/* ====================================================================
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 * reserved.
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 * modification, are permitted provided that the following conditions
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 *        Apache Software Foundation (http://www.apache.org/)."
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 *    if and wherever such third-party acknowledgments normally appear.
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 * ====================================================================
 *
 * This software consists of voluntary contributions made by many
 * individuals on behalf of the Apache Software Foundation.  For more
 * information on the Apache Software Foundation, please see
 * <http://www.apache.org/>.
 */

#ifndef APACHE_AP_MMN_H
#define APACHE_AP_MMN_H

/**
 * @package Module Magic Number
 */

/*
 * MODULE_MAGIC_NUMBER_MAJOR
 * Major API changes that could cause compatibility problems for older modules
 * such as structure size changes.  No binary compatibility is possible across
 * a change in the major version.
 *
 * MODULE_MAGIC_NUMBER_MINOR
 * Minor API changes that do not cause binary compatibility problems.
 * Should be reset to 0 when upgrading MODULE_MAGIC_NUMBER_MAJOR.
 *
 * See the MODULE_MAGIC_AT_LEAST macro below for an example.
 */

/*
 * 20010224 (2.0.13-dev) MODULE_MAGIC_COOKIE reset to "AP20"
 * 20010523 (2.0.19-dev) bump for scoreboard structure reordering
 * 20010627 (2.0.19-dev) more API changes than I can count
 * 20010726 (2.0.22-dev) more big API changes
 * 20010808 (2.0.23-dev) dir d_is_absolute bit introduced, bucket changes, etc
 * 20010825 (2.0.25-dev) removed d_is_absolute, introduced map_to_storage hook
 * 20011002 (2.0.26-dev) removed 1.3-depreciated request_rec.content_language
 * 20011127 (2.0.29-dev) bump for postconfig hook change, and removal of socket
 *                       from connection record
 * 20011212 (2.0.30-dev) bump for new used_path_info member of request_rec
 * 20011218 (2.0.30-dev) bump for new sbh member of conn_rec, different 
 *                       declarations for scoreboard, new parameter to
 *                       create_connection hook
 * 20020102 (2.0.30-dev) bump for changed type of limit_req_body in 
 *                       core_dir_config
 * 20020109 (2.0.31-dev) bump for changed shm and scoreboard declarations
 * 20020111 (2.0.31-dev) bump for ETag fields added at end of cor_dir_config
 * 20020114 (2.0.31-dev) mod_dav changed how it asks its provider to fulfill
 *                       a GET request
 * 20020118 (2.0.31-dev) Input filtering split of blocking and mode
 * 20020127 (2.0.31-dev) bump for pre_mpm hook change
 * 20020128 (2.0.31-dev) bump for pre_config hook change
 * 20020218 (2.0.33-dev) bump for AddOutputFilterByType directive
 * 20020220 (2.0.33-dev) bump for scoreboard.h structure change
 * 20020302 (2.0.33-dev) bump for protocol_filter additions.
 * 20020306 (2.0.34-dev) bump for filter type renames.
 */

#define MODULE_MAGIC_COOKIE 0x41503230UL /* "AP20" */

#ifndef MODULE_MAGIC_NUMBER_MAJOR
#define MODULE_MAGIC_NUMBER_MAJOR 20020306
#endif
#define MODULE_MAGIC_NUMBER_MINOR 0                     /* 0...n */
#define MODULE_MAGIC_NUMBER MODULE_MAGIC_NUMBER_MAJOR	/* backward compat */

/**
 * Determine if the server's current MODULE_MAGIC_NUMBER is at least a
 * specified value.
 * <pre>
 * Useful for testing for features.
 * For example, suppose you wish to use the apr_table_overlap
 *    function.  You can do this:
 * 
 * #if MODULE_MAGIC_AT_LEAST(19980812,2)
 *     ... use apr_table_overlap()
 * #else
 *     ... alternative code which doesn't use apr_table_overlap()
 * #endif
 * </pre>
 * @param major The major module magic number
 * @param minor The minor module magic number
 * @deffunc MODULE_MAGIC_AT_LEAST(int major, int minor)
 */
#define MODULE_MAGIC_AT_LEAST(major,minor)		\
    ((major) > MODULE_MAGIC_NUMBER_MAJOR 		\
	|| ((major) == MODULE_MAGIC_NUMBER_MAJOR 	\
	    && (minor) >= MODULE_MAGIC_NUMBER_MINOR))

#endif /* !APACHE_AP_MMN_H */