options->addressprint)
	{
	CORE_ADDR addr
	= extract_typed_address (valaddr + embedded_offset, type);
	fprintf_filtered (stream, "@");
	fputs_filtered (paddress (addr), stream);
	if (options->deref_ref)
	fputs_filtered (": ", stream);
	}
	/* De-reference the reference. */
	if (options->deref_ref)
	{
	if (TYPE_CODE (elttype) != TYPE_CODE_UNDEF)
	{
	struct value *deref_val =
	value_at
	(TYPE_TARGET_TYPE (type),
	unpack_pointer (type, valaddr + embedded_offset));
	common_val_print (deref_val, stream, recurse, options,
	current_language);
	}
	else
	fputs_filtered ("???", stream);
	}
	break;

	case TYPE_CODE_UNION:
	if (recurse && !options->unionprint)
	{
	fprintf_filtered (stream, "{...}");
	break;
	}
	/* Fall through. */
	case TYPE_CODE_STRUCT:
	/FIXME: Abstract this away /
	if (options->vtblprint && cp_is_vtbl_ptr_type (type))
	{
	/* Print the unmangled name if desired. */
	/* Print vtable entry - we only get here if NOT using
	-fvtable_thunks. (Otherwise, look under TYPE_CODE_PTR.) */
	int offset = (embedded_offset +
	TYPE_FIELD_BITPOS (type, VTBL_FNADDR_OFFSET) / 8);
	struct type *field_type = TYPE_FIELD_TYPE (type, VTBL_FNADDR_OFFSET);
	CORE_ADDR addr
	= extract_typed_address (valaddr + offset, field_type);

	print_function_pointer_address (addr, stream, options->addressprint);
	}
	else
	cp_print_value_fields (type, type, valaddr, embedded_offset, address, stream,
	recurse, options, NULL, 0);
	break;

	case TYPE_CODE_ENUM:
	if (options->format)
	{
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	break;
	}
	len = TYPE_NFIELDS (type);
	val = unpack_long (type, valaddr + embedded_offset);
	for (i = 0; i < len; i++)
	{
	QUIT;
	if (val == TYPE_FIELD_BITPOS (type, i))
	{
	break;
	}
	}
	if (i < len)
	{
	fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
	}
	else
	{
	print_longest (stream, 'd', 0, val);
	}
	break;

	case TYPE_CODE_FLAGS:
	if (options->format)
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	else
	val_print_type_code_flags (type, valaddr + embedded_offset, stream);
	break;

	case TYPE_CODE_FUNC:
	case TYPE_CODE_METHOD:
	if (options->format)
	{
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	break;
	}
	/* FIXME, we should consider, at least for ANSI C language, eliminating
	the distinction made between FUNCs and POINTERs to FUNCs. */
	fprintf_filtered (stream, "{");
	type_print (type, "", stream, -1);
	fprintf_filtered (stream, "} ");
	/* Try to print what function it points to, and its address. */
	print_address_demangle (address, stream, demangle);
	break;

	case TYPE_CODE_BOOL:
	if (options->format \|\| options->output_format)
	{
	struct value_print_options opts = *options;
	opts.format = (options->format ? options->format
	: options->output_format);
	print_scalar_formatted (valaddr + embedded_offset, type,
	&opts, 0, stream);
	}
	else
	{
	val = unpack_long (type, valaddr + embedded_offset);
	if (val == 0)
	fputs_filtered ("false", stream);
	else if (val == 1)
	fputs_filtered ("true", stream);
	else
	print_longest (stream, 'd', 0, val);
	}
	break;

	case TYPE_CODE_RANGE:
	/* FIXME: create_range_type does not set the unsigned bit in a
	range type (I think it probably should copy it from the target
	type), so we won't print values which are too large to
	fit in a signed integer correctly. */
	/* FIXME: Doesn't handle ranges of enums correctly. (Can't just
	print with the target type, though, because the size of our type
	and the target type might differ). */
	/* FALLTHROUGH */

	case TYPE_CODE_INT:
	if (options->format \|\| options->output_format)
	{
	struct value_print_options opts = *options;
	opts.format = (options->format ? options->format
	: options->output_format);
	print_scalar_formatted (valaddr + embedded_offset, type,
	&opts, 0, stream);
	}
	else
	{
	val_print_type_code_int (type, valaddr + embedded_offset, stream);
	/* C and C++ has no single byte int type, char is used instead.
	Since we don't know whether the value is really intended to
	be used as an integer or a character, print the character
	equivalent as well. */
	if (textual_element_type (type, options->format))
	{
	fputs_filtered (" ", stream);
	LA_PRINT_CHAR ((unsigned char) unpack_long (type, valaddr + embedded_offset),
	stream);
	}
	}
	break;

	case TYPE_CODE_CHAR:
	if (options->format \|\| options->output_format)
	{
	struct value_print_options opts = *options;
	opts.format = (options->format ? options->format
	: options->output_format);
	print_scalar_formatted (valaddr + embedded_offset, type,
	&opts, 0, stream);
	}
	else
	{
	val = unpack_long (type, valaddr + embedded_offset);
	if (TYPE_UNSIGNED (type))
	fprintf_filtered (stream, "%u", (unsigned int) val);
	else
	fprintf_filtered (stream, "%d", (int) val);
	fputs_filtered (" ", stream);
	LA_PRINT_CHAR ((unsigned char) val, stream);
	}
	break;

	case TYPE_CODE_FLT:
	if (options->format)
	{
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	}
	else
	{
	print_floating (valaddr + embedded_offset, type, stream);
	}
	break;

	case TYPE_CODE_DECFLOAT:
	if (options->format)
	print_scalar_formatted (valaddr + embedded_offset, type,
	options, 0, stream);
	else
	print_decimal_floating (valaddr + embedded_offset, type, stream);
	break;

