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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. /** @addtogroup tetris Tetris
  39.  * @brief   Tetris ported from OpenBSD
  40.  * @{
  41.  */
  42. /** @file
  43.  */
  44.  
  45. #ifndef lint
  46. static const char copyright[] =
  47. "@(#) Copyright (c) 1992, 1993\n\
  48.     The Regents of the University of California.  All rights reserved.\n";
  49. #endif /* not lint */
  50.  
  51. /*
  52.  * Tetris (or however it is spelled).
  53.  */
  54.  
  55. #include <sys/time.h>
  56. #include <sys/types.h>
  57.  
  58. #include <err.h>
  59. #include <stdio.h>
  60. #include <stdlib.h>
  61. #include <string.h>
  62. #include <unistd.h>
  63.  
  64. #include "input.h"
  65. #include "scores.h"
  66. #include "screen.h"
  67. #include "tetris.h"
  68.  
  69. cell    board[B_SIZE];
  70. int Rows, Cols;
  71. const struct shape *curshape;
  72. const struct shape *nextshape;
  73. long    fallrate;
  74. int score;
  75. //gid_t gid, egid;
  76. char    key_msg[100];
  77. int showpreview, classic;
  78.  
  79. static void elide(void);
  80. static void setup_board(void);
  81. const struct shape *randshape(void);
  82. void    onintr(int);
  83. void    usage(void);
  84.  
  85. /*
  86.  * Set up the initial board.  The bottom display row is completely set,
  87.  * along with another (hidden) row underneath that.  Also, the left and
  88.  * right edges are set.
  89.  */
  90. static void
  91. setup_board(void)
  92. {
  93.     int i;
  94.     cell *p;
  95.  
  96.     p = board;
  97.     for (i = B_SIZE; i; i--)
  98.         *p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
  99. }
  100.  
  101. /*
  102.  * Elide any full active rows.
  103.  */
  104. static void
  105. elide(void)
  106. {
  107.     int rows = 0;
  108.     int i, j, base;
  109.     cell *p;
  110.  
  111.     for (i = A_FIRST; i < A_LAST; i++) {
  112.         base = i * B_COLS + 1;
  113.         p = &board[base];
  114.         for (j = B_COLS - 2; *p++ != 0;) {
  115.             if (--j <= 0) {
  116.                 /* this row is to be elided */
  117.                 rows++;
  118.                 memset(&board[base], 0, B_COLS - 2);
  119.                 scr_update();
  120.                 tsleep();
  121.                 while (--base != 0)
  122.                     board[base + B_COLS] = board[base];
  123.                 scr_update();
  124.                 tsleep();
  125.                 break;
  126.             }
  127.         }
  128.     }
  129.     switch (rows) {
  130.     case 1:
  131.         score += 10;
  132.         break;
  133.     case 2:
  134.         score += 30;
  135.         break;
  136.     case 3:
  137.         score += 70;
  138.         break;
  139.     case 4:
  140.         score += 150;
  141.         break;
  142.     default:
  143.         break;
  144.     }
  145. }
  146.  
  147. const struct shape *
  148. randshape(void)
  149. {
  150.     const struct shape *tmp;
  151.     int i, j;
  152.  
  153.     tmp = &shapes[random() % 7];
  154.     j = random() % 4;
  155.     for (i = 0; i < j; i++)
  156.         tmp = &shapes[classic? tmp->rotc : tmp->rot];
  157.     return (tmp);
  158. }
  159.  
  160. static void srandomdev(void)
  161. {
  162.     struct timeval tv;
  163.  
  164.     gettimeofday(&tv, NULL);
  165.     srandom(tv.tv_sec + tv.tv_usec / 100000);
  166. }
  167.  
  168. static void tetris_menu_draw(int level)
  169. {
  170.         clear_screen();
  171.         moveto(5,10);
  172.         puts("Tetris\n\n");
  173.            
  174.         moveto(8,10);
  175.         printf("Level = %d (press keys 1 - 9 to change)",level);
  176.         moveto(9,10);
  177.         printf("Preview is %s (press 'p' to change)", (showpreview?"on ":"off"));
  178.         moveto(12,10);
  179.         printf("Press 'h' to show hiscore table.");
  180.         moveto(13,10);
  181.         printf("Press 's' to start game.");
  182.         moveto(14,10);
  183.         printf("Press 'q' to quit game.");
  184.         moveto(20,10);
  185.         printf("In game controls:");
  186.         moveto(21,0);
  187.         puts(key_msg);
  188. }
  189.  
