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Commit | Line | Data |
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ccc6cda3 JA |
1 | /* input.c -- character input functions for readline. */ |
2 | ||
ac50fbac | 3 | /* Copyright (C) 1994-2013 Free Software Foundation, Inc. |
ccc6cda3 | 4 | |
3185942a JA |
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. | |
ccc6cda3 | 7 | |
3185942a JA |
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 | |
ccc6cda3 JA |
11 | (at your option) any later version. |
12 | ||
3185942a JA |
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 | |
ccc6cda3 JA |
16 | GNU General Public License for more details. |
17 | ||
3185942a JA |
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 | ||
ccc6cda3 JA |
22 | #define READLINE_LIBRARY |
23 | ||
b80f6443 JA |
24 | #if defined (__TANDEM) |
25 | # include <floss.h> | |
26 | #endif | |
27 | ||
ccc6cda3 JA |
28 | #if defined (HAVE_CONFIG_H) |
29 | # include <config.h> | |
30 | #endif | |
31 | ||
32 | #include <sys/types.h> | |
33 | #include <fcntl.h> | |
34 | #if defined (HAVE_SYS_FILE_H) | |
35 | # include <sys/file.h> | |
36 | #endif /* HAVE_SYS_FILE_H */ | |
37 | ||
38 | #if defined (HAVE_UNISTD_H) | |
39 | # include <unistd.h> | |
40 | #endif /* HAVE_UNISTD_H */ | |
41 | ||
42 | #if defined (HAVE_STDLIB_H) | |
43 | # include <stdlib.h> | |
44 | #else | |
45 | # include "ansi_stdlib.h" | |
46 | #endif /* HAVE_STDLIB_H */ | |
47 | ||
ac50fbac CR |
48 | #include <signal.h> |
49 | ||
0001803f | 50 | #include "posixselect.h" |
ccc6cda3 JA |
51 | |
52 | #if defined (FIONREAD_IN_SYS_IOCTL) | |
53 | # include <sys/ioctl.h> | |
54 | #endif | |
55 | ||
56 | #include <stdio.h> | |
57 | #include <errno.h> | |
58 | ||
59 | #if !defined (errno) | |
60 | extern int errno; | |
61 | #endif /* !errno */ | |
62 | ||
63 | /* System-specific feature definitions and include files. */ | |
64 | #include "rldefs.h" | |
7117c2d2 | 65 | #include "rlmbutil.h" |
ccc6cda3 JA |
66 | |
67 | /* Some standard library routines. */ | |
68 | #include "readline.h" | |
69 | ||
bb70624e JA |
70 | #include "rlprivate.h" |
71 | #include "rlshell.h" | |
72 | #include "xmalloc.h" | |
73 | ||
ccc6cda3 JA |
74 | /* What kind of non-blocking I/O do we have? */ |
75 | #if !defined (O_NDELAY) && defined (O_NONBLOCK) | |
76 | # define O_NDELAY O_NONBLOCK /* Posix style */ | |
77 | #endif | |
78 | ||
ccc6cda3 JA |
79 | /* Non-null means it is a pointer to a function to run while waiting for |
80 | character input. */ | |
28ef6c31 | 81 | rl_hook_func_t *rl_event_hook = (rl_hook_func_t *)NULL; |
ccc6cda3 | 82 | |
ac50fbac CR |
83 | /* A function to call if a read(2) is interrupted by a signal. */ |
84 | rl_hook_func_t *rl_signal_event_hook = (rl_hook_func_t *)NULL; | |
85 | ||
86 | /* A function to replace _rl_input_available for applications using the | |
87 | callback interface. */ | |
88 | rl_hook_func_t *rl_input_available_hook = (rl_hook_func_t *)NULL; | |
89 | ||
28ef6c31 JA |
90 | rl_getc_func_t *rl_getc_function = rl_getc; |
91 | ||
92 | static int _keyboard_input_timeout = 100000; /* 0.1 seconds; it's in usec */ | |
ccc6cda3 | 93 | |
f73dda09 JA |
94 | static int ibuffer_space PARAMS((void)); |
95 | static int rl_get_char PARAMS((int *)); | |
7117c2d2 | 96 | static int rl_gather_tyi PARAMS((void)); |
f73dda09 | 97 | |
ccc6cda3 JA |
