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config.h
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config.h
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/*! \file config.h
* \author Lorenzo Miniero <[email protected]>
* \copyright GNU General Public License v3
* \brief Configuration files parsing (headers)
* \details Implementation of a parser of INI and libconfig configuration files.
*
* \ingroup core
* \ref core
*/
#ifndef _JANUS_CONFIG_H
#define _JANUS_CONFIG_H
#include <glib.h>
/*! \brief Configuration element type */
typedef enum janus_config_type {
/*! \brief Anything (just for searches) */
janus_config_type_any = 1,
/*! \brief Plain item */
janus_config_type_item,
/*! \brief Category */
janus_config_type_category,
/*! \brief Array */
janus_config_type_array,
} janus_config_type;
/*! \brief Generic configuration container (can be an item, a category or an array) */
typedef struct janus_config_container {
/*! \brief Whether this is a category, an item or an array */
janus_config_type type;
/*! \brief Name of the item/category/array */
const char *name;
/*! \brief Value of the item (item only) */
const char *value;
/*! \brief Linked list of contained items/categories/arrays (category and array only) */
GList *list;
} janus_config_container;
/*! \brief Configuration item (defined for backwards compatibility) */
typedef struct janus_config_container janus_config_item;
/*! \brief Configuration category (defined for backwards compatibility) */
typedef struct janus_config_container janus_config_category;
/*! \brief Configuration array */
typedef struct janus_config_container janus_config_array;
/*! \brief Configuration container */
typedef struct janus_config {
/*! \brief Whether this is a libconfig (jcfg for us) or an INI config */
gboolean is_jcfg;
/*! \brief Name of the configuration */
const char *name;
/*! \brief Linked list of items/categories/arrays */
GList *list;
} janus_config;
/*! \brief Method to parse an INI configuration file
* @param[in] config_file Path to the configuration file
* @returns A pointer to a valid janus_config instance if successful, NULL otherwise */
janus_config *janus_config_parse(const char *config_file);
/*! \brief Method to create a new, empty, configuration
* @param[in] name Name to give to the configuration
* @returns A pointer to a valid janus_config instance if successful, NULL otherwise */
janus_config *janus_config_create(const char *name);
/*! \brief Helper method to print a configuration on the standard output
* @note This prints with LOG_VERB: if you need the configuration to be visible at
* a different debugging level, use janus_config_print_as instead
* @param[in] config The configuration to print */
void janus_config_print(janus_config *config);
/*! \brief Helper method to print a configuration on the standard output
* using a different logging level than LOG_VERB
* @param[in] config The configuration to print
* @param[in] level The debugging level to use */
void janus_config_print_as(janus_config *config, int level);
/*! \brief Helper method to save a configuration to a file
* @param[in] config The configuration to sav
* @param[in] folder The folder the file should be saved to
* @param[in] filename The file name, extension included (should be .cfg)
* @returns 0 if successful, a negative integer otherwise */
int janus_config_save(janus_config *config, const char *folder, const char *filename);
/*! \brief Destroy a configuration container instance
* @param[in] config The configuration to destroy */
void janus_config_destroy(janus_config *config);
/*! \brief Method to create a new janus_config_item instance from name and value
* @param[in] name Name to give to the item
* @param[in] value Value of the item (optional)
* @returns A valid janus_config_item instance if successful, NULL otherwise */
janus_config_item *janus_config_item_create(const char *name, const char *value);
/*! \brief Method to create a new janus_config_category instance
* @param[in] name Name to give to the category
* @returns A pointer to a valid janus_config_category instance if successful, NULL otherwise */
janus_config_category *janus_config_category_create(const char *name);
/*! \brief Method to create a new janus_config_array instance
* @param[in] name Name to give to the array
* @returns A valid janus_config_array instance if successful, NULL otherwise */
janus_config_array *janus_config_array_create(const char *name);
/*! \brief Helper method to quickly destroy an item, category or array
* @note This method also destroys anything it contains, if it's a category or
* array, but will not unlink the object from its parent: this is up to the caller
* @param[in] container The item/category/array to destroy */
void janus_config_container_destroy(janus_config_container *container);
/*! \brief Helper method to quickly get an item, category, or array
* @note If the parent container is NULL, the lookup is done at the root. If something is found
* but type doesn't match (name is an array but we're looking for a category), NULL is returned.
* @param[in] config The configuration instance
* @param[in] parent The parent container (category or array), if any
* @param[in] type The type of container to look for
* @param[in] name The name of the item/category/array to look for
* @returns A pointer to a valid janus_config_container instance if successful, NULL otherwise */
janus_config_container *janus_config_get(janus_config *config,
janus_config_container *parent, janus_config_type type, const char *name);
/*! \brief Same as janus_config_get, but creates the element if it doesn't exist
* @note Nothing is created if type is janus_config_type_any.
* @param[in] config The configuration instance
* @param[in] parent The parent container (category or array), if any
* @param[in] type The type of container to look for
* @param[in] name The name of the item/category/array to look for
* @returns A pointer to a valid janus_config_container instance if successful, NULL otherwise */
janus_config_container *janus_config_get_create(janus_config *config,
janus_config_container *parent, janus_config_type type, const char *name);
/*! \brief Helper method to quickly lookup an item, category, or array
* @note If something is found but type doesn't match (name is an array
* but we're looking for a category), NULL is returned.
* @param[in] config The configuration instance
* @returns A pointer to a valid janus_config_container instance if successful, NULL otherwise */
janus_config_container *janus_config_search(janus_config *config, ...);
/*! \brief Add an item/category/array instance to a category or array
* \note If adding to a category and the item/category/array already exists, it is replaced;
* it is appended if the target is an array instead, where duplicates are accepted.
* @param[in] config The configuration instance
* @param[in] parent The category or array to add the item to, if any
* @param[in] item The item/category/array to add
* @returns 0 if successful, a negative integer otherwise */
int janus_config_add(janus_config *config, janus_config_container *parent, janus_config_container *item);
/*! \brief Remove an existing item with the specific name from a category/array
* @param[in] config The configuration instance
* @param[in] parent The category/array to remove the item from, if any
* @param[in] name The name of the item/category/array to remove
* @returns 0 if successful, a negative integer otherwise */
int janus_config_remove(janus_config *config, janus_config_container *parent, const char *name);
/*! \brief Helper method to return the list of plain items, either in root or from a parent
* @note The method returns a new GList: it's up to the caller to free it. The values
* of the list data must NOT be freed, though, as it's just linked from the configuration.
* @param[in] config The configuration instance
* @param[in] parent The parent container (category or array), if any
* @returns A pointer to the categories GLib linked list of items if successful, NULL otherwise */
GList *janus_config_get_items(janus_config *config, janus_config_container *parent);
/*! \brief Helper method to return the list of categories, either in root or from a parent
* @note The method returns a new GList: it's up to the caller to free it. The values
* of the list data must NOT be freed, though, as it's just linked from the configuration.
* @param[in] config The configuration instance
* @param[in] parent The parent container (category or array), if any
* @returns A pointer to the categories GLib linked list of categories if successful, NULL otherwise */
GList *janus_config_get_categories(janus_config *config, janus_config_container *parent);
/*! \brief Helper method to return the list of arrays, either in root or from a parent
* @note The method returns a new GList: it's up to the caller to free it. The values
* of the list data must NOT be freed, though, as it's just linked from the configuration.
* @param[in] config The configuration instance
* @param[in] parent The parent container (category or array), if any
* @returns A pointer to the categories GLib linked list of arrays if successful, NULL otherwise */
GList *janus_config_get_arrays(janus_config *config, janus_config_container *parent);
#endif