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GCC Code Coverage Report

Directory:	./		Exec	Total	Coverage
File:	usr.bin/less/less/../opttbl.c	Lines:	6	34	17.6 %
Date:	2017-11-13	Branches:	6	46	13.0 %


/*
 * Copyright (C) 1984-2012  Mark Nudelman
 * Modified for use with illumos by Garrett D'Amore.
 * Copyright 2014 Garrett D'Amore <garrett@damore.org>
 *
 * You may distribute under the terms of either the GNU General Public
 * License or the Less License, as specified in the README file.
 *
 * For more information, see the README file.
 */

/*
 * The option table.
 */

#include "less.h"
#include "option.h"

/*
 * Variables controlled by command line options.
 */
int quiet;		/* Should we suppress the audible bell? */
int how_search;		/* Where should forward searches start? */
int top_scroll;		/* Repaint screen from top? (vs scroll from bottom) */
int pr_type;		/* Type of prompt (short, medium, long) */
int bs_mode;		/* How to process backspaces */
int know_dumb;		/* Don't complain about dumb terminals */
int quit_at_eof;	/* Quit after hitting end of file twice */
int quit_if_one_screen;	/* Quit if EOF on first screen */
int squeeze;		/* Squeeze multiple blank lines into one */
int back_scroll;	/* Repaint screen on backwards movement */
int forw_scroll;	/* Repaint screen on forward movement */
int caseless;		/* Do "caseless" searches */
int linenums;		/* Use line numbers */
int autobuf;		/* Automatically allocate buffers as needed */
int bufspace;		/* Max buffer space per file (K) */
int ctldisp;		/* Send control chars to screen untranslated */
int force_open;		/* Open the file even if not regular file */
int swindow;		/* Size of scrolling window */
int jump_sline;		/* Screen line of "jump target" */
long jump_sline_fraction = -1;
int chopline;		/* Truncate displayed lines at screen width */
int no_init;		/* Disable sending ti/te termcap strings */
int no_keypad;		/* Disable sending ks/ke termcap strings */
int twiddle;		/* Show tildes after EOF */
int show_attn;		/* Hilite first unread line */
int status_col;		/* Display a status column */
int use_lessopen;	/* Use the LESSOPEN filter */
int quit_on_intr;	/* Quit on interrupt */
int follow_mode;	/* F cmd Follows file desc or file name? */
int oldbot;		/* Old bottom of screen behavior {{REMOVE}} */
int opt_use_backslash;	/* Use backslash escaping in option parsing */
int hilite_search;	/* Highlight matched search patterns? */

int less_is_more = 0;	/* Make compatible with POSIX more */

/*
 * Long option names.
 */
static struct optname a_optname		= { "search-skip-screen",	NULL };
static struct optname b_optname		= { "buffers",			NULL };
static struct optname B__optname	= { "auto-buffers",		NULL };
static struct optname c_optname		= { "clear-screen",		NULL };
static struct optname d_optname		= { "dumb",			NULL };
static struct optname e_optname		= { "quit-at-eof",		NULL };
static struct optname f_optname		= { "force",			NULL };
static struct optname F__optname	= { "quit-if-one-screen",	NULL };
static struct optname g_optname		= { "hilite-search",		NULL };
static struct optname h_optname		= { "max-back-scroll",		NULL };
static struct optname i_optname		= { "ignore-case",		NULL };
static struct optname j_optname		= { "jump-target",		NULL };
static struct optname J__optname	= { "status-column",		NULL };
static struct optname k_optname		= { "lesskey-file",		NULL };
static struct optname K__optname	= { "quit-on-intr",		NULL };
static struct optname L__optname	= { "no-lessopen",		NULL };
static struct optname m_optname		= { "long-prompt",		NULL };
static struct optname n_optname		= { "line-numbers",		NULL };
static struct optname o_optname		= { "log-file",			NULL };
static struct optname O__optname	= { "LOG-FILE",			NULL };
static struct optname p_optname		= { "pattern",			NULL };
static struct optname P__optname	= { "prompt",			NULL };
static struct optname q2_optname	= { "silent",			NULL };
static struct optname q_optname		= { "quiet",		&q2_optname };
static struct optname r_optname		= { "raw-control-chars",	NULL };
static struct optname s_optname		= { "squeeze-blank-lines",	NULL };
static struct optname S__optname	= { "chop-long-lines",		NULL };
static struct optname t_optname		= { "tag",			NULL };
static struct optname T__optname	= { "tag-file",			NULL };
static struct optname u_optname		= { "underline-special",	NULL };
static struct optname V__optname	= { "version",			NULL };
static struct optname w_optname		= { "hilite-unread",		NULL };
static struct optname x_optname		= { "tabs",			NULL };
static struct optname X__optname	= { "no-init",			NULL };
static struct optname y_optname		= { "max-forw-scroll",		NULL };
static struct optname z_optname		= { "window",			NULL };
static struct optname quote_optname	= { "quotes",			NULL };
static struct optname tilde_optname	= { "tilde",			NULL };
static struct optname query_optname	= { "help",			NULL };
static struct optname pound_optname	= { "shift",			NULL };
static struct optname keypad_optname	= { "no-keypad",		NULL };
static struct optname oldbot_optname	= { "old-bot",			NULL };
static struct optname follow_optname	= { "follow-name",		NULL };
static struct optname use_backslash_optname = { "use-backslash",	NULL };


