1 /* 2 * Copyright (C) 1984-2025 Mark Nudelman 3 * 4 * You may distribute under the terms of either the GNU General Public 5 * License or the Less License, as specified in the README file. 6 * 7 * For more information, see the README file. 8 */ 9 10 11 /* 12 * The option table. 13 */ 14 15 #include "less.h" 16 #include "option.h" 17 18 /* 19 * Variables controlled by command line options. 20 */ 21 public int quiet; /* Should we suppress the audible bell? */ 22 public int no_vbell; /* Should we suppress the visual bell? */ 23 public int how_search; /* Where should forward searches start? */ 24 public int top_scroll; /* Repaint screen from top? 25 (alternative is scroll from bottom) */ 26 public int pr_type; /* Type of prompt (short, medium, long) */ 27 public int bs_mode; /* How to process backspaces */ 28 public int know_dumb; /* Don't complain about dumb terminals */ 29 public int quit_at_eof; /* Quit after hitting end of file twice */ 30 public int quit_if_one_screen; /* Quit if EOF on first screen */ 31 public int squeeze; /* Squeeze multiple blank lines into one */ 32 public int tabstop; /* Tab settings */ 33 public int back_scroll; /* Repaint screen on backwards movement */ 34 public int forw_scroll; /* Repaint screen on forward movement */ 35 public int caseless; /* Do "caseless" searches */ 36 public int linenums; /* Use line numbers */ 37 public int autobuf; /* Automatically allocate buffers as needed */ 38 public int bufspace; /* Max buffer space per file (K) */ 39 public int ctldisp; /* Send control chars to screen untranslated */ 40 public int force_open; /* Open the file even if not regular file */ 41 public int swindow; /* Size of scrolling window */ 42 public int jump_sline; /* Screen line of "jump target" */ 43 public long jump_sline_fraction = -1; 44 public int shift_count; /* Number of positions to shift horizontally */ 45 public long shift_count_fraction = -1; 46 public int chopline; /* Truncate displayed lines at screen width */ 47 public int wordwrap; /* Wrap lines at space */ 48 public int no_init; /* Disable sending ti/te termcap strings */ 49 public int no_keypad; /* Disable sending ks/ke termcap strings */ 50 public int twiddle; /* Show tildes after EOF */ 51 public int show_attn; /* Hilite first unread line */ 52 public int status_col; /* Display a status column */ 53 public int use_lessopen; /* Use the LESSOPEN filter */ 54 public int quit_on_intr; /* Quit on interrupt */ 55 public int follow_mode; /* F cmd Follows file desc or file name? */ 56 public int oldbot; /* Old bottom of screen behavior {{REMOVE}} */ 57 public int opt_use_backslash; /* Use backslash escaping in option parsing */ 58 public LWCHAR rscroll_char; /* Char which marks chopped lines with -S */ 59 public int rscroll_attr; /* Attribute of rscroll_char */ 60 public int no_hist_dups; /* Remove dups from history list */ 61 public int mousecap; /* Allow mouse for scrolling */ 62 public int wheel_lines; /* Number of lines to scroll on mouse wheel scroll */ 63 public int perma_marks; /* Save marks in history file */ 64 public int linenum_width; /* Width of line numbers */ 65 public int status_col_width; /* Width of status column */ 66 public int incr_search; /* Incremental search */ 67 public int use_color; /* Use UI color */ 68 public int want_filesize; /* Scan to EOF if necessary to get file size */ 69 public int status_line; /* Highlight entire marked lines */ 70 public int header_lines; /* Freeze header lines at top of screen */ 71 public int header_cols; /* Freeze header columns at left of screen */ 72 public int nonum_headers; /* Don't give headers line