Annotation of src/usr.bin/less/opttbl.c, Revision 1.1.1.1
1.1 etheisen 1: /*
2: * Copyright (c) 1984,1985,1989,1994,1995 Mark Nudelman
3: * All rights reserved.
4: *
5: * Redistribution and use in source and binary forms, with or without
6: * modification, are permitted provided that the following conditions
7: * are met:
8: * 1. Redistributions of source code must retain the above copyright
9: * notice, this list of conditions and the following disclaimer.
10: * 2. Redistributions in binary form must reproduce the above copyright
11: * notice in the documentation and/or other materials provided with
12: * the distribution.
13: *
14: * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY
15: * EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
16: * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
17: * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR BE LIABLE
18: * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
19: * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT
20: * OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR
21: * BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
22: * WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE
23: * OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN
24: * IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
25: */
26:
27:
28: /*
29: * The option table.
30: */
31:
32: #include "less.h"
33: #include "option.h"
34:
35: /*
36: * Variables controlled by command line options.
37: */
38: public int quiet; /* Should we suppress the audible bell? */
39: public int how_search; /* Where should forward searches start? */
40: public int top_scroll; /* Repaint screen from top?
41: (alternative is scroll from bottom) */
42: public int pr_type; /* Type of prompt (short, medium, long) */
43: public int bs_mode; /* How to process backspaces */
44: public int know_dumb; /* Don't complain about dumb terminals */
45: public int quit_at_eof; /* Quit after hitting end of file twice */
46: public int squeeze; /* Squeeze multiple blank lines into one */
47: public int tabstop; /* Tab settings */
48: public int back_scroll; /* Repaint screen on backwards movement */
49: public int forw_scroll; /* Repaint screen on forward movement */
50: public int twiddle; /* Display "~" for lines after EOF */
51: public int caseless; /* Do "caseless" searches */
52: public int linenums; /* Use line numbers */
53: public int cbufs; /* Current number of buffers */
54: public int autobuf; /* Automatically allocate buffers as needed */
55: public int nohelp; /* Disable the HELP command */
56: public int ctldisp; /* Send control chars to screen untranslated */
57: public int force_open; /* Open the file even if not regular file */
58: public int swindow; /* Size of scrolling window */
59: public int jump_sline; /* Screen line of "jump target" */
60: public int chopline; /* Truncate displayed lines at screen width */
61: public int no_init; /* Disable sending ti/te termcap strings */
62: #if HILITE_SEARCH
63: public int hilite_search; /* Highlight matched search patterns? */
64: #endif
65:
66: /*
67: * Table of all options and their semantics.
68: */
69: static struct option option[] =
70: {
71: { 'a', BOOL, OPT_OFF, &how_search, NULL,
72: "Search includes displayed screen",
73: "Search skips displayed screen",
74: NULL
75: },
76: { 'b', NUMBER, 10, &cbufs, opt_b,
77: "Buffers: ",
78: "%d buffers",
79: NULL
80: },
81: { 'B', BOOL, OPT_ON, &autobuf, NULL,
82: "Don't automatically allocate buffers",
83: "Automatically allocate buffers when needed",
84: NULL
85: },
86: { 'c', TRIPLE, OPT_OFF, &top_scroll, NULL,
87: "Repaint by scrolling from bottom of screen",
88: "Repaint by clearing each line",
89: "Repaint by painting from top of screen"
90: },
91: { 'd', BOOL|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
92: "Assume intelligent terminal",
93: "Assume dumb terminal",
94: NULL
95: },
96: #if MSOFTC
97: { 'D', STRING|REPAINT, 0, NULL, opt_D,
98: "color desc: ", NULL, NULL
99: },
100: #endif
101: { 'e', TRIPLE, OPT_OFF, &quit_at_eof, NULL,
102: "Don't quit at end-of-file",
103: "Quit at end-of-file",
104: "Quit immediately at end-of-file"
105: },
106: { 'f', BOOL, OPT_OFF, &force_open, NULL,
107: "Open only regular files",
108: "Open even non-regular files",
109: NULL
