include/util_cfgtree.h

   1 /* Licensed to the Apache Software Foundation (ASF) under one or more
   2  * contributor license agreements.  See the NOTICE file distributed with
   3  * this work for additional information regarding copyright ownership.
   4  * The ASF licenses this file to You under the Apache License, Version 2.0
   5  * (the "License"); you may not use this file except in compliance with
   6  * the License.  You may obtain a copy of the License at
   7  *
   8  *     http://www.apache.org/licenses/LICENSE-2.0
   9  *
  10  * Unless required by applicable law or agreed to in writing, software
  11  * distributed under the License is distributed on an "AS IS" BASIS,
  12  * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
  13  * See the License for the specific language governing permissions and
  14  * limitations under the License.
  15  */
  16
  17 /**
  18  * @file  util_cfgtree.h
  19  * @brief Config Tree Package
  20  *
  21  * @defgroup APACHE_CORE_CONFIG_TREE Config Tree Package
  22  * @ingroup  APACHE_CORE_CONFIG
  23  * @{
  24  */
  25
  26 #ifndef AP_CONFTREE_H
  27 #define AP_CONFTREE_H
  28
  29 #include "ap_config.h"
  30
  31 #ifdef __cplusplus
  32 extern "C" {
  33 #endif
  34
  35 typedef struct ap_directive_t ap_directive_t;
  36
  37 /**
  38  * @brief Structure used to build the config tree.
  39  *
  40  * The config tree only stores
  41  * the directives that will be active in the running server.  Directives
  42  * that contain other directions, such as &lt;Directory ...&gt; cause a sub-level
  43  * to be created, where the included directives are stored.  The closing
  44  * directive (&lt;/Directory&gt;) is not stored in the tree.
  45  */
  46 struct ap_directive_t {
  47     /** The current directive */
  48     const char *directive;
  49     /** The arguments for the current directive, stored as a space
  50      *  separated list */
  51     const char *args;
  52     /** The next directive node in the tree */
  53     struct ap_directive_t *next;
  54     /** The first child node of this directive */
  55     struct ap_directive_t *first_child;
  56     /** The parent node of this directive */
  57     struct ap_directive_t *parent;
  58
  59     /** directive's module can store add'l data here */
  60     void *data;
  61
  62     /* ### these may go away in the future, but are needed for now */
  63     /** The name of the file this directive was found in */
  64     const char *filename;
  65     /** The line number the directive was on */
  66     int line_num;
  67 };
  68
  69 /**
  70  * The root of the configuration tree
  71  * @var ap_directive_t *conftree
  72  */
  73 AP_DECLARE_DATA extern ap_directive_t *ap_conftree;
  74
  75 /**
  76  * Add a node to the configuration tree.
  77  * @param parent The current parent node.  If the added node is a first_child,
  78                  then this is changed to the current node
  79  * @param current The current node
  80  * @param toadd The node to add to the tree
  81  * @param child Is the node to add a child node
  82  * @return the added node
  83  */
  84 ap_directive_t *ap_add_node(ap_directive_t **parent, ap_directive_t *current,
  85                             ap_directive_t *toadd, int child);
  86
  87 #ifdef __cplusplus
  88 }
  89 #endif
  90
  91 #endif
  92 /** @} */