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, |
0fb0cc75 JB |
4 | 1996, 1997, 1998, 1999, 2000, 2001, 2002, 2004, 2005, 2006, 2007, 2008, |
5 | 2009 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 | |
d57a3c85 TJB |
37 | #include "python/python.h" |
38 | ||
d318976c FN |
39 | /* Prototypes for local functions */ |
40 | ||
d318976c FN |
41 | static enum command_control_type |
42 | recurse_read_control_structure (struct command_line *current_cmd); | |
43 | ||
44 | static char *insert_args (char *line); | |
45 | ||
46 | static struct cleanup * setup_user_args (char *p); | |
47 | ||
48 | static void validate_comname (char *); | |
49 | ||
16026cd7 | 50 | /* Level of control structure when reading. */ |
d318976c FN |
51 | static int control_level; |
52 | ||
16026cd7 AS |
53 | /* Level of control structure when executing. */ |
54 | static int command_nest_depth = 1; | |
55 | ||
56 | /* This is to prevent certain commands being printed twice. */ | |
57 | static int suppress_next_print_command_trace = 0; | |
58 | ||
d318976c FN |
59 | /* Structure for arguments to user defined functions. */ |
60 | #define MAXUSERARGS 10 | |
61 | struct user_args | |
62 | { | |
63 | struct user_args *next; | |
e28493f2 AS |
64 | /* It is necessary to store a malloced copy of the command line to |
65 | ensure that the arguments are not overwritten before they are used. */ | |
66 | char *command; | |
d318976c FN |
67 | struct |
68 | { | |
69 | char *arg; | |
70 | int len; | |
71 | } | |
72 | a[MAXUSERARGS]; | |
73 | int count; | |
74 | } | |
75 | *user_args; | |
76 | ||
77 | \f | |
78 | /* Allocate, initialize a new command line structure for one of the | |
79 | control commands (if/while). */ | |
80 | ||
81 | static struct command_line * | |
82 | build_command_line (enum command_control_type type, char *args) | |
83 | { | |
84 | struct command_line *cmd; | |
85 | ||
40c03ae8 | 86 | if (args == NULL && (type == if_control || type == while_control)) |
8a3fe4f8 | 87 | error (_("if/while commands require arguments.")); |
c8c12293 | 88 | gdb_assert (args != NULL); |
d318976c FN |
89 | |
90 | cmd = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
91 | cmd->next = NULL; | |
92 | cmd->control_type = type; | |
93 | ||
94 | cmd->body_count = 1; | |
95 | cmd->body_list | |
96 | = (struct command_line **) xmalloc (sizeof (struct command_line *) | |
97 | * cmd->body_count); | |
98 | memset (cmd->body_list, 0, sizeof (struct command_line *) * cmd->body_count); | |
c8c12293 | 99 | cmd->line = savestring (args, strlen (args)); |
dd3526aa | 100 | |
d318976c FN |
101 | return cmd; |
102 | } | |
103 | ||
104 | /* Build and return a new command structure for the control commands | |
105 | such as "if" and "while". */ | |
106 | ||
d57a3c85 | 107 | struct command_line * |
d318976c FN |
108 | get_command_line (enum command_control_type type, char *arg) |
109 | { | |
110 | struct command_line *cmd; | |
111 | struct cleanup *old_chain = NULL; | |
112 | ||
113 | /* Allocate and build a new command line structure. */ | |
114 | cmd = build_command_line (type, arg); | |
115 | ||
116 | old_chain = make_cleanup_free_command_lines (&cmd); | |
117 | ||
118 | /* Read in the body of this command. */ | |
119 | if (recurse_read_control_structure (cmd) == invalid_control) | |
120 | { | |
40c03ae8 | 121 | warning (_("Error reading in canned sequence of commands.")); |
d318976c FN |
122 | do_cleanups (old_chain); |
123 | return NULL; | |
124 | } | |
125 | ||
126 | discard_cleanups (old_chain); | |
127 | return cmd; | |
128 | } | |
129 | ||
130 | /* Recursively print a command (including full control structures). */ | |
8926118c | 131 | |
d318976c FN |
132 | void |
133 | print_command_lines (struct ui_out *uiout, struct command_line *cmd, | |
134 | unsigned int depth) | |
135 | { | |
136 | struct command_line *list; | |
137 | ||
138 | list = cmd; | |
139 | while (list) | |
140 | { | |
141 | ||
142 | if (depth) | |
143 | ui_out_spaces (uiout, 2 * depth); | |
144 | ||
145 | /* A simple command, print it and continue. */ | |
146 | if (list->control_type == simple_control) | |
147 | { | |
148 | ui_out_field_string (uiout, NULL, list->line); | |
149 | ui_out_text (uiout, "\n"); | |
150 | list = list->next; | |
151 | continue; | |
152 | } | |
153 | ||
154 | /* loop_continue to jump to the start of a while loop, print it | |
155 | and continue. */ | |
156 | if (list->control_type == continue_control) | |
157 | { | |
158 | ui_out_field_string (uiout, NULL, "loop_continue"); | |
159 | ui_out_text (uiout, "\n"); | |
160 | list = list->next; | |
161 | continue; | |
162 | } | |
163 | ||
164 | /* loop_break to break out of a while loop, print it and continue. */ | |
165 | if (list->control_type == break_control) | |
166 | { | |
167 | ui_out_field_string (uiout, NULL, "loop_break"); | |
168 | ui_out_text (uiout, "\n"); | |
169 | list = list->next; | |
170 | continue; | |
171 | } | |
172 | ||
173 | /* A while command. Recursively print its subcommands and continue. */ | |
174 | if (list->control_type == while_control) | |
175 | { | |
d318976c FN |
176 | ui_out_field_fmt (uiout, NULL, "while %s", list->line); |
177 | ui_out_text (uiout, "\n"); | |
178 | print_command_lines (uiout, *list->body_list, depth + 1); | |
d318976c FN |
179 | if (depth) |
180 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
181 | ui_out_field_string (uiout, NULL, "end"); |
182 | ui_out_text (uiout, "\n"); | |
d318976c FN |
183 | list = list->next; |
184 | continue; | |
185 | } | |
186 | ||
187 | /* An if command. Recursively print both arms before continueing. */ | |
188 | if (list->control_type == if_control) | |
189 | { | |
d318976c FN |
190 | ui_out_field_fmt (uiout, NULL, "if %s", list->line); |
191 | ui_out_text (uiout, "\n"); | |
192 | /* The true arm. */ | |
193 | print_command_lines (uiout, list->body_list[0], depth + 1); | |
194 | ||
195 | /* Show the false arm if it exists. */ | |
196 | if (list->body_count == 2) | |
197 | { | |
198 | if (depth) | |
199 | ui_out_spaces (uiout, 2 * depth); | |
200 | ui_out_field_string (uiout, NULL, "else"); | |
e6ccd35f | 201 | ui_out_text (uiout, "\n"); |
d318976c FN |
202 | print_command_lines (uiout, list->body_list[1], depth + 1); |
203 | } | |
204 | ||
d318976c FN |
205 | if (depth) |
206 | ui_out_spaces (uiout, 2 * depth); | |
