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| Current File : //usr/src/tools/regression/lib/libc/stdio/test-scanfloat.c |
/*-
* 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 <sys/cdefs.h>
__FBSDID("$FreeBSD: release/9.1.0/tools/regression/lib/libc/stdio/test-scanfloat.c 182711 2008-09-03 07:35:14Z das $");
#include <assert.h>
#include <fenv.h>
#include <float.h>
#include <locale.h>
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#define eq(type, a, b) _eq(type##_EPSILON, (a), (b))
static int _eq(long double epsilon, long double a, long double b);
int
main(int argc, char *argv[])
{
char buf[128];
long double ld = 0.0;
double d = 0.0;
float f = 0.0;
char *endp;
printf("1..4\n");
buf[0] = '\0';
assert(setlocale(LC_NUMERIC, ""));
/*
* Various tests for normalized numbers
*/
sscanf("3.141592", "%e", &f);
assert(eq(FLT, f, 3.141592));
sscanf("3.141592653589793", "%lf", &d);
assert(eq(DBL, d, 3.141592653589793));
sscanf("1.234568e+06", "%E", &f);
assert(eq(FLT, f, 1.234568e+06));
sscanf("-1.234568e6", "%lF", &d);
assert(eq(DBL, d, -1.234568e6));
sscanf("+1.234568e-52", "%LG", &ld);
assert(eq(LDBL, ld, 1.234568e-52L));
sscanf("0.1", "%la", &d);
assert(eq(DBL, d, 0.1));
sscanf("00.2", "%lA", &d);
assert(eq(DBL, d, 0.2));
sscanf("123456", "%5le%s", &d, buf);
assert(eq(DBL, d, 12345.));
assert(strcmp(buf, "6") == 0);
sscanf("1.0Q", "%*5le%s", buf);
assert(strcmp(buf, "Q") == 0);
sscanf("-1.23e", "%e%s", &f, buf);
assert(eq(FLT, f, -1.23));
assert(strcmp(buf, "e") == 0);
sscanf("1.25e+", "%le%s", &d, buf);
assert(eq(DBL, d, 1.25));
assert(strcmp(buf, "e+") == 0);
sscanf("1.23E4E5", "%le%s", &d, buf);
assert(eq(DBL, d, 1.23e4));
assert(strcmp(buf, "E5") == 0);
sscanf("12e6", "%le", &d);
assert(eq(DBL, d, 12e6));
sscanf("1.a", "%le%s", &d, buf);
assert(eq(DBL, d, 1.0));
assert(strcmp(buf, "a") == 0);
sscanf(".0p4", "%le%s", &d, buf);
assert(eq(DBL, d, 0.0));
assert(strcmp(buf, "p4") == 0);
d = 0.25;
assert(sscanf(".", "%le", &d) == 0);
assert(d == 0.25);
sscanf("0x08", "%le", &d);
assert(d == 0x8p0);
sscanf("0x90a.bcdefP+09a", "%le%s", &d, buf);
assert(d == 0x90a.bcdefp+09);
assert(strcmp(buf, "a") == 0);
#if (LDBL_MANT_DIG > DBL_MANT_DIG) && !defined(__i386__)
sscanf("3.14159265358979323846", "%Lg", &ld);
assert(eq(LDBL, ld, 3.14159265358979323846L));
sscanf(" 0X.0123456789abcdefffp-3g", "%Le%s", &ld, buf);
assert(ld == 0x0.0123456789abcdefffp-3L);
assert(strcmp(buf, "g") == 0);
#endif
sscanf("0xg", "%le%s", &d, buf);
assert(d == 0.0);
assert(strcmp(buf, "xg") == 0);
assert(setlocale(LC_NUMERIC, "ru_RU.ISO8859-5")); /* decimalpoint==, */
sscanf("1.23", "%le%s", &d, buf);
assert(d == 1.0);
assert(strcmp(buf, ".23") == 0);
sscanf("1,23", "%le", &d);
assert(d == 1.23);
assert(setlocale(LC_NUMERIC, ""));
printf("ok 1 - scanfloat\n");
/*
* Infinity and NaN tests
*/
sscanf("-Inf", "%le", &d);
assert(d < 0.0 && isinf(d));
sscanf("iNfInItY and beyond", "%le%s", &d, buf);
assert(d > 0.0 && isinf(d));
assert(strcmp(buf, " and beyond"));
sscanf("NaN", "%le", &d);
assert(isnan(d));
sscanf("NAN(123Y", "%le%s", &d, buf);
assert(isnan(d));
assert(strcmp(buf, "(123Y") == 0);
sscanf("nan(f00f)plugh", "%le%s", &d, buf);
assert(isnan(d));
assert(strcmp(buf, "plugh") == 0);
sscanf("-nan", "%le", &d);
assert(isnan(d));
