| 1 | /* readline.c -- a general facility for reading lines of input |
| 2 | with emacs style editing and completion. */ |
| 3 | |
| 4 | /* Copyright 1987, 1989, 1991, 1992 Free Software Foundation, Inc. |
| 5 | |
| 6 | This file is part of the GNU Readline Library, a library for |
| 7 | reading lines of text with interactive input and history editing. |
| 8 | |
| 9 | The GNU Readline Library is free software; you can redistribute it |
| 10 | and/or modify it under the terms of the GNU General Public License |
| 11 | as published by the Free Software Foundation; either version 1, or |
| 12 | (at your option) any later version. |
| 13 | |
| 14 | The GNU Readline Library is distributed in the hope that it will be |
| 15 | useful, but WITHOUT ANY WARRANTY; without even the implied warranty |
| 16 | of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
| 17 | GNU General Public License for more details. |
| 18 | |
| 19 | The GNU General Public License is often shipped with GNU software, and |
| 20 | is generally kept in a file called COPYING or LICENSE. If you do not |
| 21 | have a copy of the license, write to the Free Software Foundation, |
| 22 | 675 Mass Ave, Cambridge, MA 02139, USA. */ |
| 23 | |
| 24 | #include "sysdep.h" |
| 25 | #include <stdio.h> |
| 26 | #include <fcntl.h> |
| 27 | #ifndef NO_SYS_FILE |
| 28 | #include <sys/file.h> |
| 29 | #endif |
| 30 | #include <signal.h> |
| 31 | |
| 32 | /* This is needed to include support for TIOCGWINSZ and window resizing. */ |
| 33 | #if defined (OSF1) || defined (BSD386) || defined (_386BSD) || defined (AIX) |
| 34 | # include <sys/ioctl.h> |
| 35 | #endif /* OSF1 */ |
| 36 | |
| 37 | #if defined (HAVE_UNISTD_H) |
| 38 | # include <unistd.h> |
| 39 | #endif |
| 40 | \f |
| 41 | #include <errno.h> |
| 42 | /* Not all systems declare ERRNO in errno.h... and some systems #define it! */ |
| 43 | #if !defined (errno) |
| 44 | extern int errno; |
| 45 | #endif /* !errno */ |
| 46 | |
| 47 | extern char * getenv (); |
| 48 | |
| 49 | #include <setjmp.h> |
| 50 | #include <sys/stat.h> |
| 51 | |
| 52 | /* System-specific feature definitions and include files. */ |
| 53 | #include "rldefs.h" |
| 54 | |
| 55 | /* Some standard library routines. */ |
| 56 | #include "readline.h" |
| 57 | #include "history.h" |
| 58 | |
| 59 | /* NOTE: Functions and variables prefixed with `_rl_' are |
| 60 | pseudo-global: they are global so they can be shared |
| 61 | between files in the readline library, but are not intended |
| 62 | to be visible to readline callers. */ |
| 63 | |
| 64 | /* Functions imported from other files in the library. */ |
| 65 | extern char *tgetstr (); |
| 66 | extern void rl_prep_terminal (), rl_deprep_terminal (); |
| 67 | extern void rl_vi_set_last (); |
| 68 | extern Function *rl_function_of_keyseq (); |
| 69 | extern char *tilde_expand (); |
| 70 | |
| 71 | /* External redisplay functions and variables from display.c */ |
| 72 | extern void rl_redisplay (); |
| 73 | extern void _rl_move_vert (); |
| 74 | |
| 75 | extern void _rl_erase_at_end_of_line (); |
| 76 | extern void _rl_move_cursor_relative (); |
| 77 | |
| 78 | extern int _rl_vis_botlin; |
| 79 | extern int _rl_last_c_pos; |
| 80 | extern int rl_display_fixed; |
| 81 | |
| 82 | /* Variables imported from complete.c. */ |
| 83 | extern char *rl_completer_word_break_characters; |
| 84 | extern char *rl_basic_word_break_characters; |
| 85 | extern Function *rl_symbolic_link_hook; |
| 86 | extern int rl_completion_query_items; |
| 87 | extern int rl_complete_with_tilde_expansion; |
| 88 | |
| 89 | /* Forward declarations used in this file. */ |
| 90 | void rl_dispatch (); |
| 91 | void free_history_entry (); |
| 92 | int _rl_output_character_function (); |
| 93 | void _rl_set_screen_size (); |
| 94 | void free_undo_list (), rl_add_undo (); |
| 95 | |
| 96 | #if !defined (__GO32__) |
| 97 | static void readline_default_bindings (); |
| 98 | #endif /* !__GO32__ */ |
| 99 | |
| 100 | #if defined (__GO32__) |
| 101 | # include <sys/pc.h> |
| 102 | # undef HANDLE_SIGNALS |
| 103 | #endif /* __GO32__ */ |
| 104 | |
| 105 | #if defined (STATIC_MALLOC) |
| 106 | static char *xmalloc (), *xrealloc (); |
| 107 | #else |
| 108 | extern char *xmalloc (), *xrealloc (); |
| 109 | #endif /* STATIC_MALLOC */ |
| 110 | |
| 111 | \f |
| 112 | /* **************************************************************** */ |
| 113 | /* */ |
| 114 | /* Line editing input utility */ |
| 115 | /* */ |
| 116 | /* **************************************************************** */ |
| 117 | |
| 118 | static char *LibraryVersion = "2.0 (Cygnus)"; |
| 119 | |
| 120 | /* A pointer to the keymap that is currently in use. |
| 121 | By default, it is the standard emacs keymap. */ |
| 122 | Keymap _rl_keymap = emacs_standard_keymap; |
| 123 | |
| 124 | /* The current style of editing. */ |
| 125 | int rl_editing_mode = emacs_mode; |
| 126 | |
| 127 | /* Non-zero if the previous command was a kill command. */ |
| 128 | static int last_command_was_kill = 0; |
| 129 | |
| 130 | /* The current value of the numeric argument specified by the user. */ |
| 131 | int rl_numeric_arg = 1; |
| 132 | |
| 133 | /* Non-zero if an argument was typed. */ |
| 134 | int rl_explicit_arg = 0; |
| 135 | |
| 136 | /* Temporary value used while generating the argument. */ |
| 137 | int rl_arg_sign = 1; |
| 138 | |
| 139 | /* Non-zero means we have been called at least once before. */ |
| 140 | static int rl_initialized = 0; |
| 141 | |
| 142 | /* If non-zero, this program is running in an EMACS buffer. */ |
| 143 | static char *running_in_emacs = (char *)NULL; |
| 144 | |
| 145 | /* The current offset in the current input line. */ |
| 146 | int rl_point; |
| 147 | |
| 148 | /* Mark in the current input line. */ |
| 149 | int rl_mark; |
| 150 | |
| 151 | /* Length of the current input line. */ |
| 152 | int rl_end; |
| 153 | |
| 154 | /* Make this non-zero to return the current input_line. */ |
| 155 | int rl_done; |
| 156 | |
| 157 | /* The last function executed by readline. */ |
| 158 | Function *rl_last_func = (Function *)NULL; |
| 159 | |
| 160 | /* Top level environment for readline_internal (). */ |
| 161 | static jmp_buf readline_top_level; |
| 162 | |
| 163 | /* The streams we interact with. */ |
| 164 | static FILE *in_stream, *out_stream; |
| 165 | |
| 166 | /* The names of the streams that we do input and output to. */ |
| 167 | FILE *rl_instream = (FILE *)NULL; |
| 168 | FILE *rl_outstream = (FILE *)NULL; |
| 169 | |
| 170 | /* Non-zero means echo characters as they are read. */ |
| 171 | int readline_echoing_p = 1; |
| 172 | |
| 173 | /* Current prompt. */ |
| 174 | char *rl_prompt; |
| 175 | |
| 176 | /* The number of characters read in order to type this complete command. */ |
| 177 | int rl_key_sequence_length = 0; |
| 178 | |
| 179 | /* If non-zero, then this is the address of a function to call just |
| 180 | before readline_internal () prints the first prompt. */ |
| 181 | Function *rl_startup_hook = (Function *)NULL; |
| 182 | |
| 183 | /* What we use internally. You should always refer to RL_LINE_BUFFER. */ |
| 184 | static char *the_line; |
| 185 | |
| 186 | /* The character that can generate an EOF. Really read from |
| 187 | the terminal driver... just defaulted here. */ |
| 188 | int _rl_eof_char = CTRL ('D'); |
| 189 | |
| 190 | /* Non-zero makes this the next keystroke to read. */ |
| 191 | int rl_pending_input = 0; |
| 192 | |
| 193 | /* Pointer to a useful terminal name. */ |
| 194 | char *rl_terminal_name = (char *)NULL; |
| 195 | |
| 196 | /* Non-zero means to always use horizontal scrolling in line display. */ |
| 197 | int _rl_horizontal_scroll_mode = 0; |
| 198 | |
| 199 | /* Non-zero means to display an asterisk at the starts of history lines |
| 200 | which have been modified. */ |
| 201 | int _rl_mark_modified_lines = 0; |
| 202 | |
| 203 | /* Non-zero means to use a visible bell if one is available rather than |
| 204 | simply ringing the terminal bell. */ |
| 205 | int _rl_prefer_visible_bell = 0; |
| 206 | |
| 207 | /* Line buffer and maintenence. */ |
| 208 | char *rl_line_buffer = (char *)NULL; |
| 209 | int rl_line_buffer_len = 0; |
| 210 | #define DEFAULT_BUFFER_SIZE 256 |
| 211 | |
| 212 | \f |
| 213 | /* **************************************************************** */ |
| 214 | /* */ |
| 215 | /* `Forward' declarations */ |
| 216 | /* */ |
| 217 | /* **************************************************************** */ |
| 218 | |
| 219 | /* Non-zero means do not parse any lines other than comments and |
| 220 | parser directives. */ |
| 221 | unsigned char _rl_parsing_conditionalized_out = 0; |
| 222 | |
| 223 | /* Non-zero means to save keys that we dispatch on in a kbd macro. */ |
| 224 | static int defining_kbd_macro = 0; |
| 225 | |
| 226 | /* Non-zero means to convert characters with the meta bit set to |
| 227 | escape-prefixed characters so we can indirect through |
| 228 | emacs_meta_keymap or vi_escape_keymap. */ |
| 229 | int _rl_convert_meta_chars_to_ascii = 1; |
| 230 | |
| 231 | /* Non-zero tells rl_delete_text and rl_insert_text to not add to |
| 232 | the undo list. */ |
| 233 | static int doing_an_undo = 0; |
| 234 | \f |
| 235 | /* **************************************************************** */ |
| 236 | /* */ |
| 237 | /* Top Level Functions */ |
| 238 | /* */ |
| 239 | /* **************************************************************** */ |
| 240 | |
| 241 | /* Non-zero means treat 0200 bit in terminal input as Meta bit. */ |
| 242 | int _rl_meta_flag = 0; /* Forward declaration */ |
| 243 | |
| 244 | /* Read a line of input. Prompt with PROMPT. A NULL PROMPT means |
| 245 | none. A return value of NULL means that EOF was encountered. */ |
| 246 | char * |
| 247 | readline (prompt) |
| 248 | char *prompt; |
| 249 | { |
| 250 | char *readline_internal (); |
| 251 | char *value; |
| 252 | |
| 253 | rl_prompt = prompt; |
| 254 | |
| 255 | /* If we are at EOF return a NULL string. */ |
| 256 | if (rl_pending_input == EOF) |
| 257 | { |
| 258 | rl_pending_input = 0; |
| 259 | return ((char *)NULL); |
| 260 | } |
| 261 | |
| 262 | rl_initialize (); |
| 263 | rl_prep_terminal (_rl_meta_flag); |
| 264 | |
| 265 | #if defined (HANDLE_SIGNALS) |
| 266 | rl_set_signals (); |
| 267 | #endif |
| 268 | |
| 269 | value = readline_internal (); |
| 270 | rl_deprep_terminal (); |
| 271 | |
| 272 | #if defined (HANDLE_SIGNALS) |
| 273 | rl_clear_signals (); |
| 274 | #endif |
| 275 | |
| 276 | return (value); |
| 277 | } |
| 278 | |
| 279 | /* Read a line of input from the global rl_instream, doing output on |
| 280 | the global rl_outstream. |
| 281 | If rl_prompt is non-null, then that is our prompt. */ |
| 282 | char * |
| 283 | readline_internal () |
| 284 | { |
| 285 | int lastc, c, eof_found; |
| 286 | |
| 287 | in_stream = rl_instream; |
| 288 | out_stream = rl_outstream; |
| 289 | |
| 290 | lastc = -1; |
| 291 | eof_found = 0; |
| 292 | |
| 293 | if (rl_startup_hook) |
| 294 | (*rl_startup_hook) (); |
| 295 | |
| 296 | if (!readline_echoing_p) |
| 297 | { |
| 298 | if (rl_prompt) |
| 299 | { |
| 300 | fprintf (out_stream, "%s", rl_prompt); |
| 301 | fflush (out_stream); |
| 302 | } |
| 303 | } |
| 304 | else |
| 305 | { |
| 306 | rl_on_new_line (); |
| 307 | rl_redisplay (); |
| 308 | #if defined (VI_MODE) |
| 309 | if (rl_editing_mode == vi_mode) |
| 310 | rl_vi_insertion_mode (); |
| 311 | #endif /* VI_MODE */ |
| 312 | } |
| 313 | |
| 314 | while (!rl_done) |
| 315 | { |
| 316 | int lk = last_command_was_kill; |
| 317 | int code; |
| 318 | |
| 319 | code = setjmp (readline_top_level); |
| 320 | |
| 321 | if (code) |
| 322 | rl_redisplay (); |
| 323 | |
| 324 | if (!rl_pending_input) |
| 325 | { |
| 326 | /* Then initialize the argument and number of keys read. */ |
| 327 | rl_init_argument (); |
| 328 | rl_key_sequence_length = 0; |
| 329 | } |
| 330 | |
| 331 | c = rl_read_key (); |
| 332 | |
| 333 | /* EOF typed to a non-blank line is a <NL>. */ |
| 334 | if (c == EOF && rl_end) |
| 335 | c = NEWLINE; |
| 336 | |
| 337 | /* The character _rl_eof_char typed to blank line, and not as the |
| 338 | previous character is interpreted as EOF. */ |
| 339 | if (((c == _rl_eof_char && lastc != c) || c == EOF) && !rl_end) |
| 340 | { |
| 341 | eof_found = 1; |
| 342 | break; |
| 343 | } |
| 344 | |
| 345 | lastc = c; |
| 346 | rl_dispatch (c, _rl_keymap); |
| 347 | |
| 348 | /* If there was no change in last_command_was_kill, then no kill |
| 349 | has taken place. Note that if input is pending we are reading |
| 350 | a prefix command, so nothing has changed yet. */ |
| 351 | if (!rl_pending_input) |
| 352 | { |
| 353 | if (lk == last_command_was_kill) |
