opttbl.c revision 1.5 
1/*	$OpenBSD: opttbl.c,v 1.5 2001/11/19 19:02:14 mpech Exp $	*/
2
3/*
4 * Copyright (c) 1984,1985,1989,1994,1995  Mark Nudelman
5 * All rights reserved.
6 *
7 * Redistribution and use in source and binary forms, with or without
8 * modification, are permitted provided that the following conditions
9 * are met:
10 * 1. Redistributions of source code must retain the above copyright
11 *    notice, this list of conditions and the following disclaimer.
12 * 2. Redistributions in binary form must reproduce the above copyright
13 *    notice in the documentation and/or other materials provided with
14 *    the distribution.
15 *
16 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
17 * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
18 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
19 * PURPOSE ARE DISCLAIMED.  IN NO EVENT SHALL THE AUTHOR BE LIABLE
20 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
22 * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
23 * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
24 * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
25 * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
26 * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
27 */
28
29
30/*
31 * The option table.
32 */
33
34#include "less.h"
35#include "option.h"
36
37/*
38 * Variables controlled by command line options.
39 */
40public int quiet;		/* Should we suppress the audible bell? */
41public int how_search;		/* Where should forward searches start? */
42public int top_scroll;		/* Repaint screen from top?
43				   (alternative is scroll from bottom) */
44public int pr_type;		/* Type of prompt (short, medium, long) */
45public int bs_mode;		/* How to process backspaces */
46public int know_dumb;		/* Don't complain about dumb terminals */
47public int quit_at_eof;		/* Quit after hitting end of file twice */
48public int be_helpful;		/* more(1) style -d */
49public int squeeze;		/* Squeeze multiple blank lines into one */
50public int tabstop;		/* Tab settings */
51public int back_scroll;		/* Repaint screen on backwards movement */
52public int forw_scroll;		/* Repaint screen on forward movement */
53public int twiddle;		/* Display "~" for lines after EOF */
54public int caseless;		/* Do "caseless" searches */
55public int linenums;		/* Use line numbers */
56public int cbufs;		/* Current number of buffers */
57public int autobuf;		/* Automatically allocate buffers as needed */
58public int nohelp;		/* Disable the HELP command */
59public int ctldisp;		/* Send control chars to screen untranslated */
60public int force_open;		/* Open the file even if not regular file */
61public int swindow;		/* Size of scrolling window */
62public int jump_sline;		/* Screen line of "jump target" */
63public int chopline;		/* Truncate displayed lines at screen width */
64public int no_init;		/* Disable sending ti/te termcap strings */
65#if HILITE_SEARCH
66public int hilite_search;	/* Highlight matched search patterns? */
67#endif
68
69/*
70 * Table of all options and their semantics.
71 */
72static struct option option[] =
73{
74	{ 'a', BOOL, OPT_OFF, &how_search, NULL,
75		"Search includes displayed screen",
76		"Search skips displayed screen",
77		NULL
78	},
79	{ 'b', NUMBER, 10, &cbufs, opt_b,
80		"Buffers: ",
81		"%d buffers",
82		NULL
83	},
84	{ 'B', BOOL, OPT_ON, &autobuf, NULL,
85		"Don't automatically allocate buffers",
86		"Automatically allocate buffers when needed",
87		NULL
88	},
89	{ 'c', TRIPLE, OPT_OFF, &top_scroll, NULL,
90		"Repaint by scrolling from bottom of screen",
91		"Repaint by clearing each line",
92		"Repaint by painting from top of screen"
93	},
94#if 0
95	{ 'd', BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
96		"Assume intelligent terminal",
97		"Assume dumb terminal",
98		NULL
99	},
100#else
101	{ 'd', BOOL, OPT_OFF, &be_helpful, NULL,
102		"Be less helpful in prompts",
103		"Be helpful in prompts",
104		NULL,
105	},
106#endif
107#if MSOFTC
108	{ 'D', STRING|REPAINT, 0, NULL, opt_D,
109		"color desc: ", NULL, NULL
110	},
111#endif
112	{ 'e', TRIPLE, OPT_OFF, &quit_at_eof, NULL,
113		"Don't quit at end-of-file",
114		"Quit at end-of-file",
115		"Quit immediately at end-of-file"
116	},
