Commit | Line | Data |
---|---|---|
d318976c | 1 | /* GDB CLI command scripting. |
8926118c | 2 | |
6aba47ca | 3 | Copyright (c) 1986, 1987, 1988, 1989, 1990, 1991, 1992, 1993, 1994, 1995, |
9b254dd1 | 4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008 |
698ba934 | 5 | Free Software Foundation, Inc. |
d318976c FN |
6 | |
7 | This file is part of GDB. | |
8 | ||
9 | This program is free software; you can redistribute it and/or modify | |
10 | it under the terms of the GNU General Public License as published by | |
a9762ec7 | 11 | the Free Software Foundation; either version 3 of the License, or |
d318976c FN |
12 | (at your option) any later version. |
13 | ||
14 | This program is distributed in the hope that it will be useful, | |
15 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
16 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
17 | GNU General Public License for more details. | |
18 | ||
19 | You should have received a copy of the GNU General Public License | |
a9762ec7 | 20 | along with this program. If not, see <http://www.gnu.org/licenses/>. */ |
d318976c FN |
21 | |
22 | #include "defs.h" | |
23 | #include "value.h" | |
24 | #include "language.h" /* For value_true */ | |
25 | #include <ctype.h> | |
26 | ||
d318976c | 27 | #include "ui-out.h" |
5f8a3188 | 28 | #include "gdb_string.h" |
17d92a02 | 29 | #include "exceptions.h" |
d318976c | 30 | #include "top.h" |
40c03ae8 | 31 | #include "breakpoint.h" |
d318976c FN |
32 | #include "cli/cli-cmds.h" |
33 | #include "cli/cli-decode.h" | |
34 | #include "cli/cli-script.h" | |
c03c782f | 35 | #include "gdb_assert.h" |
d318976c | 36 | |
d318976c FN |
37 | /* Prototypes for local functions */ |
38 | ||
d318976c FN |
39 | static enum command_control_type |
40 | recurse_read_control_structure (struct command_line *current_cmd); | |
41 | ||
42 | static char *insert_args (char *line); | |
43 | ||
44 | static struct cleanup * setup_user_args (char *p); | |
45 | ||
46 | static void validate_comname (char *); | |
47 | ||
16026cd7 | 48 | /* Level of control structure when reading. */ |
d318976c FN |
49 | static int control_level; |
50 | ||
16026cd7 AS |
51 | /* Level of control structure when executing. */ |
52 | static int command_nest_depth = 1; | |
53 | ||
54 | /* This is to prevent certain commands being printed twice. */ | |
55 | static int suppress_next_print_command_trace = 0; | |
56 | ||
d318976c FN |
57 | /* Structure for arguments to user defined functions. */ |
58 | #define MAXUSERARGS 10 | |
59 | struct user_args | |
60 | { | |
61 | struct user_args *next; | |
e28493f2 AS |
62 | /* It is necessary to store a malloced copy of the command line to |
63 | ensure that the arguments are not overwritten before they are used. */ | |
64 | char *command; | |
d318976c FN |
65 | struct |
66 | { | |
67 | char *arg; | |
68 | int len; | |
69 | } | |
70 | a[MAXUSERARGS]; | |
71 | int count; | |
72 | } | |
73 | *user_args; | |
74 | ||
75 | \f | |
76 | /* Allocate, initialize a new command line structure for one of the | |
77 | control commands (if/while). */ | |
78 | ||
79 | static struct command_line * | |
80 | build_command_line (enum command_control_type type, char *args) | |
81 | { | |
82 | struct command_line *cmd; | |
83 | ||
40c03ae8 | 84 | if (args == NULL && (type == if_control || type == while_control)) |
8a3fe4f8 | 85 | error (_("if/while commands require arguments.")); |
c8c12293 | 86 | gdb_assert (args != NULL); |
d318976c FN |
87 | |
88 | cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
89 | cmd->next = NULL; | |
90 | cmd->control_type = type; | |
91 | ||
92 | cmd->body_count = 1; | |
93 | cmd->body_list | |
94 | = (struct command_line **) xmalloc (sizeof (struct command_line *) | |
95 | * cmd->body_count); | |
96 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
c8c12293 | 97 | cmd->line = savestring (args, strlen (args)); |
dd3526aa | 98 | |
d318976c FN |
99 | return cmd; |
100 | } | |
101 | ||
102 | /* Build and return a new command structure for the control commands | |
103 | such as "if" and "while". */ | |
104 | ||
105 | static struct command_line * | |
106 | get_command_line (enum command_control_type type, char *arg) | |
107 | { | |
108 | struct command_line *cmd; | |
109 | struct cleanup *old_chain = NULL; | |
110 | ||
111 | /* Allocate and build a new command line structure. */ | |
112 | cmd = build_command_line (type, arg); | |
113 | ||
114 | old_chain = make_cleanup_free_command_lines (&cmd); | |
115 | ||
116 | /* Read in the body of this command. */ | |
117 | if (recurse_read_control_structure (cmd) == invalid_control) | |
118 | { | |
40c03ae8 | 119 | warning (_("Error reading in canned sequence of commands.")); |
d318976c FN |
120 | do_cleanups (old_chain); |
121 | return NULL; | |
122 | } | |
123 | ||
124 | discard_cleanups (old_chain); | |
125 | return cmd; | |
126 | } | |
127 | ||
128 | /* Recursively print a command (including full control structures). */ | |
8926118c | 129 | |
d318976c FN |
130 | void |
131 | print_command_lines (struct ui_out *uiout, struct command_line *cmd, | |
132 | unsigned int depth) | |
133 | { | |
134 | struct command_line *list; | |
135 | ||
136 | list = cmd; | |
137 | while (list) | |
138 | { | |
139 | ||
140 | if (depth) | |
141 | ui_out_spaces (uiout, 2 * depth); | |
142 | ||
143 | /* A simple command, print it and continue. */ | |
144 | if (list->control_type == simple_control) | |
145 | { | |
146 | ui_out_field_string (uiout, NULL, list->line); | |
147 | ui_out_text (uiout, "\n"); | |
148 | list = list->next; | |
149 | continue; | |
150 | } | |
151 | ||
152 | /* loop_continue to jump to the start of a while loop, print it | |
153 | and continue. */ | |
154 | if (list->control_type == continue_control) | |
155 | { | |
156 | ui_out_field_string (uiout, NULL, "loop_continue"); | |
157 | ui_out_text (uiout, "\n"); | |
158 | list = list->next; | |
159 | continue; | |
160 | } | |
161 | ||
162 | /* loop_break to break out of a while loop, print it and continue. */ | |
163 | if (list->control_type == break_control) | |
164 | { | |
165 | ui_out_field_string (uiout, NULL, "loop_break"); | |
166 | ui_out_text (uiout, "\n"); | |
