Commit | Line | Data |
---|---|---|
d60d9f65 SS |
1 | /* input.c -- character input functions for readline. */ |
2 | ||
5836a818 | 3 | /* Copyright (C) 1994-2010 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 | ||
5bdf8622 DJ |
24 | #if defined (__TANDEM) |
25 | # include <floss.h> | |
26 | #endif | |
27 | ||
d60d9f65 SS |
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 | ||
cc88a640 | 48 | #include "posixselect.h" |
d60d9f65 SS |
49 | |
50 | #if defined (FIONREAD_IN_SYS_IOCTL) | |
51 | # include <sys/ioctl.h> | |
52 | #endif | |
53 | ||
54 | #include <stdio.h> | |
55 | #include <errno.h> | |
56 | ||
57 | #if !defined (errno) | |
58 | extern int errno; | |
59 | #endif /* !errno */ | |
60 | ||
61 | /* System-specific feature definitions and include files. */ | |
62 | #include "rldefs.h" | |
9255ee31 | 63 | #include "rlmbutil.h" |
d60d9f65 SS |
64 | |
65 | /* Some standard library routines. */ | |
66 | #include "readline.h" | |
67 | ||
1b17e766 EZ |
68 | #include "rlprivate.h" |
69 | #include "rlshell.h" | |
70 | #include "xmalloc.h" | |
71 | ||
d60d9f65 SS |
72 | /* What kind of non-blocking I/O do we have? */ |
73 | #if !defined (O_NDELAY) && defined (O_NONBLOCK) | |
74 | # define O_NDELAY O_NONBLOCK /* Posix style */ | |
75 | #endif | |
76 | ||
d60d9f65 SS |
77 | /* Non-null means it is a pointer to a function to run while waiting for |
78 | character input. */ | |
9255ee31 | 79 | rl_hook_func_t *rl_event_hook = (rl_hook_func_t *)NULL; |
d60d9f65 | 80 | |
9255ee31 EZ |
81 | rl_getc_func_t *rl_getc_function = rl_getc; |
82 | ||
83 | static int _keyboard_input_timeout = 100000; /* 0.1 seconds; it's in usec */ | |
84 | ||
85 | static int ibuffer_space PARAMS((void)); | |
86 | static int rl_get_char PARAMS((int *)); | |
87 | static int rl_gather_tyi PARAMS((void)); | |
d60d9f65 | 88 | |
7f3c5ec8 EZ |
89 | #if defined (_WIN32) && !defined (__CYGWIN__) |
90 | ||
91 | /* 'isatty' in the Windows runtime returns non-zero for every | |
92 | character device, including the null device. Repair that. */ | |
93 | #include <io.h> | |
50e1d299 | 94 | #include <conio.h> |
7f3c5ec8 EZ |
95 | #define WIN32_LEAN_AND_MEAN 1 |
96 | #include <windows.h> | |
97 | ||
98 | int w32_isatty (int fd) | |
99 | { | |
100 | if (_isatty(fd)) | |
101 | { | |
102 | HANDLE h = (HANDLE) _get_osfhandle (fd); | |
103 | DWORD ignored; | |
104 | ||
105 | if (h == INVALID_HANDLE_VALUE) | |
106 | { | |
107 | errno = EBADF; | |
108 | return 0; | |
109 | } | |
110 | if (GetConsoleMode (h, &ignored) != 0) | |
111 | return 1; | |
112 | } | |
113 | errno = ENOTTY; | |
114 | return 0; | |
115 | } | |
116 | ||
117 | #define isatty(x) w32_isatty(x) | |
118 | #endif | |
119 | ||
d60d9f65 SS |
120 | /* **************************************************************** */ |
121 | /* */ | |
122 | /* Character Input Buffering */ | |
123 | /* */ | |
124 | /* **************************************************************** */ | |
125 | ||
126 | static int pop_index, push_index; | |
127 | static unsigned char ibuffer[512]; | |
128 | static int ibuffer_len = sizeof (ibuffer) - 1; | |
129 | ||