/*
 * Table of all options and their semantics.
 *
 * For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are
 * the description of the option when set to 0, 1 or 2, respectively.
 * For NUMBER options, odesc[0] is the prompt to use when entering
 * a new value, and odesc[1] is the description, which should contain
 * one %d which is replaced by the value of the number.
 * For STRING options, odesc[0] is the prompt to use when entering
 * a new value, and odesc[1], if not NULL, is the set of characters
 * that are valid in the string.
 */
static struct loption option[] = {
	{ 'a', &a_optname,
		TRIPLE, OPT_ONPLUS, &how_search, NULL,
		{
			"Search includes displayed screen",
			"Search skips displayed screen",
			"Search includes all of displayed screen"
		}
	},

	{ 'b', &b_optname,
		NUMBER|INIT_HANDLER, 64, &bufspace, opt_b,
		{
			"Max buffer space per file (K): ",
			"Max buffer space per file: %dK",
			NULL
		}
	},
	{ 'B', &B__optname,
		BOOL, OPT_ON, &autobuf, NULL,
		{
			"Don't automatically allocate buffers",
			"Automatically allocate buffers when needed",
			NULL
		}
	},
	{ 'c', &c_optname,
		TRIPLE|MORE_OK, OPT_ON, &top_scroll, NULL,
		{
			"Repaint by scrolling from bottom of screen",
			"Repaint by painting from top of screen",
			"Repaint by painting from top of screen"
		}
	},
	{ 'd', &d_optname,
		BOOL|MORE_OK|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
		{
			"Assume intelligent terminal",
			"Assume dumb terminal",
			NULL
		}
	},
	{ 'e', &e_optname,
		TRIPLE, OPT_OFF, &quit_at_eof, NULL,
		{
			"Don't quit at end-of-file",
			"Quit at end-of-file",
			"Quit immediately at end-of-file"
		}
	},
	{ 'f', &f_optname,
		BOOL, OPT_OFF, &force_open, NULL,
		{
			"Open only regular files",
			"Open even non-regular files",
			NULL
		}
	},
	{ 'F', &F__optname,
		BOOL, OPT_OFF, &quit_if_one_screen, NULL,
		{
			"Don't quit if end-of-file on first screen",
			"Quit if end-of-file on first screen",
			NULL
		}
	},
	{ 'g', &g_optname,
		TRIPLE|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
		{
			"Don't highlight search matches",
			"Highlight matches for previous search only",
			"Highlight all matches for previous search pattern",
		}
	},
	{ 'h', &h_optname,
		NUMBER, -1, &back_scroll, NULL,
		{
			"Backwards scroll limit: ",
			"Backwards scroll limit is %d lines",
			NULL
		}
	},
	{ 'i', &i_optname,
		TRIPLE|HL_REPAINT, OPT_OFF, &caseless, opt_i,
		{
			"Case is significant in searches",
			"Ignore case in searches",
			"Ignore case in searches and in patterns"
		}
	},
	{ 'j', &j_optname,
		STRING, 0, NULL, opt_j,
		{
			"Target line: ",
			"0123456789.-",
			NULL
		}
	},
	{ 'J', &J__optname,
		BOOL|REPAINT, OPT_OFF, &status_col, NULL,
		{
			"Don't display a status column",
			"Display a status column",
			NULL
		}
	},
	{ 'k', &k_optname,
		STRING|NO_TOGGLE|NO_QUERY, 0, NULL, opt_k,
		{ NULL, NULL, NULL }
	},
	{ 'K', &K__optname,
		BOOL, OPT_OFF, &quit_on_intr, NULL,
		{
			"Interrupt (ctrl-C) returns to prompt",
			"Interrupt (ctrl-C) exits less",
			NULL
		}
	},
	{ 'L', &L__optname,
		BOOL, OPT_ON, &use_lessopen, NULL,
		{
			"Don't use the LESSOPEN filter",
			"Use the LESSOPEN filter",
			NULL
		}
	},
	{ 'm', &m_optname,
		TRIPLE, OPT_OFF, &pr_type, NULL,
		{
			"Short prompt",
			"Medium prompt",
			"Long prompt"
		}
	},
	{ 'n', &n_optname,
		TRIPLE|REPAINT, OPT_ON, &linenums, NULL,
		{
			"Don't use line numbers",
			"Use line numbers",
			"Constantly display line numbers"
		}
	},