e6ccd35f JSC |
207 | ui_out_field_string (uiout, NULL, "end"); |
208 | ui_out_text (uiout, "\n"); | |
d318976c FN |
209 | list = list->next; |
210 | continue; | |
211 | } | |
212 | ||
40c03ae8 EZ |
213 | /* A commands command. Print the breakpoint commands and continue. */ |
214 | if (list->control_type == commands_control) | |
215 | { | |
216 | if (*(list->line)) | |
217 | ui_out_field_fmt (uiout, NULL, "commands %s", list->line); | |
218 | else | |
219 | ui_out_field_string (uiout, NULL, "commands"); | |
220 | ui_out_text (uiout, "\n"); | |
221 | print_command_lines (uiout, *list->body_list, depth + 1); | |
222 | if (depth) | |
223 | ui_out_spaces (uiout, 2 * depth); | |
224 | ui_out_field_string (uiout, NULL, "end"); | |
225 | ui_out_text (uiout, "\n"); | |
226 | list = list->next; | |
227 | continue; | |
228 | } | |
229 | ||
d57a3c85 TJB |
230 | if (list->control_type == python_control) |
231 | { | |
232 | ui_out_field_string (uiout, NULL, "python"); | |
233 | ui_out_text (uiout, "\n"); | |
234 | /* Don't indent python code at all. */ | |
235 | print_command_lines (uiout, *list->body_list, 0); | |
236 | if (depth) | |
237 | ui_out_spaces (uiout, 2 * depth); | |
238 | ui_out_field_string (uiout, NULL, "end"); | |
239 | ui_out_text (uiout, "\n"); | |
240 | list = list->next; | |
241 | continue; | |
242 | } | |
243 | ||
d318976c FN |
244 | /* ignore illegal command type and try next */ |
245 | list = list->next; | |
246 | } /* while (list) */ | |
247 | } | |
d318976c | 248 | |
5913bcb0 AC |
249 | /* Handle pre-post hooks. */ |
250 | ||
b9362cc7 | 251 | static void |
5913bcb0 AC |
252 | clear_hook_in_cleanup (void *data) |
253 | { | |
254 | struct cmd_list_element *c = data; | |
255 | c->hook_in = 0; /* Allow hook to work again once it is complete */ | |
256 | } | |
257 | ||
258 | void | |
259 | execute_cmd_pre_hook (struct cmd_list_element *c) | |
260 | { | |
261 | if ((c->hook_pre) && (!c->hook_in)) | |
262 | { | |
263 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
264 | c->hook_in = 1; /* Prevent recursive hooking */ | |
265 | execute_user_command (c->hook_pre, (char *) 0); | |
266 | do_cleanups (cleanups); | |
267 | } | |
268 | } | |
269 | ||
270 | void | |
271 | execute_cmd_post_hook (struct cmd_list_element *c) | |
272 | { | |
273 | if ((c->hook_post) && (!c->hook_in)) | |
274 | { | |
275 | struct cleanup *cleanups = make_cleanup (clear_hook_in_cleanup, c); | |
276 | c->hook_in = 1; /* Prevent recursive hooking */ | |
277 | execute_user_command (c->hook_post, (char *) 0); | |
278 | do_cleanups (cleanups); | |
279 | } | |
280 | } | |
281 | ||
d318976c | 282 | /* Execute the command in CMD. */ |
b9362cc7 | 283 | static void |
20f01a46 DH |
284 | do_restore_user_call_depth (void * call_depth) |
285 | { | |
286 | int * depth = call_depth; | |
698ba934 DJ |
287 | (*depth)--; |
288 | if ((*depth) == 0) | |
289 | in_user_command = 0; | |
20f01a46 DH |
290 | } |
291 | ||
d318976c FN |
292 | |
293 | void | |
294 | execute_user_command (struct cmd_list_element *c, char *args) | |
295 | { | |
d5b5ac79 | 296 | struct command_line *cmdlines; |
d318976c FN |
297 | struct cleanup *old_chain; |
298 | enum command_control_type ret; | |
20f01a46 DH |
299 | static int user_call_depth = 0; |
300 | extern int max_user_call_depth; | |
d318976c FN |
301 | |
302 | old_chain = setup_user_args (args); | |
303 | ||
304 | cmdlines = c->user_commands; | |
305 | if (cmdlines == 0) | |
306 | /* Null command */ | |
307 | return; | |
308 | ||
20f01a46 | 309 | if (++user_call_depth > max_user_call_depth) |
8a3fe4f8 | 310 | error (_("Max user call depth exceeded -- command aborted.")); |
20f01a46 | 311 | |
698ba934 | 312 | make_cleanup (do_restore_user_call_depth, &user_call_depth); |
20f01a46 | 313 | |
d318976c FN |
314 | /* Set the instream to 0, indicating execution of a |
315 | user-defined function. */ | |
698ba934 | 316 | make_cleanup (do_restore_instream_cleanup, instream); |
d318976c | 317 | instream = (FILE *) 0; |
698ba934 DJ |
318 | |
319 | /* Also set the global in_user_command, so that NULL instream is | |
320 | not confused with Insight. */ | |
321 | in_user_command = 1; | |
322 | ||
8625200f | 323 | command_nest_depth++; |
d318976c FN |
324 | while (cmdlines) |
325 | { | |
326 | ret = execute_control_command (cmdlines); | |
327 | if (ret != simple_control && ret != break_control) | |
328 | { | |
40c03ae8 | 329 | warning (_("Error executing canned sequence of commands.")); |
d318976c FN |
330 | break; |
331 | } | |
332 | cmdlines = cmdlines->next; | |
333 | } | |
8625200f | 334 | command_nest_depth--; |
d318976c FN |
335 | do_cleanups (old_chain); |
336 | } | |
337 | ||
16026cd7 AS |
338 | /* This function is called every time GDB prints a prompt. |
339 | It ensures that errors and the like to not confuse the command tracing. */ | |
340 | ||
341 | void | |
342 | reset_command_nest_depth (void) | |
343 | { | |
344 | command_nest_depth = 1; | |
345 | ||
346 | /* Just in case. */ | |
347 | suppress_next_print_command_trace = 0; | |
348 | } | |
349 | ||
350 | /* Print the command, prefixed with '+' to represent the call depth. | |
351 | This is slightly complicated because this function may be called | |
352 | from execute_command and execute_control_command. Unfortunately | |
353 | execute_command also prints the top level control commands. | |
354 | In these cases execute_command will call execute_control_command | |
355 | via while_command or if_command. Inner levels of 'if' and 'while' | |
356 | are dealt with directly. Therefore we can use these functions | |
357 | to determine whether the command has been printed already or not. */ | |
358 | void | |
359 | print_command_trace (const char *cmd) | |
360 | { | |
361 | int i; | |
362 | ||
363 | if (suppress_next_print_command_trace) | |
364 | { | |
365 | suppress_next_print_command_trace = 0; | |
366 | return; | |
367 | } | |
368 | ||
369 | if (!source_verbose && !trace_commands) | |
370 | return; | |
371 | ||
372 | for (i=0; i < command_nest_depth; i++) | |
373 | printf_filtered ("+"); | |
374 | ||
375 | printf_filtered ("%s\n", cmd); | |
376 | } | |
377 | ||
d318976c FN |
378 | enum command_control_type |
379 | execute_control_command (struct command_line *cmd) | |
380 | { | |
381 | struct expression *expr; | |
382 | struct command_line *current; | |
