380 lines
9.6 KiB
C
380 lines
9.6 KiB
C
/* Handle set and show GDB commands.
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Copyright 2000, 2001, 2002 Free Software Foundation, Inc.
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#include "defs.h"
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#include <readline/tilde.h>
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#include "value.h"
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#include <ctype.h>
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#include "gdb_string.h"
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#include "ui-out.h"
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#include "cli/cli-decode.h"
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#include "cli/cli-cmds.h"
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#include "cli/cli-setshow.h"
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/* Prototypes for local functions */
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static int parse_binary_operation (char *);
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static enum auto_boolean
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parse_auto_binary_operation (const char *arg)
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{
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if (arg != NULL && *arg != '\0')
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{
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int length = strlen (arg);
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while (isspace (arg[length - 1]) && length > 0)
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length--;
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if (strncmp (arg, "on", length) == 0
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|| strncmp (arg, "1", length) == 0
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|| strncmp (arg, "yes", length) == 0
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|| strncmp (arg, "enable", length) == 0)
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return AUTO_BOOLEAN_TRUE;
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else if (strncmp (arg, "off", length) == 0
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|| strncmp (arg, "0", length) == 0
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|| strncmp (arg, "no", length) == 0
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|| strncmp (arg, "disable", length) == 0)
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return AUTO_BOOLEAN_FALSE;
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else if (strncmp (arg, "auto", length) == 0
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|| (strncmp (arg, "-1", length) == 0 && length > 1))
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return AUTO_BOOLEAN_AUTO;
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}
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error ("\"on\", \"off\" or \"auto\" expected.");
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return AUTO_BOOLEAN_AUTO; /* pacify GCC */
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}
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static int
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parse_binary_operation (char *arg)
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{
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int length;
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if (!arg || !*arg)
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return 1;
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length = strlen (arg);
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while (arg[length - 1] == ' ' || arg[length - 1] == '\t')
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length--;
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if (strncmp (arg, "on", length) == 0
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|| strncmp (arg, "1", length) == 0
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|| strncmp (arg, "yes", length) == 0
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|| strncmp (arg, "enable", length) == 0)
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return 1;
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else if (strncmp (arg, "off", length) == 0
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|| strncmp (arg, "0", length) == 0
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|| strncmp (arg, "no", length) == 0
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|| strncmp (arg, "disable", length) == 0)
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return 0;
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else
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{
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error ("\"on\" or \"off\" expected.");
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return 0;
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}
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}
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/* Do a "set" or "show" command. ARG is NULL if no argument, or the text
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of the argument, and FROM_TTY is nonzero if this command is being entered
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directly by the user (i.e. these are just like any other
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command). C is the command list element for the command. */
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void
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do_setshow_command (char *arg, int from_tty, struct cmd_list_element *c)
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{
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if (c->type == set_cmd)
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{
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switch (c->var_type)
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{
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case var_string:
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{
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char *new;
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char *p;
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char *q;
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int ch;
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if (arg == NULL)
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arg = "";
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new = (char *) xmalloc (strlen (arg) + 2);
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p = arg;
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q = new;
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while ((ch = *p++) != '\000')
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{
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if (ch == '\\')
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{
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/* \ at end of argument is used after spaces
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so they won't be lost. */
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/* This is obsolete now that we no longer strip
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trailing whitespace and actually, the backslash
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didn't get here in my test, readline or
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something did something funky with a backslash
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right before a newline. */
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if (*p == 0)
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break;
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ch = parse_escape (&p);
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if (ch == 0)
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break; /* C loses */
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else if (ch > 0)
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*q++ = ch;
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}
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else
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*q++ = ch;
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}
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#if 0
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if (*(p - 1) != '\\')
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*q++ = ' ';
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#endif
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*q++ = '\0';
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new = (char *) xrealloc (new, q - new);
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if (*(char **) c->var != NULL)
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xfree (*(char **) c->var);
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*(char **) c->var = new;
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}
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break;
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case var_string_noescape:
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if (arg == NULL)
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arg = "";
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if (*(char **) c->var != NULL)
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xfree (*(char **) c->var);
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*(char **) c->var = savestring (arg, strlen (arg));
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break;
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case var_filename:
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if (arg == NULL)
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error_no_arg ("filename to set it to.");
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if (*(char **) c->var != NULL)
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xfree (*(char **) c->var);
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*(char **) c->var = tilde_expand (arg);
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break;
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case var_boolean:
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*(int *) c->var = parse_binary_operation (arg);
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break;
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case var_auto_boolean:
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*(enum auto_boolean *) c->var = parse_auto_binary_operation (arg);
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break;
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case var_uinteger:
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if (arg == NULL)
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error_no_arg ("integer to set it to.");
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*(unsigned int *) c->var = parse_and_eval_long (arg);
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if (*(unsigned int *) c->var == 0)
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*(unsigned int *) c->var = UINT_MAX;
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break;
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case var_integer:
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{
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unsigned int val;
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if (arg == NULL)
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error_no_arg ("integer to set it to.");
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val = parse_and_eval_long (arg);
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if (val == 0)
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*(int *) c->var = INT_MAX;
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else if (val >= INT_MAX)
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error ("integer %u out of range", val);
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else
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*(int *) c->var = val;
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break;
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}
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case var_zinteger:
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if (arg == NULL)
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error_no_arg ("integer to set it to.");
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*(int *) c->var = parse_and_eval_long (arg);
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break;