98 | /* **************************************************************** */ |
99 | /* */ | |
100 | /* Character Input Buffering */ | |
101 | /* */ | |
102 | /* **************************************************************** */ | |
103 | ||
104 | static int pop_index, push_index; | |
105 | static unsigned char ibuffer[512]; | |
106 | static int ibuffer_len = sizeof (ibuffer) - 1; | |
107 | ||
108 | #define any_typein (push_index != pop_index) | |
109 | ||
110 | int | |
111 | _rl_any_typein () | |
112 | { | |
113 | return any_typein; | |
114 | } | |
115 | ||
ac50fbac CR |
116 | int |
117 | _rl_pushed_input_available () | |
118 | { | |
119 | return (push_index != pop_index); | |
120 | } | |
121 | ||
b72432fd JA |
122 | /* Return the amount of space available in the buffer for stuffing |
123 | characters. */ | |
ccc6cda3 JA |
124 | static int |
125 | ibuffer_space () | |
126 | { | |
127 | if (pop_index > push_index) | |
b72432fd | 128 | return (pop_index - push_index - 1); |
ccc6cda3 JA |
129 | else |
130 | return (ibuffer_len - (push_index - pop_index)); | |
131 | } | |
132 | ||
133 | /* Get a key from the buffer of characters to be read. | |
134 | Return the key in KEY. | |
ac50fbac | 135 | Result is non-zero if there was a key, or 0 if there wasn't. */ |
ccc6cda3 JA |
136 | static int |
137 | rl_get_char (key) | |
138 | int *key; | |
139 | { | |
140 | if (push_index == pop_index) | |
141 | return (0); | |
142 | ||
143 | *key = ibuffer[pop_index++]; | |
f1be666c | 144 | #if 0 |
ccc6cda3 | 145 | if (pop_index >= ibuffer_len) |
f1be666c JA |
146 | #else |
147 | if (pop_index > ibuffer_len) | |
148 | #endif | |
ccc6cda3 JA |
149 | pop_index = 0; |
150 | ||
151 | return (1); | |
152 | } | |
153 | ||
154 | /* Stuff KEY into the *front* of the input buffer. | |
155 | Returns non-zero if successful, zero if there is | |
156 | no space left in the buffer. */ | |
7117c2d2 JA |
157 | int |
158 | _rl_unget_char (key) | |
ccc6cda3 JA |
159 | int key; |
160 | { | |
161 | if (ibuffer_space ()) | |
162 | { | |
163 | pop_index--; | |
164 | if (pop_index < 0) | |
f1be666c | 165 | pop_index = ibuffer_len; |
ccc6cda3 JA |
166 | ibuffer[pop_index] = key; |
167 | return (1); | |
168 | } | |
169 | return (0); | |
170 | } | |
171 | ||
7117c2d2 JA |
172 | /* If a character is available to be read, then read it and stuff it into |
173 | IBUFFER. Otherwise, just return. Returns number of characters read | |
174 | (0 if none available) and -1 on error (EIO). */ | |
175 | static int | |
ccc6cda3 JA |
176 | rl_gather_tyi () |
177 | { | |
ccc6cda3 JA |
178 | int tty; |
179 | register int tem, result; | |
b80f6443 | 180 | int chars_avail, k; |
ccc6cda3 JA |
181 | char input; |
182 | #if defined(HAVE_SELECT) | |
183 | fd_set readfds, exceptfds; | |
184 | struct timeval timeout; | |
185 | #endif | |
186 | ||
0628567a | 187 | chars_avail = 0; |
ccc6cda3 JA |
188 | tty = fileno (rl_instream); |
189 | ||
190 | #if defined (HAVE_SELECT) | |
191 | FD_ZERO (&readfds); | |
192 | FD_ZERO (&exceptfds); | |
193 | FD_SET (tty, &readfds); | |
194 | FD_SET (tty, &exceptfds); | |
0001803f | 195 | USEC_TO_TIMEVAL (_keyboard_input_timeout, timeout); |
7117c2d2 JA |
196 | result = select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout); |
197 | if (result <= 0) | |
198 | return 0; /* Nothing to read. */ | |
ccc6cda3 JA |
199 | #endif |
200 | ||
201 | result = -1; | |
202 | #if defined (FIONREAD) | |
