2004-02-28 Andrew Cagney <cagney@redhat.com>
[deliverable/binutils-gdb.git] / gdb / cli / cli-setshow.c
CommitLineData
d318976c 1/* Handle set and show GDB commands.
8926118c 2
3b31d625 3 Copyright 2000, 2001, 2002, 2003 Free Software Foundation, Inc.
d318976c
FN
4
5 This program is free software; you can redistribute it and/or modify
6 it under the terms of the GNU General Public License as published by
7 the Free Software Foundation; either version 2 of the License, or
8 (at your option) any later version.
9
10 This program is distributed in the hope that it will be useful,
11 but WITHOUT ANY WARRANTY; without even the implied warranty of
12 MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13 GNU General Public License for more details.
14
15 You should have received a copy of the GNU General Public License
16 along with this program; if not, write to the Free Software
17 Foundation, Inc., 59 Temple Place - Suite 330,
18 Boston, MA 02111-1307, USA. */
19
20#include "defs.h"
dbda9972 21#include "readline/tilde.h"
d318976c
FN
22#include "value.h"
23#include <ctype.h>
d318976c 24#include "gdb_string.h"
d318976c 25
d318976c 26#include "ui-out.h"
d318976c
FN
27
28#include "cli/cli-decode.h"
29#include "cli/cli-cmds.h"
30#include "cli/cli-setshow.h"
31
32/* Prototypes for local functions */
33
34static int parse_binary_operation (char *);
35
d318976c 36\f
7f19b9a2 37static enum auto_boolean
d318976c
FN
38parse_auto_binary_operation (const char *arg)
39{
40 if (arg != NULL && *arg != '\0')
41 {
42 int length = strlen (arg);
43 while (isspace (arg[length - 1]) && length > 0)
44 length--;
45 if (strncmp (arg, "on", length) == 0
46 || strncmp (arg, "1", length) == 0
47 || strncmp (arg, "yes", length) == 0
48 || strncmp (arg, "enable", length) == 0)
7f19b9a2 49 return AUTO_BOOLEAN_TRUE;
d318976c
FN
50 else if (strncmp (arg, "off", length) == 0
51 || strncmp (arg, "0", length) == 0
52 || strncmp (arg, "no", length) == 0
53 || strncmp (arg, "disable", length) == 0)
7f19b9a2 54 return AUTO_BOOLEAN_FALSE;
d318976c
FN
55 else if (strncmp (arg, "auto", length) == 0
56 || (strncmp (arg, "-1", length) == 0 && length > 1))
7f19b9a2 57 return AUTO_BOOLEAN_AUTO;
d318976c
FN
58 }
59 error ("\"on\", \"off\" or \"auto\" expected.");
7f19b9a2 60 return AUTO_BOOLEAN_AUTO; /* pacify GCC */
d318976c
FN
61}
62
63static int
64parse_binary_operation (char *arg)
65{
66 int length;
67
68 if (!arg || !*arg)
69 return 1;
70
71 length = strlen (arg);
72
73 while (arg[length - 1] == ' ' || arg[length - 1] == '\t')
74 length--;
75
76 if (strncmp (arg, "on", length) == 0
77 || strncmp (arg, "1", length) == 0
78 || strncmp (arg, "yes", length) == 0
79 || strncmp (arg, "enable", length) == 0)
80 return 1;
81 else if (strncmp (arg, "off", length) == 0
82 || strncmp (arg, "0", length) == 0
83 || strncmp (arg, "no", length) == 0
84 || strncmp (arg, "disable", length) == 0)
85 return 0;
86 else
87 {
88 error ("\"on\" or \"off\" expected.");
89 return 0;
90 }
91}
92\f
93/* Do a "set" or "show" command. ARG is NULL if no argument, or the text
94 of the argument, and FROM_TTY is nonzero if this command is being entered
95 directly by the user (i.e. these are just like any other
96 command). C is the command list element for the command. */
97
98void
99do_setshow_command (char *arg, int from_tty, struct cmd_list_element *c)
100{
101 if (c->type == set_cmd)
102 {
103 switch (c->var_type)
104 {
105 case var_string:
106 {
107 char *new;
108 char *p;
109 char *q;
110 int ch;
111
112 if (arg == NULL)
113 arg = "";
114 new = (char *) xmalloc (strlen (arg) + 2);
115 p = arg;
116 q = new;
117 while ((ch = *p++) != '\000')
118 {
119 if (ch == '\\')
