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NetBSD/lib/libcurses/setterm.c

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/* $NetBSD: setterm.c,v 1.52 2013/10/16 19:59:29 roy Exp $ */
/*
* Copyright (c) 1981, 1993, 1994
* The Regents of the University of California. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
* 1. Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
* 3. Neither the name of the University nor the names of its contributors
* may be used to endorse or promote products derived from this software
* without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
* SUCH DAMAGE.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94";
#else
__RCSID("$NetBSD: setterm.c,v 1.52 2013/10/16 19:59:29 roy Exp $");
#endif
#endif /* not lint */
#include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <unistd.h>
#include "curses.h"
#include "curses_private.h"
static int does_esc_m(const char *cap);
static int does_ctrl_o(const char *exit_cap, const char *acs_cap);
attr_t __mask_op, __mask_me, __mask_ue, __mask_se;
int
setterm(char *type)
{
return _cursesi_setterm(type, _cursesi_screen);
}
int
_cursesi_setterm(char *type, SCREEN *screen)
{
int unknown, r;
struct winsize win;
char *p;
if (type[0] == '\0')
type = "xx";
unknown = 0;
(void)ti_setupterm(&screen->term, type, fileno(screen->outfd), &r);
if (screen->term == NULL) {
unknown++;
(void)ti_setupterm(&screen->term, "dumb",
fileno(screen->outfd), &r);
/* No dumb term? We can't continue */
if (screen->term == NULL)
return ERR;
}
#ifdef DEBUG
__CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type);
#endif
/* Try TIOCGWINSZ, and, if it fails, the terminfo entry. */
if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 &&
win.ws_row != 0 && win.ws_col != 0) {
screen->LINES = win.ws_row;
screen->COLS = win.ws_col;
} else {
if (unknown) {
screen->LINES = -1;
screen->COLS = -1;
} else {
screen->LINES = t_lines(screen->term);
screen->COLS = t_columns(screen->term);
}
}
/* POSIX 1003.2 requires that the environment override. */
if ((p = getenv("LINES")) != NULL)
screen->LINES = (int) strtol(p, NULL, 0);
if ((p = getenv("COLUMNS")) != NULL)
screen->COLS = (int) strtol(p, NULL, 0);
if ((p = getenv("ESCDELAY")) != NULL)
ESCDELAY = (int) strtol(p, NULL, 0);
if ((p = getenv("TABSIZE")) != NULL)
screen->TABSIZE = (int) strtol(p, NULL, 0);
else if (t_init_tabs(screen->term) >= 0)
screen->TABSIZE = (int) t_init_tabs(screen->term);
else
screen->TABSIZE = 8;
/*
* Want cols > 4, otherwise things will fail.
*/
if (screen->COLS <= 4)
return (ERR);
LINES = screen->LINES;
COLS = screen->COLS;
TABSIZE = screen->TABSIZE;
#ifdef DEBUG
__CTRACE(__CTRACE_INIT,
"setterm: LINES = %d, COLS = %d\n, TABSIZE = %d\n",
LINES, COLS, TABSIZE);
#endif
/*
* set the pad char, only take the first char of the pc capability
* as this is all we can use.
*/
screen->padchar = t_pad_char(screen->term) ?
t_pad_char(screen->term)[0] : 0;
/* If no scrolling commands, no quick change. */
screen->noqch =
(t_change_scroll_region(screen->term) == NULL ||
t_cursor_home(screen->term) == NULL ||
(t_parm_index(screen->term) == NULL &&
t_scroll_forward(screen->term) == NULL) ||
(t_parm_rindex(screen->term) == NULL &&
t_scroll_reverse(screen->term) == NULL)) &&
((t_parm_insert_line(screen->term) == NULL &&
t_insert_line(screen->term) == NULL) ||
(t_parm_delete_line(screen->term) == NULL &&
t_delete_line(screen->term) == NULL));
/*
* Precalculate conflict info for color/attribute end commands.
*/
#ifndef HAVE_WCHAR
screen->mask_op = __ATTRIBUTES & ~__COLOR;
#else
screen->mask_op = WA_ATTRIBUTES & ~__COLOR;
#endif /* HAVE_WCHAR */
if (t_orig_pair(screen->term) != NULL) {
if (does_esc_m(t_orig_pair(screen->term)))
screen->mask_op &=
~(__STANDOUT | __UNDERSCORE | __TERMATTR);
else {
if (t_exit_standout_mode(screen->term) != NULL &&
!strcmp(t_orig_pair(screen->term),
t_exit_standout_mode(screen->term)))
screen->mask_op &= ~__STANDOUT;
if (t_exit_underline_mode(screen->term) != NULL &&
!strcmp(t_orig_pair(screen->term),
t_exit_underline_mode(screen->term)))
screen->mask_op &= ~__UNDERSCORE;
if (t_exit_attribute_mode(screen->term) != NULL &&
!strcmp(t_orig_pair(screen->term),
t_exit_attribute_mode(screen->term)))
screen->mask_op &= ~__TERMATTR;
}
}
/*
* Assume that "me" turns off all attributes apart from ACS.
* It might turn off ACS, so check for that.
