| 1 | /* input.c -- character input functions for readline. */ |
| 2 | |
| 3 | /* Copyright (C) 1994-2017 Free Software Foundation, Inc. |
| 4 | |
| 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. |
| 7 | |
| 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 |
| 11 | (at your option) any later version. |
| 12 | |
| 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 |
| 16 | GNU General Public License for more details. |
| 17 | |
| 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 | |
| 22 | #define READLINE_LIBRARY |
| 23 | |
| 24 | #if defined (__TANDEM) |
| 25 | # include <floss.h> |
| 26 | #endif |
| 27 | |
| 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 | |
| 48 | #include <signal.h> |
| 49 | |
| 50 | #include "posixselect.h" |
| 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" |
| 65 | #include "rlmbutil.h" |
| 66 | |
| 67 | /* Some standard library routines. */ |
| 68 | #include "readline.h" |
| 69 | |
| 70 | #include "rlprivate.h" |
| 71 | #include "rlshell.h" |
| 72 | #include "xmalloc.h" |
| 73 | |
| 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 | |
| 79 | #if defined (HAVE_PSELECT) |
| 80 | extern sigset_t _rl_orig_sigset; |
| 81 | #endif |
| 82 | |
| 83 | /* Non-null means it is a pointer to a function to run while waiting for |
| 84 | character input. */ |
| 85 | rl_hook_func_t *rl_event_hook = (rl_hook_func_t *)NULL; |
| 86 | |
| 87 | /* A function to call if a read(2) is interrupted by a signal. */ |
| 88 | rl_hook_func_t *rl_signal_event_hook = (rl_hook_func_t *)NULL; |
| 89 | |
| 90 | /* A function to replace _rl_input_available for applications using the |
| 91 | callback interface. */ |
| 92 | rl_hook_func_t *rl_input_available_hook = (rl_hook_func_t *)NULL; |
| 93 | |
| 94 | rl_getc_func_t *rl_getc_function = rl_getc; |
| 95 | |
| 96 | static int _keyboard_input_timeout = 100000; /* 0.1 seconds; it's in usec */ |
| 97 | |
| 98 | static int ibuffer_space PARAMS((void)); |
| 99 | static int rl_get_char PARAMS((int *)); |
| 100 | static int rl_gather_tyi PARAMS((void)); |
| 101 | |
| 102 | #if defined (_WIN32) && !defined (__CYGWIN__) |
| 103 | |
| 104 | /* 'isatty' in the Windows runtime returns non-zero for every |
| 105 | character device, including the null device. Repair that. */ |
| 106 | #include <io.h> |
| 107 | #include <conio.h> |
| 108 | #define WIN32_LEAN_AND_MEAN 1 |
| 109 | #include <windows.h> |
| 110 | |
| 111 | int w32_isatty (int fd) |
| 112 | { |
| 113 | if (_isatty(fd)) |
| 114 | { |
| 115 | HANDLE h; |
| 116 | DWORD ignored; |
| 117 | |
| 118 | if ((h = (HANDLE) _get_osfhandle (fd)) == INVALID_HANDLE_VALUE) |
| 119 | { |
| 120 | errno = EBADF; |
| 121 | return 0; |
| 122 | } |
| 123 | if (GetConsoleMode (h, &ignored) != 0) |
| 124 | return 1; |
| 125 | } |
| 126 | errno = ENOTTY; |
| 127 | return 0; |
| 128 | } |
| 129 | |
| 130 | #define isatty(x) w32_isatty(x) |
| 131 | #endif |
| 132 | |
| 133 | /* **************************************************************** */ |
| 134 | /* */ |
| 135 | /* Character Input Buffering */ |
| 136 | /* */ |
| 137 | /* **************************************************************** */ |
| 138 | |
| 139 | static int pop_index, push_index; |
| 140 | static unsigned char ibuffer[512]; |
| 141 | static int ibuffer_len = sizeof (ibuffer) - 1; |
| 142 | |
