c84141d67e
* value.h (value_bit_index, print_floating) (find_rt_vbase_offset): Make buffer a const bfd_byte. * valprint.c (print_floating): Update. * valarith.c (value_bit_index): Update. * valops.c (find_rt_vbase_offset): Update.
1290 lines
37 KiB
C
1290 lines
37 KiB
C
/* Print values for GDB, the GNU debugger.
|
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|
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Copyright 1986, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995,
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1996, 1997, 1998, 1999, 2000, 2001, 2002, 2005 Free Software
|
||
Foundation, Inc.
|
||
|
||
This file is part of GDB.
|
||
|
||
This program is free software; you can redistribute it and/or modify
|
||
it under the terms of the GNU General Public License as published by
|
||
the Free Software Foundation; either version 2 of the License, or
|
||
(at your option) any later version.
|
||
|
||
This program is distributed in the hope that it will be useful,
|
||
but WITHOUT ANY WARRANTY; without even the implied warranty of
|
||
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
|
||
GNU General Public License for more details.
|
||
|
||
You should have received a copy of the GNU General Public License
|
||
along with this program; if not, write to the Free Software
|
||
Foundation, Inc., 59 Temple Place - Suite 330,
|
||
Boston, MA 02111-1307, USA. */
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||
|
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#include "defs.h"
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#include "gdb_string.h"
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#include "symtab.h"
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#include "gdbtypes.h"
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#include "value.h"
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#include "gdbcore.h"
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||
#include "gdbcmd.h"
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#include "target.h"
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||
#include "language.h"
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#include "annotate.h"
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#include "valprint.h"
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#include "floatformat.h"
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#include "doublest.h"
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#include <errno.h>
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/* Prototypes for local functions */
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static int partial_memory_read (CORE_ADDR memaddr, char *myaddr,
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int len, int *errnoptr);
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static void show_print (char *, int);
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static void set_print (char *, int);
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static void set_radix (char *, int);
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static void show_radix (char *, int);
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static void set_input_radix (char *, int, struct cmd_list_element *);
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static void set_input_radix_1 (int, unsigned);
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static void set_output_radix (char *, int, struct cmd_list_element *);
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static void set_output_radix_1 (int, unsigned);
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void _initialize_valprint (void);
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/* Maximum number of chars to print for a string pointer value or vector
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contents, or UINT_MAX for no limit. Note that "set print elements 0"
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stores UINT_MAX in print_max, which displays in a show command as
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"unlimited". */
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unsigned int print_max;
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#define PRINT_MAX_DEFAULT 200 /* Start print_max off at this value. */
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|
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/* Default input and output radixes, and output format letter. */
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|
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unsigned input_radix = 10;
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unsigned output_radix = 10;
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int output_format = 0;
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/* Print repeat counts if there are more than this many repetitions of an
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element in an array. Referenced by the low level language dependent
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print routines. */
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unsigned int repeat_count_threshold = 10;
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|
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/* If nonzero, stops printing of char arrays at first null. */
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|
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int stop_print_at_null;
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|
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/* Controls pretty printing of structures. */
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|
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int prettyprint_structs;
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||
|
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/* Controls pretty printing of arrays. */
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||
|
||
int prettyprint_arrays;
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|
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/* If nonzero, causes unions inside structures or other unions to be
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printed. */
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|
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int unionprint; /* Controls printing of nested unions. */
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||
|
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/* If nonzero, causes machine addresses to be printed in certain contexts. */
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|
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int addressprint; /* Controls printing of machine addresses */
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|
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|
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/* Print data of type TYPE located at VALADDR (within GDB), which came from
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the inferior at address ADDRESS, onto stdio stream STREAM according to
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FORMAT (a letter, or 0 for natural format using TYPE).
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|
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If DEREF_REF is nonzero, then dereference references, otherwise just print
|
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them like pointers.
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||
|
||
The PRETTY parameter controls prettyprinting.
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|
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If the data are a string pointer, returns the number of string characters
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printed.
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|
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FIXME: The data at VALADDR is in target byte order. If gdb is ever
|
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enhanced to be able to debug more than the single target it was compiled
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for (specific CPU type and thus specific target byte ordering), then
|
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either the print routines are going to have to take this into account,
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or the data is going to have to be passed into here already converted
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to the host byte ordering, whichever is more convenient. */
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int
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val_print (struct type *type, char *valaddr, int embedded_offset,
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CORE_ADDR address, struct ui_file *stream, int format, int deref_ref,
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int recurse, enum val_prettyprint pretty)
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{
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struct type *real_type = check_typedef (type);
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if (pretty == Val_pretty_default)
|
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{
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pretty = prettyprint_structs ? Val_prettyprint : Val_no_prettyprint;
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}
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|
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QUIT;
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/* Ensure that the type is complete and not just a stub. If the type is
|
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only a stub and we can't find and substitute its complete type, then
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print appropriate string and return. */
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|
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if (TYPE_STUB (real_type))
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{
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fprintf_filtered (stream, "<incomplete type>");
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gdb_flush (stream);
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return (0);
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}
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return (LA_VAL_PRINT (type, valaddr, embedded_offset, address,
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stream, format, deref_ref, recurse, pretty));
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}
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|
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/* Print the value VAL in C-ish syntax on stream STREAM.
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FORMAT is a format-letter, or 0 for print in natural format of data type.