*/
if (t_exit_attribute_mode(screen->term) != NULL &&
t_exit_alt_charset_mode(screen->term) != NULL &&
does_ctrl_o(t_exit_attribute_mode(screen->term),
t_exit_alt_charset_mode(screen->term)))
screen->mask_me = 0;
else
screen->mask_me = __ALTCHARSET;
/* Check what turning off the attributes also turns off */
#ifndef HAVE_WCHAR
screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE;
#else
screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE;
#endif /* HAVE_WCHAR */
if (t_exit_underline_mode(screen->term) != NULL) {
if (does_esc_m(t_exit_underline_mode(screen->term)))
screen->mask_ue &=
~(__STANDOUT | __TERMATTR | __COLOR);
else {
if (t_exit_standout_mode(screen->term) != NULL &&
!strcmp(t_exit_underline_mode(screen->term),
t_exit_standout_mode(screen->term)))
screen->mask_ue &= ~__STANDOUT;
if (t_exit_attribute_mode(screen->term) != NULL &&
!strcmp(t_exit_underline_mode(screen->term),
t_exit_attribute_mode(screen->term)))
screen->mask_ue &= ~__TERMATTR;
if (t_orig_pair(screen->term) != NULL &&
!strcmp(t_exit_underline_mode(screen->term),
t_orig_pair(screen->term)))
screen->mask_ue &= ~__COLOR;
}
}
#ifndef HAVE_WCHAR
screen->mask_se = __ATTRIBUTES & ~__STANDOUT;
#else
screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT;
#endif /* HAVE_WCHAR */
if (t_exit_standout_mode(screen->term) != NULL) {
if (does_esc_m(t_exit_standout_mode(screen->term)))
screen->mask_se &=
~(__UNDERSCORE | __TERMATTR | __COLOR);
else {
if (t_exit_underline_mode(screen->term) != NULL &&
!strcmp(t_exit_standout_mode(screen->term),
t_exit_underline_mode(screen->term)))
screen->mask_se &= ~__UNDERSCORE;
if (t_exit_attribute_mode(screen->term) != NULL &&
!strcmp(t_exit_standout_mode(screen->term),
t_exit_attribute_mode(screen->term)))
screen->mask_se &= ~__TERMATTR;
if (t_orig_pair(screen->term) != NULL &&
!strcmp(t_exit_standout_mode(screen->term),
t_orig_pair(screen->term)))
screen->mask_se &= ~__COLOR;
}
}
return (unknown ? ERR : OK);
}
/*
* _cursesi_resetterm --
* Copy the terminal instance data for the given screen to the global
* variables.
*/
void
_cursesi_resetterm(SCREEN *screen)
{
LINES = screen->LINES;
COLS = screen->COLS;
TABSIZE = screen->TABSIZE;
__GT = screen->GT;
__noqch = screen->noqch;
__mask_op = screen->mask_op;
__mask_me = screen->mask_me;
__mask_ue = screen->mask_ue;
__mask_se = screen->mask_se;
set_curterm(screen->term);
}
/*
* does_esc_m --
* A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off
* other attributes, so we check for this in the capability passed to us.
* Note that we can't just do simple string comparison, as the capability
* may contain multiple, ';' separated sequence parts.
*/
static int
does_esc_m(const char *cap)
{
#define WAITING 0
#define PARSING 1
#define NUMBER 2
#define FOUND 4
const char *capptr;
int seq;
#ifdef DEBUG
__CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap);
#endif
/* Is it just "\E[m" or "\E[0m"? */
if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m"))
return 1;
/* Does it contain a "\E[...m" sequence? */
if (strlen(cap) < 4)
return 0;
capptr = cap;
seq = WAITING;
while (*capptr != 0) {
switch (seq) {
/* Start of sequence */
case WAITING:
if (!strncmp(capptr, "\x1b[", 2)) {
capptr+=2;
if (*capptr == 'm')
return 1;
else {
seq=PARSING;
continue;
}
}
break;
/* Looking for '0' */
case PARSING:
if (*capptr == '0')
seq=FOUND;
else if (*capptr > '0' && *capptr <= '9')
seq=NUMBER;
else if (*capptr != ';')
seq=WAITING;
break;
/* Some other number */
case NUMBER:
if (*capptr == ';')
seq=PARSING;
else if (!(*capptr >= '0' && *capptr <= '9'))
seq=WAITING;
break;
/* Found a '0' */
case FOUND:
if (*capptr == 'm')
return 1;
else if (!((*capptr >= '0' && *capptr <= '9') ||
*capptr == ';'))
seq=WAITING;
break;
default:
break;
}
capptr++;
}
return 0;
}
/*
* does_ctrl_o --
* A hack for vt100/xterm-like terminals where the "me" capability also
* unsets acs.
*/
static int
does_ctrl_o(const char *exit_cap, const char *acs_cap)
{
const char *eptr = exit_cap, *aptr = acs_cap;
int l;
#ifdef DEBUG
__CTRACE(__CTRACE_INIT, "does_ctrl_o: Testing %s for %s\n", eptr, aptr);
#endif
l = strlen(acs_cap);
while (*eptr != 0) {
if (!strncmp(eptr, aptr, l))
return 1;
eptr++;
}
return 0;
}
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