7117c2d2 | 203 | errno = 0; |
ccc6cda3 | 204 | result = ioctl (tty, FIONREAD, &chars_avail); |
7117c2d2 JA |
205 | if (result == -1 && errno == EIO) |
206 | return -1; | |
ccc6cda3 JA |
207 | #endif |
208 | ||
209 | #if defined (O_NDELAY) | |
210 | if (result == -1) | |
211 | { | |
212 | tem = fcntl (tty, F_GETFL, 0); | |
213 | ||
214 | fcntl (tty, F_SETFL, (tem | O_NDELAY)); | |
215 | chars_avail = read (tty, &input, 1); | |
216 | ||
217 | fcntl (tty, F_SETFL, tem); | |
218 | if (chars_avail == -1 && errno == EAGAIN) | |
7117c2d2 | 219 | return 0; |
b80f6443 JA |
220 | if (chars_avail == 0) /* EOF */ |
221 | { | |
222 | rl_stuff_char (EOF); | |
223 | return (0); | |
224 | } | |
ccc6cda3 JA |
225 | } |
226 | #endif /* O_NDELAY */ | |
227 | ||
0628567a JA |
228 | #if defined (__MINGW32__) |
229 | /* Use getch/_kbhit to check for available console input, in the same way | |
230 | that we read it normally. */ | |
231 | chars_avail = isatty (tty) ? _kbhit () : 0; | |
232 | result = 0; | |
233 | #endif | |
234 | ||
ccc6cda3 JA |
235 | /* If there's nothing available, don't waste time trying to read |
236 | something. */ | |
237 | if (chars_avail <= 0) | |
7117c2d2 | 238 | return 0; |
ccc6cda3 JA |
239 | |
240 | tem = ibuffer_space (); | |
241 | ||
242 | if (chars_avail > tem) | |
243 | chars_avail = tem; | |
244 | ||
245 | /* One cannot read all of the available input. I can only read a single | |
246 | character at a time, or else programs which require input can be | |
247 | thwarted. If the buffer is larger than one character, I lose. | |
248 | Damn! */ | |
249 | if (tem < ibuffer_len) | |
250 | chars_avail = 0; | |
251 | ||
252 | if (result != -1) | |
253 | { | |
254 | while (chars_avail--) | |
b80f6443 | 255 | { |
17345e5a | 256 | RL_CHECK_SIGNALS (); |
b80f6443 | 257 | k = (*rl_getc_function) (rl_instream); |
f1be666c JA |
258 | if (rl_stuff_char (k) == 0) |
259 | break; /* some problem; no more room */ | |
b80f6443 JA |
260 | if (k == NEWLINE || k == RETURN) |
261 | break; | |
262 | } | |
ccc6cda3 JA |
263 | } |
264 | else | |
265 | { | |
266 | if (chars_avail) | |
267 | rl_stuff_char (input); | |
268 | } | |
7117c2d2 JA |
269 | |
270 | return 1; | |
ccc6cda3 JA |
271 | } |
272 | ||
28ef6c31 JA |
273 | int |
274 | rl_set_keyboard_input_timeout (u) | |
275 | int u; | |
276 | { | |
277 | int o; | |
278 | ||
279 | o = _keyboard_input_timeout; | |
0628567a | 280 | if (u >= 0) |
28ef6c31 JA |
281 | _keyboard_input_timeout = u; |
282 | return (o); | |
283 | } | |
284 | ||
ccc6cda3 | 285 | /* Is there input available to be read on the readline input file |
7117c2d2 JA |
286 | descriptor? Only works if the system has select(2) or FIONREAD. |
287 | Uses the value of _keyboard_input_timeout as the timeout; if another | |
288 | readline function wants to specify a timeout and not leave it up to | |
289 | the user, it should use _rl_input_queued(timeout_value_in_microseconds) | |
290 | instead. */ | |
ccc6cda3 JA |
291 | int |
292 | _rl_input_available () | |
293 | { | |
294 | #if defined(HAVE_SELECT) | |
295 | fd_set readfds, exceptfds; | |
296 | struct timeval timeout; | |
297 | #endif | |
f73dda09 | 298 | #if !defined (HAVE_SELECT) && defined(FIONREAD) |
ccc6cda3 JA |
299 | int chars_avail; |
300 | #endif | |
301 | int tty; | |
302 | ||
ac50fbac CR |
303 | if (rl_input_available_hook) |
304 | return (*rl_input_available_hook) (); | |