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If the object printed is a string pointer, returns
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the number of string bytes printed. */
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int
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value_print (struct value *val, struct ui_file *stream, int format,
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enum val_prettyprint pretty)
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{
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if (val == 0)
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{
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printf_filtered ("<address of value unknown>");
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return 0;
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}
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if (VALUE_OPTIMIZED_OUT (val))
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{
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printf_filtered ("<value optimized out>");
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return 0;
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}
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return LA_VALUE_PRINT (val, stream, format, pretty);
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}
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/* Called by various <lang>_val_print routines to print
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TYPE_CODE_INT's. TYPE is the type. VALADDR is the address of the
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value. STREAM is where to print the value. */
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void
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val_print_type_code_int (struct type *type, char *valaddr,
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struct ui_file *stream)
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{
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if (TYPE_LENGTH (type) > sizeof (LONGEST))
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{
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LONGEST val;
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if (TYPE_UNSIGNED (type)
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&& extract_long_unsigned_integer (valaddr, TYPE_LENGTH (type),
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&val))
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{
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print_longest (stream, 'u', 0, val);
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}
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else
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{
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/* Signed, or we couldn't turn an unsigned value into a
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LONGEST. For signed values, one could assume two's
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complement (a reasonable assumption, I think) and do
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better than this. */
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print_hex_chars (stream, (unsigned char *) valaddr,
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TYPE_LENGTH (type));
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}
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}
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else
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{
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print_longest (stream, TYPE_UNSIGNED (type) ? 'u' : 'd', 0,
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unpack_long (type, valaddr));
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}
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}
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/* Print a number according to FORMAT which is one of d,u,x,o,b,h,w,g.
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The raison d'etre of this function is to consolidate printing of
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LONG_LONG's into this one function. The format chars b,h,w,g are
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from print_scalar_formatted(). Numbers are printed using C
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format.
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USE_C_FORMAT means to use C format in all cases. Without it,
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'o' and 'x' format do not include the standard C radix prefix
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(leading 0 or 0x).
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Hilfinger/2004-09-09: USE_C_FORMAT was originally called USE_LOCAL
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and was intended to request formating according to the current
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language and would be used for most integers that GDB prints. The
|
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exceptional cases were things like protocols where the format of
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the integer is a protocol thing, not a user-visible thing). The
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parameter remains to preserve the information of what things might
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be printed with language-specific format, should we ever resurrect
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that capability. */
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void
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print_longest (struct ui_file *stream, int format, int use_c_format,
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LONGEST val_long)
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{
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const char *val;
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switch (format)
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{
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case 'd':
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val = int_string (val_long, 10, 1, 0, 1); break;
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case 'u':
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val = int_string (val_long, 10, 0, 0, 1); break;
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case 'x':
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val = int_string (val_long, 16, 0, 0, use_c_format); break;
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case 'b':
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val = int_string (val_long, 16, 0, 2, 1); break;
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case 'h':
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val = int_string (val_long, 16, 0, 4, 1); break;
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case 'w':
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val = int_string (val_long, 16, 0, 8, 1); break;
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case 'g':
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val = int_string (val_long, 16, 0, 16, 1); break;
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break;
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case 'o':
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val = int_string (val_long, 8, 0, 0, use_c_format); break;
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default:
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internal_error (__FILE__, __LINE__, "failed internal consistency check");
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}
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fputs_filtered (val, stream);
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}
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/* This used to be a macro, but I don't think it is called often enough
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to merit such treatment. */
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/* Convert a LONGEST to an int. This is used in contexts (e.g. number of
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arguments to a function, number in a value history, register number, etc.)
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where the value must not be larger than can fit in an int. */
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int
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longest_to_int (LONGEST arg)
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{
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/* Let the compiler do the work */
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int rtnval = (int) arg;
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/* Check for overflows or underflows */
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if (sizeof (LONGEST) > sizeof (int))
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{
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if (rtnval != arg)
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{
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error ("Value out of range.");
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}
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}
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return (rtnval);
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}
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/* Print a floating point value of type TYPE (not always a
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TYPE_CODE_FLT), pointed to in GDB by VALADDR, on STREAM. */
|
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void
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print_floating (const bfd_byte *valaddr, struct type *type,
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struct ui_file *stream)
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{
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DOUBLEST doub;
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int inv;
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const struct floatformat *fmt = NULL;
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unsigned len = TYPE_LENGTH (type);
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/* If it is a floating-point, check for obvious problems. */
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if (TYPE_CODE (type) == TYPE_CODE_FLT)
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fmt = floatformat_from_type (type);
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if (fmt != NULL && floatformat_is_nan (fmt, valaddr))
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{
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if (floatformat_is_negative (fmt, valaddr))
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fprintf_filtered (stream, "-");
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fprintf_filtered (stream, "nan(");
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fputs_filtered ("0x", stream);
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fputs_filtered (floatformat_mantissa (fmt, valaddr), stream);
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fprintf_filtered (stream, ")");
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return;
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}
|
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|
||
/* NOTE: cagney/2002-01-15: The TYPE passed into print_floating()
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isn't necessarily a TYPE_CODE_FLT. Consequently, unpack_double
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needs to be used as that takes care of any necessary type
|
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conversions. Such conversions are of course direct to DOUBLEST
|
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and disregard any possible target floating point limitations.
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For instance, a u64 would be converted and displayed exactly on a
|
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host with 80 bit DOUBLEST but with loss of information on a host
|
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with 64 bit DOUBLEST. */
|
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doub = unpack_double (type, valaddr, &inv);
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if (inv)
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{
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fprintf_filtered (stream, "<invalid float value>");
|
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return;
|
||
}
|
||
|
||
/* FIXME: kettenis/2001-01-20: The following code makes too much
|
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assumptions about the host and target floating point format. */
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|
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/* NOTE: cagney/2002-02-03: Since the TYPE of what was passed in may
|
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not necessarially be a TYPE_CODE_FLT, the below ignores that and
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instead uses the type's length to determine the precision of the
|
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floating-point value being printed. */
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if (len < sizeof (double))
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fprintf_filtered (stream, "%.9g", (double) doub);
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else if (len == sizeof (double))
|
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fprintf_filtered (stream, "%.17g", (double) doub);
|
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else
|
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#ifdef PRINTF_HAS_LONG_DOUBLE
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fprintf_filtered (stream, "%.35Lg", doub);
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#else
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/* This at least wins with values that are representable as
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doubles. */
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fprintf_filtered (stream, "%.17g", (double) doub);
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#endif
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}
|
||
|
||
void
|
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print_binary_chars (struct ui_file *stream, const bfd_byte *valaddr,
|
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unsigned len)
|
||
{
|
||
|
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#define BITS_IN_BYTES 8
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|
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const bfd_byte *p;
|
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unsigned int i;
|
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int b;
|
||
|
||
/* Declared "int" so it will be signed.
