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  1. /*  $OpenBSD: tetris.c,v 1.21 2006/04/20 03:24:12 ray Exp $ */
  2. /*  $NetBSD: tetris.c,v 1.2 1995/04/22 07:42:47 cgd Exp $   */
  3.  
  4. /*-
  5.  * Copyright (c) 1992, 1993
  6.  *  The Regents of the University of California.  All rights reserved.
  7.  *
  8.  * This code is derived from software contributed to Berkeley by
  9.  * Chris Torek and Darren F. Provine.
  10.  *
  11.  * Redistribution and use in source and binary forms, with or without
  12.  * modification, are permitted provided that the following conditions
  13.  * are met:
  14.  * 1. Redistributions of source code must retain the above copyright
  15.  *    notice, this list of conditions and the following disclaimer.
  16.  * 2. Redistributions in binary form must reproduce the above copyright
  17.  *    notice, this list of conditions and the following disclaimer in the
  18.  *    documentation and/or other materials provided with the distribution.
  19.  * 3. Neither the name of the University nor the names of its contributors
  20.  *    may be used to endorse or promote products derived from this software
  21.  *    without specific prior written permission.
  22.  *
  23.  * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
  24.  * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
  25.  * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
  26.  * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
  27.  * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
  28.  * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
  29.  * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
  30.  * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
  31.  * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
  32.  * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
  33.  * SUCH DAMAGE.
  34.  *
  35.  *  @(#)tetris.c    8.1 (Berkeley) 5/31/93
  36.  */
  37.  
  38. #ifndef lint
  39. static const char copyright[] =
  40. "@(#) Copyright (c) 1992, 1993\n\
  41.     The Regents of the University of California.  All rights reserved.\n";
  42. #endif /* not lint */
  43.  
  44. /*
  45.  * Tetris (or however it is spelled).
  46.  */
  47.  
  48. #include <sys/time.h>
  49. #include <sys/types.h>
  50.  
  51. #include <err.h>
  52. #include <stdio.h>
  53. #include <stdlib.h>
  54. #include <string.h>
  55. #include <unistd.h>
  56.  
  57. #include "input.h"
  58. #include "scores.h"
  59. #include "screen.h"
  60. #include "tetris.h"
  61.  
  62. cell    board[B_SIZE];
  63. int Rows, Cols;
  64. const struct shape *curshape;
  65. const struct shape *nextshape;
  66. long    fallrate;
  67. int score;
  68. //gid_t gid, egid;
  69. char    key_msg[100];
  70. int showpreview, classic;
  71.  
  72. static void elide(void);
  73. static void setup_board(void);
  74. const struct shape *randshape(void);
  75. void    onintr(int);
  76. void    usage(void);
  77.  
  78. /*
  79.  * Set up the initial board.  The bottom display row is completely set,
  80.  * along with another (hidden) row underneath that.  Also, the left and
  81.  * right edges are set.
  82.  */
  83. static void
  84. setup_board(void)
  85. {
  86.     int i;
  87.     cell *p;
  88.  
  89.     p = board;
  90.     for (i = B_SIZE; i; i--)
  91.         *p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
  92. }
  93.  
  94. /*
  95.  * Elide any full active rows.
  96.  */
  97. static void
  98. elide(void)
  99. {
  100.     int rows = 0;
  101.     int i, j, base;
  102.     cell *p;
  103.  
  104.     for (i = A_FIRST; i < A_LAST; i++) {
  105.         base = i * B_COLS + 1;
  106.         p = &board[base];
  107.         for (j = B_COLS - 2; *p++ != 0;) {
  108.             if (--j <= 0) {
  109.                 /* this row is to be elided */
  110.                 rows++;
  111.                 memset(&board[base], 0, B_COLS - 2);
  112.                 scr_update();
  113.                 tsleep();
  114.                 while (--base != 0)
  115.                     board[base + B_COLS] = board[base];
  116.                 scr_update();
  117.                 tsleep();
  118.                 break;
  119.             }
  120.         }
  121.     }
  122.     switch (rows) {
  123.     case 1:
  124.         score += 10;
  125.         break;
  126.     case 2:
  127.         score += 30;
  128.         break;
  129.     case 3:
  130.         score += 70;
  131.         break;
  132.     case 4:
  133.         score += 150;
  134.         break;
  135.     default:
  136.         break;
  137.     }
  138. }
  139.  
  140. const struct shape *
  141. randshape(void)
  142. {
  143.     const struct shape *tmp;
  144.     int i, j;
  145.  
  146.     tmp = &shapes[random() % 7];
  147.     j = random() % 4;
  148.     for (i = 0; i < j; i++)
  149.         tmp = &shapes[classic? tmp->rotc : tmp->rot];
  150.     return (tmp);
  151. }
  152.  
  153. static void srandomdev(void)
  154. {
  155.     struct timeval tv;
  156.  
  157.     gettimeofday(&tv, NULL);
  158.     srandom(tv.tv_sec + tv.tv_usec / 100000);
  159. }
  160.  
