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Diffstat (limited to 'lib/msun/tests/nan_test.c')
| -rw-r--r-- | lib/msun/tests/nan_test.c | 120 |
1 files changed, 120 insertions, 0 deletions
diff --git a/lib/msun/tests/nan_test.c b/lib/msun/tests/nan_test.c new file mode 100644 index 000000000000..32c5c39af0c1 --- /dev/null +++ b/lib/msun/tests/nan_test.c @@ -0,0 +1,120 @@ +/*- + * Copyright (C) 2007 David Schultz <das@FreeBSD.org> + * All rights reserved. + * + * Redistribution and use in source and binary forms, with or without + * modification, are permitted provided that the following conditions + * are met: + * 1. Redistributions of source code must retain the above copyright + * notice, this list of conditions and the following disclaimer. + * 2. Redistributions in binary form must reproduce the above copyright + * notice, this list of conditions and the following disclaimer in the + * documentation and/or other materials provided with the distribution. + * + * THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND + * ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE + * IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE + * ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE + * FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL + * DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS + * OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) + * HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT + * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY + * OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF + * SUCH DAMAGE. + */ + +/* + * Test for nan(), nanf(), and nanl(). We also test that strtod("nan(...)") + * and sscanf("nan(...)", ...) work identically. + */ + +#include <sys/param.h> +#include <fenv.h> +#include <float.h> +#include <locale.h> +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include "test-utils.h" + +static void +testnan(const char *nan_format) +{ + char nan_str[128]; + char *end; + long double ald[4]; + double ad[4]; + float af[4]; + unsigned i; + + snprintf(nan_str, sizeof(nan_str), "nan(%s)", nan_format); + for (i = 0; i < nitems(ad); i++) { + /* + * x86 has an 80-bit long double stored in 96 bits, + * so we need to initialize the memory for the memcmp() + * checks below to work. + */ + bzero(&af[i], sizeof(float)); + bzero(&ad[i], sizeof(double)); + bzero(&ald[i], sizeof(long double)); + } + + af[0] = nanf(nan_format); + ATF_REQUIRE(isnan(af[0])); + af[1] = strtof(nan_str, &end); + ATF_REQUIRE(end == nan_str + strlen(nan_str)); + ATF_REQUIRE(sscanf(nan_str, "%e", &af[2]) == 1); + ATF_REQUIRE(memcmp(&af[0], &af[1], sizeof(float)) == 0); + ATF_REQUIRE(memcmp(&af[1], &af[2], sizeof(float)) == 0); + if (*nan_format == '\0') { + /* nanf("") == strtof("nan") */ + af[3] = strtof("nan", NULL); + ATF_REQUIRE(memcmp(&af[2], &af[3], sizeof(float)) == 0); + } + + ad[0] = nan(nan_format); + ATF_REQUIRE(isnan(ad[0])); + ad[1] = strtod(nan_str, &end); + ATF_REQUIRE(end == nan_str + strlen(nan_str)); + ATF_REQUIRE(sscanf(nan_str, "%le", &ad[2]) == 1); + ATF_REQUIRE(memcmp(&ad[0], &ad[1], sizeof(double)) == 0); + ATF_REQUIRE(memcmp(&ad[1], &ad[2], sizeof(double)) == 0); + if (*nan_format == '\0') { + /* nan("") == strtod("nan") */ + ad[3] = strtod("nan", NULL); + ATF_REQUIRE(memcmp(&ad[2], &ad[3], sizeof(double)) == 0); + } + + ald[0] = nanl(nan_format); + ATF_REQUIRE(isnan(ald[0])); + ald[1] = strtold(nan_str, &end); + ATF_REQUIRE(end == nan_str + strlen(nan_str)); + ATF_REQUIRE(sscanf(nan_str, "%Le", &ald[2]) == 1); + ATF_REQUIRE(memcmp(&ald[0], &ald[1], sizeof(long double)) == 0); + ATF_REQUIRE(memcmp(&ald[1], &ald[2], sizeof(long double)) == 0); + if (*nan_format == '\0') { + /* nanl("") == strtold("nan") */ + ald[3] = strtold("nan", NULL); + ATF_REQUIRE(memcmp(&ald[2], &ald[3], sizeof(long double)) == 0); + } +} + +ATF_TC_WITHOUT_HEAD(nan); +ATF_TC_BODY(nan, tc) +{ + /* Die if a signalling NaN is returned */ + feenableexcept(FE_INVALID); + + testnan("0x1234"); + testnan(""); +} + +ATF_TP_ADD_TCS(tp) +{ + ATF_TP_ADD_TC(tp, nan); + + return (atf_no_error()); +} |