| 354 | last_command_was_kill = 0; |
| 355 | } |
| 356 | |
| 357 | #if defined (VI_MODE) |
| 358 | /* In vi mode, when you exit insert mode, the cursor moves back |
| 359 | over the previous character. We explicitly check for that here. */ |
| 360 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap) |
| 361 | rl_vi_check (); |
| 362 | #endif /* VI_MODE */ |
| 363 | |
| 364 | if (!rl_done) |
| 365 | rl_redisplay (); |
| 366 | } |
| 367 | |
| 368 | /* Restore the original of this history line, iff the line that we |
| 369 | are editing was originally in the history, AND the line has changed. */ |
| 370 | { |
| 371 | HIST_ENTRY *entry = current_history (); |
| 372 | |
| 373 | if (entry && rl_undo_list) |
| 374 | { |
| 375 | char *temp = savestring (the_line); |
| 376 | rl_revert_line (); |
| 377 | entry = replace_history_entry (where_history (), the_line, |
| 378 | (HIST_ENTRY *)NULL); |
| 379 | free_history_entry (entry); |
| 380 | |
| 381 | strcpy (the_line, temp); |
| 382 | free (temp); |
| 383 | } |
| 384 | } |
| 385 | |
| 386 | /* At any rate, it is highly likely that this line has an undo list. Get |
| 387 | rid of it now. */ |
| 388 | if (rl_undo_list) |
| 389 | free_undo_list (); |
| 390 | |
| 391 | if (eof_found) |
| 392 | return (char *)NULL; |
| 393 | else |
| 394 | return (savestring (the_line)); |
| 395 | } |
| 396 | \f |
| 397 | /* **************************************************************** */ |
| 398 | /* */ |
| 399 | /* Character Input Buffering */ |
| 400 | /* */ |
| 401 | /* **************************************************************** */ |
| 402 | |
| 403 | static int pop_index = 0, push_index = 0, ibuffer_len = 511; |
| 404 | static unsigned char ibuffer[512]; |
| 405 | |
| 406 | /* Non-null means it is a pointer to a function to run while waiting for |
| 407 | character input. */ |
| 408 | Function *rl_event_hook = (Function *)NULL; |
| 409 | |
| 410 | #define any_typein (push_index != pop_index) |
| 411 | |
| 412 | /* Add KEY to the buffer of characters to be read. */ |
| 413 | rl_stuff_char (key) |
| 414 | int key; |
| 415 | { |
| 416 | if (key == EOF) |
| 417 | { |
| 418 | key = NEWLINE; |
| 419 | rl_pending_input = EOF; |
| 420 | } |
| 421 | ibuffer[push_index++] = key; |
| 422 | if (push_index >= ibuffer_len) |
| 423 | push_index = 0; |
| 424 | } |
| 425 | |
| 426 | /* Return the amount of space available in the |
| 427 | buffer for stuffing characters. */ |
| 428 | int |
| 429 | ibuffer_space () |
| 430 | { |
| 431 | if (pop_index > push_index) |
| 432 | return (pop_index - push_index); |
| 433 | else |
| 434 | return (ibuffer_len - (push_index - pop_index)); |
| 435 | } |
| 436 | |
| 437 | /* Get a key from the buffer of characters to be read. |
| 438 | Return the key in KEY. |
| 439 | Result is KEY if there was a key, or 0 if there wasn't. */ |
| 440 | int |
| 441 | rl_get_char (key) |
| 442 | int *key; |
| 443 | { |
| 444 | if (push_index == pop_index) |
| 445 | return (0); |
| 446 | |
| 447 | *key = ibuffer[pop_index++]; |
| 448 | |
| 449 | if (pop_index >= ibuffer_len) |
| 450 | pop_index = 0; |
| 451 | |
| 452 | return (1); |
| 453 | } |
| 454 | |
| 455 | /* Stuff KEY into the *front* of the input buffer. |
| 456 | Returns non-zero if successful, zero if there is |
| 457 | no space left in the buffer. */ |
| 458 | int |
| 459 | rl_unget_char (key) |
| 460 | int key; |
| 461 | { |
| 462 | if (ibuffer_space ()) |
| 463 | { |
| 464 | pop_index--; |
| 465 | if (pop_index < 0) |
| 466 | pop_index = ibuffer_len - 1; |
| 467 | ibuffer[pop_index] = key; |
| 468 | return (1); |
| 469 | } |
| 470 | return (0); |
| 471 | } |
| 472 | |
| 473 | /* If a character is available to be read, then read it |
| 474 | and stuff it into IBUFFER. Otherwise, just return. */ |
| 475 | void |
| 476 | rl_gather_tyi () |
| 477 | { |
| 478 | #if defined (__GO32__) |
| 479 | char input; |
| 480 | |
| 481 | if (isatty (0)) |
| 482 | { |
| 483 | int i = rl_getc (); |
| 484 | |
| 485 | if (i != EOF) |
| 486 | rl_stuff_char (i); |
| 487 | } |
| 488 | else if (kbhit () && ibuffer_space ()) |
| 489 | rl_stuff_char (getkey ()); |
| 490 | #else /* !__GO32__ */ |
| 491 | |
| 492 | int tty = fileno (in_stream); |
| 493 | register int tem, result = -1; |
| 494 | int chars_avail; |
| 495 | char input; |
| 496 | |
| 497 | #if defined (FIONREAD) |
| 498 | result = ioctl (tty, FIONREAD, &chars_avail); |
| 499 | #endif |
| 500 | |
| 501 | #if defined (O_NDELAY) |
| 502 | if (result == -1) |
| 503 | { |
| 504 | int flags; |
| 505 | |
| 506 | flags = fcntl (tty, F_GETFL, 0); |
| 507 | |
| 508 | fcntl (tty, F_SETFL, (flags | O_NDELAY)); |
| 509 | chars_avail = read (tty, &input, 1); |
| 510 | |
| 511 | fcntl (tty, F_SETFL, flags); |
| 512 | if (chars_avail == -1 && errno == EAGAIN) |
| 513 | return; |
| 514 | } |
| 515 | #endif /* O_NDELAY */ |
| 516 | |
| 517 | /* If there's nothing available, don't waste time trying to read |
| 518 | something. */ |
| 519 | if (chars_avail == 0) |
| 520 | return; |
| 521 | |
| 522 | tem = ibuffer_space (); |
| 523 | |
| 524 | if (chars_avail > tem) |
| 525 | chars_avail = tem; |
| 526 | |
| 527 | /* One cannot read all of the available input. I can only read a single |
| 528 | character at a time, or else programs which require input can be |
| 529 | thwarted. If the buffer is larger than one character, I lose. |
| 530 | Damn! */ |
| 531 | if (tem < ibuffer_len) |
| 532 | chars_avail = 0; |
| 533 | |
| 534 | if (result != -1) |
| 535 | { |
| 536 | while (chars_avail--) |
| 537 | rl_stuff_char (rl_getc (in_stream)); |
| 538 | } |
| 539 | else |
| 540 | { |
| 541 | if (chars_avail) |
| 542 | rl_stuff_char (input); |
| 543 | } |
| 544 | #endif /* !__GO32__ */ |
| 545 | } |
| 546 | |
| 547 | static int next_macro_key (); |
| 548 | /* Read a key, including pending input. */ |
| 549 | int |
| 550 | rl_read_key () |
| 551 | { |
| 552 | int c; |
| 553 | |
| 554 | rl_key_sequence_length++; |
| 555 | |
| 556 | if (rl_pending_input) |
| 557 | { |
| 558 | c = rl_pending_input; |
| 559 | rl_pending_input = 0; |
| 560 | } |
| 561 | else |
| 562 | { |
| 563 | /* If input is coming from a macro, then use that. */ |
| 564 | if (c = next_macro_key ()) |
| 565 | return (c); |
| 566 | |
| 567 | /* If the user has an event function, then call it periodically. */ |
| 568 | if (rl_event_hook) |
| 569 | { |
| 570 | while (rl_event_hook && !rl_get_char (&c)) |
| 571 | { |
| 572 | (*rl_event_hook) (); |
| 573 | rl_gather_tyi (); |
| 574 | } |
| 575 | } |
| 576 | else |
| 577 | { |
| 578 | if (!rl_get_char (&c)) |
| 579 | c = rl_getc (in_stream); |
| 580 | } |
| 581 | } |
| 582 | |
| 583 | return (c); |
| 584 | } |
| 585 | |
| 586 | /* Found later in this file. */ |
| 587 | static void add_macro_char (), with_macro_input (); |
| 588 | |
| 589 | /* Do the command associated with KEY in MAP. |
| 590 | If the associated command is really a keymap, then read |
| 591 | another key, and dispatch into that map. */ |
| 592 | void |
| 593 | rl_dispatch (key, map) |
| 594 | register int key; |
| 595 | Keymap map; |
| 596 | { |
| 597 | #if defined (VI_MODE) |
| 598 | extern int _rl_vi_last_command, _rl_vi_last_repeat, _rl_vi_last_arg_sign; |
| 599 | #endif |
| 600 | |
| 601 | if (defining_kbd_macro) |
| 602 | add_macro_char (key); |
| 603 | |
| 604 | if (META_CHAR (key) && _rl_convert_meta_chars_to_ascii) |
| 605 | { |
| 606 | if (map[ESC].type == ISKMAP) |
| 607 | { |
| 608 | #if defined (CRAY) |
| 609 | map = (Keymap)((int)map[ESC].function); |
| 610 | #else |
| 611 | map = (Keymap)map[ESC].function; |
| 612 | #endif |
| 613 | key = UNMETA (key); |
| 614 | rl_key_sequence_length += 2; |
| 615 | rl_dispatch (key, map); |
| 616 | } |
| 617 | else |
| 618 | ding (); |
| 619 | return; |
| 620 | } |
| 621 | |
| 622 | switch (map[key].type) |
| 623 | { |
| 624 | case ISFUNC: |
| 625 | { |
| 626 | Function *func = map[key].function; |
| 627 | |
| 628 | if (func != (Function *)NULL) |
| 629 | { |
| 630 | /* Special case rl_do_lowercase_version (). */ |
| 631 | if (func == rl_do_lowercase_version) |
| 632 | { |
| 633 | rl_dispatch (to_lower (key), map); |
| 634 | return; |
| 635 | } |
| 636 | |
| 637 | (*map[key].function)(rl_numeric_arg * rl_arg_sign, key); |
| 638 | |
| 639 | /* If we have input pending, then the last command was a prefix |
| 640 | command. Don't change the state of rl_last_func. Otherwise, |
| 641 | remember the last command executed in this variable. */ |
| 642 | if (!rl_pending_input) |
| 643 | rl_last_func = map[key].function; |
| 644 | } |
| 645 | else |
| 646 | { |
| 647 | rl_abort (); |
| 648 | return; |
| 649 | } |
| 650 | } |
| 651 | break; |
| 652 | |
| 653 | case ISKMAP: |
| 654 | if (map[key].function != (Function *)NULL) |
| 655 | { |
| 656 | int newkey; |
| 657 | |
| 658 | rl_key_sequence_length++; |
| 659 | newkey = rl_read_key (); |
| 660 | #if defined (CRAY) |
| 661 | /* If you cast map[key].function to type (Keymap) on a Cray, |
| 662 | the compiler takes the value of may[key].function and |
| 663 | divides it by 4 to convert between pointer types (pointers |
| 664 | to functions and pointers to structs are different sizes). |
| 665 | This is not what is wanted. */ |
| 666 | rl_dispatch (newkey, (Keymap)((int)map[key].function)); |
| 667 | #else |
| 668 | rl_dispatch (newkey, (Keymap)map[key].function); |
| 669 | #endif /* !CRAY */ |
| 670 | } |
| 671 | else |
| 672 | { |
| 673 | rl_abort (); |
| 674 | return; |
| 675 | } |
| 676 | break; |
| 677 | |
| 678 | case ISMACR: |
| 679 | if (map[key].function != (Function *)NULL) |
| 680 | { |
| 681 | char *macro; |
| 682 | |
| 683 | macro = savestring ((char *)map[key].function); |
| 684 | with_macro_input (macro); |
| 685 | return; |
| 686 | } |
| 687 | break; |
| 688 | } |
| 689 | #if defined (VI_MODE) |
| 690 | if (rl_editing_mode == vi_mode && _rl_keymap == vi_movement_keymap && |
| 691 | rl_vi_textmod_command (key)) |
| 692 | { |
| 693 | _rl_vi_last_command = key; |
| 694 | _rl_vi_last_repeat = rl_numeric_arg; |
| 695 | _rl_vi_last_arg_sign = rl_arg_sign; |
| 696 | } |
| 697 | #endif |
| 698 | } |
| 699 | |
| 700 | \f |
| 701 | /* **************************************************************** */ |
| 702 | /* */ |
| 703 | /* Hacking Keyboard Macros */ |
| 704 | /* */ |
| 705 | /* **************************************************************** */ |
| 706 | |
| 707 | /* The currently executing macro string. If this is non-zero, |
| 708 | then it is a malloc ()'ed string where input is coming from. */ |
| 709 | static char *executing_macro = (char *)NULL; |
| 710 | |
| 711 | /* The offset in the above string to the next character to be read. */ |
| 712 | static int executing_macro_index = 0; |
| 713 | |
| 714 | /* The current macro string being built. Characters get stuffed |
| 715 | in here by add_macro_char (). */ |
| 716 | static char *current_macro = (char *)NULL; |
| 717 | |
| 718 | /* The size of the buffer allocated to current_macro. */ |
| 719 | static int current_macro_size = 0; |
| 720 | |
| 721 | /* The index at which characters are being added to current_macro. */ |
| 722 | static int current_macro_index = 0; |
| 723 | |
| 724 | /* A structure used to save nested macro strings. |
| 725 | It is a linked list of string/index for each saved macro. */ |
| 726 | struct saved_macro { |
| 727 | struct saved_macro *next; |
| 728 | char *string; |
| 729 | int index; |
| 730 | }; |
| 731 | |
| 732 | /* The list of saved macros. */ |
| 733 | struct saved_macro *macro_list = (struct saved_macro *)NULL; |
| 734 | |
| 735 | /* Forward declarations of static functions. Thank you C. */ |
| 736 | static void push_executing_macro (), pop_executing_macro (); |
| 737 | |
| 738 | /* This one has to be declared earlier in the file. */ |
| 739 | /* static void add_macro_char (); */ |
| 740 | |
| 741 | /* Set up to read subsequent input from STRING. |
| 742 | STRING is free ()'ed when we are done with it. */ |
| 743 | static void |
| 744 | with_macro_input (string) |
| 745 | char *string; |
| 746 | { |
| 747 | push_executing_macro (); |
| 748 | executing_macro = string; |
| 749 | executing_macro_index = 0; |
| 750 | } |
| 751 | |
| 752 | /* Return the next character available from a macro, or 0 if |
| 753 | there are no macro characters. */ |
| 754 | static int |
| 755 | next_macro_key () |
| 756 | { |
| 757 | if (!executing_macro) |
| 758 | return (0); |
| 759 | |
| 760 | if (!executing_macro[executing_macro_index]) |
| 761 | { |
| 762 | pop_executing_macro (); |
| 763 | return (next_macro_key ()); |
| 764 | } |
| 765 | |
| 766 | return (executing_macro[executing_macro_index++]); |
| 767 | } |
| 768 | |
| 769 | /* Save the currently executing macro on a stack of saved macros. */ |
| 770 | static void |
