NetBSD/games/backgammon/common_source/check.c

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/*
* Copyright (c) 1980 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. All advertising materials mentioning features or use of this software
* must display the following acknowledgement:
* This product includes software developed by the University of
* California, Berkeley and its contributors.
* 4. 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.
*/
#ifndef lint
static char sccsid[] = "@(#)check.c 5.4 (Berkeley) 6/1/90";
#endif /* not lint */
#include "back.h"
getmove () {
register int i, c;
c = 0;
for (;;) {
i = checkmove(c);
switch (i) {
case -1:
if (movokay(mvlim)) {
if (tflag)
curmove (20,0);
else
writec ('\n');
for (i = 0; i < mvlim; i++)
if (h[i])
wrhit(g[i]);
nexturn();
if (*offopp == 15)
cturn *= -2;
if (tflag && pnum)
bflag = pnum;
return;
}
case -4:
case 0:
if (tflag)
refresh();
if (i != 0 && i != -4)
break;
if (tflag)
curmove (20,0);
else
writec ('\n');
writel (*Colorptr);
if (i == -4)
writel (" must make ");
else
writel (" can only make ");
writec (mvlim+'0');
writel (" move");
if (mvlim > 1)
writec ('s');
writec ('.');
writec ('\n');
break;
case -3:
if (quit())
return;
}
if (! tflag)
proll ();
else {
curmove (cturn == -1? 18: 19,39);
cline ();
c = -1;
}
}
}
movokay (mv)
register int mv;
{
register int i, m;
if (d0)
swap;
for (i = 0; i < mv; i++) {
if (p[i] == g[i]) {
moverr (i);
curmove (20,0);
writel ("Attempt to move to same location.\n");
return (0);
}
if (cturn*(g[i]-p[i]) < 0) {
moverr (i);
curmove (20,0);
writel ("Backwards move.\n");
return (0);
}
if (abs(board[bar]) && p[i] != bar) {
moverr (i);
curmove (20,0);
writel ("Men still on bar.\n");
return (0);
}
if ( (m = makmove(i)) ) {
moverr (i);
switch (m) {
case 1:
writel ("Move not rolled.\n");
break;
case 2:
writel ("Bad starting position.\n");
break;
case 3:
writel ("Destination occupied.\n");
break;
case 4:
writel ("Can't remove men yet.\n");
}
return (0);
}
}
return (1);
}