about summary refs log tree commit diff
path: root/misc/tst-efgcvt.c
blob: 74dd6bd8d3c0f1ea3f2f9de2be2e3fb8bf68cc45 (plain) (blame)
1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
/* Copyright (C) 1998, 1999 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 Library General Public License as
   published by the Free Software Foundation; either version 2 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
   Library General Public License for more details.

   You should have received a copy of the GNU Library General Public
   License along with the GNU C Library; see the file COPYING.LIB.  If not,
   write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
   Boston, MA 02111-1307, USA.  */

#ifndef _GNU_SOURCE
# define _GNU_SOURCE	1
#endif

#include <math.h>
#include <stdio.h>
#include <stdlib.h>

int error_count;

typedef struct
{
  double value;
  int ndigit;
  int decpt;
  char result[30];
} testcase;

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


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" },
  /* -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" },
  /* -1.0 is end marker.  */
  { -1.0, 0, 0, "" }
};

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;
}

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;
    }
}

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", NAN, 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 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;
    }
}


int
main (void)
{
  test (ecvt_tests, ecvt, "ecvt");
  test (fcvt_tests, fcvt, "fcvt");
  special ();

  return error_count;
}