Annotation of src/usr.bin/less/opttbl.c, Revision 1.14
1.1 etheisen 1: /*
1.12 shadchin 2: * Copyright (C) 1984-2012 Mark Nudelman
1.1 etheisen 3: *
1.6 millert 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.
1.1 etheisen 6: *
1.12 shadchin 7: * For more information, see the README file.
1.1 etheisen 8: */
1.14 ! nicm 9: /*
! 10: * Modified for use with illumos.
! 11: * Copyright 2014 Garrett D'Amore <garrett@damore.org>
! 12: */
1.1 etheisen 13:
14: /*
15: * The option table.
16: */
17:
18: #include "less.h"
19: #include "option.h"
20:
21: /*
22: * Variables controlled by command line options.
23: */
1.14 ! nicm 24: int quiet; /* Should we suppress the audible bell? */
! 25: int how_search; /* Where should forward searches start? */
! 26: int top_scroll; /* Repaint screen from top? (vs scroll from bottom) */
! 27: int pr_type; /* Type of prompt (short, medium, long) */
! 28: int bs_mode; /* How to process backspaces */
! 29: int know_dumb; /* Don't complain about dumb terminals */
! 30: int quit_at_eof; /* Quit after hitting end of file twice */
! 31: int quit_if_one_screen; /* Quit if EOF on first screen */
! 32: int squeeze; /* Squeeze multiple blank lines into one */
! 33: int back_scroll; /* Repaint screen on backwards movement */
! 34: int forw_scroll; /* Repaint screen on forward movement */
! 35: int caseless; /* Do "caseless" searches */
! 36: int linenums; /* Use line numbers */
! 37: int autobuf; /* Automatically allocate buffers as needed */
! 38: int bufspace; /* Max buffer space per file (K) */
! 39: int ctldisp; /* Send control chars to screen untranslated */
! 40: int force_open; /* Open the file even if not regular file */
! 41: int swindow; /* Size of scrolling window */
! 42: int jump_sline; /* Screen line of "jump target" */
! 43: long jump_sline_fraction = -1;
! 44: int chopline; /* Truncate displayed lines at screen width */
! 45: int no_init; /* Disable sending ti/te termcap strings */
! 46: int no_keypad; /* Disable sending ks/ke termcap strings */
! 47: int twiddle; /* Show tildes after EOF */
! 48: int show_attn; /* Hilite first unread line */
! 49: int status_col; /* Display a status column */
! 50: int use_lessopen; /* Use the LESSOPEN filter */
! 51: int quit_on_intr; /* Quit on interrupt */
! 52: int follow_mode; /* F cmd Follows file desc or file name? */
! 53: int oldbot; /* Old bottom of screen behavior {{REMOVE}} */
! 54: int opt_use_backslash; /* Use backslash escaping in option parsing */
! 55: int hilite_search; /* Highlight matched search patterns? */
1.1 etheisen 56:
1.14 ! nicm 57: int less_is_more = 0; /* Make compatible with POSIX more */
1.10 shadchin 58:
1.1 etheisen 59: /*
1.6 millert 60: * Long option names.