130 | #define any_typein (push_index != pop_index) | |
131 | ||
132 | int | |
133 | _rl_any_typein () | |
134 | { | |
135 | return any_typein; | |
136 | } | |
137 | ||
c862e87b JM |
138 | /* Return the amount of space available in the buffer for stuffing |
139 | characters. */ | |
d60d9f65 SS |
140 | static int |
141 | ibuffer_space () | |
142 | { | |
143 | if (pop_index > push_index) | |
c862e87b | 144 | return (pop_index - push_index - 1); |
d60d9f65 SS |
145 | else |
146 | return (ibuffer_len - (push_index - pop_index)); | |
147 | } | |
148 | ||
149 | /* Get a key from the buffer of characters to be read. | |
150 | Return the key in KEY. | |
5836a818 | 151 | Result is KEY if there was a key, or 0 if there wasn't. */ |
d60d9f65 SS |
152 | static int |
153 | rl_get_char (key) | |
154 | int *key; | |
155 | { | |
156 | if (push_index == pop_index) | |
157 | return (0); | |
158 | ||
159 | *key = ibuffer[pop_index++]; | |
cc88a640 | 160 | #if 0 |
d60d9f65 | 161 | if (pop_index >= ibuffer_len) |
cc88a640 JK |
162 | #else |
163 | if (pop_index > ibuffer_len) | |
164 | #endif | |
d60d9f65 SS |
165 | pop_index = 0; |
166 | ||
167 | return (1); | |
168 | } | |
169 | ||
170 | /* Stuff KEY into the *front* of the input buffer. | |
171 | Returns non-zero if successful, zero if there is | |
172 | no space left in the buffer. */ | |
9255ee31 EZ |
173 | int |
174 | _rl_unget_char (key) | |
d60d9f65 SS |
175 | int key; |
176 | { | |
177 | if (ibuffer_space ()) | |
178 | { | |
179 | pop_index--; | |
180 | if (pop_index < 0) | |
cc88a640 | 181 | pop_index = ibuffer_len; |
d60d9f65 SS |
182 | ibuffer[pop_index] = key; |
183 | return (1); | |
184 | } | |
185 | return (0); | |
186 | } | |
187 | ||
5836a818 PP |
188 | int |
189 | _rl_pushed_input_available () | |
190 | { | |
191 | return (push_index != pop_index); | |
192 | } | |
193 | ||
9255ee31 EZ |
194 | /* If a character is available to be read, then read it and stuff it into |
195 | IBUFFER. Otherwise, just return. Returns number of characters read | |
196 | (0 if none available) and -1 on error (EIO). */ | |
197 | static int | |
d60d9f65 SS |
198 | rl_gather_tyi () |
199 | { | |
d60d9f65 SS |
200 | int tty; |
201 | register int tem, result; | |
5bdf8622 | 202 | int chars_avail, k; |
d60d9f65 SS |
203 | char input; |
204 | #if defined(HAVE_SELECT) | |
205 | fd_set readfds, exceptfds; | |
206 | struct timeval timeout; | |
207 | #endif | |
208 | ||
cc88a640 | 209 | chars_avail = 0; |
d60d9f65 SS |
210 | tty = fileno (rl_instream); |
211 | ||
212 | #if defined (HAVE_SELECT) | |
213 | FD_ZERO (&readfds); | |
214 | FD_ZERO (&exceptfds); | |
215 | FD_SET (tty, &readfds); | |
216 | FD_SET (tty, &exceptfds); | |
cc88a640 | 217 | USEC_TO_TIMEVAL (_keyboard_input_timeout, timeout); |
9255ee31 EZ |
218 | result = select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout); |
219 | if (result <= 0) | |
220 | return 0; /* Nothing to read. */ | |
d60d9f65 SS |
221 | #endif |
222 | ||
223 | result = -1; | |
224 | #if defined (FIONREAD) | |
9255ee31 | 225 | errno = 0; |
d60d9f65 | 226 | result = ioctl (tty, FIONREAD, &chars_avail); |
9255ee31 EZ |
227 | if (result == -1 && errno == EIO) |