| 143 | #define any_typein (push_index != pop_index) |
| 144 | |
| 145 | int |
| 146 | _rl_any_typein (void) |
| 147 | { |
| 148 | return any_typein; |
| 149 | } |
| 150 | |
| 151 | int |
| 152 | _rl_pushed_input_available (void) |
| 153 | { |
| 154 | return (push_index != pop_index); |
| 155 | } |
| 156 | |
| 157 | /* Return the amount of space available in the buffer for stuffing |
| 158 | characters. */ |
| 159 | static int |
| 160 | ibuffer_space (void) |
| 161 | { |
| 162 | if (pop_index > push_index) |
| 163 | return (pop_index - push_index - 1); |
| 164 | else |
| 165 | return (ibuffer_len - (push_index - pop_index)); |
| 166 | } |
| 167 | |
| 168 | /* Get a key from the buffer of characters to be read. |
| 169 | Return the key in KEY. |
| 170 | Result is non-zero if there was a key, or 0 if there wasn't. */ |
| 171 | static int |
| 172 | rl_get_char (int *key) |
| 173 | { |
| 174 | if (push_index == pop_index) |
| 175 | return (0); |
| 176 | |
| 177 | *key = ibuffer[pop_index++]; |
| 178 | #if 0 |
| 179 | if (pop_index >= ibuffer_len) |
| 180 | #else |
| 181 | if (pop_index > ibuffer_len) |
| 182 | #endif |
| 183 | pop_index = 0; |
| 184 | |
| 185 | return (1); |
| 186 | } |
| 187 | |
| 188 | /* Stuff KEY into the *front* of the input buffer. |
| 189 | Returns non-zero if successful, zero if there is |
| 190 | no space left in the buffer. */ |
| 191 | int |
| 192 | _rl_unget_char (int key) |
| 193 | { |
| 194 | if (ibuffer_space ()) |
| 195 | { |
| 196 | pop_index--; |
| 197 | if (pop_index < 0) |
| 198 | pop_index = ibuffer_len; |
| 199 | ibuffer[pop_index] = key; |
| 200 | return (1); |
| 201 | } |
| 202 | return (0); |
| 203 | } |
| 204 | |
| 205 | /* If a character is available to be read, then read it and stuff it into |
| 206 | IBUFFER. Otherwise, just return. Returns number of characters read |
| 207 | (0 if none available) and -1 on error (EIO). */ |
| 208 | static int |
| 209 | rl_gather_tyi (void) |
| 210 | { |
| 211 | int tty; |
| 212 | register int tem, result; |
| 213 | int chars_avail, k; |
| 214 | char input; |
| 215 | #if defined(HAVE_SELECT) |
| 216 | fd_set readfds, exceptfds; |
| 217 | struct timeval timeout; |
| 218 | #endif |
| 219 | |
| 220 | chars_avail = 0; |
| 221 | input = 0; |
| 222 | tty = fileno (rl_instream); |
| 223 | |
| 224 | #if defined (HAVE_SELECT) |
| 225 | FD_ZERO (&readfds); |
| 226 | FD_ZERO (&exceptfds); |
| 227 | FD_SET (tty, &readfds); |
| 228 | FD_SET (tty, &exceptfds); |
| 229 | USEC_TO_TIMEVAL (_keyboard_input_timeout, timeout); |
| 230 | result = select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout); |
| 231 | if (result <= 0) |
| 232 | return 0; /* Nothing to read. */ |
| 233 | #endif |
| 234 | |
| 235 | result = -1; |
| 236 | errno = 0; |
| 237 | #if defined (FIONREAD) |
| 238 | result = ioctl (tty, FIONREAD, &chars_avail); |
| 239 | if (result == -1 && errno == EIO) |
| 240 | return -1; |
| 241 | if (result == -1) |
| 242 | chars_avail = 0; |
| 243 | #endif |
| 244 | |
| 245 | #if defined (O_NDELAY) |
| 246 | if (result == -1) |
| 247 | { |
| 248 | tem = fcntl (tty, F_GETFL, 0); |
| 249 | |
| 250 | fcntl (tty, F_SETFL, (tem | O_NDELAY)); |
| 251 | chars_avail = read (tty, &input, 1); |
| 252 | |
| 253 | fcntl (tty, F_SETFL, tem); |
| 254 | if (chars_avail == -1 && errno == EAGAIN) |
| 255 | return 0; |
| 256 | if (chars_avail == -1 && errno == EIO) |
