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/* Basic tests for strtod.
Copyright (C) 1991-2021 Free Software Foundation, Inc.
This file is part of the GNU C Library.
The GNU C Library is free software; you can redistribute it and/or
modify it under the terms of the GNU Lesser General Public
License as published by the Free Software Foundation; either
version 2.1 of the License, or (at your option) any later version.
The GNU C Library is distributed in the hope that it will be useful,
but WITHOUT ANY WARRANTY; without even the implied warranty of
MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
Lesser General Public License for more details.
You should have received a copy of the GNU Lesser General Public
License along with the GNU C Library; if not, see
<https://www.gnu.org/licenses/>. */
#include <ctype.h>
#include <locale.h>
#include <stddef.h>
#include <stdio.h>
#include <stdlib.h>
#include <errno.h>
#include <string.h>
#include <math.h>
struct ltest
{
const char *str; /* Convert this. */
double expect; /* To get this. */
char left; /* With this left over. */
int err; /* And this in errno. */
};
static const struct ltest tests[] =
{
{ "12.345", 12.345, '\0', 0 },
{ "12.345e19", 12.345e19, '\0', 0 },
{ "-.1e+9", -.1e+9, '\0', 0 },
{ ".125", .125, '\0', 0 },
{ "1e20", 1e20, '\0', 0 },
{ "0e-19", 0, '\0', 0 },
{ "4\00012", 4.0, '\0', 0 },
{ "5.9e-76", 5.9e-76, '\0', 0 },
{ "0x1.4p+3", 10.0, '\0', 0 },
{ "0xAp0", 10.0, '\0', 0 },
{ "0x0Ap0", 10.0, '\0', 0 },
{ "0x0A", 10.0, '\0', 0 },
{ "0xA0", 160.0, '\0', 0 },
{ "0x0.A0p8", 160.0, '\0', 0 },
{ "0x0.50p9", 160.0, '\0', 0 },
{ "0x0.28p10", 160.0, '\0', 0 },
{ "0x0.14p11", 160.0, '\0', 0 },
{ "0x0.0A0p12", 160.0, '\0', 0 },
{ "0x0.050p13", 160.0, '\0', 0 },
{ "0x0.028p14", 160.0, '\0', 0 },
{ "0x0.014p15", 160.0, '\0', 0 },
{ "0x00.00A0p16", 160.0, '\0', 0 },
{ "0x00.0050p17", 160.0, '\0', 0 },
{ "0x00.0028p18", 160.0, '\0', 0 },
{ "0x00.0014p19", 160.0, '\0', 0 },
{ "0x1p-1023",
1.11253692925360069154511635866620203210960799023116591527666e-308,
'\0', 0 },
{ "0x0.8p-1022",
1.11253692925360069154511635866620203210960799023116591527666e-308,
'\0', 0 },
{ "Inf", HUGE_VAL, '\0', 0 },
{ "-Inf", -HUGE_VAL, '\0', 0 },
{ "+InFiNiTy", HUGE_VAL, '\0', 0 },
{ "0x80000Ap-23", 0x80000Ap-23, '\0', 0 },
{ "1e-324", 0, '\0', ERANGE },
{ "0x100000000000008p0", 0x1p56, '\0', 0 },
{ "0x100000000000008.p0", 0x1p56, '\0', 0 },
{ "0x100000000000008.00p0", 0x1p56, '\0', 0 },
{ "0x10000000000000800p0", 0x1p64, '\0', 0 },
{ "0x10000000000000801p0", 0x1.0000000000001p64, '\0', 0 },
{ NULL, 0, '\0', 0 }
};
static void expand (char *dst, int c);
static int long_dbl (void);
static int
do_test (void)
{
char buf[100];
const struct ltest *lt;
char *ep;
int status = 0;
int save_errno;
for (lt = tests; lt->str != NULL; ++lt)
{
double d;
errno = 0;
d = strtod(lt->str, &ep);
save_errno = errno;
printf ("strtod (\"%s\") test %u",
lt->str, (unsigned int) (lt - tests));
if (d == lt->expect && *ep == lt->left && save_errno == lt->err)
puts ("\tOK");
else
{
puts ("\tBAD");
if (d != lt->expect)
printf (" returns %.60g, expected %.60g\n", d, lt->expect);
if (lt->left != *ep)
{
char exp1[5], exp2[5];
expand (exp1, *ep);
expand (exp2, lt->left);
printf (" leaves '%s', expected '%s'\n", exp1, exp2);
}
if (save_errno != lt->err)
printf (" errno %d (%s) instead of %d (%s)\n",
save_errno, strerror (save_errno),
lt->err, strerror (lt->err));
status = 1;
}
}
sprintf (buf, "%f", strtod ("-0.0", NULL));
if (strcmp (buf, "-0.000000") != 0)
{
printf (" strtod (\"-0.0\", NULL) returns \"%s\"\n", buf);
status = 1;
}
const char input[] = "3752432815e-39";
float f1 = strtold (input, NULL);
float f2;
float f3 = strtof (input, NULL);
sscanf (input, "%g", &f2);
if (f1 != f2)
{
printf ("f1 = %a != f2 = %a\n", f1, f2);
status = 1;
}
if (f1 != f3)
{
printf ("f1 = %a != f3 = %a\n", f1, f3);
status = 1;
}
if (f2 != f3)
{
printf ("f2 = %a != f3 = %a\n", f2, f3);
status = 1;
}
const char input2[] = "+1.000000000116415321826934814453125";
if (strtold (input2, NULL) != +1.000000000116415321826934814453125L)
{
printf ("input2: %La != %La\n", strtold (input2, NULL),
+1.000000000116415321826934814453125L);
status = 1;
}
static struct { const char *str; long double l; } ltests[] =
{
{ "42.0000000000000000001", 42.0000000000000000001L },
{ "42.00000000000000000001", 42.00000000000000000001L },
{ "42.000000000000000000001", 42.000000000000000000001L }
};
int n;
for (n = 0; n < sizeof (ltests) / sizeof (ltests[0]); ++n)
if (strtold (ltests[n].str, NULL) != ltests[n].l)
{
printf ("ltests[%d]: %La != %La\n", n,
strtold (ltests[n].str, NULL), ltests[n].l);
status = 1;
}
status |= long_dbl ();
return status ? EXIT_FAILURE : EXIT_SUCCESS;
}
static void
expand (char *dst, int c)
{
if (isprint (c))
{
dst[0] = c;
dst[1] = '\0';
}
else
(void) sprintf (dst, "%#.3o", (unsigned int) c);
}
static int
long_dbl (void)
{
/* Regenerate this string using
echo '(2^53-1)*2^(1024-53)' | bc | sed 's/\([^\]*\)\\*$/ "\1"/'
*/
static const char longestdbl[] =
"17976931348623157081452742373170435679807056752584499659891747680315"
"72607800285387605895586327668781715404589535143824642343213268894641"
"82768467546703537516986049910576551282076245490090389328944075868508"
"45513394230458323690322294816580855933212334827479782620414472316873"
"8177180919299881250404026184124858368";
double d = strtod (longestdbl, NULL);
printf ("strtod (\"%s\", NULL) = %g\n", longestdbl, d);
if (d != 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.000000)
return 1;
return 0;
}
#include <support/test-driver.c>
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