ascii tetris!

1 files changed, 312 insertions, 0 deletions

diff --git a/tetris/tetris.c b/tetris/tetris.c
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+/*-
+ * 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. All advertising materials mentioning features or use of this software
+ *    must display the following acknowledgement:
+ *	This product includes software developed by the University of
+ *	California, Berkeley and its contributors.
+ * 4. 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 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/time.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"
+
+void onintr __P((int));
+void usage __P((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()
+{
+	register int i;
+	register cell *p;
+
+	p = board;
+	for (i = B_SIZE; i; i--)
+#ifndef mips
+		*p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
+#else /* work around compiler bug */
+		*p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2 ? 1 : 0;
+#endif
+}
+
+/*
+ * Elide any full active rows.
+ */
+static void
+elide()
+{
+	register int i, j, base;
+	register 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 */
+				bzero(&board[base], B_COLS - 2);
+				scr_update();
+				tsleep();
+				while (--base != 0)
+					board[base + B_COLS] = board[base];
+				scr_update();
+				tsleep();
+				break;
+			}
+		}
+	}
+}
+
+int
+main(argc, argv)
+	int argc;
+	char *argv[];
+{
+	register int pos, c;
+	register struct shape *curshape;
+	register char *keys;
+	register int level = 2;
+	char key_write[6][10];
+	int ch, i, j;
+
+	keys = "jkl pq";
+
+	while ((ch = getopt(argc, argv, "k:l:s")) != EOF)
+		switch(ch) {
+		case 'k':
+			if (strlen(keys = optarg) != 6)
+				usage();
+			break;
+		case 'l':
+			level = atoi(optarg);
+			if (level < MINLEVEL || level > MAXLEVEL) {
+				(void)fprintf(stderr,
+				    "tetris: level must be from %d to %d",
+				    MINLEVEL, MAXLEVEL);
+				exit(1);
+			}
+			break;
+		case 's':
+			showscores(0);
+			exit(0);
+		case '?':
+		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]) {
+				(void)fprintf(stderr,
+				    "%s: Duplicate command keys specified.\n",
+				    argv[0]);
+				exit (1);
+			}
+		}
+		if (keys[i] == ' ')
+			strcpy(key_write[i], "<space>");
+		else {
+			key_write[i][0] = keys[i];
+			key_write[i][1] = '\0';
+		}
+	}
+
+	sprintf(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();
+
+	srandom(getpid());
+	scr_set();
+
+	pos = A_FIRST*B_COLS + (B_COLS/2)-1;
+	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 = 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 */
+			struct shape *new = &shapes[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_clear();
+	scr_end();
+
+	(void)printf("Your score:  %d point%s  x  level %d  =  %d\n",
+	    score, score == 1 ? "" : "s", level, score * level);
+	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(signo)
+	int signo;
+{
+	scr_clear();
+	scr_end();
+	exit(0);
+}
+
+void
+usage()
+{
+	(void)fprintf(stderr, "usage: tetris [-s] [-l level] [-keys]\n");
+	exit(1);
+}