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 #define __HAVE_LONG_DOUBLE
59 ATF_TC_HEAD(strtod_basic, tc)
61 atf_tc_set_md_var(tc, "descr", "A basic test of strtod(3)");
64 ATF_TC_BODY(strtod_basic, tc)
66 static const size_t n = 1024 * 1000;
68 for (size_t i = 1; i < n; i = i + 1024) {
70 (void)snprintf(buf, sizeof(buf), "%zu.%zu", i, i + 1);
73 double d = strtod(buf, NULL);
76 ATF_REQUIRE(errno == 0);
81 ATF_TC_HEAD(strtod_hex, tc)
83 atf_tc_set_md_var(tc, "descr", "A strtod(3) with hexadecimals");
87 #define SMALL_NUM 1.0e-38
89 #define SMALL_NUM 1.0e-40
92 ATF_TC_BODY(strtod_hex, tc)
99 d = strtod(str, &end); /* -0.0 */
101 ATF_REQUIRE(end == str + 4);
102 ATF_REQUIRE(signbit(d) != 0);
103 ATF_REQUIRE(fabs(d) < SMALL_NUM);
106 d = strtod(str, &end); /* -0.0 */
108 ATF_REQUIRE(end == str + 2);
109 ATF_REQUIRE(signbit(d) != 0);
110 ATF_REQUIRE(fabs(d) < SMALL_NUM);
114 ATF_TC_HEAD(strtod_inf, tc)
116 atf_tc_set_md_var(tc, "descr", "A strtod(3) with INF (PR lib/33262)");
119 ATF_TC_BODY(strtod_inf, tc)
122 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
123 volatile double d = strtod(inf_strings[i], NULL);
124 ATF_REQUIRE(isinf(d) != 0);
127 atf_tc_skip("vax not supported");
132 ATF_TC_HEAD(strtof_inf, tc)
134 atf_tc_set_md_var(tc, "descr", "A strtof(3) with INF (PR lib/33262)");
137 ATF_TC_BODY(strtof_inf, tc)
140 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
141 volatile float f = strtof(inf_strings[i], NULL);
142 ATF_REQUIRE(isinf(f) != 0);
145 atf_tc_skip("vax not supported");
150 ATF_TC_HEAD(strtold_inf, tc)
152 atf_tc_set_md_var(tc, "descr", "A strtold(3) with INF (PR lib/33262)");
155 ATF_TC_BODY(strtold_inf, tc)
158 # ifdef __HAVE_LONG_DOUBLE
160 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
161 volatile long double ld = strtold(inf_strings[i], NULL);
162 ATF_REQUIRE(isinf(ld) != 0);
165 atf_tc_skip("Requires long double support");
168 atf_tc_skip("vax not supported");
173 ATF_TC_HEAD(strtod_nan, tc)
175 atf_tc_set_md_var(tc, "descr", "A strtod(3) with NaN");
178 ATF_TC_BODY(strtod_nan, tc)
183 volatile double d = strtod(nan_string, &end);
184 ATF_REQUIRE(isnan(d) != 0);
185 ATF_REQUIRE(strcmp(end, "y") == 0);
187 atf_tc_skip("vax not supported");
192 ATF_TC_HEAD(strtof_nan, tc)
194 atf_tc_set_md_var(tc, "descr", "A strtof(3) with NaN");
197 ATF_TC_BODY(strtof_nan, tc)
202 volatile float f = strtof(nan_string, &end);
203 ATF_REQUIRE(isnanf(f) != 0);
204 ATF_REQUIRE(strcmp(end, "y") == 0);
206 atf_tc_skip("vax not supported");
211 ATF_TC_HEAD(strtold_nan, tc)
213 atf_tc_set_md_var(tc, "descr", "A strtold(3) with NaN (PR lib/45020)");
216 ATF_TC_BODY(strtold_nan, tc)
219 # ifdef __HAVE_LONG_DOUBLE
223 volatile long double ld = strtold(nan_string, &end);
224 ATF_REQUIRE(isnan(ld) != 0);
226 ATF_REQUIRE(strcmp(end, "y") == 0);
228 ATF_REQUIRE(__isnanl(ld) != 0);
230 ATF_REQUIRE(strcmp(end, "y") == 0);
232 atf_tc_skip("Requires long double support");
235 atf_tc_skip("vax not supported");
239 ATF_TC(strtod_round);
240 ATF_TC_HEAD(strtod_round, tc)
242 atf_tc_set_md_var(tc, "descr", "Test rouding in strtod(3)");
245 ATF_TC_BODY(strtod_round, tc)
250 * Test that strtod(3) honors the current rounding mode.
251 * The used value is somewhere near 1 + DBL_EPSILON + FLT_EPSILON.
254 "1.00000011920928977282585492503130808472633361816406";
256 (void)fesetround(FE_UPWARD);
258 volatile double d1 = strtod(val, NULL);
260 (void)fesetround(FE_DOWNWARD);
262 volatile double d2 = strtod(val, NULL);
264 if (fabs(d1 - d2) > 0.0)
267 atf_tc_expect_fail("PR misc/44767");
268 atf_tc_fail("strtod(3) did not honor fesetround(3)");
271 atf_tc_skip("Requires <fenv.h> support");
275 ATF_TC(strtod_underflow);
276 ATF_TC_HEAD(strtod_underflow, tc)
278 atf_tc_set_md_var(tc, "descr", "Test underflow in strtod(3)");
281 ATF_TC_BODY(strtod_underflow, tc)
285 "0.0000000000000000000000000000000000000000000000000000"
286 "000000000000000000000000000000000000000000000000000000"
287 "000000000000000000000000000000000000000000000000000000"
288 "000000000000000000000000000000000000000000000000000000"
289 "000000000000000000000000000000000000000000000000000000"
290 "000000000000000000000000000000000000000000000000000000"
291 "000000000000000000000000000000000000000000000000000000"
292 "000000000000000002";
295 volatile double d = strtod(tmp, NULL);
297 if (d != 0 || errno != ERANGE)
298 atf_tc_fail("strtod(3) did not detect underflow");
302 * Bug found by Geza Herman.
304 * http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/
306 ATF_TC(strtod_gherman_bug);
307 ATF_TC_HEAD(strtod_gherman_bug, tc)
309 atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman");
312 ATF_TC_BODY(strtod_gherman_bug, tc)
316 "1.8254370818746402660437411213933955878019332885742187";
319 volatile double d = strtod(str, NULL);
321 ATF_CHECK(d == 0x1.d34fd8378ea83p+0);
327 ATF_TP_ADD_TC(tp, strtod_basic);
328 ATF_TP_ADD_TC(tp, strtod_hex);
329 ATF_TP_ADD_TC(tp, strtod_inf);
330 ATF_TP_ADD_TC(tp, strtof_inf);
331 ATF_TP_ADD_TC(tp, strtold_inf);
332 ATF_TP_ADD_TC(tp, strtod_nan);
333 ATF_TP_ADD_TC(tp, strtof_nan);
334 ATF_TP_ADD_TC(tp, strtold_nan);
335 ATF_TP_ADD_TC(tp, strtod_round);
336 ATF_TP_ADD_TC(tp, strtod_underflow);
337 ATF_TP_ADD_TC(tp, strtod_gherman_bug);
339 return atf_no_error();