110: },
111: #if HILITE_SEARCH
112: { 'g', TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
113: "Don't highlight search matches",
114: "Highlight matches for previous search only",
115: "Highlight all matches for previous search pattern",
116: },
117: #endif
118: { 'h', NUMBER, -1, &back_scroll, NULL,
119: "Backwards scroll limit: ",
120: "Backwards scroll limit is %d lines",
121: NULL
122: },
123: { 'H', BOOL|NO_TOGGLE, OPT_OFF, &nohelp, NULL,
124: "Allow help command",
125: "Don't allow help command",
126: NULL
127: },
128: { 'i', TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i,
129: "Case is significant in searches",
130: "Ignore case in searches",
131: "Ignore case in searches and in patterns"
132: },
133: { 'j', NUMBER, 1, &jump_sline, NULL,
134: "Target line: ",
135: "Position target at screen line %d",
136: NULL
137: },
138: #if USERFILE
139: { 'k', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k,
140: NULL, NULL, NULL
141: },
142: #endif
143: { 'l', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_l,
144: NULL, NULL, NULL
145: },
146: { 'm', TRIPLE, OPT_OFF, &pr_type, NULL,
147: "Short prompt",
148: "Medium prompt",
149: "Long prompt"
150: },
151: { 'n', TRIPLE|REPAINT, OPT_ON, &linenums, NULL,
152: "Don't use line numbers",
153: "Use line numbers",
154: "Constantly display line numbers"
155: },
156: #if LOGFILE
157: { 'o', STRING, 0, NULL, opt_o,
158: "log file: ", NULL, NULL
159: },
160: { 'O', STRING, 0, NULL, opt__O,
161: "Log file: ", NULL, NULL
162: },
163: #endif
164: { 'p', STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_p,
165: NULL, NULL, NULL
166: },
167: { 'P', STRING, 0, NULL, opt__P,
168: "prompt: ", NULL, NULL
169: },
170: { 'q', TRIPLE, OPT_OFF, &quiet, NULL,
171: "Ring the bell for errors AND at eof/bof",
172: "Ring the bell for errors but not at eof/bof",
173: "Never ring the bell"
174: },
175: { 'r', BOOL|REPAINT, OPT_ON, &ctldisp, NULL,
176: "Display control characters directly",
177: "Display control characters as ^X",
178: NULL
179: },
180: { 's', BOOL|REPAINT, OPT_OFF, &squeeze, NULL,
181: "Display all blank lines",
182: "Squeeze multiple blank lines",
183: NULL
184: },
185: { 'S', BOOL|REPAINT, OPT_OFF, &chopline, NULL,
186: "Fold long lines",
187: "Chop long lines",
188: NULL
189: },
190: #if TAGS
191: { 't', STRING|NO_QUERY, 0, NULL, opt_t,
192: "tag: ", NULL, NULL
193: },
194: { 'T', STRING, 0, NULL, opt__T,
195: "tags file: ", NULL, NULL
196: },
197: #endif
198: { 'u', TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL,
199: "Display underlined text in underline mode",
200: "Backspaces cause overstrike",
201: "Print backspace as ^H"
202: },
203: { 'V', NOVAR, 0, NULL, opt__V,
204: NULL, NULL, NULL
205: },
206: { 'w', BOOL|REPAINT, OPT_ON, &twiddle, NULL,
207: "Display nothing for lines after end-of-file",
208: "Display ~ for lines after end-of-file",
209: NULL
210: },
211: { 'x', NUMBER|REPAINT, 8, &tabstop, NULL,
212: "Tab stops: ",
213: "Tab stops every %d spaces",
214: NULL
215: },
216: { 'X', BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL,
217: "Send init/deinit strings to terminal",
218: "Don't use init/deinit strings",
219: NULL
220: },
221: { 'y', NUMBER, -1, &forw_scroll, NULL,
222: "Forward scroll limit: ",
223: "Forward scroll limit is %d lines",
224: NULL
225: },
226: { 'z', NUMBER, -1, &swindow, NULL,
227: "Scroll window size: ",
228: "Scroll window size is %d lines",
229: NULL
230: },
231: { '?', NOVAR, 0, NULL, opt_query,
232: NULL, NULL, NULL
233: },
234: { '\0' }
235: };
236:
237:
238: /*
239: * Initialize each option to its default value.
240: */
241: public void
242: init_option()
243: {
244: register struct option *o;
245:
246: for (o = option; o->oletter != '\0'; o++)
247: {
248: /*
249: * Set each variable to its default.
250: */
251: if (o->ovar != NULL)
252: *(o->ovar) = o->odefault;
253: }
254: }
255:
256: /*
257: * Find an option in the option table.
258: */
259: public struct option *
260: findopt(c)
261: int c;
262: {
263: register struct option *o;
264:
265: for (o = option; o->oletter != '\0'; o++)
266: {
267: if (o->oletter == c)
268: return (o);
269: if ((o->otype & TRIPLE) && toupper(o->oletter) == c)
270: return (o);
271: }
272: return (NULL);
273: }
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