| 771 | push_executing_macro () |
| 772 | { |
| 773 | struct saved_macro *saver; |
| 774 | |
| 775 | saver = (struct saved_macro *)xmalloc (sizeof (struct saved_macro)); |
| 776 | saver->next = macro_list; |
| 777 | saver->index = executing_macro_index; |
| 778 | saver->string = executing_macro; |
| 779 | |
| 780 | macro_list = saver; |
| 781 | } |
| 782 | |
| 783 | /* Discard the current macro, replacing it with the one |
| 784 | on the top of the stack of saved macros. */ |
| 785 | static void |
| 786 | pop_executing_macro () |
| 787 | { |
| 788 | if (executing_macro) |
| 789 | free (executing_macro); |
| 790 | |
| 791 | executing_macro = (char *)NULL; |
| 792 | executing_macro_index = 0; |
| 793 | |
| 794 | if (macro_list) |
| 795 | { |
| 796 | struct saved_macro *disposer = macro_list; |
| 797 | executing_macro = macro_list->string; |
| 798 | executing_macro_index = macro_list->index; |
| 799 | macro_list = macro_list->next; |
| 800 | free (disposer); |
| 801 | } |
| 802 | } |
| 803 | |
| 804 | /* Add a character to the macro being built. */ |
| 805 | static void |
| 806 | add_macro_char (c) |
| 807 | int c; |
| 808 | { |
| 809 | if (current_macro_index + 1 >= current_macro_size) |
| 810 | { |
| 811 | if (!current_macro) |
| 812 | current_macro = (char *)xmalloc (current_macro_size = 25); |
| 813 | else |
| 814 | current_macro = |
| 815 | (char *)xrealloc (current_macro, current_macro_size += 25); |
| 816 | } |
| 817 | |
| 818 | current_macro[current_macro_index++] = c; |
| 819 | current_macro[current_macro_index] = '\0'; |
| 820 | } |
| 821 | |
| 822 | /* Begin defining a keyboard macro. |
| 823 | Keystrokes are recorded as they are executed. |
| 824 | End the definition with rl_end_kbd_macro (). |
| 825 | If a numeric argument was explicitly typed, then append this |
| 826 | definition to the end of the existing macro, and start by |
| 827 | re-executing the existing macro. */ |
| 828 | rl_start_kbd_macro (ignore1, ignore2) |
| 829 | int ignore1, ignore2; |
| 830 | { |
| 831 | if (defining_kbd_macro) |
| 832 | rl_abort (); |
| 833 | |
| 834 | if (rl_explicit_arg) |
| 835 | { |
| 836 | if (current_macro) |
| 837 | with_macro_input (savestring (current_macro)); |
| 838 | } |
| 839 | else |
| 840 | current_macro_index = 0; |
| 841 | |
| 842 | defining_kbd_macro = 1; |
| 843 | } |
| 844 | |
| 845 | /* Stop defining a keyboard macro. |
| 846 | A numeric argument says to execute the macro right now, |
| 847 | that many times, counting the definition as the first time. */ |
| 848 | rl_end_kbd_macro (count, ignore) |
| 849 | int count, ignore; |
| 850 | { |
| 851 | if (!defining_kbd_macro) |
| 852 | rl_abort (); |
| 853 | |
| 854 | current_macro_index -= (rl_key_sequence_length - 1); |
| 855 | current_macro[current_macro_index] = '\0'; |
| 856 | |
| 857 | defining_kbd_macro = 0; |
| 858 | |
| 859 | rl_call_last_kbd_macro (--count, 0); |
| 860 | } |
| 861 | |
| 862 | /* Execute the most recently defined keyboard macro. |
| 863 | COUNT says how many times to execute it. */ |
| 864 | rl_call_last_kbd_macro (count, ignore) |
| 865 | int count, ignore; |
| 866 | { |
| 867 | if (!current_macro) |
| 868 | rl_abort (); |
| 869 | |
| 870 | if (defining_kbd_macro) |
| 871 | { |
| 872 | ding (); /* no recursive macros */ |
| 873 | current_macro[--current_macro_index] = '\0'; /* erase this char */ |
| 874 | return 0; |
| 875 | } |
| 876 | |
| 877 | while (count--) |
| 878 | with_macro_input (savestring (current_macro)); |
| 879 | } |
| 880 | |
| 881 | void |
| 882 | _rl_kill_kbd_macro () |
| 883 | { |
| 884 | if (current_macro) |
| 885 | { |
| 886 | free (current_macro); |
| 887 | current_macro = (char *) NULL; |
| 888 | } |
| 889 | current_macro_size = current_macro_index = 0; |
| 890 | |
| 891 | if (executing_macro) |
| 892 | { |
| 893 | free (executing_macro); |
| 894 | executing_macro = (char *) NULL; |
| 895 | } |
| 896 | executing_macro_index = 0; |
| 897 | |
| 898 | defining_kbd_macro = 0; |
| 899 | } |
| 900 | |
| 901 | \f |
| 902 | /* **************************************************************** */ |
| 903 | /* */ |
| 904 | /* Initializations */ |
| 905 | /* */ |
| 906 | /* **************************************************************** */ |
| 907 | |
| 908 | /* Initliaze readline (and terminal if not already). */ |
| 909 | rl_initialize () |
| 910 | { |
| 911 | /* If we have never been called before, initialize the |
| 912 | terminal and data structures. */ |
| 913 | if (!rl_initialized) |
| 914 | { |
| 915 | readline_initialize_everything (); |
| 916 | rl_initialized++; |
| 917 | } |
| 918 | |
| 919 | /* Initalize the current line information. */ |
| 920 | rl_point = rl_end = 0; |
| 921 | the_line = rl_line_buffer; |
| 922 | the_line[0] = 0; |
| 923 | |
| 924 | /* We aren't done yet. We haven't even gotten started yet! */ |
| 925 | rl_done = 0; |
| 926 | |
| 927 | /* Tell the history routines what is going on. */ |
| 928 | start_using_history (); |
| 929 | |
| 930 | /* Make the display buffer match the state of the line. */ |
| 931 | rl_reset_line_state (); |
| 932 | |
| 933 | /* No such function typed yet. */ |
| 934 | rl_last_func = (Function *)NULL; |
| 935 | |
| 936 | /* Parsing of key-bindings begins in an enabled state. */ |
| 937 | _rl_parsing_conditionalized_out = 0; |
| 938 | } |
| 939 | |
| 940 | /* Initialize the entire state of the world. */ |
| 941 | readline_initialize_everything () |
| 942 | { |
| 943 | /* Find out if we are running in Emacs. */ |
| 944 | running_in_emacs = getenv ("EMACS"); |
| 945 | |
| 946 | /* Set up input and output if they are not already set up. */ |
| 947 | if (!rl_instream) |
| 948 | rl_instream = stdin; |
| 949 | |
| 950 | if (!rl_outstream) |
| 951 | rl_outstream = stdout; |
| 952 | |
| 953 | /* Bind in_stream and out_stream immediately. These values may change, |
| 954 | but they may also be used before readline_internal () is called. */ |
| 955 | in_stream = rl_instream; |
| 956 | out_stream = rl_outstream; |
| 957 | |
| 958 | /* Allocate data structures. */ |
| 959 | if (!rl_line_buffer) |
| 960 | rl_line_buffer = |
| 961 | (char *)xmalloc (rl_line_buffer_len = DEFAULT_BUFFER_SIZE); |
| 962 | |
| 963 | /* Initialize the terminal interface. */ |
| 964 | init_terminal_io ((char *)NULL); |
| 965 | |
| 966 | #if !defined (__GO32__) |
| 967 | /* Bind tty characters to readline functions. */ |
| 968 | readline_default_bindings (); |
| 969 | #endif /* !__GO32__ */ |
| 970 | |
| 971 | /* Initialize the function names. */ |
| 972 | rl_initialize_funmap (); |
| 973 | |
| 974 | /* Read in the init file. */ |
| 975 | rl_read_init_file ((char *)NULL); |
| 976 | |
| 977 | /* If the completion parser's default word break characters haven't |
| 978 | been set yet, then do so now. */ |
| 979 | { |
| 980 | if (rl_completer_word_break_characters == (char *)NULL) |
| 981 | rl_completer_word_break_characters = rl_basic_word_break_characters; |
| 982 | } |
| 983 | } |
| 984 | |
| 985 | /* If this system allows us to look at the values of the regular |
| 986 | input editing characters, then bind them to their readline |
| 987 | equivalents, iff the characters are not bound to keymaps. */ |
| 988 | #if !defined (__GO32__) |
| 989 | static void |
| 990 | readline_default_bindings () |
| 991 | { |
| 992 | rltty_set_default_bindings (_rl_keymap); |
| 993 | } |
| 994 | #endif /* !__GO32__ */ |
| 995 | |
| 996 | \f |
| 997 | /* **************************************************************** */ |
| 998 | /* */ |
| 999 | /* Numeric Arguments */ |
| 1000 | /* */ |
| 1001 | /* **************************************************************** */ |
| 1002 | |
| 1003 | /* Handle C-u style numeric args, as well as M--, and M-digits. */ |
| 1004 | |
| 1005 | /* Add the current digit to the argument in progress. */ |
| 1006 | rl_digit_argument (ignore, key) |
| 1007 | int ignore, key; |
| 1008 | { |
| 1009 | rl_pending_input = key; |
| 1010 | rl_digit_loop (); |
| 1011 | } |
| 1012 | |
| 1013 | /* What to do when you abort reading an argument. */ |
| 1014 | rl_discard_argument () |
| 1015 | { |
| 1016 | ding (); |
| 1017 | rl_clear_message (); |
| 1018 | rl_init_argument (); |
| 1019 | } |
| 1020 | |
| 1021 | /* Create a default argument. */ |
| 1022 | rl_init_argument () |
| 1023 | { |
| 1024 | rl_numeric_arg = rl_arg_sign = 1; |
| 1025 | rl_explicit_arg = 0; |
| 1026 | } |
| 1027 | |
| 1028 | /* C-u, universal argument. Multiply the current argument by 4. |
| 1029 | Read a key. If the key has nothing to do with arguments, then |
| 1030 | dispatch on it. If the key is the abort character then abort. */ |
| 1031 | rl_universal_argument () |
| 1032 | { |
| 1033 | rl_numeric_arg *= 4; |
| 1034 | rl_digit_loop (); |
| 1035 | } |
| 1036 | |
| 1037 | rl_digit_loop () |
| 1038 | { |
| 1039 | int key, c; |
| 1040 | while (1) |
| 1041 | { |
| 1042 | rl_message ("(arg: %d) ", rl_arg_sign * rl_numeric_arg); |
| 1043 | key = c = rl_read_key (); |
| 1044 | |
| 1045 | if (_rl_keymap[c].type == ISFUNC && |
| 1046 | _rl_keymap[c].function == rl_universal_argument) |
| 1047 | { |
| 1048 | rl_numeric_arg *= 4; |
| 1049 | continue; |
| 1050 | } |
| 1051 | c = UNMETA (c); |
| 1052 | if (numeric (c)) |
| 1053 | { |
| 1054 | if (rl_explicit_arg) |
| 1055 | rl_numeric_arg = (rl_numeric_arg * 10) + (c - '0'); |
| 1056 | else |
| 1057 | rl_numeric_arg = (c - '0'); |
| 1058 | rl_explicit_arg = 1; |
| 1059 | } |
| 1060 | else |
| 1061 | { |
| 1062 | if (c == '-' && !rl_explicit_arg) |
| 1063 | { |
| 1064 | rl_numeric_arg = 1; |
| 1065 | rl_arg_sign = -1; |
| 1066 | } |
| 1067 | else |
| 1068 | { |
| 1069 | rl_clear_message (); |
| 1070 | rl_dispatch (key, _rl_keymap); |
| 1071 | return; |
| 1072 | } |
| 1073 | } |
| 1074 | } |
| 1075 | } |
| 1076 | \f |
| 1077 | /* **************************************************************** */ |
| 1078 | /* */ |
| 1079 | /* Terminal and Termcap */ |
| 1080 | /* */ |
| 1081 | /* **************************************************************** */ |
| 1082 | |
| 1083 | static char *term_buffer = (char *)NULL; |
| 1084 | static char *term_string_buffer = (char *)NULL; |
| 1085 | |
| 1086 | /* Non-zero means this terminal can't really do anything. */ |
| 1087 | int dumb_term = 0; |
| 1088 | /* On Solaris2, sys/types.h #includes sys/reg.h, which #defines PC. |
| 1089 | Unfortunately, PC is a global variable used by the termcap library. */ |
| 1090 | #undef PC |
| 1091 | |
| 1092 | #if !defined (__linux__) |
| 1093 | char PC; |
| 1094 | char *BC, *UP; |
| 1095 | #endif /* __linux__ */ |
| 1096 | |
| 1097 | /* Some strings to control terminal actions. These are output by tputs (). */ |
| 1098 | char *term_goto, *term_clreol, *term_cr, *term_clrpag, *term_backspace; |
| 1099 | |
| 1100 | int screenwidth, screenheight; |
| 1101 | |
| 1102 | /* Non-zero if we determine that the terminal can do character insertion. */ |
| 1103 | int terminal_can_insert = 0; |
| 1104 | |
| 1105 | /* How to insert characters. */ |
| 1106 | char *term_im, *term_ei, *term_ic, *term_ip, *term_IC; |
| 1107 | |
| 1108 | /* How to delete characters. */ |
| 1109 | char *term_dc, *term_DC; |
| 1110 | |
| 1111 | #if defined (HACK_TERMCAP_MOTION) |
| 1112 | char *term_forward_char; |
| 1113 | #endif /* HACK_TERMCAP_MOTION */ |
| 1114 | |
| 1115 | /* How to go up a line. */ |
| 1116 | char *term_up; |
| 1117 | |
| 1118 | /* True if we have funny auto-line-wrap ("am" and "xn"). */ |
| 1119 | int term_xn; |
| 1120 | |
| 1121 | /* A visible bell, if the terminal can be made to flash the screen. */ |
| 1122 | char *visible_bell; |
| 1123 | |
| 1124 | /* Non-zero means that this terminal has a meta key. */ |
| 1125 | int term_has_meta; |
| 1126 | |
| 1127 | /* The string to write to turn on the meta key, if this term has one. */ |
| 1128 | char *term_mm; |
| 1129 | |
| 1130 | /* The string to write to turn off the meta key, if this term has one. */ |
| 1131 | char *term_mo; |
| 1132 | |
| 1133 | /* The key sequences output by the arrow keys, if this terminal has any. */ |
| 1134 | char *term_ku, *term_kd, *term_kr, *term_kl; |
| 1135 | |
| 1136 | /* Re-initialize the terminal considering that the TERM/TERMCAP variable |
| 1137 | has changed. */ |
| 1138 | rl_reset_terminal (terminal_name) |
| 1139 | char *terminal_name; |
| 1140 | { |
| 1141 | init_terminal_io (terminal_name); |
| 1142 | } |
| 1143 | |
| 1144 | /* Set readline's idea of the screen size. TTY is a file descriptor open |
| 1145 | to the terminal. If IGNORE_ENV is true, we do not pay attention to the |
| 1146 | values of $LINES and $COLUMNS. The tests for TERM_STRING_BUFFER being |
| 1147 | non-null serve to check whether or not we have initialized termcap. */ |
| 1148 | void |
| 1149 | _rl_set_screen_size (tty, ignore_env) |
| 1150 | int tty, ignore_env; |
