1 /*- 2 * Copyright (c) 2004 Stefan Farfeleder 3 * All rights reserved. 4 * 5 * Redistribution and use in source and binary forms, with or without 6 * modification, are permitted provided that the following conditions 7 * are met: 8 * 1. Redistributions of source code must retain the above copyright 9 * notice, this list of conditions and the following disclaimer. 10 * 2. Redistributions in binary form must reproduce the above copyright 11 * notice, this list of conditions and the following disclaimer in the 12 * documentation and/or other materials provided with the distribution. 13 * 14 * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND 15 * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE 16 * 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 * $FreeBSD$ 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 36 int 37 main(void) 38 { 39 char buf[128], *end; 40 double d; 41 float f; 42 long double ld; 43 int e, i; 44 45 printf("1..3\n"); 46 assert(ilogb(0) == FP_ILOGB0); 47 assert(ilogb(NAN) == FP_ILOGBNAN); 48 assert(ilogb(INFINITY) == INT_MAX); 49 for (e = DBL_MIN_EXP - DBL_MANT_DIG; e < DBL_MAX_EXP; e++) { 50 snprintf(buf, sizeof(buf), "0x1.p%d", e); 51 d = strtod(buf, &end); 52 assert(*end == '\0'); 53 i = ilogb(d); 54 assert(i == e); 55 } 56 printf("ok 1 - ilogb\n"); 57 58 assert(ilogbf(0) == FP_ILOGB0); 59 assert(ilogbf(NAN) == FP_ILOGBNAN); 60 assert(ilogbf(INFINITY) == INT_MAX); 61 for (e = FLT_MIN_EXP - FLT_MANT_DIG; e < FLT_MAX_EXP; e++) { 62 snprintf(buf, sizeof(buf), "0x1.p%d", e); 63 f = strtof(buf, &end); 64 assert(*end == '\0'); 65 i = ilogbf(f); 66 assert(i == e); 67 } 68 printf("ok 2 - ilogbf\n"); 69 70 assert(ilogbl(0) == FP_ILOGB0); 71 assert(ilogbl(NAN) == FP_ILOGBNAN); 72 assert(ilogbl(INFINITY) == INT_MAX); 73 for (e = LDBL_MIN_EXP - LDBL_MANT_DIG; e < LDBL_MAX_EXP; e++) { 74 snprintf(buf, sizeof(buf), "0x1.p%d", e); 75 ld = strtold(buf, &end); 76 assert(*end == '\0'); 77 i = ilogbl(ld); 78 assert(i == e); 79 } 80 printf("ok 3 - ilogbl\n"); 81 82 return (0); 83 } 84