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Diffstat (limited to 'lib/libc/tests/stdio/scanfloat_test.c')
| -rw-r--r-- | lib/libc/tests/stdio/scanfloat_test.c | 313 |
1 files changed, 313 insertions, 0 deletions
diff --git a/lib/libc/tests/stdio/scanfloat_test.c b/lib/libc/tests/stdio/scanfloat_test.c new file mode 100644 index 000000000000..635d93d560b3 --- /dev/null +++ b/lib/libc/tests/stdio/scanfloat_test.c @@ -0,0 +1,313 @@ +/*- + * Copyright (C) 2003, 2005 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 scanf() floating point formats. + */ + +#include <fenv.h> +#include <float.h> +#include <locale.h> +#include <math.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> + +#include <atf-c.h> + +#define eq(type, a, b) _eq(type##_EPSILON, (a), (b)) +static int +_eq(long double epsilon, long double a, long double b) +{ + long double delta; + + delta = fabsl(a - b); + return (delta <= epsilon); +} + +ATF_TC_WITHOUT_HEAD(normalized_numbers); +ATF_TC_BODY(normalized_numbers, tc) +{ + char buf[128]; + long double ld = 0.0; + double d = 0.0; + float f = 0.0; + + buf[0] = '\0'; + ATF_REQUIRE(setlocale(LC_NUMERIC, "")); + + ATF_REQUIRE_EQ(1, sscanf("3.141592", "%e", &f)); + ATF_REQUIRE(eq(FLT, f, 3.141592)); + + ATF_REQUIRE_EQ(1, sscanf("3.141592653589793", "%lf", &d)); + ATF_REQUIRE(eq(DBL, d, 3.141592653589793)); + + ATF_REQUIRE_EQ(1, sscanf("1.234568e+06", "%E", &f)); + ATF_REQUIRE(eq(FLT, f, 1.234568e+06)); + + ATF_REQUIRE_EQ(1, sscanf("-1.234568e6", "%lF", &d)); + ATF_REQUIRE(eq(DBL, d, -1.234568e6)); + + ATF_REQUIRE_EQ(1, sscanf("+1.234568e-52", "%LG", &ld)); + ATF_REQUIRE(eq(LDBL, ld, 1.234568e-52L)); + + ATF_REQUIRE_EQ(1, sscanf("0.1", "%la", &d)); + ATF_REQUIRE(eq(DBL, d, 0.1)); + + ATF_REQUIRE_EQ(1, sscanf("00.2", "%lA", &d)); + ATF_REQUIRE(eq(DBL, d, 0.2)); + + ATF_REQUIRE_EQ(2, sscanf("123456", "%5le%s", &d, buf)); + ATF_REQUIRE(eq(DBL, d, 12345.)); + ATF_REQUIRE(strcmp(buf, "6") == 0); + + ATF_REQUIRE_EQ(1, sscanf("1.0Q", "%*5le%s", buf)); + ATF_REQUIRE(strcmp(buf, "Q") == 0); + + ATF_REQUIRE_EQ(2, sscanf("-1.23e", "%e%s", &f, buf)); + ATF_REQUIRE(eq(FLT, f, -1.23)); + ATF_REQUIRE(strcmp(buf, "e") == 0); + + ATF_REQUIRE_EQ(2, sscanf("1.25e+", "%le%s", &d, buf)); + ATF_REQUIRE(eq(DBL, d, 1.25)); + ATF_REQUIRE(strcmp(buf, "e+") == 0); + + ATF_REQUIRE_EQ(2, sscanf("1.23E4E5", "%le%s", &d, buf)); + ATF_REQUIRE(eq(DBL, d, 1.23e4)); + ATF_REQUIRE(strcmp(buf, "E5") == 0); + + ATF_REQUIRE_EQ(1, sscanf("12e6", "%le", &d)); + ATF_REQUIRE(eq(DBL, d, 12e6)); + + ATF_REQUIRE_EQ(2, sscanf("1.a", "%le%s", &d, buf)); + ATF_REQUIRE(eq(DBL, d, 1.0)); + ATF_REQUIRE(strcmp(buf, "a") == 0); + + ATF_REQUIRE_EQ(2, sscanf(".0p4", "%le%s", &d, buf)); + ATF_REQUIRE(eq(DBL, d, 0.0)); + ATF_REQUIRE(strcmp(buf, "p4") == 0); + + d = 0.25; + ATF_REQUIRE_EQ(0, sscanf(".", "%le", &d)); + ATF_REQUIRE(d == 0.25); + + ATF_REQUIRE_EQ(1, sscanf("0x08", "%le", &d)); + ATF_REQUIRE(d == 0x8p0); + + ATF_REQUIRE_EQ(2, sscanf("0x90a.bcdefP+09a", "%le%s", &d, buf)); + ATF_REQUIRE(d == 0x90a.bcdefp+09); + ATF_REQUIRE(strcmp(buf, "a") == 0); + +#if (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__) + ATF_REQUIRE_EQ(1, sscanf("3.14159265358979323846", "%Lg", &ld)); + ATF_REQUIRE(eq(LDBL, ld, 3.14159265358979323846L)); + + ATF_REQUIRE_EQ(2, sscanf(" 0X.0123456789abcdefffp-3g", "%Le%s", &ld, buf)); + ATF_REQUIRE(ld == 0x0.0123456789abcdefffp-3L); + ATF_REQUIRE(strcmp(buf, "g") == 0); +#endif + + ATF_REQUIRE_EQ(2, sscanf("0xg", "%le%s", &d, buf)); + ATF_REQUIRE(d == 0.0); + ATF_REQUIRE(strcmp(buf, "xg") == 0); + + ATF_REQUIRE(setlocale(LC_NUMERIC, "ru_RU.ISO8859-5")); /* decimalpoint==, */ + + ATF_REQUIRE_EQ(2, sscanf("1.23", "%le%s", &d, buf)); + ATF_REQUIRE(d == 1.0); + ATF_REQUIRE(strcmp(buf, ".23") == 0); + + ATF_REQUIRE_EQ(1, sscanf("1,23", "%le", &d)); + ATF_REQUIRE(d == 1.23); + + ATF_REQUIRE(setlocale(LC_NUMERIC, "")); +} + +ATF_TC_WITHOUT_HEAD(infinities_and_nans); +ATF_TC_BODY(infinities_and_nans, tc) +{ + char buf[128]; + long double ld = 0.0; + double d = 0.0; + float f = 0.0; + + ATF_REQUIRE(setlocale(LC_NUMERIC, "C")); + + ATF_REQUIRE_EQ(1, sscanf("-Inf", "%le", &d)); + ATF_REQUIRE(d < 0.0 && isinf(d)); + + ATF_REQUIRE_EQ(2, sscanf("iNfInItY and beyond", "%le%s", &d, buf)); + ATF_REQUIRE(d > 0.0 && isinf(d)); + ATF_REQUIRE(strcmp(buf, " and beyond")); + + ATF_REQUIRE_EQ(1, sscanf("NaN", "%le", &d)); + ATF_REQUIRE(isnan(d)); + + ATF_REQUIRE_EQ(2, sscanf("NAN(123Y", "%le%s", &d, buf)); + ATF_REQUIRE(isnan(d)); + ATF_REQUIRE(strcmp(buf, "(123Y") == 0); + + ATF_REQUIRE_EQ(2, sscanf("nan(f00f)plugh", "%le%s", &d, buf)); + ATF_REQUIRE(isnan(d)); + ATF_REQUIRE(strcmp(buf, "plugh") == 0); + + ATF_REQUIRE_EQ(1, sscanf("-nan", "%le", &d)); + ATF_REQUIRE(isnan(d)); + + /* Only quiet NaNs should be returned. */ + ATF_REQUIRE_EQ(1, sscanf("NaN", "%e", &f)); + ATF_REQUIRE_EQ(1, sscanf("nan", "%le", &d)); + ATF_REQUIRE_EQ(1, sscanf("nan", "%Le", &ld)); + ATF_REQUIRE_EQ(0, feclearexcept(FE_ALL_EXCEPT)); + ATF_REQUIRE(f != f); + ATF_REQUIRE(d != d); + ATF_REQUIRE(ld != ld); + ATF_REQUIRE(fetestexcept(FE_INVALID) == 0); + ATF_REQUIRE_EQ(1, sscanf("nan(1234)", "%e", &f)); + ATF_REQUIRE_EQ(1, sscanf("nan(1234)", "%le", &d)); + ATF_REQUIRE_EQ(1, sscanf("nan(1234)", "%Le", &ld)); + ATF_REQUIRE_EQ(0, feclearexcept(FE_ALL_EXCEPT)); + ATF_REQUIRE(f != f); + ATF_REQUIRE(d != d); + ATF_REQUIRE(ld != ld); + /* POSIX says we should only generate quiet NaNs. */ + ATF_REQUIRE(fetestexcept(FE_INVALID) == 0); +} + +ATF_TC_WITHOUT_HEAD(rounding_tests); +ATF_TC_BODY(rounding_tests, tc) +{ + long double ld = 0.0; + double d = 0.0; + + ATF_REQUIRE(setlocale(LC_NUMERIC, "C")); + + ATF_REQUIRE_EQ(0, fesetround(FE_DOWNWARD)); + + ATF_REQUIRE_EQ(1, sscanf("1.999999999999999999999999999999999", "%le", &d)); + ATF_REQUIRE(d < 2.0); + ATF_REQUIRE_EQ(1, sscanf("0x1.ffffffffffffffp0", "%le", &d)); + ATF_REQUIRE(d < 2.0); + ATF_REQUIRE_EQ(1, sscanf("1.999999999999999999999999999999999", "%Le", &ld)); + ATF_REQUIRE(ld < 