228 | return -1; | |
d60d9f65 SS |
229 | #endif |
230 | ||
231 | #if defined (O_NDELAY) | |
232 | if (result == -1) | |
233 | { | |
234 | tem = fcntl (tty, F_GETFL, 0); | |
235 | ||
236 | fcntl (tty, F_SETFL, (tem | O_NDELAY)); | |
237 | chars_avail = read (tty, &input, 1); | |
238 | ||
239 | fcntl (tty, F_SETFL, tem); | |
240 | if (chars_avail == -1 && errno == EAGAIN) | |
9255ee31 | 241 | return 0; |
5bdf8622 DJ |
242 | if (chars_avail == 0) /* EOF */ |
243 | { | |
244 | rl_stuff_char (EOF); | |
245 | return (0); | |
246 | } | |
d60d9f65 SS |
247 | } |
248 | #endif /* O_NDELAY */ | |
249 | ||
5bdf8622 | 250 | #if defined (__MINGW32__) |
cc88a640 JK |
251 | /* Use getch/_kbhit to check for available console input, in the same way |
252 | that we read it normally. */ | |
253 | chars_avail = isatty (tty) ? _kbhit () : 0; | |
254 | result = 0; | |
5bdf8622 DJ |
255 | #endif |
256 | ||
d60d9f65 SS |
257 | /* If there's nothing available, don't waste time trying to read |
258 | something. */ | |
259 | if (chars_avail <= 0) | |
9255ee31 | 260 | return 0; |
d60d9f65 SS |
261 | |
262 | tem = ibuffer_space (); | |
263 | ||
264 | if (chars_avail > tem) | |
265 | chars_avail = tem; | |
266 | ||
267 | /* One cannot read all of the available input. I can only read a single | |
268 | character at a time, or else programs which require input can be | |
269 | thwarted. If the buffer is larger than one character, I lose. | |
270 | Damn! */ | |
271 | if (tem < ibuffer_len) | |
272 | chars_avail = 0; | |
273 | ||
274 | if (result != -1) | |
275 | { | |
276 | while (chars_avail--) | |
5bdf8622 | 277 | { |
cc88a640 | 278 | RL_CHECK_SIGNALS (); |
5bdf8622 | 279 | k = (*rl_getc_function) (rl_instream); |
cc88a640 JK |
280 | if (rl_stuff_char (k) == 0) |
281 | break; /* some problem; no more room */ | |
5bdf8622 DJ |
282 | if (k == NEWLINE || k == RETURN) |
283 | break; | |
284 | } | |
d60d9f65 SS |
285 | } |
286 | else | |
287 | { | |
288 | if (chars_avail) | |
289 | rl_stuff_char (input); | |
290 | } | |
9255ee31 EZ |
291 | |
292 | return 1; | |
293 | } | |
294 | ||
295 | int | |
296 | rl_set_keyboard_input_timeout (u) | |
297 | int u; | |
298 | { | |
299 | int o; | |
300 | ||
301 | o = _keyboard_input_timeout; | |
cc88a640 | 302 | if (u >= 0) |
9255ee31 EZ |
303 | _keyboard_input_timeout = u; |
304 | return (o); | |
d60d9f65 SS |
305 | } |
306 | ||
307 | /* Is there input available to be read on the readline input file | |
9255ee31 EZ |
308 | descriptor? Only works if the system has select(2) or FIONREAD. |
309 | Uses the value of _keyboard_input_timeout as the timeout; if another | |
310 | readline function wants to specify a timeout and not leave it up to | |
311 | the user, it should use _rl_input_queued(timeout_value_in_microseconds) | |
312 | instead. */ | |
d60d9f65 SS |
313 | int |
314 | _rl_input_available () | |
315 | { | |
316 | #if defined(HAVE_SELECT) | |
317 | fd_set readfds, exceptfds; | |
318 | struct timeval timeout; | |
319 | #endif | |
9255ee31 | 320 | #if !defined (HAVE_SELECT) && defined(FIONREAD) |
d60d9f65 SS |
321 | int chars_avail; |
322 | #endif | |