| 257 | return -1; |
| 258 | if (chars_avail == 0) /* EOF */ |
| 259 | { |
| 260 | rl_stuff_char (EOF); |
| 261 | return (0); |
| 262 | } |
| 263 | } |
| 264 | #endif /* O_NDELAY */ |
| 265 | |
| 266 | #if defined (__MINGW32__) |
| 267 | /* Use getch/_kbhit to check for available console input, in the same way |
| 268 | that we read it normally. */ |
| 269 | chars_avail = isatty (tty) ? _kbhit () : 0; |
| 270 | result = 0; |
| 271 | #endif |
| 272 | |
| 273 | /* If there's nothing available, don't waste time trying to read |
| 274 | something. */ |
| 275 | if (chars_avail <= 0) |
| 276 | return 0; |
| 277 | |
| 278 | tem = ibuffer_space (); |
| 279 | |
| 280 | if (chars_avail > tem) |
| 281 | chars_avail = tem; |
| 282 | |
| 283 | /* One cannot read all of the available input. I can only read a single |
| 284 | character at a time, or else programs which require input can be |
| 285 | thwarted. If the buffer is larger than one character, I lose. |
| 286 | Damn! */ |
| 287 | if (tem < ibuffer_len) |
| 288 | chars_avail = 0; |
| 289 | |
| 290 | if (result != -1) |
| 291 | { |
| 292 | while (chars_avail--) |
| 293 | { |
| 294 | RL_CHECK_SIGNALS (); |
| 295 | k = (*rl_getc_function) (rl_instream); |
| 296 | if (rl_stuff_char (k) == 0) |
| 297 | break; /* some problem; no more room */ |
| 298 | if (k == NEWLINE || k == RETURN) |
| 299 | break; |
| 300 | } |
| 301 | } |
| 302 | else |
| 303 | { |
| 304 | if (chars_avail) |
| 305 | rl_stuff_char (input); |
| 306 | } |
| 307 | |
| 308 | return 1; |
| 309 | } |
| 310 | |
| 311 | int |
| 312 | rl_set_keyboard_input_timeout (int u) |
| 313 | { |
| 314 | int o; |
| 315 | |
| 316 | o = _keyboard_input_timeout; |
| 317 | if (u >= 0) |
| 318 | _keyboard_input_timeout = u; |
| 319 | return (o); |
| 320 | } |
| 321 | |
| 322 | /* Is there input available to be read on the readline input file |
| 323 | descriptor? Only works if the system has select(2) or FIONREAD. |
| 324 | Uses the value of _keyboard_input_timeout as the timeout; if another |
| 325 | readline function wants to specify a timeout and not leave it up to |
| 326 | the user, it should use _rl_input_queued(timeout_value_in_microseconds) |
| 327 | instead. */ |
| 328 | int |
| 329 | _rl_input_available (void) |
| 330 | { |
| 331 | #if defined(HAVE_SELECT) |
| 332 | fd_set readfds, exceptfds; |
| 333 | struct timeval timeout; |
| 334 | #endif |
| 335 | #if !defined (HAVE_SELECT) && defined(FIONREAD) |
| 336 | int chars_avail; |
| 337 | #endif |
| 338 | int tty; |
| 339 | |
| 340 | if (rl_input_available_hook) |
| 341 | return (*rl_input_available_hook) (); |
| 342 | |
| 343 | tty = fileno (rl_instream); |
| 344 | |
| 345 | #if defined (HAVE_SELECT) |
| 346 | FD_ZERO (&readfds); |
| 347 | FD_ZERO (&exceptfds); |
| 348 | FD_SET (tty, &readfds); |
| 349 | FD_SET (tty, &exceptfds); |
| 350 | timeout.tv_sec = 0; |
| 351 | timeout.tv_usec = _keyboard_input_timeout; |
| 352 | return (select (tty + 1, &readfds, (fd_set *)NULL, &exceptfds, &timeout) > 0); |
| 353 | #else |
| 354 | |
| 355 | #if defined (FIONREAD) |
| 356 | if (ioctl (tty, FIONREAD, &chars_avail) == 0) |
| 357 | return (chars_avail); |
| 358 | #endif |
| 359 | |
| 360 | #endif |
| 361 | |
| 362 | #if defined (__MINGW32__) |
| 363 | if (isatty (tty)) |
| 364 | return (_kbhit ()); |
| 365 | #endif |
| 366 | |
| 367 | return 0; |
