misc/tst-efgcvt.c

   1 /* Copyright (C) 1998, 1999 Free Software Foundation, Inc.
   2    This file is part of the GNU C Library.
   3
   4    The GNU C Library is free software; you can redistribute it and/or
   5    modify it under the terms of the GNU Library General Public License as
   6    published by the Free Software Foundation; either version 2 of the
   7    License, or (at your option) any later version.
   8
   9    The GNU C Library is distributed in the hope that it will be useful,
  10    but WITHOUT ANY WARRANTY; without even the implied warranty of
  11    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
  12    Library General Public License for more details.
  13
  14    You should have received a copy of the GNU Library General Public
  15    License along with the GNU C Library; see the file COPYING.LIB.  If not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #ifndef _GNU_SOURCE
  20 # define _GNU_SOURCE    1
  21 #endif
  22
  23 #include <math.h>
  24 #include <stdio.h>
  25 #include <stdlib.h>
  26
  27 int error_count;
  28
  29 typedef struct
  30 {
  31   double value;
  32   int ndigit;
  33   int decpt;
  34   char result[30];
  35 } testcase;
  36
  37 typedef char * ((*efcvt_func) (double, int, int *, int *));
  38
  39 typedef int ((*efcvt_r_func) (double, int, int *, int *, char *, size_t));
  40
  41
  42 static testcase ecvt_tests[] =
  43 {
  44   { 0.0, 0, 1, "" },
  45   { 10.0, 0, 2, "" },
  46   { 10.0, 1, 2, "1" },
  47   { 10.0, 5, 2, "10000" },
  48   { -12.0, 5, 2, "12000" },
  49   { 0.2, 4, 0, "2000" },
  50   { 0.02, 4, -1, "2000" },
  51   { 5.5, 1, 1, "6" },
  52   { 1.0, -1, 1, "" },
  53   { 0.01, 2, -1, "10" },
  54   { 100.0, -2, 3, "" },
  55   { 100.0, -5, 3, "" },
  56   { 100.0, -4, 3, "" },
  57   { 100.01, -4, 3, "" },
  58   { 123.01, -4, 3, "" },
  59   { 126.71, -4, 3, "" },
  60   { 0.0, 4, 1, "0000" },
  61   /* -1.0 is end marker.  */
  62   { -1.0, 0, 0, "" }
  63 };
  64
  65 static testcase fcvt_tests[] =
  66 {
  67   { 0.0, 0, 1, "0" },
  68   { 10.0, 0, 2, "10" },
  69   { 10.0, 1, 2, "100" },
  70   { 10.0, 4, 2, "100000" },
  71   { -12.0, 5, 2, "1200000" },
  72   { 0.2, 4, 0, "2000" },
  73   { 0.02, 4, -1, "200" },
  74   { 5.5, 1, 1, "55" },
  75   { 5.5, 0, 1, "6" },
  76   { 0.01, 2, -1, "1" },
  77   { 100.0, -2, 3, "100" },
  78   { 100.0, -5, 3, "100" },
  79   { 100.0, -4, 3, "100" },
  80   { 100.01, -4, 3, "100" },
  81   { 123.01, -4, 3, "100" },
  82   { 126.71, -4, 3, "100" },
  83   /* -1.0 is end marker.  */
  84   { -1.0, 0, 0, "" }
  85 };
  86
  87 void
  88 output_error (const char *name, double value, int ndigit,
  89               const char *exp_p, int exp_decpt, int exp_sign,
  90               char *res_p, int res_decpt, int res_sign)
  91 {
  92   printf ("%s returned wrong result for value: %f, ndigits: %d\n",
  93           name, value, ndigit);
  94   printf ("Result was p: \"%s\", decpt: %d, sign: %d\n",
  95           res_p, res_decpt, res_sign);
  96   printf ("Should be  p: \"%s\", decpt: %d, sign: %d\n",
  97           exp_p, exp_decpt, exp_sign);
  98   ++error_count;
  99 }
 100
 101
 102 void
 103 output_r_error (const char *name, double value, int ndigit,
 104                 const char *exp_p, int exp_decpt, int exp_sign, int exp_return,
