/* Copyright (C) 1998-2018 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

   <http://www.gnu.org/licenses/>.  */

#ifndef _GNU_SOURCE

# define _GNU_SOURCE	1

#endif

#include <float.h>

#include <math.h>

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

int error_count;

typedef struct

{

  double value;

  int ndigit;

  int decpt;

  char result[30];

} testcase;

typedef char * ((*efcvt_func) (double, int, int *, int *));

typedef int ((*efcvt_r_func) (double, 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" },

#if DBL_MANT_DIG == 53

  { 0x1p-1074, 3, -323, "494" },

  { -0x1p-1074, 3, -323, "494" },

#endif

  /* -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, double 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: %f, 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);

  ++error_count;

}

static void

output_r_error (const char *name, double 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: %f, 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);

  ++error_count;

}

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 ("ecvt", NAN, 10, "nan", 0, 0, p, decpt, sign);

  p = ecvt (INFINITY, 10, &decpt, &sign;;

  if (sign != 0 || strcmp (p, "inf") != 0)

    output_error ("ecvt", INFINITY, 10, "inf", 0, 0, p, decpt, sign);

  /* Simply make sure these calls with large NDIGITs don't crash.  */

  (void) ecvt (123.456, 10000, &decpt, &sign;;

  (void) 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 ("ecvt_r with a too small buffer was succesful.\n");

      ++error_count;

    }

  res = fcvt_r (123.456, 10, &decpt, &sign, buf, 1);

  if (res == 0)

    {

      printf ("fcvt_r with a too small buffer was succesful.\n");

      ++error_count;

    }

}

static int

do_test (void)

{

  test (ecvt_tests, ecvt, "ecvt");

  test (fcvt_tests, fcvt, "fcvt");

  test_r (ecvt_tests, ecvt_r, "ecvt_r");

  test_r (fcvt_tests, fcvt_r, "fcvt_r");

  special ();

  return error_count;

}

#define TEST_FUNCTION do_test ()

#include "../test-skeleton.c"