| 368 | } |
| 369 | |
| 370 | int |
| 371 | _rl_input_queued (int t) |
| 372 | { |
| 373 | int old_timeout, r; |
| 374 | |
| 375 | old_timeout = rl_set_keyboard_input_timeout (t); |
| 376 | r = _rl_input_available (); |
| 377 | rl_set_keyboard_input_timeout (old_timeout); |
| 378 | return r; |
| 379 | } |
| 380 | |
| 381 | void |
| 382 | _rl_insert_typein (int c) |
| 383 | { |
| 384 | int key, t, i; |
| 385 | char *string; |
| 386 | |
| 387 | i = key = 0; |
| 388 | string = (char *)xmalloc (ibuffer_len + 1); |
| 389 | string[i++] = (char) c; |
| 390 | |
| 391 | while ((t = rl_get_char (&key)) && |
| 392 | _rl_keymap[key].type == ISFUNC && |
| 393 | _rl_keymap[key].function == rl_insert) |
| 394 | string[i++] = key; |
| 395 | |
| 396 | if (t) |
| 397 | _rl_unget_char (key); |
| 398 | |
| 399 | string[i] = '\0'; |
| 400 | rl_insert_text (string); |
| 401 | xfree (string); |
| 402 | } |
| 403 | |
| 404 | /* Add KEY to the buffer of characters to be read. Returns 1 if the |
| 405 | character was stuffed correctly; 0 otherwise. */ |
| 406 | int |
| 407 | rl_stuff_char (int key) |
| 408 | { |
| 409 | if (ibuffer_space () == 0) |
| 410 | return 0; |
| 411 | |
| 412 | if (key == EOF) |
| 413 | { |
| 414 | key = NEWLINE; |
| 415 | rl_pending_input = EOF; |
| 416 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
| 417 | } |
| 418 | ibuffer[push_index++] = key; |
| 419 | #if 0 |
| 420 | if (push_index >= ibuffer_len) |
| 421 | #else |
| 422 | if (push_index > ibuffer_len) |
| 423 | #endif |
| 424 | push_index = 0; |
| 425 | |
| 426 | return 1; |
| 427 | } |
| 428 | |
| 429 | /* Make C be the next command to be executed. */ |
| 430 | int |
| 431 | rl_execute_next (int c) |
| 432 | { |
| 433 | rl_pending_input = c; |
| 434 | RL_SETSTATE (RL_STATE_INPUTPENDING); |
| 435 | return 0; |
| 436 | } |
| 437 | |
| 438 | /* Clear any pending input pushed with rl_execute_next() */ |
| 439 | int |
| 440 | rl_clear_pending_input (void) |
| 441 | { |
| 442 | rl_pending_input = 0; |
| 443 | RL_UNSETSTATE (RL_STATE_INPUTPENDING); |
| 444 | return 0; |
| 445 | } |
| 446 | |
| 447 | /* **************************************************************** */ |
| 448 | /* */ |
| 449 | /* Character Input */ |
| 450 | /* */ |
| 451 | /* **************************************************************** */ |
| 452 | |
| 453 | /* Read a key, including pending input. */ |
| 454 | int |
| 455 | rl_read_key (void) |
| 456 | { |
| 457 | int c, r; |
| 458 | |
| 459 | if (rl_pending_input) |
| 460 | { |
| 461 | c = rl_pending_input; /* XXX - cast to unsigned char if > 0? */ |
| 462 | rl_clear_pending_input (); |
| 463 | } |
| 464 | else |
| 465 | { |
| 466 | /* If input is coming from a macro, then use that. */ |
| 467 | if (c = _rl_next_macro_key ()) |
| 468 | return ((unsigned char)c); |
| 469 | |
| 470 | /* If the user has an event function, then call it periodically. */ |
| 471 | if (rl_event_hook) |
| 472 | { |
| 473 | while (rl_event_hook) |
| 474 | { |
| 475 | if (rl_get_char (&c) != 0) |
| 476 | break; |
| 477 | |
| 478 | if ((r = rl_gather_tyi ()) < 0) /* XXX - EIO */ |
| 479 | { |
| 480 | rl_done = 1; |
| 481 | return (errno == EIO ? (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF) : '\n'); |
| 482 | } |
| 483 | else if (r > 0) /* read something */ |
| 484 | continue; |
| 485 | |
| 486 | RL_CHECK_SIGNALS (); |