numbers */ 73 public int nosearch_header_lines = 0; /* Don't search in header lines */ 74 public int nosearch_header_cols = 0; /* Don't search in header columns */ 75 public int redraw_on_quit; /* Redraw last screen after term deinit */ 76 public int def_search_type; /* */ 77 public int exit_F_on_close; /* Exit F command when input closes */ 78 public int modelines; /* Lines to read looking for modelines */ 79 public int show_preproc_error; /* Display msg when preproc exits with error */ 80 public int proc_backspace; /* Special handling of backspace */ 81 public int proc_tab; /* Special handling of tab */ 82 public int proc_return; /* Special handling of carriage return */ 83 public int match_shift; /* Extra horizontal shift on search match */ 84 public int no_paste; /* Don't accept pasted input */ 85 public int no_edit_warn; /* Don't warn when editing a LESSOPENed file */ 86 public int stop_on_form_feed; /* Stop scrolling on a line starting with form feed */ 87 public long match_shift_fraction = NUM_FRAC_DENOM/2; /* 1/2 of screen width */ 88 public char intr_char = CONTROL('X'); /* Char to interrupt reads */ 89 #if HILITE_SEARCH 90 public int hilite_search; /* Highlight matched search patterns? */ 91 #endif 92 93 public int less_is_more = 0; /* Make compatible with POSIX more */ 94 95 /* 96 * Long option names. 97 */ 98 static struct optname a_optname = { "search-skip-screen", NULL }; 99 static struct optname b_optname = { "buffers", NULL }; 100 static struct optname B__optname = { "auto-buffers", NULL }; 101 static struct optname c_optname = { "clear-screen", NULL }; 102 static struct optname d_optname = { "dumb", NULL }; 103 static struct optname D__optname = { "color", NULL }; 104 static struct optname e_optname = { "quit-at-eof", NULL }; 105 static struct optname f_optname = { "force", NULL }; 106 static struct optname F__optname = { "quit-if-one-screen", NULL }; 107 #if HILITE_SEARCH 108 static struct optname g_optname = { "hilite-search", NULL }; 109 #endif 110 static struct optname h_optname = { "max-back-scroll", NULL }; 111 static struct optname i_optname = { "ignore-case", NULL }; 112 static struct optname j_optname = { "jump-target", NULL }; 113 static struct optname J__optname = { "status-column", NULL }; 114 #if USERFILE 115 static struct optname k_optname = { "lesskey-file", NULL }; 116 #if HAVE_LESSKEYSRC 117 static struct optname ks_optname = { "lesskey-src", NULL }; 118 static struct optname kc_optname = { "lesskey-content", NULL }; 119 #endif /* HAVE_LESSKEYSRC */ 120 #endif 121 static struct optname K__optname = { "quit-on-intr", NULL }; 122 static struct optname L__optname = { "no-lessopen", NULL }; 123 static struct optname m_optname = { "long-prompt", NULL }; 124 static struct optname n_optname = { "line-numbers", NULL }; 125 #if LOGFILE 126 static struct optname o_optname = { "log-file", NULL }; 127 static struct optname O__optname = { "LOG-FILE", NULL }; 128 #endif 129 static struct optname p_optname = { "pattern", NULL }; 130 static struct optname P__optname = { "prompt", NULL }; 131 static struct optname q2_optname = { "silent", NULL }; 132 static struct optname q_optname = { "quiet", &q2_optname }; 133 static struct optname r_optname = { "raw-control-chars", NULL }; 134 static struct optname s_optname = { "squeeze-blank-lines", NULL }; 135 static struct optname S__optname = { "chop-long-lines", NULL }; 136 #if TAGS 137 static struct optname t_optname = { "tag", NULL }; 138 static struct optname T__optname = { "tag-file", NULL }; 139 #endif 140 static struct optname u_optname = { "underline-special", NULL }; 141 static