/* Copyright (c) 1992 Regents of the University of California */

#ifndef lint
static char SCCSid[] = "@(#)wordfile.c 2.4 11/3/92 LBL";
#endif

/*
 * Load whitespace separated words from a file into an array.
 * Assume the passed pointer array is big enough to hold them all.
 */

#include <ctype.h>

#define NULL		0

#define MAXFLEN		8192		/* file must be smaller than this */

extern char	*bmalloc();


int
wordfile(words, fname)		/* get words from fname, put in words */
char	**words;
char	*fname;
{
	int	fd;
	char	buf[MAXFLEN];
	register int	n;
					/* load file into buffer */
	if ((fd = open(fname, 0)) < 0)
		return(-1);			/* open error */
	n = read(fd, buf, MAXFLEN);
	close(fd);
	if (n < 0)				/* read error */
		return(-1);
	if (n == MAXFLEN)		/* file too big, take what we can */
		while (!isspace(buf[--n]))
			if (n <= 0)		/* one long word! */
				return(-1);
	buf[n] = '\0';			/* terminate */
	return(wordstring(words, buf));	/* wordstring does the rest */
}


int
wordstring(avl, str)			/* allocate and load argument list */
char	**avl;
char	*str;
{
	register char	*cp, **ap;
	
	if (str == NULL)
		return(-1);
	cp = bmalloc(strlen(str)+1);
	if (cp == NULL)			/* ENOMEM */
		return(-1);
	strcpy(cp, str);
	ap = avl;		/* parse into words */
	for ( ; ; ) {
		while (isspace(*cp))	/* nullify spaces */
			*cp++ = '\0';
		if (!*cp)		/* all done? */
			break;
		*ap++ = cp;		/* add argument to list */
		while (*cp && !isspace(*cp++))
			;
	}
	*ap = NULL;
	return(ap - avl);
}