	{ 'o', &o_optname,
		STRING, 0, NULL, opt_o,
		{ "log file: ", NULL, NULL }
	},
	{ 'O', &O__optname,
		STRING, 0, NULL, opt__O,
		{ "Log file: ", NULL, NULL }
	},
	{ 'p', &p_optname,
		STRING|NO_TOGGLE|NO_QUERY|MORE_OK, 0, NULL, opt_p,
		{ NULL, NULL, NULL }
	},
	{ 'P', &P__optname,
		STRING, 0, NULL, opt__P,
		{ "prompt: ", NULL, NULL }
	},
	{ 'q', &q_optname,
		TRIPLE, OPT_OFF, &quiet, NULL,
		{
			"Ring the bell for errors AND at eof/bof",
			"Ring the bell for errors but not at eof/bof",
			"Never ring the bell"
		}
	},
	{ 'r', &r_optname,
		TRIPLE|REPAINT, OPT_OFF, &ctldisp, NULL,
		{
			"Display control characters as ^X",
			"Display control characters directly",
			"Display control characters directly, "
			"processing ANSI sequences"
		}
	},
	{ 's', &s_optname,
		BOOL|REPAINT|MORE_OK, OPT_OFF, &squeeze, NULL,
		{
			"Display all blank lines",
			"Squeeze multiple blank lines",
			NULL
		}
	},
	{ 'S', &S__optname,
		BOOL|REPAINT, OPT_OFF, &chopline, NULL,
		{
			"Fold long lines",
			"Chop long lines",
			NULL
		}
	},
	{ 't', &t_optname,
		STRING|NO_QUERY|MORE_OK, 0, NULL, opt_t,
		{ "tag: ", NULL, NULL }
	},
	{ 'T', &T__optname,
		STRING|MORE_OK, 0, NULL, opt__T,
		{ "tags file: ", NULL, NULL }
	},
	{ 'u', &u_optname,
		TRIPLE|REPAINT, OPT_OFF, &bs_mode, NULL,
		{
			"Display underlined text in underline mode",
			"Backspaces cause overstrike",
			"Print backspace as ^H"
		}
	},
	{ 'V', &V__optname,
		NOVAR, 0, NULL, opt__V,
		{ NULL, NULL, NULL }
	},
	{ 'w', &w_optname,
		TRIPLE|REPAINT, OPT_OFF, &show_attn, NULL,
		{
			"Don't highlight first unread line",
			"Highlight first unread line after forward-screen",
			"Highlight first unread line after any "
			"forward movement",
		}
	},
	{ 'x', &x_optname,
		STRING|REPAINT, 0, NULL, opt_x,
		{
			"Tab stops: ",
			"0123456789,",
			NULL
		}
	},
	{ 'X', &X__optname,
		BOOL|NO_TOGGLE, OPT_OFF, &no_init, NULL,
		{
			"Send init/deinit strings to terminal",
			"Don't use init/deinit strings",
			NULL
		}
	},
	{ 'y', &y_optname,
		NUMBER, -1, &forw_scroll, NULL,
		{
			"Forward scroll limit: ",
			"Forward scroll limit is %d lines",
			NULL
		}
	},
	{ 'z', &z_optname,
		NUMBER, -1, &swindow, NULL,
		{
			"Scroll window size: ",
			"Scroll window size is %d lines",
			NULL
		}
	},
	{ '"', &quote_optname,
		STRING, 0, NULL, opt_quote,
		{ "quotes: ", NULL, NULL }
	},
	{ '~', &tilde_optname,
		BOOL|REPAINT, OPT_ON, &twiddle, NULL,
		{
			"Don't show tildes after end of file",
			"Show tildes after end of file",
			NULL
		}
	},
	{ '?', &query_optname,
		NOVAR, 0, NULL, opt_query,
		{ NULL, NULL, NULL }
	},
	{ '#', &pound_optname,
		STRING, 0, NULL, opt_shift,
		{
			"Horizontal shift: ",
			"0123456789.",
			NULL
		}
	},
	{ OLETTER_NONE, &keypad_optname,
		BOOL|NO_TOGGLE, OPT_OFF, &no_keypad, NULL,
		{
			"Use keypad mode",
			"Don't use keypad mode",
			NULL
		}
	},
	{ OLETTER_NONE, &oldbot_optname,
		BOOL, OPT_OFF, &oldbot, NULL,
		{
			"Use new bottom of screen behavior",
			"Use old bottom of screen behavior",
			NULL
		}
	},
	{ OLETTER_NONE, &follow_optname,
		BOOL, FOLLOW_DESC, &follow_mode, NULL,
		{
			"F command follows file descriptor",
			"F command follows file name",
			NULL
		}
	},
	{ OLETTER_NONE, &use_backslash_optname,
		BOOL, OPT_OFF, &opt_use_backslash, NULL,
		{
			"Use backslash escaping in command line parameters",
			"Don't use backslash escaping in command line "
			"parameters",
			NULL
		}
	},
	{ '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } }
};