167 | list = list->next; | |
168 | continue; | |
169 | } | |
170 | ||
171 | /* A while command. Recursively print its subcommands and continue. */ | |
172 | if (list->control_type == while_control) | |
173 | { | |
d318976c FN |
174 | ui_out_field_fmt (uiout, NULL, "while %s", list->line); |
175 | ui_out_text (uiout, "\n"); | |
176 | print_command_lines (uiout, *list->body_list, depth + 1); | |
d318976c FN |
177 | if (depth) |
178 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
179 | ui_out_field_string (uiout, NULL, "end"); |
180 | ui_out_text (uiout, "\n"); | |
d318976c FN |
181 | list = list->next; |
182 | continue; | |
183 | } | |
184 | ||
185 | /* An if command. Recursively print both arms before continueing. */ | |
186 | if (list->control_type == if_control) | |
187 | { | |
d318976c FN |
188 | ui_out_field_fmt (uiout, NULL, "if %s", list->line); |
189 | ui_out_text (uiout, "\n"); | |
190 | /* The true arm. */ | |
191 | print_command_lines (uiout, list->body_list[0], depth + 1); | |
192 | ||
193 | /* Show the false arm if it exists. */ | |
194 | if (list->body_count == 2) | |
195 | { | |
196 | if (depth) | |
197 | ui_out_spaces (uiout, 2 * depth); | |
198 | ui_out_field_string (uiout, NULL, "else"); | |
e6ccd35f | 199 | ui_out_text (uiout, "\n"); |
d318976c FN |
200 | print_command_lines (uiout, list->body_list[1], depth + 1); |
201 | } | |
202 | ||
d318976c FN |
203 | if (depth) |
204 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
205 | ui_out_field_string (uiout, NULL, "end"); |
206 | ui_out_text (uiout, "\n"); | |
d318976c FN |
207 | list = list->next; |
208 | continue; | |
209 | } | |
210 | ||
40c03ae8 EZ |
211 | /* A commands command. Print the breakpoint commands and continue. */ |
212 | if (list->control_type == commands_control) | |
213 | { | |
214 | if (*(list->line)) | |
215 | ui_out_field_fmt (uiout, NULL, "commands %s", list->line); | |
216 | else | |
217 | ui_out_field_string (uiout, NULL, "commands"); | |
218 | ui_out_text (uiout, "\n"); | |
219 | print_command_lines (uiout, *list->body_list, depth + 1); | |
220 | if (depth) | |
221 | ui_out_spaces (uiout, 2 * depth); | |
222 | ui_out_field_string (uiout, NULL, "end"); | |
223 | ui_out_text (uiout, "\n"); | |
224 | list = list->next; | |
225 | continue; | |
226 | } | |
227 | ||
d318976c FN |
228 | /* ignore illegal command type and try next */ |
229 | list = list->next; | |
230 | } /* while (list) */ | |
231 | } | |
d318976c | 232 | |
5913bcb0 AC |
233 | /* Handle pre-post hooks. */ |
234 | ||
b9362cc7 | 235 | static void |
5913bcb0 AC |
236 | clear_hook_in_cleanup (void *data) |
237 | { | |
238 | struct cmd_list_element *c = data; | |
239 | c->hook_in = 0; /* Allow hook to work again once it is complete */ | |
240 | } | |
241 | ||
242 | void | |
243 | execute_cmd_pre_hook (struct cmd_list_element *c) | |
244 | { | |
245 | if ((c->hook_pre) && (!c->hook_in)) | |
246 | { | |
247 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
248 | c->hook_in = 1; /* Prevent recursive hooking */ | |
249 | execute_user_command (c->hook_pre, (char *) 0); | |
250 | do_cleanups (cleanups); | |
251 | } | |
252 | } | |
253 | ||
254 | void | |
255 | execute_cmd_post_hook (struct cmd_list_element *c) | |
256 | { | |
257 | if ((c->hook_post) && (!c->hook_in)) | |
258 | { | |
259 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
260 | c->hook_in = 1; /* Prevent recursive hooking */ | |
261 | execute_user_command (c->hook_post, (char *) 0); | |
262 | do_cleanups (cleanups); | |
263 | } | |
264 | } | |
265 | ||
d318976c | 266 | /* Execute the command in CMD. */ |
b9362cc7 | 267 | static void |
20f01a46 DH |
268 | do_restore_user_call_depth (void * call_depth) |
269 | { | |
270 | int * depth = call_depth; | |
698ba934 DJ |
271 | (*depth)--; |
272 | if ((*depth) == 0) | |
273 | in_user_command = 0; | |
20f01a46 DH |
274 | } |
275 | ||
d318976c FN |
276 | |
277 | void | |
278 | execute_user_command (struct cmd_list_element *c, char *args) | |
279 | { | |
d5b5ac79 | 280 | struct command_line *cmdlines; |
d318976c FN |
281 | struct cleanup *old_chain; |
282 | enum command_control_type ret; | |
20f01a46 DH |
283 | static int user_call_depth = 0; |
284 | extern int max_user_call_depth; | |
d318976c FN |
285 | |
286 | old_chain = setup_user_args (args); | |
287 | ||
288 | cmdlines = c->user_commands; | |
289 | if (cmdlines == 0) | |
290 | /* Null command */ | |
291 | return; | |
292 | ||
20f01a46 | 293 | if (++user_call_depth > max_user_call_depth) |
8a3fe4f8 | 294 | error (_("Max user call depth exceeded -- command aborted.")); |
20f01a46 | 295 | |
698ba934 | 296 | make_cleanup (do_restore_user_call_depth, &user_call_depth); |
20f01a46 | 297 | |
d318976c FN |
298 | /* Set the instream to 0, indicating execution of a |
299 | user-defined function. */ | |
698ba934 | 300 | make_cleanup (do_restore_instream_cleanup, instream); |
d318976c | 301 | instream = (FILE *) 0; |
698ba934 DJ |
302 | |
303 | /* Also set the global in_user_command, so that NULL instream is | |
304 | not confused with Insight. */ | |
305 | in_user_command = 1; | |
306 | ||
8625200f | 307 | command_nest_depth++; |
d318976c FN |
308 | while (cmdlines) |
309 | { | |
310 | ret = execute_control_command (cmdlines); | |
311 | if (ret != simple_control && ret != break_control) | |
312 | { | |
40c03ae8 | 313 | warning (_("Error executing canned sequence of commands.")); |
d318976c FN |
314 | break; |
315 | } | |
316 | cmdlines = cmdlines->next; | |
317 | } | |
8625200f | 318 | command_nest_depth--; |
d318976c FN |
319 | do_cleanups (old_chain); |
320 | } | |
321 | ||
16026cd7 AS |
322 | /* This function is called every time GDB prints a prompt. |
323 | It ensures that errors and the like to not confuse the command tracing. */ | |
324 | ||
325 | void | |
326 | reset_command_nest_depth (void) | |
327 | { | |
328 | command_nest_depth = 1; | |
329 | ||
330 | /* Just in case. */ | |
331 | suppress_next_print_command_trace = 0; | |
332 | } | |
333 | ||
334 | /* Print the command, prefixed with '+' to represent the call depth. | |
335 | This is slightly complicated because this function may be called | |