/* Only quiet NaNs should be returned. */
sscanf("NaN", "%e", &f);
sscanf("nan", "%le", &d);
sscanf("nan", "%Le", &ld);
feclearexcept(FE_ALL_EXCEPT);
assert(f != f);
assert(d != d);
assert(ld != ld);
assert(fetestexcept(FE_INVALID) == 0);
sscanf("nan(1234)", "%e", &f);
sscanf("nan(1234)", "%le", &d);
sscanf("nan(1234)", "%Le", &ld);
feclearexcept(FE_ALL_EXCEPT);
assert(f != f);
assert(d != d);
assert(ld != ld);
/* POSIX says we should only generate quiet NaNs. */
assert(fetestexcept(FE_INVALID) == 0);
printf("ok 2 - scanfloat\n");
/*
* Rounding tests
*/
fesetround(FE_DOWNWARD);
sscanf("1.999999999999999999999999999999999", "%le", &d);
assert(d < 2.0);
sscanf("0x1.ffffffffffffffp0", "%le", &d);
assert(d < 2.0);
sscanf("1.999999999999999999999999999999999", "%Le", &ld);
assert(ld < 2.0);
sscanf("1.0571892669084007", "%le", &d);
assert(d == 0x1.0ea3f4af0dc59p0);
sscanf("-1.0571892669084007", "%le", &d);
assert(d == -0x1.0ea3f4af0dc5ap0);
sscanf("1.0571892669084010", "%le", &d);
assert(d == 0x1.0ea3f4af0dc5ap0);
sscanf("0x1.23p-5000", "%le", &d);
assert(d == 0.0);
sscanf("0x1.2345678p-1050", "%le", &d);
assert(d == 0x1.234567p-1050);
fesetround(FE_UPWARD);
sscanf("1.0571892669084007", "%le", &d);
assert(d == 0x1.0ea3f4af0dc5ap0);
sscanf("-1.0571892669084007", "%le", &d);
assert(d == -0x1.0ea3f4af0dc59p0);
sscanf("1.0571892669084010", "%le", &d);
assert(d == 0x1.0ea3f4af0dc5bp0);
sscanf("0x1.23p-5000", "%le", &d);
assert(d == 0x1p-1074);
sscanf("0x1.2345678p-1050", "%le", &d);
assert(d == 0x1.234568p-1050);
fesetround(FE_TOWARDZERO);
sscanf("1.0571892669084007", "%le", &d);
assert(d == 0x1.0ea3f4af0dc59p0);
sscanf("-1.0571892669084007", "%le", &d);
assert(d == -0x1.0ea3f4af0dc59p0);
sscanf("1.0571892669084010", "%le", &d);
assert(d == 0x1.0ea3f4af0dc5ap0);
sscanf("0x1.23p-5000", "%le", &d);
assert(d == 0.0);
sscanf("0x1.2345678p-1050", "%le", &d);
assert(d == 0x1.234567p-1050);
fesetround(FE_TONEAREST);
/* 1.0571892669084007 is slightly closer to 0x1.0ea3f4af0dc59p0 */
sscanf("1.0571892669084007", "%le", &d);
assert(d == 0x1.0ea3f4af0dc59p0);
sscanf("-1.0571892669084007", "%le", &d);
assert(d == -0x1.0ea3f4af0dc59p0);
sscanf("1.0571892669084010", "%le", &d);
assert(d == 0x1.0ea3f4af0dc5bp0);
/* strtod() should round small numbers to 0. */
sscanf("0x1.23p-5000", "%le", &d);
assert(d == 0.0);
/* Extra digits in a denormal shouldn't break anything. */
sscanf("0x1.2345678p-1050", "%le", &d);
assert(d == 0x1.234568p-1050);
printf("ok 3 - scanfloat\n");
/*
* Tests specific to strtod().
*/
assert(strtod("0xy", &endp) == 0);
assert(strcmp("xy", endp) == 0);
/* This used to cause an infinite loop and round the wrong way. */
fesetround(FE_DOWNWARD);
assert(strtof("3.5e38", &endp) == FLT_MAX);
assert(strtod("2e308", &endp) == DBL_MAX);
fesetround(FE_UPWARD);
assert(strtof("3.5e38", &endp) == INFINITY);
assert(strtod("2e308", &endp) == INFINITY);
fesetround(FE_TOWARDZERO);
assert(strtof("3.5e38", &endp) == FLT_MAX);
assert(strtod("2e308", &endp) == DBL_MAX);
fesetround(FE_TONEAREST);
assert(strtof("3.5e38", &endp) == INFINITY);
assert(strtod("2e308", &endp) == INFINITY);
printf("ok 4 - scanfloat\n");
return (0);
}
static int
_eq(long double epsilon, long double a, long double b)
{
long double delta;
delta = fabsl(a - b);
return (delta <= epsilon);
}