Avoid common symbols. Use __dead.

[bsdgames-darwin.git] / tetris / tetris.c

diff --git a/tetris/tetris.c b/tetris/tetris.c
index 5b770cc4506e95b4d6ff5c52472cce708f204e79..286e7c4550190f88c4097eb59018f8c0a4346295 100644 (file)
--- a/tetris/tetris.c
+++ b/tetris/tetris.c
@@ -1,4 +1,4 @@
-/*     $NetBSD: tetris.c,v 1.16 2003/08/07 09:37:48 agc Exp $  */
+/*     $NetBSD: tetris.c,v 1.33 2020/07/21 02:42:05 nia Exp $  */
 
 /*-
  * Copyright (c) 1992, 1993
@@ -36,8 +36,8 @@
 
 #include <sys/cdefs.h>
 #ifndef lint
-__COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
-       The Regents of the University of California.  All rights reserved.\n");
+__COPYRIGHT("@(#) Copyright (c) 1992, 1993\
+ The Regents of the University of California.  All rights reserved.");
 #endif /* not lint */
 
 /*
@@ -62,8 +62,9 @@ __COPYRIGHT("@(#) Copyright (c) 1992, 1993\n\
 cell   board[B_SIZE];          /* 1 => occupied, 0 => empty */
 
 int    Rows, Cols;             /* current screen size */
+int    Offset;                 /* used to center board & shapes */
 
-const struct shape *curshape;
+static const struct shape *curshape;
 const struct shape *nextshape;
 
 long   fallrate;               /* less than 1 million; smaller => faster */
@@ -73,12 +74,12 @@ gid_t       gid, egid;
 
 char   key_msg[100];
 int    showpreview;
+int    nocolor;
 
-static void    elide __P((void));
-static void    setup_board __P((void));
-       int     main __P((int, char **));
-       void    onintr __P((int)) __attribute__((__noreturn__));
-       void    usage __P((void)) __attribute__((__noreturn__));
+static void elide(void);
+static void setup_board(void);
+static void onintr(int) __dead;
+static void usage(void) __dead;
 
 /*
  * Set up the initial board.  The bottom display row is completely set,
@@ -86,21 +87,21 @@ static      void    setup_board __P((void));
  * right edges are set.
  */
 static void
-setup_board()
+setup_board(void)
 {
        int i;
        cell *p;
 
        p = board;
        for (i = B_SIZE; i; i--)
-               *p++ = i <= (2 * B_COLS) || (i % B_COLS) < 2;
+               *p++ = (i <= (2 * B_COLS) || (i % B_COLS) < 2) ? 7 : 0;
 }
 
 /*
  * Elide any full active rows.
  */
 static void
-elide()
+elide(void)
 {
        int i, j, base;
        cell *p;
@@ -116,6 +117,8 @@ elide()
                                tsleep();
                                while (--base != 0)
                                        board[base + B_COLS] = board[base];
+                               /* don't forget to clear 0th row */
+                               memset(&board[1], 0, B_COLS - 2);
                                scr_update();
                                tsleep();
                                break;
@@ -125,14 +128,13 @@ elide()
 }
 
 int
-main(argc, argv)
-       int argc;
-       char *argv[];
+main(int argc, char *argv[])
 {
        int pos, c;
        const char *keys;
        int level = 2;
-       char key_write[6][10];
+#define NUMKEYS 7
+       char key_write[NUMKEYS][10];
        int ch, i, j;
        int fd;
 
@@ -145,12 +147,15 @@ main(argc, argv)
                exit(1);
        close(fd);
 
-       keys = "jkl pq";
+       keys = "jkl pqn";
 
-       while ((ch = getopt(argc, argv, "k:l:ps")) != -1)
+       while ((ch = getopt(argc, argv, "bk:l:ps")) != -1)
                switch(ch) {
+               case 'b':
+                       nocolor = 1;
+                       break;
                case 'k':
-                       if (strlen(keys = optarg) != 6)
+                       if (strlen(keys = optarg) != NUMKEYS)
                                usage();
                        break;
                case 'l':
@@ -179,8 +184,8 @@ main(argc, argv)
 
        fallrate = 1000000 / level;
 
-       for (i = 0; i <= 5; i++) {
-               for (j = i+1; j <= 5; j++) {
+       for (i = 0; i <= (NUMKEYS-1); i++) {
+               for (j = i+1; j <= (NUMKEYS-1); j++) {
                        if (keys[i] == keys[j]) {
                                errx(1, "duplicate command keys specified.");
                        }
@@ -193,16 +198,15 @@ main(argc, argv)
                }
        }
 
-       sprintf(key_msg,
-"%s - left   %s - rotate   %s - right   %s - drop   %s - pause   %s - quit",
+       snprintf(key_msg, sizeof(key_msg),
+"%s - left  %s - rotate  %s - right  %s - drop  %s - pause  %s - quit  %s - down",
                key_write[0], key_write[1], key_write[2], key_write[3],
-               key_write[4], key_write[5]);
+               key_write[4], key_write[5], key_write[6]);
 
        (void)signal(SIGINT, onintr);
        scr_init();
        setup_board();
 
-       srandom(getpid());
        scr_set();
 
        pos = A_FIRST*B_COLS + (B_COLS/2)-1;
@@ -262,7 +266,7 @@ main(argc, argv)
                                scr_msg(key_msg, 0);
                                scr_msg(msg, 1);
                                (void) fflush(stdout);
-                       } while (rwait((struct timeval *)NULL) == -1);
+                       } while (rwait(NULL) == -1);
                        scr_msg(msg, 0);
                        scr_msg(key_msg, 1);
                        place(curshape, pos, 0);
@@ -296,6 +300,14 @@ main(argc, argv)
                        }
                        continue;
                }
+               if (c == keys[6]) {
+                       /* move down */
+                       if (fits_in(curshape, pos + B_COLS)) {
+                               pos += B_COLS;
+                               score++;
+                       }
+                       continue;
+               }
                if (c == '\f') {
                        scr_clear();
                        scr_msg(key_msg, 1);
@@ -320,18 +332,18 @@ main(argc, argv)
        exit(0);
 }
 
-void
-onintr(signo)
-       int signo __attribute__((__unused__));
+static void
+onintr(int signo __unused)
 {
        scr_clear();
        scr_end();
        exit(0);
 }
 
-void
-usage()
+static void
+usage(void)
 {
-       (void)fprintf(stderr, "usage: tetris [-ps] [-k keys] [-l level]\n");
+       (void)fprintf(stderr, "usage: %s [-bps] [-k keys] [-l level]\n",
+           getprogname());
        exit(1);
 }