#!/usr/bin/perl -w

#

# Licensed to the Apache Software Foundation (ASF) under one or more

# contributor license agreements.  See the NOTICE file distributed with

# this work for additional information regarding copyright ownership.

# The ASF licenses this file to You under the Apache License, Version 2.0

# (the "License"); you may not use this file except in compliance with

# the License.  You may obtain a copy of the License at

#

#     http://www.apache.org/licenses/LICENSE-2.0

#

# Unless required by applicable law or agreed to in writing, software

# distributed under the License is distributed on an "AS IS" BASIS,

# WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.

# See the License for the specific language governing permissions and

# limitations under the License.

use strict;

use Carp;

my $path=shift || '.';

findInDir($path);

foreach my $hook (sort keys %::Hooks) {

    my $h=$::Hooks{$hook};

    for my $x (qw(declared implemented type args)) {

	print "$hook datum '$x' missing\n" if !exists $h->{$x};

    }

    print "$hook\n";

    print "  declared in $h->{declared}\n" if defined $h->{declared};

    print "  implemented in $h->{implemented}\n" if defined $h->{implemented};

    print "  type is $h->{type}\n" if defined $h->{type};

    print "  $h->{ret} $hook($h->{args})\n" if defined $h->{args};

    print "\n";

}

sub findInDir {

    my $path=shift;

    local(*D);

    opendir(D,$path) || croak "Can't open $path: $!";

    while(my $f=readdir D) {

	next if $f=~/^\./;

	my $file="$path/$f";

	if(-d $file) {

	    findInDir($file);

	    next;

	}

	next if $file !~ /\.[ch]$/;

	scanFile($file);

    }

    closedir D;

}

sub scanFile {

    my $file=shift;

#   print "scanning $file\n";

    open(F,$file) || croak "Can't open $file: $!";

    while(<F>) {

	next if /\#define/;

	next if /\@deffunc/;

	if(/AP_DECLARE_HOOK\s*\(/) {

	    my($ret,$name,$args);

	    while(!(($ret,$name,$args)=

		   /AP_DECLARE_HOOK\s*\(\s*([^,]+)\s*,\s*([^,\s]+)\s*,\s*\((.*?)\)\)/s)) {

		chomp;

		# swallow subsequent lines if needed to get all the required info

		my $l=<F>;

		return unless defined $l;

		$l=~s/^\s*/ /;

		$_.=$l;

	    }

	    $ret=~s/\s*$//;

	    $args=~s/^\s*//; $args=~s/\s*$//;

#	    print "found $ret $name($args) in $file\n";

	    croak "$name declared twice! ($_)"

		if exists $::Hooks{$name}->{declared};

	    $::Hooks{$name}->{declared}=$file;

	    $::Hooks{$name}->{ret}=$ret;

	    $::Hooks{$name}->{args}=$args;

	}

	if(/AP_IMPLEMENT_HOOK_()(VOID)\(([^,\s]+)/

	   || /AP_IMPLEMENT(_OPTIONAL|)_HOOK_(.*?)\([^,]+?\s*,\s*([^,\s]+)/) {

	    my($type,$name)=($1 ? "OPTIONAL $2" : $2,$3);

#	    print "found $name $type in $file\n";

	    croak "$name implemented twice ($::Hooks{$name}->{implemented} and $file) ($_)"

		if exists $::Hooks{$name}->{implemented};

	    $::Hooks{$name}->{implemented}=$file;

	    $::Hooks{$name}->{type}=$type;

	}

    }

}