/*
* Copyright (c) 2011 Martin Decky
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions
* are met:
*
* - Redistributions of source code must retain the above copyright
* notice, this list of conditions and the following disclaimer.
* - 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.
* - The name of the author may not be used to endorse or promote products
* derived from this software without specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``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 AUTHOR 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.
*/
/** Attributations
*
* tetris.c 8.1 (Berkeley) 5/31/93
* NetBSD: tetris.c,v 1.2 1995/04/22 07:42:47 cgd
* OpenBSD: tetris.c,v 1.21 2006/04/20 03:24:12 ray
*
* Based upon BSD Tetris
*
* Copyright (c) 1992, 1993
* The Regents of the University of California.
* Distributed under BSD license.
*
* This code is derived from software contributed to Berkeley by
* Chris Torek and Darren F. Provine.
*
*/
/** @addtogroup tetris Tetris
* @brief Tetris ported from OpenBSD
* @{
*/
/** @file
*/
static volatile const char copyright[] =
"@(#) Copyright (c) 1992, 1993\n"
"\tThe Regents of the University of California. All rights reserved.\n";
#include <time.h>
#include <err.h>
#include <errno.h>
#include <stdbool.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <str.h>
#include <getopt.h>
#include "scores.h"
#include "screen.h"
#include "tetris.h"
cell board[B_SIZE];
int Rows;
int Cols;
const struct shape *curshape;
const struct shape *nextshape;
long fallrate;
int score;
char key_msg[100];
int showpreview;
int classic;
static void elide(void);
static void setup_board(void);
static const struct shape *randshape(void);
static void usage(void);
static int firstgame = 1;
/*
* 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 = board;
for (i = B_SIZE; i; i--)
*p++ = (i <= (2 * B_COLS) || (i % B_COLS) < 2) ? 0x0000ff : 0x000000;
}
/*
* Elide any full active rows.
*/
static void elide(void)
{
int rows = 0;
int i;
int j;
int base;
cell *p;
for (i = A_FIRST; i < A_LAST; i++) {
base = i * B_COLS + 1;
p = &board[base];
j = B_COLS - 2;
while (*p++ != 0) {
if (--j <= 0) {
/* This row is to be elided */
rows++;
memset(&board[base], 0, sizeof(cell) * (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 = &shapes[rand() % 7];
int i;
int j = rand() % 4;
for (i = 0; i < j; i++)
tmp = &shapes[classic ? tmp->rotc : tmp->rot];
return (tmp);
}
static void srandomdev(void)
{
struct timespec ts;
getuptime(&ts);
srand(tv.tv_sec + tv.tv_nsec / 100000000);
}
static void tetris_menu_draw(int level)
{
clear_screen();
moveto(5, 10);
puts("Tetris\n");
moveto(8, 10);
printf("Level = %d (press keys 1 - 9 to change)", level);
moveto(9, 10);
printf("Preview is %s (press 'p' to change)", (showpreview ? "on " : "off"));
moveto(12, 10);
printf("Press 'h' to show hiscore table.");
moveto(13, 10);
printf("Press 's' to start game.");
moveto(14, 10);
printf("Press 'q' to quit game.");
moveto(20, 10);
printf("In game controls:");
moveto(21, 0);
puts(key_msg);
}
static int tetris_menu(int *level)
{
tetris_menu_draw(*level);
while (true) {
int i = getchar();
switch (i) {
case 'p':
showpreview = !showpreview;
moveto(9, 21);
if (showpreview)
printf("on ");
else
printf("off");
break;
case 'h':
loadscores();
showscores(firstgame);
tetris_menu_draw(*level);
break;
case 's':
firstgame = 0;
return 1;
case 'q':
return 0;
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
*level = i - '0';
moveto(8, 18);
printf("%d", *level);
break;
}
}
}
int main(int argc, char *argv[])
{
int pos;
int c;
const char *keys;
int level = 2;
char key_write[6][10];
int i;
int j;
int ch;
console = console_init(stdin, stdout);
keys = "jkl pq";
classic = 0;
showpreview = 1;
while ((ch = getopt(argc, argv, "ck:ps")) != -1)
switch (ch) {
case 'c':
/*
* this means:
* - rotate the other way
* - no reverse video
*/
classic = 1;
break;
case 'k':
if (str_size(keys = optarg) != 6)
usage();
break;
case 'p':
showpreview = 1;
break;
case 's':
showscores(0);
exit(0);
default:
usage();
}
argc -= optind;
argv += optind;
if (argc)
usage();
for (i = 0; i <= 5; i++) {
for (j = i + 1; j <= 5; j++) {
if (keys[i] == keys[j])
errx(1, "%s", "duplicate command keys specified.");
}
if (keys[i] == ' ')
str_cpy(key_write[i], sizeof(key_write[i]), "<space>");
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]);
scr_init();
if (loadscores() != EOK)
initscores();
while (tetris_menu(&level)) {
fallrate = 1000000 / level;
scr_clear();
setup_board();
srandomdev();
scr_set();
pos = A_FIRST * B_COLS + (B_COLS / 2) - 1;
nextshape = randshape();
curshape = randshape();
scr_msg(key_msg, 1);
while (true) {
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);
console_flush(console);
} while (!twait());
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();
loadscores();
insertscore(score, level);
savescores();
score = 0;
}
scr_clear();
printf("\nGame over.\n");
scr_end();
return 0;
}
void usage(void)
{
fprintf(stderr, "usage: tetris [-ps] [-k keys]\n");
exit(1);
}
/** @}
*/