# mkerrnos.awk

# Copyright (C) 2003, 2004 g10 Code GmbH

# 

# This program is free software; you can redistribute it and/or

# modify it under the terms of the GNU General Public License as

# published by the Free Software Foundation; either version 2 of

# the License, or (at your option) any later version.

#

# This program is distributed in the hope that it will be useful,

# but WITHOUT ANY WARRANTY; without even the implied warranty of

# MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU

# General Public License for more details.

#

# You should have received a copy of the GNU General Public License

# along with this program; if not, write to the Free Software

# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.

#

# As a special exception, g10 Code GmbH gives unlimited permission to

# copy, distribute and modify the C source files that are the output

# of mkerrnos.awk.  You need not follow the terms of the GNU General

# Public License when using or distributing such scripts, even though

# portions of the text of mkerrnos.awk appear in them.  The GNU

# General Public License (GPL) does govern all other use of the material

# that constitutes the mkerrnos.awk program.

#

# Certain portions of the mkerrnos.awk source text are designed to be

# copied (in certain cases, depending on the input) into the output of

# mkerrnos.awk.  We call these the "data" portions.  The rest of the

# mkerrnos.awk source text consists of comments plus executable code

# that decides which of the data portions to output in any given case.

# We call these comments and executable code the "non-data" portions.

# mkerrnos.h never copies any of the non-data portions into its output.

#

# This special exception to the GPL applies to versions of mkerrnos.awk

# released by g10 Code GmbH.  When you make and distribute a modified version

# of mkerrnos.awk, you may extend this special exception to the GPL to

# apply to your modified version as well, *unless* your modified version

# has the potential to copy into its output some of the text that was the

# non-data portion of the version that you started with.  (In other words,

# unless your change moves or copies text from the non-data portions to the

# data portions.)  If your modification has such potential, you must delete

# any notice of this special exception to the GPL from your modified version.

# This script outputs a source file that does define the following

# symbols:

#

# static const int err_code_to_errno[];

# A mapping of gpg_err_code_t numbers to system errno.  The index of an

# error code in the table can be obtained after removing the system error

# code indication bit.

#

# The input file is a list of possible system errors in the column errnoidx

# (defaults to 2).

#

# Comments (starting with # and ending at the end of the line) are removed,

# as is trailing whitespace.

BEGIN {

  FS="[\t]+";

  header = 1;

  if (errnoidx == 0)

    errnoidx = 2;

  print "/* Output of mkerrnos.awk.  DO NOT EDIT.  */";

  print "";

}

/^#/ { next; }

header {

  if ($1 ~ /^[0-9]/)

    {

      print "#include <errno.h>";

      print "#ifdef _WIN32";

      print "#include <winsock2.h>";

      print "#endif";

      print "";

      print "static const int err_code_to_errno [] = {";

      header = 0;

    }

  else

    print;

}

!header {

  sub (/\#.+/, "");

  sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.

  if (/^$/)

    next;

    print "#ifdef " $errnoidx;

    print "  " $errnoidx ",";

    print "#else";

    print "#ifdef WSA" $errnoidx;

    print "  WSA" $errnoidx ",";

    print "#else"; 

    print "  0,";

    print "#endif";

    print "#endif";

}

END {

  print "};";

}