1 /* $NetBSD: t_strtod.c,v 1.31 2012/09/26 07:24:38 jruoho Exp $ */ 2 3 /*- 4 * Copyright (c) 2011 The NetBSD Foundation, Inc. 5 * All rights reserved. 6 * 7 * This code is derived from software contributed to The NetBSD Foundation 8 * by Jukka Ruohonen. 9 * 10 * Redistribution and use in source and binary forms, with or without 11 * modification, are permitted provided that the following conditions 12 * are met: 13 * 1. Redistributions of source code must retain the above copyright 14 * notice, this list of conditions and the following disclaimer. 15 * 2. Redistributions in binary form must reproduce the above copyright 16 * notice, this list of conditions and the following disclaimer in the 17 * documentation and/or other materials provided with the distribution. 18 * 19 * THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS 20 * ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED 21 * TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR 22 * PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS 23 * BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR 24 * CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF 25 * SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS 26 * INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN 27 * CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) 28 * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE 29 * POSSIBILITY OF SUCH DAMAGE. 30 */ 31 32 /* Public domain, Otto Moerbeek <otto@drijf.net>, 2006. */ 33 34 #include <sys/cdefs.h> 35 __RCSID("$NetBSD: t_strtod.c,v 1.31 2012/09/26 07:24:38 jruoho Exp $"); 36 37 #include <errno.h> 38 #include <math.h> 39 #include <stdio.h> 40 #include <stdlib.h> 41 #include <string.h> 42 43 #include <atf-c.h> 44 #include <atf-c/config.h> 45 46 #if defined(__i386__) || defined(__amd64__) || defined(__sparc__) 47 #include <fenv.h> 48 #endif 49 50 #if !defined(__vax__) 51 static const char * const inf_strings[] = 52 { "Inf", "INF", "-Inf", "-INF", "Infinity", "+Infinity", 53 "INFINITY", "-INFINITY", "InFiNiTy", "+InFiNiTy" }; 54 const char *nan_string = "NaN(x)y"; 55 #endif 56 57 ATF_TC(strtod_basic); 58 ATF_TC_HEAD(strtod_basic, tc) 59 { 60 atf_tc_set_md_var(tc, "descr", "A basic test of strtod(3)"); 61 } 62 63 ATF_TC_BODY(strtod_basic, tc) 64 { 65 static const size_t n = 1024 * 1000; 66 67 for (size_t i = 1; i < n; i = i + 1024) { 68 char buf[512]; 69 (void)snprintf(buf, sizeof(buf), "%zu.%zu", i, i + 1); 70 71 errno = 0; 72 double d = strtod(buf, NULL); 73 74 ATF_REQUIRE(d > 0.0); 75 ATF_REQUIRE(errno == 0); 76 } 77 } 78 79 ATF_TC(strtod_hex); 80 ATF_TC_HEAD(strtod_hex, tc) 81 { 82 atf_tc_set_md_var(tc, "descr", "A strtod(3) with hexadecimals"); 83 } 84 85 #ifdef __vax__ 86 #define SMALL_NUM 1.0e-38 87 #else 88 #define SMALL_NUM 1.0e-40 89 #endif 90 91 ATF_TC_BODY(strtod_hex, tc) 92 { 93 const char *str; 94 char *end; 95 volatile double d; 96 97 str = "-0x0"; 98 d = strtod(str, &end); /* -0.0 */ 99 100 ATF_REQUIRE(end == str + 4); 101 ATF_REQUIRE(signbit(d) != 0); 102 ATF_REQUIRE(fabs(d) < SMALL_NUM); 103 104 str = "-0x"; 105 d = strtod(str, &end); /* -0.0 */ 106 107 ATF_REQUIRE(end == str + 2); 108 ATF_REQUIRE(signbit(d) != 0); 109 ATF_REQUIRE(fabs(d) < SMALL_NUM); 110 } 111 112 ATF_TC(strtod_inf); 113 ATF_TC_HEAD(strtod_inf, tc) 114 { 115 atf_tc_set_md_var(tc, "descr", "A strtod(3) with INF (PR lib/33262)"); 116 } 117 118 ATF_TC_BODY(strtod_inf, tc) 119 { 120 #ifndef __vax__ 121 for (size_t i = 0; i < __arraycount(inf_strings); i++) { 122 volatile double d = strtod(inf_strings[i], NULL); 123 ATF_REQUIRE(isinf(d) != 0); 124 } 125 #else 126 atf_tc_skip("vax not supported"); 127 #endif 128 } 129 130 ATF_TC(strtof_inf); 131 ATF_TC_HEAD(strtof_inf, tc) 132 { 133 atf_tc_set_md_var(tc, "descr", "A strtof(3) with INF (PR lib/33262)"); 134 } 135 136 ATF_TC_BODY(strtof_inf, tc) 137 { 138 #ifndef __vax__ 139 for (size_t i = 0; i < __arraycount(inf_strings); i++) { 140 volatile float f = strtof(inf_strings[i], NULL); 141 ATF_REQUIRE(isinf(f) != 0); 142 } 143 #else 144 atf_tc_skip("vax not supported"); 145 #endif 146 } 147 148 ATF_TC(strtold_inf); 149 ATF_TC_HEAD(strtold_inf, tc) 150 { 151 atf_tc_set_md_var(tc, "descr", "A strtold(3) with INF (PR lib/33262)"); 152 } 153 154 ATF_TC_BODY(strtold_inf, tc) 155 { 156 #ifndef __vax__ 157 # ifdef __HAVE_LONG_DOUBLE 158 159 for (size_t i = 0; i < __arraycount(inf_strings); i++) { 160 volatile long double ld = strtold(inf_strings[i], NULL); 161 ATF_REQUIRE(isinf(ld) != 0); 162 } 163 # else 164 atf_tc_skip("Requires long double support"); 165 # endif 166 #else 167 atf_tc_skip("vax not supported"); 168 #endif 169 } 170 171 ATF_TC(strtod_nan); 172 ATF_TC_HEAD(strtod_nan, tc) 173 { 174 atf_tc_set_md_var(tc, "descr", "A strtod(3) with NaN"); 175 } 176 177 ATF_TC_BODY(strtod_nan, tc) 178 { 179 #ifndef __vax__ 180 char *end; 181 182 volatile double d = strtod(nan_string, &end); 183 ATF_REQUIRE(isnan(d) != 0); 184 ATF_REQUIRE(strcmp(end, "y") == 0); 185 #else 186 atf_tc_skip("vax not supported"); 187 #endif 188 } 189 190 ATF_TC(strtof_nan); 191 ATF_TC_HEAD(strtof_nan, tc) 192 { 193 atf_tc_set_md_var(tc, "descr", "A strtof(3) with NaN"); 194 } 195 196 ATF_TC_BODY(strtof_nan, tc) 197 { 198 #ifndef __vax__ 199 char *end; 200 201 volatile float f = strtof(nan_string, &end); 202 ATF_REQUIRE(isnanf(f) != 0); 203 ATF_REQUIRE(strcmp(end, "y") == 0); 204 #else 205 atf_tc_skip("vax not supported"); 206 #endif 207 } 208 209 ATF_TC(strtold_nan); 210 ATF_TC_HEAD(strtold_nan, tc) 211 { 212 atf_tc_set_md_var(tc, "descr", "A strtold(3) with NaN (PR lib/45020)"); 213 } 214 215 ATF_TC_BODY(strtold_nan, tc) 216 { 217 #ifndef __vax__ 218 # ifdef __HAVE_LONG_DOUBLE 219 220 char *end; 221 222 volatile long double ld = strtold(nan_string, &end); 223 ATF_REQUIRE(isnan(ld) != 0); 224 #if !defined(__FreeBSD__) 225 ATF_REQUIRE(__isnanl(ld) != 0); 226 #endif 