305 | ||
ccc6cda3 JA |
306 | tty = fileno (rl_instream); |
307 | ||
308 | #if defined (HAVE_SELECT) | |
309 | FD_ZERO (&readfds); | |
310 | FD_ZERO (&exceptfds); | |
311 | FD_SET (tty, &readfds); | |
312 | FD_SET (tty, &exceptfds); | |
313 | timeout.tv_sec = 0; | |
28ef6c31 | 314 | timeout.tv_usec = _keyboard_input_timeout; |
ccc6cda3 | 315 | return (select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout) > 0); |
f73dda09 | 316 | #else |
ccc6cda3 JA |
317 | |
318 | #if defined (FIONREAD) | |
319 | if (ioctl (tty, FIONREAD, &chars_avail) == 0) | |
320 | return (chars_avail); | |
f73dda09 JA |
321 | #endif |
322 | ||
0628567a JA |
323 | #endif |
324 | ||
325 | #if defined (__MINGW32__) | |
326 | if (isatty (tty)) | |
327 | return (_kbhit ()); | |
ccc6cda3 JA |
328 | #endif |
329 | ||
330 | return 0; | |
331 | } | |
332 | ||
7117c2d2 JA |
333 | int |
334 | _rl_input_queued (t) | |
335 | int t; | |
336 | { | |
337 | int old_timeout, r; | |
338 | ||
339 | old_timeout = rl_set_keyboard_input_timeout (t); | |
340 | r = _rl_input_available (); | |
341 | rl_set_keyboard_input_timeout (old_timeout); | |
342 | return r; | |
343 | } | |
344 | ||
ccc6cda3 JA |
345 | void |
346 | _rl_insert_typein (c) | |
347 | int c; | |
348 | { | |
349 | int key, t, i; | |
350 | char *string; | |
351 | ||
352 | i = key = 0; | |
f73dda09 | 353 | string = (char *)xmalloc (ibuffer_len + 1); |
ccc6cda3 JA |
354 | string[i++] = (char) c; |
355 | ||
356 | while ((t = rl_get_char (&key)) && | |
357 | _rl_keymap[key].type == ISFUNC && | |
358 | _rl_keymap[key].function == rl_insert) | |
359 | string[i++] = key; | |
360 | ||
361 | if (t) | |
7117c2d2 | 362 | _rl_unget_char (key); |
ccc6cda3 JA |
363 | |
364 | string[i] = '\0'; | |
365 | rl_insert_text (string); | |
3185942a | 366 | xfree (string); |
ccc6cda3 JA |
367 | } |
368 | ||
b72432fd JA |
369 | /* Add KEY to the buffer of characters to be read. Returns 1 if the |
370 | character was stuffed correctly; 0 otherwise. */ | |
371 | int | |
372 | rl_stuff_char (key) | |
373 | int key; | |
374 | { | |
375 | if (ibuffer_space () == 0) | |
376 | return 0; | |
377 | ||
378 | if (key == EOF) | |
379 | { | |
380 | key = NEWLINE; | |
381 | rl_pending_input = EOF; | |
28ef6c31 | 382 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
b72432fd JA |
383 | } |
384 | ibuffer[push_index++] = key; | |
f1be666c | 385 | #if 0 |
b72432fd | 386 | if (push_index >= ibuffer_len) |
f1be666c JA |
387 | #else |
388 | if (push_index > ibuffer_len) | |
389 | #endif | |
b72432fd JA |
390 | push_index = 0; |
391 | ||
392 | return 1; | |
393 | } | |
394 | ||
395 | /* Make C be the next command to be executed. */ | |
396 | int | |
397 | rl_execute_next (c) | |
398 | int c; | |
399 | { | |
400 | rl_pending_input = c; | |
28ef6c31 JA |
401 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
402 | return 0; | |
403 | } | |
404 | ||
405 | /* Clear any pending input pushed with rl_execute_next() */ | |
406 | int | |
407 | rl_clear_pending_input () | |
408 | { | |
409 | rl_pending_input = 0; | |
410 | RL_UNSETSTATE (RL_STATE_INPUTPENDING); | |
b72432fd JA |
411 | return 0; |
412 | } | |
413 | ||
ccc6cda3 JA |
414 | /* **************************************************************** */ |
415 | /* */ | |
416 | /* Character Input */ | |
417 | /* */ | |
418 | /* **************************************************************** */ | |