4d2acc65 | 383 | struct cleanup *old_chain = make_cleanup (null_cleanup, 0); |
f976f6d4 AC |
384 | struct value *val; |
385 | struct value *val_mark; | |
d318976c FN |
386 | int loop; |
387 | enum command_control_type ret; | |
388 | char *new_line; | |
389 | ||
4d2acc65 AC |
390 | /* Start by assuming failure, if a problem is detected, the code |
391 | below will simply "break" out of the switch. */ | |
392 | ret = invalid_control; | |
393 | ||
d318976c FN |
394 | switch (cmd->control_type) |
395 | { | |
396 | case simple_control: | |
397 | /* A simple command, execute it and return. */ | |
398 | new_line = insert_args (cmd->line); | |
399 | if (!new_line) | |
4d2acc65 AC |
400 | break; |
401 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
402 | execute_command (new_line, 0); |
403 | ret = cmd->control_type; | |
404 | break; | |
405 | ||
406 | case continue_control: | |
16026cd7 AS |
407 | print_command_trace ("loop_continue"); |
408 | ||
409 | /* Return for "continue", and "break" so we can either | |
410 | continue the loop at the top, or break out. */ | |
411 | ret = cmd->control_type; | |
412 | break; | |
413 | ||
d318976c | 414 | case break_control: |
16026cd7 AS |
415 | print_command_trace ("loop_break"); |
416 | ||
d318976c FN |
417 | /* Return for "continue", and "break" so we can either |
418 | continue the loop at the top, or break out. */ | |
419 | ret = cmd->control_type; | |
420 | break; | |
421 | ||
422 | case while_control: | |
423 | { | |
16026cd7 AS |
424 | char *buffer = alloca (strlen (cmd->line) + 7); |
425 | sprintf (buffer, "while %s", cmd->line); | |
426 | print_command_trace (buffer); | |
427 | ||
d318976c FN |
428 | /* Parse the loop control expression for the while statement. */ |
429 | new_line = insert_args (cmd->line); | |
430 | if (!new_line) | |
4d2acc65 AC |
431 | break; |
432 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
433 | expr = parse_expression (new_line); |
434 | make_cleanup (free_current_contents, &expr); | |
435 | ||
436 | ret = simple_control; | |
437 | loop = 1; | |
438 | ||
439 | /* Keep iterating so long as the expression is true. */ | |
440 | while (loop == 1) | |
441 | { | |
442 | int cond_result; | |
443 | ||
444 | QUIT; | |
445 | ||
446 | /* Evaluate the expression. */ | |
447 | val_mark = value_mark (); | |
448 | val = evaluate_expression (expr); | |
449 | cond_result = value_true (val); | |
450 | value_free_to_mark (val_mark); | |
451 | ||
452 | /* If the value is false, then break out of the loop. */ | |
453 | if (!cond_result) | |
454 | break; | |
455 | ||
456 | /* Execute the body of the while statement. */ | |
457 | current = *cmd->body_list; | |
458 | while (current) | |
459 | { | |
16026cd7 | 460 | command_nest_depth++; |
d318976c | 461 | ret = execute_control_command (current); |
16026cd7 | 462 | command_nest_depth--; |
d318976c FN |
463 | |
464 | /* If we got an error, or a "break" command, then stop | |
465 | looping. */ | |
466 | if (ret == invalid_control || ret == break_control) | |
467 | { | |
468 | loop = 0; | |
469 | break; | |
470 | } | |
471 | ||
472 | /* If we got a "continue" command, then restart the loop | |
473 | at this point. */ | |
474 | if (ret == continue_control) | |
475 | break; | |
476 | ||
477 | /* Get the next statement. */ | |
478 | current = current->next; | |
479 | } | |
480 | } | |
481 | ||
482 | /* Reset RET so that we don't recurse the break all the way down. */ | |
483 | if (ret == break_control) | |
484 | ret = simple_control; | |
485 | ||
486 | break; | |
487 | } | |
488 | ||
489 | case if_control: | |
490 | { | |
16026cd7 AS |
491 | char *buffer = alloca (strlen (cmd->line) + 4); |
492 | sprintf (buffer, "if %s", cmd->line); | |
493 | print_command_trace (buffer); | |
494 | ||
d318976c FN |
495 | new_line = insert_args (cmd->line); |
496 | if (!new_line) | |
4d2acc65 AC |
497 | break; |
498 | make_cleanup (free_current_contents, &new_line); | |
d318976c FN |
499 | /* Parse the conditional for the if statement. */ |
500 | expr = parse_expression (new_line); | |
501 | make_cleanup (free_current_contents, &expr); | |
502 | ||
503 | current = NULL; | |
504 | ret = simple_control; | |
505 | ||
506 | /* Evaluate the conditional. */ | |
507 | val_mark = value_mark (); | |
508 | val = evaluate_expression (expr); | |
509 | ||
510 | /* Choose which arm to take commands from based on the value of the | |
511 | conditional expression. */ | |
512 | if (value_true (val)) | |
513 | current = *cmd->body_list; | |
514 | else if (cmd->body_count == 2) | |
515 | current = *(cmd->body_list + 1); | |
516 | value_free_to_mark (val_mark); | |
517 | ||
518 | /* Execute commands in the given arm. */ | |
519 | while (current) | |
520 | { | |
16026cd7 | 521 | command_nest_depth++; |
d318976c | 522 | ret = execute_control_command (current); |
16026cd7 | 523 | command_nest_depth--; |
d318976c FN |
524 | |
525 | /* If we got an error, get out. */ | |
526 | if (ret != simple_control) | |
527 | break; | |
528 | ||
529 | /* Get the next statement in the body. */ | |
530 | current = current->next; | |
531 | } | |
532 | ||
533 | break; | |
534 | } | |
40c03ae8 EZ |
535 | case commands_control: |
536 | { | |
537 | /* Breakpoint commands list, record the commands in the breakpoint's | |
538 | command list and return. */ | |
539 | new_line = insert_args (cmd->line); | |
540 | if (!new_line) | |
541 | break; | |
542 | make_cleanup (free_current_contents, &new_line); | |
543 | ret = commands_from_control_command (new_line, cmd); | |
544 | break; | |
545 | } | |
d57a3c85 TJB |
546 | case python_control: |
547 | { | |
548 | eval_python_from_control_command (cmd); | |
549 | ret = simple_control; | |
550 | break; | |
551 | } | |
d318976c FN |
552 | |
553 | default: | |
40c03ae8 | 554 | warning (_("Invalid control type in canned commands structure.")); |
4d2acc65 | 555 | break; |
d318976c FN |
556 | } |
557 | ||
4d2acc65 | 558 | do_cleanups (old_chain); |
d318976c FN |
559 | |
560 | return ret; | |
561 | } | |
562 | ||
d57a3c85 TJB |
563 | /* Like execute_control_command, but first set |
564 | suppress_next_print_command_trace. */ | |
565 | ||
566 | enum command_control_type | |
567 | execute_control_command_untraced (struct command_line *cmd) | |
568 | { | |
569 | suppress_next_print_command_trace = 1; | |
570 | return execute_control_command (cmd); | |