|
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* This ensures that right shift will shift in zeros.
|
||
*/
|
||
const int mask = 0x080;
|
||
|
||
/* FIXME: We should be not printing leading zeroes in most cases. */
|
||
|
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if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
|
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{
|
||
for (p = valaddr;
|
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p < valaddr + len;
|
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p++)
|
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{
|
||
/* Every byte has 8 binary characters; peel off
|
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* and print from the MSB end.
|
||
*/
|
||
for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
|
||
{
|
||
if (*p & (mask >> i))
|
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b = 1;
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else
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b = 0;
|
||
|
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fprintf_filtered (stream, "%1d", b);
|
||
}
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (p = valaddr + len - 1;
|
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p >= valaddr;
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p--)
|
||
{
|
||
for (i = 0; i < (BITS_IN_BYTES * sizeof (*p)); i++)
|
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{
|
||
if (*p & (mask >> i))
|
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b = 1;
|
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else
|
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b = 0;
|
||
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fprintf_filtered (stream, "%1d", b);
|
||
}
|
||
}
|
||
}
|
||
}
|
||
|
||
/* VALADDR points to an integer of LEN bytes.
|
||
* Print it in octal on stream or format it in buf.
|
||
*/
|
||
void
|
||
print_octal_chars (struct ui_file *stream, const bfd_byte *valaddr,
|
||
unsigned len)
|
||
{
|
||
const bfd_byte *p;
|
||
unsigned char octa1, octa2, octa3, carry;
|
||
int cycle;
|
||
|
||
/* FIXME: We should be not printing leading zeroes in most cases. */
|
||
|
||
|
||
/* Octal is 3 bits, which doesn't fit. Yuk. So we have to track
|
||
* the extra bits, which cycle every three bytes:
|
||
*
|
||
* Byte side: 0 1 2 3
|
||
* | | | |
|
||
* bit number 123 456 78 | 9 012 345 6 | 78 901 234 | 567 890 12 |
|
||
*
|
||
* Octal side: 0 1 carry 3 4 carry ...
|
||
*
|
||
* Cycle number: 0 1 2
|
||
*
|
||
* But of course we are printing from the high side, so we have to
|
||
* figure out where in the cycle we are so that we end up with no
|
||
* left over bits at the end.
|
||
*/
|
||
#define BITS_IN_OCTAL 3
|
||
#define HIGH_ZERO 0340
|
||
#define LOW_ZERO 0016
|
||
#define CARRY_ZERO 0003
|
||
#define HIGH_ONE 0200
|
||
#define MID_ONE 0160
|
||
#define LOW_ONE 0016
|
||
#define CARRY_ONE 0001
|
||
#define HIGH_TWO 0300
|
||
#define MID_TWO 0070
|
||
#define LOW_TWO 0007
|
||
|
||
/* For 32 we start in cycle 2, with two bits and one bit carry;
|
||
* for 64 in cycle in cycle 1, with one bit and a two bit carry.
|
||
*/
|
||
cycle = (len * BITS_IN_BYTES) % BITS_IN_OCTAL;
|
||
carry = 0;
|
||
|
||
fputs_filtered ("0", stream);
|
||
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
|
||
{
|
||
for (p = valaddr;
|
||
p < valaddr + len;
|
||
p++)
|
||
{
|
||
switch (cycle)
|
||
{
|
||
case 0:
|
||
/* No carry in, carry out two bits.
|
||
*/
|
||
octa1 = (HIGH_ZERO & *p) >> 5;
|
||
octa2 = (LOW_ZERO & *p) >> 2;
|
||
carry = (CARRY_ZERO & *p);
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
break;
|
||
|
||
case 1:
|
||
/* Carry in two bits, carry out one bit.
|
||
*/
|
||
octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
|
||
octa2 = (MID_ONE & *p) >> 4;
|
||
octa3 = (LOW_ONE & *p) >> 1;
|
||
carry = (CARRY_ONE & *p);
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
fprintf_filtered (stream, "%o", octa3);
|
||
break;
|
||
|
||
case 2:
|
||
/* Carry in one bit, no carry out.
