f90603d08a
the check for 'bs'... my previous commit should have included the following text: fixes problem introduced in 1.13 where the setting of "BC" (backspace char) was left to libterm rather than being done by hack itself. the problem with this was that hack was directly setting BC to \b if there was no "bc" in the termcap entry, but libterm does not do this. this resulted in the xputs(BC) calls in nocmov() and backsp() incorrectly doing nothing, thus messing up the display. added new var BC_BS to provide the old behavior for nocmov() and backsp().
349 lines
7.9 KiB
C
349 lines
7.9 KiB
C
/* $NetBSD: hack.termcap.c,v 1.15 2007/01/17 02:35:28 chuck Exp $ */
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/*
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* Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
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* Amsterdam
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* 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 are
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* met:
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*
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* - Redistributions of source code must retain the above copyright notice,
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* this list of conditions and the following disclaimer.
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*
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* - 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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*
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* - Neither the name of the Stichting Centrum voor Wiskunde en
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* Informatica, nor the names of its contributors may be used to endorse or
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* promote products derived from this software without specific prior
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* written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS
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* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
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* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER
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* OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
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* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
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* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
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* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
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* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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/*
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* Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
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* 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. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES,
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* INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL
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* THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL,
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* EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO,
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* PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS;
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* OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY,
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* WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR
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* OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF
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* ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__RCSID("$NetBSD: hack.termcap.c,v 1.15 2007/01/17 02:35:28 chuck Exp $");
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#endif /* not lint */
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#include <string.h>
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#include <termios.h>
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#include <termcap.h>
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#include <stdlib.h>
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#include <unistd.h>
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#include "hack.h"
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#include "extern.h"
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#include "def.flag.h" /* for flags.nonull */
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static struct tinfo *info;
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static char *HO, *CL, *CE, *CM, *ND, *XD, *BC_BS, *SO, *SE, *TI, *TE;
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static char *VS, *VE;
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static int SG;
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char *CD; /* tested in pri.c: docorner() */
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int CO, LI; /* used in pri.c and whatis.c */
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void
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startup()
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{
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char *term;
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/* UP, BC, PC already set */
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if (!(term = getenv("TERM")))
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error("Can't get TERM.");
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if (!strncmp(term, "5620", 4))
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flags.nonull = 1; /* this should be a termcap flag */
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if (t_getent(&info, term) < 1)
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error("Unknown terminal type: %s.", term);
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BC_BS = t_agetstr(info, "bc");
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if (!BC_BS) {
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if (!t_getflag(info, "bs"))
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error("Terminal must backspace.");
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BC_BS = "\b";
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}
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HO = t_agetstr(info, "ho");
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CO = t_getnum(info, "co");
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LI = t_getnum(info, "li");
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if (CO < COLNO || LI < ROWNO + 2)
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setclipped();
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if (!(CL = t_agetstr(info, "cl")))
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error("Hack needs CL.");
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ND = t_agetstr(info, "nd");
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if (t_getflag(info, "os"))
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error("Hack can't have OS.");
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CE = t_agetstr(info, "ce");
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/*
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* It seems that xd is no longer supported, and we should use a
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* linefeed instead; unfortunately this requires resetting CRMOD, and
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* many output routines will have to be modified slightly. Let's
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* leave that till the next release.
