BSD 4_2 development

[unix-history] / usr / src / games / hangman / getword.c

# include       "hangman.h"

# if pdp11
#       define  RN      (((off_t) rand() << 16) | (off_t) rand())
# else
#       define  RN      rand()
# endif

/*
* getword:
*      Get a valid word out of the dictionary file
*/
getword()
{
       register FILE           *inf;
       register char           *wp, *gp;

       inf = Dict;
       for (;;) {
               fseek(inf, abs(RN % Dict_size), 0);
               if (fgets(Word, BUFSIZ, inf) == NULL)
                       continue;
               if (fgets(Word, BUFSIZ, inf) == NULL)
                       continue;
               Word[strlen(Word) - 1] = '\0';
               if (strlen(Word) < MINLEN)
                       continue;
               for (wp = Word; *wp; wp++)
                       if (!islower(*wp))
                               goto cont;
               break;
cont:           ;
       }
       gp = Known;
       wp = Word;
       while (*wp) {
               *gp++ = '-';
               wp++;
       }
       *gp = '\0';
}

/*
* abs:
*      Return the absolute value of an integer
*/
off_t
abs(i)
off_t   i;
{
       if (i < 0)
               return -(off_t) i;
       else
               return (off_t) i;
}