419 | ||
420 | /* Read a key, including pending input. */ | |
421 | int | |
422 | rl_read_key () | |
423 | { | |
7a127e74 | 424 | int c, r; |
ccc6cda3 | 425 | |
ccc6cda3 JA |
426 | if (rl_pending_input) |
427 | { | |
428 | c = rl_pending_input; | |
28ef6c31 | 429 | rl_clear_pending_input (); |
ccc6cda3 JA |
430 | } |
431 | else | |
432 | { | |
433 | /* If input is coming from a macro, then use that. */ | |
434 | if (c = _rl_next_macro_key ()) | |
435 | return (c); | |
436 | ||
437 | /* If the user has an event function, then call it periodically. */ | |
438 | if (rl_event_hook) | |
439 | { | |
495aee44 | 440 | while (rl_event_hook) |
ccc6cda3 | 441 | { |
7a127e74 CR |
442 | if (rl_get_char (&c) != 0) |
443 | break; | |
444 | ||
445 | if ((r = rl_gather_tyi ()) < 0) /* XXX - EIO */ | |
7117c2d2 JA |
446 | { |
447 | rl_done = 1; | |
448 | return ('\n'); | |
449 | } | |
ac50fbac | 450 | else if (r > 0) /* read something */ |
7a127e74 CR |
451 | continue; |
452 | ||
495aee44 | 453 | RL_CHECK_SIGNALS (); |
495aee44 CR |
454 | if (rl_done) /* XXX - experimental */ |
455 | return ('\n'); | |
456 | (*rl_event_hook) (); | |
ccc6cda3 JA |
457 | } |
458 | } | |
459 | else | |
460 | { | |
461 | if (rl_get_char (&c) == 0) | |
462 | c = (*rl_getc_function) (rl_instream); | |
ac50fbac | 463 | /* fprintf(stderr, "rl_read_key: calling RL_CHECK_SIGNALS: _rl_caught_signal = %d", _rl_caught_signal); */ |
17345e5a | 464 | RL_CHECK_SIGNALS (); |
ccc6cda3 JA |
465 | } |
466 | } | |
467 | ||
468 | return (c); | |
469 | } | |
470 | ||
471 | int | |
472 | rl_getc (stream) | |
473 | FILE *stream; | |
474 | { | |
bb70624e | 475 | int result; |
ccc6cda3 JA |
476 | unsigned char c; |
477 | ||
ccc6cda3 JA |
478 | while (1) |
479 | { | |
17345e5a JA |
480 | RL_CHECK_SIGNALS (); |
481 | ||
ac50fbac CR |
482 | /* We know at this point that _rl_caught_signal == 0 */ |
483 | ||
95732b49 JA |
484 | #if defined (__MINGW32__) |
485 | if (isatty (fileno (stream))) | |
486 | return (getch ()); | |
487 | #endif | |
ccc6cda3 JA |
488 | result = read (fileno (stream), &c, sizeof (unsigned char)); |
489 | ||
490 | if (result == sizeof (unsigned char)) | |
491 | return (c); | |
492 | ||
493 | /* If zero characters are returned, then the file that we are | |
494 | reading from is empty! Return EOF in that case. */ | |
495 | if (result == 0) | |
496 | return (EOF); | |
497 | ||
b72432fd JA |
498 | #if defined (__BEOS__) |
499 | if (errno == EINTR) | |
500 | continue; | |
501 | #endif | |
502 | ||
ccc6cda3 | 503 | #if defined (EWOULDBLOCK) |
bb70624e JA |
504 | # define X_EWOULDBLOCK EWOULDBLOCK |
505 | #else | |
506 | # define X_EWOULDBLOCK -99 | |
507 | #endif | |
508 | ||
509 | #if defined (EAGAIN) | |
510 | # define X_EAGAIN EAGAIN | |
511 | #else | |
512 | # define X_EAGAIN -99 | |
513 | #endif | |
514 | ||
515 | if (errno == X_EWOULDBLOCK || errno == X_EAGAIN) | |
ccc6cda3 | 516 | { |
28ef6c31 | 517 | if (sh_unset_nodelay_mode (fileno (stream)) < 0) |
ccc6cda3 | 518 | return (EOF); |
ccc6cda3 JA |
519 | continue; |
520 | } | |
ccc6cda3 | 521 | |
bb70624e JA |
522 | #undef X_EWOULDBLOCK |
523 | #undef X_EAGAIN | |
ccc6cda3 | 524 | |
ac50fbac CR |
525 | /* fprintf(stderr, "rl_getc: result = %d errno = %d\n", result, errno); */ |
526 | ||
527 | /* If the error that we received was EINTR, then try again, | |
528 | this is simply an interrupted system call to read (). We allow | |
