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

/*
 * Copyright (c) 1983 Regents of the University of California.
 * All rights reserved.
 *
 * Redistribution and use in source and binary forms, with or without
 * modification, are permitted provided that the following conditions
 * are met:
 * 1. Redistributions of source code must retain the above copyright
 *    notice, this list of conditions and the following disclaimer.
 * 2. Redistributions in binary form must reproduce the above copyright
 *    notice, this list of conditions and the following disclaimer in the
 *    documentation and/or other materials provided with the distribution.
 * 3. All advertising materials mentioning features or use of this software
 *    must display the following acknowledgement:
 *	This product includes software developed by the University of
 *	California, Berkeley and its contributors.
 * 4. Neither the name of the University nor the names of its contributors
 *    may be used to endorse or promote products derived from this software
 *    without specific prior written permission.
 *
 * THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
 * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
 * ARE DISCLAIMED.  IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
 * SUCH DAMAGE.
 */

#ifndef lint
static char sccsid[] = "@(#)getword.c	5.3 (Berkeley) 6/1/90";
#endif /* not lint */

# 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
15637ed4 RG	1	/*
	2	* Copyright (c) 1983 Regents of the University of California.
	3	* All rights reserved.
	4	*
	5	* Redistribution and use in source and binary forms, with or without
	6	* modification, are permitted provided that the following conditions
	7	* are met:
	8	* 1. Redistributions of source code must retain the above copyright
	9	* notice, this list of conditions and the following disclaimer.
	10	* 2. Redistributions in binary form must reproduce the above copyright
	11	* notice, this list of conditions and the following disclaimer in the
	12	* documentation and/or other materials provided with the distribution.
	13	* 3. All advertising materials mentioning features or use of this software
	14	* must display the following acknowledgement:
	15	* This product includes software developed by the University of
	16	* California, Berkeley and its contributors.
	17	* 4. Neither the name of the University nor the names of its contributors
	18	* may be used to endorse or promote products derived from this software
	19	* without specific prior written permission.
	20	*
	21	* THIS SOFTWARE IS PROVIDED BY THE REGENTS AND CONTRIBUTORS ``AS IS'' AND
	22	* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
	23	* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
	24	* ARE DISCLAIMED. IN NO EVENT SHALL THE REGENTS OR CONTRIBUTORS BE LIABLE
	25	* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
	26	* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
	27	* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
	28	* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
	29	* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
	30	* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
	31	* SUCH DAMAGE.
	32	*/
	33
	34	#ifndef lint
	35	static char sccsid[] = "@(#)getword.c 5.3 (Berkeley) 6/1/90";
	36	#endif /* not lint */
	37
	38	# include "hangman.h"
	39
	40	# if pdp11
	41	# define RN (((off_t) rand() << 16) \| (off_t) rand())
	42	# else
	43	# define RN rand()
	44	# endif
	45
	46	/*
	47	* getword:
	48	* Get a valid word out of the dictionary file
	49	*/
	50	getword()
	51	{
	52	register FILE *inf;
	53	register char wp, gp;
	54
	55	inf = Dict;
	56	for (;;) {
	57	fseek(inf, abs(RN % Dict_size), 0);
	58	if (fgets(Word, BUFSIZ, inf) == NULL)
	59	continue;
	60	if (fgets(Word, BUFSIZ, inf) == NULL)
	61	continue;
	62	Word[strlen(Word) - 1] = '\0';
	63	if (strlen(Word) < MINLEN)
	64	continue;
65	for (wp = Word; *wp; wp++)
66	if (!islower(*wp))
67	goto cont;
68	break;
69	cont: ;
70	}
71	gp = Known;
72	wp = Word;
73	while (*wp) {
74	*gp++ = '-';
75	wp++;
76	}
77	*gp = '\0';
78	}
79
80	/*
81	* abs:
82	* Return the absolute value of an integer
83	*/
84	off_t
85	abs(i)
86	off_t i;
87	{
88	if (i < 0)
89	return -(off_t) i;
90	else
91	return (off_t) i;
92	}