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#!/usr/bin/perl -w
#
# Update spec files across dlls that share an implementation
#
# Copyright 2011 Alexandre Julliard
#
# This 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.
#
# This 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 this library; if not, write to the Free Software
# Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
#

use strict;

my %funcs;
my $group_head;

my @dll_groups =
(
 [
  "msvcrt",
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  "msvcirt",
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  "msvcrt40",
  "msvcrt20",
 ],
 [
  "msvcrt",
  "msvcp90",
  "msvcp100",
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  "msvcp110",
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  "msvcp120",
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  "msvcp140",
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  "msvcp71",
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  "msvcp80",
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  "msvcp70",
  "msvcp60",
 ],
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 [
  "msvcr120",
  "msvcr120_app",
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  "concrt140",
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 ],
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 [
  "ucrtbase",
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  "vcruntime140",
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 ],
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 [
  "msvcp120",
  "msvcp120_app",
 ],
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 [
  "msvcp140",
  "msvcp_win",
 ],
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 [
  "d3d10",
  "d3d10_1",
 ],
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 [
  "d3dx10_43",
  "d3dx10_42",
  "d3dx10_41",
  "d3dx10_40",
  "d3dx10_39",
  "d3dx10_38",
  "d3dx10_37",
  "d3dx10_36",
  "d3dx10_35",
  "d3dx10_34",
  "d3dx10_33",
 ],
 [
  "xinput1_3",
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  "xinput1_4",
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  "xinput1_2",
  "xinput1_1",
  "xinput9_1_0",
 ],
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 [
  "vcomp",
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  "vcomp140",
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  "vcomp120",
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  "vcomp110",
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  "vcomp100",
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  "vcomp90",
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 ],
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 [
  "advapi32",
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  "sechost",
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 ],
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 [
  "netapi32",
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  "srvcli",
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 ],
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 [
  "ole32",
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  "iprop",
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 ],
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 [
  "secur32",
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  "security",
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  "sspicli",
 ],
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 [
  "gdi32",
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  "usp10"
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 ],
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 [
  "bthprops.cpl",
  "irprops.cpl",
 ],
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 [
  "sfc_os",
  "sfc",
 ],
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 [
  "bcrypt",
  "ncrypt",
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  "cng.sys",
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 ],
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 [
  "ntoskrnl.exe",
  "hal",
 ],
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 [
  "mscoree",
  "mscorwks",
 ],
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 [
  "sppc",
  "slc",
 ],
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);

my $update_flags = 0;
my $show_duplicates = 0;

foreach my $arg (@ARGV)
{
    if ($arg eq "-f") { $update_flags = 1; }
    elsif ($arg eq "-d") { $show_duplicates = 1; }
}

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# update a file if changed
sub update_file($$)
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{
    my $file = shift;
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    my $new = shift;

    open FILE, ">$file.new" or die "cannot create $file.new";
    print FILE $new;
    close FILE;
    rename "$file.new", "$file";
    print "$file updated\n";
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}

# parse a spec file line
sub parse_line($$$)
{
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    my ($name, $line, $str) = @_;
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    if ($str =~ /^\s*(\@|\d+)\s+(stdcall|cdecl|varargs|thiscall|stub|extern)\s+((?:-\S+\s+)*)([A-Za-z0-9_\@\$?]+)(?:\s*(\([^)]*\)))?(?:\s+([A-Za-z0-9_\@\$?.]+))?(\s*\#.*)?/)
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    {
        return ( "ordinal" => $1, "callconv" => $2, "flags" => $3, "name" => $4, "args" => $5 || "",
                 "target" => $6 || $4, "comment" => $7, "spec" => $name );
    }
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    return () if $str =~ /^\s*$/;
    return () if $str =~ /^\s*\#/;
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    printf STDERR "$name.spec:$line: error: Unrecognized line $_\n";
}

sub read_spec_file($)
{
    my $name = shift;
    my $file = "dlls/$name/$name.spec";
    my %stubs;
    open SPEC, "<$file" or die "cannot open $file";
    while (<SPEC>)
    {
        chomp;
        my %descr = parse_line( $name, $., $_ );
        next unless %descr;

