Commit | Line | Data |
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d60d9f65 SS |
1 | /* util.c -- readline utility functions */ |
2 | ||
5836a818 | 3 | /* Copyright (C) 1987-2010 Free Software Foundation, Inc. |
d60d9f65 | 4 | |
cc88a640 JK |
5 | This file is part of the GNU Readline Library (Readline), a library |
6 | for reading lines of text with interactive input and history editing. | |
d60d9f65 | 7 | |
cc88a640 JK |
8 | Readline is free software: you can redistribute it and/or modify |
9 | it under the terms of the GNU General Public License as published by | |
10 | the Free Software Foundation, either version 3 of the License, or | |
d60d9f65 SS |
11 | (at your option) any later version. |
12 | ||
cc88a640 JK |
13 | Readline is distributed in the hope that it will be useful, |
14 | but WITHOUT ANY WARRANTY; without even the implied warranty of | |
15 | MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the | |
d60d9f65 SS |
16 | GNU General Public License for more details. |
17 | ||
cc88a640 JK |
18 | You should have received a copy of the GNU General Public License |
19 | along with Readline. If not, see <http://www.gnu.org/licenses/>. | |
20 | */ | |
21 | ||
d60d9f65 SS |
22 | #define READLINE_LIBRARY |
23 | ||
24 | #if defined (HAVE_CONFIG_H) | |
25 | # include <config.h> | |
26 | #endif | |
27 | ||
28 | #include <sys/types.h> | |
29 | #include <fcntl.h> | |
30 | #include "posixjmp.h" | |
31 | ||
32 | #if defined (HAVE_UNISTD_H) | |
33 | # include <unistd.h> /* for _POSIX_VERSION */ | |
34 | #endif /* HAVE_UNISTD_H */ | |
35 | ||
36 | #if defined (HAVE_STDLIB_H) | |
37 | # include <stdlib.h> | |
38 | #else | |
39 | # include "ansi_stdlib.h" | |
40 | #endif /* HAVE_STDLIB_H */ | |
41 | ||
42 | #include <stdio.h> | |
43 | #include <ctype.h> | |
44 | ||
45 | /* System-specific feature definitions and include files. */ | |
46 | #include "rldefs.h" | |
5bdf8622 | 47 | #include "rlmbutil.h" |
d60d9f65 SS |
48 | |
49 | #if defined (TIOCSTAT_IN_SYS_IOCTL) | |
50 | # include <sys/ioctl.h> | |
51 | #endif /* TIOCSTAT_IN_SYS_IOCTL */ | |
52 | ||
53 | /* Some standard library routines. */ | |
54 | #include "readline.h" | |
55 | ||
1b17e766 EZ |
56 | #include "rlprivate.h" |
57 | #include "xmalloc.h" | |
7f3c5ec8 | 58 | #include "rlshell.h" |
d60d9f65 | 59 | |
d60d9f65 SS |
60 | /* **************************************************************** */ |
61 | /* */ | |
62 | /* Utility Functions */ | |
63 | /* */ | |
64 | /* **************************************************************** */ | |
65 | ||
66 | /* Return 0 if C is not a member of the class of characters that belong | |
67 | in words, or 1 if it is. */ | |
68 | ||
69 | int _rl_allow_pathname_alphabetic_chars = 0; | |
cc88a640 | 70 | static const char * const pathname_alphabetic_chars = "/-_=~.#$"; |
d60d9f65 SS |
71 | |
72 | int | |
9255ee31 | 73 | rl_alphabetic (c) |
d60d9f65 SS |
74 | int c; |
75 | { | |
76 | if (ALPHABETIC (c)) | |
77 | return (1); | |
78 | ||
79 | return (_rl_allow_pathname_alphabetic_chars && | |
80 | strchr (pathname_alphabetic_chars, c) != NULL); | |
81 | } | |
82 | ||
5bdf8622 DJ |
83 | #if defined (HANDLE_MULTIBYTE) |
84 | int | |
cc88a640 | 85 | _rl_walphabetic (wchar_t wc) |
5bdf8622 DJ |
86 | { |
87 | int c; | |
88 | ||
89 | if (iswalnum (wc)) | |
