333 lines
7.7 KiB
C
333 lines
7.7 KiB
C
/* $NetBSD: t_strtod.c,v 1.34 2015/12/22 14:19:25 christos Exp $ */
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/*-
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* Copyright (c) 2011 The NetBSD Foundation, Inc.
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* All rights reserved.
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*
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* This code is derived from software contributed to The NetBSD Foundation
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* by Jukka Ruohonen.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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*
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* THIS SOFTWARE IS PROVIDED BY THE NETBSD FOUNDATION, INC. AND CONTRIBUTORS
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* ``AS IS'' AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
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* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR
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* PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE FOUNDATION OR CONTRIBUTORS
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* BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR
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* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF
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* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS
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* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN
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* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE)
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* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE
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* POSSIBILITY OF SUCH DAMAGE.
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*/
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/* Public domain, Otto Moerbeek <otto@drijf.net>, 2006. */
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#include <sys/cdefs.h>
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__RCSID("$NetBSD: t_strtod.c,v 1.34 2015/12/22 14:19:25 christos Exp $");
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#include <errno.h>
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#include <math.h>
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <atf-c.h>
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#include <fenv.h>
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#if !defined(__vax__)
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static const char * const inf_strings[] =
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{ "Inf", "INF", "-Inf", "-INF", "Infinity", "+Infinity",
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"INFINITY", "-INFINITY", "InFiNiTy", "+InFiNiTy" };
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const char *nan_string = "NaN(x)y";
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#endif
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ATF_TC(strtod_basic);
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ATF_TC_HEAD(strtod_basic, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A basic test of strtod(3)");
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}
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ATF_TC_BODY(strtod_basic, tc)
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{
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static const size_t n = 1024 * 1000;
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for (size_t i = 1; i < n; i = i + 1024) {
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char buf[512];
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(void)snprintf(buf, sizeof(buf), "%zu.%zu", i, i + 1);
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errno = 0;
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double d = strtod(buf, NULL);
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ATF_REQUIRE(d > 0.0);
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ATF_REQUIRE(errno == 0);
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}
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}
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ATF_TC(strtod_hex);
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ATF_TC_HEAD(strtod_hex, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtod(3) with hexadecimals");
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}
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#ifdef __vax__
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#define SMALL_NUM 1.0e-38
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#else
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#define SMALL_NUM 1.0e-40
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#endif
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ATF_TC_BODY(strtod_hex, tc)
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{
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const char *str;
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char *end;
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volatile double d;
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str = "-0x0";
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d = strtod(str, &end); /* -0.0 */
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ATF_REQUIRE(end == str + 4);
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ATF_REQUIRE(signbit(d) != 0);
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ATF_REQUIRE(fabs(d) < SMALL_NUM);
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str = "-0x";
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d = strtod(str, &end); /* -0.0 */
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ATF_REQUIRE(end == str + 2);
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ATF_REQUIRE(signbit(d) != 0);
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ATF_REQUIRE(fabs(d) < SMALL_NUM);
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}
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ATF_TC(strtod_inf);
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ATF_TC_HEAD(strtod_inf, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtod(3) with INF (PR lib/33262)");
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}
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ATF_TC_BODY(strtod_inf, tc)
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{
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#ifndef __vax__
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for (size_t i = 0; i < __arraycount(inf_strings); i++) {
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volatile double d = strtod(inf_strings[i], NULL);
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ATF_REQUIRE(isinf(d) != 0);
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}
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtof_inf);
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ATF_TC_HEAD(strtof_inf, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtof(3) with INF (PR lib/33262)");
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}
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ATF_TC_BODY(strtof_inf, tc)
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{
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#ifndef __vax__
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for (size_t i = 0; i < __arraycount(inf_strings); i++) {
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volatile float f = strtof(inf_strings[i], NULL);
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ATF_REQUIRE(isinf(f) != 0);
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}
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtold_inf);
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ATF_TC_HEAD(strtold_inf, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtold(3) with INF (PR lib/33262)");
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}
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ATF_TC_BODY(strtold_inf, tc)
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{
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#ifndef __vax__
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# ifdef __HAVE_LONG_DOUBLE
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for (size_t i = 0; i < __arraycount(inf_strings); i++) {
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volatile long double ld = strtold(inf_strings[i], NULL);
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ATF_REQUIRE(isinf(ld) != 0);
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}
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# else
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atf_tc_skip("Requires long double support");
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# endif
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtod_nan);