336 | from execute_command and execute_control_command. Unfortunately | |
337 | execute_command also prints the top level control commands. | |
338 | In these cases execute_command will call execute_control_command | |
339 | via while_command or if_command. Inner levels of 'if' and 'while' | |
340 | are dealt with directly. Therefore we can use these functions | |
341 | to determine whether the command has been printed already or not. */ | |
342 | void | |
343 | print_command_trace (const char *cmd) | |
344 | { | |
345 | int i; | |
346 | ||
347 | if (suppress_next_print_command_trace) | |
348 | { | |
349 | suppress_next_print_command_trace = 0; | |
350 | return; | |
351 | } | |
352 | ||
353 | if (!source_verbose && !trace_commands) | |
354 | return; | |
355 | ||
356 | for (i=0; i < command_nest_depth; i++) | |
357 | printf_filtered ("+"); | |
358 | ||
359 | printf_filtered ("%s\n", cmd); | |
360 | } | |
361 | ||
d318976c FN |
362 | enum command_control_type |
363 | execute_control_command (struct command_line *cmd) | |
364 | { | |
365 | struct expression *expr; | |
366 | struct command_line *current; | |
4d2acc65 | 367 | struct cleanup *old_chain = make_cleanup (null_cleanup, 0); |
f976f6d4 AC |
368 | struct value *val; |
369 | struct value *val_mark; | |
d318976c FN |
370 | int loop; |
371 | enum command_control_type ret; | |
372 | char *new_line; | |
373 | ||
4d2acc65 AC |
374 | /* Start by assuming failure, if a problem is detected, the code |
375 | below will simply "break" out of the switch. */ | |
376 | ret = invalid_control; | |
377 | ||
d318976c FN |
378 | switch (cmd->control_type) |
379 | { | |
380 | case simple_control: | |
381 | /* A simple command, execute it and return. */ | |
382 | new_line = insert_args (cmd->line); | |
383 | if (!new_line) | |
4d2acc65 AC |
384 | break; |
385 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
386 | execute_command (new_line, 0); |
387 | ret = cmd->control_type; | |
388 | break; | |
389 | ||
390 | case continue_control: | |
16026cd7 AS |
391 | print_command_trace ("loop_continue"); |
392 | ||
393 | /* Return for "continue", and "break" so we can either | |
394 | continue the loop at the top, or break out. */ | |
395 | ret = cmd->control_type; | |
396 | break; | |
397 | ||
d318976c | 398 | case break_control: |
16026cd7 AS |
399 | print_command_trace ("loop_break"); |
400 | ||
d318976c FN |
401 | /* Return for "continue", and "break" so we can either |
402 | continue the loop at the top, or break out. */ | |
403 | ret = cmd->control_type; | |
404 | break; | |
405 | ||
406 | case while_control: | |
407 | { | |
16026cd7 AS |
408 | char *buffer = alloca (strlen (cmd->line) + 7); |
409 | sprintf (buffer, "while %s", cmd->line); | |
410 | print_command_trace (buffer); | |
411 | ||
d318976c FN |
412 | /* Parse the loop control expression for the while statement. */ |
413 | new_line = insert_args (cmd->line); | |
414 | if (!new_line) | |
4d2acc65 AC |
415 | break; |
416 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
417 | expr = parse_expression (new_line); |
418 | make_cleanup (free_current_contents, &expr); | |
419 | ||
420 | ret = simple_control; | |
421 | loop = 1; | |
422 | ||
423 | /* Keep iterating so long as the expression is true. */ | |
424 | while (loop == 1) | |
425 | { | |
426 | int cond_result; | |
427 | ||
428 | QUIT; | |
429 | ||
430 | /* Evaluate the expression. */ | |
431 | val_mark = value_mark (); | |
432 | val = evaluate_expression (expr); | |
433 | cond_result = value_true (val); | |
434 | value_free_to_mark (val_mark); | |
435 | ||
436 | /* If the value is false, then break out of the loop. */ | |
437 | if (!cond_result) | |
438 | break; | |
439 | ||
440 | /* Execute the body of the while statement. */ | |
441 | current = *cmd->body_list; | |
442 | while (current) | |
443 | { | |
16026cd7 | 444 | command_nest_depth++; |
d318976c | 445 | ret = execute_control_command (current); |
16026cd7 | 446 | command_nest_depth--; |
d318976c FN |
447 | |
448 | /* If we got an error, or a "break" command, then stop | |
449 | looping. */ | |
450 | if (ret == invalid_control || ret == break_control) | |
451 | { | |
452 | loop = 0; | |
453 | break; | |
454 | } | |
455 | ||
456 | /* If we got a "continue" command, then restart the loop | |
457 | at this point. */ | |
458 | if (ret == continue_control) | |
459 | break; | |
460 | ||
461 | /* Get the next statement. */ | |
462 | current = current->next; | |
463 | } | |
464 | } | |
465 | ||
466 | /* Reset RET so that we don't recurse the break all the way down. */ | |
467 | if (ret == break_control) | |
468 | ret = simple_control; | |
469 | ||
470 | break; | |
471 | } | |
472 | ||
473 | case if_control: | |
474 | { | |
16026cd7 AS |
475 | char *buffer = alloca (strlen (cmd->line) + 4); |
476 | sprintf (buffer, "if %s", cmd->line); | |
477 | print_command_trace (buffer); | |
478 | ||
d318976c FN |
479 | new_line = insert_args (cmd->line); |
480 | if (!new_line) | |
4d2acc65 AC |
481 | break; |
482 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
483 | /* Parse the conditional for the if statement. */ |
484 | expr = parse_expression (new_line); | |
485 | make_cleanup (free_current_contents, &expr); | |
486 | ||
487 | current = NULL; | |
488 | ret = simple_control; | |
489 | ||
490 | /* Evaluate the conditional. */ | |
491 | val_mark = value_mark (); | |
492 | val = evaluate_expression (expr); | |
493 | ||
494 | /* Choose which arm to take commands from based on the value of the | |
495 | conditional expression. */ | |
496 | if (value_true (val)) | |
497 | current = *cmd->body_list; | |
498 | else if (cmd->body_count == 2) | |
499 | current = *(cmd->body_list + 1); | |
500 | value_free_to_mark (val_mark); | |
501 | ||
502 | /* Execute commands in the given arm. */ | |
503 | while (current) | |
504 | { | |
16026cd7 | 505 | command_nest_depth++; |
d318976c | 506 | ret = execute_control_command (current); |
16026cd7 | 507 | command_nest_depth--; |
d318976c FN |
508 | |
509 | /* If we got an error, get out. */ | |
510 | if (ret != simple_control) | |
511 | break; | |
512 | ||
513 | /* Get the next statement in the body. */ | |
514 | current = current->next; | |
