contrib/gdtoa/test/dtest.c

   1 /****************************************************************
   2
   3 The author of this software is David M. Gay.
   4
   5 Copyright (C) 1998-2001 by Lucent Technologies
   6 All Rights Reserved
   7
   8 Permission to use, copy, modify, and distribute this software and
   9 its documentation for any purpose and without fee is hereby
  10 granted, provided that the above copyright notice appear in all
  11 copies and that both that the copyright notice and this
  12 permission notice and warranty disclaimer appear in supporting
  13 documentation, and that the name of Lucent or any of its entities
  14 not be used in advertising or publicity pertaining to
  15 distribution of the software without specific, written prior
  16 permission.
  17
  18 LUCENT DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE,
  19 INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS.
  20 IN NO EVENT SHALL LUCENT OR ANY OF ITS ENTITIES BE LIABLE FOR ANY
  21 SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
  22 WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER
  23 IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION,
  24 ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF
  25 THIS SOFTWARE.
  26
  27 ****************************************************************/
  28
  29 /* Please send bug reports to David M. Gay (dmg at acm dot org,
  30  * with " at " changed at "@" and " dot " changed to ".").      */
  31
  32 /* Test program for g_dfmt, strtoId, strtod, strtopd, and strtord.
  33  *
  34  * Inputs (on stdin):
  35  *              r rounding_mode
  36  *              n ndig
  37  *              number
  38  *              #hex0 hex1
  39  *
  40  *      rounding_mode values:
  41  *              0 = toward zero
  42  *              1 = nearest
  43  *              2 = toward +Infinity
  44  *              3 = toward -Infinity
  45  *
  46  * where number is a decimal floating-point number,
  47  * hex0 is a string of Hex <= 8 digits for the most significant
  48  * word of the number, hex1 is a similar string for the other
  49  * (least significant) word, and ndig is a parameters to g_dfmt.
  50  */
  51
  52 #include "gdtoaimp.h"
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55
  56  extern int getround ANSI((int,char*));
  57
  58  static char ibuf[2048], obuf[1024];
  59
  60 #define U (unsigned long)
  61
  62  int
  63 main(Void)
  64 {
  65         char *s, *se, *se1;
  66         double f1, fI[2];
  67         int i, i1, ndig = 0, r = 1;
  68         long LL[2];
  69         union { double f; ULong L[2]; } u;
  70
  71         while( (s = fgets(ibuf, sizeof(ibuf), stdin)) !=0) {
  72                 while(*s <= ' ')
  73                         if (!*s++)
  74                                 continue;
  75                 switch(*s) {
  76                   case 'r':
  77                         r = getround(r, s);
  78                         continue;
  79                   case 'n':
  80                         i = s[1];
  81                         if (i <= ' ' || i >= '0' && i <= '9') {
  82                                 ndig = atoi(s+1);
  83                                 continue;
  84                                 }
  85                         break; /* nan? */
  86                   case '#':
  87                         LL[0] = u.L[_0];
  88                         LL[1] = u.L[_1];
  89                         sscanf(s+1, "%lx %lx", &LL[0], &LL[1]);
  90                         u.L[_0] = LL[0];
  91                         u.L[_1] = LL[1];
  92                         printf("\nInput: %s", ibuf);
  93                         printf("--> f = #%lx %lx\n", (long)u.L[_0], (long)u.L[_1]);
  94                         goto fmt_test;
  95                         }
  96                 printf("\nInput: %s", ibuf);
  97                 i = strtord(ibuf, &se, r, &u.f);
  98                 if (r == 1) {
  99                         if ((u.f != strtod(ibuf, &se1) || se1 != se))
 100                                 printf("***strtod and strtord disagree!!\n");
 101                         i1 = strtopd(ibuf, &se, &f1);
 102                         if (i != i1 || u.f != f1 || se != se1)
 103                                 printf("***strtord and strtopd disagree!!\n");
 104                         }
 105                 printf("strtod consumes %d bytes and returns %d with f = %.17g = #%lx %lx\n",
 106                                 (int)(se-ibuf), i, u.f, U u.L[_0], U u.L[_1]);
 107  fmt_test:
 108                 se = g_dfmt(obuf, &u.f, ndig, sizeof(obuf));
 109                 printf("g_dfmt(%d) gives %d bytes: \"%s\"\n\n",
 110                         ndig, (int)(se-obuf), se ? obuf : "<null>");
 111                 if (*s == '#')
 112                         continue;
 113                 printf("strtoId returns %d,", strtoId(ibuf, &se, fI, &fI[1]));
 114                 printf(" consuming %d bytes.\n", (int)(se-ibuf));
 115                 if (fI[0] == fI[1]) {
 116                         if (fI[0] == u.f)
 117                                 printf("fI[0] == fI[1] == strtod\n");
 118                         else
 119                                 printf("fI[0] == fI[1] = #%lx %lx = %.17g\n",
 120                                         U ((ULong*)fI)[_0], U ((ULong*)fI)[_1],
 121                                         fI[0]);
 122                         }
 123                 else {
 124                         printf("fI[0] = #%lx %lx = %.17g\n",
 125                                 U ((ULong*)fI)[_0], U ((ULong*)fI)[_1], fI[0]);
 126                         printf("fI[1] = #%lx %lx = %.17g\n",
 127                                 U ((ULong*)&fI[1])[_0], U ((ULong*)&fI[1])[_1],
 128                                 fI[1]);
 129                         if (fI[0] == u.f)
 130                                 printf("fI[0] == strtod\n");
 131                         else if (fI[1] == u.f)
 132                                 printf("fI[1] == strtod\n");
 133                         else
 134                                 printf("**** Both differ from strtod ****\n");
 135                         }
 136                 printf("\n");
 137                 }
 138         return 0;
 139         }