minix/games/fish/fish.c

479 lines
10 KiB
C
Raw Normal View History

/* $NetBSD: fish.c,v 1.22 2011/09/01 07:18:50 plunky Exp $ */
/*-
* Copyright (c) 1990, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Muffy Barkocy.
*
* 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
__COPYRIGHT("@(#) Copyright (c) 1990, 1993\
The Regents of the University of California. All rights reserved.");
#endif /* not lint */
#ifndef lint
#if 0
static char sccsid[] = "@(#)fish.c 8.1 (Berkeley) 5/31/93";
#else
__RCSID("$NetBSD: fish.c,v 1.22 2011/09/01 07:18:50 plunky Exp $");
#endif
#endif /* not lint */
#include <sys/types.h>
#include <sys/wait.h>
#include <errno.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include <string.h>
#include <time.h>
#include <err.h>
#include "pathnames.h"
#define RANKS 13
#define HANDSIZE 7
#define CARDS 4
#define TOTCARDS RANKS * CARDS
#define USER 1
#define COMPUTER 0
#define OTHER(a) (1 - (a))
static const char *const cards[] = {
"A", "2", "3", "4", "5", "6", "7",
"8", "9", "10", "J", "Q", "K", NULL,
};
#define PRC(card) (void)printf(" %s", cards[card])
static int promode;
static int asked[RANKS], comphand[RANKS], deck[TOTCARDS];
static int userasked[RANKS], userhand[RANKS];
static int curcard = TOTCARDS;
static void chkwinner(int, const int *);
static int compmove(void);
static int countbooks(const int *);
static int countcards(const int *);
static int drawcard(int, int *);
static int gofish(int, int, int *);
static void goodmove(int, int, int *, int *);
static void init(void);
static void instructions(void);
static int nrandom(int);
static void printhand(const int *);
static void printplayer(int);
static int promove(void);
static void usage(void) __dead;
static int usermove(void);
int
main(int argc, char **argv)
{
int ch, move;
/* Revoke setgid privileges */
setgid(getgid());
while ((ch = getopt(argc, argv, "p")) != -1)
switch(ch) {
case 'p':
promode = 1;
break;
case '?':
default:
usage();
}
srandom(time(NULL));
instructions();
init();
if (nrandom(2) == 1) {
printplayer(COMPUTER);
(void)printf("get to start.\n");
goto istart;
}
printplayer(USER);
(void)printf("get to start.\n");
for (;;) {
move = usermove();
if (!comphand[move]) {
if (gofish(move, USER, userhand))
continue;
} else {
goodmove(USER, move, userhand, comphand);
continue;
}
istart: for (;;) {
move = compmove();
if (!userhand[move]) {
if (!gofish(move, COMPUTER, comphand))
break;
} else
goodmove(COMPUTER, move, comphand, userhand);
}
}
/* NOTREACHED */
}
static int
usermove(void)
{
int n;
const char *const *p;
char buf[256];
(void)printf("\nYour hand is:");
printhand(userhand);
for (;;) {
(void)printf("You ask me for: ");
(void)fflush(stdout);
if (fgets(buf, sizeof(buf), stdin) == NULL)
exit(0);
if (buf[0] == '\0')
continue;
if (buf[0] == '\n') {
(void)printf("%d cards in my hand, %d in the pool.\n",
countcards(comphand), curcard);
(void)printf("My books:");
(void)countbooks(comphand);
continue;
}
buf[strlen(buf) - 1] = '\0';
if (!strcasecmp(buf, "p") && !promode) {
promode = 1;
(void)printf("Entering pro mode.\n");
continue;
}
if (!strcasecmp(buf, "quit"))
exit(0);
for (p = cards; *p; ++p)
if (!strcasecmp(*p, buf))
break;
if (!*p) {
(void)printf("I don't understand!\n");
continue;
}
n = p - cards;
if (userhand[n]) {
userasked[n] = 1;
return(n);
}
if (nrandom(3) == 1)
(void)printf("You don't have any of those!\n");
else
(void)printf("You don't have any %s's!\n", cards[n]);
if (nrandom(4) == 1)
(void)printf("No cheating!\n");
(void)printf("Guess again.\n");
}
/* NOTREACHED */
}
static int
compmove(void)
{
static int lmove;
if (promode)
lmove = promove();
else {
do {
lmove = (lmove + 1) % RANKS;
} while (!comphand[lmove] || comphand[lmove] == CARDS);
}
asked[lmove] = 1;
(void)printf("I ask you for: %s.\n", cards[lmove]);
return(lmove);
}
static int
promove(void)
{
int i, max;
for (i = 0; i < RANKS; ++i)
if (userasked[i] &&
comphand[i] > 0 && comphand[i] < CARDS) {
userasked[i] = 0;
return(i);
}
if (nrandom(3) == 1) {
for (i = 0;; ++i)
if (comphand[i] && comphand[i] != CARDS) {
max = i;
break;
}
while (++i < RANKS)
if (comphand[i] != CARDS &&