515 | } | |
516 | ||
517 | break; | |
518 | } | |
40c03ae8 EZ |
519 | case commands_control: |
520 | { | |
521 | /* Breakpoint commands list, record the commands in the breakpoint's | |
522 | command list and return. */ | |
523 | new_line = insert_args (cmd->line); | |
524 | if (!new_line) | |
525 | break; | |
526 | make_cleanup (free_current_contents, &new_line); | |
527 | ret = commands_from_control_command (new_line, cmd); | |
528 | break; | |
529 | } | |
d318976c FN |
530 | |
531 | default: | |
40c03ae8 | 532 | warning (_("Invalid control type in canned commands structure.")); |
4d2acc65 | 533 | break; |
d318976c FN |
534 | } |
535 | ||
4d2acc65 | 536 | do_cleanups (old_chain); |
d318976c FN |
537 | |
538 | return ret; | |
539 | } | |
540 | ||
541 | /* "while" command support. Executes a body of statements while the | |
542 | loop condition is nonzero. */ | |
543 | ||
544 | void | |
545 | while_command (char *arg, int from_tty) | |
546 | { | |
547 | struct command_line *command = NULL; | |
548 | ||
549 | control_level = 1; | |
550 | command = get_command_line (while_control, arg); | |
551 | ||
552 | if (command == NULL) | |
553 | return; | |
554 | ||
16026cd7 | 555 | suppress_next_print_command_trace = 1; |
d318976c FN |
556 | execute_control_command (command); |
557 | free_command_lines (&command); | |
558 | } | |
559 | ||
560 | /* "if" command support. Execute either the true or false arm depending | |
561 | on the value of the if conditional. */ | |
562 | ||
563 | void | |
564 | if_command (char *arg, int from_tty) | |
565 | { | |
566 | struct command_line *command = NULL; | |
567 | ||
568 | control_level = 1; | |
569 | command = get_command_line (if_control, arg); | |
570 | ||
571 | if (command == NULL) | |
572 | return; | |
573 | ||
16026cd7 | 574 | suppress_next_print_command_trace = 1; |
d318976c FN |
575 | execute_control_command (command); |
576 | free_command_lines (&command); | |
577 | } | |
578 | ||
579 | /* Cleanup */ | |
580 | static void | |
581 | arg_cleanup (void *ignore) | |
582 | { | |
583 | struct user_args *oargs = user_args; | |
584 | if (!user_args) | |
8e65ff28 | 585 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 586 | _("arg_cleanup called with no user args.\n")); |
d318976c FN |
587 | |
588 | user_args = user_args->next; | |
e28493f2 | 589 | xfree (oargs->command); |
b8c9b27d | 590 | xfree (oargs); |
d318976c FN |
591 | } |
592 | ||
593 | /* Bind the incomming arguments for a user defined command to | |
594 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
595 | ||
596 | static struct cleanup * | |
597 | setup_user_args (char *p) | |
598 | { | |
599 | struct user_args *args; | |
600 | struct cleanup *old_chain; | |
601 | unsigned int arg_count = 0; | |
602 | ||
603 | args = (struct user_args *) xmalloc (sizeof (struct user_args)); | |
604 | memset (args, 0, sizeof (struct user_args)); | |
605 | ||
606 | args->next = user_args; | |
607 | user_args = args; | |
608 | ||
609 | old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); | |
610 | ||
611 | if (p == NULL) | |
612 | return old_chain; | |
613 | ||
e28493f2 AS |
614 | user_args->command = p = xstrdup (p); |
615 | ||
d318976c FN |
616 | while (*p) |
617 | { | |
618 | char *start_arg; | |
619 | int squote = 0; | |
620 | int dquote = 0; | |
621 | int bsquote = 0; | |
622 | ||
623 | if (arg_count >= MAXUSERARGS) | |
624 | { | |
8a3fe4f8 | 625 | error (_("user defined function may only have %d arguments."), |
d318976c FN |
626 | MAXUSERARGS); |
627 | return old_chain; | |
628 | } | |
629 | ||
630 | /* Strip whitespace. */ | |
631 | while (*p == ' ' || *p == '\t') | |
632 | p++; | |
633 | ||
634 | /* P now points to an argument. */ | |
635 | start_arg = p; | |
636 | user_args->a[arg_count].arg = p; | |
637 | ||
638 | /* Get to the end of this argument. */ | |
639 | while (*p) | |
640 | { | |
641 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
642 | break; | |
643 | else | |
644 | { | |
645 | if (bsquote) | |
646 | bsquote = 0; | |
647 | else if (*p == '\\') | |
648 | bsquote = 1; | |
649 | else if (squote) | |
650 | { | |
651 | if (*p == '\'') | |
652 | squote = 0; | |
653 | } | |
654 | else if (dquote) | |
655 | { | |
656 | if (*p == '"') | |
657 | dquote = 0; | |
658 | } | |
659 | else | |
660 | { | |
661 | if (*p == '\'') | |
662 | squote = 1; | |
663 | else if (*p == '"') | |
664 | dquote = 1; | |
665 | } | |
666 | p++; | |
667 | } | |
668 | } | |
669 | ||
670 | user_args->a[arg_count].len = p - start_arg; | |
671 | arg_count++; | |
672 | user_args->count++; | |
673 | } | |
674 | return old_chain; | |
675 | } | |
676 | ||
677 | /* Given character string P, return a point to the first argument ($arg), | |
678 | or NULL if P contains no arguments. */ | |
679 | ||
680 | static char * | |
681 | locate_arg (char *p) | |
682 | { | |
683 | while ((p = strchr (p, '$'))) | |
684 | { | |
c03c782f AS |
685 | if (strncmp (p, "$arg", 4) == 0 |
686 | && (isdigit (p[4]) || p[4] == 'c')) | |
d318976c FN |
687 | return p; |
688 | p++; | |
689 | } | |
690 | return NULL; | |
691 | } | |
692 | ||
693 | /* Insert the user defined arguments stored in user_arg into the $arg | |
694 | arguments found in line, with the updated copy being placed into nline. */ | |
695 | ||
696 | static char * | |
697 | insert_args (char *line) | |
698 | { | |
699 | char *p, *save_line, *new_line; | |
700 | unsigned len, i; | |
701 | ||
61d9b92f DJ |
702 | /* If we are not in a user-defined function, treat $argc, $arg0, et |
703 | cetera as normal convenience variables. */ | |
704 | if (user_args == NULL) | |
705 | return xstrdup (line); | |
706 | ||
d318976c FN |
707 | /* First we need to know how much memory to allocate for the new line. */ |
708 | save_line = line; | |
709 | len = 0; | |
710 | while ((p = locate_arg (line))) | |
711 | { | |
712 | len += p - line; | |
713 | i = p[4] - '0'; | |
714 | ||
c03c782f AS |
715 | if (p[4] == 'c') |
716 | { | |
717 | /* $argc. Number will be <=10. */ | |
718 | len += user_args->count == 10 ? 2 : 1; | |
719 | } | |
720 | else if (i >= user_args->count) | |
d318976c | 721 | { |
8a3fe4f8 | 722 | error (_("Missing argument %d in user function."), i); |
