Clean up:
[dragonfly.git] / games / cribbage / cards.c
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1/*-
2 * Copyright (c) 1980, 1993
3 * The Regents of the University of California. All rights reserved.
4 *
5 * Redistribution and use in source and binary forms, with or without
6 * modification, are permitted provided that the following conditions
7 * are met:
8 * 1. Redistributions of source code must retain the above copyright
9 * notice, this list of conditions and the following disclaimer.
10 * 2. Redistributions in binary form must reproduce the above copyright
11 * notice, this list of conditions and the following disclaimer in the
12 * documentation and/or other materials provided with the distribution.
13 * 3. All advertising materials mentioning features or use of this software
14 * must display the following acknowledgement:
15 * This product includes software developed by the University of
16 * California, Berkeley and its contributors.
17 * 4. Neither the name of the University nor the names of its contributors
18 * may be used to endorse or promote products derived from this software
19 * without specific prior written permission.
20 *
21 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
22 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
23 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
24 * ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
25 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
26 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
27 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
28 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
29 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
30 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
31 * SUCH DAMAGE.
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32 *
33 * @(#)cards.c 8.1 (Berkeley) 5/31/93
34 * $FreeBSD: src/games/cribbage/cards.c,v 1.5 1999/11/30 03:48:44 billf Exp $
35 * $DragonFly: src/games/cribbage/cards.c,v 1.2 2003/06/17 04:25:23 dillon Exp $
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36 */
37
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38#include <curses.h>
39#include <stdio.h>
40#include <stdlib.h>
41#include <time.h>
42
43#include "deck.h"
44#include "cribbage.h"
45
46
47/*
48 * Initialize a deck of cards to contain one of each type.
49 */
50void
51makedeck(d)
52 CARD d[];
53{
54 int i, j, k;
55
56 srandomdev();
57 k = 0;
58 for (i = 0; i < RANKS; i++)
59 for (j = 0; j < SUITS; j++) {
60 d[k].suit = j;
61 d[k++].rank = i;
62 }
63}
64
65/*
66 * Given a deck of cards, shuffle it -- i.e. randomize it
67 * see Knuth, vol. 2, page 125.
68 */
69void
70shuffle(d)
71 CARD d[];
72{
73 int j, k;
74 CARD c;
75
76 for (j = CARDS; j > 0; --j) {
77 k = random() % j; /* random 0 <= k < j */
78 c = d[j - 1]; /* exchange (j - 1) and k */
79 d[j - 1] = d[k];
80 d[k] = c;
81 }
82}
83
84/*
85 * return true if the two cards are equal...
86 */
87int
88eq(a, b)
89 CARD a, b;
90{
91 return ((a.rank == b.rank) && (a.suit == b.suit));
92}
93
94/*
95 * isone returns TRUE if a is in the set of cards b
96 */
97int
98isone(a, b, n)
99 CARD a, b[];
100 int n;
101{
102 int i;
103
104 for (i = 0; i < n; i++)
105 if (eq(a, b[i]))
106 return (TRUE);
107 return (FALSE);
108}
109
110/*
111 * remove the card a from the deck d of n cards
112 */
113void
114cremove(a, d, n)
115 CARD a, d[];
116 int n;
117{
118 int i, j;
119
120 for (i = j = 0; i < n; i++)
121 if (!eq(a, d[i]))
122 d[j++] = d[i];
123 if (j < n)
124 d[j].suit = d[j].rank = EMPTY;
125}
126
127/*
128 * sorthand:
129 * Sort a hand of n cards
130 */
131void
132sorthand(h, n)
133 CARD h[];
134 int n;
135{
136 CARD *cp, *endp;
137 CARD c;
138
139 for (endp = &h[n]; h < endp - 1; h++)
140 for (cp = h + 1; cp < endp; cp++)
141 if ((cp->rank < h->rank) ||
142 (cp->rank == h->rank && cp->suit < h->suit)) {
143 c = *h;
144 *h = *cp;
145 *cp = c;
146 }
147}