OpenBSD-4.6/games/hack/hack.termcap.c
/* $OpenBSD: hack.termcap.c,v 1.7 2003/05/19 06:30:56 pjanzen Exp $ */
/*
* Copyright (c) 1985, Stichting Centrum voor Wiskunde en Informatica,
* Amsterdam
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* - Redistributions of source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* - 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.
*
* - Neither the name of the Stichting Centrum voor Wiskunde en
* Informatica, 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 COPYRIGHT HOLDERS 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 COPYRIGHT OWNER
* 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.
*/
/*
* Copyright (c) 1982 Jay Fenlason <hack@gnu.org>
* 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. The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED ``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 AUTHOR 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.
*/
#ifndef lint
static const char rcsid[] = "$OpenBSD: hack.termcap.c,v 1.7 2003/05/19 06:30:56 pjanzen Exp $";
#endif /* not lint */
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <termios.h>
#include <curses.h>
#include <term.h>
#include "config.h" /* for ROWNO and COLNO */
#include "hack.h"
static char tbuf[512];
static char *HO, *CL, *CE, *UP, *CM, *ND, *XD, *BC, *SO, *SE, *TI, *TE;
static char *VS, *VE;
static int SG;
static char PC = '\0';
char *CD; /* tested in pri.c: docorner() */
int CO, LI; /* used in pri.c and whatis.c */
static void nocmov(int, int);
static void cmov(int, int);
static int xputc(int);
static void xputs(char *);
void
startup()
{
char *term;
char *tptr;
char *tbufptr, *pc;
tptr = (char *) alloc(1024);
tbufptr = tbuf;
if(!(term = getenv("TERM")))
error("Can't get TERM.");
if(!strncmp(term, "5620", 4))
flags.nonull = 1; /* this should be a termcap flag */
if(tgetent(tptr, term) < 1)
error("Unknown terminal type: %s.", term);
if ((pc = tgetstr("pc", &tbufptr)))
PC = *pc;
if(!(BC = tgetstr("le", &tbufptr))) {
if(!tgetflag("bs"))
error("Terminal must backspace.");
BC = tbufptr;
tbufptr += 2;
*BC = '\b';
}
HO = tgetstr("ho", &tbufptr);
CO = tgetnum("co");
LI = tgetnum("li");
if(CO < COLNO || LI < ROWNO+2)
setclipped();
if(!(CL = tgetstr("cl", &tbufptr)))
error("Hack needs CL.");
ND = tgetstr("nd", &tbufptr);
if(tgetflag("os"))
error("Hack can't have OS.");
CE = tgetstr("ce", &tbufptr);
UP = tgetstr("up", &tbufptr);
/* It seems that xd is no longer supported, and we should use
a linefeed instead; unfortunately this requires resetting
CRMOD, and many output routines will have to be modified
slightly. Let's leave that till the next release. */
XD = tgetstr("xd", &tbufptr);
/* not: XD = tgetstr("do", &tbufptr); */
if(!(CM = tgetstr("cm", &tbufptr))) {
if(!UP && !HO)
error("Hack needs CM or UP or HO.");
printf("Playing hack on terminals without cm is suspect...\n");
getret();
}
SO = tgetstr("so", &tbufptr);
SE = tgetstr("se", &tbufptr);
SG = tgetnum("sg"); /* -1: not fnd; else # of spaces left by so */
if(!SO || !SE || (SG > 0)) SO = SE = 0;
CD = tgetstr("cd", &tbufptr);
set_whole_screen(); /* uses LI and CD */
if(tbufptr-tbuf > sizeof(tbuf)) error("TERMCAP entry too big...\n");
free(tptr);
}
void
start_screen()
{
xputs(TI);
xputs(VS);
}
void
end_screen()
{
xputs(VE);
xputs(TE);
}
/* Cursor movements */
extern xchar curx, cury;
void
curs(int x, int y)
/* int x, y; not xchar: perhaps xchar is unsigned and
curx-x would be unsigned as well */
{
if (y == cury && x == curx)
return;
if(!ND && (curx != x || x <= 3)) { /* Extremely primitive */
cmov(x, y); /* bunker!wtm */
return;
}
if(abs(cury-y) <= 3 && abs(curx-x) <= 3)
nocmov(x, y);
else if((x <= 3 && abs(cury-y)<= 3) || (!CM && x<abs(curx-x))) {
(void) putchar('\r');
curx = 1;
nocmov(x, y);
} else if(!CM) {
nocmov(x, y);
} else
cmov(x, y);
}
static void
nocmov(int x, int y)
{
if (cury > y) {
if(UP) {
while (cury > y) { /* Go up. */
xputs(UP);
cury--;
}
} else if(CM) {
cmov(x, y);
} else if(HO) {
home();
curs(x, y);
} /* else impossible("..."); */
} else if (cury < y) {
if(XD) {
while(cury < y) {
xputs(XD);
cury++;
}
} else if(CM) {
cmov(x, y);
} else {
while(cury < y) {
xputc('\n');
curx = 1;
cury++;
}
}
}
if (curx < x) { /* Go to the right. */
if(!ND) cmov(x, y); else /* bah */
/* should instead print what is there already */
while (curx < x) {
xputs(ND);
curx++;
}
} else if (curx > x) {
while (curx > x) { /* Go to the left. */
xputs(BC);
curx--;
}
}
}
static void
cmov(int x, int y)
{
xputs(tgoto(CM, x-1, y-1));
cury = y;
curx = x;
}
static int
xputc(int c)
{
return fputc(c, stdout);
}
static void
xputs(char *s)
{
tputs(s, 1, xputc);
}
void
cl_end()
{
if(CE)
xputs(CE);
else { /* no-CE fix - free after Harold Rynes */
/* this looks terrible, especially on a slow terminal
but is better than nothing */
int cx = curx, cy = cury;
while(curx < COLNO) {
xputc(' ');
curx++;
}
curs(cx, cy);
}
}
void
clr_screen()
{
xputs(CL);
curx = cury = 1;
}
void
home()
{
if(HO)
xputs(HO);
else if(CM)
xputs(tgoto(CM, 0, 0));
else
curs(1, 1); /* using UP ... */
curx = cury = 1;
}
void
standoutbeg()
{
if(SO) xputs(SO);
}
void
standoutend()
{
if(SE) xputs(SE);
}
void
backsp()
{
xputs(BC);
curx--;
}
void
hackbell()
{
(void) putchar('\007'); /* curx does not change */
(void) fflush(stdout);
}
void
cl_eos() /* free after Robert Viduya */
{ /* must only be called with curx = 1 */
if(CD)
xputs(CD);
else {
int cx = curx, cy = cury;
while(cury <= LI-2) {
cl_end();
xputc('\n');
curx = 1;
cury++;
}
cl_end();
curs(cx, cy);
}
}