[unix-history] / usr / src / usr.bin / f77 / libF77 / rindex_.c

/*
char id_rindex[] = "@(#)rindex_.c	1.2";
 *
 * find last occurrence of substring in string
 *
 * calling sequence:
 *	character*(*) substr, string
 *	indx = rindex (string, substr)
 * where:
 *	indx will be the index of the first character of the last occurence
 *	of substr in string, or zero if not found.
 */

long rindex_(str, substr, slen, sublen)
char *str, *substr; long slen, sublen;
{
	register char *p = str + (slen - sublen);

	while (p >= str)
		if (s_cmp(substr, p, sublen, slen) == 0)
			return((long)(++p - str));
		else
			p--;
	return(0L);
}
Commit	Line	Data
6d4cbc1e	1	/*
5a178c25	2	char id_rindex[] = "@(#)rindex_.c 1.2";
6d4cbc1e DW	3	*
	4	* find last occurrence of substring in string
	5	*
	6	* calling sequence:
	7	* character() substr, string
	8	* indx = rindex (string, substr)
	9	* where:
	10	* indx will be the index of the first character of the last occurence
	11	* of substr in string, or zero if not found.
	12	*/
	13
	14	long rindex_(str, substr, slen, sublen)
	15	char str, substr; long slen, sublen;
	16	{
	17	register char *p = str + (slen - sublen);
	18
	19	while (p >= str)
5a178c25	20	if (s_cmp(substr, p, sublen, slen) == 0)
6d4cbc1e DW	21	return((long)(++p - str));
	22	else
	23	p--;
	24	return(0L);
	25	}