|
||
*/
|
||
octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
|
||
octa2 = (MID_TWO & *p) >> 3;
|
||
octa3 = (LOW_TWO & *p);
|
||
carry = 0;
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
fprintf_filtered (stream, "%o", octa3);
|
||
break;
|
||
|
||
default:
|
||
error ("Internal error in octal conversion;");
|
||
}
|
||
|
||
cycle++;
|
||
cycle = cycle % BITS_IN_OCTAL;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (p = valaddr + len - 1;
|
||
p >= valaddr;
|
||
p--)
|
||
{
|
||
switch (cycle)
|
||
{
|
||
case 0:
|
||
/* Carry out, no carry in */
|
||
octa1 = (HIGH_ZERO & *p) >> 5;
|
||
octa2 = (LOW_ZERO & *p) >> 2;
|
||
carry = (CARRY_ZERO & *p);
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
break;
|
||
|
||
case 1:
|
||
/* Carry in, carry out */
|
||
octa1 = (carry << 1) | ((HIGH_ONE & *p) >> 7);
|
||
octa2 = (MID_ONE & *p) >> 4;
|
||
octa3 = (LOW_ONE & *p) >> 1;
|
||
carry = (CARRY_ONE & *p);
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
fprintf_filtered (stream, "%o", octa3);
|
||
break;
|
||
|
||
case 2:
|
||
/* Carry in, no carry out */
|
||
octa1 = (carry << 2) | ((HIGH_TWO & *p) >> 6);
|
||
octa2 = (MID_TWO & *p) >> 3;
|
||
octa3 = (LOW_TWO & *p);
|
||
carry = 0;
|
||
fprintf_filtered (stream, "%o", octa1);
|
||
fprintf_filtered (stream, "%o", octa2);
|
||
fprintf_filtered (stream, "%o", octa3);
|
||
break;
|
||
|
||
default:
|
||
error ("Internal error in octal conversion;");
|
||
}
|
||
|
||
cycle++;
|
||
cycle = cycle % BITS_IN_OCTAL;
|
||
}
|
||
}
|
||
|
||
}
|
||
|
||
/* VALADDR points to an integer of LEN bytes.
|
||
* Print it in decimal on stream or format it in buf.
|
||
*/
|
||
void
|
||
print_decimal_chars (struct ui_file *stream, const bfd_byte *valaddr,
|
||
unsigned len)
|
||
{
|
||
#define TEN 10
|
||
#define TWO_TO_FOURTH 16
|
||
#define CARRY_OUT( x ) ((x) / TEN) /* extend char to int */
|
||
#define CARRY_LEFT( x ) ((x) % TEN)
|
||
#define SHIFT( x ) ((x) << 4)
|
||
#define START_P \
|
||
((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? valaddr : valaddr + len - 1)
|
||
#define NOT_END_P \
|
||
((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? (p < valaddr + len) : (p >= valaddr))
|
||
#define NEXT_P \
|
||
((TARGET_BYTE_ORDER == BFD_ENDIAN_BIG) ? p++ : p-- )
|
||
#define LOW_NIBBLE( x ) ( (x) & 0x00F)
|
||
#define HIGH_NIBBLE( x ) (((x) & 0x0F0) >> 4)
|
||
|
||
const bfd_byte *p;
|
||
unsigned char *digits;
|
||
int carry;
|
||
int decimal_len;
|
||
int i, j, decimal_digits;
|
||
int dummy;
|
||
int flip;
|
||
|
||
/* Base-ten number is less than twice as many digits
|
||
* as the base 16 number, which is 2 digits per byte.
|
||
*/
|
||
decimal_len = len * 2 * 2;
|
||
digits = xmalloc (decimal_len);
|
||
|
||
for (i = 0; i < decimal_len; i++)
|
||
{
|
||
digits[i] = 0;
|
||
}
|
||
|
||
/* Ok, we have an unknown number of bytes of data to be printed in
|
||
* decimal.
|
||
*
|
||
* Given a hex number (in nibbles) as XYZ, we start by taking X and
|
||
* decemalizing it as "x1 x2" in two decimal nibbles. Then we multiply
|
||
* the nibbles by 16, add Y and re-decimalize. Repeat with Z.
|
||
*
|
||
* The trick is that "digits" holds a base-10 number, but sometimes
|
||
* the individual digits are > 10.
|
||
*
|
||
* Outer loop is per nibble (hex digit) of input, from MSD end to
|
||
* LSD end.
|
||
*/
|
||
decimal_digits = 0; /* Number of decimal digits so far */
|
||
p = START_P;
|
||
flip = 0;
|
||
while (NOT_END_P)
|
||
{
|
||
/*
|
||
* Multiply current base-ten number by 16 in place.
|
||
* Each digit was between 0 and 9, now is between
|
||
* 0 and 144.
|
||
*/
|
||
for (j = 0; j < decimal_digits; j++)
|
||
{
|
||
digits[j] = SHIFT (digits[j]);
|
||
}
|
||
|
||
/* Take the next nibble off the input and add it to what
|
||
* we've got in the LSB position. Bottom 'digit' is now
|
||
* between 0 and 159.
|
||
*
|
||
* "flip" is used to run this loop twice for each byte.
|
||
*/
|
||
if (flip == 0)
|
||
{
|
||
/* Take top nibble.
|
||
*/
|
||
digits[0] += HIGH_NIBBLE (*p);
|
||
flip = 1;
|
||
}
|
||
else
|
||
{
|
||
/* Take low nibble and bump our pointer "p".
|
||
*/
|
||
digits[0] += LOW_NIBBLE (*p);
|
||
NEXT_P;
|
||
flip = 0;
|
||
}
|
||
|
||
/* Re-decimalize. We have to do this often enough
|
||
* that we don't overflow, but once per nibble is
|
||
* overkill. Easier this way, though. Note that the
|
||
* carry is often larger than 10 (e.g. max initial
|
||
* carry out of lowest nibble is 15, could bubble all
|
||
* the way up greater than 10). So we have to do
|
||
* the carrying beyond the last current digit.
|
||
*/
|
||
carry = 0;
|
||
for (j = 0; j < decimal_len - 1; j++)
|
||
{
|
||
digits[j] += carry;
|
||
|
||
/* "/" won't handle an unsigned char with
|
||
* a value that if signed would be negative.
|
||
* So extend to longword int via "dummy".
|
||
*/
|
||
dummy = digits[j];
|
||
carry = CARRY_OUT (dummy);
|
||
digits[j] = CARRY_LEFT (dummy);
|
||
|
||
if (j >= decimal_digits && carry == 0)
|
||
{
|
||
/*
|
||
* All higher digits are 0 and we
|
||
* no longer have a carry.
|
||
*
|
||
* Note: "j" is 0-based, "decimal_digits" is
|
||
* 1-based.
