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/*-
* Copyright (c) 2004 Stefan Farfeleder
* 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.
*
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR 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 AUTHOR 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.
*
* $FreeBSD$
*/
#include <assert.h>
#include <float.h>
#include <limits.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
int
main(void)
{
char buf[128], *end;
double d;
float f;
long double ld;
int e, i;
printf("1..3\n");
assert(ilogb(0) == FP_ILOGB0);
assert(ilogb(NAN) == FP_ILOGBNAN);
assert(ilogb(INFINITY) == INT_MAX);
for (e = DBL_MIN_EXP - DBL_MANT_DIG; e < DBL_MAX_EXP; e++) {
snprintf(buf, sizeof(buf), "0x1.p%d", e);
d = strtod(buf, &end);
assert(*end == '\0');
i = ilogb(d);
assert(i == e);
}
printf("ok 1 - ilogb\n");
assert(ilogbf(0) == FP_ILOGB0);
assert(ilogbf(NAN) == FP_ILOGBNAN);
assert(ilogbf(INFINITY) == INT_MAX);
for (e = FLT_MIN_EXP - FLT_MANT_DIG; e < FLT_MAX_EXP; e++) {
snprintf(buf, sizeof(buf), "0x1.p%d", e);
f = strtof(buf, &end);
assert(*end == '\0');
i = ilogbf(f);
assert(i == e);
}
printf("ok 2 - ilogbf\n");
assert(ilogbl(0) == FP_ILOGB0);
assert(ilogbl(NAN) == FP_ILOGBNAN);
assert(ilogbl(INFINITY) == INT_MAX);
for (e = LDBL_MIN_EXP - LDBL_MANT_DIG; e < LDBL_MAX_EXP; e++) {
snprintf(buf, sizeof(buf), "0x1.p%d", e);
ld = strtold(buf, &end);
assert(*end == '\0');
i = ilogbl(ld);
assert(i == e);
}
printf("ok 3 - ilogbl\n");
return (0);
}
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