sysdeps/unix/errnos-tmpl.c

   1 /* Copyright (C) 1991, 1993, 1997 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 not,
  16    write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
  17    Boston, MA 02111-1307, USA.  */
  18
  19 #include <errno.h>
  20
  21 static char iferrno[] = "#ifdef _ERRNO_H";
  22 static char endiferrno[] = "#endif /* <errno.h> included.  */";
  23 static char ifEmath[] = "#if !defined(__Emath_defined) && \
  24  (defined(_ERRNO_H) || defined(__need_Emath))";
  25 static char endifEmath[] = "#endif /* Emath not defined and <errno.h> \
  26 included or need Emath.  */";
  27
  28 static int biggest_value = 0;
  29 static int done_ENOSYS = 0;
  30 static int done_ERANGE = 0, done_EDOM = 0;
  31
  32 static void
  33 DO(name, value)
  34      char *name;
  35      int value;
  36 {
  37   int is_ERANGE = !done_ERANGE && !strcmp(name, "ERANGE");
  38   int is_EDOM = !done_EDOM && !strcmp(name, "EDOM");
  39   int is_Emath = is_ERANGE || is_EDOM;
  40
  41   if (is_Emath)
  42     {
  43       puts(endiferrno);
  44       puts(ifEmath);
  45     }
  46
  47   if (!strcmp (name, "EWOULDBLOCK"))
  48     {
  49       puts ("#define EWOULDBLOCK EAGAIN /* Translated in glibc. */");
  50       name = "EWOULDBLOCK_sys /* Value actually returned by kernel. */";
  51     }
  52
  53   printf ("#define %s %d\n", name, value);
  54
  55   if (is_Emath)
  56     {
  57       puts(endifEmath);
  58       puts(iferrno);
  59     }
  60
  61   if (value > biggest_value)
  62     biggest_value = value;
  63
  64   if (is_ERANGE)
  65     done_ERANGE = 1;
  66   else if (is_EDOM)
  67     done_EDOM = 1;
  68   else if (!done_ENOSYS && !strcmp(name, "ENOSYS"))
  69     done_ENOSYS = 1;
  70 }
  71
  72 int
  73 main()
  74 {
  75   puts(iferrno);
  76
  77   ERRNOS;
  78
  79   if (!done_EDOM || !done_ERANGE)
  80     {
  81       puts(endiferrno);
  82       puts(ifEmath);
  83       if (!done_EDOM)
  84         printf("#define EDOM %d\n", ++biggest_value);
  85       if (!done_ERANGE)
  86         printf("#define ERANGE %d\n", ++biggest_value);
  87       puts(endifEmath);
  88     }
  89
  90   if (!done_ENOSYS)
  91     printf("#define ENOSYS %d\n", ++biggest_value);
  92
  93   puts(endiferrno);
  94
  95   puts("#undef __need_Emath");
  96   puts("#ifndef __Emath_defined\n#define __Emath_defined 1\n#endif");
  97
  98   exit(0);
  99 }