1 /* $NetBSD: t_strtod.c,v 1.34 2015/12/22 14:19:25 christos Exp $ */
4 * Copyright (c) 2011 The NetBSD Foundation, Inc.
7 * This code is derived from software contributed to The NetBSD Foundation
10 * Redistribution and use in source and binary forms, with or without
11 * modification, are permitted provided that the following conditions
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.
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.
32 /* Public domain, Otto Moerbeek <otto@drijf.net>, 2006. */
34 #include <sys/cdefs.h>
35 __RCSID("$NetBSD: t_strtod.c,v 1.34 2015/12/22 14:19:25 christos Exp $");
48 static const char * const inf_strings[] =
49 { "Inf", "INF", "-Inf", "-INF", "Infinity", "+Infinity",
50 "INFINITY", "-INFINITY", "InFiNiTy", "+InFiNiTy" };
51 const char *nan_string = "NaN(x)y";
55 ATF_TC_HEAD(strtod_basic, tc)
57 atf_tc_set_md_var(tc, "descr", "A basic test of strtod(3)");
60 ATF_TC_BODY(strtod_basic, tc)
62 static const size_t n = 1024 * 1000;
64 for (size_t i = 1; i < n; i = i + 1024) {
66 (void)snprintf(buf, sizeof(buf), "%zu.%zu", i, i + 1);
69 double d = strtod(buf, NULL);
72 ATF_REQUIRE(errno == 0);
77 ATF_TC_HEAD(strtod_hex, tc)
79 atf_tc_set_md_var(tc, "descr", "A strtod(3) with hexadecimals");
83 #define SMALL_NUM 1.0e-38
85 #define SMALL_NUM 1.0e-40
88 ATF_TC_BODY(strtod_hex, tc)
95 d = strtod(str, &end); /* -0.0 */
97 ATF_REQUIRE(end == str + 4);
98 ATF_REQUIRE(signbit(d) != 0);
99 ATF_REQUIRE(fabs(d) < SMALL_NUM);
102 d = strtod(str, &end); /* -0.0 */
104 ATF_REQUIRE(end == str + 2);
105 ATF_REQUIRE(signbit(d) != 0);
106 ATF_REQUIRE(fabs(d) < SMALL_NUM);
110 ATF_TC_HEAD(strtod_inf, tc)
112 atf_tc_set_md_var(tc, "descr", "A strtod(3) with INF (PR lib/33262)");
115 ATF_TC_BODY(strtod_inf, tc)
118 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
119 volatile double d = strtod(inf_strings[i], NULL);
120 ATF_REQUIRE(isinf(d) != 0);
123 atf_tc_skip("vax not supported");
128 ATF_TC_HEAD(strtof_inf, tc)
130 atf_tc_set_md_var(tc, "descr", "A strtof(3) with INF (PR lib/33262)");
133 ATF_TC_BODY(strtof_inf, tc)
136 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
137 volatile float f = strtof(inf_strings[i], NULL);
138 ATF_REQUIRE(isinf(f) != 0);
141 atf_tc_skip("vax not supported");
146 ATF_TC_HEAD(strtold_inf, tc)
148 atf_tc_set_md_var(tc, "descr", "A strtold(3) with INF (PR lib/33262)");
151 ATF_TC_BODY(strtold_inf, tc)
154 # ifdef __HAVE_LONG_DOUBLE
156 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
157 volatile long double ld = strtold(inf_strings[i], NULL);
158 ATF_REQUIRE(isinf(ld) != 0);
161 atf_tc_skip("Requires long double support");
164 atf_tc_skip("vax not supported");
169 ATF_TC_HEAD(strtod_nan, tc)
171 atf_tc_set_md_var(tc, "descr", "A strtod(3) with NaN");
174 ATF_TC_BODY(strtod_nan, tc)
179 volatile double d = strtod(nan_string, &end);
180 ATF_REQUIRE(isnan(d) != 0);
181 ATF_REQUIRE(strcmp(end, "y") == 0);
183 atf_tc_skip("vax not supported");
188 ATF_TC_HEAD(strtof_nan, tc)