struct optname V__optname = { "version", NULL }; 142 static struct optname w_optname = { "hilite-unread", NULL }; 143 static struct optname x_optname = { "tabs", NULL }; 144 static struct optname X__optname = { "no-init", NULL }; 145 static struct optname y_optname = { "max-forw-scroll", NULL }; 146 static struct optname z_optname = { "window", NULL }; 147 static struct optname quote_optname = { "quotes", NULL }; 148 static struct optname tilde_optname = { "tilde", NULL }; 149 static struct optname query_optname = { "help", NULL }; 150 static struct optname pound_optname = { "shift", NULL }; 151 static struct optname keypad_optname = { "no-keypad", NULL }; 152 static struct optname oldbot_optname = { "old-bot", NULL }; 153 static struct optname follow_optname = { "follow-name", NULL }; 154 static struct optname use_backslash_optname = { "use-backslash", NULL }; 155 static struct optname rscroll_optname = { "rscroll", NULL }; 156 static struct optname nohistdups_optname = { "no-histdups", NULL }; 157 static struct optname mousecap_optname = { "mouse", NULL }; 158 static struct optname wheel_lines_optname = { "wheel-lines", NULL }; 159 static struct optname perma_marks_optname = { "save-marks", NULL }; 160 static struct optname linenum_width_optname = { "line-num-width", NULL }; 161 static struct optname status_col_width_optname = { "status-col-width", NULL }; 162 static struct optname incr_search_optname = { "incsearch", NULL }; 163 static struct optname use_color_optname = { "use-color", NULL }; 164 static struct optname want_filesize_optname = { "file-size", NULL }; 165 static struct optname status_line_optname = { "status-line", NULL }; 166 static struct optname header_optname = { "header", NULL }; 167 static struct optname no_paste_optname = { "no-paste", NULL }; 168 static struct optname form_feed_optname = { "form-feed", NULL }; 169 static struct optname no_edit_warn_optname2 = { "no-warn-edit", NULL }; 170 static struct optname no_edit_warn_optname = { "no-edit-warn", &no_edit_warn_optname2 }; 171 static struct optname nonum_headers_optname = { "no-number-headers", NULL }; 172 static struct optname nosearch_headers_optname = { "no-search-headers", NULL }; 173 static struct optname nosearch_header_lines_optname = { "no-search-header-lines", NULL }; 174 static struct optname nosearch_header_cols_optname = { "no-search-header-columns", NULL }; 175 static struct optname redraw_on_quit_optname = { "redraw-on-quit", NULL }; 176 static struct optname search_type_optname = { "search-options", NULL }; 177 static struct optname exit_F_on_close_optname = { "exit-follow-on-close", NULL }; 178 static struct optname modelines_optname = { "modelines", NULL }; 179 static struct optname no_vbell_optname = { "no-vbell", NULL }; 180 static struct optname intr_optname = { "intr", NULL }; 181 static struct optname wordwrap_optname = { "wordwrap", NULL }; 182 static struct optname show_preproc_error_optname = { "show-preproc-errors", NULL }; 183 static struct optname proc_backspace_optname = { "proc-backspace", NULL }; 184 static struct optname proc_tab_optname = { "proc-tab", NULL }; 185 static struct optname proc_return_optname = { "proc-return", NULL }; 186 static struct optname match_shift_optname = { "match-shift", NULL }; 187 #if LESSTEST 188 static struct optname ttyin_name_optname = { "tty", NULL }; 189 #endif /*LESSTEST*/ 190 191 192 /* 193 * Table of all options and their semantics. 194 * 195 * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are 196 * the description of the option when set to 0, 1 or 2, respectively. 