61: */
1.14 ! nicm 62: static struct optname a_optname = { "search-skip-screen", NULL };
! 63: static struct optname b_optname = { "buffers", NULL };
! 64: static struct optname B__optname = { "auto-buffers", NULL };
! 65: static struct optname c_optname = { "clear-screen", NULL };
! 66: static struct optname d_optname = { "dumb", NULL };
! 67: static struct optname e_optname = { "quit-at-eof", NULL };
! 68: static struct optname f_optname = { "force", NULL };
! 69: static struct optname F__optname = { "quit-if-one-screen", NULL };
! 70: static struct optname g_optname = { "hilite-search", NULL };
! 71: static struct optname h_optname = { "max-back-scroll", NULL };
! 72: static struct optname i_optname = { "ignore-case", NULL };
! 73: static struct optname j_optname = { "jump-target", NULL };
! 74: static struct optname J__optname = { "status-column", NULL };
! 75: static struct optname k_optname = { "lesskey-file", NULL };
! 76: static struct optname K__optname = { "quit-on-intr", NULL };
! 77: static struct optname L__optname = { "no-lessopen", NULL };
! 78: static struct optname m_optname = { "long-prompt", NULL };
! 79: static struct optname n_optname = { "line-numbers", NULL };
! 80: static struct optname o_optname = { "log-file", NULL };
! 81: static struct optname O__optname = { "LOG-FILE", NULL };
! 82: static struct optname p_optname = { "pattern", NULL };
! 83: static struct optname P__optname = { "prompt", NULL };
! 84: static struct optname q2_optname = { "silent", NULL };
! 85: static struct optname q_optname = { "quiet", &q2_optname };
! 86: static struct optname r_optname = { "raw-control-chars", NULL };
! 87: static struct optname s_optname = { "squeeze-blank-lines", NULL };
! 88: static struct optname S__optname = { "chop-long-lines", NULL };
! 89: static struct optname t_optname = { "tag", NULL };
! 90: static struct optname T__optname = { "tag-file", NULL };
! 91: static struct optname u_optname = { "underline-special", NULL };
! 92: static struct optname V__optname = { "version", NULL };
! 93: static struct optname w_optname = { "hilite-unread", NULL };
! 94: static struct optname x_optname = { "tabs", NULL };
! 95: static struct optname X__optname = { "no-init", NULL };
! 96: static struct optname y_optname = { "max-forw-scroll", NULL };
! 97: static struct optname z_optname = { "window", NULL };
! 98: static struct optname quote_optname = { "quotes", NULL };
! 99: static struct optname tilde_optname = { "tilde", NULL };
! 100: static struct optname query_optname = { "help", NULL };
! 101: static struct optname pound_optname = { "shift", NULL };
! 102: static struct optname keypad_optname = { "no-keypad", NULL };
! 103: static struct optname oldbot_optname = { "old-bot", NULL };
! 104: static struct optname follow_optname = { "follow-name", NULL };
! 105: static struct optname use_backslash_optname = { "use-backslash", NULL };
1.6 millert 106:
107:
108: /*
1.1 etheisen 109: * Table of all options and their semantics.
1.6 millert 110: *
111: * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are
112: * the description of the option when set to 0, 1 or 2, respectively.
113: * For NUMBER options, odesc[0] is the prompt to use when entering
1.14 ! nicm 114: * a new value, and odesc[1] is the description, which should contain
1.6 millert 115: * one %d which is replaced by the value of the number.
116: * For STRING options, odesc[0] is the prompt to use when entering
117: * a new value, and odesc[1], if not NULL, is the set of characters
118: * that are valid in the string.
1.1 etheisen 119: */
1.14 ! nicm 120: static struct loption option[] = {
1.6 millert 121: { 'a', &a_optname,
1.10 shadchin 122: TRIPLE, OPT_ONPLUS, &how_search, NULL,
1.6 millert 123: {
124: "Search includes displayed screen",
125: "Search skips displayed screen",
1.10 shadchin 126: "Search includes all of displayed screen"
1.6 millert 127: }
128: },
129:
130: { 'b', &b_optname,