117	{ 'f', BOOL, OPT_OFF, &force_open, NULL,
118		"Open only regular files",
119		"Open even non-regular files",
120		NULL
121	},
122#if HILITE_SEARCH
123	{ 'g', TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
124		"Don't highlight search matches",
125		"Highlight matches for previous search only",
126		"Highlight all matches for previous search pattern",
127	},
128#endif
129	{ 'h', NUMBER, -1, &back_scroll, NULL,
130		"Backwards scroll limit: ",
131		"Backwards scroll limit is %d lines",
132		NULL
133	},
134	{ 'H', BOOL|NO_TOGGLE, OPT_OFF, &nohelp, NULL,
135		"Allow help command",
136		"Don't allow help command",
137		NULL
138	},
139	{ 'i', TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i,
140		"Case is significant in searches",
141		"Ignore case in searches",
142		"Ignore case in searches and in patterns"
143	},
144	{ 'j', NUMBER, 1, &jump_sline, NULL,
145		"Target line: ",
146		"Position target at screen line %d",
147		NULL
148	},
149#if USERFILE
150	{ 'k', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k,
151		NULL, NULL, NULL
152	},
153#endif
154	{ 'l', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_l,
155		NULL, NULL, NULL
156	},
157	{ 'm', TRIPLE, OPT_OFF, &pr_type, NULL,
158		"Short prompt",
159		"Medium prompt",
160		"Long prompt"
161	},
162	{ 'n', TRIPLE|REPAINT, OPT_ON, &linenums, NULL,
163		"Don't use line numbers",
164		"Use line numbers",
165		"Constantly display line numbers"
166	},
167#if LOGFILE
168	{ 'o', STRING, 0, NULL, opt_o,
169		"log file: ", NULL, NULL
170	},
171	{ 'O', STRING, 0, NULL, opt__O,
172		"Log file: ", NULL, NULL
173	},
174#endif
175	{ 'p', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p,
176		NULL, NULL, NULL
177	},
178	{ 'P', STRING, 0, NULL, opt__P,
179		"prompt: ", NULL, NULL
180	},
181	{ 'q', TRIPLE, OPT_OFF, &quiet, NULL,
182		"Ring the bell for errors AND at eof/bof",
183		"Ring the bell for errors but not at eof/bof",
184		"Never ring the bell"
185	},
186	{ 'r', BOOL|REPAINT, OPT_ON, &ctldisp, NULL,
187		"Display control characters directly",
188		"Display control characters as ^X",
189		NULL
190	},
191	{ 's', BOOL|REPAINT, OPT_OFF, &squeeze, NULL,
192		"Display all blank lines",
193		"Squeeze multiple blank lines",
194		NULL
195	},
196	{ 'S', BOOL|REPAINT, OPT_OFF, &chopline, NULL,
197		"Fold long lines",
198		"Chop long lines",
199		NULL
200	},
201#if TAGS
202	{ 't', STRING|NO_QUERY, 0, NULL, opt_t,
203		"tag: ", NULL, NULL
204	},
205	{ 'T', STRING, 0, NULL, opt__T,
206		"tags file: ", NULL, NULL
207	},
208#endif
209	{ 'u', TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL,
210		"Display underlined text in underline mode",
211		"Backspaces cause overstrike",
212		"Print backspace as ^H"
213	},
214	{ 'V', NOVAR, 0, NULL, opt__V,
215		NULL, NULL, NULL
216	},
217	{ 'w', BOOL|REPAINT, OPT_ON, &twiddle, NULL,
218		"Display nothing for lines after end-of-file",
219		"Display ~ for lines after end-of-file",
220		NULL
221	},
222	{ 'x', NUMBER|REPAINT, 8, &tabstop, NULL,
223		"Tab stops: ",
224		"Tab stops every %d spaces",
225		NULL
226	},
227	{ 'X', BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL,
228		"Send init/deinit strings to terminal",
229		"Don't use init/deinit strings",
230		NULL
231	},
232	{ 'y', NUMBER, -1, &forw_scroll, NULL,
233		"Forward scroll limit: ",
234		"Forward scroll limit is %d lines",
235		NULL
236	},
237	{ 'z', NUMBER, -1, &swindow, NULL,
238		"Scroll window size: ",
239		"Scroll window size is %d lines",
240		NULL
241	},
242	{ '?', NOVAR, 0, NULL, opt_query,
243		NULL, NULL, NULL
244	},
245	{ '\0' }
246};
247
248
249/*
250 * Initialize each option to its default value.
251 */
252	public void
253init_option()
254{
255	struct option *o;
256
257	for (o = option;  o->oletter != '\0';  o++)
258	{
259		/*
260		 * Set each variable to its default.
261		 */
262		if (o->ovar != NULL)
263			*(o->ovar) = o->odefault;
264	}
265}
266
267/*
268 * Find an option in the option table.
269 */
270	public struct option *
271findopt(c)
272	int c;
273{
274	struct option *o;
275
276	for (o = option;  o->oletter != '\0';  o++)
277	{
278		if (o->oletter == c)
279			return (o);
280		if ((o->otype & TRIPLE) && toupper(o->oletter) == c)
281			return (o);
282	}
283	return (NULL);
284}
285