197 * For NUMBER options, odesc[0] is the prompt to use when entering 198 * a new value, and odesc[1] is the description, which should contain 199 * one %d which is replaced by the value of the number. 200 * For STRING options, odesc[0] is the prompt to use when entering 201 * a new value, and odesc[1], if not NULL, is the set of characters 202 * that are valid in the string. 203 */ 204 static struct loption option[] = 205 { 206 { 'a', &a_optname, 207 O_TRIPLE, OPT_ONPLUS, &how_search, NULL, 208 { 209 "Search includes displayed screen", 210 "Search skips displayed screen", 211 "Search includes all of displayed screen" 212 } 213 }, 214 215 { 'b', &b_optname, 216 O_NUMBER|O_INIT_HANDLER, 64, &bufspace, opt_b, 217 { 218 "Max buffer space per file (K): ", 219 "Max buffer space per file: %dK", 220 NULL 221 } 222 }, 223 { 'B', &B__optname, 224 O_BOOL, OPT_ON, &autobuf, NULL, 225 { 226 "Don't automatically allocate buffers", 227 "Automatically allocate buffers when needed", 228 NULL 229 } 230 }, 231 { 'c', &c_optname, 232 O_TRIPLE, OPT_OFF, &top_scroll, NULL, 233 { 234 "Repaint by scrolling from bottom of screen", 235 "Repaint by painting from top of screen", 236 "Repaint by painting from top of screen" 237 } 238 }, 239 { 'd', &d_optname, 240 O_BOOL|O_NO_TOGGLE, OPT_OFF, &know_dumb, NULL, 241 { 242 "Assume intelligent terminal", 243 "Assume dumb terminal", 244 NULL 245 } 246 }, 247 { 'D', &D__optname, 248 O_STRING|O_REPAINT|O_NO_QUERY, 0, NULL, opt_D, 249 { "color desc: ", "s", NULL } 250 }, 251 { 'e', &e_optname, 252 O_TRIPLE, OPT_OFF, &quit_at_eof, NULL, 253 { 254 "Don't quit at end-of-file", 255 "Quit at end-of-file", 256 "Quit immediately at end-of-file" 257 } 258 }, 259 { 'f', &f_optname, 260 O_BOOL, OPT_OFF, &force_open, NULL, 261 { 262 "Open only regular files", 263 "Open even non-regular files", 264 NULL 265 } 266 }, 267 { 'F', &F__optname, 268 O_BOOL, OPT_OFF, &quit_if_one_screen, NULL, 269 { 270 "Don't quit if end-of-file on first screen", 271 "Quit if end-of-file on first screen", 272 NULL 273 } 274 }, 275 #if HILITE_SEARCH 276 { 'g', &g_optname, 277 O_TRIPLE|O_HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL, 278 { 279 "Don't highlight search matches", 280 "Highlight matches for previous search only", 281 "Highlight all matches for previous search pattern", 282 } 283 }, 284 #endif 285 { 'h', &h_optname, 286 O_NUMBER, -1, &back_scroll, NULL, 287 { 288 "Backwards scroll limit: ", 289 "Backwards scroll limit is %d lines", 290 NULL 291 } 292 }, 293 { 'i', &i_optname, 294 O_TRIPLE|O_HL_REPAINT, OPT_OFF, &caseless, opt_i, 295 { 296 "Case is significant in searches", 297 "Ignore case in searches", 298 "Ignore case in searches and in patterns" 299 } 300 }, 301 { 'j', &j_optname, 302 O_STRING, 0, NULL, opt_j, 303 { 304 "Target line: ", 305 "-.d", 306 NULL 307 } 308 }, 309 { 'J', &J__optname, 310 O_BOOL|O_REPAINT, OPT_OFF, &status_col, NULL, 311 { 312 "Don't display a status column", 313 "Display a status column", 314 NULL 315 } 316 }, 317 #if USERFILE 318 { 'k', &k_optname, 319 O_STRING|O_NO_TOGGLE|O_NO_QUERY, 0, NULL, opt_k, 320 { NULL, NULL, NULL } 321 }, 322 #if HAVE_LESSKEYSRC 323 { OLETTER_NONE, &kc_optname, 324 O_STRING|O_NO_TOGGLE|O_NO_QUERY, 0, NULL, opt_kc, 325 { NULL, NULL, NULL } 326 }, 327 { OLETTER_NONE, &ks_optname, 328 O_STRING|O_NO_TOGGLE|O_NO_QUERY, 0, NULL, opt_ks, 329 { NULL, NULL, NULL } 330 }, 331 #endif /* HAVE_LESSKEYSRC */ 332 #endif 333 { 'K', &K__optname, 334 O_BOOL, OPT_OFF, &quit_on_intr, NULL, 335 { 336 "Interrupt (ctrl-C) returns to prompt", 337 "Interrupt (ctrl-C) exits less", 338 NULL 339 } 340 }, 341 { 'L', &L__optname, 342 O_BOOL, OPT_ON, &use_lessopen, NULL, 