571 | } | |
572 | ||
573 | ||
d318976c FN |
574 | /* "while" command support. Executes a body of statements while the |
575 | loop condition is nonzero. */ | |
576 | ||
577 | void | |
578 | while_command (char *arg, int from_tty) | |
579 | { | |
580 | struct command_line *command = NULL; | |
581 | ||
582 | control_level = 1; | |
583 | command = get_command_line (while_control, arg); | |
584 | ||
585 | if (command == NULL) | |
586 | return; | |
587 | ||
d57a3c85 | 588 | execute_control_command_untraced (command); |
d318976c FN |
589 | free_command_lines (&command); |
590 | } | |
591 | ||
592 | /* "if" command support. Execute either the true or false arm depending | |
593 | on the value of the if conditional. */ | |
594 | ||
595 | void | |
596 | if_command (char *arg, int from_tty) | |
597 | { | |
598 | struct command_line *command = NULL; | |
599 | ||
600 | control_level = 1; | |
601 | command = get_command_line (if_control, arg); | |
602 | ||
603 | if (command == NULL) | |
604 | return; | |
605 | ||
d57a3c85 | 606 | execute_control_command_untraced (command); |
d318976c FN |
607 | free_command_lines (&command); |
608 | } | |
609 | ||
610 | /* Cleanup */ | |
611 | static void | |
612 | arg_cleanup (void *ignore) | |
613 | { | |
614 | struct user_args *oargs = user_args; | |
615 | if (!user_args) | |
8e65ff28 | 616 | internal_error (__FILE__, __LINE__, |
e2e0b3e5 | 617 | _("arg_cleanup called with no user args.\n")); |
d318976c FN |
618 | |
619 | user_args = user_args->next; | |
e28493f2 | 620 | xfree (oargs->command); |
b8c9b27d | 621 | xfree (oargs); |
d318976c FN |
622 | } |
623 | ||
624 | /* Bind the incomming arguments for a user defined command to | |
625 | $arg0, $arg1 ... $argMAXUSERARGS. */ | |
626 | ||
627 | static struct cleanup * | |
628 | setup_user_args (char *p) | |
629 | { | |
630 | struct user_args *args; | |
631 | struct cleanup *old_chain; | |
632 | unsigned int arg_count = 0; | |
633 | ||
634 | args = (struct user_args *) xmalloc (sizeof (struct user_args)); | |
635 | memset (args, 0, sizeof (struct user_args)); | |
636 | ||
637 | args->next = user_args; | |
638 | user_args = args; | |
639 | ||
640 | old_chain = make_cleanup (arg_cleanup, 0/*ignored*/); | |
641 | ||
642 | if (p == NULL) | |
643 | return old_chain; | |
644 | ||
e28493f2 AS |
645 | user_args->command = p = xstrdup (p); |
646 | ||
d318976c FN |
647 | while (*p) |
648 | { | |
649 | char *start_arg; | |
650 | int squote = 0; | |
651 | int dquote = 0; | |
652 | int bsquote = 0; | |
653 | ||
654 | if (arg_count >= MAXUSERARGS) | |
655 | { | |
8a3fe4f8 | 656 | error (_("user defined function may only have %d arguments."), |
d318976c FN |
657 | MAXUSERARGS); |
658 | return old_chain; | |
659 | } | |
660 | ||
661 | /* Strip whitespace. */ | |
662 | while (*p == ' ' || *p == '\t') | |
663 | p++; | |
664 | ||
665 | /* P now points to an argument. */ | |
666 | start_arg = p; | |
667 | user_args->a[arg_count].arg = p; | |
668 | ||
669 | /* Get to the end of this argument. */ | |
670 | while (*p) | |
671 | { | |
672 | if (((*p == ' ' || *p == '\t')) && !squote && !dquote && !bsquote) | |
673 | break; | |
674 | else | |
675 | { | |
676 | if (bsquote) | |
677 | bsquote = 0; | |
678 | else if (*p == '\\') | |
679 | bsquote = 1; | |
680 | else if (squote) | |
681 | { | |
682 | if (*p == '\'') | |
683 | squote = 0; | |
684 | } | |
685 | else if (dquote) | |
686 | { | |
687 | if (*p == '"') | |
688 | dquote = 0; | |
689 | } | |
690 | else | |
691 | { | |
692 | if (*p == '\'') | |
693 | squote = 1; | |
694 | else if (*p == '"') | |
695 | dquote = 1; | |
696 | } | |
697 | p++; | |
698 | } | |
699 | } | |
700 | ||
701 | user_args->a[arg_count].len = p - start_arg; | |
702 | arg_count++; | |
703 | user_args->count++; | |
704 | } | |
705 | return old_chain; | |
706 | } | |
707 | ||
708 | /* Given character string P, return a point to the first argument ($arg), | |
709 | or NULL if P contains no arguments. */ | |
710 | ||
711 | static char * | |
712 | locate_arg (char *p) | |
713 | { | |
714 | while ((p = strchr (p, '$'))) | |
715 | { | |
c03c782f AS |
716 | if (strncmp (p, "$arg", 4) == 0 |
717 | && (isdigit (p[4]) || p[4] == 'c')) | |
d318976c FN |
718 | return p; |
719 | p++; | |
720 | } | |
721 | return NULL; | |
722 | } | |
723 | ||
724 | /* Insert the user defined arguments stored in user_arg into the $arg | |
725 | arguments found in line, with the updated copy being placed into nline. */ | |
726 | ||
727 | static char * | |
728 | insert_args (char *line) | |
729 | { | |
730 | char *p, *save_line, *new_line; | |
731 | unsigned len, i; | |
732 | ||
61d9b92f DJ |
733 | /* If we are not in a user-defined function, treat $argc, $arg0, et |
734 | cetera as normal convenience variables. */ | |
735 | if (user_args == NULL) | |
736 | return xstrdup (line); | |
737 | ||
d318976c FN |
738 | /* First we need to know how much memory to allocate for the new line. */ |
739 | save_line = line; | |
740 | len = 0; | |
741 | while ((p = locate_arg (line))) | |
742 | { | |
743 | len += p - line; | |
744 | i = p[4] - '0'; | |
745 | ||
c03c782f AS |
746 | if (p[4] == 'c') |
747 | { | |
748 | /* $argc. Number will be <=10. */ | |
749 | len += user_args->count == 10 ? 2 : 1; | |
750 | } | |
751 | else if (i >= user_args->count) | |
d318976c | 752 | { |
8a3fe4f8 | 753 | error (_("Missing argument %d in user function."), i); |
d318976c FN |
754 | return NULL; |
755 | } | |
c03c782f AS |
756 | else |
757 | { | |
758 | len += user_args->a[i].len; | |
759 | } | |
d318976c FN |
760 | line = p + 5; |
761 | } | |
762 | ||
763 | /* Don't forget the tail. */ | |
764 | len += strlen (line); | |
765 | ||
766 | /* Allocate space for the new line and fill it in. */ | |
767 | new_line = (char *) xmalloc (len + 1); | |
768 | if (new_line == NULL) | |
769 | return NULL; | |
770 | ||
771 | /* Restore pointer to beginning of old line. */ | |
772 | line = save_line; | |
773 | ||
774 | /* Save pointer to beginning of new line. */ | |
775 | save_line = new_line; | |
776 | ||
777 | while ((p = locate_arg (line))) | |
778 | { | |
779 | int i, len; | |
780 | ||
781 | memcpy (new_line, line, p - line); | |
782 | new_line += p - line; | |
d318976c | 783 | |
c03c782f AS |
784 | if (p[4] == 'c') |
785 | { | |
786 | gdb_assert (user_args->count >= 0 && user_args->count <= 10); | |