| 1151 | { |
| 1152 | #if defined (TIOCGWINSZ) && !defined (TIOCGWINSZ_BROKEN) |
| 1153 | struct winsize window_size; |
| 1154 | #endif /* TIOCGWINSZ */ |
| 1155 | |
| 1156 | #if defined (TIOCGWINSZ) && !defined (TIOCGWINSZ_BROKEN) |
| 1157 | if (ioctl (tty, TIOCGWINSZ, &window_size) == 0) |
| 1158 | { |
| 1159 | screenwidth = (int) window_size.ws_col; |
| 1160 | screenheight = (int) window_size.ws_row; |
| 1161 | } |
| 1162 | #endif /* TIOCGWINSZ */ |
| 1163 | |
| 1164 | /* Environment variable COLUMNS overrides setting of "co" if IGNORE_ENV |
| 1165 | is unset. */ |
| 1166 | if (screenwidth <= 0) |
| 1167 | { |
| 1168 | char *sw; |
| 1169 | |
| 1170 | if (!ignore_env && (sw = getenv ("COLUMNS"))) |
| 1171 | screenwidth = atoi (sw); |
| 1172 | |
| 1173 | if (screenwidth <= 0 && term_string_buffer) |
| 1174 | screenwidth = tgetnum ("co"); |
| 1175 | } |
| 1176 | |
| 1177 | /* Environment variable LINES overrides setting of "li" if IGNORE_ENV |
| 1178 | is unset. */ |
| 1179 | if (screenheight <= 0) |
| 1180 | { |
| 1181 | char *sh; |
| 1182 | |
| 1183 | if (!ignore_env && (sh = getenv ("LINES"))) |
| 1184 | screenheight = atoi (sh); |
| 1185 | |
| 1186 | if (screenheight <= 0 && term_string_buffer) |
| 1187 | screenheight = tgetnum ("li"); |
| 1188 | } |
| 1189 | |
| 1190 | /* If all else fails, default to 80x24 terminal. */ |
| 1191 | if (screenwidth <= 0) |
| 1192 | screenwidth = 80; |
| 1193 | |
| 1194 | if (screenheight <= 0) |
| 1195 | screenheight = 24; |
| 1196 | |
| 1197 | #if defined (SHELL) |
| 1198 | /* If we're being compiled as part of bash, set the environment |
| 1199 | variables $LINES and $COLUMNS to new values. */ |
| 1200 | set_lines_and_columns (screenheight, screenwidth); |
| 1201 | #endif |
| 1202 | |
| 1203 | /* If we don't have xn (most modern terminals do), |
| 1204 | don't use the last column. */ |
| 1205 | if (!term_xn) |
| 1206 | screenwidth--; |
| 1207 | } |
| 1208 | |
| 1209 | init_terminal_io (terminal_name) |
| 1210 | char *terminal_name; |
| 1211 | { |
| 1212 | #if defined (__GO32__) |
| 1213 | screenwidth = ScreenCols (); |
| 1214 | screenheight = ScreenRows (); |
| 1215 | term_cr = "\r"; |
| 1216 | term_im = term_ei = term_ic = term_IC = (char *)NULL; |
| 1217 | term_up = term_dc = term_DC = visible_bell = (char *)NULL; |
| 1218 | |
| 1219 | /* Does the __GO32__ have a meta key? I don't know. */ |
| 1220 | term_has_meta = 0; |
| 1221 | term_mm = term_mo = (char *)NULL; |
| 1222 | |
| 1223 | /* It probably has arrow keys, but I don't know what they are. */ |
| 1224 | term_ku = term_kd = term_kr = term_kl = (char *)NULL; |
| 1225 | |
| 1226 | #if defined (HACK_TERMCAP_MOTION) |
| 1227 | term_forward_char = (char *)NULL; |
| 1228 | #endif /* HACK_TERMCAP_MOTION */ |
| 1229 | terminal_can_insert = term_xn = 0; |
| 1230 | return; |
| 1231 | #else /* !__GO32__ */ |
| 1232 | |
| 1233 | char *term, *buffer; |
| 1234 | int tty; |
| 1235 | |
| 1236 | term = terminal_name ? terminal_name : getenv ("TERM"); |
| 1237 | |
| 1238 | if (!term_string_buffer) |
| 1239 | term_string_buffer = (char *)xmalloc (2048); |
| 1240 | |
| 1241 | if (!term_buffer) |
| 1242 | term_buffer = (char *)xmalloc (2048); |
| 1243 | |
| 1244 | buffer = term_string_buffer; |
| 1245 | |
| 1246 | term_clrpag = term_cr = term_clreol = (char *)NULL; |
| 1247 | |
| 1248 | if (!term) |
| 1249 | term = "dumb"; |
| 1250 | |
| 1251 | if (tgetent (term_buffer, term) <= 0) |
| 1252 | { |
| 1253 | dumb_term = 1; |
| 1254 | screenwidth = 79; |
| 1255 | screenheight = 24; |
| 1256 | term_cr = "\r"; |
| 1257 | term_im = term_ei = term_ic = term_IC = (char *)NULL; |
| 1258 | term_up = term_dc = term_DC = visible_bell = (char *)NULL; |
| 1259 | term_ku = term_kd = term_kl = term_kr = (char *)NULL; |
| 1260 | #if defined (HACK_TERMCAP_MOTION) |
| 1261 | term_forward_char = (char *)NULL; |
| 1262 | #endif |
| 1263 | terminal_can_insert = term_xn = 0; |
| 1264 | return; |
| 1265 | } |
| 1266 | |
| 1267 | BC = tgetstr ("pc", &buffer); |
| 1268 | PC = buffer ? *buffer : 0; |
| 1269 | |
| 1270 | term_backspace = tgetstr ("le", &buffer); |
| 1271 | |
| 1272 | term_cr = tgetstr ("cr", &buffer); |
| 1273 | term_clreol = tgetstr ("ce", &buffer); |
| 1274 | term_clrpag = tgetstr ("cl", &buffer); |
| 1275 | |
| 1276 | if (!term_cr) |
| 1277 | term_cr = "\r"; |
| 1278 | |
| 1279 | #if defined (HACK_TERMCAP_MOTION) |
| 1280 | term_forward_char = tgetstr ("nd", &buffer); |
| 1281 | #endif /* HACK_TERMCAP_MOTION */ |
| 1282 | |
| 1283 | if (rl_instream) |
| 1284 | tty = fileno (rl_instream); |
| 1285 | else |
| 1286 | tty = 0; |
| 1287 | |
| 1288 | screenwidth = screenheight = 0; |
| 1289 | |
| 1290 | term_xn = tgetflag ("am") && tgetflag ("xn"); |
| 1291 | |
| 1292 | _rl_set_screen_size (tty, 0); |
| 1293 | |
| 1294 | term_im = tgetstr ("im", &buffer); |
| 1295 | term_ei = tgetstr ("ei", &buffer); |
| 1296 | term_IC = tgetstr ("IC", &buffer); |
| 1297 | term_ic = tgetstr ("ic", &buffer); |
| 1298 | |
| 1299 | /* "An application program can assume that the terminal can do |
| 1300 | character insertion if *any one of* the capabilities `IC', |
| 1301 | `im', `ic' or `ip' is provided." But we can't do anything if |
| 1302 | only `ip' is provided, so... */ |
| 1303 | terminal_can_insert = (term_IC || term_im || term_ic); |
| 1304 | |
| 1305 | term_up = tgetstr ("up", &buffer); |
| 1306 | term_dc = tgetstr ("dc", &buffer); |
| 1307 | term_DC = tgetstr ("DC", &buffer); |
| 1308 | |
| 1309 | visible_bell = tgetstr ("vb", &buffer); |
| 1310 | |
| 1311 | /* Check to see if this terminal has a meta key. */ |
| 1312 | term_has_meta = (tgetflag ("km") || tgetflag ("MT")); |
| 1313 | if (term_has_meta) |
| 1314 | { |
| 1315 | term_mm = tgetstr ("mm", &buffer); |
| 1316 | term_mo = tgetstr ("mo", &buffer); |
| 1317 | } |
| 1318 | else |
| 1319 | { |
| 1320 | term_mm = (char *)NULL; |
| 1321 | term_mo = (char *)NULL; |
| 1322 | } |
| 1323 | |
| 1324 | /* Attempt to find and bind the arrow keys. Do not override already |
| 1325 | bound keys in an overzealous attempt, however. */ |
| 1326 | term_ku = tgetstr ("ku", &buffer); |
| 1327 | term_kd = tgetstr ("kd", &buffer); |
| 1328 | term_kr = tgetstr ("kr", &buffer); |
| 1329 | term_kl = tgetstr ("kl", &buffer); |
| 1330 | |
| 1331 | if (term_ku) |
| 1332 | { |
| 1333 | Function *func; |
| 1334 | |
| 1335 | func = rl_function_of_keyseq (term_ku, _rl_keymap, (int *)NULL); |
| 1336 | |
| 1337 | if (!func || func == rl_do_lowercase_version) |
| 1338 | rl_set_key (term_ku, rl_get_previous_history, _rl_keymap); |
| 1339 | } |
| 1340 | |
| 1341 | if (term_kd) |
| 1342 | { |
| 1343 | Function *func; |
| 1344 | |
| 1345 | func = rl_function_of_keyseq (term_kd, _rl_keymap, (int *)NULL); |
| 1346 | |
| 1347 | if (!func || func == rl_do_lowercase_version) |
| 1348 | rl_set_key (term_kd, rl_get_next_history, _rl_keymap); |
| 1349 | } |
| 1350 | |
| 1351 | if (term_kr) |
| 1352 | { |
| 1353 | Function *func; |
| 1354 | |
| 1355 | func = rl_function_of_keyseq (term_kr, _rl_keymap, (int *)NULL); |
| 1356 | |
| 1357 | if (!func || func == rl_do_lowercase_version) |
| 1358 | rl_set_key (term_kr, rl_forward, _rl_keymap); |
| 1359 | } |
| 1360 | |
| 1361 | if (term_kl) |
| 1362 | { |
| 1363 | Function *func; |
| 1364 | |
| 1365 | func = rl_function_of_keyseq (term_kl, _rl_keymap, (int *)NULL); |
| 1366 | |
| 1367 | if (!func || func == rl_do_lowercase_version) |
| 1368 | rl_set_key (term_kl, rl_backward, _rl_keymap); |
| 1369 | } |
| 1370 | #endif /* !__GO32__ */ |
| 1371 | return 0; |
| 1372 | } |
| 1373 | |
| 1374 | /* A function for the use of tputs () */ |
| 1375 | int |
| 1376 | _rl_output_character_function (c) |
| 1377 | int c; |
| 1378 | { |
| 1379 | return putc (c, out_stream); |
| 1380 | } |
| 1381 | |
| 1382 | /* Write COUNT characters from STRING to the output stream. */ |
| 1383 | void |
| 1384 | _rl_output_some_chars (string, count) |
| 1385 | char *string; |
| 1386 | int count; |
| 1387 | { |
| 1388 | fwrite (string, 1, count, out_stream); |
| 1389 | } |
| 1390 | |
| 1391 | /* Move the cursor back. */ |
| 1392 | backspace (count) |
| 1393 | int count; |
| 1394 | { |
| 1395 | register int i; |
| 1396 | |
| 1397 | #if !defined (__GO32__) |
| 1398 | if (term_backspace) |
| 1399 | for (i = 0; i < count; i++) |
| 1400 | tputs (term_backspace, 1, _rl_output_character_function); |
| 1401 | else |
| 1402 | #endif /* !__GO32__ */ |
| 1403 | for (i = 0; i < count; i++) |
| 1404 | putc ('\b', out_stream); |
| 1405 | } |
| 1406 | |
| 1407 | /* Move to the start of the next line. */ |
| 1408 | crlf () |
| 1409 | { |
| 1410 | #if defined (NEW_TTY_DRIVER) |
| 1411 | tputs (term_cr, 1, _rl_output_character_function); |
| 1412 | #endif /* NEW_TTY_DRIVER */ |
| 1413 | putc ('\n', out_stream); |
| 1414 | } |
| 1415 | |
| 1416 | \f |
| 1417 | /* **************************************************************** */ |
| 1418 | /* */ |
| 1419 | /* Utility Functions */ |
| 1420 | /* */ |
| 1421 | /* **************************************************************** */ |
| 1422 | |
| 1423 | /* Return 0 if C is not a member of the class of characters that belong |
| 1424 | in words, or 1 if it is. */ |
| 1425 | |
| 1426 | int allow_pathname_alphabetic_chars = 0; |
| 1427 | char *pathname_alphabetic_chars = "/-_=~.#$"; |
| 1428 | |
| 1429 | int |
| 1430 | alphabetic (c) |
| 1431 | int c; |
| 1432 | { |
| 1433 | if (pure_alphabetic (c) || (numeric (c))) |
| 1434 | return (1); |
| 1435 | |
| 1436 | if (allow_pathname_alphabetic_chars) |
| 1437 | return (strchr (pathname_alphabetic_chars, c) != NULL); |
| 1438 | else |
| 1439 | return (0); |
| 1440 | } |
| 1441 | |
| 1442 | /* Return non-zero if C is a numeric character. */ |
| 1443 | int |
| 1444 | numeric (c) |
| 1445 | int c; |
| 1446 | { |
| 1447 | return (c >= '0' && c <= '9'); |
| 1448 | } |
| 1449 | |
| 1450 | /* Ring the terminal bell. */ |
| 1451 | int |
| 1452 | ding () |
| 1453 | { |
| 1454 | if (readline_echoing_p) |
| 1455 | { |
| 1456 | #if !defined (__GO32__) |
| 1457 | if (_rl_prefer_visible_bell && visible_bell) |
| 1458 | tputs (visible_bell, 1, _rl_output_character_function); |
| 1459 | else |
| 1460 | #endif /* !__GO32__ */ |
| 1461 | { |
| 1462 | fprintf (stderr, "\007"); |
| 1463 | fflush (stderr); |
| 1464 | } |
| 1465 | } |
| 1466 | return (-1); |
| 1467 | } |
| 1468 | |
| 1469 | /* How to abort things. */ |
| 1470 | rl_abort () |
| 1471 | { |
| 1472 | ding (); |
| 1473 | rl_clear_message (); |
| 1474 | rl_init_argument (); |
| 1475 | rl_pending_input = 0; |
| 1476 | |
| 1477 | defining_kbd_macro = 0; |
| 1478 | while (executing_macro) |
| 1479 | pop_executing_macro (); |
| 1480 | |
| 1481 | rl_last_func = (Function *)NULL; |
| 1482 | longjmp (readline_top_level, 1); |
| 1483 | } |
| 1484 | |
| 1485 | /* Return a copy of the string between FROM and TO. |
| 1486 | FROM is inclusive, TO is not. */ |
| 1487 | char * |
| 1488 | rl_copy_text (from, to) |
| 1489 | int from, to; |
| 1490 | { |
| 1491 | register int length; |
| 1492 | char *copy; |
| 1493 | |
| 1494 | /* Fix it if the caller is confused. */ |
| 1495 | if (from > to) |
| 1496 | { |
| 1497 | int t = from; |
| 1498 | from = to; |
| 1499 | to = t; |
| 1500 | } |
| 1501 | |
| 1502 | length = to - from; |
| 1503 | copy = (char *)xmalloc (1 + length); |
| 1504 | strncpy (copy, the_line + from, length); |
| 1505 | copy[length] = '\0'; |
| 1506 | return (copy); |
| 1507 | } |
| 1508 | |
| 1509 | /* Increase the size of RL_LINE_BUFFER until it has enough space to hold |
| 1510 | LEN characters. */ |
| 1511 | void |
| 1512 | rl_extend_line_buffer (len) |
| 1513 | int len; |
| 1514 | { |
| 1515 | while (len >= rl_line_buffer_len) |
| 1516 | rl_line_buffer = |
| 1517 | (char *)xrealloc |
| 1518 | (rl_line_buffer, rl_line_buffer_len += DEFAULT_BUFFER_SIZE); |
| 1519 | |
| 1520 | the_line = rl_line_buffer; |
| 1521 | } |
| 1522 | |
| 1523 | \f |
| 1524 | /* **************************************************************** */ |
| 1525 | /* */ |
| 1526 | /* Insert and Delete */ |
| 1527 | /* */ |
| 1528 | /* **************************************************************** */ |
| 1529 | |
| 1530 | /* Insert a string of text into the line at point. This is the only |
| 1531 | way that you should do insertion. rl_insert () calls this |
| 1532 | function. */ |
| 1533 | rl_insert_text (string) |
| 1534 | char *string; |
| 1535 | { |
| 1536 | register int i, l = strlen (string); |
| 1537 | |
| 1538 | if (rl_end + l >= rl_line_buffer_len) |
| 1539 | rl_extend_line_buffer (rl_end + l); |
| 1540 | |
| 1541 | for (i = rl_end; i >= rl_point; i--) |
| 1542 | the_line[i + l] = the_line[i]; |
| 1543 | strncpy (the_line + rl_point, string, l); |
| 1544 | |
| 1545 | /* Remember how to undo this if we aren't undoing something. */ |
