GCC Code Coverage Report
Directory: ./ Exec Total Coverage
File: usr.bin/tmux/tty-acs.c Lines: 0 19 0.0 %
Date: 2017-11-13 Branches: 0 14 0.0 %

Line Branch Exec Source
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/* $OpenBSD: tty-acs.c,v 1.6 2017/05/15 16:44:04 nicm Exp $ */
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/*
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 * Copyright (c) 2010 Nicholas Marriott <nicholas.marriott@gmail.com>
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 *
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 * Permission to use, copy, modify, and distribute this software for any
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 * purpose with or without fee is hereby granted, provided that the above
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 * copyright notice and this permission notice appear in all copies.
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 *
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 * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
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 * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
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 * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
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 * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
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 * WHATSOEVER RESULTING FROM LOSS OF MIND, USE, DATA OR PROFITS, WHETHER
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 * IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING
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 * OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
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 */
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#include <sys/types.h>
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#include <stdlib.h>
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#include "tmux.h"
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static int	tty_acs_cmp(const void *, const void *);
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/* Table mapping ACS entries to UTF-8. */
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struct tty_acs_entry {
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	u_char	 	 key;
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	const char	*string;
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};
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static const struct tty_acs_entry tty_acs_table[] = {
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	{ '+', "\342\206\222" },	/* arrow pointing right */
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	{ ',', "\342\206\220" },	/* arrow pointing left */
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	{ '-', "\342\206\221" },	/* arrow pointing up */
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	{ '.', "\342\206\223" },	/* arrow pointing down */
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	{ '0', "\342\226\256" },	/* solid square block */
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	{ '`', "\342\227\206" },	/* diamond */
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	{ 'a', "\342\226\222" },	/* checker board (stipple) */
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	{ 'f', "\302\260" },		/* degree symbol */
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	{ 'g', "\302\261" },		/* plus/minus */
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	{ 'h', "\342\226\222" },	/* board of squares */
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	{ 'i', "\342\230\203" },	/* lantern symbol */
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	{ 'j', "\342\224\230" },	/* lower right corner */
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	{ 'k', "\342\224\220" },	/* upper right corner */
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	{ 'l', "\342\224\214" },	/* upper left corner */
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	{ 'm', "\342\224\224" },	/* lower left corner */
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	{ 'n', "\342\224\274" },	/* large plus or crossover */
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	{ 'o', "\342\216\272" },	/* scan line 1 */
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	{ 'p', "\342\216\273" },	/* scan line 3 */
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	{ 'q', "\342\224\200" },	/* horizontal line */
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	{ 'r', "\342\216\274" },	/* scan line 7 */
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	{ 's', "\342\216\275" },	/* scan line 9 */
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	{ 't', "\342\224\234" },	/* tee pointing right */
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	{ 'u', "\342\224\244" },	/* tee pointing left */
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	{ 'v', "\342\224\264" },	/* tee pointing up */
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	{ 'w', "\342\224\254" },	/* tee pointing down */
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	{ 'x', "\342\224\202" },	/* vertical line */
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	{ 'y', "\342\211\244" },	/* less-than-or-equal-to */
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	{ 'z', "\342\211\245" },	/* greater-than-or-equal-to */
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	{ '{', "\317\200" },   		/* greek pi */
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	{ '|', "\342\211\240" },	/* not-equal */
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	{ '}', "\302\243" },		/* UK pound sign */
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	{ '~', "\302\267" }		/* bullet */
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};
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static int
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tty_acs_cmp(const void *key, const void *value)
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{
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	const struct tty_acs_entry	*entry = value;
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	u_char				 ch;
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	ch = *(u_char *) key;
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	return (ch - entry->key);
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}
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/* Should this terminal use ACS instead of UTF-8 line drawing? */
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int
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tty_acs_needed(struct tty *tty)
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{
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	if (tty == NULL)
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		return (0);
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	/*
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	 * If the U8 flag is present, it marks whether a terminal supports
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	 * UTF-8 and ACS together.
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	 *
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	 * If it is present and zero, we force ACS - this gives users a way to
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	 * turn off UTF-8 line drawing.
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	 *
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	 * If it is nonzero, we can fall through to the default and use UTF-8
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	 * line drawing on UTF-8 terminals.
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	 */
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	if (tty_term_has(tty->term, TTYC_U8) &&
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	    tty_term_number(tty->term, TTYC_U8) == 0)
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		return (1);
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	if (tty->flags & TTY_UTF8)
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		return (0);
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	return (1);
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}
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/* Retrieve ACS to output as a string. */
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const char *
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tty_acs_get(struct tty *tty, u_char ch)
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{
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	struct tty_acs_entry	*entry;
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	/* Use the ACS set instead of UTF-8 if needed. */
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	if (tty_acs_needed(tty)) {
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		if (tty->term->acs[ch][0] == '\0')
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			return (NULL);
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		return (&tty->term->acs[ch][0]);
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	}
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	/* Otherwise look up the UTF-8 translation. */
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	entry = bsearch(&ch, tty_acs_table, nitems(tty_acs_table),
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	    sizeof tty_acs_table[0], tty_acs_cmp);
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	if (entry == NULL)
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		return (NULL);
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	return (entry->string);
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}