323 | int tty; | |
324 | ||
325 | tty = fileno (rl_instream); | |
326 | ||
327 | #if defined (HAVE_SELECT) | |
328 | FD_ZERO (&readfds); | |
329 | FD_ZERO (&exceptfds); | |
330 | FD_SET (tty, &readfds); | |
331 | FD_SET (tty, &exceptfds); | |
332 | timeout.tv_sec = 0; | |
9255ee31 | 333 | timeout.tv_usec = _keyboard_input_timeout; |
d60d9f65 | 334 | return (select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout) > 0); |
9255ee31 | 335 | #else |
d60d9f65 SS |
336 | |
337 | #if defined (FIONREAD) | |
338 | if (ioctl (tty, FIONREAD, &chars_avail) == 0) | |
339 | return (chars_avail); | |
9255ee31 EZ |
340 | #endif |
341 | ||
5bdf8622 DJ |
342 | #endif |
343 | ||
344 | #if defined (__MINGW32__) | |
cc88a640 JK |
345 | if (isatty (tty)) |
346 | return (_kbhit ()); | |
d60d9f65 SS |
347 | #endif |
348 | ||
349 | return 0; | |
350 | } | |
351 | ||
9255ee31 EZ |
352 | int |
353 | _rl_input_queued (t) | |
354 | int t; | |
355 | { | |
356 | int old_timeout, r; | |
357 | ||
358 | old_timeout = rl_set_keyboard_input_timeout (t); | |
359 | r = _rl_input_available (); | |
360 | rl_set_keyboard_input_timeout (old_timeout); | |
361 | return r; | |
362 | } | |
363 | ||
d60d9f65 SS |
364 | void |
365 | _rl_insert_typein (c) | |
366 | int c; | |
367 | { | |
368 | int key, t, i; | |
369 | char *string; | |
370 | ||
371 | i = key = 0; | |
9255ee31 | 372 | string = (char *)xmalloc (ibuffer_len + 1); |
d60d9f65 SS |
373 | string[i++] = (char) c; |
374 | ||
375 | while ((t = rl_get_char (&key)) && | |
376 | _rl_keymap[key].type == ISFUNC && | |
377 | _rl_keymap[key].function == rl_insert) | |
378 | string[i++] = key; | |
379 | ||
380 | if (t) | |
9255ee31 | 381 | _rl_unget_char (key); |
d60d9f65 SS |
382 | |
383 | string[i] = '\0'; | |
384 | rl_insert_text (string); | |
cc88a640 | 385 | xfree (string); |
d60d9f65 SS |
386 | } |
387 | ||
c862e87b JM |
388 | /* Add KEY to the buffer of characters to be read. Returns 1 if the |
389 | character was stuffed correctly; 0 otherwise. */ | |
390 | int | |
391 | rl_stuff_char (key) | |
392 | int key; | |
393 | { | |
394 | if (ibuffer_space () == 0) | |
395 | return 0; | |
396 | ||
397 | if (key == EOF) | |
398 | { | |
399 | key = NEWLINE; | |
400 | rl_pending_input = EOF; | |
9255ee31 | 401 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
c862e87b JM |
402 | } |
403 | ibuffer[push_index++] = key; | |
cc88a640 | 404 | #if 0 |
c862e87b | 405 | if (push_index >= ibuffer_len) |
cc88a640 JK |
406 | #else |
407 | if (push_index > ibuffer_len) | |
408 | #endif | |
c862e87b JM |
409 | push_index = 0; |
410 | ||
411 | return 1; | |
412 | } | |
413 | ||
414 | /* Make C be the next command to be executed. */ | |
415 | int | |
416 | rl_execute_next (c) | |
417 | int c; | |
418 | { | |
419 | rl_pending_input = c; | |
9255ee31 EZ |
420 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
421 | return 0; | |
422 | } | |
423 | ||
424 | /* Clear any pending input pushed with rl_execute_next() */ | |
425 | int | |
426 | rl_clear_pending_input () | |
427 | { | |
428 | rl_pending_input = 0; | |
429 | RL_UNSETSTATE (RL_STATE_INPUTPENDING); | |
c862e87b JM |