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case var_enum:
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{
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int i;
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int len;
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int nmatches;
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const char *match = NULL;
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char *p;
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/* if no argument was supplied, print an informative error message */
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if (arg == NULL)
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{
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char msg[1024];
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strcpy (msg, "Requires an argument. Valid arguments are ");
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for (i = 0; c->enums[i]; i++)
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{
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if (i != 0)
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strcat (msg, ", ");
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strcat (msg, c->enums[i]);
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}
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strcat (msg, ".");
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error (msg);
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}
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p = strchr (arg, ' ');
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if (p)
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len = p - arg;
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else
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len = strlen (arg);
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nmatches = 0;
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for (i = 0; c->enums[i]; i++)
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if (strncmp (arg, c->enums[i], len) == 0)
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{
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if (c->enums[i][len] == '\0')
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{
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match = c->enums[i];
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nmatches = 1;
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break; /* exact match. */
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}
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else
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{
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match = c->enums[i];
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nmatches++;
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}
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}
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if (nmatches <= 0)
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error ("Undefined item: \"%s\".", arg);
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if (nmatches > 1)
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error ("Ambiguous item \"%s\".", arg);
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*(const char **) c->var = match;
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}
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break;
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default:
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error ("gdb internal error: bad var_type in do_setshow_command");
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}
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}
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else if (c->type == show_cmd)
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{
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struct cleanup *old_chain;
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struct ui_stream *stb;
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int quote;
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stb = ui_out_stream_new (uiout);
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old_chain = make_cleanup_ui_out_stream_delete (stb);
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/* Possibly call the pre hook. */
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if (c->pre_show_hook)
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(c->pre_show_hook) (c);
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/* Print doc minus "show" at start. */
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print_doc_line (gdb_stdout, c->doc + 5);
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ui_out_text (uiout, " is ");
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ui_out_wrap_hint (uiout, " ");
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quote = 0;
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switch (c->var_type)
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{
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case var_string:
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{
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unsigned char *p;
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if (*(unsigned char **) c->var)
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fputstr_filtered (*(unsigned char **) c->var, '"', stb->stream);
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quote = 1;
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}
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break;
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case var_string_noescape:
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case var_filename:
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case var_enum:
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if (*(char **) c->var)
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fputs_filtered (*(char **) c->var, stb->stream);
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quote = 1;
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break;
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case var_boolean:
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fputs_filtered (*(int *) c->var ? "on" : "off", stb->stream);
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break;
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case var_auto_boolean:
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switch (*(enum auto_boolean*) c->var)
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{
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case AUTO_BOOLEAN_TRUE:
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fputs_filtered ("on", stb->stream);
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break;
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case AUTO_BOOLEAN_FALSE:
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fputs_filtered ("off", stb->stream);
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break;
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case AUTO_BOOLEAN_AUTO:
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fputs_filtered ("auto", stb->stream);
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break;
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default:
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internal_error (__FILE__, __LINE__,
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"do_setshow_command: invalid var_auto_boolean");
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break;
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}
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break;
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case var_uinteger:
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if (*(unsigned int *) c->var == UINT_MAX)
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{
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fputs_filtered ("unlimited", stb->stream);
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break;
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}
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/* else fall through */
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case var_zinteger:
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fprintf_filtered (stb->stream, "%u", *(unsigned int *) c->var);
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break;
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case var_integer:
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if (*(int *) c->var == INT_MAX)
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{
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fputs_filtered ("unlimited", stb->stream);
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}
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else
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fprintf_filtered (stb->stream, "%d", *(int *) c->var);
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break;
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default:
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error ("gdb internal error: bad var_type in do_setshow_command");
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}
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if (quote)
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ui_out_text (uiout, "\"");
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ui_out_field_stream (uiout, "value", stb);
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if (quote)
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ui_out_text (uiout, "\"");
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ui_out_text (uiout, ".\n");
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do_cleanups (old_chain);
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}
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else
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error ("gdb internal error: bad cmd_type in do_setshow_command");
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c->func (c, NULL, from_tty);
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if (c->type == set_cmd && set_hook)
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set_hook (c);
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}
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/* Show all the settings in a list of show commands. */
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void
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cmd_show_list (struct cmd_list_element *list, int from_tty, char *prefix)
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{
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ui_out_tuple_begin (uiout, "showlist");
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for (; list != NULL; list = list->next)
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{
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/* If we find a prefix, run its list, prefixing our output by its
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prefix (with "show " skipped). */
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if (list->prefixlist && !list->abbrev_flag)
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{
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ui_out_tuple_begin (uiout, "optionlist");
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ui_out_field_string (uiout, "prefix", list->prefixname + 5);
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cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5);
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ui_out_tuple_end (uiout);
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}
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if (list->type == show_cmd)
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{
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ui_out_tuple_begin (uiout, "option");
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ui_out_text (uiout, prefix);
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ui_out_field_string (uiout, "name", list->name);
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ui_out_text (uiout, ": ");
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do_setshow_command ((char *) NULL, from_tty, list);
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ui_out_tuple_end (uiout);
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}
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}
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ui_out_tuple_end (uiout);
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}
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