#! /usr/bin/perl -w
#
# Build the server/trace.c and server/request.h files
# from the contents of include/wine/server.h.
#
# Copyright (C) 1998 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., 59 Temple Place, Suite 330, Boston, MA  02111-1307  USA
#
use strict;

my %formats =
(
    "int"           => "%d",
    "short int"     => "%d",
    "char"          => "%c",
    "unsigned char" => "%02x",
    "unsigned short"=> "%04x",
    "unsigned int"  => "%08x",
    "void*"         => "%p",
    "time_t"        => "%ld",
    "size_t"        => "%d",
    "obj_handle_t"  => "%p",
    "atom_t"        => "%04x",
    "user_handle_t" => "%p",
    "process_id_t"  => "%04x",
    "thread_id_t"   => "%04x",
    "abs_time_t"    => "&dump_abs_time",
    "rectangle_t"   => "&dump_rectangle",
    "char_info_t"   => "&dump_char_info",
);

my @requests = ();
my %replies = ();

my @trace_lines = ();


### Generate a dumping function

sub DO_DUMP_FUNC($$@)
{
    my $name = shift;
    my $req = shift;
    push @trace_lines, "static void dump_${name}_$req( const struct ${name}_$req *req )\n{\n";
    while ($#_ >= 0)
    {
	my $type = shift;
	my $var = shift;
	if (defined($formats{$type}))
	{
            if ($formats{$type} =~ /^&(.*)/)
            {
                my $func = $1;
                push @trace_lines, "    fprintf( stderr, \" $var=\" );\n";
                push @trace_lines, "    $func( &req->$var );\n";
                push @trace_lines, "    fprintf( stderr, \",\" );\n" if ($#_ > 0);
            }
            else
            {
                push @trace_lines, "    fprintf( stderr, \" $var=$formats{$type}";
                push @trace_lines, "," if ($#_ > 0);
                push @trace_lines, "\", ";
                # In the case of time_t we need to cast the parameter to
                # long to match the associated "%ld" printf modifier.
                push @trace_lines, "(long)" if( $type eq "time_t" );
                push @trace_lines, "req->$var );\n";
            }
	}
	else  # must be some varargs format
	{
            my $func = $type;
            push @trace_lines, "    fprintf( stderr, \" $var=\" );\n";
            push @trace_lines, "    $func;\n";
            push @trace_lines, "    fputc( ',', stderr );\n" if ($#_ > 0);
        }
    }
    push @trace_lines, "}\n\n";
}

### Parse the request definitions

sub PARSE_REQUESTS()
{
    # states: 0 = header 1 = declarations 2 = inside @REQ 3 = inside @REPLY
    my $state = 0;
    my $name = "";
    my @in_struct = ();
    my @out_struct = ();

    open(PROTOCOL,"server/protocol.def") or die "Can't open server/protocol.def";

    while (<PROTOCOL>)
    {
        my ($type, $var);
        # strip comments
	s!/\*.*\*/!!g;
        # strip white space at end of line
        s/\s+$//;

        if (/^\@HEADER/)
        {
            die "Misplaced \@HEADER" unless $state == 0;
            $state++;
            next;
        }

        # ignore everything while in state 0
        next if $state == 0;

        if (/^\@REQ\(\s*(\w+)\s*\)/)
        {
            $name = $1;
            die "Misplaced \@REQ" unless $state == 1;
            # start a new request
            @in_struct = ();
            @out_struct = ();
            print SERVER_PROT "struct ${name}_request\n{\n";
            print SERVER_PROT "    struct request_header __header;\n";
            $state++;
            next;
        }

        if (/^\@REPLY/)
        {
            die "Misplaced \@REPLY" unless $state == 2;
            print SERVER_PROT "};\n";
            print SERVER_PROT "struct ${name}_reply\n{\n";
            print SERVER_PROT "    struct reply_header __header;\n";
            $state++;
            next;
        }

        if (/^\@END/)
        {
            die "Misplaced \@END" unless ($state == 2 || $state == 3);
            print SERVER_PROT "};\n";

            if ($state == 2)  # build dummy reply struct
            {
                print SERVER_PROT "struct ${name}_reply\n{\n";
                print SERVER_PROT "    struct reply_header __header;\n";
                print SERVER_PROT "};\n";
            }

            # got a complete request
            push @requests, $name;
            DO_DUMP_FUNC( $name, "request", @in_struct);
            if ($#out_struct >= 0)
            {
                $replies{$name} = 1;
                DO_DUMP_FUNC( $name, "reply", @out_struct);
            }
            $state = 1;
            next;
        }

        if ($state != 1)
        {
            # skip empty lines (but keep them in output file)
            if (/^$/)
            {
                print SERVER_PROT "\n";
                next;
            }

            if (/^\s*VARARG\((\w+),(\w+),(\w+)\)/)
            {
                $var = $1;
                $type = "dump_varargs_" . $2 . "( min(cur_size,req->" . $3 . ") )";
                s!(VARARG\(.*\)\s*;)!/* $1 */!;
            }
            elsif (/^\s*VARARG\((\w+),(\w+)\)/)
            {
                $var = $1;
                $type = "dump_varargs_" . $2 . "( cur_size )";
                s!(VARARG\(.*\)\s*;)!/* $1 */!;
            }
            elsif (/^\s*(\w+\**(\s+\w+\**)*)\s+(\w+);/)
            {
                $type = $1;
                $var = $3;
                die "Unrecognized type $type" unless defined($formats{$type});
            }
            else
            {
                die "Unrecognized syntax $_";
            }
            if ($state == 2) { push @in_struct, $type, $var; }
            if ($state == 3) { push @out_struct, $type, $var; }
        }

