riscv-gnu-toolchain/gdb.git - Unnamed repository; edit this file 'description' to name the repository.

/* Print values for GDB, the GNU debugger.

   Copyright (C) 1986-2014 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 <string.h>
#include "symtab.h"
#include "gdbtypes.h"
#include "value.h"
#include "gdbcore.h"
#include "gdbcmd.h"
#include "target.h"
#include "language.h"
#include "annotate.h"
#include "valprint.h"
#include "floatformat.h"
#include "doublest.h"
#include "exceptions.h"
#include "dfp.h"
#include "extension.h"
#include "ada-lang.h"
#include "gdb_obstack.h"
#include "charset.h"
#include <ctype.h>

#include <errno.h>

/* Maximum number of wchars returned from wchar_iterate.  */
#define MAX_WCHARS 4

/* A convenience macro to compute the size of a wchar_t buffer containing X
   characters.  */
#define WCHAR_BUFLEN(X) ((X) * sizeof (gdb_wchar_t))

/* Character buffer size saved while iterating over wchars.  */
#define WCHAR_BUFLEN_MAX WCHAR_BUFLEN (MAX_WCHARS)

/* A structure to encapsulate state information from iterated
   character conversions.  */
struct converted_character
{
  /* The number of characters converted.  */
  int num_chars;

  /* The result of the conversion.  See charset.h for more.  */
  enum wchar_iterate_result result;

  /* The (saved) converted character(s).  */
  gdb_wchar_t chars[WCHAR_BUFLEN_MAX];

  /* The first converted target byte.  */
  const gdb_byte *buf;

  /* The number of bytes converted.  */
  size_t buflen;

  /* How many times this character(s) is repeated.  */
  int repeat_count;
};

typedef struct converted_character converted_character_d;
DEF_VEC_O (converted_character_d);

/* Command lists for set/show print raw.  */
struct cmd_list_element *setprintrawlist;
struct cmd_list_element *showprintrawlist;

/* Prototypes for local functions */

static int partial_memory_read (CORE_ADDR memaddr, gdb_byte *myaddr,
				int len, int *errptr);

static void show_print (char *, int);

static void set_print (char *, int);

static void set_radix (char *, int);

static void show_radix (char *, int);

static void set_input_radix (char *, int, struct cmd_list_element *);

static void set_input_radix_1 (int, unsigned);

static void set_output_radix (char *, int, struct cmd_list_element *);

static void set_output_radix_1 (int, unsigned);

void _initialize_valprint (void);

#define PRINT_MAX_DEFAULT 200	/* Start print_max off at this value.  */

struct value_print_options user_print_options =
{
  Val_prettyformat_default,	/* prettyformat */
  0,				/* prettyformat_arrays */
  0,				/* prettyformat_structs */
  0,				/* vtblprint */
  1,				/* unionprint */
  1,				/* addressprint */
  0,				/* objectprint */
  PRINT_MAX_DEFAULT,		/* print_max */
  10,				/* repeat_count_threshold */
  0,				/* output_format */
  0,				/* format */
  0,				/* stop_print_at_null */
  0,				/* print_array_indexes */
  0,				/* deref_ref */
  1,				/* static_field_print */
  1,				/* pascal_static_field_print */
  0,				/* raw */
  0,				/* summary */
  1				/* symbol_print */
};

/* Initialize *OPTS to be a copy of the user print options.  */
void
get_user_print_options (struct value_print_options *opts)
{
  *opts = user_print_options;
}

/* Initialize *OPTS to be a copy of the user print options, but with
   pretty-formatting disabled.  */
void
get_no_prettyformat_print_options (struct value_print_options *opts)
{  
  *opts = user_print_options;
  opts->prettyformat = Val_no_prettyformat;
}

/* Initialize *OPTS to be a copy of the user print options, but using
   FORMAT as the formatting option.  */
void
get_formatted_print_options (struct value_print_options *opts,
			     char format)
{
  *opts = user_print_options;
  opts->format = format;
}

static void
show_print_max (struct ui_file *file, int from_tty,
		struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Limit on string chars or array "
		      "elements to print is %s.\n"),
		    value);
}