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ATF_TC_HEAD(strtod_nan, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtod(3) with NaN");
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}
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ATF_TC_BODY(strtod_nan, tc)
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{
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#ifndef __vax__
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char *end;
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volatile double d = strtod(nan_string, &end);
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ATF_REQUIRE(isnan(d) != 0);
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ATF_REQUIRE(strcmp(end, "y") == 0);
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtof_nan);
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ATF_TC_HEAD(strtof_nan, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtof(3) with NaN");
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}
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ATF_TC_BODY(strtof_nan, tc)
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{
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#ifndef __vax__
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char *end;
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volatile float f = strtof(nan_string, &end);
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ATF_REQUIRE(isnanf(f) != 0);
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ATF_REQUIRE(strcmp(end, "y") == 0);
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtold_nan);
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ATF_TC_HEAD(strtold_nan, tc)
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{
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atf_tc_set_md_var(tc, "descr", "A strtold(3) with NaN (PR lib/45020)");
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}
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ATF_TC_BODY(strtold_nan, tc)
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{
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#ifndef __vax__
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# ifdef __HAVE_LONG_DOUBLE
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char *end;
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volatile long double ld = strtold(nan_string, &end);
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ATF_REQUIRE(isnan(ld) != 0);
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ATF_REQUIRE(__isnanl(ld) != 0);
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ATF_REQUIRE(strcmp(end, "y") == 0);
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# else
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atf_tc_skip("Requires long double support");
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# endif
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#else
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atf_tc_skip("vax not supported");
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#endif
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}
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ATF_TC(strtod_round);
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ATF_TC_HEAD(strtod_round, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test rouding in strtod(3)");
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}
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ATF_TC_BODY(strtod_round, tc)
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{
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#ifdef __HAVE_FENV
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/*
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* Test that strtod(3) honors the current rounding mode.
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* The used value is somewhere near 1 + DBL_EPSILON + FLT_EPSILON.
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*/
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const char *val =
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"1.00000011920928977282585492503130808472633361816406";
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(void)fesetround(FE_UPWARD);
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volatile double d1 = strtod(val, NULL);
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(void)fesetround(FE_DOWNWARD);
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volatile double d2 = strtod(val, NULL);
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if (fabs(d1 - d2) > 0.0)
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return;
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else {
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atf_tc_expect_fail("PR misc/44767");
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atf_tc_fail("strtod(3) did not honor fesetround(3)");
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}
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#else
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atf_tc_skip("Requires <fenv.h> support");
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#endif
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}
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ATF_TC(strtod_underflow);
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ATF_TC_HEAD(strtod_underflow, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test underflow in strtod(3)");
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}
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ATF_TC_BODY(strtod_underflow, tc)
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{
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const char *tmp =
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"0.0000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000000000000000000000000000000000000000000"
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"000000000000000002";
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errno = 0;
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volatile double d = strtod(tmp, NULL);
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if (d != 0 || errno != ERANGE)
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atf_tc_fail("strtod(3) did not detect underflow");
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}
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/*
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* Bug found by Geza Herman.
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* See
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* http://www.exploringbinary.com/a-bug-in-the-bigcomp-function-of-david-gays-strtod/
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*/
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ATF_TC(strtod_gherman_bug);
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ATF_TC_HEAD(strtod_gherman_bug, tc)
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{
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atf_tc_set_md_var(tc, "descr", "Test a bug found by Geza Herman");
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}
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ATF_TC_BODY(strtod_gherman_bug, tc)
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{
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const char *str =
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"1.8254370818746402660437411213933955878019332885742187";
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errno = 0;
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volatile double d = strtod(str, NULL);
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ATF_CHECK(d == 0x1.d34fd8378ea83p+0);
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}
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ATF_TP_ADD_TCS(tp)
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{
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ATF_TP_ADD_TC(tp, strtod_basic);
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ATF_TP_ADD_TC(tp, strtod_hex);
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ATF_TP_ADD_TC(tp, strtod_inf);
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ATF_TP_ADD_TC(tp, strtof_inf);
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ATF_TP_ADD_TC(tp, strtold_inf);
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ATF_TP_ADD_TC(tp, strtod_nan);
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ATF_TP_ADD_TC(tp, strtof_nan);
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ATF_TP_ADD_TC(tp, strtold_nan);
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ATF_TP_ADD_TC(tp, strtod_round);
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ATF_TP_ADD_TC(tp, strtod_underflow);
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ATF_TP_ADD_TC(tp, strtod_gherman_bug);
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return atf_no_error();
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}
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