glib/tests/strtod-test.c
Matthias Clasen c92fb33b42 Handle numbers like 1e1, nan, -infinity. Also try harder to preserve
2004-11-04  Matthias Clasen  <mclasen@redhat.com>

	* glib/gstrfuncs.c (g_ascii_strtod): Handle numbers like
	1e1, nan, -infinity. Also try harder to preserve errno.
	(#156421, Morten Welinder)

	* tests/strtod-test.c: Add testcases.
2004-11-05 03:21:24 +00:00

90 lines
3.2 KiB
C

#undef G_DISABLE_ASSERT
#undef G_LOG_DOMAIN
/* for NAN and INFINITY */
#define _ISOC99_SOURCE
#include <glib.h>
#include <locale.h>
#include <string.h>
#include <stdlib.h>
#include <math.h>
void
test_string (char *number, double res, gboolean check_end, int correct_len)
{
double d;
char *locales[] = {"sv_SE", "en_US", "fa_IR", "C", "ru_RU"};
int l;
char *end;
char *dummy;
/* we try a copy of number, with some free space for malloc before that.
* This is supposed to smash the some wrong pointer calculations. */
dummy = g_malloc (100000);
number = g_strdup (number);
g_free (dummy);
for (l = 0; l < G_N_ELEMENTS (locales); l++)
{
setlocale (LC_NUMERIC, locales[l]);
d = g_ascii_strtod (number, &end);
if ((isfinite(d) && isfinite(res) && d != res) ||
(isnan (d) != isnan (res)) ||
(isinf (d) != isinf (res)))
{
g_print ("g_ascii_strtod on \"%s\" for locale %s failed\n", number, locales[l]);
g_print ("expected %lf (nan %d inf %d) actual %lf (nan %d inf %d)\n",
res, isnan (res), isinf (res),
d, isnan (d), isinf (d));
}
if (check_end && end - number != correct_len)
g_print ("g_ascii_strtod on \"%s\" for locale %s endptr was wrong, leftover: %s\n", number, locales[l], end);
if (!check_end && end - number != strlen (number))
g_print ("g_ascii_strtod on \"%s\" for locale %s endptr was wrong, leftover: %s\n", number, locales[l], end);
}
g_free (number);
}
int
main ()
{
gdouble d;
char buffer[G_ASCII_DTOSTR_BUF_SIZE];
test_string ("123.123", 123.123, FALSE, 0);
test_string ("123.123e2", 123.123e2, FALSE, 0);
test_string ("123.123e-2", 123.123e-2, FALSE, 0);
test_string ("-123.123", -123.123, FALSE, 0);
test_string ("-123.123e2", -123.123e2, FALSE, 0);
test_string ("-123.123e-2", -123.123e-2, FALSE, 0);
test_string ("5.4", 5.4, TRUE, 3);
test_string ("5.4,5.5", 5.4, TRUE, 3);
test_string ("5,4", 5.0, TRUE, 1);
/* the following are for #156421 */
test_string ("1e1", 1e1, FALSE, 0);
test_string ("NAN", NAN, FALSE, 0);
test_string ("-nan", -NAN, FALSE, 0);
test_string ("INF", INFINITY, FALSE, 0);
test_string ("-infinity", -INFINITY, FALSE, 0);
d = 179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0;
g_assert (d == g_ascii_strtod (g_ascii_dtostr (buffer, sizeof (buffer), d), NULL));
d = -179769313486231570814527423731704356798070567525844996598917476803157260780028538760589558632766878171540458953514382464234321326889464182768467546703537516986049910576551282076245490090389328944075868508455133942304583236903222948165808559332123348274797826204144723168738177180919299881250404026184124858368.0;
g_assert (d == g_ascii_strtod (g_ascii_dtostr (buffer, sizeof (buffer), d), NULL));
d = pow (2.0, -1024.1);
g_assert (d == g_ascii_strtod (g_ascii_dtostr (buffer, sizeof (buffer), d), NULL));
d = -pow (2.0, -1024.1);
g_assert (d == g_ascii_strtod (g_ascii_dtostr (buffer, sizeof (buffer), d), NULL));
return 0;
}