2 * Copyright (C) 1984-2002 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
;
39 extern int any_display
;
40 extern char openquote
;
41 extern char closequote
;
42 extern char *prproto
[];
46 extern IFILE curr_ifile
;
47 extern char version
[];
49 extern char *namelogfile
;
50 extern int force_logfile
;
54 public char *tagoption
= NULL
;
56 extern int jump_sline
;
59 extern int nm_fg_color
, nm_bg_color
;
60 extern int bo_fg_color
, bo_bg_color
;
61 extern int ul_fg_color
, ul_bg_color
;
62 extern int so_fg_color
, so_bg_color
;
63 extern int bl_fg_color
, bl_bg_color
;
69 * Handler for -o option.
80 error("log file support is not available", NULL_PARG
);
89 if (ch_getflags() & CH_CANSEEK
)
91 error("Input is not a pipe", NULL_PARG
);
96 error("Log file is already in use", NULL_PARG
);
100 namelogfile
= lglob(s
);
101 use_logfile(namelogfile
);
106 error("No log file", NULL_PARG
);
109 parg
.p_string
= namelogfile
;
110 error("Log file \"%s\"", &parg
);
117 * Handler for -O option.
124 force_logfile
= TRUE
;
130 * Handlers for -l option.
145 n
= getnum(&t
, "l", &err
);
148 error("Line number is required after -l", NULL_PARG
);
171 error("Cannot use lesskey file \"%s\"", &parg
);
180 * Handler for -t option.
194 /* Do the rest in main() */
199 error("tags support is not available", NULL_PARG
);
203 save_ifile
= save_curr_ifile();
206 if ((pos
= tagsearch()) == NULL_POSITION
)
208 reedit_ifile(save_ifile
);
211 unsave_ifile(save_ifile
);
212 jump_loc(pos
, jump_sline
);
218 * Handler for -T option.
237 parg
.p_string
= tags
;
238 error("Tags file \"%s\"", &parg
);
245 * Handler for -p option.
256 * Unget a search command for the specified string.
257 * {{ This won't work if the "/" command is
258 * changed or invalidated by a .lesskey file. }}
268 * Handler for -P option.
275 register char **proto
;
283 * Figure out which prototype string should be changed.
287 case 's': proto
= &prproto
[PR_SHORT
]; s
++; break;
288 case 'm': proto
= &prproto
[PR_MEDIUM
]; s
++; break;
289 case 'M': proto
= &prproto
[PR_LONG
]; s
++; break;
290 case '=': proto
= &eqproto
; s
++; break;
291 case 'h': proto
= &hproto
; s
++; break;
292 case 'w': proto
= &wproto
; s
++; break;
293 default: proto
= &prproto
[PR_SHORT
]; break;
299 parg
.p_string
= prproto
[pr_type
];
306 * Handler for the -b option.
319 * Set the new number of buffers.
321 ch_setbufspace(bufspace
);
329 * Handler for the -i option.
349 * Handler for the -V option.
365 * Force output to stdout per GNU standard for --version output.
370 putstr("\nCopyright (C) 2002 Mark Nudelman\n\n");
371 putstr("less comes with NO WARRANTY, to the extent permitted by law.\n");
372 putstr("For information about the terms of redistribution,\n");
373 putstr("see the file named README in the less distribution.\n");
374 putstr("Homepage: http://www.greenwoodsoftware.com/less\n");
382 * Parse an MSDOS color descriptor.
385 colordesc(s
, fg_color
, bg_color
)
393 fg
= getnum(&s
, "D", &err
);
396 error("Missing fg color in -D", NULL_PARG
);
404 bg
= getnum(&s
, "D", &err
);
407 error("Missing fg color in -D", NULL_PARG
);
412 error("Extra characters at end of -D option", NULL_PARG
);
418 * Handler for the -D option.
433 colordesc(s
, &nm_fg_color
, &nm_bg_color
);
436 colordesc(s
, &bo_fg_color
, &bo_bg_color
);
439 colordesc(s
, &ul_fg_color
, &ul_bg_color
);
442 colordesc(s
, &bl_fg_color
, &bl_bg_color
);
445 colordesc(s
, &so_fg_color
, &so_bg_color
);
448 error("-D must be followed by n, d, u, k or s", NULL_PARG
);
464 * Handler for the -x option.
471 extern int tabstops
[];
472 extern int ntabstops
;
473 extern int tabdefault
;
474 char msg
[60+(4*TABSTOP_MAX
)];
482 /* Start at 1 because tabstops[0] is always zero. */
483 for (i
= 1; i
< TABSTOP_MAX
; )
487 while (*s
>= '0' && *s
<= '9')
488 n
= (10 * n
) + (*s
++ - '0');
489 if (n
> tabstops
[i
-1])
498 tabdefault
= tabstops
[ntabstops
-1] - tabstops
[ntabstops
-2];
501 strcpy(msg
, "Tab stops ");
504 for (i
= 1; i
< ntabstops
; i
++)
508 sprintf(msg
+strlen(msg
), "%d", tabstops
[i
]);
510 sprintf(msg
+strlen(msg
), " and then ");
512 sprintf(msg
+strlen(msg
), "every %d spaces",
522 * Handler for the -" option.
538 openquote
= closequote
= '\0';
541 if (s
[1] != '\0' && s
[2] != '\0')
543 error("-\" must be followed by 1 or 2 chars", NULL_PARG
);
548 closequote
= openquote
;
557 error("quotes %s", &parg
);
563 * "-?" means display a help message.
564 * If from the command line, exit immediately.
576 error("Use \"h\" for help", NULL_PARG
);
584 * Get the "screen window" size.
591 return (sc_height
+ swindow
);