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*/
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XD = t_agetstr(info, "xd");
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/* not: XD = t_agetstr(info, "do"); */
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if (!(CM = t_agetstr(info, "cm"))) {
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if (!UP && !HO)
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error("Hack needs CM or UP or HO.");
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printf("Playing hack on terminals without cm is suspect...\n");
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getret();
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}
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SO = t_agetstr(info, "so");
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SE = t_agetstr(info, "se");
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SG = t_getnum(info, "sg"); /* -1: not fnd; else # of spaces left by so */
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if (!SO || !SE || (SG > 0))
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SO = SE = 0;
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CD = t_agetstr(info, "cd");
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set_whole_screen(); /* uses LI and CD */
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}
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void
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start_screen()
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{
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xputs(TI);
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xputs(VS);
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}
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void
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end_screen()
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{
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xputs(VE);
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xputs(TE);
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}
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/* Cursor movements */
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void
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curs(x, y)
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int x, y; /* not xchar: perhaps xchar is unsigned and
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* curx-x would be unsigned as well */
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{
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if (y == cury && x == curx)
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return;
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if (!ND && (curx != x || x <= 3)) { /* Extremely primitive */
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cmov(x, y); /* bunker!wtm */
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return;
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}
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if (abs(cury - y) <= 3 && abs(curx - x) <= 3)
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nocmov(x, y);
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else if ((x <= 3 && abs(cury - y) <= 3) || (!CM && x < abs(curx - x))) {
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(void) putchar('\r');
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curx = 1;
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nocmov(x, y);
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} else if (!CM) {
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nocmov(x, y);
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} else
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cmov(x, y);
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}
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void
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nocmov(x, y)
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int x, y;
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{
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if (cury > y) {
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if (UP) {
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while (cury > y) { /* Go up. */
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xputs(UP);
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cury--;
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}
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} else if (CM) {
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cmov(x, y);
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} else if (HO) {
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home();
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curs(x, y);
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} /* else impossible("..."); */
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} else if (cury < y) {
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if (XD) {
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while (cury < y) {
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xputs(XD);
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cury++;
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}
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} else if (CM) {
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cmov(x, y);
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} else {
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while (cury < y) {
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xputc('\n');
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curx = 1;
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cury++;
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}
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}
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}
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if (curx < x) { /* Go to the right. */
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if (!ND)
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cmov(x, y);
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else /* bah */
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/* should instead print what is there already */
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while (curx < x) {
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xputs(ND);
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curx++;
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}
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} else if (curx > x) {
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while (curx > x) { /* Go to the left. */
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xputs(BC_BS);
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curx--;
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}
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}
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}
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void
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cmov(x, y)
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int x, y;
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{
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char buf[256];
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if (t_goto(info, CM, x - 1, y - 1, buf, 255) >= 0) {
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xputs(buf);
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cury = y;
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curx = x;
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}
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}
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int
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xputc(c)
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char c;
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{
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return (fputc(c, stdout));
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}
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void
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xputs(s)
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char *s;
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{
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tputs(s, 1, xputc);
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}
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void
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cl_end()
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{
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if (CE)
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xputs(CE);
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else { /* no-CE fix - free after Harold Rynes */
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/*
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* this looks terrible, especially on a slow terminal but is
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* better than nothing
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*/
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int cx = curx, cy = cury;
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while (curx < COLNO) {
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xputc(' ');
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curx++;
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}
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curs(cx, cy);
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}
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}
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void
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clear_screen()
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{
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xputs(CL);
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curx = cury = 1;
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}
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void
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home()
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{
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char buf[256];
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if (HO)
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xputs(HO);
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else if ((CM) && (t_goto(info, CM, 0, 0, buf, 255) >= 0))
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xputs(buf);
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else
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curs(1, 1); /* using UP ... */
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curx = cury = 1;
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}
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void
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standoutbeg()
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{
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if (SO)
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xputs(SO);
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}
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void
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standoutend()
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{
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if (SE)
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xputs(SE);
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}
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void
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backsp()
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{
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xputs(BC_BS);
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curx--;
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}
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void
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bell()
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{
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(void) putchar('\007'); /* curx does not change */
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(void) fflush(stdout);
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}
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void
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delay_output()
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{
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/* delay 50 ms - could also use a 'nap'-system call */
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/* or the usleep call like this :-) */
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usleep(50000);
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}
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void
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cl_eos()
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{ /* free after Robert Viduya *//* must only be
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* called with curx = 1 */
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if (CD)
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xputs(CD);
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else {
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int cx = curx, cy = cury;
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while (cury <= LI - 2) {
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cl_end();
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xputc('\n');
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curx = 1;
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cury++;
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}
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cl_end();
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curs(cx, cy);
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}
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}
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