| 1546 | if (!doing_an_undo) |
| 1547 | { |
| 1548 | /* If possible and desirable, concatenate the undos. */ |
| 1549 | if ((strlen (string) == 1) && |
| 1550 | rl_undo_list && |
| 1551 | (rl_undo_list->what == UNDO_INSERT) && |
| 1552 | (rl_undo_list->end == rl_point) && |
| 1553 | (rl_undo_list->end - rl_undo_list->start < 20)) |
| 1554 | rl_undo_list->end++; |
| 1555 | else |
| 1556 | rl_add_undo (UNDO_INSERT, rl_point, rl_point + l, (char *)NULL); |
| 1557 | } |
| 1558 | rl_point += l; |
| 1559 | rl_end += l; |
| 1560 | the_line[rl_end] = '\0'; |
| 1561 | } |
| 1562 | |
| 1563 | /* Delete the string between FROM and TO. FROM is |
| 1564 | inclusive, TO is not. */ |
| 1565 | rl_delete_text (from, to) |
| 1566 | int from, to; |
| 1567 | { |
| 1568 | register char *text; |
| 1569 | |
| 1570 | /* Fix it if the caller is confused. */ |
| 1571 | if (from > to) |
| 1572 | { |
| 1573 | int t = from; |
| 1574 | from = to; |
| 1575 | to = t; |
| 1576 | } |
| 1577 | text = rl_copy_text (from, to); |
| 1578 | strncpy (the_line + from, the_line + to, rl_end - to); |
| 1579 | |
| 1580 | /* Remember how to undo this delete. */ |
| 1581 | if (!doing_an_undo) |
| 1582 | rl_add_undo (UNDO_DELETE, from, to, text); |
| 1583 | else |
| 1584 | free (text); |
| 1585 | |
| 1586 | rl_end -= (to - from); |
| 1587 | the_line[rl_end] = '\0'; |
| 1588 | } |
| 1589 | |
| 1590 | \f |
| 1591 | /* **************************************************************** */ |
| 1592 | /* */ |
| 1593 | /* Readline character functions */ |
| 1594 | /* */ |
| 1595 | /* **************************************************************** */ |
| 1596 | |
| 1597 | /* This is not a gap editor, just a stupid line input routine. No hair |
| 1598 | is involved in writing any of the functions, and none should be. */ |
| 1599 | |
| 1600 | /* Note that: |
| 1601 | |
| 1602 | rl_end is the place in the string that we would place '\0'; |
| 1603 | i.e., it is always safe to place '\0' there. |
| 1604 | |
| 1605 | rl_point is the place in the string where the cursor is. Sometimes |
| 1606 | this is the same as rl_end. |
| 1607 | |
| 1608 | Any command that is called interactively receives two arguments. |
| 1609 | The first is a count: the numeric arg pased to this command. |
| 1610 | The second is the key which invoked this command. |
| 1611 | */ |
| 1612 | |
| 1613 | \f |
| 1614 | /* **************************************************************** */ |
| 1615 | /* */ |
| 1616 | /* Movement Commands */ |
| 1617 | /* */ |
| 1618 | /* **************************************************************** */ |
| 1619 | |
| 1620 | /* Note that if you `optimize' the display for these functions, you cannot |
| 1621 | use said functions in other functions which do not do optimizing display. |
| 1622 | I.e., you will have to update the data base for rl_redisplay, and you |
| 1623 | might as well let rl_redisplay do that job. */ |
| 1624 | |
| 1625 | /* Move forward COUNT characters. */ |
| 1626 | rl_forward (count) |
| 1627 | int count; |
| 1628 | { |
| 1629 | if (count < 0) |
| 1630 | rl_backward (-count); |
| 1631 | else |
| 1632 | while (count) |
| 1633 | { |
| 1634 | #if defined (VI_MODE) |
| 1635 | if (rl_point >= (rl_end - (rl_editing_mode == vi_mode))) |
| 1636 | #else |
| 1637 | if (rl_point == rl_end) |
| 1638 | #endif /* VI_MODE */ |
| 1639 | { |
| 1640 | ding (); |
| 1641 | return 0; |
| 1642 | } |
| 1643 | else |
| 1644 | rl_point++; |
| 1645 | --count; |
| 1646 | } |
| 1647 | return 0; |
| 1648 | } |
| 1649 | |
| 1650 | /* Move backward COUNT characters. */ |
| 1651 | rl_backward (count) |
| 1652 | int count; |
| 1653 | { |
| 1654 | if (count < 0) |
| 1655 | rl_forward (-count); |
| 1656 | else |
| 1657 | while (count) |
| 1658 | { |
| 1659 | if (!rl_point) |
| 1660 | { |
| 1661 | ding (); |
| 1662 | return 0; |
| 1663 | } |
| 1664 | else |
| 1665 | --rl_point; |
| 1666 | --count; |
| 1667 | } |
| 1668 | return 0; |
| 1669 | } |
| 1670 | |
| 1671 | /* Move to the beginning of the line. */ |
| 1672 | rl_beg_of_line () |
| 1673 | { |
| 1674 | rl_point = 0; |
| 1675 | return 0; |
| 1676 | } |
| 1677 | |
| 1678 | /* Move to the end of the line. */ |
| 1679 | rl_end_of_line () |
| 1680 | { |
| 1681 | rl_point = rl_end; |
| 1682 | return 0; |
| 1683 | } |
| 1684 | |
| 1685 | /* Move forward a word. We do what Emacs does. */ |
| 1686 | rl_forward_word (count) |
| 1687 | int count; |
| 1688 | { |
| 1689 | int c; |
| 1690 | |
| 1691 | if (count < 0) |
| 1692 | { |
| 1693 | rl_backward_word (-count); |
| 1694 | return 0; |
| 1695 | } |
| 1696 | |
| 1697 | while (count) |
| 1698 | { |
| 1699 | if (rl_point == rl_end) |
| 1700 | return 0; |
| 1701 | |
| 1702 | /* If we are not in a word, move forward until we are in one. |
| 1703 | Then, move forward until we hit a non-alphabetic character. */ |
| 1704 | c = the_line[rl_point]; |
| 1705 | if (!alphabetic (c)) |
| 1706 | { |
| 1707 | while (++rl_point < rl_end) |
| 1708 | { |
| 1709 | c = the_line[rl_point]; |
| 1710 | if (alphabetic (c)) break; |
| 1711 | } |
| 1712 | } |
| 1713 | if (rl_point == rl_end) return; |
| 1714 | while (++rl_point < rl_end) |
| 1715 | { |
| 1716 | c = the_line[rl_point]; |
| 1717 | if (!alphabetic (c)) break; |
| 1718 | } |
| 1719 | --count; |
| 1720 | } |
| 1721 | return 0; |
| 1722 | } |
| 1723 | |
| 1724 | /* Move backward a word. We do what Emacs does. */ |
| 1725 | rl_backward_word (count) |
| 1726 | int count; |
| 1727 | { |
| 1728 | int c; |
| 1729 | |
| 1730 | if (count < 0) |
| 1731 | { |
| 1732 | rl_forward_word (-count); |
| 1733 | return 0; |
| 1734 | } |
| 1735 | |
| 1736 | while (count) |
| 1737 | { |
| 1738 | if (!rl_point) |
| 1739 | return 0; |
| 1740 | |
| 1741 | /* Like rl_forward_word (), except that we look at the characters |
| 1742 | just before point. */ |
| 1743 | |
| 1744 | c = the_line[rl_point - 1]; |
| 1745 | if (!alphabetic (c)) |
| 1746 | { |
| 1747 | while (--rl_point) |
| 1748 | { |
| 1749 | c = the_line[rl_point - 1]; |
| 1750 | if (alphabetic (c)) break; |
| 1751 | } |
| 1752 | } |
| 1753 | |
| 1754 | while (rl_point) |
| 1755 | { |
| 1756 | c = the_line[rl_point - 1]; |
| 1757 | if (!alphabetic (c)) |
| 1758 | break; |
| 1759 | else --rl_point; |
| 1760 | } |
| 1761 | --count; |
| 1762 | } |
| 1763 | return 0; |
| 1764 | } |
| 1765 | |
| 1766 | /* Clear the current line. Numeric argument to C-l does this. */ |
| 1767 | rl_refresh_line () |
| 1768 | { |
| 1769 | int curr_line = _rl_last_c_pos / screenwidth; |
| 1770 | |
| 1771 | _rl_move_vert (curr_line); |
| 1772 | _rl_move_cursor_relative (0, the_line); /* XXX is this right */ |
| 1773 | |
| 1774 | #if defined (__GO32__) |
| 1775 | { |
| 1776 | int row, col, width, row_start; |
| 1777 | |
| 1778 | ScreenGetCursor (&row, &col); |
| 1779 | width = ScreenCols (); |
| 1780 | row_start = ScreenPrimary + (row * width); |
| 1781 | memset (row_start + col, 0, (width - col) * 2); |
| 1782 | } |
| 1783 | #else /* !__GO32__ */ |
| 1784 | if (term_clreol) |
| 1785 | tputs (term_clreol, 1, _rl_output_character_function); |
| 1786 | #endif /* !__GO32__ */ |
| 1787 | |
| 1788 | rl_forced_update_display (); |
| 1789 | rl_display_fixed = 1; |
| 1790 | |
| 1791 | return 0; |
| 1792 | } |
| 1793 | |
| 1794 | /* C-l typed to a line without quoting clears the screen, and then reprints |
| 1795 | the prompt and the current input line. Given a numeric arg, redraw only |
| 1796 | the current line. */ |
| 1797 | rl_clear_screen () |
| 1798 | { |
| 1799 | if (rl_explicit_arg) |
| 1800 | { |
| 1801 | rl_refresh_line (); |
| 1802 | return 0; |
| 1803 | } |
| 1804 | |
| 1805 | #if !defined (__GO32__) |
| 1806 | if (term_clrpag) |
| 1807 | tputs (term_clrpag, 1, _rl_output_character_function); |
| 1808 | else |
| 1809 | #endif /* !__GO32__ */ |
| 1810 | crlf (); |
| 1811 | |
| 1812 | rl_forced_update_display (); |
| 1813 | rl_display_fixed = 1; |
| 1814 | |
| 1815 | return 0; |
| 1816 | } |
| 1817 | |
| 1818 | rl_arrow_keys (count, c) |
| 1819 | int count, c; |
| 1820 | { |
| 1821 | int ch; |
| 1822 | |
| 1823 | ch = rl_read_key (); |
| 1824 | |
| 1825 | switch (to_upper (ch)) |
| 1826 | { |
| 1827 | case 'A': |
| 1828 | rl_get_previous_history (count); |
| 1829 | break; |
| 1830 | |
| 1831 | case 'B': |
| 1832 | rl_get_next_history (count); |
| 1833 | break; |
| 1834 | |
| 1835 | case 'C': |
| 1836 | rl_forward (count); |
| 1837 | break; |
| 1838 | |
| 1839 | case 'D': |
| 1840 | rl_backward (count); |
| 1841 | break; |
| 1842 | |
| 1843 | default: |
| 1844 | ding (); |
| 1845 | } |
| 1846 | return 0; |
| 1847 | } |
| 1848 | |
| 1849 | \f |
| 1850 | /* **************************************************************** */ |
| 1851 | /* */ |
| 1852 | /* Text commands */ |
| 1853 | /* */ |
| 1854 | /* **************************************************************** */ |
| 1855 | |
| 1856 | /* Insert the character C at the current location, moving point forward. */ |
| 1857 | rl_insert (count, c) |
| 1858 | int count, c; |
| 1859 | { |
| 1860 | register int i; |
| 1861 | char *string; |
| 1862 | |
| 1863 | if (count <= 0) |
| 1864 | return 0; |
| 1865 | |
| 1866 | /* If we can optimize, then do it. But don't let people crash |
| 1867 | readline because of extra large arguments. */ |
| 1868 | if (count > 1 && count < 1024) |
| 1869 | { |
| 1870 | string = (char *)alloca (1 + count); |
| 1871 | |
| 1872 | for (i = 0; i < count; i++) |
| 1873 | string[i] = c; |
| 1874 | |
| 1875 | string[i] = '\0'; |
| 1876 | rl_insert_text (string); |
| 1877 | return 0; |
| 1878 | } |
| 1879 | |
| 1880 | if (count > 1024) |
| 1881 | { |
| 1882 | int decreaser; |
| 1883 | |
| 1884 | string = (char *)alloca (1024 + 1); |
| 1885 | |
| 1886 | for (i = 0; i < 1024; i++) |
| 1887 | string[i] = c; |
| 1888 | |
| 1889 | while (count) |
| 1890 | { |
| 1891 | decreaser = (count > 1024 ? 1024 : count); |
| 1892 | string[decreaser] = '\0'; |
| 1893 | rl_insert_text (string); |
| 1894 | count -= decreaser; |
| 1895 | } |
| 1896 | return 0; |
| 1897 | } |
| 1898 | |
| 1899 | /* We are inserting a single character. |
| 1900 | If there is pending input, then make a string of all of the |
| 1901 | pending characters that are bound to rl_insert, and insert |
| 1902 | them all. */ |
| 1903 | if (any_typein) |
| 1904 | { |
| 1905 | int key = 0, t; |
| 1906 | |
| 1907 | i = 0; |
| 1908 | string = (char *)alloca (ibuffer_len + 1); |
| 1909 | string[i++] = c; |
| 1910 | |
| 1911 | while ((t = rl_get_char (&key)) && |
| 1912 | (_rl_keymap[key].type == ISFUNC && |
| 1913 | _rl_keymap[key].function == rl_insert)) |
| 1914 | string[i++] = key; |
| 1915 | |
| 1916 | if (t) |
| 1917 | rl_unget_char (key); |
| 1918 | |
| 1919 | string[i] = '\0'; |
| 1920 | rl_insert_text (string); |
| 1921 | } |
| 1922 | else |
| 1923 | { |
| 1924 | /* Inserting a single character. */ |
| 1925 | string = (char *)alloca (2); |
| 1926 | |
| 1927 | string[1] = '\0'; |
| 1928 | string[0] = c; |
| 1929 | rl_insert_text (string); |
| 1930 | } |
| 1931 | return 0; |
| 1932 | } |
| 1933 | |
| 1934 | /* Insert the next typed character verbatim. */ |
| 1935 | rl_quoted_insert (count) |
| 1936 | int count; |
| 1937 | { |
| 1938 | int c; |
| 1939 | |
| 1940 | c = rl_read_key (); |
| 1941 | return (rl_insert (count, c)); |
| 1942 | |
| 1943 | } |
| 1944 | |
| 1945 | /* Insert a tab character. */ |
| 1946 | rl_tab_insert (count) |
| 1947 | int count; |
| 1948 | { |
| 1949 | return (rl_insert (count, '\t')); |
| 1950 | } |
| 1951 | |
| 1952 | /* What to do when a NEWLINE is pressed. We accept the whole line. |
| 1953 | KEY is the key that invoked this command. I guess it could have |
| 1954 | meaning in the future. */ |
| 1955 | rl_newline (count, key) |
| 1956 | int count, key; |
| 1957 | { |
| 1958 | rl_done = 1; |
| 1959 | |
| 1960 | #if defined (VI_MODE) |
| 1961 | { |
| 1962 | extern int _rl_vi_doing_insert; |
| 1963 | if (_rl_vi_doing_insert) |
| 1964 | { |
| 1965 | rl_end_undo_group (); |
| 1966 | _rl_vi_doing_insert = 0; |
| 1967 | } |
| 1968 | } |
| 1969 | rl_vi_set_last (); |
| 1970 | |
| 1971 | #endif /* VI_MODE */ |
| 1972 | |
| 1973 | if (readline_echoing_p) |
| 1974 | { |
| 1975 | _rl_move_vert (_rl_vis_botlin); |
| 1976 | _rl_vis_botlin = 0; |
| 1977 | crlf (); |
| 1978 | fflush (out_stream); |
| 1979 | rl_display_fixed++; |
| 1980 | } |
| 1981 | return 0; |
| 1982 | } |
| 1983 | |
| 1984 | rl_clean_up_for_exit () |
| 1985 | { |
| 1986 | if (readline_echoing_p) |
| 1987 | { |
| 1988 | _rl_move_vert (_rl_vis_botlin); |
| 1989 | _rl_vis_botlin = 0; |
| 1990 | fflush (out_stream); |
| 1991 | rl_restart_output (); |
| 1992 | } |
| 1993 | return 0; |
| 1994 | } |
| 1995 | |
| 1996 | /* What to do for some uppercase characters, like meta characters, |
