* @param parms The cmd_parms to pass to all functions
 * @param section_vector The per-section config vector.
 * @return Error string on error, NULL otherwise
 */
AP_DECLARE(const char *) ap_walk_config(ap_directive_t *conftree,
                                        cmd_parms *parms,
                                        ap_conf_vector_t *section_vector);

/**
 * @defgroup ap_check_cmd_context ap_check_cmd_context
 * @{
 */
/**
 * Check the context a command is used in.
 * @param cmd The command to check
 * @param forbidden Where the command is forbidden.
 * @return Error string on error, NULL on success
 */
AP_DECLARE(const char *) ap_check_cmd_context(cmd_parms *cmd, 
                                              unsigned forbidden);

#define  NOT_IN_VIRTUALHOST     0x01 /**< Forbidden in <Virtualhost> */
#define  NOT_IN_LIMIT           0x02 /**< Forbidden in <Limit> */
#define  NOT_IN_DIRECTORY       0x04 /**< Forbidden in <Directory> */
#define  NOT_IN_LOCATION        0x08 /**< Forbidden in <Location> */
#define  NOT_IN_FILES           0x10 /**< Forbidden in <Files> */
/** Forbidden in <Directory>/<Location>/<Files>*/
#define  NOT_IN_DIR_LOC_FILE    (NOT_IN_DIRECTORY|NOT_IN_LOCATION|NOT_IN_FILES) 
/** Forbidden in <VirtualHost>/<Limit>/<Directory>/<Location>/<Files> */
#define  GLOBAL_ONLY            (NOT_IN_VIRTUALHOST|NOT_IN_LIMIT|NOT_IN_DIR_LOC_FILE) 

/** @} */

#ifdef CORE_PRIVATE

/**
 * The topmost module in the list
 * @defvar module *ap_top_module
 */
AP_DECLARE_DATA extern module *ap_top_module;

/**
 * Array of all statically linked modules
 * @defvar module *ap_prelinked_modules[]
 */
AP_DECLARE_DATA extern module *ap_prelinked_modules[];
/**
 * Array of all preloaded modules
 * @defvar module *ap_preloaded_modules[]
 */
AP_DECLARE_DATA extern module *ap_preloaded_modules[];
/**
 * Array of all loaded modules
 * @defvar module **ap_loaded_modules
 */
AP_DECLARE_DATA extern module **ap_loaded_modules;

/* For mod_so.c... */
/** Run a single module's two create_config hooks
 *  @param p the pool to allocate from
 *  @param s The server to configure for.
 *  @param m The module to configure
 */
AP_DECLARE(void) ap_single_module_configure(apr_pool_t *p, server_rec *s, 
                                            module *m);

/* For http_main.c... */
/**
 * Add all of the prelinked modules into the loaded module list
 * @param process The process that is currently running the server
 */
AP_DECLARE(void) ap_setup_prelinked_modules(process_rec *process);

/**
 * Show the preloaded configuration directives, the help string explaining
 * the directive arguments, in what module they are handled, and in
 * what parts of the configuration they are allowed.  Used for httpd -h.
 */
AP_DECLARE(void) ap_show_directives(void);

/** 
 * Show the preloaded module names.  Used for httpd -l. 
 */
AP_DECLARE(void) ap_show_modules(void);

/** 
 * Show the MPM name.  Used in reporting modules such as mod_info to
 * provide extra information to the user
 */
AP_DECLARE(const char *) ap_show_mpm(void);

/**
 * Read all config files and setup the server
 * @param process The process running the server
 * @param temp_pool A pool to allocate temporary data from.
 * @param config_name The name of the config file
 * @param conftree Place to store the root of the config tree
 * @return The setup server_rec list.
 */
AP_DECLARE(server_rec *) ap_read_config(process_rec *process, 
                                        apr_pool_t *temp_pool, 
                                        const char *config_name, 
                                        ap_directive_t **conftree);