430 | return 0; |
431 | } | |
432 | ||
d60d9f65 SS |
433 | /* **************************************************************** */ |
434 | /* */ | |
435 | /* Character Input */ | |
436 | /* */ | |
437 | /* **************************************************************** */ | |
438 | ||
439 | /* Read a key, including pending input. */ | |
440 | int | |
441 | rl_read_key () | |
442 | { | |
5836a818 PP |
443 | int c; |
444 | ||
445 | rl_key_sequence_length++; | |
d60d9f65 SS |
446 | |
447 | if (rl_pending_input) | |
448 | { | |
449 | c = rl_pending_input; | |
9255ee31 | 450 | rl_clear_pending_input (); |
d60d9f65 SS |
451 | } |
452 | else | |
453 | { | |
454 | /* If input is coming from a macro, then use that. */ | |
455 | if (c = _rl_next_macro_key ()) | |
456 | return (c); | |
457 | ||
458 | /* If the user has an event function, then call it periodically. */ | |
459 | if (rl_event_hook) | |
460 | { | |
cc88a640 | 461 | while (rl_event_hook) |
d60d9f65 | 462 | { |
5836a818 | 463 | if (rl_gather_tyi () < 0) /* XXX - EIO */ |
9255ee31 EZ |
464 | { |
465 | rl_done = 1; | |
466 | return ('\n'); | |
467 | } | |
cc88a640 | 468 | RL_CHECK_SIGNALS (); |
5836a818 PP |
469 | if (rl_get_char (&c) != 0) |
470 | break; | |
cc88a640 JK |
471 | if (rl_done) /* XXX - experimental */ |
472 | return ('\n'); | |
473 | (*rl_event_hook) (); | |
d60d9f65 SS |
474 | } |
475 | } | |
476 | else | |
477 | { | |
478 | if (rl_get_char (&c) == 0) | |
479 | c = (*rl_getc_function) (rl_instream); | |
cc88a640 | 480 | RL_CHECK_SIGNALS (); |
d60d9f65 SS |
481 | } |
482 | } | |
483 | ||
484 | return (c); | |
485 | } | |
486 | ||
487 | int | |
488 | rl_getc (stream) | |
489 | FILE *stream; | |
490 | { | |
1b17e766 | 491 | int result; |
d60d9f65 SS |
492 | unsigned char c; |
493 | ||
d60d9f65 SS |
494 | while (1) |
495 | { | |
cc88a640 JK |
496 | RL_CHECK_SIGNALS (); |
497 | ||
5bdf8622 | 498 | #if defined (__MINGW32__) |
7f3c5ec8 EZ |
499 | /* Use _getch to make sure we call the function from MS runtime, |
500 | even if some curses library is linked in. */ | |
fd8be987 | 501 | if (isatty (fileno (stream))) |
7f3c5ec8 | 502 | return (_getch ()); |
fd8be987 | 503 | #endif |
5836a818 | 504 | result = read (fileno (stream), &c, sizeof (unsigned char)); |
d60d9f65 SS |
505 | |
506 | if (result == sizeof (unsigned char)) | |
507 | return (c); | |
508 | ||
509 | /* If zero characters are returned, then the file that we are | |
510 | reading from is empty! Return EOF in that case. */ | |
511 | if (result == 0) | |
512 | return (EOF); | |
513 | ||
c862e87b JM |
514 | #if defined (__BEOS__) |
515 | if (errno == EINTR) | |
516 | continue; | |
517 | #endif | |
518 | ||
d60d9f65 | 519 | #if defined (EWOULDBLOCK) |
1b17e766 EZ |
520 | # define X_EWOULDBLOCK EWOULDBLOCK |
521 | #else | |
522 | # define X_EWOULDBLOCK -99 | |
523 | #endif | |
524 | ||
525 | #if defined (EAGAIN) | |
526 | # define X_EAGAIN EAGAIN | |
527 | #else | |
528 | # define X_EAGAIN -99 | |
529 | #endif | |
530 | ||
531 | if (errno == X_EWOULDBLOCK || errno == X_EAGAIN) | |
d60d9f65 | 532 | { |
9255ee31 | 533 | if (sh_unset_nodelay_mode (fileno (stream)) < 0) |