  161. static void tetris_scores(int firstgame)
  162. {
  163. }
  164.  
  165. static void tetris_menu_draw(int level)
  166. {
  167.         clear_screen();
  168.         moveto(5,10);
  169.         puts("Tetris\n\n");
  170.            
  171.         moveto(8,10);
  172.         printf("Level = %d (press keys 1 - 9 to change)",level);
  173.         moveto(9,10);
  174.         printf("Preview is %s (press 'p' to change)", (showpreview?"on ":"off"));
  175.         moveto(12,10);
  176.         printf("Press 'h' to show hiscore table.");
  177.         moveto(13,10);
  178.         printf("Press 's' to start game.");
  179.         moveto(14,10);
  180.         printf("Press 'q' to quit game.");
  181.         moveto(20,10);
  182.         printf("In game controls:");
  183.         moveto(21,0);
  184.         puts(key_msg);
  185. }
  186.  
  187. static int tetris_menu(int *level)
  188. {
  189.     static int firstgame = 1;
  190.     int i;
  191. /*  if (showpreview == 0)
  192.         (void)printf("Your score:  %d point%s  x  level %d  =  %d\n",
  193.             score, score == 1 ? "" : "s", level, score * level);
  194.     else {
  195.         (void)printf("Your score:  %d point%s x level %d x preview penalty %0.3f = %d\n",
  196.             score, score == 1 ? "" : "s", level, (double)PRE_PENALTY,
  197.             (int)(score * level * PRE_PENALTY));
  198.         score = score * PRE_PENALTY;
  199.     }
  200.     savescore(level);
  201.  
  202.     showscores(level);
  203.    
  204.     printf("\nHit 's' to new game, 'q' to quit.\n");
  205. */
  206.     tetris_menu_draw(*level);
  207.     while (1) {
  208.    
  209.         i = getchar();
  210.        
  211.         switch(i) {
  212.             case 'p':
  213.                 showpreview = !showpreview;
  214.                 moveto(9,21);
  215.                 if (showpreview)
  216.                     printf("on ");
  217.                 else
  218.                     printf("off");
  219.                    
  220.                 break;
  221.             case 'h':
  222.                 showscores(firstgame);
  223.                 tetris_menu_draw(*level);
  224.                 break;
  225.             case 's':
  226.                 firstgame = 0;
  227.                 return 1;
  228.             case 'q':
  229.                 return 0;
  230.             case '1':
  231.             case '2':
  232.             case '3':
  233.             case '4':
  234.             case '5':
  235.             case '6':      
  236.             case '7':
  237.             case '8':
  238.             case '9':
  239.                 *level = i - '0';
  240.                 moveto(8,18);
  241.                 printf("%d", *level);
  242.                 break;
  243.         }
  244.     }
  245.    
  246. }
  247.  
  248. int
  249. main(int argc, char *argv[])
  250. {
  251.     int pos, c;
  252.     char *keys;
  253.     int level = 2;
  254.     char key_write[6][10];
  255.     const char *errstr;
  256.     int ch, i, j;
  257.  
  258.     keys = "jkl pq";
  259.  
  260. //  gid = getgid();
  261. //  egid = getegid();
  262. //  setegid(gid);
  263.  
  264.     classic = 0;
  265.     showpreview = 1;
  266.  
  267. /*  while ((ch = getopt(argc, argv, "ck:l:ps")) != -1) */
  268. /*      switch(ch) { */
  269. /*      case 'c': */
  270. /*          /\* */
  271. /*           * this means: */
  272. /*           *  - rotate the other way; */
  273. /*           *  - no reverse video. */
  274. /*           *\/ */
  275. /*          classic = 1; */
  276. /*          break; */
  277. /*      case 'k': */
  278. /*          if (strlen(keys = optarg) != 6) */
  279. /*              usage(); */
  280. /*          break; */
  281. /*      case 'l': */
  282. /*          level = (int)strtonum(optarg, MINLEVEL, MAXLEVEL, */
  283. /*              &errstr); */
  284. /*          if (errstr) */
  285. /*              errx(1, "level must be from %d to %d", */
  286. /*                  MINLEVEL, MAXLEVEL); */
  287. /*          break; */
  288. /*      case 'p': */
  289. /*          showpreview = 1; */
  290. /*          break; */
  291. /*      case 's': */
  292. /*          showscores(0); */
  293. /*          exit(0); */
  294. /*      default: */
  295. /*          usage(); */
  296. /*      } */
  297.  
  298. /*  argc -= optind; */
  299. /*  argv += optind; */
  300.  
  301. /*  if (argc) */
  302. /*      usage(); */
  303.  
  304.     fallrate = 1000000 / level;
  305.  