120 {
121 /* \ at end of argument is used after spaces
122 so they won't be lost. */
123 /* This is obsolete now that we no longer strip
124 trailing whitespace and actually, the backslash
125 didn't get here in my test, readline or
126 something did something funky with a backslash
127 right before a newline. */
128 if (*p == 0)
129 break;
130 ch = parse_escape (&p);
131 if (ch == 0)
132 break; /* C loses */
133 else if (ch > 0)
134 *q++ = ch;
135 }
136 else
137 *q++ = ch;
138 }
139#if 0
140 if (*(p - 1) != '\\')
141 *q++ = ' ';
142#endif
143 *q++ = '\0';
144 new = (char *) xrealloc (new, q - new);
145 if (*(char **) c->var != NULL)
b8c9b27d 146 xfree (*(char **) c->var);
d318976c
FN
147 *(char **) c->var = new;
148 }
149 break;
150 case var_string_noescape:
151 if (arg == NULL)
152 arg = "";
153 if (*(char **) c->var != NULL)
b8c9b27d 154 xfree (*(char **) c->var);
d318976c
FN
155 *(char **) c->var = savestring (arg, strlen (arg));
156 break;
157 case var_filename:
158 if (arg == NULL)
159 error_no_arg ("filename to set it to.");
160 if (*(char **) c->var != NULL)
b8c9b27d 161 xfree (*(char **) c->var);
d318976c
FN
162 *(char **) c->var = tilde_expand (arg);
163 break;
164 case var_boolean:
165 *(int *) c->var = parse_binary_operation (arg);
166 break;
167 case var_auto_boolean:
7f19b9a2 168 *(enum auto_boolean *) c->var = parse_auto_binary_operation (arg);
d318976c
FN
169 break;
170 case var_uinteger:
171 if (arg == NULL)
172 error_no_arg ("integer to set it to.");
173 *(unsigned int *) c->var = parse_and_eval_long (arg);
174 if (*(unsigned int *) c->var == 0)
175 *(unsigned int *) c->var = UINT_MAX;
176 break;
177 case var_integer:
178 {
179 unsigned int val;
180 if (arg == NULL)
181 error_no_arg ("integer to set it to.");
182 val = parse_and_eval_long (arg);
183 if (val == 0)
184 *(int *) c->var = INT_MAX;
185 else if (val >= INT_MAX)
186 error ("integer %u out of range", val);
187 else
188 *(int *) c->var = val;
189 break;
190 }
191 case var_zinteger:
192 if (arg == NULL)
193 error_no_arg ("integer to set it to.");
194 *(int *) c->var = parse_and_eval_long (arg);
195 break;
196 case var_enum:
197 {
198 int i;
199 int len;
200 int nmatches;
201 const char *match = NULL;
202 char *p;
203
204 /* if no argument was supplied, print an informative error message */
205 if (arg == NULL)
206 {
207 char msg[1024];
208 strcpy (msg, "Requires an argument. Valid arguments are ");
209 for (i = 0; c->enums[i]; i++)
210 {
211 if (i != 0)
212 strcat (msg, ", ");
213 strcat (msg, c->enums[i]);
214 }
215 strcat (msg, ".");
306d9ac5 216 error ("%s", msg);
d318976c
FN
217 }
218
219 p = strchr (arg, ' ');
220
221 if (p)
222 len = p - arg;
223 else
224 len = strlen (arg);
225
226 nmatches = 0;
227 for (i = 0; c->enums[i]; i++)
228 if (strncmp (arg, c->enums[i], len) == 0)
229 {
230 if (c->enums[i][len] == '\0')
231 {
232 match = c->enums[i];
233 nmatches = 1;
234 break; /* exact match. */
235 }
236 else
237 {
238 match = c->enums[i];
239 nmatches++;
240 }
241 }
242
243 if (nmatches <= 0)
244 error ("Undefined item: \"%s\".", arg);
245
246 if (nmatches > 1)
247 error ("Ambiguous item \"%s\".", arg);
248
249 *(const char **) c->var = match;
250 }
251 break;
252 default:
253 error ("gdb internal error: bad var_type in do_setshow_command");
254 }
255 }
256 else if (c->type == show_cmd)
257 {
d318976c
FN
258 struct cleanup *old_chain;
259 struct ui_stream *stb;
260 int quote;
261
262 stb = ui_out_stream_new (uiout);
263 old_chain = make_cleanup_ui_out_stream_delete (stb);
d318976c 264
552c04a7
TT
265 /* Possibly call the pre hook. */
266 if (c->pre_show_hook)
267 (c->pre_show_hook) (c);
268
d318976c
FN