| 487 | if (rl_done) /* XXX - experimental */ |
| 488 | return ('\n'); |
| 489 | (*rl_event_hook) (); |
| 490 | } |
| 491 | } |
| 492 | else |
| 493 | { |
| 494 | if (rl_get_char (&c) == 0) |
| 495 | c = (*rl_getc_function) (rl_instream); |
| 496 | /* fprintf(stderr, "rl_read_key: calling RL_CHECK_SIGNALS: _rl_caught_signal = %d", _rl_caught_signal); */ |
| 497 | RL_CHECK_SIGNALS (); |
| 498 | } |
| 499 | } |
| 500 | |
| 501 | return (c); |
| 502 | } |
| 503 | |
| 504 | int |
| 505 | rl_getc (FILE *stream) |
| 506 | { |
| 507 | int result; |
| 508 | unsigned char c; |
| 509 | #if defined (HAVE_PSELECT) |
| 510 | sigset_t empty_set; |
| 511 | fd_set readfds; |
| 512 | #endif |
| 513 | |
| 514 | while (1) |
| 515 | { |
| 516 | RL_CHECK_SIGNALS (); |
| 517 | |
| 518 | /* We know at this point that _rl_caught_signal == 0 */ |
| 519 | |
| 520 | #if defined (__MINGW32__) |
| 521 | if (isatty (fileno (stream))) |
| 522 | return (_getch ()); /* "There is no error return." */ |
| 523 | #endif |
| 524 | result = 0; |
| 525 | #if defined (HAVE_PSELECT) |
| 526 | FD_ZERO (&readfds); |
| 527 | FD_SET (fileno (stream), &readfds); |
| 528 | # if defined (HANDLE_SIGNALS) |
| 529 | result = pselect (fileno (stream) + 1, &readfds, NULL, NULL, NULL, &_rl_orig_sigset); |
| 530 | # else |
| 531 | sigemptyset (&empty_set); |
| 532 | sigprocmask (SIG_BLOCK, (sigset_t *)NULL, &empty_set); |
| 533 | result = pselect (fileno (stream) + 1, &readfds, NULL, NULL, NULL, &empty_set); |
| 534 | # endif /* HANDLE_SIGNALS */ |
| 535 | #endif |
| 536 | if (result >= 0) |
| 537 | result = read (fileno (stream), &c, sizeof (unsigned char)); |
| 538 | |
| 539 | if (result == sizeof (unsigned char)) |
| 540 | return (c); |
| 541 | |
| 542 | /* If zero characters are returned, then the file that we are |
| 543 | reading from is empty! Return EOF in that case. */ |
| 544 | if (result == 0) |
| 545 | return (EOF); |
| 546 | |
| 547 | #if defined (__BEOS__) |
| 548 | if (errno == EINTR) |
| 549 | continue; |
| 550 | #endif |
| 551 | |
| 552 | #if defined (EWOULDBLOCK) |
| 553 | # define X_EWOULDBLOCK EWOULDBLOCK |
| 554 | #else |
| 555 | # define X_EWOULDBLOCK -99 |
| 556 | #endif |
| 557 | |
| 558 | #if defined (EAGAIN) |
| 559 | # define X_EAGAIN EAGAIN |
| 560 | #else |
| 561 | # define X_EAGAIN -99 |
| 562 | #endif |
| 563 | |
| 564 | if (errno == X_EWOULDBLOCK || errno == X_EAGAIN) |
| 565 | { |
| 566 | if (sh_unset_nodelay_mode (fileno (stream)) < 0) |
| 567 | return (EOF); |
| 568 | continue; |
| 569 | } |
| 570 | |
| 571 | #undef X_EWOULDBLOCK |
| 572 | #undef X_EAGAIN |
| 573 | |
| 574 | /* fprintf(stderr, "rl_getc: result = %d errno = %d\n", result, errno); */ |
| 575 | |
| 576 | handle_error: |
| 577 | /* If the error that we received was EINTR, then try again, |
| 578 | this is simply an interrupted system call to read (). We allow |
| 579 | the read to be interrupted if we caught SIGHUP, SIGTERM, or any |
| 580 | of the other signals readline treats specially. If the |
| 581 | application sets an event hook, call it for other signals. |
| 582 | Otherwise (not EINTR), some error occurred, also signifying EOF. */ |
| 583 | if (errno != EINTR) |
| 584 | return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); |
| 585 | /* fatal signals of interest */ |
| 586 | #if defined (SIGHUP) |