1.14 ! nicm 131: NUMBER|INIT_HANDLER, 64, &bufspace, opt_b,
1.6 millert 132: {
133: "Max buffer space per file (K): ",
134: "Max buffer space per file: %dK",
135: NULL
136: }
137: },
138: { 'B', &B__optname,
139: BOOL, OPT_ON, &autobuf, NULL,
140: {
141: "Don't automatically allocate buffers",
142: "Automatically allocate buffers when needed",
143: NULL
144: }
145: },
146: { 'c', &c_optname,
1.14 ! nicm 147: TRIPLE|MORE_OK, OPT_ON, &top_scroll, NULL,
1.6 millert 148: {
149: "Repaint by scrolling from bottom of screen",
1.10 shadchin 150: "Repaint by painting from top of screen",
1.6 millert 151: "Repaint by painting from top of screen"
152: }
153: },
154: { 'd', &d_optname,
1.14 ! nicm 155: BOOL|MORE_OK|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
1.6 millert 156: {
157: "Assume intelligent terminal",
158: "Assume dumb terminal",
159: NULL
160: }
161: },
162: { 'e', &e_optname,
163: TRIPLE, OPT_OFF, &quit_at_eof, NULL,
164: {
165: "Don't quit at end-of-file",
166: "Quit at end-of-file",
167: "Quit immediately at end-of-file"
168: }
169: },
170: { 'f', &f_optname,
171: BOOL, OPT_OFF, &force_open, NULL,
172: {
173: "Open only regular files",
174: "Open even non-regular files",
175: NULL
176: }
177: },
178: { 'F', &F__optname,
179: BOOL, OPT_OFF, &quit_if_one_screen, NULL,
180: {
181: "Don't quit if end-of-file on first screen",
182: "Quit if end-of-file on first screen",
183: NULL
184: }
1.1 etheisen 185: },
1.6 millert 186: { 'g', &g_optname,
187: TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
188: {
189: "Don't highlight search matches",
190: "Highlight matches for previous search only",
191: "Highlight all matches for previous search pattern",
192: }
193: },
194: { 'h', &h_optname,
195: NUMBER, -1, &back_scroll, NULL,
196: {
197: "Backwards scroll limit: ",
198: "Backwards scroll limit is %d lines",
1.7 millert 199: NULL
200: }
201: },
1.6 millert 202: { 'i', &i_optname,
203: TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i,
204: {
205: "Case is significant in searches",
206: "Ignore case in searches",
207: "Ignore case in searches and in patterns"
208: }
209: },
210: { 'j', &j_optname,
1.10 shadchin 211: STRING, 0, NULL, opt_j,
1.6 millert 212: {
213: "Target line: ",
1.10 shadchin 214: "0123456789.-",
1.6 millert 215: NULL
216: }
217: },
218: { 'J', &J__optname,
219: BOOL|REPAINT, OPT_OFF, &status_col, NULL,
220: {
221: "Don't display a status column",
222: "Display a status column",
223: NULL
224: }
1.1 etheisen 225: },
1.6 millert 226: { 'k', &k_optname,
227: STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k,
228: { NULL, NULL, NULL }
1.1 etheisen 229: },
1.10 shadchin 230: { 'K', &K__optname,
231: BOOL, OPT_OFF, &quit_on_intr, NULL,
232: {
233: "Interrupt (ctrl-C) returns to prompt",
234: "Interrupt (ctrl-C) exits less",
235: NULL
236: }
1.6 millert 237: },
238: { 'L', &L__optname,
239: BOOL, OPT_ON, &use_lessopen, NULL,
240: {
241: "Don't use the LESSOPEN filter",
242: "Use the LESSOPEN filter",
243: NULL
244: }
245: },
246: { 'm', &m_optname,
247: TRIPLE, OPT_OFF, &pr_type, NULL,
248: {
249: "Short prompt",
250: "Medium prompt",
251: "Long prompt"
252: }
253: },
254: { 'n', &n_optname,
255: TRIPLE|REPAINT, OPT_ON, &linenums, NULL,
256: {
257: "Don't use line numbers",
258: "Use line numbers",
259: "Constantly display line numbers"
260: }
1.1 etheisen 261: },
1.6 millert 262: { 'o', &o_optname,
263: STRING, 0, NULL, opt_o,
264: { "log file: ", NULL, NULL }
265: },
266: { 'O', &O__optname,
267: STRING, 0, NULL, opt__O,
268: { "Log file: ", NULL, NULL }
1.1 etheisen 269: },
1.6 millert 270: { 'p', &p_optname,
1.14 ! nicm 271: STRING|NO_TOGGLE|NO_QUERY|MORE_OK, 0, NULL, opt_p,
1.6 millert 272: { NULL, NULL, NULL }
273: },
274: { 'P', &P__optname,
275: STRING, 0, NULL, opt__P,
276: { "prompt: ", NULL, NULL }
277: },
278: { 'q', &q_optname,
279: TRIPLE, OPT_OFF, &quiet, NULL,
280: {
281: "Ring the bell for errors AND at eof/bof",