  190. static int tetris_menu(int *level)
  191. {
  192.     static int firstgame = 1;
  193.     int i;
  194. /*  if (showpreview == 0)
  195.         (void)printf("Your score:  %d point%s  x  level %d  =  %d\n",
  196.             score, score == 1 ? "" : "s", level, score * level);
  197.     else {
  198.         (void)printf("Your score:  %d point%s x level %d x preview penalty %0.3f = %d\n",
  199.             score, score == 1 ? "" : "s", level, (double)PRE_PENALTY,
  200.             (int)(score * level * PRE_PENALTY));
  201.         score = score * PRE_PENALTY;
  202.     }
  203.     savescore(level);
  204.  
  205.     showscores(level);
  206.    
  207.     printf("\nHit 's' to new game, 'q' to quit.\n");
  208. */
  209.     tetris_menu_draw(*level);
  210.     while (1) {
  211.    
  212.         i = getchar();
  213.        
  214.         switch(i) {
  215.             case 'p':
  216.                 showpreview = !showpreview;
  217.                 moveto(9,21);
  218.                 if (showpreview)
  219.                     printf("on ");
  220.                 else
  221.                     printf("off");
  222.                    
  223.                 break;
  224.             case 'h':
  225.                 showscores(firstgame);
  226.                 tetris_menu_draw(*level);
  227.                 break;
  228.             case 's':
  229.                 firstgame = 0;
  230.                 return 1;
  231.             case 'q':
  232.                 return 0;
  233.             case '1':
  234.             case '2':
  235.             case '3':
  236.             case '4':
  237.             case '5':
  238.             case '6':      
  239.             case '7':
  240.             case '8':
  241.             case '9':
  242.                 *level = i - '0';
  243.                 moveto(8,18);
  244.                 printf("%d", *level);
  245.                 break;
  246.         }
  247.     }
  248.    
  249. }
  250.  
  251. int
  252. main(int argc, char *argv[])
  253. {
  254.     int pos, c;
  255.     char *keys;
  256.     int level = 2;
  257.     char key_write[6][10];
  258.     int i, j;
  259.  
  260.     keys = "jkl pq";
  261.  
  262. //  gid = getgid();
  263. //  egid = getegid();
  264. //  setegid(gid);
  265.  
  266.     classic = 0;
  267.     showpreview = 1;
  268.  
  269. /*  while ((ch = getopt(argc, argv, "ck:l:ps")) != -1) */
  270. /*      switch(ch) { */
  271. /*      case 'c': */
  272. /*          /\* */
  273. /*           * this means: */
  274. /*           *  - rotate the other way; */
  275. /*           *  - no reverse video. */
  276. /*           *\/ */
  277. /*          classic = 1; */
  278. /*          break; */
  279. /*      case 'k': */
  280. /*          if (strlen(keys = optarg) != 6) */
  281. /*              usage(); */
  282. /*          break; */
  283. /*      case 'l': */
  284. /*          level = (int)strtonum(optarg, MINLEVEL, MAXLEVEL, */
  285. /*              &errstr); */
  286. /*          if (errstr) */
  287. /*              errx(1, "level must be from %d to %d", */
  288. /*                  MINLEVEL, MAXLEVEL); */
  289. /*          break; */
  290. /*      case 'p': */
  291. /*          showpreview = 1; */
  292. /*          break; */
  293. /*      case 's': */
  294. /*          showscores(0); */
  295. /*          exit(0); */
  296. /*      default: */
  297. /*          usage(); */
  298. /*      } */
  299.  
  300. /*  argc -= optind; */
  301. /*  argv += optind; */
  302.  
  303. /*  if (argc) */
  304. /*      usage(); */
  305.  
  306.    
  307.  
  308.     for (i = 0; i <= 5; i++) {
  309.         for (j = i+1; j <= 5; j++) {
  310.             if (keys[i] == keys[j])
  311.                 errx(1, "duplicate command keys specified.");
  312.         }
  313.         if (keys[i] == ' ')
  314.             strncpy(key_write[i], "<space>", sizeof key_write[i]);
  315.         else {
  316.             key_write[i][0] = keys[i];
  317.             key_write[i][1] = '\0';
  318.         }
  319.     }
  320.  
  321.     snprintf(key_msg, sizeof key_msg,
  322. "%s - left   %s - rotate   %s - right   %s - drop   %s - pause   %s - quit",
  323.         key_write[0], key_write[1], key_write[2], key_write[3],
  324.         key_write[4], key_write[5]);
  325.  