d318976c FN |
723 | return NULL; |
724 | } | |
c03c782f AS |
725 | else |
726 | { | |
727 | len += user_args->a[i].len; | |
728 | } | |
d318976c FN |
729 | line = p + 5; |
730 | } | |
731 | ||
732 | /* Don't forget the tail. */ | |
733 | len += strlen (line); | |
734 | ||
735 | /* Allocate space for the new line and fill it in. */ | |
736 | new_line = (char *) xmalloc (len + 1); | |
737 | if (new_line == NULL) | |
738 | return NULL; | |
739 | ||
740 | /* Restore pointer to beginning of old line. */ | |
741 | line = save_line; | |
742 | ||
743 | /* Save pointer to beginning of new line. */ | |
744 | save_line = new_line; | |
745 | ||
746 | while ((p = locate_arg (line))) | |
747 | { | |
748 | int i, len; | |
749 | ||
750 | memcpy (new_line, line, p - line); | |
751 | new_line += p - line; | |
d318976c | 752 | |
c03c782f AS |
753 | if (p[4] == 'c') |
754 | { | |
755 | gdb_assert (user_args->count >= 0 && user_args->count <= 10); | |
756 | if (user_args->count == 10) | |
757 | { | |
758 | *(new_line++) = '1'; | |
759 | *(new_line++) = '0'; | |
760 | } | |
761 | else | |
762 | *(new_line++) = user_args->count + '0'; | |
763 | } | |
764 | else | |
d318976c | 765 | { |
c03c782f AS |
766 | i = p[4] - '0'; |
767 | len = user_args->a[i].len; | |
768 | if (len) | |
769 | { | |
770 | memcpy (new_line, user_args->a[i].arg, len); | |
771 | new_line += len; | |
772 | } | |
d318976c FN |
773 | } |
774 | line = p + 5; | |
775 | } | |
776 | /* Don't forget the tail. */ | |
777 | strcpy (new_line, line); | |
778 | ||
779 | /* Return a pointer to the beginning of the new line. */ | |
780 | return save_line; | |
781 | } | |
782 | ||
783 | \f | |
784 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
785 | code bodies. This is typically used when we encounter an "else" | |
786 | clause for an "if" command. */ | |
787 | ||
788 | static void | |
789 | realloc_body_list (struct command_line *command, int new_length) | |
790 | { | |
791 | int n; | |
792 | struct command_line **body_list; | |
793 | ||
794 | n = command->body_count; | |
795 | ||
796 | /* Nothing to do? */ | |
797 | if (new_length <= n) | |
798 | return; | |
799 | ||
800 | body_list = (struct command_line **) | |
801 | xmalloc (sizeof (struct command_line *) * new_length); | |
802 | ||
803 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
42b575e5 | 804 | memset (body_list + n, 0, sizeof (struct command_line *) * (new_length - n)); |
d318976c | 805 | |
b8c9b27d | 806 | xfree (command->body_list); |
d318976c FN |
807 | command->body_list = body_list; |
808 | command->body_count = new_length; | |
809 | } | |
810 | ||
811 | /* Read one line from the input stream. If the command is an "else" or | |
812 | "end", return such an indication to the caller. */ | |
813 | ||
814 | static enum misc_command_type | |
815 | read_next_line (struct command_line **command) | |
816 | { | |
817 | char *p, *p1, *prompt_ptr, control_prompt[256]; | |
818 | int i = 0; | |
819 | ||
820 | if (control_level >= 254) | |
8a3fe4f8 | 821 | error (_("Control nesting too deep!")); |
d318976c FN |
822 | |
823 | /* Set a prompt based on the nesting of the control commands. */ | |
9a4105ab | 824 | if (instream == stdin || (instream == 0 && deprecated_readline_hook != NULL)) |
d318976c FN |
825 | { |
826 | for (i = 0; i < control_level; i++) | |
827 | control_prompt[i] = ' '; | |
828 | control_prompt[i] = '>'; | |
829 | control_prompt[i + 1] = '\0'; | |
830 | prompt_ptr = (char *) &control_prompt[0]; | |
831 | } | |
832 | else | |
833 | prompt_ptr = NULL; | |
834 | ||
835 | p = command_line_input (prompt_ptr, instream == stdin, "commands"); | |
836 | ||
837 | /* Not sure what to do here. */ | |
838 | if (p == NULL) | |
839 | return end_command; | |
840 | ||
841 | /* Strip leading and trailing whitespace. */ | |
842 | while (*p == ' ' || *p == '\t') | |
843 | p++; | |
844 | ||
845 | p1 = p + strlen (p); | |
846 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) | |
847 | p1--; | |
848 | ||
849 | /* Blanks and comments don't really do anything, but we need to | |
850 | distinguish them from else, end and other commands which can be | |
851 | executed. */ | |
852 | if (p1 == p || p[0] == '#') | |
853 | return nop_command; | |
854 | ||
855 | /* Is this the end of a simple, while, or if control structure? */ | |
856 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
857 | return end_command; | |
858 | ||
859 | /* Is the else clause of an if control structure? */ | |
860 | if (p1 - p == 4 && !strncmp (p, "else", 4)) | |
861 | return else_command; | |
862 | ||
863 | /* Check for while, if, break, continue, etc and build a new command | |
864 | line structure for them. */ | |
865 | if (p1 - p > 5 && !strncmp (p, "while", 5)) | |
33f2d567 JM |
866 | { |
867 | char *first_arg; | |
868 | first_arg = p + 5; | |
869 | while (first_arg < p1 && isspace (*first_arg)) | |
870 | first_arg++; | |
871 | *command = build_command_line (while_control, first_arg); | |
872 | } | |
d318976c | 873 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) |
33f2d567 JM |
874 | { |
875 | char *first_arg; | |
876 | first_arg = p + 2; | |
877 | while (first_arg < p1 && isspace (*first_arg)) | |
878 | first_arg++; | |
879 | *command = build_command_line (if_control, first_arg); | |
880 | } | |
40c03ae8 EZ |
881 | else if (p1 - p >= 8 && !strncmp (p, "commands", 8)) |
882 | { | |
883 | char *first_arg; | |
884 | first_arg = p + 8; | |
885 | while (first_arg < p1 && isspace (*first_arg)) | |
886 | first_arg++; | |
887 | *command = build_command_line (commands_control, first_arg); | |
888 | } | |
d318976c FN |
889 | else if (p1 - p == 10 && !strncmp (p, "loop_break", 10)) |
890 | { | |
891 | *command = (struct command_line *) | |
892 | xmalloc (sizeof (struct command_line)); | |
893 | (*command)->next = NULL; | |
894 | (*command)->line = NULL; | |
895 | (*command)->control_type = break_control; | |
896 | (*command)->body_count = 0; | |
897 | (*command)->body_list = NULL; | |
898 | } | |
899 | else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13)) | |
900 | { | |
901 | *command = (struct command_line *) | |
902 | xmalloc (sizeof (struct command_line)); | |
