[unix-history] / usr / src / usr.bin / pascal / libpc / EXPO.c

/* Copyright (c) 1979 Regents of the University of California */

static char sccsid[] = "@(#)EXPO.c 1.2 %G%";

long
EXPO(value)

	double	value;
{
	register int retval;
	register char *cp;
	char sign, buf[30];
	extern char *index();

	if (value == 0.0)
		return 0;
	sprintf(buf, "%.1e", value);
	cp = index(buf, 'e') + 1;
	sign = *cp++;
	retval = 0;
	while (*cp)
		retval = retval * 10 + *cp++ - '0';
	return sign == '-' ? -retval : retval;
}
Commit	Line	Data
22a648b6 KM	1	/* Copyright (c) 1979 Regents of the University of California */
22a648b6 KM	2
492cc5d3	3	static char sccsid[] = "@(#)EXPO.c 1.2 %G%";
22a648b6	4
492cc5d3	5	long
22a648b6 KM	6	EXPO(value)
22a648b6 KM	7
492cc5d3	8	double value;
22a648b6	9	{
492cc5d3 KM	10	register int retval;
	11	register char *cp;
	12	char sign, buf[30];
	13	extern char *index();
	14
	15	if (value == 0.0)
22a648b6	16	return 0;
492cc5d3 KM	17	sprintf(buf, "%.1e", value);
	18	cp = index(buf, 'e') + 1;
	19	sign = *cp++;
	20	retval = 0;
	21	while (*cp)
	22	retval = retval * 10 + *cp++ - '0';
	23	return sign == '-' ? -retval : retval;
22a648b6	24	}