227 ATF_REQUIRE(strcmp(end, "y") == 0); 228 # else 229 atf_tc_skip("Requires long double support"); 230 # endif 231 #else 232 atf_tc_skip("vax not supported"); 233 #endif 234 } 235 236 ATF_TC(strtod_round); 237 ATF_TC_HEAD(strtod_round, tc) 238 { 239 atf_tc_set_md_var(tc, "descr", "Test rouding in strtod(3)"); 240 } 241 242 ATF_TC_BODY(strtod_round, tc) 243 { 244 #if defined(__i386__) || defined(__amd64__) || defined(__sparc__) 245 246 /* 247 * Test that strtod(3) honors the current rounding mode. 248 * The used value is somewhere near 1 + DBL_EPSILON + FLT_EPSILON. 249 */ 250 const char *val = 251 "1.00000011920928977282585492503130808472633361816406"; 252 253 (void)fesetround(FE_UPWARD); 254 255 volatile double d1 = strtod(val, NULL); 256 257 (void)fesetround(FE_DOWNWARD); 258 259 volatile double d2 = strtod(val, NULL); 260 261 if (fabs(d1 - d2) > 0.0) 262 return; 263 else { 264 atf_tc_expect_fail("PR misc/44767"); 265 atf_tc_fail("strtod(3) did not honor fesetround(3)"); 266 } 267 #else 268 atf_tc_skip("Requires one of i386, amd64 or sparc"); 269 #endif 270 } 271 272 ATF_TC(strtod_underflow); 273 ATF_TC_HEAD(strtod_underflow, tc) 274 { 275 atf_tc_set_md_var(tc, "descr", "Test underflow in strtod(3)"); 276 } 277 278 ATF_TC_BODY(strtod_underflow, tc) 279 { 280 281 const char *tmp = 282 "0.0000000000000000000000000000000000000000000000000000" 283 "000000000000000000000000000000000000000000000000000000" 284 "000000000000000000000000000000000000000000000000000000" 285 "000000000000000000000000000000000000000000000000000000" 286 "000000000000000000000000000000000000000000000000000000" 287 "000000000000000000000000000000000000000000000000000000" 288 "000000000000000000000000000000000000000000000000000000" 289 "000000000000000002"; 290 291 errno = 0; 292 volatile double d = strtod(tmp, NULL); 293 294 if (d != 0 || errno != ERANGE) 295 atf_tc_fail("strtod(3) did not detect underflow"); 296 } 297 298 /* 299 * Bug found by Geza Herman. 300 * See 301 * http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/ 302 */ 303 ATF_TC(strtod_gherman_bug); 304 ATF_TC_HEAD(strtod_gherman_bug, tc) 305 { 306 atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman"); 307 } 308 309 ATF_TC_BODY(strtod_gherman_bug, tc) 310 { 311 312 const char *str = 313 "1.8254370818746402660437411213933955878019332885742187"; 314 315 errno = 0; 316 volatile double d = strtod(str, NULL); 317 318 ATF_CHECK(d == 0x1.d34fd8378ea83p+0); 319 } 320 321 ATF_TP_ADD_TCS(tp) 322 { 323 324 ATF_TP_ADD_TC(tp, strtod_basic); 325 ATF_TP_ADD_TC(tp, strtod_hex); 326 ATF_TP_ADD_TC(tp, strtod_inf); 327 ATF_TP_ADD_TC(tp, strtof_inf); 328 ATF_TP_ADD_TC(tp, strtold_inf); 329 ATF_TP_ADD_TC(tp, strtod_nan); 330 ATF_TP_ADD_TC(tp, strtof_nan); 331 ATF_TP_ADD_TC(tp, strtold_nan); 332 ATF_TP_ADD_TC(tp, strtod_round); 333 ATF_TP_ADD_TC(tp, strtod_underflow); 334 ATF_TP_ADD_TC(tp, strtod_gherman_bug); 335 336 return atf_no_error(); 337 } 338