903 | (*command)->next = NULL; | |
904 | (*command)->line = NULL; | |
905 | (*command)->control_type = continue_control; | |
906 | (*command)->body_count = 0; | |
907 | (*command)->body_list = NULL; | |
908 | } | |
909 | else | |
910 | { | |
911 | /* A normal command. */ | |
912 | *command = (struct command_line *) | |
913 | xmalloc (sizeof (struct command_line)); | |
914 | (*command)->next = NULL; | |
915 | (*command)->line = savestring (p, p1 - p); | |
916 | (*command)->control_type = simple_control; | |
917 | (*command)->body_count = 0; | |
918 | (*command)->body_list = NULL; | |
919 | } | |
920 | ||
921 | /* Nothing special. */ | |
922 | return ok_command; | |
923 | } | |
924 | ||
925 | /* Recursively read in the control structures and create a command_line | |
926 | structure from them. | |
927 | ||
928 | The parent_control parameter is the control structure in which the | |
929 | following commands are nested. */ | |
930 | ||
931 | static enum command_control_type | |
932 | recurse_read_control_structure (struct command_line *current_cmd) | |
933 | { | |
934 | int current_body, i; | |
935 | enum misc_command_type val; | |
936 | enum command_control_type ret; | |
937 | struct command_line **body_ptr, *child_tail, *next; | |
938 | ||
939 | child_tail = NULL; | |
940 | current_body = 1; | |
941 | ||
942 | /* Sanity checks. */ | |
943 | if (current_cmd->control_type == simple_control) | |
8a3fe4f8 | 944 | error (_("Recursed on a simple control type.")); |
d318976c FN |
945 | |
946 | if (current_body > current_cmd->body_count) | |
8a3fe4f8 | 947 | error (_("Allocated body is smaller than this command type needs.")); |
d318976c FN |
948 | |
949 | /* Read lines from the input stream and build control structures. */ | |
950 | while (1) | |
951 | { | |
952 | dont_repeat (); | |
953 | ||
954 | next = NULL; | |
955 | val = read_next_line (&next); | |
956 | ||
957 | /* Just skip blanks and comments. */ | |
958 | if (val == nop_command) | |
959 | continue; | |
960 | ||
961 | if (val == end_command) | |
962 | { | |
963 | if (current_cmd->control_type == while_control | |
40c03ae8 EZ |
964 | || current_cmd->control_type == if_control |
965 | || current_cmd->control_type == commands_control) | |
d318976c | 966 | { |
40c03ae8 | 967 | /* Success reading an entire canned sequence of commands. */ |
d318976c FN |
968 | ret = simple_control; |
969 | break; | |
970 | } | |
971 | else | |
972 | { | |
973 | ret = invalid_control; | |
974 | break; | |
975 | } | |
976 | } | |
977 | ||
978 | /* Not the end of a control structure. */ | |
979 | if (val == else_command) | |
980 | { | |
981 | if (current_cmd->control_type == if_control | |
982 | && current_body == 1) | |
983 | { | |
984 | realloc_body_list (current_cmd, 2); | |
985 | current_body = 2; | |
986 | child_tail = NULL; | |
987 | continue; | |
988 | } | |
989 | else | |
990 | { | |
991 | ret = invalid_control; | |
992 | break; | |
993 | } | |
994 | } | |
995 | ||
996 | if (child_tail) | |
997 | { | |
998 | child_tail->next = next; | |
999 | } | |
1000 | else | |
1001 | { | |
1002 | body_ptr = current_cmd->body_list; | |
1003 | for (i = 1; i < current_body; i++) | |
1004 | body_ptr++; | |
1005 | ||
1006 | *body_ptr = next; | |
1007 | ||
1008 | } | |
1009 | ||
1010 | child_tail = next; | |
1011 | ||
1012 | /* If the latest line is another control structure, then recurse | |
1013 | on it. */ | |
1014 | if (next->control_type == while_control | |
40c03ae8 EZ |
1015 | || next->control_type == if_control |
1016 | || next->control_type == commands_control) | |
d318976c FN |
1017 | { |
1018 | control_level++; | |
1019 | ret = recurse_read_control_structure (next); | |
1020 | control_level--; | |
1021 | ||
1022 | if (ret != simple_control) | |
1023 | break; | |
1024 | } | |
1025 | } | |
1026 | ||
1027 | dont_repeat (); | |
1028 | ||
1029 | return ret; | |
1030 | } | |
1031 | ||
1032 | /* Read lines from the input stream and accumulate them in a chain of | |
1033 | struct command_line's, which is then returned. For input from a | |
1034 | terminal, the special command "end" is used to mark the end of the | |
1035 | input, and is not included in the returned chain of commands. */ | |
1036 | ||
1037 | #define END_MESSAGE "End with a line saying just \"end\"." | |
1038 | ||
1039 | struct command_line * | |
1040 | read_command_lines (char *prompt_arg, int from_tty) | |
1041 | { | |
1042 | struct command_line *head, *tail, *next; | |
1043 | struct cleanup *old_chain; | |
1044 | enum command_control_type ret; | |
1045 | enum misc_command_type val; | |
1046 | ||
1047 | control_level = 0; | |
698ba934 DJ |
1048 | |
1049 | if (from_tty && input_from_terminal_p ()) | |
d318976c | 1050 | { |
698ba934 DJ |
1051 | if (deprecated_readline_begin_hook) |
1052 | { | |
1053 | /* Note - intentional to merge messages with no newline */ | |
1054 | (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); | |
1055 | } | |
1056 | else | |
1057 | { | |
1058 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
1059 | gdb_flush (gdb_stdout); | |
1060 | } | |
d318976c FN |
1061 | } |
1062 | ||
1063 | head = tail = NULL; | |
1064 | old_chain = NULL; | |
1065 | ||
1066 | while (1) | |
1067 | { | |
f429d7d0 | 1068 | dont_repeat (); |
d318976c FN |
1069 | val = read_next_line (&next); |
1070 | ||
1071 | /* Ignore blank lines or comments. */ | |
1072 | if (val == nop_command) | |
1073 | continue; | |
1074 | ||
1075 | if (val == end_command) | |
1076 | { | |
1077 | ret = simple_control; | |
1078 | break; | |
1079 | } | |
1080 | ||
1081 | if (val != ok_command) | |
1082 | { | |
1083 | ret = invalid_control; | |
1084 | break; | |
1085 | } | |
1086 | ||
1087 | if (next->control_type == while_control | |
40c03ae8 EZ |
1088 | || next->control_type == if_control |
1089 | || next->control_type == commands_control) | |
d318976c FN |
1090 | { |
1091 | control_level++; | |
1092 | ret = recurse_read_control_structure (next); | |
1093 | control_level--; | |
1094 | ||
1095 | if (ret == invalid_control) | |
1096 | break; | |
1097 | } | |
1098 | ||
1099 | if (tail) | |
1100 | { | |
1101 | tail->next = next; | |
1102 | } | |
1103 | else | |
