361 lines
9.8 KiB
C
361 lines
9.8 KiB
C
/* $NetBSD: setterm.c,v 1.47 2010/02/11 11:45:47 roy Exp $ */
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/*
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* Copyright (c) 1981, 1993, 1994
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* The Regents of the University of California. All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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#if 0
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static char sccsid[] = "@(#)setterm.c 8.8 (Berkeley) 10/25/94";
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#else
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__RCSID("$NetBSD: setterm.c,v 1.47 2010/02/11 11:45:47 roy Exp $");
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#endif
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#endif /* not lint */
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#include <sys/ioctl.h> /* TIOCGWINSZ on old systems. */
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#include <stdlib.h>
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#include <string.h>
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#include <termios.h>
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#include <unistd.h>
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#include "curses.h"
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#include "curses_private.h"
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static int does_esc_m(const char *cap);
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static int does_ctrl_o(const char *cap);
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attr_t __mask_op, __mask_me, __mask_ue, __mask_se;
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int
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setterm(char *type)
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{
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return _cursesi_setterm(type, _cursesi_screen);
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}
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int
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_cursesi_setterm(char *type, SCREEN *screen)
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{
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int unknown, r;
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struct winsize win;
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char *p;
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if (type[0] == '\0')
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type = "xx";
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unknown = 0;
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(void)ti_setupterm(&screen->term, type, fileno(screen->outfd), &r);
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if (screen->term == NULL) {
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unknown++;
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(void)ti_setupterm(&screen->term, "dumb",
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fileno(screen->outfd), &r);
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/* No dumb term? We can't continue */
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if (screen->term == NULL)
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return ERR;
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}
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#ifdef DEBUG
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__CTRACE(__CTRACE_INIT, "setterm: tty = %s\n", type);
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#endif
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/* Try TIOCGWINSZ, and, if it fails, the termcap entry. */
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if (ioctl(fileno(screen->outfd), TIOCGWINSZ, &win) != -1 &&
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win.ws_row != 0 && win.ws_col != 0) {
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screen->LINES = win.ws_row;
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screen->COLS = win.ws_col;
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} else {
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if (unknown) {
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screen->LINES = -1;
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screen->COLS = -1;
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} else {
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screen->LINES = t_lines(screen->term);
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screen->COLS = t_columns(screen->term);
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}
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}
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/* POSIX 1003.2 requires that the environment override. */
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if ((p = getenv("LINES")) != NULL)
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screen->LINES = (int) strtol(p, NULL, 0);
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if ((p = getenv("COLUMNS")) != NULL)
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screen->COLS = (int) strtol(p, NULL, 0);
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if ((p = getenv("ESCDELAY")) != NULL)
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ESCDELAY = (int) strtol(p, NULL, 0);
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/*
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* Want cols > 4, otherwise things will fail.
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*/
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if (screen->COLS <= 4)
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return (ERR);
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LINES = screen->LINES;
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COLS = screen->COLS;
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#ifdef DEBUG
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__CTRACE(__CTRACE_INIT, "setterm: LINES = %d, COLS = %d\n",
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LINES, COLS);
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#endif
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/*
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* set the pad char, only take the first char of the pc capability
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* as this is all we can use.
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*/
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screen->padchar = t_pad_char(screen->term) ?
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t_pad_char(screen->term)[0] : 0;
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/* Get full name of terminal */
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if (unknown) {
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strcpy(screen->ttytype, "dumb");
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return ERR;
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}
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if (screen->term->desc == NULL)
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screen->ttytype[0] = '\0';
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else
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strlcpy(screen->ttytype, screen->term->desc,
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sizeof(screen->ttytype));
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/* If no scrolling commands, no quick change. */
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screen->noqch =
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(t_change_scroll_region(screen->term) == NULL ||
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t_cursor_home(screen->term) == NULL ||
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(t_parm_index(screen->term) == NULL &&
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t_scroll_forward(screen->term) == NULL) ||
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(t_parm_rindex(screen->term) == NULL &&
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t_scroll_reverse(screen->term) == NULL)) &&
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((t_parm_insert_line(screen->term) == NULL &&
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t_insert_line(screen->term) == NULL) ||
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(t_parm_delete_line(screen->term) == NULL &&
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t_delete_line(screen->term) == NULL));
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/*
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* Precalculate conflict info for color/attribute end commands.
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*/
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#ifndef HAVE_WCHAR
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screen->mask_op = __ATTRIBUTES & ~__COLOR;
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#else
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screen->mask_op = WA_ATTRIBUTES & ~__COLOR;
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#endif /* HAVE_WCHAR */
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if (t_orig_pair(screen->term) != NULL) {
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if (does_esc_m(t_orig_pair(screen->term)))
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screen->mask_op &=
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~(__STANDOUT | __UNDERSCORE | __TERMATTR);
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else {
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if (t_exit_standout_mode(screen->term) != NULL &&
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!strcmp(t_orig_pair(screen->term),
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t_exit_standout_mode(screen->term)))
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screen->mask_op &= ~__STANDOUT;
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if (t_exit_underline_mode(screen->term) != NULL &&
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!strcmp(t_orig_pair(screen->term),
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t_exit_underline_mode(screen->term)))
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screen->mask_op &= ~__UNDERSCORE;
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if (t_exit_attribute_mode(screen->term) != NULL &&
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!strcmp(t_orig_pair(screen->term),
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t_exit_attribute_mode(screen->term)))
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screen->mask_op &= ~__TERMATTR;
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}
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}
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/*
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* Assume that "me" turns off all attributes apart from ACS.
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* It might turn off ACS, so check for that.