/* Default input and output radixes, and output format letter.  */

unsigned input_radix = 10;
static void
show_input_radix (struct ui_file *file, int from_tty,
		  struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Default input radix for entering numbers is %s.\n"),
		    value);
}

unsigned output_radix = 10;
static void
show_output_radix (struct ui_file *file, int from_tty,
		   struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Default output radix for printing of values is %s.\n"),
		    value);
}

/* By default we print arrays without printing the index of each element in
   the array.  This behavior can be changed by setting PRINT_ARRAY_INDEXES.  */

static void
show_print_array_indexes (struct ui_file *file, int from_tty,
		          struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Printing of array indexes is %s.\n"), value);
}

/* Print repeat counts if there are more than this many repetitions of an
   element in an array.  Referenced by the low level language dependent
   print routines.  */

static void
show_repeat_count_threshold (struct ui_file *file, int from_tty,
			     struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Threshold for repeated print elements is %s.\n"),
		    value);
}

/* If nonzero, stops printing of char arrays at first null.  */

static void
show_stop_print_at_null (struct ui_file *file, int from_tty,
			 struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Printing of char arrays to stop "
		      "at first null char is %s.\n"),
		    value);
}

/* Controls pretty printing of structures.  */

static void
show_prettyformat_structs (struct ui_file *file, int from_tty,
			  struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Pretty formatting of structures is %s.\n"), value);
}

/* Controls pretty printing of arrays.  */

static void
show_prettyformat_arrays (struct ui_file *file, int from_tty,
			 struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Pretty formatting of arrays is %s.\n"), value);
}

/* If nonzero, causes unions inside structures or other unions to be
   printed.  */

static void
show_unionprint (struct ui_file *file, int from_tty,
		 struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Printing of unions interior to structures is %s.\n"),
		    value);
}

/* If nonzero, causes machine addresses to be printed in certain contexts.  */

static void
show_addressprint (struct ui_file *file, int from_tty,
		   struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file, _("Printing of addresses is %s.\n"), value);
}

static void
show_symbol_print (struct ui_file *file, int from_tty,
		   struct cmd_list_element *c, const char *value)
{
  fprintf_filtered (file,
		    _("Printing of symbols when printing pointers is %s.\n"),
		    value);
}


/* A helper function for val_print.  When printing in "summary" mode,
   we want to print scalar arguments, but not aggregate arguments.
   This function distinguishes between the two.  */

int
val_print_scalar_type_p (struct type *type)
{
  CHECK_TYPEDEF (type);
  while (TYPE_CODE (type) == TYPE_CODE_REF)
    {
      type = TYPE_TARGET_TYPE (type);
      CHECK_TYPEDEF (type);
    }
  switch (TYPE_CODE (type))
    {
    case TYPE_CODE_ARRAY:
    case TYPE_CODE_STRUCT:
    case TYPE_CODE_UNION:
    case TYPE_CODE_SET:
    case TYPE_CODE_STRING:
      return 0;
    default:
      return 1;
    }
}

/* See its definition in value.h.  */

int
valprint_check_validity (struct ui_file *stream,
			 struct type *type,
			 int embedded_offset,
			 const struct value *val)
{
  CHECK_TYPEDEF (type);

  if (TYPE_CODE (type) != TYPE_CODE_UNION
      && TYPE_CODE (type) != TYPE_CODE_STRUCT
      && TYPE_CODE (type) != TYPE_CODE_ARRAY)
    {
      if (!value_bits_valid (val, TARGET_CHAR_BIT * embedded_offset,
			     TARGET_CHAR_BIT * TYPE_LENGTH (type)))
	{
	  val_print_optimized_out (val, stream);
	  return 0;
	}

      if (value_bits_synthetic_pointer (val, TARGET_CHAR_BIT * embedded_offset,
					TARGET_CHAR_BIT * TYPE_LENGTH (type)))
	{
	  fputs_filtered (_("<synthetic pointer>"), stream);
	  return 0;
	}