/*
 * Initialize each option to its default value.
 */
void
init_option(void)
{
	struct loption *o;

	for (o = option; o->oletter != '\0'; o++) {
		/*
		 * Set each variable to its default.
		 */
		if (o->ovar != NULL)
			*(o->ovar) = o->odefault;
		if (o->otype & INIT_HANDLER)
			(*(o->ofunc))(INIT, NULL);
	}
}

/*
 * Find an option in the option table, given its option letter.
 */
struct loption *
findopt(int c)
{
	struct loption *o;

	for (o = option; o->oletter != '\0'; o++) {
		if (o->oletter == c)
			return (o);
		if ((o->otype & TRIPLE) &&
		    (toupper((unsigned char)o->oletter) == c))
			return (o);
	}
	return (NULL);
}

/*
 *
 */
static int
is_optchar(unsigned char c)
{
	if (isupper(c) || islower(c) || c == '-')
		return (1);
	else
		return (0);
}

/*
 * Find an option in the option table, given its option name.
 * p_optname is the (possibly partial) name to look for, and
 * is updated to point after the matched name.
 * p_oname if non-NULL is set to point to the full option name.
 */
struct loption *
findopt_name(char **p_optname, char **p_oname, int *p_err)
{
	char *optname = *p_optname;
	struct loption *o;
	struct optname *oname;
	int len;
	int uppercase;
	struct loption *maxo = NULL;
	struct optname *maxoname = NULL;
	int maxlen = 0;
	int ambig = 0;
	int exact = 0;

	/*
	 * Check all options.
	 */
	for (o = option; o->oletter != '\0'; o++) {
		/*
		 * Check all names for this option.
		 */
		for (oname = o->onames; oname != NULL; oname = oname->onext) {
			/*
			 * Try normal match first (uppercase == 0),
			 * then, then if it's a TRIPLE option,
			 * try uppercase match (uppercase == 1).
			 */
			for (uppercase = 0; uppercase <= 1; uppercase++) {
				len = sprefix(optname, oname->oname, uppercase);
				if (len <= 0 || is_optchar(optname[len])) {
					/*
					 * We didn't use all of the option name.
					 */
					continue;
				}
				if (!exact && len == maxlen) {
					/*
					 * Already had a partial match,
					 * and now there's another one that
					 * matches the same length.
					 */
					ambig = 1;
				} else if (len > maxlen) {
					/*
					 * Found a better match than
					 * the one we had.
					 */
					maxo = o;
					maxoname = oname;
					maxlen = len;
					ambig = 0;
					exact = (len == strlen(oname->oname));
				}
				if (!(o->otype & TRIPLE))
					break;
			}
		}
	}
	if (ambig) {
		/*
		 * Name matched more than one option.
		 */
		if (p_err != NULL)
			*p_err = OPT_AMBIG;
		return (NULL);
	}
	*p_optname = optname + maxlen;
	if (p_oname != NULL)
		*p_oname = maxoname == NULL ? NULL : maxoname->oname;
	return (maxo);
}


Generated by: GCOVR (Version 3.3)

