1 /* $NetBSD: t_strtod.c,v 1.32 2014/11/04 00:20:19 justin 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 1.32 2014/11/04 00:20:19 justin Exp $");
45 #if defined(__i386__) || defined(__amd64__) || defined(__sparc__)
50 static const char * const inf_strings[] =
51 { "Inf", "INF", "-Inf", "-INF", "Infinity", "+Infinity",
52 "INFINITY", "-INFINITY", "InFiNiTy", "+InFiNiTy" };
53 const char *nan_string = "NaN(x)y";
57 #define __HAVE_LONG_DOUBLE
61 ATF_TC_HEAD(strtod_basic, tc)
63 atf_tc_set_md_var(tc, "descr", "A basic test of strtod(3)");
66 ATF_TC_BODY(strtod_basic, tc)
68 static const size_t n = 1024 * 1000;
70 for (size_t i = 1; i < n; i = i + 1024) {
72 (void)snprintf(buf, sizeof(buf), "%zu.%zu", i, i + 1);
75 double d = strtod(buf, NULL);
78 ATF_REQUIRE(errno == 0);
83 ATF_TC_HEAD(strtod_hex, tc)
85 atf_tc_set_md_var(tc, "descr", "A strtod(3) with hexadecimals");
89 #define SMALL_NUM 1.0e-38
91 #define SMALL_NUM 1.0e-40
94 ATF_TC_BODY(strtod_hex, tc)
101 d = strtod(str, &end); /* -0.0 */
103 ATF_REQUIRE(end == str + 4);
104 ATF_REQUIRE(signbit(d) != 0);
105 ATF_REQUIRE(fabs(d) < SMALL_NUM);
108 d = strtod(str, &end); /* -0.0 */
110 ATF_REQUIRE(end == str + 2);
111 ATF_REQUIRE(signbit(d) != 0);
112 ATF_REQUIRE(fabs(d) < SMALL_NUM);
116 ATF_TC_HEAD(strtod_inf, tc)
118 atf_tc_set_md_var(tc, "descr", "A strtod(3) with INF (PR lib/33262)");
121 ATF_TC_BODY(strtod_inf, tc)
124 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
125 volatile double d = strtod(inf_strings[i], NULL);
126 ATF_REQUIRE(isinf(d) != 0);
129 atf_tc_skip("vax not supported");
134 ATF_TC_HEAD(strtof_inf, tc)
136 atf_tc_set_md_var(tc, "descr", "A strtof(3) with INF (PR lib/33262)");
139 ATF_TC_BODY(strtof_inf, tc)
142 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
143 volatile float f = strtof(inf_strings[i], NULL);
144 ATF_REQUIRE(isinf(f) != 0);
147 atf_tc_skip("vax not supported");
152 ATF_TC_HEAD(strtold_inf, tc)
154 atf_tc_set_md_var(tc, "descr", "A strtold(3) with INF (PR lib/33262)");
157 ATF_TC_BODY(strtold_inf, tc)
160 # ifdef __HAVE_LONG_DOUBLE
162 for (size_t i = 0; i < __arraycount(inf_strings); i++) {
163 volatile long double ld = strtold(inf_strings[i], NULL);
164 ATF_REQUIRE(isinf(ld) != 0);
167 atf_tc_skip("Requires long double support");
170 atf_tc_skip("vax not supported");
175 ATF_TC_HEAD(strtod_nan, tc)
177 atf_tc_set_md_var(tc, "descr", "A strtod(3) with NaN");
180 ATF_TC_BODY(strtod_nan, tc)
185 volatile double d = strtod(nan_string, &end);
186 ATF_REQUIRE(isnan(d) != 0);
187 ATF_REQUIRE(strcmp(end, "y") == 0);
189 atf_tc_skip("vax not supported");
194 ATF_TC_HEAD(strtof_nan, tc)
196 atf_tc_set_md_var(tc, "descr", "A strtof(3) with NaN");
199 ATF_TC_BODY(strtof_nan, tc)
204 volatile float f = strtof(nan_string, &end);
205 ATF_REQUIRE(isnanf(f) != 0);
206 ATF_REQUIRE(strcmp(end, "y") == 0);