1104 | { | |
1105 | head = next; | |
1106 | old_chain = make_cleanup_free_command_lines (&head); | |
1107 | } | |
1108 | tail = next; | |
1109 | } | |
1110 | ||
1111 | dont_repeat (); | |
1112 | ||
1113 | if (head) | |
1114 | { | |
1115 | if (ret != invalid_control) | |
1116 | { | |
1117 | discard_cleanups (old_chain); | |
1118 | } | |
1119 | else | |
1120 | do_cleanups (old_chain); | |
1121 | } | |
1122 | ||
698ba934 | 1123 | if (deprecated_readline_end_hook && from_tty && input_from_terminal_p ()) |
d318976c | 1124 | { |
9a4105ab | 1125 | (*deprecated_readline_end_hook) (); |
d318976c FN |
1126 | } |
1127 | return (head); | |
1128 | } | |
1129 | ||
1130 | /* Free a chain of struct command_line's. */ | |
1131 | ||
1132 | void | |
1133 | free_command_lines (struct command_line **lptr) | |
1134 | { | |
d5b5ac79 AC |
1135 | struct command_line *l = *lptr; |
1136 | struct command_line *next; | |
d318976c FN |
1137 | struct command_line **blist; |
1138 | int i; | |
1139 | ||
1140 | while (l) | |
1141 | { | |
1142 | if (l->body_count > 0) | |
1143 | { | |
1144 | blist = l->body_list; | |
1145 | for (i = 0; i < l->body_count; i++, blist++) | |
1146 | free_command_lines (blist); | |
1147 | } | |
1148 | next = l->next; | |
b8c9b27d KB |
1149 | xfree (l->line); |
1150 | xfree (l); | |
d318976c FN |
1151 | l = next; |
1152 | } | |
0d70f41b | 1153 | *lptr = NULL; |
d318976c FN |
1154 | } |
1155 | ||
1156 | static void | |
1157 | do_free_command_lines_cleanup (void *arg) | |
1158 | { | |
1159 | free_command_lines (arg); | |
1160 | } | |
1161 | ||
6c50ab1c | 1162 | struct cleanup * |
d318976c FN |
1163 | make_cleanup_free_command_lines (struct command_line **arg) |
1164 | { | |
1165 | return make_cleanup (do_free_command_lines_cleanup, arg); | |
1166 | } | |
c2b8ed2c MS |
1167 | |
1168 | struct command_line * | |
1169 | copy_command_lines (struct command_line *cmds) | |
1170 | { | |
1171 | struct command_line *result = NULL; | |
1172 | ||
1173 | if (cmds) | |
1174 | { | |
1175 | result = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1176 | ||
1177 | result->next = copy_command_lines (cmds->next); | |
1178 | result->line = xstrdup (cmds->line); | |
1179 | result->control_type = cmds->control_type; | |
1180 | result->body_count = cmds->body_count; | |
1181 | if (cmds->body_count > 0) | |
1182 | { | |
1183 | int i; | |
1184 | ||
1185 | result->body_list = (struct command_line **) | |
1186 | xmalloc (sizeof (struct command_line *) * cmds->body_count); | |
1187 | ||
1188 | for (i = 0; i < cmds->body_count; i++) | |
1189 | result->body_list[i] = copy_command_lines (cmds->body_list[i]); | |
1190 | } | |
1191 | else | |
1192 | result->body_list = NULL; | |
1193 | } | |
1194 | ||
1195 | return result; | |
1196 | } | |
d318976c FN |
1197 | \f |
1198 | static void | |
1199 | validate_comname (char *comname) | |
1200 | { | |
d5b5ac79 | 1201 | char *p; |
d318976c FN |
1202 | |
1203 | if (comname == 0) | |
e2e0b3e5 | 1204 | error_no_arg (_("name of command to define")); |
d318976c FN |
1205 | |
1206 | p = comname; | |
1207 | while (*p) | |
1208 | { | |
1209 | if (!isalnum (*p) && *p != '-' && *p != '_') | |
8a3fe4f8 | 1210 | error (_("Junk in argument list: \"%s\""), p); |
d318976c FN |
1211 | p++; |
1212 | } | |
1213 | } | |
1214 | ||
1215 | /* This is just a placeholder in the command data structures. */ | |
1216 | static void | |
1217 | user_defined_command (char *ignore, int from_tty) | |
1218 | { | |
1219 | } | |
1220 | ||
1221 | void | |
1222 | define_command (char *comname, int from_tty) | |
1223 | { | |
1224 | #define MAX_TMPBUF 128 | |
1225 | enum cmd_hook_type | |
1226 | { | |
1227 | CMD_NO_HOOK = 0, | |
1228 | CMD_PRE_HOOK, | |
1229 | CMD_POST_HOOK | |
1230 | }; | |
d5b5ac79 AC |
1231 | struct command_line *cmds; |
1232 | struct cmd_list_element *c, *newc, *oldc, *hookc = 0; | |
d318976c FN |
1233 | char *tem = comname; |
1234 | char *tem2; | |
1235 | char tmpbuf[MAX_TMPBUF]; | |
1236 | int hook_type = CMD_NO_HOOK; | |
1237 | int hook_name_size = 0; | |
1238 | ||
1239 | #define HOOK_STRING "hook-" | |
1240 | #define HOOK_LEN 5 | |
1241 | #define HOOK_POST_STRING "hookpost-" | |
1242 | #define HOOK_POST_LEN 9 | |
1243 | ||
1244 | validate_comname (comname); | |
1245 | ||
1246 | /* Look it up, and verify that we got an exact match. */ | |
1247 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
5cb316ef | 1248 | if (c && strcmp (comname, c->name) != 0) |
d318976c FN |
1249 | c = 0; |
1250 | ||
1251 | if (c) | |
1252 | { | |
ab4e3d93 | 1253 | int q; |
d318976c | 1254 | if (c->class == class_user || c->class == class_alias) |
e2e0b3e5 | 1255 | q = query (_("Redefine command \"%s\"? "), c->name); |
d318976c | 1256 | else |
e2e0b3e5 | 1257 | q = query (_("Really redefine built-in command \"%s\"? "), c->name); |
ab4e3d93 | 1258 | if (!q) |
8a3fe4f8 | 1259 | error (_("Command \"%s\" not redefined."), c->name); |
d318976c FN |
1260 | } |
1261 | ||
1262 | /* If this new command is a hook, then mark the command which it | |
1263 | is hooking. Note that we allow hooking `help' commands, so that | |
1264 | we can hook the `stop' pseudo-command. */ | |
1265 | ||
1266 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
1267 | { | |
1268 | hook_type = CMD_PRE_HOOK; | |
1269 | hook_name_size = HOOK_LEN; | |
1270 | } | |
1271 | else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) | |
1272 | { | |
1273 | hook_type = CMD_POST_HOOK; | |
1274 | hook_name_size = HOOK_POST_LEN; | |
1275 | } | |
1276 | ||
1277 | if (hook_type != CMD_NO_HOOK) | |
1278 | { | |
1279 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
1280 | tem = comname + hook_name_size; | |
1281 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); | |
5cb316ef | 1282 | if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0) |
d318976c FN |
1283 | hookc = 0; |
1284 | if (!hookc) | |
1285 | { | |
8a3fe4f8 | 1286 | warning (_("Your new `%s' command does not hook any existing command."), |
d318976c FN |
1287 | comname); |
1288 | if (!query ("Proceed? ")) | |
8a3fe4f8 | 1289 | error (_("Not confirmed.")); |
d318976c FN |
1290 | } |
1291 | } | |
1292 | ||
1293 | comname = savestring (comname, strlen (comname)); | |