Line	Branch	Exec	Source
1			/*
2			* Copyright (C) 1984-2012 Mark Nudelman
3			* Modified for use with illumos by Garrett D'Amore.
4			* Copyright 2014 Garrett D'Amore <garrett@damore.org>
5			*
6			* You may distribute under the terms of either the GNU General Public
7			* License or the Less License, as specified in the README file.
8			*
9			* For more information, see the README file.
10			*/
11
12			/*
13			* The option table.
14			*/
15
16			#include "less.h"
17			#include "option.h"
18
19			/*
20			* Variables controlled by command line options.
21			*/
22			int quiet; /* Should we suppress the audible bell? */
23			int how_search; /* Where should forward searches start? */
24			int top_scroll; /* Repaint screen from top? (vs scroll from bottom) */
25			int pr_type; /* Type of prompt (short, medium, long) */
26			int bs_mode; /* How to process backspaces */
27			int know_dumb; /* Don't complain about dumb terminals */
28			int quit_at_eof; /* Quit after hitting end of file twice */
29			int quit_if_one_screen; /* Quit if EOF on first screen */
30			int squeeze; /* Squeeze multiple blank lines into one */
31			int back_scroll; /* Repaint screen on backwards movement */
32			int forw_scroll; /* Repaint screen on forward movement */
33			int caseless; /* Do "caseless" searches */
34			int linenums; /* Use line numbers */
35			int autobuf; /* Automatically allocate buffers as needed */
36			int bufspace; /* Max buffer space per file (K) */
37			int ctldisp; /* Send control chars to screen untranslated */
38			int force_open; /* Open the file even if not regular file */
39			int swindow; /* Size of scrolling window */
40			int jump_sline; /* Screen line of "jump target" */
41			long jump_sline_fraction = -1;
42			int chopline; /* Truncate displayed lines at screen width */
43			int no_init; /* Disable sending ti/te termcap strings */
44			int no_keypad; /* Disable sending ks/ke termcap strings */
45			int twiddle; /* Show tildes after EOF */
46			int show_attn; /* Hilite first unread line */
47			int status_col; /* Display a status column */
48			int use_lessopen; /* Use the LESSOPEN filter */
49			int quit_on_intr; /* Quit on interrupt */
50			int follow_mode; /* F cmd Follows file desc or file name? */
51			int oldbot; /* Old bottom of screen behavior {{REMOVE}} */
52			int opt_use_backslash; /* Use backslash escaping in option parsing */
53			int hilite_search; /* Highlight matched search patterns? */
54
55			int less_is_more = 0; /* Make compatible with POSIX more */
56
57			/*
58			* Long option names.
59			*/
60			static struct optname a_optname = { "search-skip-screen", NULL };
61			static struct optname b_optname = { "buffers", NULL };
62			static struct optname B__optname = { "auto-buffers", NULL };
63			static struct optname c_optname = { "clear-screen", NULL };
64			static struct optname d_optname = { "dumb", NULL };
65			static struct optname e_optname = { "quit-at-eof", NULL };
66			static struct optname f_optname = { "force", NULL };
67			static struct optname F__optname = { "quit-if-one-screen", NULL };
68			static struct optname g_optname = { "hilite-search", NULL };
69			static struct optname h_optname = { "max-back-scroll", NULL };
70			static struct optname i_optname = { "ignore-case", NULL };
71			static struct optname j_optname = { "jump-target", NULL };
72			static struct optname J__optname = { "status-column", NULL };
73			static struct optname k_optname = { "lesskey-file", NULL };
74			static struct optname K__optname = { "quit-on-intr", NULL };
75			static struct optname L__optname = { "no-lessopen", NULL };
76			static struct optname m_optname = { "long-prompt", NULL };
77			static struct optname n_optname = { "line-numbers", NULL };
78			static struct optname o_optname = { "log-file", NULL };
79			static struct optname O__optname = { "LOG-FILE", NULL };
80			static struct optname p_optname = { "pattern", NULL };
81			static struct optname P__optname = { "prompt", NULL };
82			static struct optname q2_optname = { "silent", NULL };
83			static struct optname q_optname = { "quiet", &q2_optname };
84			static struct optname r_optname = { "raw-control-chars", NULL };