| 1997 | and some characters appearing in emacs_ctlx_keymap. This function |
| 1998 | is just a stub, you bind keys to it and the code in rl_dispatch () |
| 1999 | is special cased. */ |
| 2000 | rl_do_lowercase_version (ignore1, ignore2) |
| 2001 | int ignore1, ignore2; |
| 2002 | { |
| 2003 | return 0; |
| 2004 | } |
| 2005 | |
| 2006 | /* Rubout the character behind point. */ |
| 2007 | rl_rubout (count) |
| 2008 | int count; |
| 2009 | { |
| 2010 | if (count < 0) |
| 2011 | { |
| 2012 | rl_delete (-count); |
| 2013 | return 0; |
| 2014 | } |
| 2015 | |
| 2016 | if (!rl_point) |
| 2017 | { |
| 2018 | ding (); |
| 2019 | return -1; |
| 2020 | } |
| 2021 | |
| 2022 | if (count > 1 || rl_explicit_arg) |
| 2023 | { |
| 2024 | int orig_point = rl_point; |
| 2025 | rl_backward (count); |
| 2026 | rl_kill_text (orig_point, rl_point); |
| 2027 | } |
| 2028 | else |
| 2029 | { |
| 2030 | int c = the_line[--rl_point]; |
| 2031 | rl_delete_text (rl_point, rl_point + 1); |
| 2032 | |
| 2033 | if (rl_point == rl_end && isprint (c) && _rl_last_c_pos) |
| 2034 | { |
| 2035 | int l; |
| 2036 | l = rl_character_len (c, rl_point); |
| 2037 | _rl_erase_at_end_of_line (l); |
| 2038 | } |
| 2039 | } |
| 2040 | return 0; |
| 2041 | } |
| 2042 | |
| 2043 | /* Delete the character under the cursor. Given a numeric argument, |
| 2044 | kill that many characters instead. */ |
| 2045 | rl_delete (count, invoking_key) |
| 2046 | int count, invoking_key; |
| 2047 | { |
| 2048 | if (count < 0) |
| 2049 | { |
| 2050 | return (rl_rubout (-count)); |
| 2051 | } |
| 2052 | |
| 2053 | if (rl_point == rl_end) |
| 2054 | { |
| 2055 | ding (); |
| 2056 | return -1; |
| 2057 | } |
| 2058 | |
| 2059 | if (count > 1 || rl_explicit_arg) |
| 2060 | { |
| 2061 | int orig_point = rl_point; |
| 2062 | rl_forward (count); |
| 2063 | rl_kill_text (orig_point, rl_point); |
| 2064 | rl_point = orig_point; |
| 2065 | return 0; |
| 2066 | } |
| 2067 | else |
| 2068 | return (rl_delete_text (rl_point, rl_point + 1)); |
| 2069 | |
| 2070 | } |
| 2071 | |
| 2072 | /* Delete all spaces and tabs around point. */ |
| 2073 | rl_delete_horizontal_space (count, ignore) |
| 2074 | int count, ignore; |
| 2075 | { |
| 2076 | int start = rl_point; |
| 2077 | |
| 2078 | while (rl_point && whitespace (the_line[rl_point - 1])) |
| 2079 | rl_point--; |
| 2080 | |
| 2081 | start = rl_point; |
| 2082 | |
| 2083 | while (rl_point < rl_end && whitespace (the_line[rl_point])) |
| 2084 | rl_point++; |
| 2085 | |
| 2086 | if (start != rl_point) |
| 2087 | { |
| 2088 | rl_delete_text (start, rl_point); |
| 2089 | rl_point = start; |
| 2090 | } |
| 2091 | return 0; |
| 2092 | } |
| 2093 | |
| 2094 | \f |
| 2095 | /* **************************************************************** */ |
| 2096 | /* */ |
| 2097 | /* Kill commands */ |
| 2098 | /* */ |
| 2099 | /* **************************************************************** */ |
| 2100 | |
| 2101 | /* The next two functions mimic unix line editing behaviour, except they |
| 2102 | save the deleted text on the kill ring. This is safer than not saving |
| 2103 | it, and since we have a ring, nobody should get screwed. */ |
| 2104 | |
| 2105 | /* This does what C-w does in Unix. We can't prevent people from |
| 2106 | using behaviour that they expect. */ |
| 2107 | rl_unix_word_rubout () |
| 2108 | { |
| 2109 | if (!rl_point) |
| 2110 | ding (); |
| 2111 | else |
| 2112 | { |
| 2113 | int orig_point = rl_point; |
| 2114 | |
| 2115 | while (rl_point && whitespace (the_line[rl_point - 1])) |
| 2116 | rl_point--; |
| 2117 | |
| 2118 | while (rl_point && !whitespace (the_line[rl_point - 1])) |
| 2119 | rl_point--; |
| 2120 | |
| 2121 | rl_kill_text (rl_point, orig_point); |
| 2122 | } |
| 2123 | return 0; |
| 2124 | } |
| 2125 | |
| 2126 | /* Here is C-u doing what Unix does. You don't *have* to use these |
| 2127 | key-bindings. We have a choice of killing the entire line, or |
| 2128 | killing from where we are to the start of the line. We choose the |
| 2129 | latter, because if you are a Unix weenie, then you haven't backspaced |
| 2130 | into the line at all, and if you aren't, then you know what you are |
| 2131 | doing. */ |
| 2132 | rl_unix_line_discard () |
| 2133 | { |
| 2134 | if (!rl_point) |
| 2135 | ding (); |
| 2136 | else |
| 2137 | { |
| 2138 | rl_kill_text (rl_point, 0); |
| 2139 | rl_point = 0; |
| 2140 | } |
| 2141 | return 0; |
| 2142 | } |
| 2143 | |
| 2144 | \f |
| 2145 | /* **************************************************************** */ |
| 2146 | /* */ |
| 2147 | /* Commands For Typos */ |
| 2148 | /* */ |
| 2149 | /* **************************************************************** */ |
| 2150 | |
| 2151 | /* Random and interesting things in here. */ |
| 2152 | |
| 2153 | /* **************************************************************** */ |
| 2154 | /* */ |
| 2155 | /* Changing Case */ |
| 2156 | /* */ |
| 2157 | /* **************************************************************** */ |
| 2158 | |
| 2159 | /* The three kinds of things that we know how to do. */ |
| 2160 | #define UpCase 1 |
| 2161 | #define DownCase 2 |
| 2162 | #define CapCase 3 |
| 2163 | |
| 2164 | static int rl_change_case (); |
| 2165 | |
| 2166 | /* Uppercase the word at point. */ |
| 2167 | rl_upcase_word (count) |
| 2168 | int count; |
| 2169 | { |
| 2170 | return (rl_change_case (count, UpCase)); |
| 2171 | } |
| 2172 | |
| 2173 | /* Lowercase the word at point. */ |
| 2174 | rl_downcase_word (count) |
| 2175 | int count; |
| 2176 | { |
| 2177 | return (rl_change_case (count, DownCase)); |
| 2178 | } |
| 2179 | |
| 2180 | /* Upcase the first letter, downcase the rest. */ |
| 2181 | rl_capitalize_word (count) |
| 2182 | int count; |
| 2183 | { |
| 2184 | return (rl_change_case (count, CapCase)); |
| 2185 | } |
| 2186 | |
| 2187 | /* The meaty function. |
| 2188 | Change the case of COUNT words, performing OP on them. |
| 2189 | OP is one of UpCase, DownCase, or CapCase. |
| 2190 | If a negative argument is given, leave point where it started, |
| 2191 | otherwise, leave it where it moves to. */ |
| 2192 | static int |
| 2193 | rl_change_case (count, op) |
| 2194 | int count, op; |
| 2195 | { |
| 2196 | register int start = rl_point, end; |
| 2197 | int state = 0; |
| 2198 | |
| 2199 | rl_forward_word (count); |
| 2200 | end = rl_point; |
| 2201 | |
| 2202 | if (count < 0) |
| 2203 | { |
| 2204 | int temp = start; |
| 2205 | start = end; |
| 2206 | end = temp; |
| 2207 | } |
| 2208 | |
| 2209 | /* We are going to modify some text, so let's prepare to undo it. */ |
| 2210 | rl_modifying (start, end); |
| 2211 | |
| 2212 | for (; start < end; start++) |
| 2213 | { |
| 2214 | switch (op) |
| 2215 | { |
| 2216 | case UpCase: |
| 2217 | the_line[start] = to_upper (the_line[start]); |
| 2218 | break; |
| 2219 | |
| 2220 | case DownCase: |
| 2221 | the_line[start] = to_lower (the_line[start]); |
| 2222 | break; |
| 2223 | |
| 2224 | case CapCase: |
| 2225 | if (state == 0) |
| 2226 | { |
| 2227 | the_line[start] = to_upper (the_line[start]); |
| 2228 | state = 1; |
| 2229 | } |
| 2230 | else |
| 2231 | { |
| 2232 | the_line[start] = to_lower (the_line[start]); |
| 2233 | } |
| 2234 | if (!pure_alphabetic (the_line[start])) |
| 2235 | state = 0; |
| 2236 | break; |
| 2237 | |
| 2238 | default: |
| 2239 | abort (); |
| 2240 | return -1; |
| 2241 | } |
| 2242 | } |
| 2243 | rl_point = end; |
| 2244 | return 0; |
| 2245 | } |
| 2246 | |
| 2247 | /* **************************************************************** */ |
| 2248 | /* */ |
| 2249 | /* Transposition */ |
| 2250 | /* */ |
| 2251 | /* **************************************************************** */ |
| 2252 | |
| 2253 | /* Transpose the words at point. */ |
| 2254 | rl_transpose_words (count) |
| 2255 | int count; |
| 2256 | { |
| 2257 | char *word1, *word2; |
| 2258 | int w1_beg, w1_end, w2_beg, w2_end; |
| 2259 | int orig_point = rl_point; |
| 2260 | |
| 2261 | if (!count) |
| 2262 | return 0; |
| 2263 | |
| 2264 | /* Find the two words. */ |
| 2265 | rl_forward_word (count); |
| 2266 | w2_end = rl_point; |
| 2267 | rl_backward_word (1); |
| 2268 | w2_beg = rl_point; |
| 2269 | rl_backward_word (count); |
| 2270 | w1_beg = rl_point; |
| 2271 | rl_forward_word (1); |
| 2272 | w1_end = rl_point; |
| 2273 | |
| 2274 | /* Do some check to make sure that there really are two words. */ |
| 2275 | if ((w1_beg == w2_beg) || (w2_beg < w1_end)) |
| 2276 | { |
| 2277 | ding (); |
| 2278 | rl_point = orig_point; |
| 2279 | return -1; |
| 2280 | } |
| 2281 | |
| 2282 | /* Get the text of the words. */ |
| 2283 | word1 = rl_copy_text (w1_beg, w1_end); |
| 2284 | word2 = rl_copy_text (w2_beg, w2_end); |
| 2285 | |
| 2286 | /* We are about to do many insertions and deletions. Remember them |
| 2287 | as one operation. */ |
| 2288 | rl_begin_undo_group (); |
| 2289 | |
| 2290 | /* Do the stuff at word2 first, so that we don't have to worry |
| 2291 | about word1 moving. */ |
| 2292 | rl_point = w2_beg; |
| 2293 | rl_delete_text (w2_beg, w2_end); |
| 2294 | rl_insert_text (word1); |
| 2295 | |
| 2296 | rl_point = w1_beg; |
| 2297 | rl_delete_text (w1_beg, w1_end); |
| 2298 | rl_insert_text (word2); |
| 2299 | |
| 2300 | /* This is exactly correct since the text before this point has not |
| 2301 | changed in length. */ |
| 2302 | rl_point = w2_end; |
| 2303 | |
| 2304 | /* I think that does it. */ |
| 2305 | rl_end_undo_group (); |
| 2306 | free (word1); |
| 2307 | free (word2); |
| 2308 | |
| 2309 | return 0; |
| 2310 | } |
| 2311 | |
| 2312 | /* Transpose the characters at point. If point is at the end of the line, |
| 2313 | then transpose the characters before point. */ |
| 2314 | rl_transpose_chars (count) |
| 2315 | int count; |
| 2316 | { |
| 2317 | char dummy[2]; |
| 2318 | |
| 2319 | if (!count) |
| 2320 | return 0; |
| 2321 | |
| 2322 | if (!rl_point || rl_end < 2) |
| 2323 | { |
| 2324 | ding (); |
| 2325 | return -1; |
| 2326 | } |
| 2327 | |
| 2328 | rl_begin_undo_group (); |
| 2329 | |
| 2330 | if (rl_point == rl_end) |
| 2331 | { |
| 2332 | --rl_point; |
| 2333 | count = 1; |
| 2334 | } |
| 2335 | rl_point--; |
| 2336 | |
| 2337 | dummy[0] = the_line[rl_point]; |
| 2338 | dummy[1] = '\0'; |
| 2339 | |
| 2340 | rl_delete_text (rl_point, rl_point + 1); |
| 2341 | |
| 2342 | rl_point += count; |
| 2343 | if (rl_point > rl_end) |
| 2344 | rl_point = rl_end; |
| 2345 | else if (rl_point < 0) |
| 2346 | rl_point = 0; |
| 2347 | rl_insert_text (dummy); |
| 2348 | |
| 2349 | rl_end_undo_group (); |
| 2350 | return 0; |
| 2351 | } |
| 2352 | \f |
| 2353 | /* **************************************************************** */ |
| 2354 | /* */ |
| 2355 | /* Undo, and Undoing */ |
| 2356 | /* */ |
| 2357 | /* **************************************************************** */ |
| 2358 | |
| 2359 | /* The current undo list for THE_LINE. */ |
| 2360 | UNDO_LIST *rl_undo_list = (UNDO_LIST *)NULL; |
| 2361 | |
| 2362 | /* Remember how to undo something. Concatenate some undos if that |
| 2363 | seems right. */ |
| 2364 | void |
| 2365 | rl_add_undo (what, start, end, text) |
| 2366 | enum undo_code what; |
| 2367 | int start, end; |
| 2368 | char *text; |
| 2369 | { |
| 2370 | UNDO_LIST *temp = (UNDO_LIST *)xmalloc (sizeof (UNDO_LIST)); |
| 2371 | temp->what = what; |
| 2372 | temp->start = start; |
| 2373 | temp->end = end; |
| 2374 | temp->text = text; |
| 2375 | temp->next = rl_undo_list; |
| 2376 | rl_undo_list = temp; |
| 2377 | } |
| 2378 | |
| 2379 | /* Free the existing undo list. */ |
| 2380 | void |
| 2381 | free_undo_list () |
| 2382 | { |
| 2383 | while (rl_undo_list) |
| 2384 | { |
| 2385 | UNDO_LIST *release = rl_undo_list; |
| 2386 | rl_undo_list = rl_undo_list->next; |
| 2387 | |
| 2388 | if (release->what == UNDO_DELETE) |
| 2389 | free (release->text); |
| 2390 | |
| 2391 | free (release); |
| 2392 | } |
| 2393 | rl_undo_list = (UNDO_LIST *)NULL; |
| 2394 | } |
| 2395 | |
| 2396 | /* Undo the next thing in the list. Return 0 if there |
| 2397 | is nothing to undo, or non-zero if there was. */ |
| 2398 | int |
| 2399 | rl_do_undo () |
| 2400 | { |
| 2401 | UNDO_LIST *release; |
| 2402 | int waiting_for_begin = 0; |
| 2403 | |
| 2404 | undo_thing: |
| 2405 | if (!rl_undo_list) |
| 2406 | return (0); |
| 2407 | |
| 2408 | doing_an_undo = 1; |
| 2409 | |
| 2410 | switch (rl_undo_list->what) { |
| 2411 | |
| 2412 | /* Undoing deletes means inserting some text. */ |
| 2413 | case UNDO_DELETE: |
| 2414 | rl_point = rl_undo_list->start; |
| 2415 | rl_insert_text (rl_undo_list->text); |
| 2416 | free (rl_undo_list->text); |
| 2417 | break; |
| 2418 | |
| 2419 | /* Undoing inserts means deleting some text. */ |
| 2420 | case UNDO_INSERT: |