 105                 char *res_p, int res_decpt, int res_sign, int res_return)
 106 {
 107   printf ("%s returned wrong result for value: %f, ndigits: %d\n",
 108           name, value, ndigit);
 109   printf ("Result was buf: \"%s\", decpt: %d, sign: %d return value: %d\n",
 110           res_p, res_decpt, res_sign, res_return);
 111   printf ("Should be  buf: \"%s\", decpt: %d, sign: %d\n",
 112           exp_p, exp_decpt, exp_sign);
 113   ++error_count;
 114 }
 115
 116 void
 117 test (testcase tests[], efcvt_func efcvt, const char *name)
 118 {
 119   int no = 0;
 120   int decpt, sign;
 121   char *p;
 122
 123   while (tests[no].value != -1.0)
 124     {
 125       p = efcvt (tests[no].value, tests[no].ndigit, &decpt, &sign);
 126       if (decpt != tests[no].decpt
 127           || sign != (tests[no].value < 0)
 128           || strcmp (p, tests[no].result) != 0)
 129         output_error (name, tests[no].value, tests[no].ndigit,
 130                       tests[no].result, tests[no].decpt,
 131                       (tests[no].value < 0),
 132                       p, decpt, sign);
 133       ++no;
 134     }
 135 }
 136
 137 void
 138 test_r (testcase tests[], efcvt_r_func efcvt_r, const char *name)
 139 {
 140   int no = 0;
 141   int decpt, sign, res;
 142   char buf [1024];
 143
 144
 145   while (tests[no].value != -1.0)
 146     {
 147       res = efcvt_r (tests[no].value, tests[no].ndigit, &decpt, &sign,
 148                      buf, sizeof (buf));
 149       if (res != 0
 150           || decpt != tests[no].decpt
 151           || sign != (tests[no].value < 0)
 152           || strcmp (buf, tests[no].result) != 0)
 153         output_r_error (name, tests[no].value, tests[no].ndigit,
 154                         tests[no].result, tests[no].decpt, 0,
 155                         (tests[no].value < 0),
 156                         buf, decpt, sign, res);
 157       ++no;
 158     }
 159 }
 160
 161 void
 162 special (void)
 163 {
 164   int decpt, sign, res;
 165   char *p;
 166   char buf [1024];
 167
 168   p = ecvt (NAN, 10, &decpt, &sign);
 169   if (sign != 0 || strcmp (p, "nan") != 0)
 170     output_error ("ecvt", NAN, 10, "nan", 0, 0, p, decpt, sign);
 171
 172   p = ecvt (INFINITY, 10, &decpt, &sign);
 173   if (sign != 0 || strcmp (p, "inf") != 0)
 174     output_error ("ecvt", NAN, 10, "inf", 0, 0, p, decpt, sign);
 175
 176   /* Simply make sure these calls with large NDIGITs don't crash.  */
 177   (void) ecvt (123.456, 10000, &decpt, &sign);
 178   (void) fcvt (123.456, 10000, &decpt, &sign);
 179
 180   /* Some tests for for the reentrant functions.  */
 181   /* Use a too small buffer.  */
 182   res = ecvt_r (123.456, 10, &decpt, &sign, buf, 1);
 183   if (res == 0)
 184     {
 185       printf ("ecvt_r with a too small buffer was succesful.\n");
 186       ++error_count;
 187     }
 188   res = fcvt_r (123.456, 10, &decpt, &sign, buf, 1);
 189   if (res == 0)
 190     {
 191       printf ("fcvt_r with a too small buffer was succesful.\n");
 192       ++error_count;
 193     }
 194 }
 195
 196
 197 int
 198 main (void)
 199 {
 200   test (ecvt_tests, ecvt, "ecvt");
 201   test (fcvt_tests, fcvt, "fcvt");
 202   test_r (ecvt_tests, ecvt_r, "ecvt_r");
 203   test_r (fcvt_tests, fcvt_r, "fcvt_r");
 204   special ();
 205
 206   return error_count;
 207 }