208 atf_tc_skip("vax not supported");
213 ATF_TC_HEAD(strtold_nan, tc)
215 atf_tc_set_md_var(tc, "descr", "A strtold(3) with NaN (PR lib/45020)");
218 ATF_TC_BODY(strtold_nan, tc)
221 # ifdef __HAVE_LONG_DOUBLE
225 volatile long double ld = strtold(nan_string, &end);
226 ATF_REQUIRE(isnan(ld) != 0);
228 ATF_REQUIRE(strcmp(end, "y") == 0);
230 ATF_REQUIRE(__isnanl(ld) != 0);
232 ATF_REQUIRE(strcmp(end, "y") == 0);
234 atf_tc_skip("Requires long double support");
237 atf_tc_skip("vax not supported");
241 ATF_TC(strtod_round);
242 ATF_TC_HEAD(strtod_round, tc)
244 atf_tc_set_md_var(tc, "descr", "Test rouding in strtod(3)");
247 ATF_TC_BODY(strtod_round, tc)
249 #if defined(__i386__) || defined(__amd64__) || defined(__sparc__)
252 * Test that strtod(3) honors the current rounding mode.
253 * The used value is somewhere near 1 + DBL_EPSILON + FLT_EPSILON.
256 "1.00000011920928977282585492503130808472633361816406";
258 (void)fesetround(FE_UPWARD);
260 volatile double d1 = strtod(val, NULL);
262 (void)fesetround(FE_DOWNWARD);
264 volatile double d2 = strtod(val, NULL);
266 if (fabs(d1 - d2) > 0.0)
269 atf_tc_expect_fail("PR misc/44767");
270 atf_tc_fail("strtod(3) did not honor fesetround(3)");
273 atf_tc_skip("Requires one of i386, amd64 or sparc");
277 ATF_TC(strtod_underflow);
278 ATF_TC_HEAD(strtod_underflow, tc)
280 atf_tc_set_md_var(tc, "descr", "Test underflow in strtod(3)");
283 ATF_TC_BODY(strtod_underflow, tc)
287 "0.0000000000000000000000000000000000000000000000000000"
288 "000000000000000000000000000000000000000000000000000000"
289 "000000000000000000000000000000000000000000000000000000"
290 "000000000000000000000000000000000000000000000000000000"
291 "000000000000000000000000000000000000000000000000000000"
292 "000000000000000000000000000000000000000000000000000000"
293 "000000000000000000000000000000000000000000000000000000"
294 "000000000000000002";
297 volatile double d = strtod(tmp, NULL);
299 if (d != 0 || errno != ERANGE)
300 atf_tc_fail("strtod(3) did not detect underflow");
304 * Bug found by Geza Herman.
306 * http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/
308 ATF_TC(strtod_gherman_bug);
309 ATF_TC_HEAD(strtod_gherman_bug, tc)
311 atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman");
314 ATF_TC_BODY(strtod_gherman_bug, tc)
318 "1.8254370818746402660437411213933955878019332885742187";
321 volatile double d = strtod(str, NULL);
323 ATF_CHECK(d == 0x1.d34fd8378ea83p+0);
329 ATF_TP_ADD_TC(tp, strtod_basic);
330 ATF_TP_ADD_TC(tp, strtod_hex);
331 ATF_TP_ADD_TC(tp, strtod_inf);
332 ATF_TP_ADD_TC(tp, strtof_inf);
333 ATF_TP_ADD_TC(tp, strtold_inf);
334 ATF_TP_ADD_TC(tp, strtod_nan);
335 ATF_TP_ADD_TC(tp, strtof_nan);
336 ATF_TP_ADD_TC(tp, strtold_nan);
337 ATF_TP_ADD_TC(tp, strtod_round);
338 ATF_TP_ADD_TC(tp, strtod_underflow);
339 ATF_TP_ADD_TC(tp, strtod_gherman_bug);
341 return atf_no_error();