2 * Copyright (C) 1984-2009 Mark Nudelman
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.
7 * For more information about less, or for information on how to
8 * contact the author, see the README file.
13 * Handling functions for command line options.
15 * Most options are handled by the generic code in option.c.
16 * But all string options, and a few non-string options, require
17 * special handling specific to the particular option.
18 * This special processing is done by the "handling functions" in this file.
20 * Each handling function is passed a "type" and, if it is a string
21 * option, the string which should be "assigned" to the option.
22 * The type may be one of:
23 * INIT The option is being initialized from the command line.
24 * TOGGLE The option is being changed from within the program.
25 * QUERY The setting of the option is merely being queried.
34 extern int plusoption
;
40 extern int any_display
;
41 extern char openquote
;
42 extern char closequote
;
43 extern char *prproto
[];
47 extern IFILE curr_ifile
;
48 extern char version
[];
49 extern int jump_sline
;
50 extern int jump_sline_fraction
;
51 extern int shift_count
;
52 extern int shift_count_fraction
;
53 extern int less_is_more
;
55 extern char *namelogfile
;
56 extern int force_logfile
;
60 public char *tagoption
= NULL
;
64 extern int nm_fg_color
, nm_bg_color
;
65 extern int bo_fg_color
, bo_bg_color
;
66 extern int ul_fg_color
, ul_bg_color
;
67 extern int so_fg_color
, so_bg_color
;
68 extern int bl_fg_color
, bl_bg_color
;
74 * Handler for -o option.
85 error("log file support is not available", NULL_PARG
);
94 if (ch_getflags() & CH_CANSEEK
)
96 error("Input is not a pipe", NULL_PARG
);
101 error("Log file is already in use", NULL_PARG
);
105 namelogfile
= lglob(s
);
106 use_logfile(namelogfile
);
111 error("No log file", NULL_PARG
);
114 parg
.p_string
= namelogfile
;
115 error("Log file \"%s\"", &parg
);
122 * Handler for -O option.
129 force_logfile
= TRUE
;
135 * Handlers for -l option.
150 n
= getnum(&t
, "l", &err
);
153 error("Line number is required after -l", NULL_PARG
);
163 * Handlers for -j option.
182 jump_sline_fraction
= getfraction(&s
, "j", &err
);
184 error("Invalid line fraction", NULL_PARG
);
189 int sline
= getnum(&s
, "j", &err
);
191 error("Invalid line number", NULL_PARG
);
195 jump_sline_fraction
= -1;
200 if (jump_sline_fraction
< 0)
202 parg
.p_int
= jump_sline
;
203 error("Position target at screen line %d", &parg
);
207 sprintf(buf
, ".%06d", jump_sline_fraction
);
209 while (len
> 2 && buf
[len
-1] == '0')
213 error("Position target at screen position %s", &parg
);
222 if (jump_sline_fraction
< 0)
224 jump_sline
= sc_height
* jump_sline_fraction
/ NUM_FRAC_DENOM
;
228 * Handlers for -# option.
247 shift_count_fraction
= getfraction(&s
, "#", &err
);
249 error("Invalid column fraction", NULL_PARG
);
254 int hs
= getnum(&s
, "#", &err
);
256 error("Invalid column number", NULL_PARG
);
260 shift_count_fraction
= -1;
265 if (shift_count_fraction
< 0)
267 parg
.p_int
= shift_count
;
268 error("Horizontal shift %d columns", &parg
);
272 sprintf(buf
, ".%06d", shift_count_fraction
);
274 while (len
> 2 && buf
[len
-1] == '0')
278 error("Horizontal shift %s of screen width", &parg
);
286 if (shift_count_fraction
< 0)
288 shift_count
= sc_width
* shift_count_fraction
/ NUM_FRAC_DENOM
;
305 error("Cannot use lesskey file \"%s\"", &parg
);
314 * Handler for -t option.
328 /* Do the rest in main() */
333 error("tags support is not available", NULL_PARG
);
337 save_ifile
= save_curr_ifile();
339 * Try to open the file containing the tag
340 * and search for the tag in that file.
