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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[] = "@(#)cards.c 5.5 (Berkeley) 2/28/91";
- #endif /* not lint */
-
- #include <stdio.h>
- #include "deck.h"
-
-
- /*
- * initialize a deck of cards to contain one of each type
- */
-
- makedeck( d )
-
- CARD d[];
- {
- register int i, j, k;
- long time();
-
- i = time( (long *) 0 );
- i = ( (i&0xff) << 8 ) | ( (i >> 8)&0xff ) | 1;
- srand( i );
- k = 0;
- for( i = 0; i < RANKS; i++ ) {
- for( j = 0; j < SUITS; j++ ) {
- d[k].suit = j;
- d[k++].rank = i;
- }
- }
- }
-
-
-
- /*
- * given a deck of cards, shuffle it -- i.e. randomize it
- * see Knuth, vol. 2, page 125
- */
-
- shuffle( d )
-
- CARD d[];
- {
- register int j, k;
- CARD c;
-
- for( j = CARDS; j > 0; --j ) {
- k = ( rand() >> 4 ) % j; /* random 0 <= k < j */
- c = d[j - 1]; /* exchange (j - 1) and k */
- d[j - 1] = d[k];
- d[k] = c;
- }
- }
-
-
-
- /*
- * return true if the two cards are equal...
- */
-
- eq( a, b )
-
- CARD a, b;
- {
- return( ( a.rank == b.rank ) && ( a.suit == b.suit ) );
- }
-
-
-
- /*
- * isone returns TRUE if a is in the set of cards b
- */
-
- isone( a, b, n )
-
- CARD a, b[];
- int n;
- {
- register int i;
-
- for( i = 0; i < n; i++ ) {
- if( eq( a, b[i] ) ) return( TRUE );
- }
- return( FALSE );
- }
-
-
-
- /*
- * remove the card a from the deck d of n cards
- */
-
- cremove( a, d, n )
-
- CARD a, d[];
- int n;
- {
- register int i, j;
-
- j = 0;
- for( i = 0; i < n; i++ ) {
- if( !eq( a, d[i] ) ) d[j++] = d[i];
- }
- if( j < n ) d[j].suit = d[j].rank = EMPTY;
- }
-
-
-
- /*
- * sorthand:
- * Sort a hand of n cards
- */
- sorthand(h, n)
- register CARD h[];
- int n;
- {
- register CARD *cp, *endp;
- CARD c;
-
- for (endp = &h[n]; h < endp - 1; h++)
- for (cp = h + 1; cp < endp; cp++)
- if ((cp->rank < h->rank) ||
- (cp->rank == h->rank && cp->suit < h->suit)) {
- c = *h;
- *h = *cp;
- *cp = c;
- }
- }
-
-