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