190 atf_tc_set_md_var(tc, "descr", "A strtof(3) with NaN");
193 ATF_TC_BODY(strtof_nan, tc)
198 volatile float f = strtof(nan_string, &end);
199 ATF_REQUIRE(isnanf(f) != 0);
200 ATF_REQUIRE(strcmp(end, "y") == 0);
202 atf_tc_skip("vax not supported");
207 ATF_TC_HEAD(strtold_nan, tc)
209 atf_tc_set_md_var(tc, "descr", "A strtold(3) with NaN (PR lib/45020)");
212 ATF_TC_BODY(strtold_nan, tc)
215 # ifdef __HAVE_LONG_DOUBLE
219 volatile long double ld = strtold(nan_string, &end);
220 ATF_REQUIRE(isnan(ld) != 0);
222 ATF_REQUIRE(strcmp(end, "y") == 0);
224 ATF_REQUIRE(__isnanl(ld) != 0);
226 ATF_REQUIRE(strcmp(end, "y") == 0);
228 atf_tc_skip("Requires long double support");
231 atf_tc_skip("vax not supported");
235 ATF_TC(strtod_round);
236 ATF_TC_HEAD(strtod_round, tc)
238 atf_tc_set_md_var(tc, "descr", "Test rouding in strtod(3)");
241 ATF_TC_BODY(strtod_round, tc)
246 * Test that strtod(3) honors the current rounding mode.
247 * The used value is somewhere near 1 + DBL_EPSILON + FLT_EPSILON.
250 "1.00000011920928977282585492503130808472633361816406";
252 (void)fesetround(FE_UPWARD);
254 volatile double d1 = strtod(val, NULL);
256 (void)fesetround(FE_DOWNWARD);
258 volatile double d2 = strtod(val, NULL);
260 if (fabs(d1 - d2) > 0.0)
263 atf_tc_expect_fail("PR misc/44767");
264 atf_tc_fail("strtod(3) did not honor fesetround(3)");
267 atf_tc_skip("Requires <fenv.h> support");
271 ATF_TC(strtod_underflow);
272 ATF_TC_HEAD(strtod_underflow, tc)
274 atf_tc_set_md_var(tc, "descr", "Test underflow in strtod(3)");
277 ATF_TC_BODY(strtod_underflow, tc)
281 "0.0000000000000000000000000000000000000000000000000000"
282 "000000000000000000000000000000000000000000000000000000"
283 "000000000000000000000000000000000000000000000000000000"
284 "000000000000000000000000000000000000000000000000000000"
285 "000000000000000000000000000000000000000000000000000000"
286 "000000000000000000000000000000000000000000000000000000"
287 "000000000000000000000000000000000000000000000000000000"
288 "000000000000000002";
291 volatile double d = strtod(tmp, NULL);
293 if (d != 0 || errno != ERANGE)
294 atf_tc_fail("strtod(3) did not detect underflow");
298 * Bug found by Geza Herman.
300 * http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/
302 ATF_TC(strtod_gherman_bug);
303 ATF_TC_HEAD(strtod_gherman_bug, tc)
305 atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman");
308 ATF_TC_BODY(strtod_gherman_bug, tc)
312 "1.8254370818746402660437411213933955878019332885742187";
315 volatile double d = strtod(str, NULL);
317 ATF_CHECK(d == 0x1.d34fd8378ea83p+0);
323 ATF_TP_ADD_TC(tp, strtod_basic);
324 ATF_TP_ADD_TC(tp, strtod_hex);
325 ATF_TP_ADD_TC(tp, strtod_inf);
326 ATF_TP_ADD_TC(tp, strtof_inf);
327 ATF_TP_ADD_TC(tp, strtold_inf);
328 ATF_TP_ADD_TC(tp, strtod_nan);
329 ATF_TP_ADD_TC(tp, strtof_nan);
330 ATF_TP_ADD_TC(tp, strtold_nan);
331 ATF_TP_ADD_TC(tp, strtod_round);
332 ATF_TP_ADD_TC(tp, strtod_underflow);
333 ATF_TP_ADD_TC(tp, strtod_gherman_bug);
335 return atf_no_error();