  306.     for (i = 0; i <= 5; i++) {
  307.         for (j = i+1; j <= 5; j++) {
  308.             if (keys[i] == keys[j])
  309.                 errx(1, "duplicate command keys specified.");
  310.         }
  311.         if (keys[i] == ' ')
  312.             strncpy(key_write[i], "<space>", sizeof key_write[i]);
  313.         else {
  314.             key_write[i][0] = keys[i];
  315.             key_write[i][1] = '\0';
  316.         }
  317.     }
  318.  
  319.     snprintf(key_msg, sizeof key_msg,
  320. "%s - left   %s - rotate   %s - right   %s - drop   %s - pause   %s - quit",
  321.         key_write[0], key_write[1], key_write[2], key_write[3],
  322.         key_write[4], key_write[5]);
  323.  
  324.     scr_init();
  325.     initscores();
  326.     while (tetris_menu(&level)) {
  327.  
  328.  
  329.         scr_clear();
  330.         setup_board();
  331.    
  332.         srandomdev();
  333.         scr_set();
  334.    
  335.         pos = A_FIRST*B_COLS + (B_COLS/2)-1;
  336.         nextshape = randshape();
  337.         curshape = randshape();
  338.    
  339.         scr_msg(key_msg, 1);
  340.    
  341.         for (;;) {
  342.             place(curshape, pos, 1);
  343.             scr_update();
  344.             place(curshape, pos, 0);
  345.             c = tgetchar();
  346.             if (c < 0) {
  347.                 /*
  348.                  * Timeout.  Move down if possible.
  349.                  */
  350.                 if (fits_in(curshape, pos + B_COLS)) {
  351.                     pos += B_COLS;
  352.                     continue;
  353.                 }
  354.    
  355.                 /*
  356.                  * Put up the current shape `permanently',
  357.                  * bump score, and elide any full rows.
  358.                  */
  359.                 place(curshape, pos, 1);
  360.                 score++;
  361.                 elide();
  362.    
  363.                 /*
  364.                  * Choose a new shape.  If it does not fit,
  365.                  * the game is over.
  366.                  */
  367.                 curshape = nextshape;
  368.                 nextshape = randshape();
  369.                 pos = A_FIRST*B_COLS + (B_COLS/2)-1;
  370.                 if (!fits_in(curshape, pos))
  371.                     break;
  372.                 continue;
  373.             }
  374.    
  375.             /*
  376.              * Handle command keys.
  377.              */
  378.             if (c == keys[5]) {
  379.                 /* quit */
  380.                 break;
  381.             }
  382.             if (c == keys[4]) {
  383.                 static char msg[] =
  384.                     "paused - press RETURN to continue";
  385.    
  386.                 place(curshape, pos, 1);
  387.                 do {
  388.                     scr_update();
  389.                     scr_msg(key_msg, 0);
  390.                     scr_msg(msg, 1);
  391.     //              (void) fflush(stdout);
  392.                 } while (rwait((struct timeval *)NULL) == -1);
  393.                 scr_msg(msg, 0);
  394.                 scr_msg(key_msg, 1);
  395.                 place(curshape, pos, 0);
  396.                 continue;
  397.             }
  398.             if (c == keys[0]) {
  399.                 /* move left */
  400.                 if (fits_in(curshape, pos - 1))
  401.                     pos--;
  402.                 continue;
  403.             }
  404.             if (c == keys[1]) {
  405.                 /* turn */
  406.                 const struct shape *new = &shapes[
  407.                     classic? curshape->rotc : curshape->rot];
  408.    
  409.                 if (fits_in(new, pos))
  410.                     curshape = new;
  411.                 continue;
  412.             }
  413.             if (c == keys[2]) {
  414.                 /* move right */
  415.                 if (fits_in(curshape, pos + 1))
  416.                     pos++;
  417.                 continue;
  418.             }
  419.             if (c == keys[3]) {
  420.                 /* move to bottom */
  421.                 while (fits_in(curshape, pos + B_COLS)) {
  422.                     pos += B_COLS;
  423.                     score++;
  424.                 }
  425.                 continue;
  426.             }
  427.             if (c == '\f') {
  428.                 scr_clear();
  429.                 scr_msg(key_msg, 1);
  430.             }
  431.         }
  432.        
  433.         scr_clear();
  434.         insertscore(score, level);
  435.     }
  436.    
  437.     scr_clear();
  438.     printf("\n\n\n\t\tGame over.\n");
  439. /* 
  440.     while ((i = getchar()) != '\n')
  441.         if (i == EOF)
  442.             break
  443. */
  444.     scr_end();
  445.     exit(0);
  446. }
  447.  
  448. /* void */
  449. /* onintr(int signo) */
  450. /* { */
  451. /*  scr_clear();        /\* XXX signal race *\/ */
  452. /*  scr_end();      /\* XXX signal race *\/ */
  453. /*  _exit(0); */
  454. /* } */
  455.  
  456. void
  457. usage(void)
  458. {
  459.     (void)fprintf(stderr, "usage: tetris [-ps] [-k keys] [-l level]\n");
  460.     exit(1);
  461. }
  462.