85			static struct optname s_optname = { "squeeze-blank-lines", NULL };
86			static struct optname S__optname = { "chop-long-lines", NULL };
87			static struct optname t_optname = { "tag", NULL };
88			static struct optname T__optname = { "tag-file", NULL };
89			static struct optname u_optname = { "underline-special", NULL };
90			static struct optname V__optname = { "version", NULL };
91			static struct optname w_optname = { "hilite-unread", NULL };
92			static struct optname x_optname = { "tabs", NULL };
93			static struct optname X__optname = { "no-init", NULL };
94			static struct optname y_optname = { "max-forw-scroll", NULL };
95			static struct optname z_optname = { "window", NULL };
96			static struct optname quote_optname = { "quotes", NULL };
97			static struct optname tilde_optname = { "tilde", NULL };
98			static struct optname query_optname = { "help", NULL };
99			static struct optname pound_optname = { "shift", NULL };
100			static struct optname keypad_optname = { "no-keypad", NULL };
101			static struct optname oldbot_optname = { "old-bot", NULL };
102			static struct optname follow_optname = { "follow-name", NULL };
103			static struct optname use_backslash_optname = { "use-backslash", NULL };
104
105
106			/*
107			* Table of all options and their semantics.
108			*
109			* For BOOL and TRIPLE options, odesc[0], odesc[1], odesc[2] are
110			* the description of the option when set to 0, 1 or 2, respectively.
111			* For NUMBER options, odesc[0] is the prompt to use when entering
112			* a new value, and odesc[1] is the description, which should contain
113			* one %d which is replaced by the value of the number.
114			* For STRING options, odesc[0] is the prompt to use when entering
115			* a new value, and odesc[1], if not NULL, is the set of characters
116			* that are valid in the string.
117			*/
118			static struct loption option[] = {
119			{ 'a', &a_optname,
120			TRIPLE, OPT_ONPLUS, &how_search, NULL,
121			{
122			"Search includes displayed screen",
123			"Search skips displayed screen",
124			"Search includes all of displayed screen"
125			}
126			},
127
128			{ 'b', &b_optname,
129			NUMBER\|INIT_HANDLER, 64, &bufspace, opt_b,
130			{
131			"Max buffer space per file (K): ",
132			"Max buffer space per file: %dK",
133			NULL
134			}
135			},
136			{ 'B', &B__optname,
137			BOOL, OPT_ON, &autobuf, NULL,
138			{
139			"Don't automatically allocate buffers",
140			"Automatically allocate buffers when needed",
141			NULL
142			}
143			},
144			{ 'c', &c_optname,
145			TRIPLE\|MORE_OK, OPT_ON, &top_scroll, NULL,
146			{
147			"Repaint by scrolling from bottom of screen",
148			"Repaint by painting from top of screen",
149			"Repaint by painting from top of screen"
150			}
151			},
152			{ 'd', &d_optname,
153			BOOL\|MORE_OK\|NO_TOGGLE, OPT_OFF, &know_dumb, NULL,
154			{
155			"Assume intelligent terminal",
156			"Assume dumb terminal",
157			NULL
158			}
159			},
160			{ 'e', &e_optname,
161			TRIPLE, OPT_OFF, &quit_at_eof, NULL,
162			{
163			"Don't quit at end-of-file",
164			"Quit at end-of-file",
165			"Quit immediately at end-of-file"
166			}
167			},
168			{ 'f', &f_optname,
169			BOOL, OPT_OFF, &force_open, NULL,
170			{
171			"Open only regular files",
172			"Open even non-regular files",
173			NULL
174			}
175			},
176			{ 'F', &F__optname,
177			BOOL, OPT_OFF, &quit_if_one_screen, NULL,
178			{
179			"Don't quit if end-of-file on first screen",
180			"Quit if end-of-file on first screen",
181			NULL
182			}
183			},
184			{ 'g', &g_optname,
185			TRIPLE\|HL_REPAINT, OPT_ONPLUS, &hilite_search, NULL,
186			{
187			"Don't highlight search matches",
188			"Highlight matches for previous search only",
189			"Highlight all matches for previous search pattern",
190			}
191			},
192			{ 'h', &h_optname,
193			NUMBER, -1, &back_scroll, NULL,
194			{
195			"Backwards scroll limit: ",
196			"Backwards scroll limit is %d lines",
197			NULL
198			}
199			},
200			{ 'i', &i_optname,
201			TRIPLE\|HL_REPAINT, OPT_OFF, &caseless, opt_i,
202			{
203			"Case is significant in searches",
204			"Ignore case in searches",
205			"Ignore case in searches and in patterns"
206			}
207			},
208			{ 'j', &j_optname,