|
||
*/
|
||
decimal_digits = j + 1;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Ok, now "digits" is the decimal representation, with
|
||
* the "decimal_digits" actual digits. Print!
|
||
*/
|
||
for (i = decimal_digits - 1; i >= 0; i--)
|
||
{
|
||
fprintf_filtered (stream, "%1d", digits[i]);
|
||
}
|
||
xfree (digits);
|
||
}
|
||
|
||
/* VALADDR points to an integer of LEN bytes. Print it in hex on stream. */
|
||
|
||
void
|
||
print_hex_chars (struct ui_file *stream, const bfd_byte *valaddr,
|
||
unsigned len)
|
||
{
|
||
const bfd_byte *p;
|
||
|
||
/* FIXME: We should be not printing leading zeroes in most cases. */
|
||
|
||
fputs_filtered ("0x", stream);
|
||
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
|
||
{
|
||
for (p = valaddr;
|
||
p < valaddr + len;
|
||
p++)
|
||
{
|
||
fprintf_filtered (stream, "%02x", *p);
|
||
}
|
||
}
|
||
else
|
||
{
|
||
for (p = valaddr + len - 1;
|
||
p >= valaddr;
|
||
p--)
|
||
{
|
||
fprintf_filtered (stream, "%02x", *p);
|
||
}
|
||
}
|
||
}
|
||
|
||
/* VALADDR points to a char integer of LEN bytes. Print it out in appropriate language form on stream.
|
||
Omit any leading zero chars. */
|
||
|
||
void
|
||
print_char_chars (struct ui_file *stream, const bfd_byte *valaddr,
|
||
unsigned len)
|
||
{
|
||
const bfd_byte *p;
|
||
|
||
if (TARGET_BYTE_ORDER == BFD_ENDIAN_BIG)
|
||
{
|
||
p = valaddr;
|
||
while (p < valaddr + len - 1 && *p == 0)
|
||
++p;
|
||
|
||
while (p < valaddr + len)
|
||
{
|
||
LA_EMIT_CHAR (*p, stream, '\'');
|
||
++p;
|
||
}
|
||
}
|
||
else
|
||
{
|
||
p = valaddr + len - 1;
|
||
while (p > valaddr && *p == 0)
|
||
--p;
|
||
|
||
while (p >= valaddr)
|
||
{
|
||
LA_EMIT_CHAR (*p, stream, '\'');
|
||
--p;
|
||
}
|
||
}
|
||
}
|
||
|
||
/* Called by various <lang>_val_print routines to print elements of an
|
||
array in the form "<elem1>, <elem2>, <elem3>, ...".
|
||
|
||
(FIXME?) Assumes array element separator is a comma, which is correct
|
||
for all languages currently handled.
|
||
(FIXME?) Some languages have a notation for repeated array elements,
|
||
perhaps we should try to use that notation when appropriate.
|
||
*/
|
||
|
||
void
|
||
val_print_array_elements (struct type *type, char *valaddr, CORE_ADDR address,
|
||
struct ui_file *stream, int format, int deref_ref,
|
||
int recurse, enum val_prettyprint pretty,
|
||
unsigned int i)
|
||
{
|
||
unsigned int things_printed = 0;
|
||
unsigned len;
|
||
struct type *elttype;
|
||
unsigned eltlen;
|
||
/* Position of the array element we are examining to see
|
||
whether it is repeated. */
|
||
unsigned int rep1;
|
||
/* Number of repetitions we have detected so far. */
|
||
unsigned int reps;
|
||
|
||
elttype = TYPE_TARGET_TYPE (type);
|
||
eltlen = TYPE_LENGTH (check_typedef (elttype));
|
||
len = TYPE_LENGTH (type) / eltlen;
|
||
|
||
annotate_array_section_begin (i, elttype);
|
||
|
||
for (; i < len && things_printed < print_max; i++)
|
||
{
|
||
if (i != 0)
|
||
{
|
||
if (prettyprint_arrays)
|
||
{
|
||
fprintf_filtered (stream, ",\n");
|
||
print_spaces_filtered (2 + 2 * recurse, stream);
|
||
}
|
||
else
|
||
{
|
||
fprintf_filtered (stream, ", ");
|
||
}
|
||
}
|
||
wrap_here (n_spaces (2 + 2 * recurse));
|
||
|
||
rep1 = i + 1;
|
||
reps = 1;
|
||
while ((rep1 < len) &&
|
||
!memcmp (valaddr + i * eltlen, valaddr + rep1 * eltlen, eltlen))
|
||
{
|
||
++reps;
|
||
++rep1;
|
||
}
|
||
|
||
if (reps > repeat_count_threshold)
|
||
{
|
||
val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
|
||
deref_ref, recurse + 1, pretty);
|
||
annotate_elt_rep (reps);
|
||
fprintf_filtered (stream, " <repeats %u times>", reps);
|
||
annotate_elt_rep_end ();
|
||
|
||
i = rep1 - 1;
|
||
things_printed += repeat_count_threshold;
|
||
}
|
||
else
|
||
{
|
||
val_print (elttype, valaddr + i * eltlen, 0, 0, stream, format,
|
||
deref_ref, recurse + 1, pretty);
|
||
annotate_elt ();
|
||
things_printed++;
|
||
}
|
||
}
|
||
annotate_array_section_end ();
|
||
if (i < len)
|
||
{
|
||
fprintf_filtered (stream, "...");
|
||
}
|
||
}
|
||
|
||
/* Read LEN bytes of target memory at address MEMADDR, placing the
|
||
results in GDB's memory at MYADDR. Returns a count of the bytes
|
||
actually read, and optionally an errno value in the location
|
||
pointed to by ERRNOPTR if ERRNOPTR is non-null. */
|
||
|
||
/* FIXME: cagney/1999-10-14: Only used by val_print_string. Can this
|
||
function be eliminated. */
|
||
|
||
static int
|
||
partial_memory_read (CORE_ADDR memaddr, char *myaddr, int len, int *errnoptr)
|
||
{
|
||
int nread; /* Number of bytes actually read. */
|
||
int errcode; /* Error from last read. */
|
||
|
||
/* First try a complete read. */
|
||
errcode = target_read_memory (memaddr, myaddr, len);