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*/
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if (t_exit_attribute_mode(screen->term) != NULL &&
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does_ctrl_o(t_exit_attribute_mode(screen->term)))
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screen->mask_me = 0;
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else
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screen->mask_me = __ALTCHARSET;
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/* Check what turning off the attributes also turns off */
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#ifndef HAVE_WCHAR
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screen->mask_ue = __ATTRIBUTES & ~__UNDERSCORE;
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#else
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screen->mask_ue = WA_ATTRIBUTES & ~__UNDERSCORE;
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#endif /* HAVE_WCHAR */
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if (t_exit_underline_mode(screen->term) != NULL) {
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if (does_esc_m(t_exit_underline_mode(screen->term)))
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screen->mask_ue &=
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~(__STANDOUT | __TERMATTR | __COLOR);
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else {
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if (t_exit_standout_mode(screen->term) != NULL &&
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!strcmp(t_exit_underline_mode(screen->term),
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t_exit_standout_mode(screen->term)))
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screen->mask_ue &= ~__STANDOUT;
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if (t_exit_attribute_mode(screen->term) != NULL &&
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!strcmp(t_exit_underline_mode(screen->term),
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t_exit_attribute_mode(screen->term)))
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screen->mask_ue &= ~__TERMATTR;
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if (t_orig_pair(screen->term) != NULL &&
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!strcmp(t_exit_underline_mode(screen->term),
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t_orig_pair(screen->term)))
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screen->mask_ue &= ~__COLOR;
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}
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}
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#ifndef HAVE_WCHAR
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screen->mask_se = __ATTRIBUTES & ~__STANDOUT;
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#else
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screen->mask_se = WA_ATTRIBUTES & ~__STANDOUT;
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#endif /* HAVE_WCHAR */
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if (t_exit_standout_mode(screen->term) != NULL) {
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if (does_esc_m(t_exit_standout_mode(screen->term)))
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screen->mask_se &=
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~(__UNDERSCORE | __TERMATTR | __COLOR);
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else {
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if (t_exit_underline_mode(screen->term) != NULL &&
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!strcmp(t_exit_standout_mode(screen->term),
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t_exit_underline_mode(screen->term)))
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screen->mask_se &= ~__UNDERSCORE;
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if (t_exit_attribute_mode(screen->term) != NULL &&
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!strcmp(t_exit_standout_mode(screen->term),
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t_exit_attribute_mode(screen->term)))
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screen->mask_se &= ~__TERMATTR;
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if (t_orig_pair(screen->term) != NULL &&
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!strcmp(t_exit_standout_mode(screen->term),
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t_orig_pair(screen->term)))
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screen->mask_se &= ~__COLOR;
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}
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}
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return (unknown ? ERR : OK);
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}
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/*
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* _cursesi_resetterm --
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* Copy the terminal instance data for the given screen to the global
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* variables.
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*/
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void
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_cursesi_resetterm(SCREEN *screen)
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{
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LINES = screen->LINES;
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COLS = screen->COLS;
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__GT = screen->GT;
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__noqch = screen->noqch;
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__mask_op = screen->mask_op;
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__mask_me = screen->mask_me;
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__mask_ue = screen->mask_ue;
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__mask_se = screen->mask_se;
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set_curterm(screen->term);
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}
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/*
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* does_esc_m --
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* A hack for xterm-like terminals where "\E[m" or "\E[0m" will turn off
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* other attributes, so we check for this in the capability passed to us.
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* Note that we can't just do simple string comparison, as the capability
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* may contain multiple, ';' separated sequence parts.
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*/
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static int
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does_esc_m(const char *cap)
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{
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#define WAITING 0
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#define PARSING 1
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#define NUMBER 2
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#define FOUND 4
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const char *capptr;
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int seq;
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#ifdef DEBUG
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__CTRACE(__CTRACE_INIT, "does_esc_m: Checking %s\n", cap);
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#endif
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/* Is it just "\E[m" or "\E[0m"? */
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if (!strcmp(cap, "\x1b[m") || !strcmp(cap, "\x1b[0m"))
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return 1;
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/* Does it contain a "\E[...m" sequence? */
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if (strlen(cap) < 4)
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return 0;
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capptr = cap;
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seq = WAITING;
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while (*capptr != 0) {
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switch (seq) {
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/* Start of sequence */
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case WAITING:
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if (!strncmp(capptr, "\x1b[", 2)) {
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capptr+=2;
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if (*capptr == 'm')
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return 1;
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else {
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seq=PARSING;
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continue;
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}
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}
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break;
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/* Looking for '0' */
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case PARSING:
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if (*capptr == '0')
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seq=FOUND;
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else if (*capptr > '0' && *capptr <= '9')
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seq=NUMBER;
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else if (*capptr != ';')
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seq=WAITING;
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break;
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/* Some other number */
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case NUMBER:
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if (*capptr == ';')
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seq=PARSING;
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else if (!(*capptr >= '0' && *capptr <= '9'))
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seq=WAITING;
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break;
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/* Found a '0' */
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case FOUND:
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if (*capptr == 'm')
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return 1;
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else if (!((*capptr >= '0' && *capptr <= '9') ||
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*capptr == ';'))
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seq=WAITING;
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break;
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default:
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break;
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}
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capptr++;
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}
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return 0;
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}
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/*
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* does_ctrl_o --
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* A hack for vt100/xterm-like terminals where the "me" capability also
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* unsets acs (i.e. it contains the character '\017').
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*/
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static int
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does_ctrl_o(const char *cap)
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{
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const char *capptr = cap;
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#ifdef DEBUG
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__CTRACE(__CTRACE_INIT, "does_ctrl_o: Looping on %s\n", capptr);
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#endif
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while (*capptr != 0) {
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if (*capptr == '\x0f')
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return 1;
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capptr++;
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}
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return 0;
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}
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