209			STRING, 0, NULL, opt_j,
210			{
211			"Target line: ",
212			"0123456789.-",
213			NULL
214			}
215			},
216			{ 'J', &J__optname,
217			BOOL\|REPAINT, OPT_OFF, &status_col, NULL,
218			{
219			"Don't display a status column",
220			"Display a status column",
221			NULL
222			}
223			},
224			{ 'k', &k_optname,
225			STRING\|NO_TOGGLE\|NO_QUERY, 0, NULL, opt_k,
226			{ NULL, NULL, NULL }
227			},
228			{ 'K', &K__optname,
229			BOOL, OPT_OFF, &quit_on_intr, NULL,
230			{
231			"Interrupt (ctrl-C) returns to prompt",
232			"Interrupt (ctrl-C) exits less",
233			NULL
234			}
235			},
236			{ 'L', &L__optname,
237			BOOL, OPT_ON, &use_lessopen, NULL,
238			{
239			"Don't use the LESSOPEN filter",
240			"Use the LESSOPEN filter",
241			NULL
242			}
243			},
244			{ 'm', &m_optname,
245			TRIPLE, OPT_OFF, &pr_type, NULL,
246			{
247			"Short prompt",
248			"Medium prompt",
249			"Long prompt"
250			}
251			},
252			{ 'n', &n_optname,
253			TRIPLE\|REPAINT, OPT_ON, &linenums, NULL,
254			{
255			"Don't use line numbers",
256			"Use line numbers",
257			"Constantly display line numbers"
258			}
259			},
260			{ 'o', &o_optname,
261			STRING, 0, NULL, opt_o,
262			{ "log file: ", NULL, NULL }
263			},
264			{ 'O', &O__optname,
265			STRING, 0, NULL, opt__O,
266			{ "Log file: ", NULL, NULL }
267			},
268			{ 'p', &p_optname,
269			STRING\|NO_TOGGLE\|NO_QUERY\|MORE_OK, 0, NULL, opt_p,
270			{ NULL, NULL, NULL }
271			},
272			{ 'P', &P__optname,
273			STRING, 0, NULL, opt__P,
274			{ "prompt: ", NULL, NULL }
275			},
276			{ 'q', &q_optname,
277			TRIPLE, OPT_OFF, &quiet, NULL,
278			{
279			"Ring the bell for errors AND at eof/bof",
280			"Ring the bell for errors but not at eof/bof",
281			"Never ring the bell"
282			}
283			},
284			{ 'r', &r_optname,
285			TRIPLE\|REPAINT, OPT_OFF, &ctldisp, NULL,
286			{
287			"Display control characters as ^X",
288			"Display control characters directly",
289			"Display control characters directly, "
290			"processing ANSI sequences"
291			}
292			},
293			{ 's', &s_optname,
294			BOOL\|REPAINT\|MORE_OK, OPT_OFF, &squeeze, NULL,
295			{
296			"Display all blank lines",
297			"Squeeze multiple blank lines",
298			NULL
299			}
300			},
301			{ 'S', &S__optname,
302			BOOL\|REPAINT, OPT_OFF, &chopline, NULL,
303			{
304			"Fold long lines",
305			"Chop long lines",
306			NULL
307			}
308			},
309			{ 't', &t_optname,
310			STRING\|NO_QUERY\|MORE_OK, 0, NULL, opt_t,
311			{ "tag: ", NULL, NULL }
312			},
313			{ 'T', &T__optname,
314			STRING\|MORE_OK, 0, NULL, opt__T,
315			{ "tags file: ", NULL, NULL }
316			},
317			{ 'u', &u_optname,
318			TRIPLE\|REPAINT, OPT_OFF, &bs_mode, NULL,
319			{
320			"Display underlined text in underline mode",
321			"Backspaces cause overstrike",
322			"Print backspace as ^H"
323			}
324			},
325			{ 'V', &V__optname,
326			NOVAR, 0, NULL, opt__V,
327			{ NULL, NULL, NULL }
328			},
329			{ 'w', &w_optname,
330			TRIPLE\|REPAINT, OPT_OFF, &show_attn, NULL,
331			{
332			"Don't highlight first unread line",
333			"Highlight first unread line after forward-screen",
334			"Highlight first unread line after any "
335			"forward movement",
336			}
337			},
338			{ 'x', &x_optname,
339			STRING\|REPAINT, 0, NULL, opt_x,
340			{
341			"Tab stops: ",
342			"0123456789,",
343			NULL
344			}
345			},
346			{ 'X', &X__optname,
347			BOOL\|NO_TOGGLE, OPT_OFF, &no_init, NULL,
348			{
349			"Send init/deinit strings to terminal",
350			"Don't use init/deinit strings",
351			NULL
352			}
353			},
354			{ 'y', &y_optname,
355			NUMBER, -1, &forw_scroll, NULL,
356			{
357			"Forward scroll limit: ",
358			"Forward scroll limit is %d lines",
359			NULL
360			}
361			},
362			{ 'z', &z_optname,
363			NUMBER, -1, &swindow, NULL,
364			{
365			"Scroll window size: ",
366			"Scroll window size is %d lines",
367			NULL
368			}
369			},
370			{ '"', &quote_optname,
371			STRING, 0, NULL, opt_quote,
372			{ "quotes: ", NULL, NULL }
373			},
374			{ '~', &tilde_optname,
375			BOOL\|REPAINT, OPT_ON, &twiddle, NULL,
376			{
377			"Don't show tildes after end of file",
378			"Show tildes after end of file",
379			NULL
380			}
381			},
382			{ '?', &query_optname,
383			NOVAR, 0, NULL, opt_query,
