sysdeps/unix/errnos-tmpl.c

   1 /* Copyright (C) 1991, 1993 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 modify
   5 it under the terms of the GNU General Public License as published by
   6 the Free Software Foundation; either version 2, or (at your option)
   7 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
  12 GNU General Public License for more details.
  13
  14 You should have received a copy of the GNU General Public License
  15 along with the GNU C Library; see the file COPYING.  If not, write to
  16 the Free Software Foundation, 675 Mass Ave, Cambridge, MA 02139, USA.  */
  17
  18 #include <errno.h>
  19
  20 static char iferrno[] = "#ifdef _ERRNO_H";
  21 static char endiferrno[] = "#endif /* <errno.h> included.  */";
  22 static char ifEmath[] = "#if !defined(__Emath_defined) && \
  23  (defined(_ERRNO_H) || defined(__need_Emath))";
  24 static char endifEmath[] = "#endif /* Emath not defined and <errno.h> \
  25 included or need Emath.  */";
  26
  27 static int biggest_value = 0;
  28 static int done_ENOSYS = 0;
  29 static int done_ERANGE = 0, done_EDOM = 0;
  30
  31 static void
  32 DO(name, value)
  33      char *name;
  34      int value;
  35 {
  36   int is_ERANGE = !done_ERANGE && !strcmp(name, "ERANGE");
  37   int is_EDOM = !done_EDOM && !strcmp(name, "EDOM");
  38   int is_Emath = is_ERANGE || is_EDOM;
  39
  40   if (is_Emath)
  41     {
  42       puts(endiferrno);
  43       puts(ifEmath);
  44     }
  45
  46   if (!strcmp (name, "EWOULDBLOCK"))
  47     {
  48       puts ("#define EWOULDBLOCK EAGAIN /* Translated in glibc. */");
  49       name = "EWOULDBLOCK_sys /* Value actually returned by kernel. */";
  50     }
  51
  52   printf ("#define %s %d\n", name, value);
  53
  54   if (is_Emath)
  55     {
  56       puts(endifEmath);
  57       puts(iferrno);
  58     }
  59
  60   if (value > biggest_value)
  61     biggest_value = value;
  62
  63   if (is_ERANGE)
  64     done_ERANGE = 1;
  65   else if (is_EDOM)
  66     done_EDOM = 1;
  67   else if (!done_ENOSYS && !strcmp(name, "ENOSYS"))
  68     done_ENOSYS = 1;
  69 }
  70
  71 int
  72 main()
  73 {
  74   puts(iferrno);
  75
  76   ERRNOS;
  77
  78   if (!done_EDOM || !done_ERANGE)
  79     {
  80       puts(endiferrno);
  81       puts(ifEmath);
  82       if (!done_EDOM)
  83         printf("#define EDOM %d\n", ++biggest_value);
  84       if (!done_ERANGE)
  85         printf("#define ERANGE %d\n", ++biggest_value);
  86       puts(endifEmath);
  87     }
  88
  89   if (!done_ENOSYS)
  90     printf("#define ENOSYS %d\n", ++biggest_value);
  91
  92   puts(endiferrno);
  93
  94   puts("#undef __need_Emath");
  95   puts("#ifndef __Emath_defined\n#define __Emath_defined 1\n#endif");
  96
  97   exit(0);
  98 }