269 /* Print doc minus "show" at start. */
270 print_doc_line (gdb_stdout, c->doc + 5);
271
d318976c
FN
272 ui_out_text (uiout, " is ");
273 ui_out_wrap_hint (uiout, " ");
274 quote = 0;
275 switch (c->var_type)
276 {
277 case var_string:
278 {
279 unsigned char *p;
280
281 if (*(unsigned char **) c->var)
282 fputstr_filtered (*(unsigned char **) c->var, '"', stb->stream);
283 quote = 1;
284 }
285 break;
286 case var_string_noescape:
287 case var_filename:
288 case var_enum:
289 if (*(char **) c->var)
290 fputs_filtered (*(char **) c->var, stb->stream);
291 quote = 1;
292 break;
293 case var_boolean:
294 fputs_filtered (*(int *) c->var ? "on" : "off", stb->stream);
295 break;
296 case var_auto_boolean:
7f19b9a2 297 switch (*(enum auto_boolean*) c->var)
d318976c 298 {
7f19b9a2 299 case AUTO_BOOLEAN_TRUE:
d318976c
FN
300 fputs_filtered ("on", stb->stream);
301 break;
7f19b9a2 302 case AUTO_BOOLEAN_FALSE:
d318976c
FN
303 fputs_filtered ("off", stb->stream);
304 break;
7f19b9a2 305 case AUTO_BOOLEAN_AUTO:
d318976c
FN
306 fputs_filtered ("auto", stb->stream);
307 break;
308 default:
8e65ff28
AC
309 internal_error (__FILE__, __LINE__,
310 "do_setshow_command: invalid var_auto_boolean");
d318976c
FN
311 break;
312 }
313 break;
314 case var_uinteger:
315 if (*(unsigned int *) c->var == UINT_MAX)
316 {
317 fputs_filtered ("unlimited", stb->stream);
318 break;
319 }
320 /* else fall through */
321 case var_zinteger:
322 fprintf_filtered (stb->stream, "%u", *(unsigned int *) c->var);
323 break;
324 case var_integer:
325 if (*(int *) c->var == INT_MAX)
326 {
327 fputs_filtered ("unlimited", stb->stream);
328 }
329 else
330 fprintf_filtered (stb->stream, "%d", *(int *) c->var);
331 break;
332
333 default:
334 error ("gdb internal error: bad var_type in do_setshow_command");
335 }
336 if (quote)
337 ui_out_text (uiout, "\"");
338 ui_out_field_stream (uiout, "value", stb);
339 if (quote)
340 ui_out_text (uiout, "\"");
341 ui_out_text (uiout, ".\n");
342 do_cleanups (old_chain);
d318976c
FN
343 }
344 else
345 error ("gdb internal error: bad cmd_type in do_setshow_command");
9f60d481 346 c->func (c, NULL, from_tty);
d318976c
FN
347 if (c->type == set_cmd && set_hook)
348 set_hook (c);
349}
350
351/* Show all the settings in a list of show commands. */
352
353void
354cmd_show_list (struct cmd_list_element *list, int from_tty, char *prefix)
355{
3b31d625
EZ
356 struct cleanup *showlist_chain;
357
358 showlist_chain = make_cleanup_ui_out_tuple_begin_end (uiout, "showlist");
d318976c
FN
359 for (; list != NULL; list = list->next)
360 {
361 /* If we find a prefix, run its list, prefixing our output by its
362 prefix (with "show " skipped). */
d318976c
FN
363 if (list->prefixlist && !list->abbrev_flag)
364 {
3b31d625
EZ
365 struct cleanup *optionlist_chain
366 = make_cleanup_ui_out_tuple_begin_end (uiout, "optionlist");
d318976c
FN
367 ui_out_field_string (uiout, "prefix", list->prefixname + 5);
368 cmd_show_list (*list->prefixlist, from_tty, list->prefixname + 5);
3b31d625
EZ
369 /* Close the tuple. */
370 do_cleanups (optionlist_chain);
d318976c
FN
371 }
372 if (list->type == show_cmd)
373 {
3b31d625
EZ
374 struct cleanup *option_chain
375 = make_cleanup_ui_out_tuple_begin_end (uiout, "option");
d318976c
FN
376 ui_out_text (uiout, prefix);
377 ui_out_field_string (uiout, "name", list->name);
378 ui_out_text (uiout, ": ");
379 do_setshow_command ((char *) NULL, from_tty, list);
3b31d625
EZ
380 /* Close the tuple. */
381 do_cleanups (option_chain);
d318976c 382 }
d318976c 383 }
3b31d625
EZ
384 /* Close the tuple. */
385 do_cleanups (showlist_chain);
d318976c
FN
386}
387
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