| 2421 | rl_delete_text (rl_undo_list->start, rl_undo_list->end); |
| 2422 | rl_point = rl_undo_list->start; |
| 2423 | break; |
| 2424 | |
| 2425 | /* Undoing an END means undoing everything 'til we get to |
| 2426 | a BEGIN. */ |
| 2427 | case UNDO_END: |
| 2428 | waiting_for_begin++; |
| 2429 | break; |
| 2430 | |
| 2431 | /* Undoing a BEGIN means that we are done with this group. */ |
| 2432 | case UNDO_BEGIN: |
| 2433 | if (waiting_for_begin) |
| 2434 | waiting_for_begin--; |
| 2435 | else |
| 2436 | #if 0 |
| 2437 | abort (); |
| 2438 | #else |
| 2439 | ding (); |
| 2440 | #endif |
| 2441 | break; |
| 2442 | } |
| 2443 | |
| 2444 | doing_an_undo = 0; |
| 2445 | |
| 2446 | release = rl_undo_list; |
| 2447 | rl_undo_list = rl_undo_list->next; |
| 2448 | free (release); |
| 2449 | |
| 2450 | if (waiting_for_begin) |
| 2451 | goto undo_thing; |
| 2452 | |
| 2453 | return (1); |
| 2454 | } |
| 2455 | |
| 2456 | /* Begin a group. Subsequent undos are undone as an atomic operation. */ |
| 2457 | rl_begin_undo_group () |
| 2458 | { |
| 2459 | rl_add_undo (UNDO_BEGIN, 0, 0, 0); |
| 2460 | return 0; |
| 2461 | } |
| 2462 | |
| 2463 | /* End an undo group started with rl_begin_undo_group (). */ |
| 2464 | rl_end_undo_group () |
| 2465 | { |
| 2466 | rl_add_undo (UNDO_END, 0, 0, 0); |
| 2467 | return 0; |
| 2468 | } |
| 2469 | |
| 2470 | /* Save an undo entry for the text from START to END. */ |
| 2471 | rl_modifying (start, end) |
| 2472 | int start, end; |
| 2473 | { |
| 2474 | if (start > end) |
| 2475 | { |
| 2476 | int t = start; |
| 2477 | start = end; |
| 2478 | end = t; |
| 2479 | } |
| 2480 | |
| 2481 | if (start != end) |
| 2482 | { |
| 2483 | char *temp = rl_copy_text (start, end); |
| 2484 | rl_begin_undo_group (); |
| 2485 | rl_add_undo (UNDO_DELETE, start, end, temp); |
| 2486 | rl_add_undo (UNDO_INSERT, start, end, (char *)NULL); |
| 2487 | rl_end_undo_group (); |
| 2488 | } |
| 2489 | return 0; |
| 2490 | } |
| 2491 | |
| 2492 | /* Revert the current line to its previous state. */ |
| 2493 | rl_revert_line () |
| 2494 | { |
| 2495 | if (!rl_undo_list) |
| 2496 | ding (); |
| 2497 | else |
| 2498 | { |
| 2499 | while (rl_undo_list) |
| 2500 | rl_do_undo (); |
| 2501 | } |
| 2502 | return 0; |
| 2503 | } |
| 2504 | |
| 2505 | /* Do some undoing of things that were done. */ |
| 2506 | rl_undo_command (count) |
| 2507 | int count; |
| 2508 | { |
| 2509 | if (count < 0) |
| 2510 | return 0; /* Nothing to do. */ |
| 2511 | |
| 2512 | while (count) |
| 2513 | { |
| 2514 | if (rl_do_undo ()) |
| 2515 | count--; |
| 2516 | else |
| 2517 | { |
| 2518 | ding (); |
| 2519 | break; |
| 2520 | } |
| 2521 | } |
| 2522 | return 0; |
| 2523 | } |
| 2524 | \f |
| 2525 | /* **************************************************************** */ |
| 2526 | /* */ |
| 2527 | /* History Utilities */ |
| 2528 | /* */ |
| 2529 | /* **************************************************************** */ |
| 2530 | |
| 2531 | /* We already have a history library, and that is what we use to control |
| 2532 | the history features of readline. However, this is our local interface |
| 2533 | to the history mechanism. */ |
| 2534 | |
| 2535 | /* While we are editing the history, this is the saved |
| 2536 | version of the original line. */ |
| 2537 | HIST_ENTRY *saved_line_for_history = (HIST_ENTRY *)NULL; |
| 2538 | |
| 2539 | /* Set the history pointer back to the last entry in the history. */ |
| 2540 | start_using_history () |
| 2541 | { |
| 2542 | using_history (); |
| 2543 | if (saved_line_for_history) |
| 2544 | free_history_entry (saved_line_for_history); |
| 2545 | |
| 2546 | saved_line_for_history = (HIST_ENTRY *)NULL; |
| 2547 | return 0; |
| 2548 | } |
| 2549 | |
| 2550 | /* Free the contents (and containing structure) of a HIST_ENTRY. */ |
| 2551 | void |
| 2552 | free_history_entry (entry) |
| 2553 | HIST_ENTRY *entry; |
| 2554 | { |
| 2555 | if (!entry) |
| 2556 | return; |
| 2557 | if (entry->line) |
| 2558 | free (entry->line); |
| 2559 | free (entry); |
| 2560 | } |
| 2561 | |
| 2562 | /* Perhaps put back the current line if it has changed. */ |
| 2563 | maybe_replace_line () |
| 2564 | { |
| 2565 | HIST_ENTRY *temp = current_history (); |
| 2566 | |
| 2567 | /* If the current line has changed, save the changes. */ |
| 2568 | if (temp && ((UNDO_LIST *)(temp->data) != rl_undo_list)) |
| 2569 | { |
| 2570 | temp = replace_history_entry (where_history (), the_line, rl_undo_list); |
| 2571 | free (temp->line); |
| 2572 | free (temp); |
| 2573 | } |
| 2574 | return 0; |
| 2575 | } |
| 2576 | |
| 2577 | /* Put back the saved_line_for_history if there is one. */ |
| 2578 | maybe_unsave_line () |
| 2579 | { |
| 2580 | if (saved_line_for_history) |
| 2581 | { |
| 2582 | int line_len; |
| 2583 | |
| 2584 | line_len = strlen (saved_line_for_history->line); |
| 2585 | |
| 2586 | if (line_len >= rl_line_buffer_len) |
| 2587 | rl_extend_line_buffer (line_len); |
| 2588 | |
| 2589 | strcpy (the_line, saved_line_for_history->line); |
| 2590 | rl_undo_list = (UNDO_LIST *)saved_line_for_history->data; |
| 2591 | free_history_entry (saved_line_for_history); |
| 2592 | saved_line_for_history = (HIST_ENTRY *)NULL; |
| 2593 | rl_end = rl_point = strlen (the_line); |
| 2594 | } |
| 2595 | else |
| 2596 | ding (); |
| 2597 | return 0; |
| 2598 | } |
| 2599 | |
| 2600 | /* Save the current line in saved_line_for_history. */ |
| 2601 | maybe_save_line () |
| 2602 | { |
| 2603 | if (!saved_line_for_history) |
| 2604 | { |
| 2605 | saved_line_for_history = (HIST_ENTRY *)xmalloc (sizeof (HIST_ENTRY)); |
| 2606 | saved_line_for_history->line = savestring (the_line); |
| 2607 | saved_line_for_history->data = (char *)rl_undo_list; |
| 2608 | } |
| 2609 | return 0; |
| 2610 | } |
| 2611 | \f |
| 2612 | /* **************************************************************** */ |
| 2613 | /* */ |
| 2614 | /* History Commands */ |
| 2615 | /* */ |
| 2616 | /* **************************************************************** */ |
| 2617 | |
| 2618 | /* Meta-< goes to the start of the history. */ |
| 2619 | rl_beginning_of_history () |
| 2620 | { |
| 2621 | return (rl_get_previous_history (1 + where_history ())); |
| 2622 | } |
| 2623 | |
| 2624 | /* Meta-> goes to the end of the history. (The current line). */ |
| 2625 | rl_end_of_history () |
| 2626 | { |
| 2627 | maybe_replace_line (); |
| 2628 | using_history (); |
| 2629 | maybe_unsave_line (); |
| 2630 | return 0; |
| 2631 | } |
| 2632 | |
| 2633 | /* Move down to the next history line. */ |
| 2634 | rl_get_next_history (count) |
| 2635 | int count; |
| 2636 | { |
| 2637 | HIST_ENTRY *temp = (HIST_ENTRY *)NULL; |
| 2638 | |
| 2639 | if (count < 0) |
| 2640 | return (rl_get_previous_history (-count)); |
| 2641 | |
| 2642 | if (!count) |
| 2643 | return 0; |
| 2644 | |
| 2645 | maybe_replace_line (); |
| 2646 | |
| 2647 | while (count) |
| 2648 | { |
| 2649 | temp = next_history (); |
| 2650 | if (!temp) |
| 2651 | break; |
| 2652 | --count; |
| 2653 | } |
| 2654 | |
| 2655 | if (!temp) |
| 2656 | maybe_unsave_line (); |
| 2657 | else |
| 2658 | { |
| 2659 | int line_len; |
| 2660 | |
| 2661 | line_len = strlen (temp->line); |
| 2662 | |
| 2663 | if (line_len >= rl_line_buffer_len) |
| 2664 | rl_extend_line_buffer (line_len); |
| 2665 | |
| 2666 | strcpy (the_line, temp->line); |
| 2667 | rl_undo_list = (UNDO_LIST *)temp->data; |
| 2668 | rl_end = rl_point = strlen (the_line); |
| 2669 | #if defined (VI_MODE) |
| 2670 | if (rl_editing_mode == vi_mode) |
| 2671 | rl_point = 0; |
| 2672 | #endif /* VI_MODE */ |
| 2673 | } |
| 2674 | return 0; |
| 2675 | } |
| 2676 | |
| 2677 | /* Get the previous item out of our interactive history, making it the current |
| 2678 | line. If there is no previous history, just ding. */ |
| 2679 | rl_get_previous_history (count) |
| 2680 | int count; |
| 2681 | { |
| 2682 | HIST_ENTRY *old_temp = (HIST_ENTRY *)NULL; |
| 2683 | HIST_ENTRY *temp = (HIST_ENTRY *)NULL; |
| 2684 | |
| 2685 | if (count < 0) |
| 2686 | return (rl_get_next_history (-count)); |
| 2687 | |
| 2688 | if (!count) |
| 2689 | return 0; |
| 2690 | |
| 2691 | /* If we don't have a line saved, then save this one. */ |
| 2692 | maybe_save_line (); |
| 2693 | |
| 2694 | /* If the current line has changed, save the changes. */ |
| 2695 | maybe_replace_line (); |
| 2696 | |
| 2697 | while (count) |
| 2698 | { |
| 2699 | temp = previous_history (); |
| 2700 | if (!temp) |
| 2701 | break; |
| 2702 | else |
| 2703 | old_temp = temp; |
| 2704 | --count; |
| 2705 | } |
| 2706 | |
| 2707 | /* If there was a large argument, and we moved back to the start of the |
| 2708 | history, that is not an error. So use the last value found. */ |
| 2709 | if (!temp && old_temp) |
| 2710 | temp = old_temp; |
| 2711 | |
| 2712 | if (!temp) |
| 2713 | ding (); |
| 2714 | else |
| 2715 | { |
| 2716 | int line_len; |
| 2717 | |
| 2718 | line_len = strlen (temp->line); |
| 2719 | |
| 2720 | if (line_len >= rl_line_buffer_len) |
| 2721 | rl_extend_line_buffer (line_len); |
| 2722 | |
| 2723 | strcpy (the_line, temp->line); |
| 2724 | rl_undo_list = (UNDO_LIST *)temp->data; |
| 2725 | rl_end = rl_point = line_len; |
| 2726 | |
| 2727 | #if defined (VI_MODE) |
| 2728 | if (rl_editing_mode == vi_mode) |
| 2729 | rl_point = 0; |
| 2730 | #endif /* VI_MODE */ |
| 2731 | } |
| 2732 | return 0; |
| 2733 | } |
| 2734 | |
| 2735 | /* Make C be the next command to be executed. */ |
| 2736 | rl_execute_next (c) |
| 2737 | int c; |
| 2738 | { |
| 2739 | rl_pending_input = c; |
| 2740 | return 0; |
| 2741 | } |
| 2742 | |
| 2743 | /* **************************************************************** */ |
| 2744 | /* */ |
| 2745 | /* The Mark and the Region. */ |
| 2746 | /* */ |
| 2747 | /* **************************************************************** */ |
| 2748 | |
| 2749 | /* Set the mark at POSITION. */ |
| 2750 | rl_set_mark (position) |
| 2751 | int position; |
| 2752 | { |
| 2753 | if (position > rl_end) |
| 2754 | return -1; |
| 2755 | |
| 2756 | rl_mark = position; |
| 2757 | return 0; |
| 2758 | } |
| 2759 | |
| 2760 | /* Exchange the position of mark and point. */ |
| 2761 | rl_exchange_mark_and_point () |
| 2762 | { |
| 2763 | if (rl_mark > rl_end) |
| 2764 | rl_mark = -1; |
| 2765 | |
| 2766 | if (rl_mark == -1) |
| 2767 | { |
| 2768 | ding (); |
| 2769 | return -1; |
| 2770 | } |
| 2771 | else |
| 2772 | { |
| 2773 | int temp = rl_point; |
| 2774 | |
| 2775 | rl_point = rl_mark; |
| 2776 | rl_mark = temp; |
| 2777 | } |
| 2778 | return 0; |
| 2779 | } |
| 2780 | |
| 2781 | \f |
| 2782 | /* **************************************************************** */ |
| 2783 | /* */ |
| 2784 | /* Killing Mechanism */ |
| 2785 | /* */ |
| 2786 | /* **************************************************************** */ |
| 2787 | |
| 2788 | /* What we assume for a max number of kills. */ |
| 2789 | #define DEFAULT_MAX_KILLS 10 |
| 2790 | |
| 2791 | /* The real variable to look at to find out when to flush kills. */ |
| 2792 | int rl_max_kills = DEFAULT_MAX_KILLS; |
| 2793 | |
| 2794 | /* Where to store killed text. */ |
| 2795 | char **rl_kill_ring = (char **)NULL; |
| 2796 | |
| 2797 | /* Where we are in the kill ring. */ |
| 2798 | int rl_kill_index = 0; |
| 2799 | |
| 2800 | /* How many slots we have in the kill ring. */ |
| 2801 | int rl_kill_ring_length = 0; |
| 2802 | |
| 2803 | /* How to say that you only want to save a certain amount |
| 2804 | of kill material. */ |
| 2805 | rl_set_retained_kills (num) |
| 2806 | int num; |
| 2807 | { |
| 2808 | return 0; |
| 2809 | } |
| 2810 | |
| 2811 | /* The way to kill something. This appends or prepends to the last |
| 2812 | kill, if the last command was a kill command. if FROM is less |
| 2813 | than TO, then the text is appended, otherwise prepended. If the |
| 2814 | last command was not a kill command, then a new slot is made for |
| 2815 | this kill. */ |
| 2816 | rl_kill_text (from, to) |
| 2817 | int from, to; |
| 2818 | { |
| 2819 | int slot; |
| 2820 | char *text = rl_copy_text (from, to); |
| 2821 | |
| 2822 | /* Is there anything to kill? */ |
| 2823 | if (from == to) |
| 2824 | { |
| 2825 | free (text); |
| 2826 | last_command_was_kill++; |
| 2827 | return 0; |
| 2828 | } |
| 2829 | |
| 2830 | /* Delete the copied text from the line. */ |
| 2831 | rl_delete_text (from, to); |
| 2832 | |
| 2833 | /* First, find the slot to work with. */ |
| 2834 | if (!last_command_was_kill) |
| 2835 | { |
| 2836 | /* Get a new slot. */ |
| 2837 | if (!rl_kill_ring) |
| 2838 | { |
| 2839 | /* If we don't have any defined, then make one. */ |
| 2840 | rl_kill_ring = (char **) |
| 2841 | xmalloc (((rl_kill_ring_length = 1) + 1) * sizeof (char *)); |
| 2842 | slot = 1; |
| 2843 | } |
