lib/libc/gdtoa/test/xLtest.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_xLfmt, strtoIxL, strtopxL, and strtorxL.
  33  *
  34  * Inputs (on stdin):
  35  *              r rounding_mode
  36  *              n ndig
  37  *              number
  38  *              #hex0 hex1 hex2
  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 <= 8 Hex digits for the most significant
  48  * word of the number, hex1 is a similar string for the next
  49  * word, etc., and ndig is a parameters to g_xLfmt.
  50  */
  51
  52 #include "gdtoa.h"
  53 #include <stdio.h>
  54 #include <stdlib.h>
  55 #include <string.h>
  56
  57  extern int getround ANSI((int,char*));
  58
  59  static char ibuf[2048], obuf[2048];
  60
  61 #define U (unsigned long)
  62
  63 #undef _0
  64 #undef _1
  65
  66 /* one or the other of IEEE_BIG_ENDIAN or IEEE_LITTLE_ENDIAN should be #defined */
  67
  68 #ifdef IEEE_BIG_ENDIAN
  69 #define _0 0
  70 #define _1 1
  71 #define _2 2
  72 #endif
  73 #ifdef IEEE_LITTLE_ENDIAN
  74 #define _0 2
  75 #define _1 1
  76 #define _2 0
  77 #endif
  78
  79  int
  80 main(Void)
  81 {
  82         char *s, *s1, *se, *se1;
  83         int dItry, i, ndig = 0, r = 1;
  84         union { long double d; ULong bits[3]; } u, v[2];
  85
  86         while((s = fgets(ibuf, sizeof(ibuf), stdin))) {
  87                 while(*s <= ' ')
  88                         if (!*s++)
  89                                 continue;
  90                 dItry = 0;
  91                 switch(*s) {
  92                   case 'r':
  93                         r = getround(r, s);
  94                         continue;
  95                   case 'n':
  96                         i = s[1];
  97                         if (i <= ' ' || (i >= '0' && i <= '9')) {
  98                                 ndig = atoi(s+1);
  99                                 continue;
 100                                 }
 101                         break; /* nan? */
 102                   case '#':
 103                         /* sscanf(s+1, "%lx %lx %lx", &u.bits[_0],      */
 104                         /*      &u.bits[_1], &u.bits[_2]);              */
 105                         u.bits[_0] = (ULong)strtoul(s1 = s+1, &se, 16);
 106                         if (se > s1) {
 107                             u.bits[_1] = (ULong)strtoul(s1=se, &se, 16);
 108                             if (se > s1)
 109                                 u.bits[_2] = (ULong)strtoul(s1=se, &se, 16);
 110                             }
 111                         printf("\nInput: %s", ibuf);
 112                         printf(" --> f = #%lx %lx %lx\n", U u.bits[_0],
 113                                 U u.bits[_1], U u.bits[_2]);
 114                         goto fmt_test;
 115                         }
 116                 dItry = 1;
 117                 printf("\nInput: %s", ibuf);
 118                 i = strtorxL(ibuf, &se, r, u.bits);
 119                 if (r == 1 && (i != strtopxL(ibuf, &se1, v[0].bits) || se1 != se
 120                  || memcmp(u.bits, v[0].bits, 12)))
 121                         printf("***strtoxL and strtorxL disagree!!\n:");
 122                 printf("\nstrtoxL consumes %d bytes and returns %d\n",
 123                                 (int)(se-ibuf), i);
 124                 printf("with bits = #%lx %lx %lx\n",
 125                         U u.bits[_0], U u.bits[_1], U u.bits[_2]);
 126                 if (sizeof(long double) == 12)
 127                         printf("printf(\"%%.21Lg\") gives %.21Lg\n", u.d);
 128  fmt_test:
 129                 se = g_xLfmt(obuf, u.bits, ndig, sizeof(obuf));
 130                 printf("g_xLfmt(%d) gives %d bytes: \"%s\"\n\n",
 131                         ndig, (int)(se-obuf), se ? obuf : "<null>");
 132                 if (!dItry)
 133                         continue;
 134                 printf("strtoIxL returns %d,",
 135                         strtoIxL(ibuf, &se, v[0].bits, v[1].bits));
 136                 printf(" consuming %d bytes.\n", (int)(se-ibuf));
 137                 if (!memcmp(v[0].bits, v[1].bits, 12)) {
 138                         if (!memcmp(u.bits, v[0].bits, 12))
 139                                 printf("fI[0] == fI[1] == strtoxL\n");
 140                         else {
 141                                 printf("fI[0] == fI[1] = #%lx %lx %lx\n",
 142                                         U v[0].bits[_0], U v[0].bits[_1],
 143                                         U v[0].bits[_2]);
 144                                 if (sizeof(long double) == 12)
 145                                     printf("= %.21Lg\n", v[0].d);
 146                                 }
 147                         }
 148                 else {
 149                         printf("fI[0] = #%lx %lx %lx\n",
 150                                         U v[0].bits[_0], U v[0].bits[_1],
 151                                         U v[0].bits[_2]);
 152                         if (sizeof(long double) == 12)
 153                                 printf("= %.21Lg\n", v[0].d);
 154                         printf("fI[1] = #%lx %lx %lx\n",
 155                                         U v[1].bits[_0], U v[1].bits[_1],
 156                                         U v[1].bits[_2]);
 157                         if (sizeof(long double) == 12)
 158                                 printf("= %.21Lg\n", v[1].d);
 159                         if (!memcmp(v[0].bits, u.bits, 12))
 160                                 printf("fI[0] == strtoxL\n");
 161                         else if (!memcmp(v[1].bits, u.bits, 12))
 162                                 printf("fI[1] == strtoxL\n");
 163                         else
 164                                 printf("**** Both differ from strtod ****\n");
 165                         }
 166                 printf("\n");
 167                 }
 168         return 0;
 169         }