# 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.

#

#

# Based on apr's make_export.awk, which is

# based on Ryan Bloom's make_export.pl

/^#[ \t]*if(def)? (AP[RU]?_|!?defined).*/ {

	if (old_filename != FILENAME) {

		if (old_filename != "") printf("%s", line)

		macro_no = 0

		found = 0

		count = 0

		old_filename = FILENAME

		line = ""

	}

	macro_stack[macro_no++] = macro

	macro = substr($0, length($1)+2)

	count++

	line = line "#ifdef " macro "\n"

	next

}

/^#[ \t]*endif/ {

	if (count > 0) {

		count--

		line = line "#endif /* " macro " */\n"

		macro = macro_stack[--macro_no]

	}

	if (count == 0) {

		if (found != 0) {

			printf("%s", line)

		}

		line = ""

	}

	next

}

function add_symbol (sym_name) {

	if (count) {

		found++

	}

	for (i = 0; i < count; i++) {

		line = line "\t"

	}

	line = line sym_name "\n"

	if (count == 0) {

		printf("%s", line)

		line = ""

	}

}

/^[ \t]*(extern[ \t]+)?AP[RU]?_DECLARE_DATA .*;$/ {

       varname = $NF;

       gsub( /[*;]/, "", varname);

       gsub( /\[.*\]/, "", varname);

       add_symbol(varname);

}

END {

	printf("%s", line)

}