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NetBSD/games/cribbage/score.c

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/* $NetBSD: score.c,v 1.16 2012/10/13 20:36:06 dholland Exp $ */
/*-
* Copyright (c) 1980, 1993
* The 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. 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.
*/
#include <sys/cdefs.h>
#ifndef lint
#if 0
static char sccsid[] = "@(#)score.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: score.c,v 1.16 2012/10/13 20:36:06 dholland Exp $");
#endif
#endif /* not lint */
#include <curses.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include "deck.h"
#include "cribbage.h"
static int fifteens(const CARD [], int);
static int pairuns(const CARD [], int);
/*
* the following arrays give the sum of the scores of the (50 2)*48 = 58800
* hands obtainable for the crib given the two cards whose ranks index the
* array. the two arrays are for the case where the suits are equal and
* not equal respectively
*/
static const long crbescr[169] = {
-10000, 271827, 278883, 332319, 347769, 261129, 250653, 253203, 248259,
243435, 256275, 237435, 231051, -10000, -10000, 412815, 295707, 349497,
267519, 262521, 259695, 254019, 250047, 262887, 244047, 237663, -10000,
-10000, -10000, 333987, 388629, 262017, 266787, 262971, 252729, 254475,
267315, 248475, 242091, -10000, -10000, -10000, -10000, 422097, 302787,
256437, 263751, 257883, 254271, 267111, 248271, 241887, -10000, -10000,
-10000, -10000, -10000, 427677, 387837, 349173, 347985, 423861, 436701,
417861, 411477, -10000, -10000, -10000, -10000, -10000, -10000, 336387,
298851, 338667, 236487, 249327, 230487, 224103, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, 408483, 266691, 229803, 246195, 227355,
220971, -10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000,
300675, 263787, 241695, 226407, 220023, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, -10000, 295635, 273543, 219771, 216939,
-10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000,
-10000, 306519, 252747, 211431, -10000, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, -10000, -10000, 304287, 262971, -10000,
-10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000,
-10000, -10000, 244131, -10000, -10000, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, -10000, -10000, -10000
};
static const long crbnescr[169] = {
325272, 260772, 267828, 321264, 336714, 250074, 239598, 242148, 237204,
232380, 246348, 226380, 219996, -10000, 342528, 401760, 284652, 338442,
256464, 251466, 248640, 242964, 238992, 252960, 232992, 226608, -10000,
-10000, 362280, 322932, 377574, 250962, 255732, 251916, 241674, 243420,
257388, 237420, 231036, -10000, -10000, -10000, 360768, 411042, 291732,
245382, 252696, 246828, 243216, 257184, 237216, 230832, -10000, -10000,
-10000, -10000, 528768, 416622, 376782, 338118, 336930, 412806, 426774,
406806, 400422, -10000, -10000, -10000, -10000, -10000, 369864, 325332,
287796, 327612, 225432, 239400, 219432, 213048, -10000, -10000, -10000,
-10000, -10000, -10000, 359160, 397428, 255636, 218748, 236268, 216300,
209916, -10000, -10000, -10000, -10000, -10000, -10000, -10000, 331320,
289620, 252732, 231768, 215352, 208968, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, 325152, 284580, 263616, 208716, 205884,
-10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000,
321240, 296592, 241692, 200376, -10000, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, -10000, 348600, 294360, 253044, -10000,
-10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000, -10000,
-10000, 308664, 233076, -10000, -10000, -10000, -10000, -10000, -10000,
-10000, -10000, -10000, -10000, -10000, -10000, 295896
};
static const int ichoose2[5] = { 0, 0, 2, 6, 12 };
static int pairpoints, runpoints; /* Globals from pairuns. */
/*
* scorehand:
* Score the given hand of n cards and the starter card.