1294 | ||
1295 | /* If the rest of the commands will be case insensitive, this one | |
1296 | should behave in the same manner. */ | |
1297 | for (tem = comname; *tem; tem++) | |
1298 | if (isupper (*tem)) | |
1299 | *tem = tolower (*tem); | |
1300 | ||
1301 | sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname); | |
1302 | cmds = read_command_lines (tmpbuf, from_tty); | |
1303 | ||
1304 | if (c && c->class == class_user) | |
1305 | free_command_lines (&c->user_commands); | |
1306 | ||
1307 | newc = add_cmd (comname, class_user, user_defined_command, | |
1308 | (c && c->class == class_user) | |
1309 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
1310 | newc->user_commands = cmds; | |
1311 | ||
1312 | /* If this new command is a hook, then mark both commands as being | |
1313 | tied. */ | |
1314 | if (hookc) | |
1315 | { | |
1316 | switch (hook_type) | |
1317 | { | |
1318 | case CMD_PRE_HOOK: | |
1319 | hookc->hook_pre = newc; /* Target gets hooked. */ | |
1320 | newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ | |
1321 | break; | |
1322 | case CMD_POST_HOOK: | |
f48ff60a FN |
1323 | hookc->hook_post = newc; /* Target gets hooked. */ |
1324 | newc->hookee_post = hookc; /* We are marked as hooking target cmd. */ | |
d318976c FN |
1325 | break; |
1326 | default: | |
1327 | /* Should never come here as hookc would be 0. */ | |
e2e0b3e5 | 1328 | internal_error (__FILE__, __LINE__, _("bad switch")); |
d318976c FN |
1329 | } |
1330 | } | |
1331 | } | |
1332 | ||
1333 | void | |
1334 | document_command (char *comname, int from_tty) | |
1335 | { | |
1336 | struct command_line *doclines; | |
d5b5ac79 | 1337 | struct cmd_list_element *c; |
d318976c FN |
1338 | char *tem = comname; |
1339 | char tmpbuf[128]; | |
1340 | ||
1341 | validate_comname (comname); | |
1342 | ||
1343 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1344 | ||
1345 | if (c->class != class_user) | |
8a3fe4f8 | 1346 | error (_("Command \"%s\" is built-in."), comname); |
d318976c FN |
1347 | |
1348 | sprintf (tmpbuf, "Type documentation for \"%s\".", comname); | |
1349 | doclines = read_command_lines (tmpbuf, from_tty); | |
1350 | ||
1351 | if (c->doc) | |
b8c9b27d | 1352 | xfree (c->doc); |
d318976c FN |
1353 | |
1354 | { | |
d5b5ac79 AC |
1355 | struct command_line *cl1; |
1356 | int len = 0; | |
d318976c FN |
1357 | |
1358 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1359 | len += strlen (cl1->line) + 1; | |
1360 | ||
1361 | c->doc = (char *) xmalloc (len + 1); | |
1362 | *c->doc = 0; | |
1363 | ||
1364 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1365 | { | |
1366 | strcat (c->doc, cl1->line); | |
1367 | if (cl1->next) | |
1368 | strcat (c->doc, "\n"); | |
1369 | } | |
1370 | } | |
1371 | ||
1372 | free_command_lines (&doclines); | |
1373 | } | |
1374 | \f | |
1375 | struct source_cleanup_lines_args | |
1376 | { | |
1377 | int old_line; | |
1378 | char *old_file; | |
d318976c FN |
1379 | }; |
1380 | ||
1381 | static void | |
4efb68b1 | 1382 | source_cleanup_lines (void *args) |
d318976c FN |
1383 | { |
1384 | struct source_cleanup_lines_args *p = | |
1385 | (struct source_cleanup_lines_args *) args; | |
1386 | source_line_number = p->old_line; | |
1387 | source_file_name = p->old_file; | |
d318976c FN |
1388 | } |
1389 | ||
d318976c FN |
1390 | static void |
1391 | do_fclose_cleanup (void *stream) | |
1392 | { | |
1393 | fclose (stream); | |
1394 | } | |
1395 | ||
17d92a02 AC |
1396 | struct wrapped_read_command_file_args |
1397 | { | |
1398 | FILE *stream; | |
1399 | }; | |
1400 | ||
1401 | static void | |
1402 | wrapped_read_command_file (struct ui_out *uiout, void *data) | |
1403 | { | |
1404 | struct wrapped_read_command_file_args *args = data; | |
1405 | read_command_file (args->stream); | |
1406 | } | |
1407 | ||
d318976c FN |
1408 | /* Used to implement source_command */ |
1409 | ||
1410 | void | |
1411 | script_from_file (FILE *stream, char *file) | |
1412 | { | |
1413 | struct cleanup *old_cleanups; | |
1414 | struct source_cleanup_lines_args old_lines; | |
1415 | int needed_length; | |
1416 | ||
1417 | if (stream == NULL) | |
e2e0b3e5 | 1418 | internal_error (__FILE__, __LINE__, _("called with NULL file pointer!")); |
d318976c FN |
1419 | |
1420 | old_cleanups = make_cleanup (do_fclose_cleanup, stream); | |
1421 | ||
1422 | old_lines.old_line = source_line_number; | |
1423 | old_lines.old_file = source_file_name; | |
d318976c FN |
1424 | make_cleanup (source_cleanup_lines, &old_lines); |
1425 | source_line_number = 0; | |
1426 | source_file_name = file; | |
d318976c FN |
1427 | /* This will get set every time we read a line. So it won't stay "" for |
1428 | long. */ | |
1429 | error_pre_print = ""; | |
1430 | ||
17d92a02 | 1431 | { |
71fff37b | 1432 | struct gdb_exception e; |
17d92a02 AC |
1433 | struct wrapped_read_command_file_args args; |
1434 | args.stream = stream; | |
1435 | e = catch_exception (uiout, wrapped_read_command_file, &args, | |
1436 | RETURN_MASK_ERROR); | |
1437 | switch (e.reason) | |
1438 | { | |
1439 | case 0: | |
1440 | break; | |
1441 | case RETURN_ERROR: | |
1442 | /* Re-throw the error, but with the file name information | |
1443 | prepended. */ | |
109c3e39 AC |
1444 | throw_error (e.error, |
1445 | _("%s:%d: Error in sourced command file:\n%s"), | |
637537d0 | 1446 | source_file_name, source_line_number, e.message); |
17d92a02 | 1447 | default: |
e2e0b3e5 | 1448 | internal_error (__FILE__, __LINE__, _("bad reason")); |
17d92a02 AC |
1449 | } |
1450 | } | |
d318976c FN |
1451 | |
1452 | do_cleanups (old_cleanups); | |
1453 | } | |
1454 | ||
1455 | void | |
1456 | show_user_1 (struct cmd_list_element *c, struct ui_file *stream) | |
1457 | { | |
d5b5ac79 | 1458 | struct command_line *cmdlines; |
d318976c FN |
1459 | |
1460 | cmdlines = c->user_commands; | |
1461 | if (!cmdlines) | |
1462 | return; | |
1463 | fputs_filtered ("User command ", stream); | |
1464 | fputs_filtered (c->name, stream); | |
1465 | fputs_filtered (":\n", stream); | |
1466 | ||
d318976c FN |
1467 | print_command_lines (uiout, cmdlines, 1); |
1468 | fputs_filtered ("\n", stream); | |
d318976c FN |
1469 | } |
1470 |