787 | if (user_args->count == 10) | |
788 | { | |
789 | *(new_line++) = '1'; | |
790 | *(new_line++) = '0'; | |
791 | } | |
792 | else | |
793 | *(new_line++) = user_args->count + '0'; | |
794 | } | |
795 | else | |
d318976c | 796 | { |
c03c782f AS |
797 | i = p[4] - '0'; |
798 | len = user_args->a[i].len; | |
799 | if (len) | |
800 | { | |
801 | memcpy (new_line, user_args->a[i].arg, len); | |
802 | new_line += len; | |
803 | } | |
d318976c FN |
804 | } |
805 | line = p + 5; | |
806 | } | |
807 | /* Don't forget the tail. */ | |
808 | strcpy (new_line, line); | |
809 | ||
810 | /* Return a pointer to the beginning of the new line. */ | |
811 | return save_line; | |
812 | } | |
813 | ||
814 | \f | |
815 | /* Expand the body_list of COMMAND so that it can hold NEW_LENGTH | |
816 | code bodies. This is typically used when we encounter an "else" | |
817 | clause for an "if" command. */ | |
818 | ||
819 | static void | |
820 | realloc_body_list (struct command_line *command, int new_length) | |
821 | { | |
822 | int n; | |
823 | struct command_line **body_list; | |
824 | ||
825 | n = command->body_count; | |
826 | ||
827 | /* Nothing to do? */ | |
828 | if (new_length <= n) | |
829 | return; | |
830 | ||
831 | body_list = (struct command_line **) | |
832 | xmalloc (sizeof (struct command_line *) * new_length); | |
833 | ||
834 | memcpy (body_list, command->body_list, sizeof (struct command_line *) * n); | |
42b575e5 | 835 | memset (body_list + n, 0, sizeof (struct command_line *) * (new_length - n)); |
d318976c | 836 | |
b8c9b27d | 837 | xfree (command->body_list); |
d318976c FN |
838 | command->body_list = body_list; |
839 | command->body_count = new_length; | |
840 | } | |
841 | ||
311a4e6b TJB |
842 | /* Read one line from the input stream. If the command is an "end", |
843 | return such an indication to the caller. If PARSE_COMMANDS is true, | |
844 | strip leading whitespace (trailing whitespace is always stripped) | |
845 | in the line, attempt to recognize GDB control commands, and also | |
846 | return an indication if the command is an "else" or a nop. | |
847 | Otherwise, only "end" is recognized. */ | |
d318976c FN |
848 | |
849 | static enum misc_command_type | |
311a4e6b | 850 | read_next_line (struct command_line **command, int parse_commands) |
d318976c FN |
851 | { |
852 | char *p, *p1, *prompt_ptr, control_prompt[256]; | |
853 | int i = 0; | |
311a4e6b | 854 | int not_handled = 0; |
d318976c FN |
855 | |
856 | if (control_level >= 254) | |
8a3fe4f8 | 857 | error (_("Control nesting too deep!")); |
d318976c FN |
858 | |
859 | /* Set a prompt based on the nesting of the control commands. */ | |
9a4105ab | 860 | if (instream == stdin || (instream == 0 && deprecated_readline_hook != NULL)) |
d318976c FN |
861 | { |
862 | for (i = 0; i < control_level; i++) | |
863 | control_prompt[i] = ' '; | |
864 | control_prompt[i] = '>'; | |
865 | control_prompt[i + 1] = '\0'; | |
866 | prompt_ptr = (char *) &control_prompt[0]; | |
867 | } | |
868 | else | |
869 | prompt_ptr = NULL; | |
870 | ||
871 | p = command_line_input (prompt_ptr, instream == stdin, "commands"); | |
872 | ||
873 | /* Not sure what to do here. */ | |
874 | if (p == NULL) | |
875 | return end_command; | |
876 | ||
311a4e6b TJB |
877 | if (parse_commands) |
878 | { | |
879 | /* Strip leading whitespace. */ | |
880 | while (*p == ' ' || *p == '\t') | |
881 | p++; | |
882 | } | |
d318976c | 883 | |
311a4e6b | 884 | /* Strip trailing whitespace. */ |
d318976c FN |
885 | p1 = p + strlen (p); |
886 | while (p1 != p && (p1[-1] == ' ' || p1[-1] == '\t')) | |
887 | p1--; | |
888 | ||
d318976c FN |
889 | /* Is this the end of a simple, while, or if control structure? */ |
890 | if (p1 - p == 3 && !strncmp (p, "end", 3)) | |
891 | return end_command; | |
892 | ||
311a4e6b | 893 | if (parse_commands) |
d318976c | 894 | { |
311a4e6b TJB |
895 | /* Blanks and comments don't really do anything, but we need to |
896 | distinguish them from else, end and other commands which can be | |
897 | executed. */ | |
898 | if (p1 == p || p[0] == '#') | |
899 | return nop_command; | |
900 | ||
901 | /* Is the else clause of an if control structure? */ | |
902 | if (p1 - p == 4 && !strncmp (p, "else", 4)) | |
903 | return else_command; | |
904 | ||
905 | /* Check for while, if, break, continue, etc and build a new command | |
906 | line structure for them. */ | |
907 | if (p1 - p > 5 && !strncmp (p, "while", 5)) | |
908 | { | |
909 | char *first_arg; | |
910 | first_arg = p + 5; | |
911 | while (first_arg < p1 && isspace (*first_arg)) | |
912 | first_arg++; | |
913 | *command = build_command_line (while_control, first_arg); | |
914 | } | |
915 | else if (p1 - p > 2 && !strncmp (p, "if", 2)) | |
916 | { | |
917 | char *first_arg; | |
918 | first_arg = p + 2; | |
919 | while (first_arg < p1 && isspace (*first_arg)) | |
920 | first_arg++; | |
921 | *command = build_command_line (if_control, first_arg); | |
922 | } | |
923 | else if (p1 - p >= 8 && !strncmp (p, "commands", 8)) | |
924 | { | |
925 | char *first_arg; | |
926 | first_arg = p + 8; | |
927 | while (first_arg < p1 && isspace (*first_arg)) | |
928 | first_arg++; | |
929 | *command = build_command_line (commands_control, first_arg); | |
930 | } | |
931 | else if (p1 - p == 6 && !strncmp (p, "python", 6)) | |
932 | { | |
933 | /* Note that we ignore the inline "python command" form | |
934 | here. */ | |
935 | *command = build_command_line (python_control, ""); | |
936 | } | |
937 | else if (p1 - p == 10 && !strncmp (p, "loop_break", 10)) | |
938 | { | |
939 | *command = (struct command_line *) | |
940 | xmalloc (sizeof (struct command_line)); | |
941 | (*command)->next = NULL; | |
942 | (*command)->line = NULL; | |
943 | (*command)->control_type = break_control; | |
944 | (*command)->body_count = 0; | |
945 | (*command)->body_list = NULL; | |
946 | } | |
947 | else if (p1 - p == 13 && !strncmp (p, "loop_continue", 13)) | |
948 | { | |
949 | *command = (struct command_line *) | |
950 | xmalloc (sizeof (struct command_line)); | |
951 | (*command)->next = NULL; | |
952 | (*command)->line = NULL; | |
953 | (*command)->control_type = continue_control; | |
954 | (*command)->body_count = 0; | |
955 | (*command)->body_list = NULL; | |
956 | } | |
957 | else | |
958 | not_handled = 1; | |
d318976c | 959 | } |