/**
 * Run all rewrite args hooks for loaded modules
 * @param process The process currently running the server
 */
AP_DECLARE(void) ap_run_rewrite_args(process_rec *process);

/**
 * Run the register hooks function for a specified module
 * @param m The module to run the register hooks function fo
 * @param p The pool valid for the lifetime of the module
 */
AP_DECLARE(void) ap_register_hooks(module *m, apr_pool_t *p);

/**
 * Setup all virtual hosts
 * @param p The pool to allocate from
 * @param main_server The head of the server_rec list
 */
AP_DECLARE(void) ap_fixup_virtual_hosts(apr_pool_t *p, 
                                        server_rec *main_server);

/* For http_request.c... */

/**
 * Setup the config vector for a request_rec
 * @param p The pool to allocate the config vector from
 * @return The config vector
 */
AP_CORE_DECLARE(ap_conf_vector_t*) ap_create_request_config(apr_pool_t *p);

/**
 * Setup the config vector for per dir module configs
 * @param p The pool to allocate the config vector from
 * @return The config vector
 */
AP_CORE_DECLARE(ap_conf_vector_t *) ap_create_per_dir_config(apr_pool_t *p);

/**
 * Run all of the modules merge per dir config functions
 * @param p The pool to pass to the merge functions
 * @param base The base directory config structure
 * @param new_conf The new directory config structure
 */
AP_CORE_DECLARE(ap_conf_vector_t*) ap_merge_per_dir_configs(apr_pool_t *p,
                                           ap_conf_vector_t *base,
                                           ap_conf_vector_t *new_conf);

/* For http_connection.c... */
/**
 * Setup the config vector for a connection_rec
 * @param p The pool to allocate the config vector from
 * @return The config vector
 */
AP_CORE_DECLARE(ap_conf_vector_t*) ap_create_conn_config(apr_pool_t *p);

/* For http_core.c... (<Directory> command and virtual hosts) */

/**
 * parse an htaccess file
 * @param resulting htaccess_result
 * @param r The request currently being served
 * @param override Which overrides are active
 * @param path The path to the htaccess file
 * @param access_name The list of possible names for .htaccess files
 * int The status of the current request
 */
AP_CORE_DECLARE(int) ap_parse_htaccess(ap_conf_vector_t **result, 
                                       request_rec *r, int override,
                                       const char *path, 
                                       const char *access_name);

/**
 * Setup a virtual host
 * @param p The pool to allocate all memory from
 * @param hostname The hostname of the virtual hsot
 * @param main_server The main server for this Apache configuration
 * @param ps Place to store the new server_rec
 * return Error string on error, NULL on success
 */
AP_CORE_DECLARE(const char *) ap_init_virtual_host(apr_pool_t *p, 
                                                   const char *hostname,
                                                   server_rec *main_server, 
                                                   server_rec **);

/**
 * Process the config file for Apache
 * @param s The server rec to use for the command parms
 * @param fname The name of the config file
 * @param conftree The root node of the created config tree
 * @param p Pool for general allocation
 * @param ptem Pool for temporary allocation
 */
AP_DECLARE(void) ap_process_resource_config(server_rec *s, const char *fname, 
                                            ap_directive_t **conftree, 
                                            apr_pool_t *p, apr_pool_t *ptemp);

/**
 * Process all directives in the config tree
 * @param s The server rec to use in the command parms
 * @param conftree The config tree to process
 * @param p The pool for general allocation
 * @param ptemp The pool for temporary allocations
 */
AP_DECLARE(void) ap_process_config_tree(server_rec *s, ap_directive_t *conftree,
                                        apr_pool_t *p, apr_pool_t *ptemp);

/* Module-method dispatchers, also for http_request.c */
/**
 * Run the handler phase of each module until a module accepts the
 * responsibility of serving the request
 * @param r The current request
 * @return The status of the current request
 */
AP_CORE_DECLARE(int) ap_invoke_handler(request_rec *r);