      if (!value_bytes_available (val, embedded_offset, TYPE_LENGTH (type)))
	{
	  val_print_unavailable (stream);
	  return 0;
	}
    }

  return 1;
}

void
val_print_optimized_out (const struct value *val, struct ui_file *stream)
{
  if (val != NULL && value_lval_const (val) == lval_register)
    val_print_not_saved (stream);
  else
    fprintf_filtered (stream, _("<optimized out>"));
}

void
val_print_not_saved (struct ui_file *stream)
{
  fprintf_filtered (stream, _("<not saved>"));
}

void
val_print_unavailable (struct ui_file *stream)
{
  fprintf_filtered (stream, _("<unavailable>"));
}

void
val_print_invalid_address (struct ui_file *stream)
{
  fprintf_filtered (stream, _("<invalid address>"));
}

/* A generic val_print that is suitable for use by language
   implementations of the la_val_print method.  This function can
   handle most type codes, though not all, notably exception
   TYPE_CODE_UNION and TYPE_CODE_STRUCT, which must be implemented by
   the caller.
   
   Most arguments are as to val_print.
   
   The additional DECORATIONS argument can be used to customize the
   output in some small, language-specific ways.  */

void
generic_val_print (struct type *type, const gdb_byte *valaddr,
		   int embedded_offset, CORE_ADDR address,
		   struct ui_file *stream, int recurse,
		   const struct value *original_value,
		   const struct value_print_options *options,
		   const struct generic_val_print_decorations *decorations)
{
  struct gdbarch *gdbarch = get_type_arch (type);
  unsigned int i = 0;	/* Number of characters printed.  */
  unsigned len;
  struct type *elttype, *unresolved_elttype;
  struct type *unresolved_type = type;
  LONGEST val;
  CORE_ADDR addr;

  CHECK_TYPEDEF (type);
  switch (TYPE_CODE (type))
    {
    case TYPE_CODE_ARRAY:
      unresolved_elttype = TYPE_TARGET_TYPE (type);
      elttype = check_typedef (unresolved_elttype);
      if (TYPE_LENGTH (type) > 0 && TYPE_LENGTH (unresolved_elttype) > 0)
	{
          LONGEST low_bound, high_bound;

          if (!get_array_bounds (type, &low_bound, &high_bound))
            error (_("Could not determine the array high bound"));

	  if (options->prettyformat_arrays)
	    {
	      print_spaces_filtered (2 + 2 * recurse, stream);
	    }

	  fprintf_filtered (stream, "{");
	  val_print_array_elements (type, valaddr, embedded_offset,
				    address, stream,
				    recurse, original_value, options, 0);
	  fprintf_filtered (stream, "}");
	  break;
	}
      /* Array of unspecified length: treat like pointer to first
	 elt.  */
      addr = address + embedded_offset;
      goto print_unpacked_pointer;

    case TYPE_CODE_MEMBERPTR:
      val_print_scalar_formatted (type, valaddr, embedded_offset,
				  original_value, options, 0, stream);
      break;

    case TYPE_CODE_PTR:
      if (options->format && options->format != 's')
	{
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, options, 0, stream);
	  break;
	}
      unresolved_elttype = TYPE_TARGET_TYPE (type);
      elttype = check_typedef (unresolved_elttype);
	{
	  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 (options, gdbarch, addr, stream);
	      return;
	    }

	  if (options->symbol_print)
	    print_address_demangle (options, gdbarch, addr, stream, demangle);
	  else if (options->addressprint)
	    fputs_filtered (paddress (gdbarch, addr), stream);
	}
      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 (gdbarch, 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;

	      deref_val = coerce_ref_if_computed (original_value);
	      if (deref_val != NULL)
		{
		  /* More complicated computed references are not supported.  */
		  gdb_assert (embedded_offset == 0);
		}
	      else
		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_ENUM:
      if (options->format)
	{
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, 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_ENUMVAL (type, i))
	    {
	      break;
	    }
	}
      if (i < len)
	{
	  fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
	}
      else if (TYPE_FLAG_ENUM (type))
	{
	  int first = 1;