343 { 344 "Don't use the LESSOPEN filter", 345 "Use the LESSOPEN filter", 346 NULL 347 } 348 }, 349 { 'm', &m_optname, 350 O_TRIPLE, OPT_OFF, &pr_type, NULL, 351 { 352 "Short prompt", 353 "Medium prompt", 354 "Long prompt" 355 } 356 }, 357 { 'n', &n_optname, 358 O_TRIPLE|O_REPAINT, OPT_ON, &linenums, NULL, 359 { 360 "Don't use line numbers", 361 "Use line numbers", 362 "Constantly display line numbers" 363 } 364 }, 365 #if LOGFILE 366 { 'o', &o_optname, 367 O_STRING, 0, NULL, opt_o, 368 { "log file: ", NULL, NULL } 369 }, 370 { 'O', &O__optname, 371 O_STRING, 0, NULL, opt__O, 372 { "Log file: ", NULL, NULL } 373 }, 374 #endif 375 { 'p', &p_optname, 376 O_STRING|O_NO_TOGGLE|O_NO_QUERY, 0, NULL, opt_p, 377 { NULL, NULL, NULL } 378 }, 379 { 'P', &P__optname, 380 O_STRING, 0, NULL, opt__P, 381 { "prompt: ", NULL, NULL } 382 }, 383 { 'q', &q_optname, 384 O_TRIPLE, OPT_OFF, &quiet, NULL, 385 { 386 "Ring the bell for errors AND at eof/bof", 387 "Ring the bell for errors but not at eof/bof", 388 "Never ring the bell" 389 } 390 }, 391 { 'r', &r_optname, 392 O_TRIPLE|O_REPAINT, OPT_OFF, &ctldisp, NULL, 393 { 394 "Display control characters as ^X", 395 "Display control characters directly (not recommended)", 396 "Display ANSI sequences directly, other control characters as ^X" 397 } 398 }, 399 { 's', &s_optname, 400 O_BOOL|O_REPAINT, OPT_OFF, &squeeze, NULL, 401 { 402 "Display all blank lines", 403 "Squeeze multiple blank lines", 404 NULL 405 } 406 }, 407 { 'S', &S__optname, 408 O_BOOL|O_REPAINT, OPT_OFF, &chopline, opt__S, 409 { 410 "Fold long lines", 411 "Chop long lines", 412 NULL 413 } 414 }, 415 #if TAGS 416 { 't', &t_optname, 417 O_STRING|O_NO_QUERY, 0, NULL, opt_t, 418 { "tag: ", NULL, NULL } 419 }, 420 { 'T', &T__optname, 421 O_STRING, 0, NULL, opt__T, 422 { "tags file: ", NULL, NULL } 423 }, 424 #endif 425 { 'u', &u_optname, 426 O_TRIPLE|O_REPAINT|O_HL_REPAINT, OPT_OFF, &bs_mode, NULL, 427 { 428 "Display underlined text in underline mode", 429 "Backspaces cause overstrike", 430 "Print backspace as ^H" 431 } 432 }, 433 { 'V', &V__optname, 434 O_NOVAR, 0, NULL, opt__V, 435 { NULL, NULL, NULL } 436 }, 437 { 'w', &w_optname, 438 O_TRIPLE|O_REPAINT, OPT_OFF, &show_attn, NULL, 439 { 440 "Don't highlight first unread line", 441 "Highlight first unread line after forward-screen", 442 "Highlight first unread line after any forward movement", 443 } 444 }, 445 { 'x', &x_optname, 446 O_STRING|O_REPAINT, 0, NULL, opt_x, 447 { 448 "Tab stops: ", 449 "d,", 450 NULL 451 } 452 }, 453 { 'X', &X__optname, 454 O_BOOL|O_NO_TOGGLE, OPT_OFF, &no_init, NULL, 455 { 456 "Send init/deinit strings to terminal", 457 "Don't use init/deinit strings", 458 NULL 459 } 460 }, 461 { 'y', &y_optname, 462 O_NUMBER, -1, &forw_scroll, NULL, 463 { 464 "Forward scroll limit: ", 465 "Forward scroll limit is %d lines", 466 NULL 467 } 468 }, 469 { 'z', &z_optname, 470 O_NUMBER, -1, &swindow, NULL, 471 { 472 "Scroll window size: ", 473 "Scroll window size is %d lines", 474 NULL 475 } 476 }, 477 { '"', "e_optname, 478 O_STRING, 0, NULL, opt_quote, 479 { "quotes: ", "s", NULL } 480 }, 481 { '~', &tilde_optname, 482 O_BOOL|O_REPAINT, OPT_ON, &twiddle, NULL, 483 { 484 "Don't show tildes after end of file", 485 "Show tildes after end of file", 486 NULL 487 } 488 }, 489 { '?', &query_optname, 490 O_NOVAR, 0, NULL, opt_query, 491 { NULL, NULL, NULL } 492 }, 493 { '#', £_optname, 494 O_STRING, 0, NULL, opt_shift, 495 { 496 "Horizontal shift: ", 497 ".d", 498 NULL 499 } 500 }, 501 { OLETTER_NONE, &keypad_optname, 502 O_BOOL|O_NO_TOGGLE, OPT_OFF, &no_keypad, NULL, 503 { 504 "Use keypad mode", 