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# Script to produce bits/errno.h for NaCl.
# Copyright (C) 2015 Free Software Foundation, Inc.
# This file is part of the GNU C Library.
# The GNU C Library is free software; you can redistribute it and/or
# modify it under the terms of the GNU Lesser General Public
# License as published by the Free Software Foundation; either
# version 2.1 of the License, or (at your option) any later version.
# The GNU C Library 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
# Lesser General Public License for more details.
# You should have received a copy of the GNU Lesser General Public
# License along with the GNU C Library; if not, see
# <http://www.gnu.org/licenses/>.
BEGIN { maxerrno = 0 }
$1 == "#define" && $2 ~ /NACL_ABI_E[A-Z0-9_]+/ && $3 ~ /[0-9]+/ {
ename = $2;
sub(/NACL_ABI_/, "", ename);
errno = $3 + 0;
if (errno > maxerrno) maxerrno = errno;
errnos[errno] = ename;
errnos_by_name[ename] = errno;
if ($4 == "/*" && !(ename in errno_text)) {
etext = $5;
for (i = 6; i <= NF && $i != "*/"; ++i)
etext = etext " " $i;
errno_text[ename] = etext;
}
next;
}
$1 == "@comment" && $2 == "errno.h" { errnoh=1; next }
errnoh == 1 && $1 == "@comment" {
++errnoh;
etext = $3;
for (i = 4; i <= NF; ++i)
etext = etext " " $i;
next;
}
errnoh == 2 && $1 == "@deftypevr" && $2 == "Macro" && $3 == "int" {
ename = $4;
errno_text[ename] = etext;
next;
}
function define_errno(errno, ename) {
etext = errno_text[ename];
if (length(ename) < 8) ename = ename "\t";
printf "#define\t%s\t%d\t/* %s */\n", ename, errno, etext;
}
END {
print "\
/* This file generated by errnos.awk. */\n\
\n\
#if !defined __Emath_defined && (defined _ERRNO_H || defined __need_Emath)\n\
#undef __need_Emath\n\
#define __Emath_defined 1";
emath["EDOM"] = emath["EILSEQ"] = emath["ERANGE"] = 1;
for (ename in emath) {
errno = errnos_by_name[ename];
define_errno(errno, ename);
delete errnos[errno];
}
print "\
#endif\n\
\n\
#ifdef _ERRNO_H\n";
for (i = 1; i <= maxerrno; ++i)
if (i in errnos) define_errno(i, errnos[i]);
print "\n\
#define EWOULDBLOCK EAGAIN\n\
#define ENOTSUP EOPNOTSUPP\n\
\n\
extern __thread int errno __attribute__ ((__tls_model__ (\"initial-exec\")));\n\
#define errno errno\n\
\n\
#endif";
}
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