	case TYPE_CODE_VOID:
	fprintf_filtered (stream, "void");
	break;

	case TYPE_CODE_ERROR:
	fprintf_filtered (stream, _("<error type>"));
	break;

	case TYPE_CODE_UNDEF:
	/* This happens (without TYPE_FLAG_STUB set) on systems which don't use
	dbx xrefs (NO_DBX_XREFS in gcc) if a file has a "struct foo *bar"
	and no complete type for struct foo in that file. */
	fprintf_filtered (stream, _("<incomplete type>"));
	break;

	case TYPE_CODE_COMPLEX:
	if (options->format)
	print_scalar_formatted (valaddr + embedded_offset,
	TYPE_TARGET_TYPE (type),
	options, 0, stream);
	else
	print_floating (valaddr + embedded_offset, TYPE_TARGET_TYPE (type),
	stream);
	fprintf_filtered (stream, " + ");
	if (options->format)
	print_scalar_formatted (valaddr + embedded_offset
	+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
	TYPE_TARGET_TYPE (type),
	options, 0, stream);
	else
	print_floating (valaddr + embedded_offset
	+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
	TYPE_TARGET_TYPE (type),
	stream);
	fprintf_filtered (stream, " * I");
	break;

	default:
	error (_("Invalid C/C++ type code %d in symbol table."), TYPE_CODE (type));
	}
	gdb_flush (stream);
	return (0);
	}

	int
	c_value_print (struct value val, struct ui_file stream,
	const struct value_print_options *options)
	{
	struct type type, real_type;
	int full, top, using_enc;
	struct value_print_options opts = *options;

	opts.deref_ref = 1;

	/* If it is a pointer, indicate what it points to.

	Print type also if it is a reference.

	C++: if it is a member pointer, we will take care
	of that when we print it. */

	type = check_typedef (value_type (val));

	if (TYPE_CODE (type) == TYPE_CODE_PTR
	\|\| TYPE_CODE (type) == TYPE_CODE_REF)
	{
	/* Hack: remove (char *) for char strings. Their
	type is indicated by the quoted string anyway.
	(Don't use textual_element_type here; quoted strings
	are always exactly (char ). /
	if (TYPE_CODE (type) == TYPE_CODE_PTR
	&& TYPE_NAME (type) == NULL
	&& TYPE_NAME (TYPE_TARGET_TYPE (type)) != NULL
	&& strcmp (TYPE_NAME (TYPE_TARGET_TYPE (type)), "char") == 0)
	{
	/* Print nothing */
	}
	else if (options->objectprint
	&& (TYPE_CODE (TYPE_TARGET_TYPE (type)) == TYPE_CODE_CLASS))
	{

	if (TYPE_CODE(type) == TYPE_CODE_REF)
	{
	/* Copy value, change to pointer, so we don't get an
	* error about a non-pointer type in value_rtti_target_type
	*/
	struct value *temparg;
	temparg=value_copy(val);
	deprecated_set_value_type (temparg, lookup_pointer_type (TYPE_TARGET_TYPE(type)));
	val=temparg;
	}
	/* Pointer to class, check real type of object */
	fprintf_filtered (stream, "(");
	real_type = value_rtti_target_type (val, &full, &top, &using_enc);
	if (real_type)
	{
	/* RTTI entry found */
	if (TYPE_CODE (type) == TYPE_CODE_PTR)
	{
	/* create a pointer type pointing to the real type */
	type = lookup_pointer_type (real_type);
	}
	else
	{
	/* create a reference type referencing the real type */
	type = lookup_reference_type (real_type);
	}
	/* JYG: Need to adjust pointer value. */
	/* NOTE: cagney/2005-01-02: THIS IS BOGUS. */
	value_contents_writeable (val)[0] -= top;

	/* Note: When we look up RTTI entries, we don't get any
	information on const or volatile attributes */
	}
	type_print (type, "", stream, -1);
	fprintf_filtered (stream, ") ");
	}
	else
	{
	/* normal case */
	fprintf_filtered (stream, "(");
	type_print (value_type (val), "", stream, -1);
	fprintf_filtered (stream, ") ");
	}
	}

	if (!value_initialized (val))
	fprintf_filtered (stream, " [uninitialized] ");

	if (options->objectprint && (TYPE_CODE (type) == TYPE_CODE_CLASS))
	{
	/* Attempt to determine real type of object */
	real_type = value_rtti_type (val, &full, &top, &using_enc);
	if (real_type)
	{
	/* We have RTTI information, so use it */
	val = value_full_object (val, real_type, full, top, using_enc);
	fprintf_filtered (stream, "(%s%s) ",
	TYPE_NAME (real_type),
	full ? "" : _(" [incomplete object]"));
	/* Print out object: enclosing type is same as real_type if full */
	return val_print (value_enclosing_type (val),
	value_contents_all (val), 0,
	VALUE_ADDRESS (val), stream, 0,
	&opts, current_language);
	/* Note: When we look up RTTI entries, we don't get any information on
	const or volatile attributes */
	}
	else if (type != check_typedef (value_enclosing_type (val)))
	{
	/* No RTTI information, so let's do our best */
	fprintf_filtered (stream, "(%s ?) ",
	TYPE_NAME (value_enclosing_type (val)));
	return val_print (value_enclosing_type (val),
	value_contents_all (val), 0,
	VALUE_ADDRESS (val), stream, 0,
	&opts, current_language);
	}
	/* Otherwise, we end up at the return outside this "if" */
	}

	return val_print (type, value_contents_all (val),
	value_embedded_offset (val),
	VALUE_ADDRESS (val) + value_offset (val),
	stream, 0, &opts, current_language);
	}