	  /* We have a "flag" enum, so we try to decompose it into
	     pieces as appropriate.  A flag enum has disjoint
	     constants by definition.  */
	  fputs_filtered ("(", stream);
	  for (i = 0; i < len; ++i)
	    {
	      QUIT;

	      if ((val & TYPE_FIELD_ENUMVAL (type, i)) != 0)
		{
		  if (!first)
		    fputs_filtered (" | ", stream);
		  first = 0;

		  val &= ~TYPE_FIELD_ENUMVAL (type, i);
		  fputs_filtered (TYPE_FIELD_NAME (type, i), stream);
		}
	    }

	  if (first || val != 0)
	    {
	      if (!first)
		fputs_filtered (" | ", stream);
	      fputs_filtered ("unknown: ", stream);
	      print_longest (stream, 'd', 0, val);
	    }

	  fputs_filtered (")", stream);
	}
      else
	print_longest (stream, 'd', 0, val);
      break;

    case TYPE_CODE_FLAGS:
      if (options->format)
	val_print_scalar_formatted (type, valaddr, embedded_offset,
				    original_value, 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)
	{
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, 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 (options, gdbarch, 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);
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, &opts, 0, stream);
	}
      else
	{
	  val = unpack_long (type, valaddr + embedded_offset);
	  if (val == 0)
	    fputs_filtered (decorations->false_name, stream);
	  else if (val == 1)
	    fputs_filtered (decorations->true_name, 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);
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, &opts, 0, stream);
	}
      else
	val_print_type_code_int (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);
	  val_print_scalar_formatted (type, valaddr, embedded_offset,
				      original_value, &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 (val, unresolved_type, stream);
	}
      break;

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

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

    case TYPE_CODE_VOID:
      fputs_filtered (decorations->void_name, stream);
      break;

    case TYPE_CODE_ERROR:
      fprintf_filtered (stream, "%s", TYPE_ERROR_NAME (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:
      fprintf_filtered (stream, "%s", decorations->complex_prefix);
      if (options->format)
	val_print_scalar_formatted (TYPE_TARGET_TYPE (type),
				    valaddr, embedded_offset,
				    original_value, options, 0, stream);
      else
	print_floating (valaddr + embedded_offset,
			TYPE_TARGET_TYPE (type),
			stream);
      fprintf_filtered (stream, "%s", decorations->complex_infix);
      if (options->format)
	val_print_scalar_formatted (TYPE_TARGET_TYPE (type),
				    valaddr,
				    embedded_offset
				    + TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
				    original_value,
				    options, 0, stream);
      else
	print_floating (valaddr + embedded_offset
			+ TYPE_LENGTH (TYPE_TARGET_TYPE (type)),
			TYPE_TARGET_TYPE (type),
			stream);
      fprintf_filtered (stream, "%s", decorations->complex_suffix);
      break;

    case TYPE_CODE_UNION:
    case TYPE_CODE_STRUCT:
    case TYPE_CODE_METHODPTR:
    default:
      error (_("Unhandled type code %d in symbol table."),
	     TYPE_CODE (type));
    }
  gdb_flush (stream);
}

/* Print using the given LANGUAGE the data of type TYPE located at
   VALADDR + EMBEDDED_OFFSET (within GDB), which came from the
   inferior at address ADDRESS + EMBEDDED_OFFSET, onto stdio stream
   STREAM according to OPTIONS.  VAL is the whole object that came
   from ADDRESS.  VALADDR must point to the head of VAL's contents
   buffer.

   The language printers will pass down an adjusted EMBEDDED_OFFSET to
   further helper subroutines as subfields of TYPE are printed.  In
   such cases, VALADDR is passed down unadjusted, as well as VAL, so
   that VAL can be queried for metadata about the contents data being
   printed, using EMBEDDED_OFFSET as an offset into VAL's contents
   buffer.  For example: "has this field been optimized out", or "I'm
   printing an object while inspecting a traceframe; has this
   particular piece of data been collected?".