282: "Ring the bell for errors but not at eof/bof",
283: "Never ring the bell"
284: }
285: },
286: { 'r', &r_optname,
287: TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL,
288: {
289: "Display control characters as ^X",
290: "Display control characters directly",
1.14 ! nicm 291: "Display control characters directly, "
! 292: "processing ANSI sequences"
1.6 millert 293: }
294: },
295: { 's', &s_optname,
1.14 ! nicm 296: BOOL|REPAINT|MORE_OK, OPT_OFF, &squeeze, NULL,
1.6 millert 297: {
298: "Display all blank lines",
299: "Squeeze multiple blank lines",
300: NULL
301: }
302: },
303: { 'S', &S__optname,
304: BOOL|REPAINT, OPT_OFF, &chopline, NULL,
305: {
306: "Fold long lines",
307: "Chop long lines",
308: NULL
309: }
1.1 etheisen 310: },
1.6 millert 311: { 't', &t_optname,
1.14 ! nicm 312: STRING|NO_QUERY|MORE_OK, 0, NULL, opt_t,
1.6 millert 313: { "tag: ", NULL, NULL }
314: },
315: { 'T', &T__optname,
1.14 ! nicm 316: STRING|MORE_OK, 0, NULL, opt__T,
1.6 millert 317: { "tags file: ", NULL, NULL }
1.1 etheisen 318: },
1.6 millert 319: { 'u', &u_optname,
320: TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL,
321: {
322: "Display underlined text in underline mode",
323: "Backspaces cause overstrike",
324: "Print backspace as ^H"
325: }
326: },
327: { 'V', &V__optname,
328: NOVAR, 0, NULL, opt__V,
329: { NULL, NULL, NULL }
330: },
331: { 'w', &w_optname,
332: TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL,
333: {
334: "Don't highlight first unread line",
335: "Highlight first unread line after forward-screen",
1.14 ! nicm 336: "Highlight first unread line after any "
! 337: "forward movement",
1.6 millert 338: }
339: },
340: { 'x', &x_optname,
341: STRING|REPAINT, 0, NULL, opt_x,
342: {
343: "Tab stops: ",
344: "0123456789,",
345: NULL
346: }
347: },
348: { 'X', &X__optname,
349: BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL,
350: {
351: "Send init/deinit strings to terminal",
352: "Don't use init/deinit strings",
353: NULL
354: }
355: },
356: { 'y', &y_optname,
357: NUMBER, -1, &forw_scroll, NULL,
358: {
359: "Forward scroll limit: ",
360: "Forward scroll limit is %d lines",
361: NULL
362: }
363: },
364: { 'z', &z_optname,
365: NUMBER, -1, &swindow, NULL,
366: {
367: "Scroll window size: ",
368: "Scroll window size is %d lines",
369: NULL
370: }
371: },
372: { '"', "e_optname,
373: STRING, 0, NULL, opt_quote,
374: { "quotes: ", NULL, NULL }
375: },
376: { '~', &tilde_optname,
377: BOOL|REPAINT, OPT_ON, &twiddle, NULL,
378: {
379: "Don't show tildes after end of file",
380: "Show tildes after end of file",
381: NULL
382: }
383: },
384: { '?', &query_optname,
385: NOVAR, 0, NULL, opt_query,
386: { NULL, NULL, NULL }
387: },
388: { '#', £_optname,
1.10 shadchin 389: STRING, 0, NULL, opt_shift,
1.6 millert 390: {
391: "Horizontal shift: ",
1.10 shadchin 392: "0123456789.",
1.6 millert 393: NULL
394: }
395: },
1.10 shadchin 396: { OLETTER_NONE, &keypad_optname,
1.6 millert 397: BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL,
398: {
399: "Use keypad mode",
400: "Don't use keypad mode",
401: NULL
402: }
1.1 etheisen 403: },
1.10 shadchin 404: { OLETTER_NONE, &oldbot_optname,
405: BOOL, OPT_OFF, &oldbot, NULL,
406: {
407: "Use new bottom of screen behavior",
408: "Use old bottom of screen behavior",
409: NULL
410: }
411: },
412: { OLETTER_NONE, &follow_optname,
413: BOOL, FOLLOW_DESC, &follow_mode, NULL,
414: {
415: "F command follows file descriptor",
416: "F command follows file name",
1.12 shadchin 417: NULL
418: }
419: },
420: { OLETTER_NONE, &use_backslash_optname,
421: BOOL, OPT_OFF, &opt_use_backslash, NULL,
422: {
423: "Use backslash escaping in command line parameters",
1.14 ! nicm 424: "Don't use backslash escaping in command line "
! 425: "parameters",
1.10 shadchin 426: NULL
427: }
428: },
1.6 millert 429: { '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } }
1.1 etheisen 430: };
431:
432:
433: /*
434: * Initialize each option to its default value.