505 "Don't use keypad mode", 506 NULL 507 } 508 }, 509 { OLETTER_NONE, &oldbot_optname, 510 O_BOOL, OPT_OFF, &oldbot, NULL, 511 { 512 "Use new bottom of screen behavior", 513 "Use old bottom of screen behavior", 514 NULL 515 } 516 }, 517 { OLETTER_NONE, &follow_optname, 518 O_BOOL, FOLLOW_DESC, &follow_mode, NULL, 519 { 520 "F command follows file descriptor", 521 "F command follows file name", 522 NULL 523 } 524 }, 525 { OLETTER_NONE, &use_backslash_optname, 526 O_BOOL, OPT_OFF, &opt_use_backslash, NULL, 527 { 528 "Use backslash escaping in command line parameters", 529 "Don't use backslash escaping in command line parameters", 530 NULL 531 } 532 }, 533 { OLETTER_NONE, &rscroll_optname, 534 O_STRING|O_REPAINT|O_INIT_HANDLER, 0, NULL, opt_rscroll, 535 { "rscroll character: ", "s", NULL } 536 }, 537 { OLETTER_NONE, &nohistdups_optname, 538 O_BOOL, OPT_OFF, &no_hist_dups, NULL, 539 { 540 "Allow duplicates in history list", 541 "Remove duplicates from history list", 542 NULL 543 } 544 }, 545 { OLETTER_NONE, &mousecap_optname, 546 O_TRIPLE, OPT_OFF, &mousecap, opt_mousecap, 547 { 548 "Ignore mouse input", 549 "Use the mouse for scrolling", 550 "Use the mouse for scrolling (reverse)" 551 } 552 }, 553 { OLETTER_NONE, &wheel_lines_optname, 554 O_NUMBER|O_INIT_HANDLER, 0, &wheel_lines, opt_wheel_lines, 555 { 556 "Lines to scroll on mouse wheel: ", 557 "Scroll %d line(s) on mouse wheel", 558 NULL 559 } 560 }, 561 { OLETTER_NONE, &perma_marks_optname, 562 O_BOOL, OPT_OFF, &perma_marks, NULL, 563 { 564 "Don't save marks in history file", 565 "Save marks in history file", 566 NULL 567 } 568 }, 569 { OLETTER_NONE, &linenum_width_optname, 570 O_NUMBER|O_REPAINT, MIN_LINENUM_WIDTH, &linenum_width, opt_linenum_width, 571 { 572 "Line number width: ", 573 "Line number width is %d chars", 574 NULL 575 } 576 }, 577 { OLETTER_NONE, &status_col_width_optname, 578 O_NUMBER|O_REPAINT, 2, &status_col_width, opt_status_col_width, 579 { 580 "Status column width: ", 581 "Status column width is %d chars", 582 NULL 583 } 584 }, 585 { OLETTER_NONE, &incr_search_optname, 586 O_BOOL, OPT_OFF, &incr_search, NULL, 587 { 588 "Incremental search is off", 589 "Incremental search is on", 590 NULL 591 } 592 }, 593 { OLETTER_NONE, &use_color_optname, 594 O_BOOL|O_REPAINT, OPT_OFF, &use_color, NULL, 595 { 596 "Don't use color", 597 "Use color", 598 NULL 599 } 600 }, 601 { OLETTER_NONE, &want_filesize_optname, 602 O_BOOL|O_REPAINT, OPT_OFF, &want_filesize, opt_filesize, 603 { 604 "Don't get size of each file", 605 "Get size of each file", 606 NULL 607 } 608 }, 609 { OLETTER_NONE, &status_line_optname, 610 O_BOOL|O_REPAINT, OPT_OFF, &status_line, NULL, 611 { 612 "Don't color each line with its status column color", 613 "Color each line with its status column color", 614 NULL 615 } 616 }, 617 { OLETTER_NONE, &header_optname, 618 O_STRING|O_REPAINT, 0, NULL, opt_header, 619 { "Header lines: ", "d,", NULL } 620 }, 621 { OLETTER_NONE, &no_paste_optname, 622 O_BOOL, OPT_OFF, &no_paste, opt_no_paste, 623 { 624 "Accept pasted input", 625 "Ignore pasted input", 626 NULL 627 } 628 }, 629 { OLETTER_NONE, &form_feed_optname, 630 O_BOOL, OPT_OFF, &stop_on_form_feed, NULL, 631 { 632 "Don't stop on form feed", 633 "Stop on form feed", 634 NULL 635 } 636 }, 637 { OLETTER_NONE, &no_edit_warn_optname, 638 O_BOOL, OPT_OFF, &no_edit_warn, NULL, 639 { 640 "Warn when editing a file opened via LESSOPEN", 641 "Don't warn when editing a file opened via LESSOPEN", 642 NULL 643 } 644 }, 645 { OLETTER_NONE, &nonum_headers_optname, 646 O_BOOL|O_REPAINT, 0, &nonum_headers, NULL, 647 { 648 "Number header lines", 649 "Don't number header lines", 650 NULL 651 } 652 }, 653 { OLETTER_NONE, &nosearch_headers_optname, 654 O_BOOL|O_HL_REPAINT, 0, NULL, opt_nosearch_headers, 655 { 656 NULL, NULL, NULL 657 } 658 }, 659 { OLETTER_NONE, &nosearch_header_lines_optname, 660 O_BOOL|O_HL_REPAINT, 0, NULL, opt_nosearch_header_lines, 661 { 662 NULL, NULL, NULL 663 } 664 }, 665 { OLETTER_NONE, &nosearch_header_cols_optname, 666 O_BOOL|O_HL_REPAINT, 0, NULL, opt_nosearch_header_cols, 667 { 668 NULL, NULL, NULL 669 } 670 }, 671 { OLETTER_NONE, &redraw_on_quit_optname, 672 O_BOOL, OPT_OFF, &redraw_on_quit, NULL, 673 { 674 "Don't redraw screen when quitting", 675 "Redraw last screen when quitting", 676 NULL 677 } 678 }, 679 { OLETTER_NONE, &search_type_optname, 680 O_STRING, 0, NULL, opt_search_type, 681 { "Search options: ", "s", NULL } 682 }, 683 { OLETTER_NONE, &exit_F_on_close_optname, 684 O_BOOL, OPT_OFF, &exit_F_on_close, NULL, 685 { 686 "Don't exit F command when input closes", 687 "Exit F command when input closes", 688 NULL 689 } 690 }, 691 { OLETTER_NONE, &no_vbell_optname, 692 O_BOOL, OPT_OFF, &no_vbell, NULL, 693 { 694 "Display visual bell", 695 "Don't display visual bell", 696 NULL 697 } 698 }, 699 { OLETTER_NONE, &modelines_optname, 700 O_NUMBER, 0, &modelines, NULL, 701 { 702 "Lines to read looking for modelines: ", 703 "Read %d lines looking for modelines", 704 NULL 705 } 706 }, 707 { OLETTER_NONE, &intr_optname, 708 O_STRING, 0, NULL, opt_intr, 709 { "interrupt character: ", "s", NULL } 710 }, 711 { OLETTER_NONE, &wordwrap_optname, 712 O_BOOL|O_REPAINT, OPT_OFF, &wordwrap, NULL, 713 { 714 "Wrap lines at any character", 715 "Wrap lines at spaces", 716 NULL 717 } 718 }, 719 { OLETTER_NONE, &show_preproc_error_optname, 720 O_BOOL, OPT_OFF, &show_preproc_error, NULL, 721 { 722 "Don't show error message if preprocessor fails", 723 "Show error message if preprocessor fails", 724 NULL 725 } 726 }, 727 { OLETTER_NONE, &proc_backspace_optname, 728 O_TRIPLE|O_REPAINT|O_HL_REPAINT, OPT_OFF, &proc_backspace, NULL, 729 { 730 "Backspace handling is specified by the -U option", 731 "Display underline text in underline mode", 732 "Print backspaces as ^H" 733 } 734 }, 735 { OLETTER_NONE, &proc_tab_optname, 736 O_TRIPLE|O_REPAINT|O_HL_REPAINT, OPT_OFF, &proc_tab, NULL, 737 { 738 "Tab handling is specified by the -U option", 739 "Expand tabs to spaces", 740 "Print tabs as ^I" 741 } 742 }, 743 { OLETTER_NONE, &proc_return_optname, 744 O_TRIPLE|O_REPAINT|O_HL_REPAINT, OPT_OFF, &proc_return, NULL, 745 { 746 "Carriage return handling is specified by the -U option", 747 "Delete carriage return before newline", 748 "Print carriage return as ^M" 749 } 750 }, 751 { OLETTER_NONE, &match_shift_optname, 752 O_STRING|O_INIT_HANDLER, 0, NULL, opt_match_shift, 753 { 754 "Search match shift: ", 755 ".d", 756 NULL 757 } 758 }, 759 #if LESSTEST 760 { OLETTER_NONE, &ttyin_name_optname, 761 O_STRING|O_NO_TOGGLE, 0, NULL, opt_ttyin_name, 762 { 763 NULL, 764 NULL, 765 NULL 766 } 767 }, 768 #endif /*LESSTEST*/ 769 { '\0', NULL, O_NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } } 770 }; 771 772 773 /* 774 * Initialize each option to its default value. 775 */ 776 public void init_option(void) 777 { 778 struct loption *o; 779 constant char *p; 780 781 p = lgetenv("LESS_IS_MORE"); 782 if (!isnullenv(p) && !(p[0] == '0' && p[1] == '\0')) 783 less_is_more = 1; 784 785 for (o = option; o->oletter != '\0'; o++) 786 { 787 /* 788 * Set each variable to its default. 789 */ 790 if (o->ovar != NULL) 791 *(o->ovar) = o->odefault; 792 if (o->otype & O_INIT_HANDLER) 793 (*(o->ofunc))(INIT, (char *) NULL); 794 } 795 } 796 797 /* 798 * Find an option in the option table, given its option letter. 