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/* Copyright (C) 1998-2023 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/>. */
/* This template provides testing for the *cvt family of functions,
which deal with double or long double types. In order to use the
template, the following macros must be defined before inclusion of
this template:
FLOAT: The floating-point type, i.e. double or long double.
ECVT: Appropriate *ecvt function for FLOAT, i.e. ecvt or qecvt.
FCVT: Likewise for *fcvt, i.e. fcvt or qfcvt.
ECVT_R: Likewise for *ecvt_r, i.e. ecvt_r or qecvt_r.
FCVT_R: Likewise for *fcvt_r, i.e. fcvt_r or qfcvt_r.
PRINTF_CONVERSION: The appropriate printf conversion specifier with
length modifier for FLOAT, i.e. "%f" or "%Lf".
EXTRA_ECVT_TESTS: Additional tests for the ecvt or qecvt function
that are only relevant to a particular floating-point type and
cannot be represented generically. */
#ifndef _GNU_SOURCE
# define _GNU_SOURCE 1
#endif
#include <math.h>
#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <support/check.h>
#define NAME(x) NAMEX(x)
#define NAMEX(x) #x
typedef struct
{
FLOAT value;
int ndigit;
int decpt;
char result[30];
} testcase;
typedef char * ((*efcvt_func) (FLOAT, int, int *, int *));
typedef int ((*efcvt_r_func) (FLOAT, int, int *, int *, char *, size_t));
static testcase ecvt_tests[] =
{
{ 0.0, 0, 1, "" },
{ 10.0, 0, 2, "" },
{ 10.0, 1, 2, "1" },
{ 10.0, 5, 2, "10000" },
{ -12.0, 5, 2, "12000" },
{ 0.2, 4, 0, "2000" },
{ 0.02, 4, -1, "2000" },
{ 5.5, 1, 1, "6" },
{ 1.0, -1, 1, "" },
{ 0.01, 2, -1, "10" },
{ 100.0, -2, 3, "" },
{ 100.0, -5, 3, "" },
{ 100.0, -4, 3, "" },
{ 100.01, -4, 3, "" },
{ 123.01, -4, 3, "" },
{ 126.71, -4, 3, "" },
{ 0.0, 4, 1, "0000" },
EXTRA_ECVT_TESTS
/* -1.0 is end marker. */
{ -1.0, 0, 0, "" }
};
static testcase fcvt_tests[] =
{
{ 0.0, 0, 1, "0" },
{ 10.0, 0, 2, "10" },
{ 10.0, 1, 2, "100" },
{ 10.0, 4, 2, "100000" },
{ -12.0, 5, 2, "1200000" },
{ 0.2, 4, 0, "2000" },
{ 0.02, 4, -1, "200" },
{ 5.5, 1, 1, "55" },
{ 5.5, 0, 1, "6" },
{ 0.01, 2, -1, "1" },
{ 100.0, -2, 3, "100" },
{ 100.0, -5, 3, "100" },
{ 100.0, -4, 3, "100" },
{ 100.01, -4, 3, "100" },
{ 123.01, -4, 3, "100" },
{ 126.71, -4, 3, "100" },
{ 322.5, 16, 3, "3225000000000000000" },
/* -1.0 is end marker. */
{ -1.0, 0, 0, "" }
};
static void
output_error (const char *name, FLOAT value, int ndigit,
const char *exp_p, int exp_decpt, int exp_sign,
char *res_p, int res_decpt, int res_sign)
{
printf ("%s returned wrong result for value: " PRINTF_CONVERSION
", ndigits: %d\n",
name, value, ndigit);
printf ("Result was p: \"%s\", decpt: %d, sign: %d\n",
res_p, res_decpt, res_sign);
printf ("Should be p: \"%s\", decpt: %d, sign: %d\n",
exp_p, exp_decpt, exp_sign);
support_record_failure ();
}
static void
output_r_error (const char *name, FLOAT value, int ndigit,
const char *exp_p, int exp_decpt, int exp_sign, int exp_return,
char *res_p, int res_decpt, int res_sign, int res_return)
{
printf ("%s returned wrong result for value: " PRINTF_CONVERSION
", ndigits: %d\n",
name, value, ndigit);
printf ("Result was buf: \"%s\", decpt: %d, sign: %d return value: %d\n",
res_p, res_decpt, res_sign, res_return);
printf ("Should be buf: \"%s\", decpt: %d, sign: %d\n",
exp_p, exp_decpt, exp_sign);
support_record_failure ();
}
static void
test (testcase tests[], efcvt_func efcvt, const char *name)
{
int no = 0;
int decpt, sign;
char *p;
while (tests[no].value != -1.0)
{
p = efcvt (tests[no].value, tests[no].ndigit, &decpt, &sign);
if (decpt != tests[no].decpt
|| sign != (tests[no].value < 0)
|| strcmp (p, tests[no].result) != 0)
output_error (name, tests[no].value, tests[no].ndigit,
tests[no].result, tests[no].decpt,
(tests[no].value < 0),
p, decpt, sign);
++no;
}
}
static void
test_r (testcase tests[], efcvt_r_func efcvt_r, const char *name)
{
int no = 0;
int decpt, sign, res;
char buf [1024];
while (tests[no].value != -1.0)
{
res = efcvt_r (tests[no].value, tests[no].ndigit, &decpt, &sign,
buf, sizeof (buf));
if (res != 0
|| decpt != tests[no].decpt
|| sign != (tests[no].value < 0)
|| strcmp (buf, tests[no].result) != 0)
output_r_error (name, tests[no].value, tests[no].ndigit,
tests[no].result, tests[no].decpt, 0,
(tests[no].value < 0),
buf, decpt, sign, res);
++no;
}
}
static void
special (void)
{
int decpt, sign, res;
char *p;
char buf [1024];
p = ECVT (NAN, 10, &decpt, &sign);
if (sign != 0 || strcmp (p, "nan") != 0)
output_error (NAME (ECVT), NAN, 10, "nan", 0, 0, p, decpt, sign);
p = ECVT (INFINITY, 10, &decpt, &sign);
if (sign != 0 || strcmp (p, "inf") != 0)
output_error (NAME (ECVT), INFINITY, 10, "inf", 0, 0, p, decpt, sign);
/* Simply make sure these calls with large NDIGITs don't crash. */
p = ECVT (123.456, 10000, &decpt, &sign);
p = FCVT (123.456, 10000, &decpt, &sign);
/* Some tests for the reentrant functions. */
/* Use a too small buffer. */
res = ECVT_R (123.456, 10, &decpt, &sign, buf, 1);
if (res == 0)
{
printf (NAME (ECVT_R) " with a too small buffer was successful.\n");
support_record_failure ();
}
res = FCVT_R (123.456, 10, &decpt, &sign, buf, 1);
if (res == 0)
{
printf (NAME (FCVT_R) " with a too small buffer was successful.\n");
support_record_failure ();
}
}
static int
do_test (void)
{
test (ecvt_tests, ECVT, NAME (ECVT));
test (fcvt_tests, FCVT, NAME (FCVT));
test_r (ecvt_tests, ECVT_R, NAME (ECVT_R));
test_r (fcvt_tests, FCVT_R, NAME (FCVT_R));
special ();
return 0;
}
#include <support/test-driver.c>
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