529 | the read to be interrupted if we caught SIGHUP or SIGTERM (but | |
530 | not SIGINT; let the signal handler deal with that), but if the | |
531 | application sets an event hook, call it for other signals. | |
532 | Otherwise (not EINTR), some error occurred, also signifying EOF. */ | |
ccc6cda3 | 533 | if (errno != EINTR) |
0628567a | 534 | return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); |
ac50fbac CR |
535 | else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM) |
536 | return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); | |
537 | else if (_rl_caught_signal == SIGINT || _rl_caught_signal == SIGQUIT) | |
538 | RL_CHECK_SIGNALS (); | |
539 | ||
540 | if (rl_signal_event_hook) | |
541 | (*rl_signal_event_hook) (); | |
ccc6cda3 JA |
542 | } |
543 | } | |
7117c2d2 JA |
544 | |
545 | #if defined (HANDLE_MULTIBYTE) | |
546 | /* read multibyte char */ | |
547 | int | |
548 | _rl_read_mbchar (mbchar, size) | |
549 | char *mbchar; | |
550 | int size; | |
551 | { | |
f1be666c | 552 | int mb_len, c; |
7117c2d2 JA |
553 | size_t mbchar_bytes_length; |
554 | wchar_t wc; | |
555 | mbstate_t ps, ps_back; | |
556 | ||
557 | memset(&ps, 0, sizeof (mbstate_t)); | |
558 | memset(&ps_back, 0, sizeof (mbstate_t)); | |
f1be666c JA |
559 | |
560 | mb_len = 0; | |
7117c2d2 JA |
561 | while (mb_len < size) |
562 | { | |
563 | RL_SETSTATE(RL_STATE_MOREINPUT); | |
f1be666c | 564 | c = rl_read_key (); |
7117c2d2 JA |
565 | RL_UNSETSTATE(RL_STATE_MOREINPUT); |
566 | ||
f1be666c JA |
567 | if (c < 0) |
568 | break; | |
569 | ||
570 | mbchar[mb_len++] = c; | |
571 | ||
7117c2d2 JA |
572 | mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps); |
573 | if (mbchar_bytes_length == (size_t)(-1)) | |
574 | break; /* invalid byte sequence for the current locale */ | |
575 | else if (mbchar_bytes_length == (size_t)(-2)) | |
576 | { | |
577 | /* shorted bytes */ | |
578 | ps = ps_back; | |
579 | continue; | |
580 | } | |
95732b49 JA |
581 | else if (mbchar_bytes_length == 0) |
582 | { | |
583 | mbchar[0] = '\0'; /* null wide character */ | |
584 | mb_len = 1; | |
585 | break; | |
586 | } | |
7117c2d2 JA |
587 | else if (mbchar_bytes_length > (size_t)(0)) |
588 | break; | |
589 | } | |
590 | ||
591 | return mb_len; | |
592 | } | |
593 | ||
594 | /* Read a multibyte-character string whose first character is FIRST into | |
0628567a | 595 | the buffer MB of length MLEN. Returns the last character read, which |
7117c2d2 JA |
596 | may be FIRST. Used by the search functions, among others. Very similar |
597 | to _rl_read_mbchar. */ | |
598 | int | |
0628567a | 599 | _rl_read_mbstring (first, mb, mlen) |
7117c2d2 JA |
600 | int first; |
601 | char *mb; | |
0628567a | 602 | int mlen; |
7117c2d2 JA |
603 | { |
604 | int i, c; | |
605 | mbstate_t ps; | |
606 | ||
607 | c = first; | |
0628567a | 608 | memset (mb, 0, mlen); |
f1be666c | 609 | for (i = 0; c >= 0 && i < mlen; i++) |
7117c2d2 JA |
610 | { |
611 | mb[i] = (char)c; | |
612 | memset (&ps, 0, sizeof (mbstate_t)); | |
613 | if (_rl_get_char_len (mb, &ps) == -2) | |
614 | { | |
615 | /* Read more for multibyte character */ | |
616 | RL_SETSTATE (RL_STATE_MOREINPUT); | |
617 | c = rl_read_key (); | |
618 | RL_UNSETSTATE (RL_STATE_MOREINPUT); | |
619 | } | |
620 | else | |
621 | break; | |
622 | } | |
623 | return c; | |
624 | } | |
625 | #endif /* HANDLE_MULTIBYTE */ |