799 */ 800 public struct loption * findopt(int c) 801 { 802 struct loption *o; 803 804 for (o = option; o->oletter != '\0'; o++) 805 { 806 if (o->oletter == c) 807 return (o); 808 if ((o->otype & O_TRIPLE) && ASCII_TO_UPPER(o->oletter) == c) 809 return (o); 810 } 811 return (NULL); 812 } 813 814 /* 815 * 816 */ 817 static lbool is_optchar(char c) 818 { 819 if (ASCII_IS_UPPER(c)) 820 return TRUE; 821 if (ASCII_IS_LOWER(c)) 822 return TRUE; 823 if (c == '-') 824 return TRUE; 825 return FALSE; 826 } 827 828 /* 829 * Find an option in the option table, given its option name. 830 * p_optname is the (possibly partial) name to look for, and 831 * is updated to point after the matched name. 832 * p_oname if non-NULL is set to point to the full option name. 833 */ 834 public struct loption * findopt_name(constant char **p_optname, constant char **p_oname, lbool *p_ambig) 835 { 836 constant char *optname = *p_optname; 837 struct loption *o; 838 struct optname *oname; 839 size_t len; 840 int uppercase; 841 struct loption *maxo = NULL; 842 struct optname *maxoname = NULL; 843 size_t maxlen = 0; 844 lbool ambig = FALSE; 845 lbool exact = FALSE; 846 847 /* 848 * Check all options. 849 */ 850 for (o = option; o->oletter != '\0'; o++) 851 { 852 /* 853 * Check all names for this option. 854 */ 855 for (oname = o->onames; oname != NULL; oname = oname->onext) 856 { 857 /* 858 * Try normal match first (uppercase == 0), 859 * then, then if it's a TRIPLE option, 860 * try uppercase match (uppercase == 1). 861 */ 862 for (uppercase = 0; uppercase <= 1; uppercase++) 863 { 864 len = sprefix(optname, oname->oname, uppercase); 865 if (len == 0 || is_optchar(optname[len])) 866 { 867 /* 868 * We didn't use all of the option name. 869 */ 870 continue; 871 } 872 if (!exact && len == maxlen) 873 /* 874 * Already had a partial match, 875 * and now there's another one that 876 * matches the same length. 877 */ 878 ambig = TRUE; 879 else if (len > maxlen) 880 { 881 /* 882 * Found a better match than 883 * the one we had. 884 */ 885 maxo = o; 886 maxoname = oname; 887 maxlen = len; 888 ambig = FALSE; 889 exact = (len == strlen(oname->oname)); 890 } 891 if (!(o->otype & O_TRIPLE)) 892 break; 893 } 894 } 895 } 896 if (p_ambig != NULL) 897 *p_ambig = ambig; 898 if (ambig) 899 { 900 /* 901 * Name matched more than one option. 902 */ 903 return (NULL); 904 } 905 *p_optname = optname + maxlen; 906 if (p_oname != NULL) 907 *p_oname = maxoname == NULL ? NULL : maxoname->oname; 908 return (maxo); 909 } 910 911 /* 912 * Find all toggleable options whose names begin with a specified string. 913 * Return them in a space-separated string. 914 */ 915 public char * findopts_name(constant char *pfx) 916 { 917 constant struct loption *o; 918 constant struct optname *oname; 919 struct xbuffer xbuf; 920 int uppercase; 921 922 xbuf_init(&xbuf); 923 for (o = option; o->oletter != '\0'; o++) 924 { 925 if (o->otype & O_NO_TOGGLE) 926 continue; 927 for (oname = o->onames; oname != NULL; oname = oname->onext) 928 { 929 for (uppercase = 0; uppercase <= 1; uppercase++) 930 { 931 size_t len = sprefix(pfx, oname->oname, uppercase); 932 if (len >= strlen(pfx)) 933 { 934 constant char *np; 935 for (np = oname->oname; *np != '\0'; np++) 936 xbuf_add_char(&xbuf, uppercase && ASCII_IS_LOWER(*np) ? ASCII_TO_UPPER(*np) : *np); 937 xbuf_add_char(&xbuf, ' '); 938 } 939 if (!(o->otype & O_TRIPLE)) 940 break; 941 } 942 } 943 } 944 xbuf_pop(&xbuf); /* remove final space */ 945 xbuf_add_char(&xbuf, '\0'); 946 return (char *) xbuf.data; 947 } 948