| 587 | else if (_rl_caught_signal == SIGHUP || _rl_caught_signal == SIGTERM) |
| 588 | #else |
| 589 | else if (_rl_caught_signal == SIGTERM) |
| 590 | #endif |
| 591 | return (RL_ISSTATE (RL_STATE_READCMD) ? READERR : EOF); |
| 592 | /* keyboard-generated signals of interest */ |
| 593 | #if defined (SIGQUIT) |
| 594 | else if (_rl_caught_signal == SIGINT || _rl_caught_signal == SIGQUIT) |
| 595 | #else |
| 596 | else if (_rl_caught_signal == SIGINT) |
| 597 | #endif |
| 598 | RL_CHECK_SIGNALS (); |
| 599 | /* non-keyboard-generated signals of interest */ |
| 600 | #if defined (SIGWINCH) |
| 601 | else if (_rl_caught_signal == SIGWINCH) |
| 602 | RL_CHECK_SIGNALS (); |
| 603 | #endif /* SIGWINCH */ |
| 604 | #if defined (SIGALRM) |
| 605 | else if (_rl_caught_signal == SIGALRM |
| 606 | # if defined (SIGVTALRM) |
| 607 | || _rl_caught_signal == SIGVTALRM |
| 608 | # endif |
| 609 | ) |
| 610 | RL_CHECK_SIGNALS (); |
| 611 | #endif /* SIGALRM */ |
| 612 | |
| 613 | if (rl_signal_event_hook) |
| 614 | (*rl_signal_event_hook) (); |
| 615 | } |
| 616 | } |
| 617 | |
| 618 | #if defined (HANDLE_MULTIBYTE) |
| 619 | /* read multibyte char */ |
| 620 | int |
| 621 | _rl_read_mbchar (char *mbchar, int size) |
| 622 | { |
| 623 | int mb_len, c; |
| 624 | size_t mbchar_bytes_length; |
| 625 | wchar_t wc; |
| 626 | mbstate_t ps, ps_back; |
| 627 | |
| 628 | memset(&ps, 0, sizeof (mbstate_t)); |
| 629 | memset(&ps_back, 0, sizeof (mbstate_t)); |
| 630 | |
| 631 | mb_len = 0; |
| 632 | while (mb_len < size) |
| 633 | { |
| 634 | RL_SETSTATE(RL_STATE_MOREINPUT); |
| 635 | c = rl_read_key (); |
| 636 | RL_UNSETSTATE(RL_STATE_MOREINPUT); |
| 637 | |
| 638 | if (c < 0) |
| 639 | break; |
| 640 | |
| 641 | mbchar[mb_len++] = c; |
| 642 | |
| 643 | mbchar_bytes_length = mbrtowc (&wc, mbchar, mb_len, &ps); |
| 644 | if (mbchar_bytes_length == (size_t)(-1)) |
| 645 | break; /* invalid byte sequence for the current locale */ |
| 646 | else if (mbchar_bytes_length == (size_t)(-2)) |
| 647 | { |
| 648 | /* shorted bytes */ |
| 649 | ps = ps_back; |
| 650 | continue; |
| 651 | } |
| 652 | else if (mbchar_bytes_length == 0) |
| 653 | { |
| 654 | mbchar[0] = '\0'; /* null wide character */ |
| 655 | mb_len = 1; |
| 656 | break; |
| 657 | } |
| 658 | else if (mbchar_bytes_length > (size_t)(0)) |
| 659 | break; |
| 660 | } |
| 661 | |
| 662 | return mb_len; |
| 663 | } |
| 664 | |
| 665 | /* Read a multibyte-character string whose first character is FIRST into |
| 666 | the buffer MB of length MLEN. Returns the last character read, which |
| 667 | may be FIRST. Used by the search functions, among others. Very similar |
| 668 | to _rl_read_mbchar. */ |
| 669 | int |
| 670 | _rl_read_mbstring (int first, char *mb, int mlen) |
| 671 | { |
| 672 | int i, c, n; |
| 673 | mbstate_t ps; |
| 674 | |
| 675 | c = first; |
| 676 | memset (mb, 0, mlen); |
| 677 | for (i = 0; c >= 0 && i < mlen; i++) |
| 678 | { |
| 679 | mb[i] = (char)c; |
| 680 | memset (&ps, 0, sizeof (mbstate_t)); |
| 681 | n = _rl_get_char_len (mb, &ps); |
| 682 | if (n == -2) |
| 683 | { |
| 684 | /* Read more for multibyte character */ |
| 685 | RL_SETSTATE (RL_STATE_MOREINPUT); |
| 686 | c = rl_read_key (); |
| 687 | RL_UNSETSTATE (RL_STATE_MOREINPUT); |
| 688 | } |
| 689 | else |
| 690 | break; |
| 691 | } |
| 692 | return c; |
| 693 | } |
| 694 | #endif /* HANDLE_MULTIBYTE */ |