2.0); + + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("-1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == -0x1.0ea3f4af0dc5ap0); + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084010", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0); + + ATF_REQUIRE_EQ(1, sscanf("0x1.23p-5000", "%le", &d)); + ATF_REQUIRE(d == 0.0); + + ATF_REQUIRE_EQ(1, sscanf("0x1.2345678p-1050", "%le", &d)); + ATF_REQUIRE(d == 0x1.234567p-1050); + + ATF_REQUIRE_EQ(0, fesetround(FE_UPWARD)); + + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0); + ATF_REQUIRE_EQ(1, sscanf("-1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084010", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc5bp0); + + ATF_REQUIRE_EQ(1, sscanf("0x1.23p-5000", "%le", &d)); + ATF_REQUIRE(d == 0x1p-1074); + + ATF_REQUIRE_EQ(1, sscanf("0x1.2345678p-1050", "%le", &d)); + ATF_REQUIRE(d == 0x1.234568p-1050); + + ATF_REQUIRE_EQ(0, fesetround(FE_TOWARDZERO)); + + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("-1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084010", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc5ap0); + + ATF_REQUIRE_EQ(1, sscanf("0x1.23p-5000", "%le", &d)); + ATF_REQUIRE(d == 0.0); + + ATF_REQUIRE_EQ(1, sscanf("0x1.2345678p-1050", "%le", &d)); + ATF_REQUIRE(d == 0x1.234567p-1050); + + ATF_REQUIRE_EQ(0, fesetround(FE_TONEAREST)); + + /* 1.0571892669084007 is slightly closer to 0x1.0ea3f4af0dc59p0 */ + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("-1.0571892669084007", "%le", &d)); + ATF_REQUIRE(d == -0x1.0ea3f4af0dc59p0); + ATF_REQUIRE_EQ(1, sscanf("1.0571892669084010", "%le", &d)); + ATF_REQUIRE(d == 0x1.0ea3f4af0dc5bp0); + + /* strtod() should round small numbers to 0. */ + ATF_REQUIRE_EQ(1, sscanf("0x1.23p-5000", "%le", &d)); + ATF_REQUIRE(d == 0.0); + + /* Extra digits in a denormal shouldn't break anything. */ + ATF_REQUIRE_EQ(1, sscanf("0x1.2345678p-1050", "%le", &d)); + ATF_REQUIRE(d == 0x1.234568p-1050); +} + +ATF_TC_WITHOUT_HEAD(strtod); +ATF_TC_BODY(strtod, tc) +{ + char *endp; + + ATF_REQUIRE(setlocale(LC_NUMERIC, "C")); + + ATF_REQUIRE(strtod("0xy", &endp) == 0); + ATF_REQUIRE(strcmp("xy", endp) == 0); + + /* This used to cause an infinite loop and round the wrong way. */ + ATF_REQUIRE_EQ(0, fesetround(FE_DOWNWARD)); + ATF_REQUIRE(strtof("3.5e38", &endp) == FLT_MAX); + ATF_REQUIRE(strtod("2e308", &endp) == DBL_MAX); + ATF_REQUIRE_EQ(0, fesetround(FE_UPWARD)); + ATF_REQUIRE(strtof("3.5e38", &endp) == INFINITY); + ATF_REQUIRE(strtod("2e308", &endp) == INFINITY); + ATF_REQUIRE_EQ(0, fesetround(FE_TOWARDZERO)); + ATF_REQUIRE(strtof("3.5e38", &endp) == FLT_MAX); + ATF_REQUIRE(strtod("2e308", &endp) == DBL_MAX); + ATF_REQUIRE_EQ(0, fesetround(FE_TONEAREST)); + ATF_REQUIRE(strtof("3.5e38", &endp) == INFINITY); + ATF_REQUIRE(strtod("2e308", &endp) == INFINITY); +} + +ATF_TP_ADD_TCS(tp) +{ + + ATF_TP_ADD_TC(tp, normalized_numbers); + ATF_TP_ADD_TC(tp, infinities_and_nans); + ATF_TP_ADD_TC(tp, rounding_tests); + ATF_TP_ADD_TC(tp, strtod); + + return (atf_no_error()); +} |