90 | return (1); | |
91 | ||
92 | c = wc & 0177; | |
93 | return (_rl_allow_pathname_alphabetic_chars && | |
94 | strchr (pathname_alphabetic_chars, c) != NULL); | |
95 | } | |
96 | #endif | |
97 | ||
d60d9f65 SS |
98 | /* How to abort things. */ |
99 | int | |
100 | _rl_abort_internal () | |
101 | { | |
9255ee31 | 102 | rl_ding (); |
d60d9f65 | 103 | rl_clear_message (); |
5bdf8622 | 104 | _rl_reset_argument (); |
9255ee31 | 105 | rl_clear_pending_input (); |
d60d9f65 | 106 | |
9255ee31 EZ |
107 | RL_UNSETSTATE (RL_STATE_MACRODEF); |
108 | while (rl_executing_macro) | |
d60d9f65 SS |
109 | _rl_pop_executing_macro (); |
110 | ||
9255ee31 | 111 | rl_last_func = (rl_command_func_t *)NULL; |
5836a818 | 112 | longjmp (_rl_top_level, 1); |
d60d9f65 SS |
113 | return (0); |
114 | } | |
115 | ||
116 | int | |
117 | rl_abort (count, key) | |
118 | int count, key; | |
119 | { | |
120 | return (_rl_abort_internal ()); | |
121 | } | |
122 | ||
cc88a640 JK |
123 | int |
124 | _rl_null_function (count, key) | |
125 | int count, key; | |
126 | { | |
127 | return 0; | |
128 | } | |
129 | ||
d60d9f65 SS |
130 | int |
131 | rl_tty_status (count, key) | |
132 | int count, key; | |
133 | { | |
134 | #if defined (TIOCSTAT) | |
135 | ioctl (1, TIOCSTAT, (char *)0); | |
c862e87b | 136 | rl_refresh_line (count, key); |
d60d9f65 | 137 | #else |
9255ee31 | 138 | rl_ding (); |
d60d9f65 SS |
139 | #endif |
140 | return 0; | |
141 | } | |
142 | ||
143 | /* Return a copy of the string between FROM and TO. | |
144 | FROM is inclusive, TO is not. */ | |
145 | char * | |
146 | rl_copy_text (from, to) | |
147 | int from, to; | |
148 | { | |
149 | register int length; | |
150 | char *copy; | |
151 | ||
152 | /* Fix it if the caller is confused. */ | |
153 | if (from > to) | |
154 | SWAP (from, to); | |
155 | ||
156 | length = to - from; | |
9255ee31 | 157 | copy = (char *)xmalloc (1 + length); |
d60d9f65 SS |
158 | strncpy (copy, rl_line_buffer + from, length); |
159 | copy[length] = '\0'; | |
160 | return (copy); | |
161 | } | |
162 | ||
163 | /* Increase the size of RL_LINE_BUFFER until it has enough space to hold | |
164 | LEN characters. */ | |
165 | void | |
166 | rl_extend_line_buffer (len) | |
167 | int len; | |
168 | { | |
169 | while (len >= rl_line_buffer_len) | |
170 | { | |
171 | rl_line_buffer_len += DEFAULT_BUFFER_SIZE; | |
9255ee31 | 172 | rl_line_buffer = (char *)xrealloc (rl_line_buffer, rl_line_buffer_len); |
d60d9f65 SS |
173 | } |
174 | ||
175 | _rl_set_the_line (); | |
176 | } | |
177 | ||
178 | ||
179 | /* A function for simple tilde expansion. */ | |
180 | int | |
181 | rl_tilde_expand (ignore, key) | |
182 | int ignore, key; | |
183 | { | |
184 | register int start, end; | |
185 | char *homedir, *temp; | |
186 | int len; | |
187 | ||
188 | end = rl_point; | |
189 | start = end - 1; | |
190 | ||
191 | if (rl_point == rl_end && rl_line_buffer[rl_point] == '~') | |
192 | { | |
193 | homedir = tilde_expand ("~"); | |
194 | _rl_replace_text (homedir, start, end); | |
cc88a640 | 195 | xfree (homedir); |
d60d9f65 SS |
196 | return (0); |
197 | } | |
198 | else if (rl_line_buffer[start] != '~') | |
199 | { | |
200 | for (; !whitespace (rl_line_buffer[start]) && start >= 0; start--) | |
201 | ; | |
202 | start++; | |
203 | } | |
204 | ||
205 | end = start; | |
206 | do | |