comphand[i] > comphand[max])
max = i;
return(max);
}
if (nrandom(1024) == 0723) {
for (i = 0; i < RANKS; ++i)
if (userhand[i] && comphand[i])
return(i);
}
for (;;) {
for (i = 0; i < RANKS; ++i)
if (comphand[i] && comphand[i] != CARDS &&
!asked[i])
return(i);
for (i = 0; i < RANKS; ++i)
asked[i] = 0;
}
/* NOTREACHED */
}
static int
drawcard(int player, int *hand)
{
int card;
++hand[card = deck[--curcard]];
if (player == USER || hand[card] == CARDS) {
printplayer(player);
(void)printf("drew %s", cards[card]);
if (hand[card] == CARDS) {
(void)printf(" and made a book of %s's!\n",
cards[card]);
chkwinner(player, hand);
} else
(void)printf(".\n");
}
return(card);
}
static int
gofish(int askedfor, int player, int *hand)
{
printplayer(OTHER(player));
(void)printf("say \"GO FISH!\"\n");
if (askedfor == drawcard(player, hand)) {
printplayer(player);
(void)printf("drew the guess!\n");
printplayer(player);
(void)printf("get to ask again!\n");
return(1);
}
return(0);
}
static void
goodmove(int player, int move, int *hand, int *opphand)
{
printplayer(OTHER(player));
(void)printf("have %d %s%s.\n",
opphand[move], cards[move], opphand[move] == 1 ? "": "'s");
hand[move] += opphand[move];
opphand[move] = 0;
if (hand[move] == CARDS) {
printplayer(player);
(void)printf("made a book of %s's!\n", cards[move]);
chkwinner(player, hand);
}
chkwinner(OTHER(player), opphand);
printplayer(player);
(void)printf("get another guess!\n");
}
static void
chkwinner(int player, const int *hand)
{
int cb, i, ub;
for (i = 0; i < RANKS; ++i)
if (hand[i] > 0 && hand[i] < CARDS)
return;
printplayer(player);
(void)printf("don't have any more cards!\n");
(void)printf("My books:");
cb = countbooks(comphand);
(void)printf("Your books:");
ub = countbooks(userhand);
(void)printf("\nI have %d, you have %d.\n", cb, ub);
if (ub > cb) {
(void)printf("\nYou win!!!\n");
if (nrandom(1024) == 0723)
(void)printf("Cheater, cheater, pumpkin eater!\n");
} else if (cb > ub) {
(void)printf("\nI win!!!\n");
if (nrandom(1024) == 0723)
(void)printf("Hah! Stupid peasant!\n");
} else
(void)printf("\nTie!\n");
exit(0);
}
static void
printplayer(int player)
{
switch (player) {
case COMPUTER:
(void)printf("I ");
break;
case USER:
(void)printf("You ");
break;
}
}
static void
printhand(const int *hand)
{
int book, i, j;
for (book = i = 0; i < RANKS; i++)
if (hand[i] < CARDS)
for (j = hand[i]; --j >= 0;)
PRC(i);
else
++book;
if (book) {
(void)printf(" + Book%s of", book > 1 ? "s" : "");
for (i = 0; i < RANKS; i++)
if (hand[i] == CARDS)
PRC(i);
}
(void)putchar('\n');
}
static int
countcards(const int *hand)
{
int i, count;
for (count = i = 0; i < RANKS; i++)
count += *hand++;
return(count);
}
static int
countbooks(const int *hand)
{
int i, count;
for (count = i = 0; i < RANKS; i++)
if (hand[i] == CARDS) {
++count;
PRC(i);
}
if (!count)
(void)printf(" none");
(void)putchar('\n');
return(count);
}
static void
init(void)
{
int i, j, temp;
for (i = 0; i < TOTCARDS; ++i)
deck[i] = i % RANKS;
for (i = 0; i < TOTCARDS - 1; ++i) {
j = nrandom(TOTCARDS-i);
if (j == 0)
continue;
temp = deck[i];
deck[i] = deck[i+j];
deck[i+j] = temp;
}
for (i = 0; i < HANDSIZE; ++i) {
++userhand[deck[--curcard]];
++comphand[deck[--curcard]];
}
}
static int
nrandom(int n)
{
return((int)random() % n);
}
static void
instructions(void)
{
int input;
pid_t pid;
int fd;
const char *pager;
int status;
(void)printf("Would you like instructions (y or n)? ");
input = getchar();
while (getchar() != '\n');
if (input != 'y')
return;
switch (pid = fork()) {
case 0: /* child */
if (!isatty(1))
pager = "cat";
else {
if (!(pager = getenv("PAGER")) || (*pager == 0))
pager = _PATH_MORE;
}
if ((fd = open(_PATH_INSTR, O_RDONLY)) == -1)
err(1, "open %s", _PATH_INSTR);
if (dup2(fd, 0) == -1)
err(1, "dup2");
(void)execl("/bin/sh", "sh", "-c", pager, (char *) NULL);
err(1, "exec sh -c %s", pager);
/*NOTREACHED*/
case -1:
err(1, "fork");
/*NOTREACHED*/
default:
(void)waitpid(pid, &status, 0);
break;
}
(void)printf("Hit return to continue...\n");
while ((input = getchar()) != EOF && input != '\n');
}
static void
usage(void)
{
(void)fprintf(stderr, "usage: fish [-p]\n");
exit(1);
}