ilogb_test.c revision 136387
1101131Sscottl/*- 2101131Sscottl * Copyright (c) 2004 Stefan Farfeleder 3101131Sscottl * All rights reserved. 4101131Sscottl * 5101131Sscottl * Redistribution and use in source and binary forms, with or without 6101131Sscottl * modification, are permitted provided that the following conditions 7101131Sscottl * are met: 8101131Sscottl * 1. Redistributions of source code must retain the above copyright 9101131Sscottl * notice, this list of conditions and the following disclaimer. 10101131Sscottl * 2. Redistributions in binary form must reproduce the above copyright 11101131Sscottl * notice, this list of conditions and the following disclaimer in the 12101131Sscottl * documentation and/or other materials provided with the distribution. 13101131Sscottl * 14101131Sscottl * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15101131Sscottl * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16101131Sscottl * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE 17 * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE 18 * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL 19 * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS 20 * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) 21 * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT 22 * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY 23 * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF 24 * SUCH DAMAGE. 25 * 26 * $FreeBSD: head/tools/regression/lib/msun/test-ilogb.c 136387 2004-10-11 18:40:45Z stefanf $ 27 */ 28 29#include <assert.h> 30#include <float.h> 31#include <limits.h> 32#include <math.h> 33#include <stdio.h> 34#include <stdlib.h> 35 36int 37main(void) 38{ 39 char buf[128], *end; 40 double d; 41 float f; 42 long double ld; 43 int e, i; 44 45 assert(ilogb(0) == FP_ILOGB0); 46 assert(ilogb(NAN) == FP_ILOGBNAN); 47 assert(ilogb(INFINITY) == INT_MAX); 48 for (e = DBL_MIN_EXP - DBL_MANT_DIG; e < DBL_MAX_EXP; e++) { 49 snprintf(buf, sizeof(buf), "0x1.p%d", e); 50 d = strtod(buf, &end); 51 assert(*end == '\0'); 52 i = ilogb(d); 53 assert(i == e); 54 } 55 printf("PASS ilogb\n"); 56 57 assert(ilogbf(0) == FP_ILOGB0); 58 assert(ilogbf(NAN) == FP_ILOGBNAN); 59 assert(ilogbf(INFINITY) == INT_MAX); 60 for (e = FLT_MIN_EXP - FLT_MANT_DIG; e < FLT_MAX_EXP; e++) { 61 snprintf(buf, sizeof(buf), "0x1.p%d", e); 62 f = strtof(buf, &end); 63 assert(*end == '\0'); 64 i = ilogbf(f); 65 assert(i == e); 66 } 67 printf("PASS ilogbf\n"); 68 69 assert(ilogbl(0) == FP_ILOGB0); 70 assert(ilogbl(NAN) == FP_ILOGBNAN); 71 assert(ilogbl(INFINITY) == INT_MAX); 72 for (e = LDBL_MIN_EXP - LDBL_MANT_DIG; e < LDBL_MAX_EXP; e++) { 73 snprintf(buf, sizeof(buf), "0x1.p%d", e); 74 ld = strtold(buf, &end); 75 assert(*end == '\0'); 76 i = ilogbl(ld); 77 assert(i == e); 78 } 79 printf("PASS ilogbl\n"); 80 81 return (0); 82} 83