207 | end++; | |
208 | while (whitespace (rl_line_buffer[end]) == 0 && end < rl_end); | |
209 | ||
210 | if (whitespace (rl_line_buffer[end]) || end >= rl_end) | |
211 | end--; | |
212 | ||
213 | /* If the first character of the current word is a tilde, perform | |
214 | tilde expansion and insert the result. If not a tilde, do | |
215 | nothing. */ | |
216 | if (rl_line_buffer[start] == '~') | |
217 | { | |
218 | len = end - start + 1; | |
9255ee31 | 219 | temp = (char *)xmalloc (len + 1); |
d60d9f65 SS |
220 | strncpy (temp, rl_line_buffer + start, len); |
221 | temp[len] = '\0'; | |
222 | homedir = tilde_expand (temp); | |
cc88a640 | 223 | xfree (temp); |
d60d9f65 SS |
224 | |
225 | _rl_replace_text (homedir, start, end); | |
cc88a640 | 226 | xfree (homedir); |
d60d9f65 SS |
227 | } |
228 | ||
229 | return (0); | |
230 | } | |
231 | ||
cc88a640 JK |
232 | #if defined (USE_VARARGS) |
233 | void | |
234 | #if defined (PREFER_STDARG) | |
235 | _rl_ttymsg (const char *format, ...) | |
236 | #else | |
237 | _rl_ttymsg (va_alist) | |
238 | va_dcl | |
239 | #endif | |
240 | { | |
241 | va_list args; | |
242 | #if defined (PREFER_VARARGS) | |
243 | char *format; | |
244 | #endif | |
245 | ||
246 | #if defined (PREFER_STDARG) | |
247 | va_start (args, format); | |
248 | #else | |
249 | va_start (args); | |
250 | format = va_arg (args, char *); | |
251 | #endif | |
252 | ||
253 | fprintf (stderr, "readline: "); | |
254 | vfprintf (stderr, format, args); | |
255 | fprintf (stderr, "\n"); | |
256 | fflush (stderr); | |
257 | ||
258 | va_end (args); | |
259 | ||
260 | rl_forced_update_display (); | |
261 | } | |
262 | ||
263 | void | |
264 | #if defined (PREFER_STDARG) | |
265 | _rl_errmsg (const char *format, ...) | |
266 | #else | |
267 | _rl_errmsg (va_alist) | |
268 | va_dcl | |
269 | #endif | |
270 | { | |
271 | va_list args; | |
272 | #if defined (PREFER_VARARGS) | |
273 | char *format; | |
274 | #endif | |
275 | ||
276 | #if defined (PREFER_STDARG) | |
277 | va_start (args, format); | |
278 | #else | |
279 | va_start (args); | |
280 | format = va_arg (args, char *); | |
281 | #endif | |
282 | ||
283 | fprintf (stderr, "readline: "); | |
284 | vfprintf (stderr, format, args); | |
285 | fprintf (stderr, "\n"); | |
286 | fflush (stderr); | |
287 | ||
288 | va_end (args); | |
289 | } | |
290 | ||
291 | #else /* !USE_VARARGS */ | |
292 | void | |
293 | _rl_ttymsg (format, arg1, arg2) | |
294 | char *format; | |
295 | { | |
296 | fprintf (stderr, "readline: "); | |
297 | fprintf (stderr, format, arg1, arg2); | |
298 | fprintf (stderr, "\n"); | |
299 | ||
300 | rl_forced_update_display (); | |
301 | } | |
302 | ||
303 | void | |
304 | _rl_errmsg (format, arg1, arg2) | |
305 | char *format; | |
306 | { | |
307 | fprintf (stderr, "readline: "); | |
308 | fprintf (stderr, format, arg1, arg2); | |
309 | fprintf (stderr, "\n"); | |
310 | } | |
311 | #endif /* !USE_VARARGS */ | |
312 | ||
d60d9f65 SS |
313 | /* **************************************************************** */ |
314 | /* */ | |
315 | /* String Utility Functions */ | |
316 | /* */ | |
317 | /* **************************************************************** */ | |
318 | ||
319 | /* Determine if s2 occurs in s1. If so, return a pointer to the | |
320 | match in s1. The compare is case insensitive. */ | |