311a4e6b TJB |
960 | |
961 | if (!parse_commands || not_handled) | |
d318976c FN |
962 | { |
963 | /* A normal command. */ | |
964 | *command = (struct command_line *) | |
965 | xmalloc (sizeof (struct command_line)); | |
966 | (*command)->next = NULL; | |
967 | (*command)->line = savestring (p, p1 - p); | |
968 | (*command)->control_type = simple_control; | |
969 | (*command)->body_count = 0; | |
970 | (*command)->body_list = NULL; | |
971 | } | |
972 | ||
973 | /* Nothing special. */ | |
974 | return ok_command; | |
975 | } | |
976 | ||
977 | /* Recursively read in the control structures and create a command_line | |
978 | structure from them. | |
979 | ||
980 | The parent_control parameter is the control structure in which the | |
981 | following commands are nested. */ | |
982 | ||
983 | static enum command_control_type | |
984 | recurse_read_control_structure (struct command_line *current_cmd) | |
985 | { | |
986 | int current_body, i; | |
987 | enum misc_command_type val; | |
988 | enum command_control_type ret; | |
989 | struct command_line **body_ptr, *child_tail, *next; | |
990 | ||
991 | child_tail = NULL; | |
992 | current_body = 1; | |
993 | ||
994 | /* Sanity checks. */ | |
995 | if (current_cmd->control_type == simple_control) | |
8a3fe4f8 | 996 | error (_("Recursed on a simple control type.")); |
d318976c FN |
997 | |
998 | if (current_body > current_cmd->body_count) | |
8a3fe4f8 | 999 | error (_("Allocated body is smaller than this command type needs.")); |
d318976c FN |
1000 | |
1001 | /* Read lines from the input stream and build control structures. */ | |
1002 | while (1) | |
1003 | { | |
1004 | dont_repeat (); | |
1005 | ||
1006 | next = NULL; | |
311a4e6b | 1007 | val = read_next_line (&next, current_cmd->control_type != python_control); |
d318976c FN |
1008 | |
1009 | /* Just skip blanks and comments. */ | |
1010 | if (val == nop_command) | |
1011 | continue; | |
1012 | ||
1013 | if (val == end_command) | |
1014 | { | |
1015 | if (current_cmd->control_type == while_control | |
40c03ae8 | 1016 | || current_cmd->control_type == if_control |
d57a3c85 | 1017 | || current_cmd->control_type == python_control |
40c03ae8 | 1018 | || current_cmd->control_type == commands_control) |
d318976c | 1019 | { |
40c03ae8 | 1020 | /* Success reading an entire canned sequence of commands. */ |
d318976c FN |
1021 | ret = simple_control; |
1022 | break; | |
1023 | } | |
1024 | else | |
1025 | { | |
1026 | ret = invalid_control; | |
1027 | break; | |
1028 | } | |
1029 | } | |
1030 | ||
1031 | /* Not the end of a control structure. */ | |
1032 | if (val == else_command) | |
1033 | { | |
1034 | if (current_cmd->control_type == if_control | |
1035 | && current_body == 1) | |
1036 | { | |
1037 | realloc_body_list (current_cmd, 2); | |
1038 | current_body = 2; | |
1039 | child_tail = NULL; | |
1040 | continue; | |
1041 | } | |
1042 | else | |
1043 | { | |
1044 | ret = invalid_control; | |
1045 | break; | |
1046 | } | |
1047 | } | |
1048 | ||
1049 | if (child_tail) | |
1050 | { | |
1051 | child_tail->next = next; | |
1052 | } | |
1053 | else | |
1054 | { | |
1055 | body_ptr = current_cmd->body_list; | |
1056 | for (i = 1; i < current_body; i++) | |
1057 | body_ptr++; | |
1058 | ||
1059 | *body_ptr = next; | |
1060 | ||
1061 | } | |
1062 | ||
1063 | child_tail = next; | |
1064 | ||
1065 | /* If the latest line is another control structure, then recurse | |
1066 | on it. */ | |
1067 | if (next->control_type == while_control | |
40c03ae8 | 1068 | || next->control_type == if_control |
d57a3c85 | 1069 | || next->control_type == python_control |
40c03ae8 | 1070 | || next->control_type == commands_control) |
d318976c FN |
1071 | { |
1072 | control_level++; | |
1073 | ret = recurse_read_control_structure (next); | |
1074 | control_level--; | |
1075 | ||
1076 | if (ret != simple_control) | |
1077 | break; | |
1078 | } | |
1079 | } | |
1080 | ||
1081 | dont_repeat (); | |
1082 | ||
1083 | return ret; | |
1084 | } | |
1085 | ||
1086 | /* Read lines from the input stream and accumulate them in a chain of | |
1087 | struct command_line's, which is then returned. For input from a | |
1088 | terminal, the special command "end" is used to mark the end of the | |
311a4e6b TJB |
1089 | input, and is not included in the returned chain of commands. |
1090 | ||
1091 | If PARSE_COMMANDS is true, strip leading whitespace (trailing whitespace | |
1092 | is always stripped) in the line and attempt to recognize GDB control | |
1093 | commands. Otherwise, only "end" is recognized. */ | |
d318976c FN |
1094 | |
1095 | #define END_MESSAGE "End with a line saying just \"end\"." | |
1096 | ||
1097 | struct command_line * | |
311a4e6b | 1098 | read_command_lines (char *prompt_arg, int from_tty, int parse_commands) |
d318976c FN |
1099 | { |
1100 | struct command_line *head, *tail, *next; | |
1101 | struct cleanup *old_chain; | |
1102 | enum command_control_type ret; | |
1103 | enum misc_command_type val; | |
1104 | ||
1105 | control_level = 0; | |
698ba934 DJ |
1106 | |
1107 | if (from_tty && input_from_terminal_p ()) | |
d318976c | 1108 | { |
698ba934 DJ |
1109 | if (deprecated_readline_begin_hook) |
1110 | { | |
1111 | /* Note - intentional to merge messages with no newline */ | |
1112 | (*deprecated_readline_begin_hook) ("%s %s\n", prompt_arg, END_MESSAGE); | |
1113 | } | |
1114 | else | |
1115 | { | |
1116 | printf_unfiltered ("%s\n%s\n", prompt_arg, END_MESSAGE); | |
1117 | gdb_flush (gdb_stdout); | |
1118 | } | |
d318976c FN |
1119 | } |
1120 | ||
1121 | head = tail = NULL; | |
1122 | old_chain = NULL; | |
1123 | ||
1124 | while (1) | |
1125 | { | |
f429d7d0 | 1126 | dont_repeat (); |
311a4e6b | 1127 | val = read_next_line (&next, parse_commands); |
d318976c FN |
1128 | |
1129 | /* Ignore blank lines or comments. */ | |
1130 | if (val == nop_command) | |
1131 | continue; | |
1132 | ||
1133 | if (val == end_command) | |
1134 | { | |
1135 | ret = simple_control; | |
1136 | break; | |
1137 | } | |
1138 | ||
1139 | if (val != ok_command) | |
1140 | { | |
1141 | ret = invalid_control; | |
1142 | break; | |
1143 | } | |
1144 | ||
1145 | if (next->control_type == while_control | |
40c03ae8 | 1146 | || next->control_type == if_control |
d57a3c85 | 1147 | || next->control_type == python_control |
40c03ae8 | 1148 | || next->control_type == commands_control) |
