stdlib/tst-strtod.c

   1 /* Copyright (C) 1991 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 Library General Public License as
   6 published by the Free Software Foundation; either version 2 of the
   7 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 Library General Public License for more details.
  13
  14 You should have received a copy of the GNU Library General Public
  15 License along with the GNU C Library; see the file COPYING.LIB.  If
  16 not, write to the Free Software Foundation, Inc., 675 Mass Ave,
  17 Cambridge, MA 02139, USA.  */
  18
  19 #include <ansidecl.h>
  20 #include <ctype.h>
  21 #include <stdio.h>
  22 #include <stdlib.h>
  23 #include <errno.h>
  24 #include <string.h>
  25
  26 struct ltest
  27   {
  28     CONST char *str;            /* Convert this.  */
  29     double expect;              /* To get this.  */
  30     char left;                  /* With this left over.  */
  31     int err;                    /* And this in errno.  */
  32   };
  33 static CONST struct ltest tests[] =
  34   {
  35     { "12.345", 12.345, '\0', 0 },
  36     { "12.345e19", 12.345e19, '\0', 0 },
  37     { "-.1e+9", -.1e+9, '\0', 0 },
  38     { ".125", .125, '\0', 0 },
  39     { "1e20", 1e20, '\0', 0 },
  40     { NULL, 0, '\0', 0 }
  41   };
  42
  43 static void EXFUN(expand, (char *dst, int c));
  44
  45 int
  46 DEFUN_VOID(main)
  47 {
  48   register CONST struct ltest *lt;
  49   char *ep;
  50   int status = 0;
  51
  52   for (lt = tests; lt->str != NULL; ++lt)
  53     {
  54       double d;
  55
  56       errno = 0;
  57       d = strtod(lt->str, &ep);
  58       printf("strtod(\"%s\") test %u",
  59              lt->str, (unsigned int) (lt - tests));
  60       if (d == lt->expect && *ep == lt->left && errno == lt->err)
  61         puts("\tOK");
  62       else
  63         {
  64           puts("\tBAD");
  65           if (d != lt->expect)
  66             printf("  returns %.60g, expected %.60g\n", d, lt->expect);
  67           if (lt->left != *ep)
  68             {
  69               char exp1[5], exp2[5];
  70               expand(exp1, *ep);
  71               expand(exp2, lt->left);
  72               printf("  leaves '%s', expected '%s'\n", exp1, exp2);
  73             }
  74           if (errno != lt->err)
  75             printf("  errno %d (%s)  instead of %d (%s)\n",
  76                    errno, strerror(errno), lt->err, strerror(lt->err));
  77           status = 1;
  78         }
  79     }
  80
  81   exit(status ? EXIT_FAILURE : EXIT_SUCCESS);
  82 }
  83
  84 static void
  85 DEFUN(expand, (dst, c), register char *dst AND register int c)
  86 {
  87   if (isprint(c))
  88     {
  89       dst[0] = c;
  90       dst[1] = '\0';
  91     }
  92   else
  93     (void) sprintf(dst, "%#.3o", (unsigned int) c);
  94 }