|
||
if (errcode == 0)
|
||
{
|
||
/* Got it all. */
|
||
nread = len;
|
||
}
|
||
else
|
||
{
|
||
/* Loop, reading one byte at a time until we get as much as we can. */
|
||
for (errcode = 0, nread = 0; len > 0 && errcode == 0; nread++, len--)
|
||
{
|
||
errcode = target_read_memory (memaddr++, myaddr++, 1);
|
||
}
|
||
/* If an error, the last read was unsuccessful, so adjust count. */
|
||
if (errcode != 0)
|
||
{
|
||
nread--;
|
||
}
|
||
}
|
||
if (errnoptr != NULL)
|
||
{
|
||
*errnoptr = errcode;
|
||
}
|
||
return (nread);
|
||
}
|
||
|
||
/* Print a string from the inferior, starting at ADDR and printing up to LEN
|
||
characters, of WIDTH bytes a piece, to STREAM. If LEN is -1, printing
|
||
stops at the first null byte, otherwise printing proceeds (including null
|
||
bytes) until either print_max or LEN characters have been printed,
|
||
whichever is smaller. */
|
||
|
||
/* FIXME: Use target_read_string. */
|
||
|
||
int
|
||
val_print_string (CORE_ADDR addr, int len, int width, struct ui_file *stream)
|
||
{
|
||
int force_ellipsis = 0; /* Force ellipsis to be printed if nonzero. */
|
||
int errcode; /* Errno returned from bad reads. */
|
||
unsigned int fetchlimit; /* Maximum number of chars to print. */
|
||
unsigned int nfetch; /* Chars to fetch / chars fetched. */
|
||
unsigned int chunksize; /* Size of each fetch, in chars. */
|
||
char *buffer = NULL; /* Dynamically growable fetch buffer. */
|
||
char *bufptr; /* Pointer to next available byte in buffer. */
|
||
char *limit; /* First location past end of fetch buffer. */
|
||
struct cleanup *old_chain = NULL; /* Top of the old cleanup chain. */
|
||
int found_nul; /* Non-zero if we found the nul char */
|
||
|
||
/* First we need to figure out the limit on the number of characters we are
|
||
going to attempt to fetch and print. This is actually pretty simple. If
|
||
LEN >= zero, then the limit is the minimum of LEN and print_max. If
|
||
LEN is -1, then the limit is print_max. This is true regardless of
|
||
whether print_max is zero, UINT_MAX (unlimited), or something in between,
|
||
because finding the null byte (or available memory) is what actually
|
||
limits the fetch. */
|
||
|
||
fetchlimit = (len == -1 ? print_max : min (len, print_max));
|
||
|
||
/* Now decide how large of chunks to try to read in one operation. This
|
||
is also pretty simple. If LEN >= zero, then we want fetchlimit chars,
|
||
so we might as well read them all in one operation. If LEN is -1, we
|
||
are looking for a null terminator to end the fetching, so we might as
|
||
well read in blocks that are large enough to be efficient, but not so
|
||
large as to be slow if fetchlimit happens to be large. So we choose the
|
||
minimum of 8 and fetchlimit. We used to use 200 instead of 8 but
|
||
200 is way too big for remote debugging over a serial line. */
|
||
|
||
chunksize = (len == -1 ? min (8, fetchlimit) : fetchlimit);
|
||
|
||
/* Loop until we either have all the characters to print, or we encounter
|
||
some error, such as bumping into the end of the address space. */
|
||
|
||
found_nul = 0;
|
||
old_chain = make_cleanup (null_cleanup, 0);
|
||
|
||
if (len > 0)
|
||
{
|
||
buffer = (char *) xmalloc (len * width);
|
||
bufptr = buffer;
|
||
old_chain = make_cleanup (xfree, buffer);
|
||
|
||
nfetch = partial_memory_read (addr, bufptr, len * width, &errcode)
|
||
/ width;
|
||
addr += nfetch * width;
|
||
bufptr += nfetch * width;
|
||
}
|
||
else if (len == -1)
|
||
{
|
||
unsigned long bufsize = 0;
|
||
do
|
||
{
|
||
QUIT;
|
||
nfetch = min (chunksize, fetchlimit - bufsize);
|
||
|
||
if (buffer == NULL)
|
||
buffer = (char *) xmalloc (nfetch * width);
|
||
else
|
||
{
|
||
discard_cleanups (old_chain);
|
||
buffer = (char *) xrealloc (buffer, (nfetch + bufsize) * width);
|
||
}
|
||
|
||
old_chain = make_cleanup (xfree, buffer);
|
||
bufptr = buffer + bufsize * width;
|
||
bufsize += nfetch;
|
||
|
||
/* Read as much as we can. */
|
||
nfetch = partial_memory_read (addr, bufptr, nfetch * width, &errcode)
|
||
/ width;
|
||
|
||
/* Scan this chunk for the null byte that terminates the string
|
||
to print. If found, we don't need to fetch any more. Note
|
||
that bufptr is explicitly left pointing at the next character
|
||
after the null byte, or at the next character after the end of
|
||
the buffer. */
|
||
|
||
limit = bufptr + nfetch * width;
|
||
while (bufptr < limit)
|
||
{
|
||
unsigned long c;
|
||
|
||
c = extract_unsigned_integer (bufptr, width);
|
||
addr += width;
|
||
bufptr += width;
|
||
if (c == 0)
|
||
{
|
||
/* We don't care about any error which happened after
|
||
the NULL terminator. */
|
||
errcode = 0;
|
||
found_nul = 1;