* n must be <= 4
*/
int
scorehand(const CARD hand[], CARD starter, int n, BOOLEAN crb,
BOOLEAN do_explain)
{
int i, k;
int hscore;
BOOLEAN flag;
CARD h[(CINHAND + 1)];
char buf[32];
explan[0] = '\0'; /* initialize explanation */
hscore = 0;
flag = TRUE;
k = hand[0].suit;
for (i = 0; i < n; i++) { /* check for flush */
flag = (flag && (hand[i].suit == k));
if (hand[i].rank == JACK) /* check for his nibs */
if (hand[i].suit == starter.suit) {
hscore++;
if (do_explain)
strcat(explan, "His Nobs");
}
h[i] = hand[i];
}
if (flag && n >= CINHAND) {
if (do_explain && explan[0] != '\0')
strcat(explan, ", ");
if (starter.suit == k) {
hscore += 5;
if (do_explain)
strcat(explan, "Five-flush");
} else
if (!crb) {
hscore += 4;
if (do_explain && explan[0] != '\0')
strcat(explan, ", Four-flush");
else
strcpy(explan, "Four-flush");
}
}
if (do_explain && explan[0] != '\0')
strcat(explan, ", ");
h[n] = starter;
sorthand(h, n + 1); /* sort by rank */
i = 2 * fifteens(h, n + 1);
hscore += i;
if (do_explain) {
if (i > 0) {
(void) snprintf(buf, sizeof(buf),
"%d points in fifteens", i);
strcat(explan, buf);
} else
strcat(explan, "No fifteens");
}
i = pairuns(h, n + 1);
hscore += i;
if (do_explain) {
if (i > 0) {
(void) snprintf(buf, sizeof(buf),
", %d points in pairs, %d in runs",
pairpoints, runpoints);
strcat(explan, buf);
} else
strcat(explan, ", No pairs/runs");
}
return (hscore);
}
/*
* fifteens:
* Return number of fifteens in hand of n cards
*/
static int
fifteens(const CARD hand[], int n)
{
int *sp, *np;
int i;
const CARD *endp;
static int sums[15], nsums[15];
np = nsums;
sp = sums;
i = 16;
while (--i) {
*np++ = 0;
*sp++ = 0;
}
for (endp = &hand[n]; hand < endp; hand++) {
i = hand->rank + 1;
if (i > 10)
i = 10;
np = &nsums[i];
np[-1]++; /* one way to make this */
sp = sums;
while (i < 15) {
*np++ += *sp++;
i++;
}
sp = sums;
np = nsums;
i = 16;
while (--i)
*sp++ = *np++;
}
return sums[14];
}
/*
* pairuns returns the number of points in the n card sorted hand
* due to pairs and runs
* this routine only works if n is strictly less than 6
* sets the globals pairpoints and runpoints appropriately
*/
static int
pairuns(const CARD h[], int n)
{
int i;
int runlength, runmult, lastmult, curmult;
int mult1, mult2, pair1, pair2;
BOOLEAN run;
run = TRUE;
runlength = 1;
mult1 = 1;
pair1 = -1;
mult2 = 1;
pair2 = -1;
curmult = runmult = 1;
for (i = 1; i < n; i++) {
lastmult = curmult;
if (h[i].rank == h[i - 1].rank) {
if (pair1 < 0) {
pair1 = h[i].rank;
mult1 = curmult = 2;
} else {
if (h[i].rank == pair1) {
curmult = ++mult1;
} else {
if (pair2 < 0) {
pair2 = h[i].rank;
mult2 = curmult = 2;
} else {
curmult = ++mult2;
}
}
}
if (i == (n - 1) && run) {
runmult *= curmult;
}
} else {
curmult = 1;
if (h[i].rank == h[i - 1].rank + 1) {
if (run) {
++runlength;
} else {
/* only if old short */
if (runlength < 3) {
run = TRUE;
runlength = 2;
runmult = 1;
}
}
runmult *= lastmult;
} else {
/* if just ended */
if (run)
runmult *= lastmult;
run = FALSE;
}
}
}
pairpoints = ichoose2[mult1] + ichoose2[mult2];
runpoints = (runlength >= 3 ? runlength * runmult : 0);
return (pairpoints + runpoints);
}
/*
* pegscore tells how many points crd would get if played after
* the n cards in tbl during pegging
*/
int
pegscore(CARD crd, const CARD tbl[], unsigned n, int sum)
{
BOOLEAN got[RANKS];
int i, j, scr;
int k, lo, hi;
unsigned ju;
sum += VAL(crd.rank);
if (sum > 31)
return (-1);
if (sum == 31 || sum == 15)
scr = 2;
else
scr = 0;
if (!n)
return (scr);
ju = 1;
while (ju <= n && crd.rank == tbl[n - ju].rank)
++ju;
if (ju > 1)
return (scr + ichoose2[ju]);
if (n < 2)
return (scr);
lo = hi = crd.rank;
for (i = 0; i < RANKS; i++)
got[i] = FALSE;
got[crd.rank] = TRUE;
k = -1;
for (i = n - 1; i >= 0; --i) {
if (got[tbl[i].rank])
break;
got[tbl[i].rank] = TRUE;
if (tbl[i].rank < lo)
lo = tbl[i].rank;
if (tbl[i].rank > hi)
hi = tbl[i].rank;
for (j = lo; j <= hi; j++)
if (!got[j])
break;
if (j > hi)
k = hi - lo + 1;
}
if (k >= 3)
return (scr + k);
else
return (scr);
}
/*
* adjust takes a two card hand that will be put in the crib
* and returns an adjusted normalized score for the number of
* points such a crib will get.
*/
int
adjust(const CARD cb[], CARD tnv __unused)
{
long scr;
int i, c0, c1;
c0 = cb[0].rank;
c1 = cb[1].rank;
if (c0 > c1) {
i = c0;
c0 = c1;
c1 = i;
}
if (cb[0].suit != cb[1].suit)
scr = crbnescr[RANKS * c0 + c1];
else
scr = crbescr[RANKS * c0 + c1];
if (scr <= 0) {
printf("\nADJUST: internal error %d %d\n", c0, c1);
exit(93);
}
return ((scr + 29400) / 58800);
}
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