[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;
}
Commit	Line	Data
198139e7 C	1	# include "hangman.h"
	2
	3	# if pdp11
	4	# define RN (((off_t) rand() << 16) \| (off_t) rand())
	5	# else
	6	# define RN rand()
	7	# endif
	8
	9	/*
	10	* getword:
	11	* Get a valid word out of the dictionary file
	12	*/
	13	getword()
	14	{
	15	register FILE *inf;
	16	register char wp, gp;
	17
	18	inf = Dict;
	19	for (;;) {
	20	fseek(inf, abs(RN % Dict_size), 0);
	21	if (fgets(Word, BUFSIZ, inf) == NULL)
	22	continue;
	23	if (fgets(Word, BUFSIZ, inf) == NULL)
	24	continue;
	25	Word[strlen(Word) - 1] = '\0';
	26	if (strlen(Word) < MINLEN)
	27	continue;
	28	for (wp = Word; *wp; wp++)
	29	if (!islower(*wp))
	30	goto cont;
	31	break;
	32	cont: ;
	33	}
	34	gp = Known;
	35	wp = Word;
	36	while (*wp) {
	37	*gp++ = '-';
	38	wp++;
	39	}
	40	*gp = '\0';
	41	}
	42
	43	/*
	44	* abs:
	45	* Return the absolute value of an integer
	46	*/
	47	off_t
	48	abs(i)
	49	off_t i;
	50	{
	51	if (i < 0)
	52	return -(off_t) i;
	53	else
	54	return (off_t) i;
	55	}