# Copyright (C) 1991-2018 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:

# @deftypevr Macro int ENOSYS

# @errno{ENOSYS, 78, Function not implemented}

# 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\"),"

  }

/^@errno\{/ \

  {

    etext = $3;

    for (i = 4; i <= NF; ++i)

      etext = etext " " $i;

    etext = substr(etext, 1, length(etext)-1)

    e = substr($1, 8, length($1)-8)

    errno = substr($2, 1, length($2)-1) + 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

  }

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";

}