        my $func = $descr{name};
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        if (defined $funcs{$func})
        {
            my %update = %{$funcs{$func}};
            next if $update{ordinal} ne $descr{ordinal} or $update{callconv} ne $descr{callconv} or $update{args} ne $descr{args};

            my $arch = $1 if $update{flags} =~ /-arch=(\S+)/;
            my $new_arch = $1 if $descr{flags} =~ /-arch=(\S+)/;
            next if !defined $arch or !defined $new_arch;

            if (($arch eq "win32" and $new_arch eq "win64") or ($arch eq "win64" and $new_arch eq "win32"))
            {
                $funcs{$func}{flags} =~ s/-arch=\S+\s+//;
                next;
            }

            $funcs{$func}{flags} =~ s/-arch=$arch/-arch=$arch,$new_arch/;
            next;
        }
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        next if $func eq "@";
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        $funcs{$func} = \%descr;
    }
    close SPEC;
}

sub update_spec_file($)
{
    my $name = shift;
    my $file = "dlls/$name/$name.spec";
    my %stubs;
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    my ($old, $new);
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    open SPEC, "<$file" or die "cannot open $file";
    while (<SPEC>)
    {
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        $old .= $_;
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        chomp;

        my $commented_out = 0;
        my %descr = parse_line( $name, $., $_ );
        if (!%descr)
        {
            # check for commented out exports
            if (/^\s*\#\s*((?:\@|\d+)\s+)?((?:extern|stub|stdcall|cdecl|varargs|thiscall)\s+.*)/)
            {
                $commented_out = 1;
                %descr = parse_line( $name, $., ($1 || "\@ ") . $2 );
            }
        }
        goto done unless %descr;

        my $func = $descr{name};
        if (!defined $funcs{$func})
        {
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            $funcs{$func} = \%descr unless $commented_out || $name =~ /-/;
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            goto done;
        }

        my %parent = %{$funcs{$func}};
        goto done if $parent{spec} eq $descr{spec};  # the definition is in this spec file
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        goto done if $descr{comment} && $descr{comment} =~ /don't forward/;
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        if ($descr{callconv} ne "stub" && $descr{target} !~ /\./ && !$commented_out)
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        {
            printf "%s:%u: note: %s already defined in %s\n", $file, $., $func, $parent{spec} if $show_duplicates;
            goto done;
        }

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        my $flags = $descr{flags};
        if ($parent{callconv} ne "stub" || $update_flags)
        {
            $flags = $parent{flags};
            $flags =~ s/-ordinal\s*// if $descr{ordinal} eq "@";
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            $flags =~ s/-noname\s*// if $descr{ordinal} eq "@";
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            $flags =~ s/-import\s*//;
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            if ($descr{flags} =~ /-private/)  # preserve -private flag
            {
                $flags = "-private " . $flags unless $flags =~ /-private/;
            }
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        }
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        if ($parent{callconv} ne "stub" || $parent{args})
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        {
            my $callconv = $parent{callconv} ne "stub" ? $parent{callconv} :
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                           $parent{spec} =~ /(msvc|ucrtbase)/ ? "cdecl" : "stdcall";  # hack
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            $_ = sprintf "$descr{ordinal} %s %s%s", $callconv, $flags, $func;
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            if ($parent{target} =~ /$group_head\./)  # use the same forward as parent if possible
            {
                $_ .= sprintf "%s %s", $parent{args}, $parent{target};
            }
            else
            {
                $_ .= sprintf "%s %s.%s", $parent{args}, $parent{spec}, $func;
            }
        }
        else
        {
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            $_ = sprintf "$descr{ordinal} stub %s%s", $flags, $func;
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        }
        $_ .= $descr{comment} || "";

      done:
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        $new .= "$_\n";
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    }
    close SPEC;
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    update_file( $file, $new ) if $old ne $new;
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}

sub sync_spec_files(@)
{
    %funcs = ();
    $group_head = shift;
    read_spec_file( $group_head );
    foreach my $spec (@_) { update_spec_file($spec); }
}

foreach my $group (@dll_groups)
{
    sync_spec_files( @{$group} );
}