321 | char * | |
322 | _rl_strindex (s1, s2) | |
9255ee31 | 323 | register const char *s1, *s2; |
d60d9f65 SS |
324 | { |
325 | register int i, l, len; | |
326 | ||
327 | for (i = 0, l = strlen (s2), len = strlen (s1); (len - i) >= l; i++) | |
328 | if (_rl_strnicmp (s1 + i, s2, l) == 0) | |
9255ee31 | 329 | return ((char *) (s1 + i)); |
d60d9f65 SS |
330 | return ((char *)NULL); |
331 | } | |
332 | ||
9255ee31 EZ |
333 | #ifndef HAVE_STRPBRK |
334 | /* Find the first occurrence in STRING1 of any character from STRING2. | |
335 | Return a pointer to the character in STRING1. */ | |
336 | char * | |
337 | _rl_strpbrk (string1, string2) | |
338 | const char *string1, *string2; | |
339 | { | |
340 | register const char *scan; | |
341 | #if defined (HANDLE_MULTIBYTE) | |
342 | mbstate_t ps; | |
343 | register int i, v; | |
344 | ||
345 | memset (&ps, 0, sizeof (mbstate_t)); | |
346 | #endif | |
347 | ||
348 | for (; *string1; string1++) | |
349 | { | |
350 | for (scan = string2; *scan; scan++) | |
351 | { | |
352 | if (*string1 == *scan) | |
353 | return ((char *)string1); | |
354 | } | |
355 | #if defined (HANDLE_MULTIBYTE) | |
356 | if (MB_CUR_MAX > 1 && rl_byte_oriented == 0) | |
357 | { | |
358 | v = _rl_get_char_len (string1, &ps); | |
359 | if (v > 1) | |
5bdf8622 | 360 | string1 += v - 1; /* -1 to account for auto-increment in loop */ |
9255ee31 EZ |
361 | } |
362 | #endif | |
363 | } | |
364 | return ((char *)NULL); | |
365 | } | |
366 | #endif | |
367 | ||
d60d9f65 SS |
368 | #if !defined (HAVE_STRCASECMP) |
369 | /* Compare at most COUNT characters from string1 to string2. Case | |
cc88a640 | 370 | doesn't matter (strncasecmp). */ |
d60d9f65 SS |
371 | int |
372 | _rl_strnicmp (string1, string2, count) | |
5836a818 | 373 | char *string1, *string2; |
d60d9f65 SS |
374 | int count; |
375 | { | |
5836a818 PP |
376 | register char *s1, *s2; |
377 | int d; | |
d60d9f65 | 378 | |
cc88a640 JK |
379 | if (count <= 0 || (string1 == string2)) |
380 | return 0; | |
381 | ||
382 | s1 = string1; | |
383 | s2 = string2; | |
384 | do | |
d60d9f65 | 385 | { |
cc88a640 JK |
386 | d = _rl_to_lower (*s1) - _rl_to_lower (*s2); /* XXX - cast to unsigned char? */ |
387 | if (d != 0) | |
388 | return d; | |
389 | if (*s1++ == '\0') | |
d60d9f65 | 390 | break; |
cc88a640 | 391 | s2++; |
d60d9f65 | 392 | } |
ab3a7f8f | 393 | while (--count != 0); |
cc88a640 JK |
394 | |
395 | return (0); | |
d60d9f65 SS |
396 | } |
397 | ||
cc88a640 | 398 | /* strcmp (), but caseless (strcasecmp). */ |
d60d9f65 SS |
399 | int |
400 | _rl_stricmp (string1, string2) | |
5836a818 | 401 | char *string1, *string2; |
d60d9f65 | 402 | { |
5836a818 PP |
403 | register char *s1, *s2; |
404 | int d; | |
cc88a640 JK |
405 | |
406 | s1 = string1; | |
407 | s2 = string2; | |
d60d9f65 | 408 | |
cc88a640 JK |
409 | if (s1 == s2) |
410 | return 0; | |
411 | ||
412 | while ((d = _rl_to_lower (*s1) - _rl_to_lower (*s2)) == 0) | |
d60d9f65 | 413 | { |
cc88a640 JK |
414 | if (*s1++ == '\0') |
415 | return 0; | |
416 | s2++; | |
d60d9f65 | 417 | } |
cc88a640 JK |
418 | |
419 | return (d); | |
d60d9f65 SS |
420 | } |
421 | #endif /* !HAVE_STRCASECMP */ | |
422 | ||
423 | /* Stupid comparison routine for qsort () ing strings. */ | |
424 | int | |
425 | _rl_qsort_string_compare (s1, s2) | |
