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# Copyright (C) 1991-2017 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/>.
# errno.texi contains lines like:
# @comment errno.h
# @comment POSIX.1: Function not implemented
# @deftypevr Macro int ENOSYS
# @comment errno 78
# Descriptive paragraph...
# @end deftypevr
BEGIN {
# Here we list the E* names that might be duplicate names for the
# same integer value on some systems. This causes the code below
# to generate ``#if defined (ALIAS) && ALIAS != ORIGINAL'' in the code,
# so the output does not presume that these are in fact aliases.
# We list here all the known potential cases on any system,
# so that the C source we produce will do the right thing based
# on the actual #define'd values it's compiled with.
alias["EWOULDBLOCK"]= "EAGAIN";
alias["EDEADLOCK"] = "EDEADLK";
alias["ENOTSUP"] = "EOPNOTSUPP";
print "/* This file is generated from errno.texi by errlist.awk. */"
print "";
print "#include <errno.h>";
print "#include <libintl.h>";
print "";
print "#ifndef ERR_REMAP";
print "# define ERR_REMAP(n) n";
print "#endif";
print "";
print "#if !defined EMIT_ERR_MAX && !defined ERRLIST_NO_COMPAT";
print "# include <errlist-compat.h>";
print "#endif";
print "#ifdef ERR_MAX";
print "# define ERRLIST_SIZE ERR_MAX + 1";
print "#else"
print "# define ERR_MAX 0";
print "# define ERRLIST_SIZE";
print "#endif";
print "const char *const _sys_errlist_internal[ERRLIST_SIZE] =";
print " {";
print " [0] = N_(\"Success\"),"
}
$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" \
{
e = $4; errnoh++; next;
}
errnoh == 3 && $1 == "@comment" && $2 == "errno" \
{
errno = $3 + 0;
if (alias[e])
printf "#if defined (%s) && %s != %s\n", e, e, alias[e];
else
printf "#ifdef %s\n", e;
errnoh = 4;
desc="";
next;
}
errnoh == 4 && $1 == "@end" && $2 == "deftypevr" \
{
printf "/*%s */\n", desc;
printf " [ERR_REMAP (%s)] = N_(\"%s\"),\n", e, etext;
printf "# if %s > ERR_MAX\n", e;
print "# undef ERR_MAX";
printf "# define ERR_MAX %s\n", e;
print "# endif";
print "#endif";
errnoh = 0;
next;
}
errnoh == 4 \
{
# This magic tag in C comments gets them copied into libc.pot.
desc = desc "\nTRANS" ($0 != "" ? " " : "") $0; next
}
{ errnoh=0 }
END {
print " };";
print "";
print "#define NERR \\";
print " (sizeof _sys_errlist_internal / sizeof _sys_errlist_internal [0])";
print "const int _sys_nerr_internal = NERR;"
print "";
print "#if IS_IN (libc) && !defined ERRLIST_NO_COMPAT";
print "# include <errlist-compat.c>";
print "#endif";
print "";
print "#ifdef EMIT_ERR_MAX";
print "void dummy (void)"
print "{ asm volatile (\" @@@ %0 @@@ \" : : \"i\" (ERR_REMAP (ERR_MAX))); }"
print "#endif";
}
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