  326.     scr_init();
  327.     initscores();
  328.     while (tetris_menu(&level)) {
  329.         fallrate = 1000000 / level;
  330.        
  331.         scr_clear();
  332.         setup_board();
  333.    
  334.         srandomdev();
  335.         scr_set();
  336.    
  337.         pos = A_FIRST*B_COLS + (B_COLS/2)-1;
  338.         nextshape = randshape();
  339.         curshape = randshape();
  340.    
  341.         scr_msg(key_msg, 1);
  342.    
  343.         for (;;) {
  344.             place(curshape, pos, 1);
  345.             scr_update();
  346.             place(curshape, pos, 0);
  347.             c = tgetchar();
  348.             if (c < 0) {
  349.                 /*
  350.                  * Timeout.  Move down if possible.
  351.                  */
  352.                 if (fits_in(curshape, pos + B_COLS)) {
  353.                     pos += B_COLS;
  354.                     continue;
  355.                 }
  356.    
  357.                 /*
  358.                  * Put up the current shape `permanently',
  359.                  * bump score, and elide any full rows.
  360.                  */
  361.                 place(curshape, pos, 1);
  362.                 score++;
  363.                 elide();
  364.    
  365.                 /*
  366.                  * Choose a new shape.  If it does not fit,
  367.                  * the game is over.
  368.                  */
  369.                 curshape = nextshape;
  370.                 nextshape = randshape();
  371.                 pos = A_FIRST*B_COLS + (B_COLS/2)-1;
  372.                 if (!fits_in(curshape, pos))
  373.                     break;
  374.                 continue;
  375.             }
  376.    
  377.             /*
  378.              * Handle command keys.
  379.              */
  380.             if (c == keys[5]) {
  381.                 /* quit */
  382.                 break;
  383.             }
  384.             if (c == keys[4]) {
  385.                 static char msg[] =
  386.                     "paused - press RETURN to continue";
  387.    
  388.                 place(curshape, pos, 1);
  389.                 do {
  390.                     scr_update();
  391.                     scr_msg(key_msg, 0);
  392.                     scr_msg(msg, 1);
  393.     //              (void) fflush(stdout);
  394.                 } while (rwait((struct timeval *)NULL) == -1);
  395.                 scr_msg(msg, 0);
  396.                 scr_msg(key_msg, 1);
  397.                 place(curshape, pos, 0);
  398.                 continue;
  399.             }
  400.             if (c == keys[0]) {
  401.                 /* move left */
  402.                 if (fits_in(curshape, pos - 1))
  403.                     pos--;
  404.                 continue;
  405.             }
  406.             if (c == keys[1]) {
  407.                 /* turn */
  408.                 const struct shape *new = &shapes[
  409.                     classic? curshape->rotc : curshape->rot];
  410.    
  411.                 if (fits_in(new, pos))
  412.                     curshape = new;
  413.                 continue;
  414.             }
  415.             if (c == keys[2]) {
  416.                 /* move right */
  417.                 if (fits_in(curshape, pos + 1))
  418.                     pos++;
  419.                 continue;
  420.             }
  421.             if (c == keys[3]) {
  422.                 /* move to bottom */
  423.                 while (fits_in(curshape, pos + B_COLS)) {
  424.                     pos += B_COLS;
  425.                     score++;
  426.                 }
  427.                 continue;
  428.             }
  429.             if (c == '\f') {
  430.                 scr_clear();
  431.                 scr_msg(key_msg, 1);
  432.             }
  433.         }
  434.        
  435.         scr_clear();
  436.         insertscore(score, level);
  437.         score=0;
  438.     }
  439.    
  440.     scr_clear();
  441.     printf("\n\n\n\t\tGame over.\n");
  442. /* 
  443.     while ((i = getchar()) != '\n')
  444.         if (i == EOF)
  445.             break
  446. */
  447.     scr_end();
  448.  
  449.     return 0;
  450. }
  451.  
  452. /* void */
  453. /* onintr(int signo) */
  454. /* { */
  455. /*  scr_clear();        /\* XXX signal race *\/ */
  456. /*  scr_end();      /\* XXX signal race *\/ */
  457. /*  _exit(0); */
  458. /* } */
  459.  
  460. void
  461. usage(void)
  462. {
  463.     (void)fprintf(stderr, "usage: tetris [-ps] [-k keys] [-l level]\n");
  464.     exit(1);
  465. }
  466.  
  467. /** @}
  468.  */
  469.  
  470.