misc/tst-efgcvt.c

   1 /* Copyright (C) 1998, 1999, 2000 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 Lesser General Public
   6    License as published by the Free Software Foundation; either
   7    version 2.1 of the 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    Lesser General Public License for more details.
  13
  14    You should have received a copy of the GNU Lesser General Public
  15    License along with the GNU C Library; if not, write to the Free
  16    Software Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA
  17    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 #include <string.h>
  27
  28 int error_count;
  29
  30 typedef struct
  31 {
  32   double value;
  33   int ndigit;
  34   int decpt;
  35   char result[30];
  36 } testcase;
  37
  38 typedef char * ((*efcvt_func) (double, int, int *, int *));
  39
  40 typedef int ((*efcvt_r_func) (double, int, int *, int *, char *, size_t));
  41
  42
  43 static testcase ecvt_tests[] =
  44 {
  45   { 0.0, 0, 1, "" },
  46   { 10.0, 0, 2, "" },
  47   { 10.0, 1, 2, "1" },
  48   { 10.0, 5, 2, "10000" },
  49   { -12.0, 5, 2, "12000" },
  50   { 0.2, 4, 0, "2000" },
  51   { 0.02, 4, -1, "2000" },
  52   { 5.5, 1, 1, "6" },
  53   { 1.0, -1, 1, "" },
  54   { 0.01, 2, -1, "10" },
  55   { 100.0, -2, 3, "" },
  56   { 100.0, -5, 3, "" },
  57   { 100.0, -4, 3, "" },
  58   { 100.01, -4, 3, "" },
  59   { 123.01, -4, 3, "" },
  60   { 126.71, -4, 3, "" },
  61   { 0.0, 4, 1, "0000" },
  62   /* -1.0 is end marker.  */
  63   { -1.0, 0, 0, "" }
  64 };
  65
  66 static testcase fcvt_tests[] =
  67 {
  68   { 0.0, 0, 1, "0" },
  69   { 10.0, 0, 2, "10" },
  70   { 10.0, 1, 2, "100" },
  71   { 10.0, 4, 2, "100000" },
  72   { -12.0, 5, 2, "1200000" },
  73   { 0.2, 4, 0, "2000" },
  74   { 0.02, 4, -1, "200" },
  75   { 5.5, 1, 1, "55" },
  76   { 5.5, 0, 1, "6" },
  77   { 0.01, 2, -1, "1" },
  78   { 100.0, -2, 3, "100" },
  79   { 100.0, -5, 3, "100" },
  80   { 100.0, -4, 3, "100" },
  81   { 100.01, -4, 3, "100" },
  82   { 123.01, -4, 3, "100" },
  83   { 126.71, -4, 3, "100" },
  84   { 322.5, 16, 3, "3225000000000000000" },
  85   /* -1.0 is end marker.  */
  86   { -1.0, 0, 0, "" }
  87 };
  88
  89 static void
  90 output_error (const char *name, double value, int ndigit,
  91               const char *exp_p, int exp_decpt, int exp_sign,
  92               char *res_p, int res_decpt, int res_sign)
  93 {
  94   printf ("%s returned wrong result for value: %f, ndigits: %d\n",
  95           name, value, ndigit);
  96   printf ("Result was p: \"%s\", decpt: %d, sign: %d\n",
  97           res_p, res_decpt, res_sign);
  98   printf ("Should be  p: \"%s\", decpt: %d, sign: %d\n",
  99           exp_p, exp_decpt, exp_sign);
 100   ++error_count;
 101 }
 102
 103
 104 static void
 105 output_r_error (const char *name, double value, int ndigit,
 106                 const char *exp_p, int exp_decpt, int exp_sign, int exp_return,
 107                 char *res_p, int res_decpt, int res_sign, int res_return)
 108 {
 109   printf ("%s returned wrong result for value: %f, ndigits: %d\n",
 110           name, value, ndigit);
 111   printf ("Result was buf: \"%s\", decpt: %d, sign: %d return value: %d\n",
 112           res_p, res_decpt, res_sign, res_return);
 113   printf ("Should be  buf: \"%s\", decpt: %d, sign: %d\n",
 114           exp_p, exp_decpt, exp_sign);
 115   ++error_count;
 116 }
 117
 118 static void
 119 test (testcase tests[], efcvt_func efcvt, const char *name)
 120 {
 121   int no = 0;
 122   int decpt, sign;
 123   char *p;
 124
 125   while (tests[no].value != -1.0)
 126     {
 127       p = efcvt (tests[no].value, tests[no].ndigit, &decpt, &sign);
 128       if (decpt != tests[no].decpt
 129           || sign != (tests[no].value < 0)
 130           || strcmp (p, tests[no].result) != 0)
 131         output_error (name, tests[no].value, tests[no].ndigit,
 132                       tests[no].result, tests[no].decpt,
 133                       (tests[no].value < 0),
 134                       p, decpt, sign);
 135       ++no;
 136     }
 137 }
 138
 139 static void
 140 test_r (testcase tests[], efcvt_r_func efcvt_r, const char *name)
 141 {
 142   int no = 0;
 143   int decpt, sign, res;
 144   char buf [1024];
 145
 146
 147   while (tests[no].value != -1.0)
 148     {
 149       res = efcvt_r (tests[no].value, tests[no].ndigit, &decpt, &sign,
 150                      buf, sizeof (buf));
 151       if (res != 0
 152           || decpt != tests[no].decpt
 153           || sign != (tests[no].value < 0)
 154           || strcmp (buf, tests[no].result) != 0)
 155         output_r_error (name, tests[no].value, tests[no].ndigit,
 156                         tests[no].result, tests[no].decpt, 0,
 157                         (tests[no].value < 0),
 158                         buf, decpt, sign, res);
 159       ++no;
 160     }
 161 }
 162
 163 static void
 164 special (void)
 165 {
 166   int decpt, sign, res;
 167   char *p;
 168   char buf [1024];
 169
 170   p = ecvt (NAN, 10, &decpt, &sign);
 171   if (sign != 0 || strcmp (p, "nan") != 0)
 172     output_error ("ecvt", NAN, 10, "nan", 0, 0, p, decpt, sign);
 173
 174   p = ecvt (INFINITY, 10, &decpt, &sign);
 175   if (sign != 0 || strcmp (p, "inf") != 0)
 176     output_error ("ecvt", NAN, 10, "inf", 0, 0, p, decpt, sign);
 177
 178   /* Simply make sure these calls with large NDIGITs don't crash.  */
 179   (void) ecvt (123.456, 10000, &decpt, &sign);
 180   (void) fcvt (123.456, 10000, &decpt, &sign);
 181
 182   /* Some tests for for the reentrant functions.  */
 183   /* Use a too small buffer.  */
 184   res = ecvt_r (123.456, 10, &decpt, &sign, buf, 1);
 185   if (res == 0)
 186     {
 187       printf ("ecvt_r with a too small buffer was succesful.\n");
 188       ++error_count;
 189     }
 190   res = fcvt_r (123.456, 10, &decpt, &sign, buf, 1);
 191   if (res == 0)
 192     {
 193       printf ("fcvt_r with a too small buffer was succesful.\n");
 194       ++error_count;
 195     }
 196 }
 197
 198
 199 int
 200 main (void)
 201 {
 202   test (ecvt_tests, ecvt, "ecvt");
 203   test (fcvt_tests, fcvt, "fcvt");
 204   test_r (ecvt_tests, ecvt_r, "ecvt_r");
 205   test_r (fcvt_tests, fcvt_r, "fcvt_r");
 206   special ();
 207
 208   return error_count;
 209 }