OpenBSD-4.6/games/tetris/tetris.c
/* $OpenBSD: tetris.c,v 1.22 2008/03/17 09:17:56 sobrado Exp $ */
/* $NetBSD: tetris.c,v 1.2 1995/04/22 07:42:47 cgd Exp $ */
/*-
* Copyright (c) 1992, 1993
* The Regents of the University of California. All rights reserved.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek and Darren F. Provine.
*
* 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.
*
* @(#)tetris.c 8.1 (Berkeley) 5/31/93
*/
#ifndef lint
static const char copyright[] =
"@(#) Copyright (c) 1992, 1993\n\
The Regents of the University of California. All rights reserved.\n";
#endif /* not lint */
/*
* Tetris (or however it is spelled).
*/
#include <sys/param.h>
#include <sys/time.h>
#include <sys/types.h>
#include <err.h>
#include <signal.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <unistd.h>
#include "input.h"
#include "scores.h"
#include "screen.h"
#include "tetris.h"
cell board[B_SIZE];
int Rows, Cols;
const struct shape *curshape;
const struct shape *nextshape;
long fallrate;
int score;
gid_t gid, egid;
char key_msg[100];
int showpreview, classic;
static void elide(void);
static void setup_board(void);
const struct shape *randshape(void);
void onintr(int);
void usage(void);
/*
* Set up the initial board. The bottom display row is completely set,
* along with another (hidden) row underneath that. Also, the left and
* right edges are set.
*/
static void
setup_board(void)
{
int i;
cell *p;
p = board;
for (i = B_SIZE; i; i--)
*p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
}
/*
* Elide any full active rows.
*/
static void
elide(void)
{
int rows = 0;
int i, j, base;
cell *p;
for (i = A_FIRST; i < A_LAST; i++) {
base = i * B_COLS + 1;
p = &board[base];
for (j = B_COLS - 2; *p++ != 0;) {
if (--j <= 0) {
/* this row is to be elided */
rows++;
memset(&board[base], 0, B_COLS - 2);
scr_update();
tsleep();
while (--base != 0)
board[base + B_COLS] = board[base];
scr_update();
tsleep();
break;
}
}
}
switch (rows) {
case 1:
score += 10;
break;
case 2:
score += 30;
break;
case 3:
score += 70;
break;
case 4:
score += 150;
break;
default:
break;
}
}
const struct shape *
randshape(void)
{
const struct shape *tmp;
int i, j;
tmp = &shapes[random() % 7];
j = random() % 4;
for (i = 0; i < j; i++)
tmp = &shapes[classic? tmp->rotc : tmp->rot];
return (tmp);
}
int
main(int argc, char *argv[])
{
int pos, c;
char *keys;
int level = 2;
char key_write[6][10];
const char *errstr;
int ch, i, j;
keys = "jkl pq";
gid = getgid();
egid = getegid();
setegid(gid);
classic = showpreview = 0;
while ((ch = getopt(argc, argv, "ck:l:ps")) != -1)
switch(ch) {
case 'c':
/*
* this means:
* - rotate the other way;
* - no reverse video.
*/
classic = 1;
break;
case 'k':
if (strlen(keys = optarg) != 6)
usage();
break;
case 'l':
level = (int)strtonum(optarg, MINLEVEL, MAXLEVEL,
&errstr);
if (errstr)
errx(1, "level must be from %d to %d",
MINLEVEL, MAXLEVEL);
break;
case 'p':
showpreview = 1;
break;
case 's':
showscores(0);
exit(0);
default:
usage();
}
argc -= optind;
argv += optind;
if (argc)
usage();
fallrate = 1000000 / level;
for (i = 0; i <= 5; i++) {
for (j = i+1; j <= 5; j++) {
if (keys[i] == keys[j])
errx(1, "duplicate command keys specified.");
}
if (keys[i] == ' ')
strlcpy(key_write[i], "<space>", sizeof key_write[i]);
else {
key_write[i][0] = keys[i];
key_write[i][1] = '\0';
}
}
snprintf(key_msg, sizeof key_msg,
"%s - left %s - rotate %s - right %s - drop %s - pause %s - quit",
key_write[0], key_write[1], key_write[2], key_write[3],
key_write[4], key_write[5]);
(void)signal(SIGINT, onintr);
scr_init();
setup_board();
srandomdev();
scr_set();
pos = A_FIRST*B_COLS + (B_COLS/2)-1;
nextshape = randshape();
curshape = randshape();
scr_msg(key_msg, 1);
for (;;) {
place(curshape, pos, 1);
scr_update();
place(curshape, pos, 0);
c = tgetchar();
if (c < 0) {
/*
* Timeout. Move down if possible.
*/
if (fits_in(curshape, pos + B_COLS)) {
pos += B_COLS;
continue;
}
/*
* Put up the current shape `permanently',
* bump score, and elide any full rows.
*/
place(curshape, pos, 1);
score++;
elide();
/*
* Choose a new shape. If it does not fit,
* the game is over.
*/
curshape = nextshape;
nextshape = randshape();
pos = A_FIRST*B_COLS + (B_COLS/2)-1;
if (!fits_in(curshape, pos))
break;
continue;
}
/*
* Handle command keys.
*/
if (c == keys[5]) {
/* quit */
break;
}
if (c == keys[4]) {
static char msg[] =
"paused - press RETURN to continue";
place(curshape, pos, 1);
do {
scr_update();
scr_msg(key_msg, 0);
scr_msg(msg, 1);
(void) fflush(stdout);
} while (rwait((struct timeval *)NULL) == -1);
scr_msg(msg, 0);
scr_msg(key_msg, 1);
place(curshape, pos, 0);
continue;
}
if (c == keys[0]) {
/* move left */
if (fits_in(curshape, pos - 1))
pos--;
continue;
}
if (c == keys[1]) {
/* turn */
const struct shape *new = &shapes[
classic? curshape->rotc : curshape->rot];
if (fits_in(new, pos))
curshape = new;
continue;
}
if (c == keys[2]) {
/* move right */
if (fits_in(curshape, pos + 1))
pos++;
continue;
}
if (c == keys[3]) {
/* move to bottom */
while (fits_in(curshape, pos + B_COLS)) {
pos += B_COLS;
score++;
}
continue;
}
if (c == '\f') {
scr_clear();
scr_msg(key_msg, 1);
}
}
scr_clear();
scr_end();
if (showpreview == 0)
(void)printf("Your score: %d point%s x level %d = %d\n",
score, score == 1 ? "" : "s", level, score * level);
else {
(void)printf("Your score: %d point%s x level %d x preview penalty %0.3f = %d\n",
score, score == 1 ? "" : "s", level, (double)PRE_PENALTY,
(int)(score * level * PRE_PENALTY));
score = score * PRE_PENALTY;
}
savescore(level);
printf("\nHit RETURN to see high scores, ^C to skip.\n");
while ((i = getchar()) != '\n')
if (i == EOF)
break;
showscores(level);
exit(0);
}
void
onintr(int signo)
{
scr_clear(); /* XXX signal race */
scr_end(); /* XXX signal race */
_exit(0);
}
void
usage(void)
{
(void)fprintf(stderr, "usage: tetris [-cps] [-k keys] [-l level]\n");
exit(1);
}