|
||
break;
|
||
}
|
||
}
|
||
}
|
||
while (errcode == 0 /* no error */
|
||
&& bufptr - buffer < fetchlimit * width /* no overrun */
|
||
&& !found_nul); /* haven't found nul yet */
|
||
}
|
||
else
|
||
{ /* length of string is really 0! */
|
||
buffer = bufptr = NULL;
|
||
errcode = 0;
|
||
}
|
||
|
||
/* bufptr and addr now point immediately beyond the last byte which we
|
||
consider part of the string (including a '\0' which ends the string). */
|
||
|
||
/* We now have either successfully filled the buffer to fetchlimit, or
|
||
terminated early due to an error or finding a null char when LEN is -1. */
|
||
|
||
if (len == -1 && !found_nul)
|
||
{
|
||
char *peekbuf;
|
||
|
||
/* We didn't find a null terminator we were looking for. Attempt
|
||
to peek at the next character. If not successful, or it is not
|
||
a null byte, then force ellipsis to be printed. */
|
||
|
||
peekbuf = (char *) alloca (width);
|
||
|
||
if (target_read_memory (addr, peekbuf, width) == 0
|
||
&& extract_unsigned_integer (peekbuf, width) != 0)
|
||
force_ellipsis = 1;
|
||
}
|
||
else if ((len >= 0 && errcode != 0) || (len > (bufptr - buffer) / width))
|
||
{
|
||
/* Getting an error when we have a requested length, or fetching less
|
||
than the number of characters actually requested, always make us
|
||
print ellipsis. */
|
||
force_ellipsis = 1;
|
||
}
|
||
|
||
QUIT;
|
||
|
||
/* If we get an error before fetching anything, don't print a string.
|
||
But if we fetch something and then get an error, print the string
|
||
and then the error message. */
|
||
if (errcode == 0 || bufptr > buffer)
|
||
{
|
||
if (addressprint)
|
||
{
|
||
fputs_filtered (" ", stream);
|
||
}
|
||
LA_PRINT_STRING (stream, buffer, (bufptr - buffer) / width, width, force_ellipsis);
|
||
}
|
||
|
||
if (errcode != 0)
|
||
{
|
||
if (errcode == EIO)
|
||
{
|
||
fprintf_filtered (stream, " <Address ");
|
||
print_address_numeric (addr, 1, stream);
|
||
fprintf_filtered (stream, " out of bounds>");
|
||
}
|
||
else
|
||
{
|
||
fprintf_filtered (stream, " <Error reading address ");
|
||
print_address_numeric (addr, 1, stream);
|
||
fprintf_filtered (stream, ": %s>", safe_strerror (errcode));
|
||
}
|
||
}
|
||
gdb_flush (stream);
|
||
do_cleanups (old_chain);
|
||
return ((bufptr - buffer) / width);
|
||
}
|
||
|
||
|
||
/* Validate an input or output radix setting, and make sure the user
|
||
knows what they really did here. Radix setting is confusing, e.g.
|
||
setting the input radix to "10" never changes it! */
|
||
|
||
static void
|
||
set_input_radix (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
set_input_radix_1 (from_tty, input_radix);
|
||
}
|
||
|
||
static void
|
||
set_input_radix_1 (int from_tty, unsigned radix)
|
||
{
|
||
/* We don't currently disallow any input radix except 0 or 1, which don't
|
||
make any mathematical sense. In theory, we can deal with any input
|
||
radix greater than 1, even if we don't have unique digits for every
|
||
value from 0 to radix-1, but in practice we lose on large radix values.
|
||
We should either fix the lossage or restrict the radix range more.
|
||
(FIXME). */
|
||
|
||
if (radix < 2)
|
||
{
|
||
/* FIXME: cagney/2002-03-17: This needs to revert the bad radix
|
||
value. */
|
||
error ("Nonsense input radix ``decimal %u''; input radix unchanged.",
|
||
radix);
|
||
}
|
||
input_radix = radix;
|
||
if (from_tty)
|
||
{
|
||
printf_filtered ("Input radix now set to decimal %u, hex %x, octal %o.\n",
|
||
radix, radix, radix);
|
||
}
|
||
}
|
||
|
||
static void
|
||
set_output_radix (char *args, int from_tty, struct cmd_list_element *c)
|
||
{
|
||
set_output_radix_1 (from_tty, output_radix);
|
||
}
|
||
|
||
static void
|
||
set_output_radix_1 (int from_tty, unsigned radix)
|
||
{
|
||
/* Validate the radix and disallow ones that we aren't prepared to
|
||
handle correctly, leaving the radix unchanged. */
|
||
switch (radix)
|
||
{
|
||
case 16:
|
||
output_format = 'x'; /* hex */
|
||
break;
|
||
case 10:
|
||
output_format = 0; /* decimal */
|
||
break;
|
||
case 8:
|
||
output_format = 'o'; /* octal */
|
||
break;
|
||
default:
|
||
/* FIXME: cagney/2002-03-17: This needs to revert the bad radix
|
||
value. */
|
||
error ("Unsupported output radix ``decimal %u''; output radix unchanged.",
|
||
radix);
|
||
}
|
||
output_radix = radix;
|
||
if (from_tty)
|
||
{
|
||
printf_filtered ("Output radix now set to decimal %u, hex %x, octal %o.\n",
|
||
radix, radix, radix);
|
||
}
|
||
}
|
||
|
||
/* Set both the input and output radix at once. Try to set the output radix
|
||
first, since it has the most restrictive range. An radix that is valid as
|
||
an output radix is also valid as an input radix.
