1# mkerrnos.awk
2# Copyright (C) 2003, 2004 g10 Code GmbH
3# 
4# This program is free software; you can redistribute it and/or
5# modify it under the terms of the GNU General Public License as
6# published by the Free Software Foundation; either version 2 of
7# the License, or (at your option) any later version.
8#
9# This program 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# General Public License for more details.
13#
14# You should have received a copy of the GNU General Public License
15# along with this program; if not, write to the Free Software
16# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
17#
18# As a special exception, g10 Code GmbH gives unlimited permission to
19# copy, distribute and modify the C source files that are the output
20# of mkerrnos.awk.  You need not follow the terms of the GNU General
21# Public License when using or distributing such scripts, even though
22# portions of the text of mkerrnos.awk appear in them.  The GNU
23# General Public License (GPL) does govern all other use of the material
24# that constitutes the mkerrnos.awk program.
25#
26# Certain portions of the mkerrnos.awk source text are designed to be
27# copied (in certain cases, depending on the input) into the output of
28# mkerrnos.awk.  We call these the "data" portions.  The rest of the
29# mkerrnos.awk source text consists of comments plus executable code
30# that decides which of the data portions to output in any given case.
31# We call these comments and executable code the "non-data" portions.
32# mkerrnos.h never copies any of the non-data portions into its output.
33#
34# This special exception to the GPL applies to versions of mkerrnos.awk
35# released by g10 Code GmbH.  When you make and distribute a modified version
36# of mkerrnos.awk, you may extend this special exception to the GPL to
37# apply to your modified version as well, *unless* your modified version
38# has the potential to copy into its output some of the text that was the
39# non-data portion of the version that you started with.  (In other words,
40# unless your change moves or copies text from the non-data portions to the
41# data portions.)  If your modification has such potential, you must delete
42# any notice of this special exception to the GPL from your modified version.
43
44# This script outputs a source file that does define the following
45# symbols:
46#
47# static const int err_code_to_errno[];
48# A mapping of gpg_err_code_t numbers to system errno.  The index of an
49# error code in the table can be obtained after removing the system error
50# code indication bit.
51#
52# The input file is a list of possible system errors in the column errnoidx
53# (defaults to 2).
54#
55# Comments (starting with # and ending at the end of the line) are removed,
56# as is trailing whitespace.
57
58BEGIN {
59  FS="[\t]+";
60  header = 1;
61  if (errnoidx == 0)
62    errnoidx = 2;
63
64  print "/* Output of mkerrnos.awk.  DO NOT EDIT.  */";
65  print "";
66}
67
68/^#/ { next; }
69
70header {
71  if ($1 ~ /^[0-9]/)
72    {
73      print "#include <errno.h>";
74      print "#ifdef _WIN32";
75      print "#include <winsock2.h>";
76      print "#endif";
77      print "";
78      print "static const int err_code_to_errno [] = {";
79      header = 0;
80    }
81  else
82    print;
83}
84
85!header {
86  sub (/\#.+/, "");
87  sub (/[ 	]+$/, ""); # Strip trailing space and tab characters.
88
89  if (/^$/)
90    next;
91
92    print "#ifdef " $errnoidx;
93    print "  " $errnoidx ",";
94    print "#else";
95    print "#ifdef WSA" $errnoidx;
96    print "  WSA" $errnoidx ",";
97    print "#else"; 
98    print "  0,";
99    print "#endif";
100    print "#endif";
101}
102END {
103  print "};";
104}
105