lib/libc/gdtoa/test/ftest.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_ffmt, strtof, strtoIf, strtopf, and strtorf.
  33  *
  34  * Inputs (on stdin):
  35  *              r rounding_mode
  36  *              n ndig
  37  *              number
  38  *              #hex
  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  * hex is a string of <= 8 Hex digits for the internal representation
  48  * of the number, and ndig is a parameters to g_ffmt.
  49  */
  50
  51 #include "gdtoa.h"
  52 #include <stdio.h>
  53 #include <stdlib.h>
  54
  55  extern int getround ANSI((int,char*));
  56
  57  static char ibuf[2048], obuf[1024];
  58
  59 #define U (unsigned long)
  60
  61  int
  62 main(Void)
  63 {
  64         char *s, *se, *se1;
  65         int dItry, i, i1, ndig = 0, r = 1;
  66         float f1, fI[2];
  67         union { float f; ULong L[1]; } u;
  68
  69         while( (s = fgets(ibuf, sizeof(ibuf), stdin)) !=0) {
  70                 while(*s <= ' ')
  71                         if (!*s++)
  72                                 continue;
  73                 dItry = 0;
  74                 switch(*s) {
  75                   case 'r':
  76                         r = getround(r, s);
  77                         continue;
  78                   case 'n':
  79                         i = s[1];
  80                         if (i <= ' ' || (i >= '0' && i <= '9')) {
  81                                 ndig = atoi(s+1);
  82                                 continue;
  83                                 }
  84                         break; /* nan? */
  85                   case '#':
  86                         /* sscanf(s+1, "%lx", &u.L[0]); */
  87                         u.L[0] = (ULong)strtoul(s+1, &se, 16);
  88                         printf("\nInput: %s", ibuf);
  89                         printf(" --> f = #%lx\n", U u.L[0]);
  90                         goto fmt_test;
  91                         }
  92                 dItry = 1;
  93                 printf("\nInput: %s", ibuf);
  94                 i = strtorf(ibuf, &se, r, &u.f);
  95                 if (r == 1) {
  96                     if (u.f != (i1 = strtopf(ibuf, &se1, &f1), f1)
  97                                  || se != se1 || i != i1) {
  98                         printf("***strtopf and strtorf disagree!!\n");
  99                         if (u.f != f1)
 100                                 printf("\tf1 = %g\n", (double)f1);
 101                         if (i != i1)
 102                                 printf("\ti = %d but i1 = %d\n", i, i1);
 103                         if (se != se1)
 104                                 printf("se - se1 = %d\n", (int)(se-se1));
 105                         }
 106                     if (u.f != strtof(ibuf, &se1) || se != se1)
 107                         printf("***strtof and strtorf disagree!\n");
 108                     }
 109                 printf("strtof consumes %d bytes and returns %.8g = #%lx\n",
 110                                 (int)(se-ibuf), u.f, U u.L[0]);
 111  fmt_test:
 112                 se = g_ffmt(obuf, &u.f, ndig, sizeof(obuf));
 113                 printf("g_ffmt(%d) gives %d bytes: \"%s\"\n\n",
 114                         ndig, (int)(se-obuf), se ? obuf : "<null>");
 115                 if (!dItry)
 116                         continue;
 117                 printf("strtoIf returns %d,", strtoIf(ibuf, &se, fI, &fI[1]));
 118                 printf(" consuming %d bytes.\n", (int)(se-ibuf));
 119                 if (fI[0] == fI[1]) {
 120                         if (fI[0] == u.f)
 121                                 printf("fI[0] == fI[1] == strtof\n");
 122                         else
 123                                 printf("fI[0] == fI[1] = #%lx = %.8g\n",
 124                                         U *(ULong*)fI, fI[0]);
 125                         }
 126                 else {
 127                         printf("fI[0] = #%lx = %.8g\nfI[1] = #%lx = %.8g\n",
 128                                 U *(ULong*)fI, fI[0],
 129                                 U *(ULong*)&fI[1], fI[1]);
 130                         if (fI[0] == u.f)
 131                                 printf("fI[0] == strtof\n");
 132                         else if (fI[1] == u.f)
 133                                 printf("fI[1] == strtof\n");
 134                         else
 135                                 printf("**** Both differ from strtof ****\n");
 136                         }
 137                 printf("\n");
 138                 }
 139         return 0;
 140         }