d318976c FN |
1149 | { |
1150 | control_level++; | |
1151 | ret = recurse_read_control_structure (next); | |
1152 | control_level--; | |
1153 | ||
1154 | if (ret == invalid_control) | |
1155 | break; | |
1156 | } | |
1157 | ||
1158 | if (tail) | |
1159 | { | |
1160 | tail->next = next; | |
1161 | } | |
1162 | else | |
1163 | { | |
1164 | head = next; | |
1165 | old_chain = make_cleanup_free_command_lines (&head); | |
1166 | } | |
1167 | tail = next; | |
1168 | } | |
1169 | ||
1170 | dont_repeat (); | |
1171 | ||
1172 | if (head) | |
1173 | { | |
1174 | if (ret != invalid_control) | |
1175 | { | |
1176 | discard_cleanups (old_chain); | |
1177 | } | |
1178 | else | |
1179 | do_cleanups (old_chain); | |
1180 | } | |
1181 | ||
698ba934 | 1182 | if (deprecated_readline_end_hook && from_tty && input_from_terminal_p ()) |
d318976c | 1183 | { |
9a4105ab | 1184 | (*deprecated_readline_end_hook) (); |
d318976c FN |
1185 | } |
1186 | return (head); | |
1187 | } | |
1188 | ||
1189 | /* Free a chain of struct command_line's. */ | |
1190 | ||
1191 | void | |
1192 | free_command_lines (struct command_line **lptr) | |
1193 | { | |
d5b5ac79 AC |
1194 | struct command_line *l = *lptr; |
1195 | struct command_line *next; | |
d318976c FN |
1196 | struct command_line **blist; |
1197 | int i; | |
1198 | ||
1199 | while (l) | |
1200 | { | |
1201 | if (l->body_count > 0) | |
1202 | { | |
1203 | blist = l->body_list; | |
1204 | for (i = 0; i < l->body_count; i++, blist++) | |
1205 | free_command_lines (blist); | |
1206 | } | |
1207 | next = l->next; | |
b8c9b27d KB |
1208 | xfree (l->line); |
1209 | xfree (l); | |
d318976c FN |
1210 | l = next; |
1211 | } | |
0d70f41b | 1212 | *lptr = NULL; |
d318976c FN |
1213 | } |
1214 | ||
1215 | static void | |
1216 | do_free_command_lines_cleanup (void *arg) | |
1217 | { | |
1218 | free_command_lines (arg); | |
1219 | } | |
1220 | ||
6c50ab1c | 1221 | struct cleanup * |
d318976c FN |
1222 | make_cleanup_free_command_lines (struct command_line **arg) |
1223 | { | |
1224 | return make_cleanup (do_free_command_lines_cleanup, arg); | |
1225 | } | |
c2b8ed2c MS |
1226 | |
1227 | struct command_line * | |
1228 | copy_command_lines (struct command_line *cmds) | |
1229 | { | |
1230 | struct command_line *result = NULL; | |
1231 | ||
1232 | if (cmds) | |
1233 | { | |
1234 | result = (struct command_line *) xmalloc (sizeof (struct command_line)); | |
1235 | ||
1236 | result->next = copy_command_lines (cmds->next); | |
1237 | result->line = xstrdup (cmds->line); | |
1238 | result->control_type = cmds->control_type; | |
1239 | result->body_count = cmds->body_count; | |
1240 | if (cmds->body_count > 0) | |
1241 | { | |
1242 | int i; | |
1243 | ||
1244 | result->body_list = (struct command_line **) | |
1245 | xmalloc (sizeof (struct command_line *) * cmds->body_count); | |
1246 | ||
1247 | for (i = 0; i < cmds->body_count; i++) | |
1248 | result->body_list[i] = copy_command_lines (cmds->body_list[i]); | |
1249 | } | |
1250 | else | |
1251 | result->body_list = NULL; | |
1252 | } | |
1253 | ||
1254 | return result; | |
1255 | } | |
d318976c FN |
1256 | \f |
1257 | static void | |
1258 | validate_comname (char *comname) | |
1259 | { | |
d5b5ac79 | 1260 | char *p; |
d318976c FN |
1261 | |
1262 | if (comname == 0) | |
e2e0b3e5 | 1263 | error_no_arg (_("name of command to define")); |
d318976c FN |
1264 | |
1265 | p = comname; | |
1266 | while (*p) | |
1267 | { | |
1268 | if (!isalnum (*p) && *p != '-' && *p != '_') | |
8a3fe4f8 | 1269 | error (_("Junk in argument list: \"%s\""), p); |
d318976c FN |
1270 | p++; |
1271 | } | |
1272 | } | |
1273 | ||
1274 | /* This is just a placeholder in the command data structures. */ | |
1275 | static void | |
1276 | user_defined_command (char *ignore, int from_tty) | |
1277 | { | |
1278 | } | |
1279 | ||
1280 | void | |
1281 | define_command (char *comname, int from_tty) | |
1282 | { | |
1283 | #define MAX_TMPBUF 128 | |
1284 | enum cmd_hook_type | |
1285 | { | |
1286 | CMD_NO_HOOK = 0, | |
1287 | CMD_PRE_HOOK, | |
1288 | CMD_POST_HOOK | |
1289 | }; | |
d5b5ac79 AC |
1290 | struct command_line *cmds; |
1291 | struct cmd_list_element *c, *newc, *oldc, *hookc = 0; | |
d318976c FN |
1292 | char *tem = comname; |
1293 | char *tem2; | |
1294 | char tmpbuf[MAX_TMPBUF]; | |
1295 | int hook_type = CMD_NO_HOOK; | |
1296 | int hook_name_size = 0; | |
1297 | ||
1298 | #define HOOK_STRING "hook-" | |
1299 | #define HOOK_LEN 5 | |
1300 | #define HOOK_POST_STRING "hookpost-" | |
1301 | #define HOOK_POST_LEN 9 | |
1302 | ||
1303 | validate_comname (comname); | |
1304 | ||
1305 | /* Look it up, and verify that we got an exact match. */ | |
1306 | c = lookup_cmd (&tem, cmdlist, "", -1, 1); | |
5cb316ef | 1307 | if (c && strcmp (comname, c->name) != 0) |
d318976c FN |
1308 | c = 0; |
1309 | ||
1310 | if (c) | |
1311 | { | |
ab4e3d93 | 1312 | int q; |
d318976c | 1313 | if (c->class == class_user || c->class == class_alias) |
e2e0b3e5 | 1314 | q = query (_("Redefine command \"%s\"? "), c->name); |
d318976c | 1315 | else |
e2e0b3e5 | 1316 | q = query (_("Really redefine built-in command \"%s\"? "), c->name); |
ab4e3d93 | 1317 | if (!q) |
8a3fe4f8 | 1318 | error (_("Command \"%s\" not redefined."), c->name); |
d318976c FN |
1319 | } |
1320 | ||
1321 | /* If this new command is a hook, then mark the command which it | |
1322 | is hooking. Note that we allow hooking `help' commands, so that | |
1323 | we can hook the `stop' pseudo-command. */ | |
1324 | ||
1325 | if (!strncmp (comname, HOOK_STRING, HOOK_LEN)) | |
1326 | { | |
1327 | hook_type = CMD_PRE_HOOK; | |
1328 | hook_name_size = HOOK_LEN; | |
1329 | } | |
1330 | else if (!strncmp (comname, HOOK_POST_STRING, HOOK_POST_LEN)) | |
1331 | { | |
1332 | hook_type = CMD_POST_HOOK; | |
1333 | hook_name_size = HOOK_POST_LEN; | |
1334 | } | |
1335 | ||
1336 | if (hook_type != CMD_NO_HOOK) | |
1337 | { | |
1338 | /* Look up cmd it hooks, and verify that we got an exact match. */ | |
1339 | tem = comname + hook_name_size; | |
1340 | hookc = lookup_cmd (&tem, cmdlist, "", -1, 0); | |
5cb316ef | 1341 | if (hookc && strcmp (comname + hook_name_size, hookc->name) != 0) |
d318976c FN |
1342 | hookc = 0; |
1343 | if (!hookc) | |
1344 | { | |
8a3fe4f8 | 1345 | warning (_("Your new `%s' command does not hook any existing command."), |
