334 lines
7.0 KiB
C
334 lines
7.0 KiB
C
/* $NetBSD: tetris.c,v 1.22 2009/08/12 08:51:21 dholland Exp $ */
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/*-
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* Copyright (c) 1992, 1993
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* The Regents of the University of California. All rights reserved.
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*
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* This code is derived from software contributed to Berkeley by
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* Chris Torek and Darren F. Provine.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. Neither the name of the University nor the names of its contributors
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* may be used to endorse or promote products derived from this software
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* without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
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* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
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* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
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* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
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* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
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* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
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* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
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* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
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* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
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* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
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* SUCH DAMAGE.
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*
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* @(#)tetris.c 8.1 (Berkeley) 5/31/93
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*/
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#include <sys/cdefs.h>
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#ifndef lint
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__COPYRIGHT("@(#) Copyright (c) 1992, 1993\
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The Regents of the University of California. All rights reserved.");
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#endif /* not lint */
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/*
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* Tetris (or however it is spelled).
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*/
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#include <sys/time.h>
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#include <err.h>
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#include <fcntl.h>
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#include <signal.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <unistd.h>
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#include "input.h"
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#include "scores.h"
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#include "screen.h"
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#include "tetris.h"
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cell board[B_SIZE]; /* 1 => occupied, 0 => empty */
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int Rows, Cols; /* current screen size */
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static const struct shape *curshape;
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const struct shape *nextshape;
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long fallrate; /* less than 1 million; smaller => faster */
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int score; /* the obvious thing */
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gid_t gid, egid;
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char key_msg[100];
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int showpreview;
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static void elide(void);
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static void setup_board(void);
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static void onintr(int) __dead;
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static void usage(void) __dead;
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/*
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* Set up the initial board. The bottom display row is completely set,
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* along with another (hidden) row underneath that. Also, the left and
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* right edges are set.
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*/
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static void
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setup_board(void)
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{
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int i;
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cell *p;
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p = board;
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for (i = B_SIZE; i; i--)
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*p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
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}
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/*
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* Elide any full active rows.
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*/
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static void
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elide(void)
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{
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int i, j, base;
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cell *p;
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for (i = A_FIRST; i < A_LAST; i++) {
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base = i * B_COLS + 1;
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p = &board[base];
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for (j = B_COLS - 2; *p++ != 0;) {
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if (--j <= 0) {
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/* this row is to be elided */
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memset(&board[base], 0, B_COLS - 2);
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scr_update();
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tsleep();
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while (--base != 0)
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board[base + B_COLS] = board[base];
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scr_update();
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tsleep();
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break;
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}
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}
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}
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}
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int
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main(int argc, char *argv[])
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{
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int pos, c;
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const char *keys;
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int level = 2;
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char key_write[6][10];
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int ch, i, j;
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int fd;
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gid = getgid();
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egid = getegid();
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setegid(gid);
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fd = open("/dev/null", O_RDONLY);
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if (fd < 3)
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exit(1);
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close(fd);
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keys = "jkl pq";
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while ((ch = getopt(argc, argv, "k:l:ps")) != -1)
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switch(ch) {
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case 'k':
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if (strlen(keys = optarg) != 6)
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usage();
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break;
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case 'l':
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level = atoi(optarg);
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if (level < MINLEVEL || level > MAXLEVEL) {
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errx(1, "level must be from %d to %d",
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MINLEVEL, MAXLEVEL);
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}
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break;
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case 'p':
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showpreview = 1;
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break;
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case 's':
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showscores(0);
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exit(0);
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case '?':
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default:
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usage();
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}
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argc -= optind;
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argv += optind;
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if (argc)
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usage();
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fallrate = 1000000 / level;
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for (i = 0; i <= 5; i++) {
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for (j = i+1; j <= 5; j++) {
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if (keys[i] == keys[j]) {
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errx(1, "duplicate command keys specified.");
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}
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}
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if (keys[i] == ' ')
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strcpy(key_write[i], "<space>");
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else {
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key_write[i][0] = keys[i];
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key_write[i][1] = '\0';
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}
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}
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snprintf(key_msg, sizeof(key_msg),
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"%s - left %s - rotate %s - right %s - drop %s - pause %s - quit",
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key_write[0], key_write[1], key_write[2], key_write[3],
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key_write[4], key_write[5]);
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(void)signal(SIGINT, onintr);
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scr_init();
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setup_board();
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srandom(getpid());
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scr_set();
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pos = A_FIRST*B_COLS + (B_COLS/2)-1;
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nextshape = randshape();
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curshape = randshape();
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scr_msg(key_msg, 1);
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for (;;) {
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place(curshape, pos, 1);
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scr_update();
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place(curshape, pos, 0);
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c = tgetchar();
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if (c < 0) {
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/*
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* Timeout. Move down if possible.
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*/
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if (fits_in(curshape, pos + B_COLS)) {
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pos += B_COLS;
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continue;
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}
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/*
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* Put up the current shape `permanently',
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* bump score, and elide any full rows.
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*/
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place(curshape, pos, 1);
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score++;
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elide();
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/*
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* Choose a new shape. If it does not fit,
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* the game is over.
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*/
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curshape = nextshape;
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nextshape = randshape();
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pos = A_FIRST*B_COLS + (B_COLS/2)-1;
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if (!fits_in(curshape, pos))
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break;
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continue;
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}
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/*
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* Handle command keys.
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*/
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if (c == keys[5]) {
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/* quit */
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break;
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}
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if (c == keys[4]) {
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static char msg[] =
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"paused - press RETURN to continue";
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place(curshape, pos, 1);
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do {
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scr_update();
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scr_msg(key_msg, 0);
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scr_msg(msg, 1);
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(void) fflush(stdout);
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} while (rwait((struct timeval *)NULL) == -1);
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scr_msg(msg, 0);
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scr_msg(key_msg, 1);
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place(curshape, pos, 0);
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continue;
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}
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if (c == keys[0]) {
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/* move left */
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if (fits_in(curshape, pos - 1))
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pos--;
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continue;
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}
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if (c == keys[1]) {
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/* turn */
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const struct shape *new = &shapes[curshape->rot];
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if (fits_in(new, pos))
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curshape = new;
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continue;
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}
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if (c == keys[2]) {
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/* move right */
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if (fits_in(curshape, pos + 1))
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pos++;
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continue;
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}
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if (c == keys[3]) {
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/* move to bottom */
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while (fits_in(curshape, pos + B_COLS)) {
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pos += B_COLS;
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score++;
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}
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continue;
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}
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if (c == '\f') {
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scr_clear();
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scr_msg(key_msg, 1);
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}
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}
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scr_clear();
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scr_end();
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(void)printf("Your score: %d point%s x level %d = %d\n",
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score, score == 1 ? "" : "s", level, score * level);
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savescore(level);
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printf("\nHit RETURN to see high scores, ^C to skip.\n");
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while ((i = getchar()) != '\n')
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if (i == EOF)
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break;
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showscores(level);
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exit(0);
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}
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static void
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onintr(int signo __unused)
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{
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scr_clear();
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scr_end();
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exit(0);
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}
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static void
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usage(void)
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{
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(void)fprintf(stderr, "usage: tetris [-ps] [-k keys] [-l level]\n");
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exit(1);
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}
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