426 | char **s1, **s2; | |
427 | { | |
428 | #if defined (HAVE_STRCOLL) | |
429 | return (strcoll (*s1, *s2)); | |
430 | #else | |
431 | int result; | |
432 | ||
433 | result = **s1 - **s2; | |
434 | if (result == 0) | |
435 | result = strcmp (*s1, *s2); | |
436 | ||
437 | return result; | |
438 | #endif | |
439 | } | |
440 | ||
9255ee31 EZ |
441 | /* Function equivalents for the macros defined in chardefs.h. */ |
442 | #define FUNCTION_FOR_MACRO(f) int (f) (c) int c; { return f (c); } | |
d60d9f65 | 443 | |
9255ee31 EZ |
444 | FUNCTION_FOR_MACRO (_rl_digit_p) |
445 | FUNCTION_FOR_MACRO (_rl_digit_value) | |
446 | FUNCTION_FOR_MACRO (_rl_lowercase_p) | |
447 | FUNCTION_FOR_MACRO (_rl_pure_alphabetic) | |
448 | FUNCTION_FOR_MACRO (_rl_to_lower) | |
449 | FUNCTION_FOR_MACRO (_rl_to_upper) | |
450 | FUNCTION_FOR_MACRO (_rl_uppercase_p) | |
d60d9f65 | 451 | |
cc88a640 JK |
452 | /* A convenience function, to force memory deallocation to be performed |
453 | by readline. DLLs on Windows apparently require this. */ | |
454 | void | |
455 | rl_free (mem) | |
456 | void *mem; | |
457 | { | |
458 | if (mem) | |
459 | free (mem); | |
460 | } | |
461 | ||
d60d9f65 SS |
462 | /* Backwards compatibility, now that savestring has been removed from |
463 | all `public' readline header files. */ | |
464 | #undef _rl_savestring | |
465 | char * | |
466 | _rl_savestring (s) | |
9255ee31 | 467 | const char *s; |
d60d9f65 | 468 | { |
9255ee31 | 469 | return (strcpy ((char *)xmalloc (1 + (int)strlen (s)), (s))); |
d60d9f65 | 470 | } |
cc88a640 JK |
471 | |
472 | #if defined (USE_VARARGS) | |
473 | static FILE *_rl_tracefp; | |
474 | ||
475 | void | |
476 | #if defined (PREFER_STDARG) | |
477 | _rl_trace (const char *format, ...) | |
478 | #else | |
479 | _rl_trace (va_alist) | |
480 | va_dcl | |
481 | #endif | |
482 | { | |
483 | va_list args; | |
484 | #if defined (PREFER_VARARGS) | |
485 | char *format; | |
486 | #endif | |
487 | ||
488 | #if defined (PREFER_STDARG) | |
489 | va_start (args, format); | |
490 | #else | |
491 | va_start (args); | |
492 | format = va_arg (args, char *); | |
493 | #endif | |
494 | ||
495 | if (_rl_tracefp == 0) | |
496 | _rl_tropen (); | |
497 | vfprintf (_rl_tracefp, format, args); | |
498 | fprintf (_rl_tracefp, "\n"); | |
499 | fflush (_rl_tracefp); | |
500 | ||
501 | va_end (args); | |
502 | } | |
503 | ||
504 | int | |
505 | _rl_tropen () | |
506 | { | |
5836a818 | 507 | char fnbuf[128]; |
cc88a640 JK |
508 | |
509 | if (_rl_tracefp) | |
510 | fclose (_rl_tracefp); | |
7f3c5ec8 EZ |
511 | #if defined (_WIN32) && !defined (__CYGWIN__) |
512 | /* Windows doesn't have /var/tmp, so open the trace file in the | |
513 | user's temporary directory instead. */ | |
514 | sprintf (fnbuf, "%s/rltrace.%ld", | |
515 | (sh_get_env_value ("TEMP") | |
516 | ? sh_get_env_value ("TEMP") | |
517 | : "."), | |
518 | getpid()); | |
519 | #else | |
5836a818 | 520 | sprintf (fnbuf, "/var/tmp/rltrace.%ld", getpid()); |
7f3c5ec8 | 521 | #endif |
cc88a640 JK |
522 | unlink(fnbuf); |
523 | _rl_tracefp = fopen (fnbuf, "w+"); | |
524 | return _rl_tracefp != 0; | |
525 | } | |
526 | ||
527 | int | |
528 | _rl_trclose () | |
529 | { | |
530 | int r; | |
531 | ||
532 | r = fclose (_rl_tracefp); | |
533 | _rl_tracefp = 0; | |
534 | return r; | |
535 | } | |
536 | ||
537 | #endif |