| 2844 | else |
| 2845 | { |
| 2846 | /* We have to add a new slot on the end, unless we have |
| 2847 | exceeded the max limit for remembering kills. */ |
| 2848 | slot = rl_kill_ring_length; |
| 2849 | if (slot == rl_max_kills) |
| 2850 | { |
| 2851 | register int i; |
| 2852 | free (rl_kill_ring[0]); |
| 2853 | for (i = 0; i < slot; i++) |
| 2854 | rl_kill_ring[i] = rl_kill_ring[i + 1]; |
| 2855 | } |
| 2856 | else |
| 2857 | { |
| 2858 | rl_kill_ring = |
| 2859 | (char **) |
| 2860 | xrealloc (rl_kill_ring, |
| 2861 | ((slot = (rl_kill_ring_length += 1)) + 1) |
| 2862 | * sizeof (char *)); |
| 2863 | } |
| 2864 | } |
| 2865 | slot--; |
| 2866 | } |
| 2867 | else |
| 2868 | { |
| 2869 | slot = rl_kill_ring_length - 1; |
| 2870 | } |
| 2871 | |
| 2872 | /* If the last command was a kill, prepend or append. */ |
| 2873 | if (last_command_was_kill && rl_editing_mode != vi_mode) |
| 2874 | { |
| 2875 | char *old = rl_kill_ring[slot]; |
| 2876 | char *new = (char *)xmalloc (1 + strlen (old) + strlen (text)); |
| 2877 | |
| 2878 | if (from < to) |
| 2879 | { |
| 2880 | strcpy (new, old); |
| 2881 | strcat (new, text); |
| 2882 | } |
| 2883 | else |
| 2884 | { |
| 2885 | strcpy (new, text); |
| 2886 | strcat (new, old); |
| 2887 | } |
| 2888 | free (old); |
| 2889 | free (text); |
| 2890 | rl_kill_ring[slot] = new; |
| 2891 | } |
| 2892 | else |
| 2893 | { |
| 2894 | rl_kill_ring[slot] = text; |
| 2895 | } |
| 2896 | rl_kill_index = slot; |
| 2897 | last_command_was_kill++; |
| 2898 | return 0; |
| 2899 | } |
| 2900 | |
| 2901 | /* Now REMEMBER! In order to do prepending or appending correctly, kill |
| 2902 | commands always make rl_point's original position be the FROM argument, |
| 2903 | and rl_point's extent be the TO argument. */ |
| 2904 | |
| 2905 | /* **************************************************************** */ |
| 2906 | /* */ |
| 2907 | /* Killing Commands */ |
| 2908 | /* */ |
| 2909 | /* **************************************************************** */ |
| 2910 | |
| 2911 | /* Delete the word at point, saving the text in the kill ring. */ |
| 2912 | rl_kill_word (count) |
| 2913 | int count; |
| 2914 | { |
| 2915 | int orig_point = rl_point; |
| 2916 | |
| 2917 | if (count < 0) |
| 2918 | return (rl_backward_kill_word (-count)); |
| 2919 | else |
| 2920 | { |
| 2921 | rl_forward_word (count); |
| 2922 | |
| 2923 | if (rl_point != orig_point) |
| 2924 | rl_kill_text (orig_point, rl_point); |
| 2925 | |
| 2926 | rl_point = orig_point; |
| 2927 | } |
| 2928 | return 0; |
| 2929 | } |
| 2930 | |
| 2931 | /* Rubout the word before point, placing it on the kill ring. */ |
| 2932 | rl_backward_kill_word (count) |
| 2933 | int count; |
| 2934 | { |
| 2935 | int orig_point = rl_point; |
| 2936 | |
| 2937 | if (count < 0) |
| 2938 | return (rl_kill_word (-count)); |
| 2939 | else |
| 2940 | { |
| 2941 | rl_backward_word (count); |
| 2942 | |
| 2943 | if (rl_point != orig_point) |
| 2944 | rl_kill_text (orig_point, rl_point); |
| 2945 | } |
| 2946 | } |
| 2947 | |
| 2948 | /* Kill from here to the end of the line. If DIRECTION is negative, kill |
| 2949 | back to the line start instead. */ |
| 2950 | rl_kill_line (direction) |
| 2951 | int direction; |
| 2952 | { |
| 2953 | int orig_point = rl_point; |
| 2954 | |
| 2955 | if (direction < 0) |
| 2956 | return (rl_backward_kill_line (1)); |
| 2957 | else |
| 2958 | { |
| 2959 | rl_end_of_line (); |
| 2960 | if (orig_point != rl_point) |
| 2961 | rl_kill_text (orig_point, rl_point); |
| 2962 | rl_point = orig_point; |
| 2963 | } |
| 2964 | return 0; |
| 2965 | } |
| 2966 | |
| 2967 | /* Kill backwards to the start of the line. If DIRECTION is negative, kill |
| 2968 | forwards to the line end instead. */ |
| 2969 | rl_backward_kill_line (direction) |
| 2970 | int direction; |
| 2971 | { |
| 2972 | int orig_point = rl_point; |
| 2973 | |
| 2974 | if (direction < 0) |
| 2975 | return (rl_kill_line (1)); |
| 2976 | else |
| 2977 | { |
| 2978 | if (!rl_point) |
| 2979 | ding (); |
| 2980 | else |
| 2981 | { |
| 2982 | rl_beg_of_line (); |
| 2983 | rl_kill_text (orig_point, rl_point); |
| 2984 | } |
| 2985 | } |
| 2986 | return 0; |
| 2987 | } |
| 2988 | |
| 2989 | /* Yank back the last killed text. This ignores arguments. */ |
| 2990 | rl_yank () |
| 2991 | { |
| 2992 | if (!rl_kill_ring) |
| 2993 | { |
| 2994 | rl_abort (); |
| 2995 | return -1; |
| 2996 | } |
| 2997 | |
| 2998 | rl_set_mark (rl_point); |
| 2999 | rl_insert_text (rl_kill_ring[rl_kill_index]); |
| 3000 | return 0; |
| 3001 | } |
| 3002 | |
| 3003 | /* If the last command was yank, or yank_pop, and the text just |
| 3004 | before point is identical to the current kill item, then |
| 3005 | delete that text from the line, rotate the index down, and |
| 3006 | yank back some other text. */ |
| 3007 | rl_yank_pop () |
| 3008 | { |
| 3009 | int l; |
| 3010 | |
| 3011 | if (((rl_last_func != rl_yank_pop) && (rl_last_func != rl_yank)) || |
| 3012 | !rl_kill_ring) |
| 3013 | { |
| 3014 | rl_abort (); |
| 3015 | return -1; |
| 3016 | } |
| 3017 | |
| 3018 | l = strlen (rl_kill_ring[rl_kill_index]); |
| 3019 | if (((rl_point - l) >= 0) && |
| 3020 | (strncmp (the_line + (rl_point - l), |
| 3021 | rl_kill_ring[rl_kill_index], l) == 0)) |
| 3022 | { |
| 3023 | rl_delete_text ((rl_point - l), rl_point); |
| 3024 | rl_point -= l; |
| 3025 | rl_kill_index--; |
| 3026 | if (rl_kill_index < 0) |
| 3027 | rl_kill_index = rl_kill_ring_length - 1; |
| 3028 | rl_yank (); |
| 3029 | return 0; |
| 3030 | } |
| 3031 | else |
| 3032 | { |
| 3033 | rl_abort (); |
| 3034 | return -1; |
| 3035 | } |
| 3036 | } |
| 3037 | |
| 3038 | /* Yank the COUNTth argument from the previous history line. */ |
| 3039 | rl_yank_nth_arg (count, ignore) |
| 3040 | int count; |
| 3041 | { |
| 3042 | register HIST_ENTRY *entry = previous_history (); |
| 3043 | char *arg; |
| 3044 | |
| 3045 | if (entry) |
| 3046 | next_history (); |
| 3047 | else |
| 3048 | { |
| 3049 | ding (); |
| 3050 | return -1; |
| 3051 | } |
| 3052 | |
| 3053 | arg = history_arg_extract (count, count, entry->line); |
| 3054 | if (!arg || !*arg) |
| 3055 | { |
| 3056 | ding (); |
| 3057 | return -1; |
| 3058 | } |
| 3059 | |
| 3060 | rl_begin_undo_group (); |
| 3061 | |
| 3062 | #if defined (VI_MODE) |
| 3063 | /* Vi mode always inserts a space before yanking the argument, and it |
| 3064 | inserts it right *after* rl_point. */ |
| 3065 | if (rl_editing_mode == vi_mode) |
| 3066 | rl_point++; |
| 3067 | #endif /* VI_MODE */ |
| 3068 | |
| 3069 | #if 0 |
| 3070 | if (rl_point && the_line[rl_point - 1] != ' ') |
| 3071 | rl_insert_text (" "); |
| 3072 | #endif |
| 3073 | |
| 3074 | rl_insert_text (arg); |
| 3075 | free (arg); |
| 3076 | |
| 3077 | rl_end_undo_group (); |
| 3078 | return 0; |
| 3079 | } |
| 3080 | |
| 3081 | /* How to toggle back and forth between editing modes. */ |
| 3082 | rl_vi_editing_mode () |
| 3083 | { |
| 3084 | #if defined (VI_MODE) |
| 3085 | rl_editing_mode = vi_mode; |
| 3086 | rl_vi_insertion_mode (); |
| 3087 | return 0; |
| 3088 | #endif /* VI_MODE */ |
| 3089 | } |
| 3090 | |
| 3091 | rl_emacs_editing_mode () |
| 3092 | { |
| 3093 | rl_editing_mode = emacs_mode; |
| 3094 | _rl_keymap = emacs_standard_keymap; |
| 3095 | return 0; |
| 3096 | } |
| 3097 | |
| 3098 | \f |
| 3099 | /* **************************************************************** */ |
| 3100 | /* */ |
| 3101 | /* USG (System V) Support */ |
| 3102 | /* */ |
| 3103 | /* **************************************************************** */ |
| 3104 | |
| 3105 | int |
| 3106 | rl_getc (stream) |
| 3107 | FILE *stream; |
| 3108 | { |
| 3109 | int result; |
| 3110 | unsigned char c; |
| 3111 | |
| 3112 | #if defined (__GO32__) |
| 3113 | if (isatty (0)) |
| 3114 | return (getkey ()); |
| 3115 | #endif /* __GO32__ */ |
| 3116 | |
| 3117 | while (1) |
| 3118 | { |
| 3119 | result = read (fileno (stream), &c, sizeof (unsigned char)); |
| 3120 | |
| 3121 | if (result == sizeof (unsigned char)) |
| 3122 | return (c); |
| 3123 | |
| 3124 | /* If zero characters are returned, then the file that we are |
| 3125 | reading from is empty! Return EOF in that case. */ |
| 3126 | if (result == 0) |
| 3127 | return (EOF); |
| 3128 | |
| 3129 | #if defined (EWOULDBLOCK) |
| 3130 | if (errno == EWOULDBLOCK) |
| 3131 | { |
| 3132 | int flags; |
| 3133 | |
| 3134 | if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0) |
| 3135 | return (EOF); |
| 3136 | if (flags & O_NDELAY) |
| 3137 | { |
| 3138 | flags &= ~O_NDELAY; |
| 3139 | fcntl (fileno (stream), F_SETFL, flags); |
| 3140 | continue; |
| 3141 | } |
| 3142 | continue; |
| 3143 | } |
| 3144 | #endif /* EWOULDBLOCK */ |
| 3145 | |
| 3146 | #if defined (_POSIX_VERSION) && defined (EAGAIN) && defined (O_NONBLOCK) |
| 3147 | if (errno == EAGAIN) |
| 3148 | { |
| 3149 | int flags; |
| 3150 | |
| 3151 | if ((flags = fcntl (fileno (stream), F_GETFL, 0)) < 0) |
| 3152 | return (EOF); |
| 3153 | if (flags & O_NONBLOCK) |
| 3154 | { |
| 3155 | flags &= ~O_NONBLOCK; |
| 3156 | fcntl (fileno (stream), F_SETFL, flags); |
| 3157 | continue; |
| 3158 | } |
| 3159 | } |
| 3160 | #endif /* _POSIX_VERSION && EAGAIN && O_NONBLOCK */ |
| 3161 | |
| 3162 | #if !defined (__GO32__) |
| 3163 | /* If the error that we received was SIGINT, then try again, |
| 3164 | this is simply an interrupted system call to read (). |
| 3165 | Otherwise, some error ocurred, also signifying EOF. */ |
| 3166 | if (errno != EINTR) |
| 3167 | return (EOF); |
| 3168 | #endif /* !__GO32__ */ |
| 3169 | } |
| 3170 | } |
| 3171 | |
| 3172 | char * |
| 3173 | _rl_savestring (str) |
| 3174 | char *str; |
| 3175 | { |
| 3176 | char *copy = (char*) xmalloc (strlen (str) + 1); |
| 3177 | strcpy (copy, str); |
| 3178 | return copy; |
| 3179 | } |
| 3180 | |
| 3181 | #if defined (STATIC_MALLOC) |
| 3182 | \f |
| 3183 | /* **************************************************************** */ |
| 3184 | /* */ |
| 3185 | /* xmalloc and xrealloc () */ |
| 3186 | /* */ |
| 3187 | /* **************************************************************** */ |
| 3188 | |
| 3189 | static void memory_error_and_abort (); |
| 3190 | |
| 3191 | static char * |
| 3192 | xmalloc (bytes) |
| 3193 | int bytes; |
| 3194 | { |
| 3195 | char *temp = (char *)malloc (bytes); |
| 3196 | |
| 3197 | if (!temp) |
| 3198 | memory_error_and_abort (); |
| 3199 | return (temp); |
| 3200 | } |
| 3201 | |
| 3202 | static char * |
| 3203 | xrealloc (pointer, bytes) |
| 3204 | char *pointer; |
| 3205 | int bytes; |
| 3206 | { |
| 3207 | char *temp; |
| 3208 | |
| 3209 | if (!pointer) |
| 3210 | temp = (char *)malloc (bytes); |
| 3211 | else |
| 3212 | temp = (char *)realloc (pointer, bytes); |
| 3213 | |
| 3214 | if (!temp) |
| 3215 | memory_error_and_abort (); |
| 3216 | |
| 3217 | return (temp); |
| 3218 | } |
| 3219 | |
| 3220 | static void |
| 3221 | memory_error_and_abort () |
| 3222 | { |
| 3223 | fprintf (stderr, "readline: Out of virtual memory!\n"); |
| 3224 | abort (); |
| 3225 | } |
| 3226 | #endif /* STATIC_MALLOC */ |
| 3227 | |
| 3228 | \f |
| 3229 | /* **************************************************************** */ |
| 3230 | /* */ |
| 3231 | /* Testing Readline */ |
| 3232 | /* */ |
| 3233 | /* **************************************************************** */ |
| 3234 | |
| 3235 | #if defined (TEST) |
| 3236 | |
| 3237 | main () |
| 3238 | { |
| 3239 | HIST_ENTRY **history_list (); |
| 3240 | char *temp = (char *)NULL; |
| 3241 | char *prompt = "readline% "; |
| 3242 | int done = 0; |
| 3243 | |
| 3244 | while (!done) |
| 3245 | { |
| 3246 | temp = readline (prompt); |
| 3247 | |
| 3248 | /* Test for EOF. */ |
| 3249 | if (!temp) |
| 3250 | exit (1); |
| 3251 | |
| 3252 | /* If there is anything on the line, print it and remember it. */ |
| 3253 | if (*temp) |
| 3254 | { |
| 3255 | fprintf (stderr, "%s\r\n", temp); |
| 3256 | add_history (temp); |
| 3257 | } |
| 3258 | |
| 3259 | /* Check for `command' that we handle. */ |
| 3260 | if (strcmp (temp, "quit") == 0) |
| 3261 | done = 1; |
| 3262 | |
| 3263 | if (strcmp (temp, "list") == 0) |
| 3264 | { |
| 3265 | HIST_ENTRY **list = history_list (); |
| 3266 | register int i; |
| 3267 | if (list) |
| 3268 | { |
| 3269 | for (i = 0; list[i]; i++) |
| 3270 | { |
| 3271 | fprintf (stderr, "%d: %s\r\n", i, list[i]->line); |
| 3272 | free (list[i]->line); |
| 3273 | } |
| 3274 | free (list); |
| 3275 | } |
| 3276 | } |
| 3277 | free (temp); |
| 3278 | } |
| 3279 | } |
| 3280 | |
| 3281 | #endif /* TEST */ |
| 3282 | |
| 3283 | \f |
| 3284 | /* |
| 3285 | * Local variables: |
| 3286 | * compile-command: "gcc -g -traditional -I. -I.. -DTEST -o readline readline.c keymaps.o funmap.o history.o -ltermcap" |
| 3287 | * end: |
| 3288 | */ |