   RECURSE indicates the amount of indentation to supply before
   continuation lines; this amount is roughly twice the value of
   RECURSE.  */

void
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,
	   const struct language_defn *language)
{
  volatile struct gdb_exception except;
  int ret = 0;
  struct value_print_options local_opts = *options;
  struct type *real_type = check_typedef (type);

  if (local_opts.prettyformat == Val_prettyformat_default)
    local_opts.prettyformat = (local_opts.prettyformat_structs
			       ? Val_prettyformat : Val_no_prettyformat);

  QUIT;

  /* Ensure that the type is complete and not just a stub.  If the type is
     only a stub and we can't find and substitute its complete type, then
     print appropriate string and return.  */

  if (TYPE_STUB (real_type))
    {
      fprintf_filtered (stream, _("<incomplete type>"));
      gdb_flush (stream);
      return;
    }

  if (!valprint_check_validity (stream, real_type, embedded_offset, val))
    return;

  if (!options->raw)
    {
      ret = apply_ext_lang_val_pretty_printer (type, valaddr, embedded_offset,
					       address, stream, recurse,
					       val, options, language);
      if (ret)
	return;
    }

  /* Handle summary mode.  If the value is a scalar, print it;
     otherwise, print an ellipsis.  */
  if (options->summary && !val_print_scalar_type_p (type))
    {
      fprintf_filtered (stream, "...");
      return;
    }

  TRY_CATCH (except, RETURN_MASK_ERROR)
    {
      language->la_val_print (type, valaddr, embedded_offset, address,
			      stream, recurse, val,
			      &local_opts);
    }
  if (except.reason < 0)
    fprintf_filtered (stream, _("<error reading variable>"));
}

/* Check whether the value VAL is printable.  Return 1 if it is;
   return 0 and print an appropriate error message to STREAM according to
   OPTIONS if it is not.  */

static int
value_check_printable (struct value *val, struct ui_file *stream,
		       const struct value_print_options *options)
{
  if (val == 0)
    {
      fprintf_filtered (stream, _("<address of value unknown>"));
      return 0;
    }

  if (value_entirely_optimized_out (val))
    {
      if (options->summary && !val_print_scalar_type_p (value_type (val)))
	fprintf_filtered (stream, "...");
      else
	val_print_optimized_out (val, stream);
      return 0;
    }

  if (value_entirely_unavailable (val))
    {
      if (options->summary && !val_print_scalar_type_p (value_type (val)))
	fprintf_filtered (stream, "...");
      else
	val_print_unavailable (stream);
      return 0;
    }

  if (TYPE_CODE (value_type (val)) == TYPE_CODE_INTERNAL_FUNCTION)
    {
      fprintf_filtered (stream, _("<internal function %s>"),
			value_internal_function_name (val));
      return 0;
    }

  return 1;
}

/* Print using the given LANGUAGE the value VAL onto stream STREAM according
   to OPTIONS.

   This is a preferable interface to val_print, above, because it uses
   GDB's value mechanism.  */

void
common_val_print (struct value *val, struct ui_file *stream, int recurse,
		  const struct value_print_options *options,
		  const struct language_defn *language)
{
  if (!value_check_printable (val, stream, options))
    return;

  if (language->la_language == language_ada)
    /* The value might have a dynamic type, which would cause trouble
       below when trying to extract the value contents (since the value
       size is determined from the type size which is unknown).  So
       get a fixed representation of our value.  */
    val = ada_to_fixed_value (val);

  val_print (value_type (val), value_contents_for_printing (val),
	     value_embedded_offset (val), value_address (val),
	     stream, recurse,
	     val, options, language);
}