        # Pass it through into the output file
        print SERVER_PROT $_ . "\n";
    }
    close PROTOCOL;
}

### Retrieve the server protocol version from the existing server_protocol.h file

sub GET_PROTOCOL_VERSION()
{
    my $protocol = 0;
    open SERVER_PROT, "include/wine/server_protocol.h" or return 0;
    while (<SERVER_PROT>)
    {
        if (/^\#define SERVER_PROTOCOL_VERSION (\d+)/) { $protocol = $1; last; }
    }
    close SERVER_PROT;
    return $protocol;
}

### Replace the contents of a file between ### make_requests ### marks

sub REPLACE_IN_FILE($@)
{
    my $name = shift;
    my @data = @_;
    my @lines = ();
    open(FILE,$name) or die "Can't open $name";
    while (<FILE>)
    {
	push @lines, $_;
	last if /\#\#\# make_requests begin \#\#\#/;
    }
    push @lines, "\n", @data;
    while (<FILE>)
    {
	if (/\#\#\# make_requests end \#\#\#/) { push @lines, "\n", $_; last; }
    }
    push @lines, <FILE>;
    open(FILE,">$name") or die "Can't modify $name";
    print FILE @lines;
    close(FILE);
}

### Main

# Get the server protocol version
my $protocol = GET_PROTOCOL_VERSION();

### Create server_protocol.h and print header

open SERVER_PROT, ">include/wine/server_protocol.h" or die "Cannot create include/wine/server_protocol.h";
print SERVER_PROT "/*\n * Wine server protocol definitions\n *\n";
print SERVER_PROT " * This file is automatically generated; DO NO EDIT!\n";
print SERVER_PROT " * Edit server/protocol.def instead and re-run tools/make_requests\n";
print SERVER_PROT " */\n\n";
print SERVER_PROT "#ifndef __WINE_WINE_SERVER_PROTOCOL_H\n";
print SERVER_PROT "#define __WINE_WINE_SERVER_PROTOCOL_H\n";

### Parse requests to find request/reply structure definitions

PARSE_REQUESTS();

### Build the request list and structures

print SERVER_PROT "\n\nenum request\n{\n";
foreach my $req (@requests) { print SERVER_PROT "    REQ_$req,\n"; }
print SERVER_PROT "    REQ_NB_REQUESTS\n};\n\n";

print SERVER_PROT "union generic_request\n{\n";
print SERVER_PROT "    struct request_max_size max_size;\n";
print SERVER_PROT "    struct request_header request_header;\n";
foreach my $req (@requests) { print SERVER_PROT "    struct ${req}_request ${req}_request;\n"; }
print SERVER_PROT "};\n";

print SERVER_PROT "union generic_reply\n{\n";
print SERVER_PROT "    struct request_max_size max_size;\n";
print SERVER_PROT "    struct reply_header reply_header;\n";
foreach my $req (@requests) { print SERVER_PROT "    struct ${req}_reply ${req}_reply;\n"; }
print SERVER_PROT "};\n\n";

printf SERVER_PROT "#define SERVER_PROTOCOL_VERSION %d\n\n", $protocol + 1;
print SERVER_PROT "#endif /* __WINE_WINE_SERVER_PROTOCOL_H */\n";
close SERVER_PROT;

### Output the dumping function tables

push @trace_lines, "static const dump_func req_dumpers[REQ_NB_REQUESTS] = {\n";
foreach my $req (@requests)
{
    push @trace_lines, "    (dump_func)dump_${req}_request,\n";
}
push @trace_lines, "};\n\n";

push @trace_lines, "static const dump_func reply_dumpers[REQ_NB_REQUESTS] = {\n";
foreach my $req (@requests)
{
    push @trace_lines, "    (dump_func)", $replies{$req} ? "dump_${req}_reply,\n" : "0,\n";
}
push @trace_lines, "};\n\n";

push @trace_lines, "static const char * const req_names[REQ_NB_REQUESTS] = {\n";
foreach my $req (@requests)
{
    push @trace_lines, "    \"$req\",\n";
}
push @trace_lines, "};\n";

REPLACE_IN_FILE( "server/trace.c", @trace_lines );

### Output the request handlers list

my @request_lines = ();

foreach my $req (@requests) { push @request_lines, "DECL_HANDLER($req);\n"; }
push @request_lines, "\n#ifdef WANT_REQUEST_HANDLERS\n\n";
push @request_lines, "typedef void (*req_handler)( const void *req, void *reply );\n";
push @request_lines, "static const req_handler req_handlers[REQ_NB_REQUESTS] =\n{\n";
foreach my $req (@requests)
{
    push @request_lines, "    (req_handler)req_$req,\n";
}
push @request_lines, "};\n#endif  /* WANT_REQUEST_HANDLERS */\n";

REPLACE_IN_FILE( "server/request.h", @request_lines );