1 /* $NetBSD: t_convfp.c,v 1.1 2010/12/31 04:08:33 pgoyette Exp $ */ 2 3 /*- 4 * Copyright (c) 2003 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * Redistribution and use in source and binary forms, with or without 8 * modification, are permitted provided that the following conditions 9 * are met: 10 * 1. Redistributions of source code must retain the above copyright 11 * notice, this list of conditions and the following disclaimer. 12 * 2. Redistributions in binary form must reproduce the above copyright 13 * notice, this list of conditions and the following disclaimer in the 14 * documentation and/or other materials provided with the distribution. 15 * 16 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 17 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 18 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 19 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 20 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 21 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 22 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 23 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 24 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 25 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 26 * POSSIBILITY OF SUCH DAMAGE. 27 */ 28 29 #include <atf-c.h> 30 31 #include <limits.h> 32 #include <stdio.h> 33 #include <stdlib.h> 34 35 /* 36 * This value is representable as an unsigned int, but not as an int. 37 * According to ISO C it must survive the convsion back from a double 38 * to an unsigned int (everything > -1 and < UINT_MAX+1 has to) 39 */ 40 #define UINT_TESTVALUE (INT_MAX+42U) 41 42 /* The same for unsigned long */ 43 #define ULONG_TESTVALUE (LONG_MAX+42UL) 44 45 static void test1(); 46 static void test2(); 47 static void test3(); 48 49 ATF_TC(test1); 50 51 ATF_TC_HEAD(test1, tc) 52 { 53 54 atf_tc_set_md_var(tc, "descr", "test conversions to unsigned int/long"); 55 } 56 57 ATF_TC_BODY(test1, tc) 58 { 59 unsigned int ui; 60 unsigned long ul; 61 long double dt; 62 double d; 63 64 /* unsigned int test */ 65 d = UINT_TESTVALUE; 66 ui = (unsigned int)d; 67 68 if (ui != UINT_TESTVALUE) 69 atf_tc_fail("FAILED: unsigned int %u (0x%x) != %u (0x%x)\n", 70 ui, ui, UINT_TESTVALUE, UINT_TESTVALUE); 71 72 /* unsigned long vs. {long} double test */ 73 if (sizeof(d) > sizeof(ul)) { 74 d = ULONG_TESTVALUE; 75 ul = (unsigned long)d; 76 printf("testing double vs. long\n"); 77 } else if (sizeof(dt) > sizeof(ul)) { 78 dt = ULONG_TESTVALUE; 79 ul = (unsigned long)dt; 80 printf("testing long double vs. long\n"); 81 } else 82 atf_tc_skip("no suitable {long} double type found, skipping " 83 "\"unsigned long\" test\n" 84 "sizeof(long) = %d, sizeof(double) = %d, " 85 "sizeof(long double) = %d\n", 86 sizeof(ul), sizeof(d), sizeof(dt)); 87 88 if (ul != ULONG_TESTVALUE) { 89 atf_tc_fail("unsigned long %lu (0x%lx) != %lu (0x%lx)\n", 90 ul, ul, ULONG_TESTVALUE, ULONG_TESTVALUE); 91 exit(1); 92 } 93 } 94 95 ATF_TC(test2); 96 97 ATF_TC_HEAD(test2, tc) 98 { 99 100 atf_tc_set_md_var(tc, "descr", "test double to unsigned long cast"); 101 } 102 103 ATF_TC_BODY(test2, tc) 104 { 105 double nv; 106 unsigned long uv; 107 108 nv = 5.6; 109 uv = (unsigned long)nv; 110 111 ATF_REQUIRE_EQ_MSG(uv, 5, 112 "%.3f casted to unsigned long is %lu\n", nv, uv); 113 } 114 115 ATF_TC(test3); 116 117 ATF_TC_HEAD(test3, tc) 118 { 119 120 atf_tc_set_md_var(tc, "descr", 121 "test double/long double casts to unsigned long"); 122 } 123 124 ATF_TC_BODY(test3, tc) 125 { 126 double dv = 1.9; 127 long double ldv = dv; 128 unsigned long l1 = dv; 129 unsigned long l2 = ldv; 130 131 ATF_REQUIRE_EQ_MSG(l1, 1, 132 "double 1.9 casted to unsigned long should be 1, but is %lu\n", l1); 133 134 ATF_REQUIRE_EQ_MSG(l2, 1, 135 "long double 1.9 casted to unsigned long should be 1, but is %lu\n", 136 l2); 137 } 138 139 ATF_TP_ADD_TCS(tp) 140 { 141 142 ATF_TP_ADD_TC(tp, test1); 143 ATF_TP_ADD_TC(tp, test2); 144 ATF_TP_ADD_TC(tp, test3); 145 146 return atf_no_error(); 147 } 148