Change license from 3-clause BSD to 2-clause BSD and add SPDX tags.

[wumpus.git] / superhack.c

diff --git a/superhack.c b/superhack.c
index 82d480907a6238a75d50027700f511b8520af4c2..2a245bdaac5814a19953f16a1906403021737b11 100644 (file)
--- a/superhack.c
+++ b/superhack.c
@@ -3,22 +3,28 @@
  *
  * Author: Eric S. Raymond <esr@snark.thyrsus.com>
  *
- * My update of a classic adventure game.  The C is crude because it's
- * a hack on a line-by-line translation of a BASIC `Hunt The Wumpus'.
- * This code is no relation to the elaborate dungeon game called `Hack'.
+ * My update of a classic adventure game.  This code is no relation to
+ * the elaborate dungeon game called `Hack'.
  *
  * Any resemblance to persons living or dead is strictly coincidental.  And
  * if you believe *that*...
+ *
+ * SPDX-License-Identifier: BSD-2-Clause
  */
 
 #include <stdio.h>
 #include <ctype.h>
 #include <stdlib.h>
+#include <string.h>
+#include <unistd.h>
+#include <time.h>
+#include <sys/socket.h>
 
 static int path[5];
 static int j, k, scratchloc, pies;
 static char inp[BUFSIZ];               /* common input buffer */
 
+#define NUMBERS "0123456789"
 #define YOU    0
 #define RMS    1
 #define STARLET1       2
@@ -35,6 +41,8 @@ static int loc[LOCS];
 #define LOSE   -1
 static int finished;
 
+#define IGNORE(r) do{if(r);}while(0)
+
 static int cave[20][3] =
 {
     {1,4,7},
@@ -69,7 +77,7 @@ int getlet(prompt)
 char *prompt;
 {
     (void) printf("%s? ", prompt);
-    if(fgets(inp, sizeof(inp), stdin))
+    if (fgets(inp, sizeof(inp), stdin))
       return(tolower(inp[0]));
     else {
       fputs("\n",stdout);
@@ -81,8 +89,6 @@ char *prompt;
 
 void print_instructions()
 {
-    char ebuf[BUFSIZ];
-
     PM("Welcome to `Hunt the Superhack'\n")
 
 PM("   The superhack lives on the 9th floor of 45 Technology Square in");
@@ -105,7 +111,7 @@ PM("Cambridge, Massachusetts.  Your mission is to throw a pie in his face.\n");
     PM("   If a pie hits the superhack, you win. If it hits you, you lose!\n");
 
     (void) fputs("<Press return to continue>", stdout);
-    (void) fgets(inp, sizeof(inp), stdin);
+    IGNORE(fgets(inp, sizeof(inp), stdin));
     (void) putchar('\n');
 
     PM("Hazards:");
@@ -223,8 +229,9 @@ void throw()
     extern void check_shot(), move_superhack();
     int        j9;
 
-    j9 = sscanf(inp + isalpha(inp[0]), "%d %d %d %d %d",
+    j9 = sscanf(inp + strcspn(inp, NUMBERS), "%d %d %d %d %d",
                    &path[0], &path[1], &path[2], &path[3], &path[4]);
+
     if (j9 < 1)
     {
        PM("Sorry, I didn't see any room numbers after your throw command.");
@@ -232,7 +239,7 @@ void throw()
     }
 
     for (k = 0; k < j9; k++)
-       if (path[k] == path[k - 2])
+       if (k >= 2 && path[k] == path[k - 2])
        {
            (void) puts("Pies can't fly that crookedly --- try again.");
            return;
@@ -262,7 +269,6 @@ void throw()
 
     }
 
- ammo:
     if (finished == NOT)
     {
        (void) puts("You missed.");
@@ -310,7 +316,7 @@ void move_superhack()
 
 void move()
 {
-    if (sscanf(inp + isalpha(inp[0]), "%d", &scratchloc) < 1)
+    if (sscanf(inp + strcspn(inp, NUMBERS), "%d", &scratchloc) < 1)
     {
        PM("Sorry, I didn't see a room number after your `m' command.");
        return;
@@ -351,9 +357,7 @@ goodmove:
     }
 }
 
-main(argc, argv)
-int argc;
-char *argv[];
+int main(int argc, char *argv[])
 {
     if (argc >= 2 && strcmp(argv[1], "-s") == 0)
        srand(atoi(argv[2]));
@@ -424,6 +428,7 @@ char *argv[];
            break;
        }
     }
+    return 0;
 }
 
 /* superhack.c ends here */