|
||
|
||
It may be useful to have an unusual input radix. If the user wishes to
|
||
set an input radix that is not valid as an output radix, he needs to use
|
||
the 'set input-radix' command. */
|
||
|
||
static void
|
||
set_radix (char *arg, int from_tty)
|
||
{
|
||
unsigned radix;
|
||
|
||
radix = (arg == NULL) ? 10 : parse_and_eval_long (arg);
|
||
set_output_radix_1 (0, radix);
|
||
set_input_radix_1 (0, radix);
|
||
if (from_tty)
|
||
{
|
||
printf_filtered ("Input and output radices now set to decimal %u, hex %x, octal %o.\n",
|
||
radix, radix, radix);
|
||
}
|
||
}
|
||
|
||
/* Show both the input and output radices. */
|
||
|
||
static void
|
||
show_radix (char *arg, int from_tty)
|
||
{
|
||
if (from_tty)
|
||
{
|
||
if (input_radix == output_radix)
|
||
{
|
||
printf_filtered ("Input and output radices set to decimal %u, hex %x, octal %o.\n",
|
||
input_radix, input_radix, input_radix);
|
||
}
|
||
else
|
||
{
|
||
printf_filtered ("Input radix set to decimal %u, hex %x, octal %o.\n",
|
||
input_radix, input_radix, input_radix);
|
||
printf_filtered ("Output radix set to decimal %u, hex %x, octal %o.\n",
|
||
output_radix, output_radix, output_radix);
|
||
}
|
||
}
|
||
}
|
||
|
||
|
||
static void
|
||
set_print (char *arg, int from_tty)
|
||
{
|
||
printf_unfiltered (
|
||
"\"set print\" must be followed by the name of a print subcommand.\n");
|
||
help_list (setprintlist, "set print ", -1, gdb_stdout);
|
||
}
|
||
|
||
static void
|
||
show_print (char *args, int from_tty)
|
||
{
|
||
cmd_show_list (showprintlist, from_tty, "");
|
||
}
|
||
|
||
void
|
||
_initialize_valprint (void)
|
||
{
|
||
struct cmd_list_element *c;
|
||
|
||
add_prefix_cmd ("print", no_class, set_print,
|
||
"Generic command for setting how things print.",
|
||
&setprintlist, "set print ", 0, &setlist);
|
||
add_alias_cmd ("p", "print", no_class, 1, &setlist);
|
||
/* prefer set print to set prompt */
|
||
add_alias_cmd ("pr", "print", no_class, 1, &setlist);
|
||
|
||
add_prefix_cmd ("print", no_class, show_print,
|
||
"Generic command for showing print settings.",
|
||
&showprintlist, "show print ", 0, &showlist);
|
||
add_alias_cmd ("p", "print", no_class, 1, &showlist);
|
||
add_alias_cmd ("pr", "print", no_class, 1, &showlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("elements", no_class, var_uinteger, (char *) &print_max,
|
||
"Set limit on string chars or array elements to print.\n\
|
||
\"set print elements 0\" causes there to be no limit.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("null-stop", no_class, var_boolean,
|
||
(char *) &stop_print_at_null,
|
||
"Set printing of char arrays to stop at first null char.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("repeats", no_class, var_uinteger,
|
||
(char *) &repeat_count_threshold,
|
||
"Set threshold for repeated print elements.\n\
|
||
\"set print repeats 0\" causes all elements to be individually printed.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("pretty", class_support, var_boolean,
|
||
(char *) &prettyprint_structs,
|
||
"Set prettyprinting of structures.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("union", class_support, var_boolean, (char *) &unionprint,
|
||
"Set printing of unions interior to structures.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("array", class_support, var_boolean,
|
||
(char *) &prettyprint_arrays,
|
||
"Set prettyprinting of arrays.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
deprecated_add_show_from_set
|
||
(add_set_cmd ("address", class_support, var_boolean, (char *) &addressprint,
|
||
"Set printing of addresses.",
|
||
&setprintlist),
|
||
&showprintlist);
|
||
|
||
c = add_set_cmd ("input-radix", class_support, var_uinteger,
|
||
(char *) &input_radix,
|
||
"Set default input radix for entering numbers.",
|
||
&setlist);
|
||
deprecated_add_show_from_set (c, &showlist);
|
||
set_cmd_sfunc (c, set_input_radix);
|
||
|
||
c = add_set_cmd ("output-radix", class_support, var_uinteger,
|
||
(char *) &output_radix,
|
||
"Set default output radix for printing of values.",
|
||
&setlist);
|
||
deprecated_add_show_from_set (c, &showlist);
|
||
set_cmd_sfunc (c, set_output_radix);
|
||
|
||
/* The "set radix" and "show radix" commands are special in that
|
||
they are like normal set and show commands but allow two normally
|
||
independent variables to be either set or shown with a single
|
||
command. So the usual deprecated_add_set_cmd() and
|
||
add_show_from_set() commands aren't really appropriate. */
|
||
add_cmd ("radix", class_support, set_radix,
|
||
"Set default input and output number radices.\n\
|
||
Use 'set input-radix' or 'set output-radix' to independently set each.\n\
|
||
Without an argument, sets both radices back to the default value of 10.",
|
||
&setlist);
|
||
add_cmd ("radix", class_support, show_radix,
|
||
"Show the default input and output number radices.\n\
|
||
Use 'show input-radix' or 'show output-radix' to independently show each.",
|
||
&showlist);
|
||
|
||
/* Give people the defaults which they are used to. */
|
||
prettyprint_structs = 0;
|
||
prettyprint_arrays = 0;
|
||
unionprint = 1;
|
||
addressprint = 1;
|
||
print_max = PRINT_MAX_DEFAULT;
|
||
}
|