lib/libc/gdtoa/test/strtodt.c

   1 /****************************************************************
   2
   3 The author of this software is David M. Gay.
   4
   5 Copyright (C) 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 strtod.  */
  33
  34 /* On stdin, read triples: d x y:
  35  *      d = decimal string
  36  *      x = high-order Hex value expected from strtod
  37  *      y = low-order Hex value
  38  * Complain about errors.
  39  */
  40
  41 #include "gdtoa.h"      /* for ULong */
  42 #include <stdio.h>
  43 #include <stdlib.h>
  44 #include <string.h>
  45
  46  static int W0, W1;
  47  typedef union {
  48                 double d;
  49                 ULong L[2];
  50                 } U;
  51
  52 #define UL (unsigned long)
  53
  54  static int
  55 process(char *fname, FILE *f)
  56 {
  57         U a, b;
  58         char buf[2048];
  59         char *s, *s1, *se;
  60         int line, n;
  61
  62         line = n = 0;
  63
  64  top:
  65         while(fgets(s = buf, sizeof(buf), f)) {
  66                 line++;
  67                 while(*s <= ' ')
  68                         if (!*s++)
  69                                 goto top; /* break 2 */
  70                 if (*s == '#')
  71                         continue;
  72                 while(*s > ' ')
  73                         s++;
  74                 /* if (sscanf(s,"\t%lx\t%lx", &a.L[0], &a.L[1]) != 2) */
  75                 if ((a.L[0] = (ULong)strtoul(s, &s1,16), s1 <= s)
  76                  || (a.L[1] = (ULong)strtoul(s1,&se,16), se <= s1)) {
  77                         printf("Badly formatted line %d of %s\n",
  78                                 line, fname);
  79                         n++;
  80                         continue;
  81                         }
  82                 b.d = strtod(buf,0);
  83                 if (b.L[W0] != a.L[0] || b.L[W1] != a.L[1]) {
  84                         n++;
  85                         printf("Line %d of %s: got %lx %lx; expected %lx %lx\n",
  86                                 line, fname, UL b.L[W0], UL b.L[W1], UL a.L[0], UL a.L[1]);
  87                         }
  88                 }
  89         return n;
  90         }
  91
  92  int
  93 main(int argc, char **argv)
  94 {
  95         FILE *f;
  96         char *prog, *s;
  97         int n, rc;
  98         U u;
  99
 100         prog = argv[0];
 101         if (argc == 2 && !strcmp(argv[1],"-?")) {
 102                 fprintf(stderr, "Usage: %s [file [file...]]\n"
 103                         "\tto read data file(s) of tab-separated triples d x y with\n"
 104                         "\t\td decimal string\n"
 105                         "\t\tx = high-order Hex value expected from strtod\n"
 106                         "\t\ty = low-order Hex value\n"
 107                         "\tComplain about errors by strtod.\n"
 108                         "\tIf no files, read triples from stdin.\n",
 109                         prog);
 110                 return 0;
 111                 }
 112
 113         /* determine endian-ness */
 114
 115         u.d = 1.;
 116         W0 = u.L[0] == 0;
 117         W1 = 1 - W0;
 118
 119         /* test */
 120
 121         n = rc = 0;
 122         if (argc <= 1)
 123                 n = process("<stdin>", stdin);
 124         else
 125                 while((s = *++argv))
 126                         if ((f = fopen(s,"r"))) {
 127                                 n += process(s, f);
 128                                 fclose(f);
 129                                 }
 130                         else {
 131                                 rc = 2;
 132                                 fprintf(stderr, "Cannot open %s\n", s);
 133                                 }
 134         printf("%d bad conversions\n", n);
 135         if (n)
 136                 rc |= 1;
 137         return rc;
 138         }