384			{ NULL, NULL, NULL }
385			},
386			{ '#', &pound_optname,
387			STRING, 0, NULL, opt_shift,
388			{
389			"Horizontal shift: ",
390			"0123456789.",
391			NULL
392			}
393			},
394			{ OLETTER_NONE, &keypad_optname,
395			BOOL\|NO_TOGGLE, OPT_OFF, &no_keypad, NULL,
396			{
397			"Use keypad mode",
398			"Don't use keypad mode",
399			NULL
400			}
401			},
402			{ OLETTER_NONE, &oldbot_optname,
403			BOOL, OPT_OFF, &oldbot, NULL,
404			{
405			"Use new bottom of screen behavior",
406			"Use old bottom of screen behavior",
407			NULL
408			}
409			},
410			{ OLETTER_NONE, &follow_optname,
411			BOOL, FOLLOW_DESC, &follow_mode, NULL,
412			{
413			"F command follows file descriptor",
414			"F command follows file name",
415			NULL
416			}
417			},
418			{ OLETTER_NONE, &use_backslash_optname,
419			BOOL, OPT_OFF, &opt_use_backslash, NULL,
420			{
421			"Use backslash escaping in command line parameters",
422			"Don't use backslash escaping in command line "
423			"parameters",
424			NULL
425			}
426			},
427			{ '\0', NULL, NOVAR, 0, NULL, NULL, { NULL, NULL, NULL } }
428			};
429
430
431			/*
432			* Initialize each option to its default value.
433			*/
434			void
435			init_option(void)
436			{
437			struct loption *o;
438
439	✓✓	712	for (o = option; o->oletter != '\0'; o++) {
440			/*
441			* Set each variable to its default.
442			*/
443	✓✓	344	if (o->ovar != NULL)
444		240	*(o->ovar) = o->odefault;
445	✓✓	344	if (o->otype & INIT_HANDLER)
446		8	(*(o->ofunc))(INIT, NULL);
447			}
448		8	}
449
450			/*
451			* Find an option in the option table, given its option letter.
452			*/
453			struct loption *
454			findopt(int c)
455			{
456			struct loption *o;
457
458			for (o = option; o->oletter != '\0'; o++) {
459			if (o->oletter == c)
460			return (o);
461			if ((o->otype & TRIPLE) &&
462			(toupper((unsigned char)o->oletter) == c))
463			return (o);
464			}
465			return (NULL);
466			}
467
468			/*
469			*
470			*/
471			static int
472			is_optchar(unsigned char c)
473			{
474			if (isupper(c) \|\| islower(c) \|\| c == '-')
475			return (1);
476			else
477			return (0);
478			}
479
480			/*
481			* Find an option in the option table, given its option name.
482			* p_optname is the (possibly partial) name to look for, and
483			* is updated to point after the matched name.
484			* p_oname if non-NULL is set to point to the full option name.
485			*/
486			struct loption *
487			findopt_name(char p_optname, char p_oname, int *p_err)
488			{
489			char optname = p_optname;
490			struct loption *o;
491			struct optname *oname;
492			int len;
493			int uppercase;
494			struct loption *maxo = NULL;
495			struct optname *maxoname = NULL;
496			int maxlen = 0;
497			int ambig = 0;
498			int exact = 0;
499
500			/*
501			* Check all options.
502			*/
503			for (o = option; o->oletter != '\0'; o++) {
504			/*
505			* Check all names for this option.
506			*/
507			for (oname = o->onames; oname != NULL; oname = oname->onext) {
508			/*
509			* Try normal match first (uppercase == 0),
510			* then, then if it's a TRIPLE option,
511			* try uppercase match (uppercase == 1).
512			*/
513			for (uppercase = 0; uppercase <= 1; uppercase++) {
514			len = sprefix(optname, oname->oname, uppercase);
515			if (len <= 0 \|\| is_optchar(optname[len])) {
516			/*
517			* We didn't use all of the option name.
518			*/
519			continue;
520			}
521			if (!exact && len == maxlen) {
522			/*
523			* Already had a partial match,
524			* and now there's another one that
525			* matches the same length.
526			*/
527			ambig = 1;
528			} else if (len > maxlen) {
529			/*
530			* Found a better match than
531			* the one we had.
532			*/
533			maxo = o;
534			maxoname = oname;
535			maxlen = len;
536			ambig = 0;
537			exact = (len == strlen(oname->oname));
538			}
539			if (!(o->otype & TRIPLE))
540			break;
541			}
542			}
543			}
544			if (ambig) {
545			/*
546			* Name matched more than one option.
547			*/
548			if (p_err != NULL)
549			*p_err = OPT_AMBIG;
550			return (NULL);
551			}
552			*p_optname = optname + maxlen;
553			if (p_oname != NULL)
554			*p_oname = maxoname == NULL ? NULL : maxoname->oname;
555			return (maxo);
556			}