342 if (edit_tagfile() || (pos
= tagsearch()) == NULL_POSITION
)
344 /* Failed: reopen the old file. */
345 reedit_ifile(save_ifile
);
348 unsave_ifile(save_ifile
);
349 jump_loc(pos
, jump_sline
);
355 * Handler for -T option.
374 parg
.p_string
= tags
;
375 error("Tags file \"%s\"", &parg
);
382 * Handler for -p option.
393 * Unget a search command for the specified string.
394 * {{ This won't work if the "/" command is
395 * changed or invalidated by a .lesskey file. }}
400 * In "more" mode, the -p argument is a command,
401 * not a search string, so we don't need a slash.
410 * Handler for -P option.
417 register char **proto
;
425 * Figure out which prototype string should be changed.
429 case 's': proto
= &prproto
[PR_SHORT
]; s
++; break;
430 case 'm': proto
= &prproto
[PR_MEDIUM
]; s
++; break;
431 case 'M': proto
= &prproto
[PR_LONG
]; s
++; break;
432 case '=': proto
= &eqproto
; s
++; break;
433 case 'h': proto
= &hproto
; s
++; break;
434 case 'w': proto
= &wproto
; s
++; break;
435 default: proto
= &prproto
[PR_SHORT
]; break;
441 parg
.p_string
= prproto
[pr_type
];
448 * Handler for the -b option.
461 * Set the new number of buffers.
463 ch_setbufspace(bufspace
);
471 * Handler for the -i option.
491 * Handler for the -V option.
507 * Force output to stdout per GNU standard for --version output.
512 putstr("\nCopyright (C) 1984-2009 Mark Nudelman\n\n");
513 putstr("less comes with NO WARRANTY, to the extent permitted by law.\n");
514 putstr("For information about the terms of redistribution,\n");
515 putstr("see the file named README in the less distribution.\n");
516 putstr("Homepage: http://www.greenwoodsoftware.com/less\n");
524 * Parse an MSDOS color descriptor.
527 colordesc(s
, fg_color
, bg_color
)
535 fg
= getnum(&s
, "D", &err
);
538 error("Missing fg color in -D", NULL_PARG
);
546 bg
= getnum(&s
, "D", &err
);
549 error("Missing bg color in -D", NULL_PARG
);
554 error("Extra characters at end of -D option", NULL_PARG
);
560 * Handler for the -D option.
575 colordesc(s
, &nm_fg_color
, &nm_bg_color
);
578 colordesc(s
, &bo_fg_color
, &bo_bg_color
);
581 colordesc(s
, &ul_fg_color
, &ul_bg_color
);
584 colordesc(s
, &bl_fg_color
, &bl_bg_color
);
587 colordesc(s
, &so_fg_color
, &so_bg_color
);
590 error("-D must be followed by n, d, u, k or s", NULL_PARG
);
595 at_enter(AT_STANDOUT
);
606 * Handler for the -x option.
613 extern int tabstops
[];
614 extern int ntabstops
;
615 extern int tabdefault
;
616 char msg
[60+(4*TABSTOP_MAX
)];
624 /* Start at 1 because tabstops[0] is always zero. */
625 for (i
= 1; i
< TABSTOP_MAX
; )
629 while (*s
>= '0' && *s
<= '9')
630 n
= (10 * n
) + (*s
++ - '0');
631 if (n
> tabstops
[i
-1])
640 tabdefault
= tabstops
[ntabstops
-1] - tabstops
[ntabstops
-2];
643 strcpy(msg
, "Tab stops ");
646 for (i
= 1; i
< ntabstops
; i
++)
650 sprintf(msg
+strlen(msg
), "%d", tabstops
[i
]);
652 sprintf(msg
+strlen(msg
), " and then ");
654 sprintf(msg
+strlen(msg
), "every %d spaces",
664 * Handler for the -" option.
680 openquote
= closequote
= '\0';
683 if (s
[1] != '\0' && s
[2] != '\0')
685 error("-\" must be followed by 1 or 2 chars", NULL_PARG
);
690 closequote
= openquote
;
699 error("quotes %s", &parg
);
705 * "-?" means display a help message.
706 * If from the command line, exit immediately.
718 error("Use \"h\" for help", NULL_PARG
);
726 * Get the "screen window" size.
733 return (sc_height
+ swindow
);