435: */
1.14 ! nicm 436: void
! 437: init_option(void)
1.1 etheisen 438: {
1.14 ! nicm 439: struct loption *o;
1.10 shadchin 440:
1.14 ! nicm 441: for (o = option; o->oletter != '\0'; o++) {
1.6 millert 442: /*
1.1 etheisen 443: * Set each variable to its default.
444: */
445: if (o->ovar != NULL)
446: *(o->ovar) = o->odefault;
1.6 millert 447: if (o->otype & INIT_HANDLER)
1.14 ! nicm 448: (*(o->ofunc))(INIT, NULL);
1.1 etheisen 449: }
450: }
451:
452: /*
1.6 millert 453: * Find an option in the option table, given its option letter.
1.1 etheisen 454: */
1.14 ! nicm 455: struct loption *
! 456: findopt(int c)
1.1 etheisen 457: {
1.14 ! nicm 458: struct loption *o;
1.1 etheisen 459:
1.14 ! nicm 460: for (o = option; o->oletter != '\0'; o++) {
1.1 etheisen 461: if (o->oletter == c)
462: return (o);
1.14 ! nicm 463: if ((o->otype & TRIPLE) && (toupper(o->oletter) == c))
1.1 etheisen 464: return (o);
465: }
466: return (NULL);
1.6 millert 467: }
468:
469: /*
470: *
471: */
1.14 ! nicm 472: static int
! 473: is_optchar(char c)
1.6 millert 474: {
1.14 ! nicm 475: if (isupper(c))
! 476: return (1);
! 477: if (islower(c))
! 478: return (1);
1.6 millert 479: if (c == '-')
1.14 ! nicm 480: return (1);
! 481: return (0);
1.6 millert 482: }
483:
484: /*
485: * Find an option in the option table, given its option name.
486: * p_optname is the (possibly partial) name to look for, and
487: * is updated to point after the matched name.
488: * p_oname if non-NULL is set to point to the full option name.
489: */
1.14 ! nicm 490: struct loption *
! 491: findopt_name(char **p_optname, char **p_oname, int *p_err)
1.6 millert 492: {
493: char *optname = *p_optname;
1.14 ! nicm 494: struct loption *o;
! 495: struct optname *oname;
! 496: int len;
1.6 millert 497: int uppercase;
498: struct loption *maxo = NULL;
499: struct optname *maxoname = NULL;
500: int maxlen = 0;
501: int ambig = 0;
502: int exact = 0;
503:
504: /*
505: * Check all options.
506: */
1.14 ! nicm 507: for (o = option; o->oletter != '\0'; o++) {
1.6 millert 508: /*
509: * Check all names for this option.
510: */
1.14 ! nicm 511: for (oname = o->onames; oname != NULL; oname = oname->onext) {
! 512: /*
1.6 millert 513: * Try normal match first (uppercase == 0),
514: * then, then if it's a TRIPLE option,
515: * try uppercase match (uppercase == 1).
516: */
1.14 ! nicm 517: for (uppercase = 0; uppercase <= 1; uppercase++) {
1.6 millert 518: len = sprefix(optname, oname->oname, uppercase);
1.14 ! nicm 519: if (len <= 0 || is_optchar(optname[len])) {
1.6 millert 520: /*
521: * We didn't use all of the option name.
522: */
523: continue;
524: }
1.14 ! nicm 525: if (!exact && len == maxlen) {
1.6 millert 526: /*
527: * Already had a partial match,
528: * and now there's another one that
529: * matches the same length.
530: */
531: ambig = 1;
1.14 ! nicm 532: } else if (len > maxlen) {
1.6 millert 533: /*
534: * Found a better match than
535: * the one we had.
536: */
537: maxo = o;
538: maxoname = oname;
539: maxlen = len;
540: ambig = 0;
1.14 ! nicm 541: exact = (len == strlen(oname->oname));
1.6 millert 542: }
543: if (!(o->otype & TRIPLE))
544: break;
545: }
546: }
547: }
1.14 ! nicm 548: if (ambig) {
1.6 millert 549: /*
550: * Name matched more than one option.
551: */
552: if (p_err != NULL)
553: *p_err = OPT_AMBIG;
554: return (NULL);
555: }
556: *p_optname = optname + maxlen;
557: if (p_oname != NULL)
558: *p_oname = maxoname == NULL ? NULL : maxoname->oname;
559: return (maxo);
1.1 etheisen 560: }
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