/* Print on stream STREAM the value VAL according to OPTIONS.  The value
   is printed using the current_language syntax.  */

void
value_print (struct value *val, struct ui_file *stream,
	     const struct value_print_options *options)
{
  if (!value_check_printable (val, stream, options))
    return;

  if (!options->raw)
    {
      int r
	= apply_ext_lang_val_pretty_printer (value_type (val),
					     value_contents_for_printing (val),
					     value_embedded_offset (val),
					     value_address (val),
					     stream, 0,
					     val, options, current_language);

      if (r)
	return;
    }

  LA_VALUE_PRINT (val, stream, options);
}

/* Called by various <lang>_val_print routines to print
   TYPE_CODE_INT's.  TYPE is the type.  VALADDR is the address of the
   value.  STREAM is where to print the value.  */

void
val_print_type_code_int (struct type *type, const gdb_byte *valaddr,
			 struct ui_file *stream)
{
  enum bfd_endian byte_order = gdbarch_byte_order (get_type_arch (type));

  if (TYPE_LENGTH (type) > sizeof (LONGEST))
    {
      LONGEST val;

      if (TYPE_UNSIGNED (type)
	  && extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type),
					    byte_order, &val))
	{
	  print_longest (stream, 'u', 0, val);
	}
      else
	{
	  /* Signed, or we couldn't turn an unsigned value into a
	     LONGEST.  For signed values, one could assume two's
	     complement (a reasonable assumption, I think) and do
	     better than this.  */
	  print_hex_chars (stream, (unsigned char *) valaddr,
			   TYPE_LENGTH (type), byte_order);
	}
    }
  else
    {
      print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0,
		     unpack_long (type, valaddr));
    }
}

void
val_print_type_code_flags (struct type *type, const gdb_byte *valaddr,
			   struct ui_file *stream)
{
  ULONGEST val = unpack_long (type, valaddr);
  int bitpos, nfields = TYPE_NFIELDS (type);

  fputs_filtered ("[ ", stream);
  for (bitpos = 0; bitpos < nfields; bitpos++)
    {
      if (TYPE_FIELD_BITPOS (type, bitpos) != -1
	  && (val & ((ULONGEST)1 << bitpos)))
	{
	  if (TYPE_FIELD_NAME (type, bitpos))
	    fprintf_filtered (stream, "%s ", TYPE_FIELD_NAME (type, bitpos));
	  else
	    fprintf_filtered (stream, "#%d ", bitpos);
	}
    }
  fputs_filtered ("]", stream);
}

/* Print a scalar of data of type TYPE, pointed to in GDB by VALADDR,
   according to OPTIONS and SIZE on STREAM.  Format i is not supported
   at this level.

   This is how the elements of an array or structure are printed
   with a format.  */

void
val_print_scalar_formatted (struct type *type,
			    const gdb_byte *valaddr, int embedded_offset,
			    const struct value *val,
			    const struct value_print_options *options,
			    int size,
			    struct ui_file *stream)
{
  gdb_assert (val != NULL);
  gdb_assert (valaddr == value_contents_for_printing_const (val));

  /* If we get here with a string format, try again without it.  Go
     all the way back to the language printers, which may call us
     again.  */
  if (options->format == 's')
    {
      struct value_print_options opts = *options;
      opts.format = 0;
      opts.deref_ref = 0;
      val_print (type, valaddr, embedded_offset, 0, stream, 0, val, &opts,
		 current_language);
      return;
    }

  /* A scalar object that does not have all bits available can't be
     printed, because all bits contribute to its representation.  */
  if (!value_bits_valid (val, TARGET_CHAR_BIT * embedded_offset,
			      TARGET_CHAR_BIT * TYPE_LENGTH (type)))
    val_print_optimized_out (val, stream);
  else if (!value_bytes_available (val, embedded_offset, TYPE_LENGTH (type)))
    val_print_unavailable (stream);
  else
    print_scalar_formatted (valaddr + embedded_offset, type,
			    options, size, stream);
}

/* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
   The raison d'etre of this function is to consolidate printing of 
   LONG_LONG's into this one function.  The format chars b,h,w,g are 
   from print_scalar_formatted().  Numbers are printed using C
   format.

   USE_C_FORMAT means to use C format in all cases.  Without it, 
   'o' and 'x' format do not include the standard C radix prefix
   (leading 0 or 0x). 
   
   Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
   and was intended to request formating according to the current
   language and would be used for most integers that GDB prints.  The
   exceptional cases were things like protocols where the format of
   the integer is a protocol thing, not a user-visible thing).  The
   parameter remains to preserve the information of what things might
   be printed with language-specific format, should we ever resurrect
   that capability.  */

void
print_longest (struct ui_file *stream, int format, int use_c_format,
	       LONGEST val_long)
{
  const char *val;

  switch (format)
    {
    case 'd':
      val = int_string (val_long, 10, 1, 0, 1); break;
    case 'u':
      val = int_string (val_long, 10, 0, 0, 1); break;
    case 'x':
      val = int_string (val_long, 16, 0, 0, use_c_format); break;
    case 'b':
      val = int_string (val_long, 16, 0, 2, 1); break;
    case 'h':
      val = int_string (val_long, 16, 0, 4, 1); break;
    case 'w':
      val = int_string (val_long, 16, 0, 8, 1); break;
    case 'g':
      val = int_string (val_long, 16, 0, 16, 1); break;
      break;
    case 'o':
      val = int_string (val_long, 8, 0, 0, use_c_format); break;
    default:
      internal_error (__FILE__, __LINE__,
		      _("failed internal consistency check"));
    } 
  fputs_filtered (val, stream);
}

/* This used to be a macro, but I don't think it is called often enough
   to merit such treatment.  */
/* Convert a LONGEST to an int.  This is used in contexts (e.g. number of
   arguments to a function, number in a value history, register number, etc.)
   where the value must not be larger than can fit in an int.  */

int
longest_to_int (LONGEST arg)
{
  /* Let the compiler do the work.  */
  int rtnval = (int) arg;

  /* Check for overflows or underflows.  */
  if (sizeof (LONGEST) > sizeof (int))
    {
      if (rtnval != arg)
	{
	  error (_("Value out of range."));
	}
    }
  return (rtnval);
}

/* Print a floating point value of type TYPE (not always a
   TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM.  */

void
print_floating (const gdb_byte *valaddr, struct type *type,
		struct ui_file *stream)
{
  DOUBLEST doub;
  int inv;
  const struct floatformat *fmt = NULL;
  unsigned len = TYPE_LENGTH (type);
  enum float_kind kind;

  /* If it is a floating-point, check for obvious problems.  */
  if (TYPE_CODE (type) == TYPE_CODE_FLT)
    fmt = floatformat_from_type (type);
  if (fmt != NULL)
    {
      kind = floatformat_classify (fmt, valaddr);
      if (kind == float_nan)
	{
	  if (floatformat_is_negative (fmt, valaddr))
	    fprintf_filtered (stream, "-");
	  fprintf_filtered (stream, "nan(");
	  fputs_filtered ("0x", stream);
	  fputs_filtered (floatformat_mantissa (fmt, valaddr), stream);
	  fprintf_filtered (stream, ")");
	  return;
	}
      else if (kind == float_infinite)
	{
	  if (floatformat_is_negative (fmt, valaddr))
	    fputs_filtered ("-", stream);
	  fputs_filtered ("inf", stream);
	  return;
	}
    }

  /* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
     isn't necessarily a TYPE_CODE_FLT.  Consequently, unpack_double
     needs to be used as that takes care of any necessary type
     conversions.  Such conversions are of course direct to DOUBLEST
     and disregard any possible target floating point limitations.
     For instance, a u64 would be converted and displayed exactly on a
     host with 80 bit DOUBLEST but with loss of information on a host
     with 64 bit DOUBLEST.  */

  doub = unpack_double (type, valaddr, &inv);
  if (inv)
    {
      fprintf_filtered (stream, "<invalid float value>");
      return;
    }

  /* FIXME: kettenis/2001-01-20: The following code makes too much
     assumptions about the host and target floating point format.  */

  /* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
     not necessarily be a TYPE_CODE_FLT, the below ignores that and
     instead uses the type's length to determine the precision of the
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