d60d9f65 | 534 | return (EOF); |
d60d9f65 SS |
535 | continue; |
536 | } | |
d60d9f65 | 537 | |
1b17e766 EZ |
538 | #undef X_EWOULDBLOCK |
539 | #undef X_EAGAIN | |
d60d9f65 | 540 | |
5836a818 PP |
541 | /* If the error that we received was SIGINT, then try again, |
542 | this is simply an interrupted system call to read (). | |
543 | Otherwise, some error ocurred, also signifying EOF. */ | |
d60d9f65 | 544 | if (errno != EINTR) |
cc88a640 | 545 | return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); |
d60d9f65 SS |
546 | } |
547 | } | |
9255ee31 EZ |
548 | |
549 | #if defined (HANDLE_MULTIBYTE) | |
550 | /* read multibyte char */ | |
551 | int | |
552 | _rl_read_mbchar (mbchar, size) | |
553 | char *mbchar; | |
554 | int size; | |
555 | { | |
cc88a640 | 556 | int mb_len, c; |
9255ee31 EZ |
557 | size_t mbchar_bytes_length; |
558 | wchar_t wc; | |
559 | mbstate_t ps, ps_back; | |
560 | ||
561 | memset(&ps, 0, sizeof (mbstate_t)); | |
562 | memset(&ps_back, 0, sizeof (mbstate_t)); | |
cc88a640 JK |
563 | |
564 | mb_len = 0; | |
9255ee31 EZ |
565 | while (mb_len < size) |
566 | { | |
567 | RL_SETSTATE(RL_STATE_MOREINPUT); | |
cc88a640 | 568 | c = rl_read_key (); |
9255ee31 EZ |
569 | RL_UNSETSTATE(RL_STATE_MOREINPUT); |
570 | ||
cc88a640 JK |
571 | if (c < 0) |
572 | break; | |
573 | ||
574 | mbchar[mb_len++] = c; | |
575 | ||
9255ee31 EZ |
576 | mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps); |
577 | if (mbchar_bytes_length == (size_t)(-1)) | |
578 | break; /* invalid byte sequence for the current locale */ | |
579 | else if (mbchar_bytes_length == (size_t)(-2)) | |
580 | { | |
581 | /* shorted bytes */ | |
582 | ps = ps_back; | |
583 | continue; | |
584 | } | |
5bdf8622 DJ |
585 | else if (mbchar_bytes_length == 0) |
586 | { | |
587 | mbchar[0] = '\0'; /* null wide character */ | |
588 | mb_len = 1; | |
589 | break; | |
590 | } | |
9255ee31 EZ |
591 | else if (mbchar_bytes_length > (size_t)(0)) |
592 | break; | |
593 | } | |
594 | ||
595 | return mb_len; | |
596 | } | |
597 | ||
598 | /* Read a multibyte-character string whose first character is FIRST into | |
cc88a640 | 599 | the buffer MB of length MLEN. Returns the last character read, which |
9255ee31 EZ |
600 | may be FIRST. Used by the search functions, among others. Very similar |
601 | to _rl_read_mbchar. */ | |
602 | int | |
cc88a640 | 603 | _rl_read_mbstring (first, mb, mlen) |
9255ee31 EZ |
604 | int first; |
605 | char *mb; | |
cc88a640 | 606 | int mlen; |
9255ee31 EZ |
607 | { |
608 | int i, c; | |
609 | mbstate_t ps; | |
610 | ||
611 | c = first; | |
cc88a640 JK |
612 | memset (mb, 0, mlen); |
613 | for (i = 0; c >= 0 && i < mlen; i++) | |
9255ee31 EZ |
614 | { |
615 | mb[i] = (char)c; | |
616 | memset (&ps, 0, sizeof (mbstate_t)); | |
617 | if (_rl_get_char_len (mb, &ps) == -2) | |
618 | { | |
619 | /* Read more for multibyte character */ | |
620 | RL_SETSTATE (RL_STATE_MOREINPUT); | |
621 | c = rl_read_key (); | |
622 | RL_UNSETSTATE (RL_STATE_MOREINPUT); | |
623 | } | |
624 | else | |
625 | break; | |
626 | } | |
627 | return c; | |
628 | } | |
629 | #endif /* HANDLE_MULTIBYTE */ |