/* for mod_perl */

/**
 * Find a given directive in a command_rec table
 * @param name The directive to search for
 * @param cmds The table to search
 * @return The directive definition of the specified directive
 */
AP_CORE_DECLARE(const command_rec *) ap_find_command(const char *name, 
                                                     const command_rec *cmds);

/**
 * Find a given directive in a list module
 * @param cmd_name The directive to search for
 * @param mod The module list to search
 * @return The directive definition of the specified directive
 */
AP_CORE_DECLARE(const command_rec *) ap_find_command_in_modules(const char *cmd_name, 
                                                                module **mod);

/**
 * Ask a module to create per-server and per-section (dir/loc/file) configs
 * (if it hasn't happened already). The results are stored in the server's
 * config, and the specified per-section config vector.
 * @param server The server to operate upon.
 * @param section_vector The per-section config vector.
 * @param section Which section to create a config for.
 * @param mod The module which is defining the config data.
 * @param pconf A pool for all configuration allocations.
 * @return The (new) per-section config data.
 */
AP_CORE_DECLARE(void *) ap_set_config_vectors(server_rec *server,
                                              ap_conf_vector_t *section_vector,
                                              const char *section,
                                              module *mod, apr_pool_t *pconf);

#endif

  /* Hooks */

/**
 * Run the header parser functions for each module
 * @param r The current request
 * @return OK or DECLINED
 */
AP_DECLARE_HOOK(int,header_parser,(request_rec *r))

/**
 * Run the pre_config function for each module
 * @param pconf The config pool
 * @param plog The logging streams pool
 * @param ptemp The temporary pool
 * @return OK or DECLINED on success anything else is a error
 */
AP_DECLARE_HOOK(int,pre_config,(apr_pool_t *pconf,apr_pool_t *plog,
                                apr_pool_t *ptemp))


/**
 * Run the post_config function for each module
 * @param pconf The config pool
 * @param plog The logging streams pool
 * @param ptemp The temporary pool
 * @param s The list of server_recs
 * @return OK or DECLINED on success anything else is a error
 */
AP_DECLARE_HOOK(int,post_config,(apr_pool_t *pconf,apr_pool_t *plog,
                                 apr_pool_t *ptemp,server_rec *s))

/**
 * Run the open_logs functions for each module
 * @param pconf The config pool
 * @param plog The logging streams pool
 * @param ptemp The temporary pool
 * @param s The list of server_recs
 * @return OK or DECLINED on success anything else is a error
 */
AP_DECLARE_HOOK(int,open_logs,(apr_pool_t *pconf,apr_pool_t *plog,
                               apr_pool_t *ptemp,server_rec *s))

/**
 * Run the child_init functions for each module
 * @param pchild The child pool
 * @param s The list of server_recs in this server 
 */
AP_DECLARE_HOOK(void,child_init,(apr_pool_t *pchild, server_rec *s))

/**
 * Run the handler functions for each module
 * @param r The request_rec
 * @remark non-wildcard handlers should HOOK_MIDDLE, wildcard HOOK_LAST
 */
AP_DECLARE_HOOK(int,handler,(request_rec *r))

/**
 * Run the quick handler functions for each module. The quick_handler
 * is run before any other requests hooks are called (location_walk,
 * directory_walk, access checking, et. al.). This hook was added
 * to provide a quick way to serve content from a URI keyed cache.
 * 
 * @param r The request_rec
 * @param lookup_uri Controls whether the caller actually wants content or not.
 * lookup is set when the quick_handler is called out of 
 * ap_sub_req_lookup_uri()
 */
AP_DECLARE_HOOK(int,quick_handler,(request_rec *r, int lookup_uri))

/**
 * Retrieve the optional functions for each module.
 * This is run immediately before the server starts. Optional functions should
 * be registered during the hook registration phase.
 */
AP_DECLARE_HOOK(void,optional_fn_retrieve,(void))

#ifdef __cplusplus
}
#endif

#endif	/* !APACHE_HTTP_CONFIG_H */