d318976c FN |
1346 | comname); |
1347 | if (!query ("Proceed? ")) | |
8a3fe4f8 | 1348 | error (_("Not confirmed.")); |
d318976c FN |
1349 | } |
1350 | } | |
1351 | ||
1352 | comname = savestring (comname, strlen (comname)); | |
1353 | ||
1354 | /* If the rest of the commands will be case insensitive, this one | |
1355 | should behave in the same manner. */ | |
1356 | for (tem = comname; *tem; tem++) | |
1357 | if (isupper (*tem)) | |
1358 | *tem = tolower (*tem); | |
1359 | ||
1360 | sprintf (tmpbuf, "Type commands for definition of \"%s\".", comname); | |
311a4e6b | 1361 | cmds = read_command_lines (tmpbuf, from_tty, 1); |
d318976c FN |
1362 | |
1363 | if (c && c->class == class_user) | |
1364 | free_command_lines (&c->user_commands); | |
1365 | ||
1366 | newc = add_cmd (comname, class_user, user_defined_command, | |
1367 | (c && c->class == class_user) | |
1368 | ? c->doc : savestring ("User-defined.", 13), &cmdlist); | |
1369 | newc->user_commands = cmds; | |
1370 | ||
1371 | /* If this new command is a hook, then mark both commands as being | |
1372 | tied. */ | |
1373 | if (hookc) | |
1374 | { | |
1375 | switch (hook_type) | |
1376 | { | |
1377 | case CMD_PRE_HOOK: | |
1378 | hookc->hook_pre = newc; /* Target gets hooked. */ | |
1379 | newc->hookee_pre = hookc; /* We are marked as hooking target cmd. */ | |
1380 | break; | |
1381 | case CMD_POST_HOOK: | |
f48ff60a FN |
1382 | hookc->hook_post = newc; /* Target gets hooked. */ |
1383 | newc->hookee_post = hookc; /* We are marked as hooking target cmd. */ | |
d318976c FN |
1384 | break; |
1385 | default: | |
1386 | /* Should never come here as hookc would be 0. */ | |
e2e0b3e5 | 1387 | internal_error (__FILE__, __LINE__, _("bad switch")); |
d318976c FN |
1388 | } |
1389 | } | |
1390 | } | |
1391 | ||
1392 | void | |
1393 | document_command (char *comname, int from_tty) | |
1394 | { | |
1395 | struct command_line *doclines; | |
d5b5ac79 | 1396 | struct cmd_list_element *c; |
d318976c FN |
1397 | char *tem = comname; |
1398 | char tmpbuf[128]; | |
1399 | ||
1400 | validate_comname (comname); | |
1401 | ||
1402 | c = lookup_cmd (&tem, cmdlist, "", 0, 1); | |
1403 | ||
1404 | if (c->class != class_user) | |
8a3fe4f8 | 1405 | error (_("Command \"%s\" is built-in."), comname); |
d318976c FN |
1406 | |
1407 | sprintf (tmpbuf, "Type documentation for \"%s\".", comname); | |
311a4e6b | 1408 | doclines = read_command_lines (tmpbuf, from_tty, 0); |
d318976c FN |
1409 | |
1410 | if (c->doc) | |
b8c9b27d | 1411 | xfree (c->doc); |
d318976c FN |
1412 | |
1413 | { | |
d5b5ac79 AC |
1414 | struct command_line *cl1; |
1415 | int len = 0; | |
d318976c FN |
1416 | |
1417 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1418 | len += strlen (cl1->line) + 1; | |
1419 | ||
1420 | c->doc = (char *) xmalloc (len + 1); | |
1421 | *c->doc = 0; | |
1422 | ||
1423 | for (cl1 = doclines; cl1; cl1 = cl1->next) | |
1424 | { | |
1425 | strcat (c->doc, cl1->line); | |
1426 | if (cl1->next) | |
1427 | strcat (c->doc, "\n"); | |
1428 | } | |
1429 | } | |
1430 | ||
1431 | free_command_lines (&doclines); | |
1432 | } | |
1433 | \f | |
1434 | struct source_cleanup_lines_args | |
1435 | { | |
1436 | int old_line; | |
1437 | char *old_file; | |
d318976c FN |
1438 | }; |
1439 | ||
1440 | static void | |
4efb68b1 | 1441 | source_cleanup_lines (void *args) |
d318976c FN |
1442 | { |
1443 | struct source_cleanup_lines_args *p = | |
1444 | (struct source_cleanup_lines_args *) args; | |
1445 | source_line_number = p->old_line; | |
1446 | source_file_name = p->old_file; | |
d318976c FN |
1447 | } |
1448 | ||
17d92a02 AC |
1449 | struct wrapped_read_command_file_args |
1450 | { | |
1451 | FILE *stream; | |
1452 | }; | |
1453 | ||
1454 | static void | |
1455 | wrapped_read_command_file (struct ui_out *uiout, void *data) | |
1456 | { | |
1457 | struct wrapped_read_command_file_args *args = data; | |
1458 | read_command_file (args->stream); | |
1459 | } | |
1460 | ||
d318976c FN |
1461 | /* Used to implement source_command */ |
1462 | ||
1463 | void | |
1464 | script_from_file (FILE *stream, char *file) | |
1465 | { | |
1466 | struct cleanup *old_cleanups; | |
1467 | struct source_cleanup_lines_args old_lines; | |
1468 | int needed_length; | |
1469 | ||
1470 | if (stream == NULL) | |
e2e0b3e5 | 1471 | internal_error (__FILE__, __LINE__, _("called with NULL file pointer!")); |
d318976c | 1472 | |
7c8a8b04 | 1473 | old_cleanups = make_cleanup_fclose (stream); |
d318976c FN |
1474 | |
1475 | old_lines.old_line = source_line_number; | |
1476 | old_lines.old_file = source_file_name; | |
d318976c FN |
1477 | make_cleanup (source_cleanup_lines, &old_lines); |
1478 | source_line_number = 0; | |
1479 | source_file_name = file; | |
d318976c FN |
1480 | /* This will get set every time we read a line. So it won't stay "" for |
1481 | long. */ | |
1482 | error_pre_print = ""; | |
1483 | ||
17d92a02 | 1484 | { |
71fff37b | 1485 | struct gdb_exception e; |
17d92a02 AC |
1486 | struct wrapped_read_command_file_args args; |
1487 | args.stream = stream; | |
1488 | e = catch_exception (uiout, wrapped_read_command_file, &args, | |
1489 | RETURN_MASK_ERROR); | |
1490 | switch (e.reason) | |
1491 | { | |
1492 | case 0: | |
1493 | break; | |
1494 | case RETURN_ERROR: | |
1495 | /* Re-throw the error, but with the file name information | |
1496 | prepended. */ | |
109c3e39 AC |
1497 | throw_error (e.error, |
1498 | _("%s:%d: Error in sourced command file:\n%s"), | |
637537d0 | 1499 | source_file_name, source_line_number, e.message); |
17d92a02 | 1500 | default: |
e2e0b3e5 | 1501 | internal_error (__FILE__, __LINE__, _("bad reason")); |
17d92a02 AC |
1502 | } |
1503 | } | |
d318976c FN |
1504 | |
1505 | do_cleanups (old_cleanups); | |
1506 | } | |
1507 | ||
1508 | void | |
1509 | show_user_1 (struct cmd_list_element *c, struct ui_file *stream) | |
1510 | { | |
d5b5ac79 | 1511 | struct command_line *cmdlines; |
d318976c FN |
1512 | |
1513 | cmdlines = c->user_commands; | |
1514 | if (!cmdlines) | |
1515 | return; | |
1516 | fputs_filtered ("User command ", stream); | |
1517 | fputs_filtered (c->name, stream); | |
1518 | fputs_filtered (":\n", stream); | |
1519 | ||
d318976c FN |
1520 | print_command_lines (uiout, cmdlines, 1); |
1521 | fputs_filtered ("\n", stream); | |
d318976c FN |
1522 | } |
1523 |