/**

 * \file include/conf.h

 * \brief Application interface library for the ALSA driver

 * \author Jaroslav Kysela <perex@perex.cz>

 * \author Abramo Bagnara <abramo@alsa-project.org>

 * \author Takashi Iwai <tiwai@suse.de>

 * \date 1998-2001

 *

 * Application interface library for the ALSA driver

 */

/*

 *   This library is free software; you can redistribute it and/or modify

 *   it under the terms of the GNU Lesser General Public License as

 *   published by the Free Software Foundation; either version 2.1 of

 *   the License, or (at your option) any later version.

 *

 *   This program is distributed in the hope that it will be useful,

 *   but WITHOUT ANY WARRANTY; without even the implied warranty of

 *   MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

 *   GNU Lesser General Public License for more details.

 *

 *   You should have received a copy of the GNU Lesser General Public

 *   License along with this library; if not, write to the Free Software

 *   Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301  USA

 *

 */

#ifndef __ALSA_CONF_H

#define __ALSA_CONF_H

#ifdef __cplusplus

extern "C" {

#endif

/**

 *  \defgroup Config Configuration Interface

 *  The configuration functions and types allow you to read, enumerate,

 *  modify and write the contents of ALSA configuration files.

 *  \{

 */

/** \brief \c dlsym version for the config evaluate callback. */

#define SND_CONFIG_DLSYM_VERSION_EVALUATE	_dlsym_config_evaluate_001

/** \brief \c dlsym version for the config hook callback. */

#define SND_CONFIG_DLSYM_VERSION_HOOK		_dlsym_config_hook_001

/** \brief Configuration node type. */

typedef enum _snd_config_type {

	/** Integer number. */

        SND_CONFIG_TYPE_INTEGER,

	/** 64-bit integer number. */

        SND_CONFIG_TYPE_INTEGER64,

	/** Real number. */

        SND_CONFIG_TYPE_REAL,

	/** Character string. */

        SND_CONFIG_TYPE_STRING,

        /** Pointer (runtime only, cannot be saved). */

        SND_CONFIG_TYPE_POINTER,

	/** Compound node. */

	SND_CONFIG_TYPE_COMPOUND = 1024

} snd_config_type_t;

/**

 * \brief Internal structure for a configuration node object.

 *

 * The ALSA library uses a pointer to this structure as a handle to a

 * configuration node. Applications don't access its contents directly.

 */

typedef struct _snd_config snd_config_t;

/**

 * \brief Type for a configuration compound iterator.

 *

 * The ALSA library uses this pointer type as a handle to a configuration

 * compound iterator. Applications don't directly access the contents of

 * the structure pointed to by this type.

 */

typedef struct _snd_config_iterator *snd_config_iterator_t;

/**

 * \brief Internal structure for a configuration private update object.

 *

 * The ALSA library uses this structure to save private update information.

 */

typedef struct _snd_config_update snd_config_update_t;

extern snd_config_t *snd_config;

const char *snd_config_topdir(void);

int snd_config_top(snd_config_t **config);

int snd_config_load(snd_config_t *config, snd_input_t *in);

int snd_config_load_override(snd_config_t *config, snd_input_t *in);

int snd_config_save(snd_config_t *config, snd_output_t *out);

int snd_config_update(void);

int snd_config_update_r(snd_config_t **top, snd_config_update_t **update, const char *path);

int snd_config_update_free(snd_config_update_t *update);

int snd_config_update_free_global(void);

int snd_config_update_ref(snd_config_t **top);

void snd_config_ref(snd_config_t *top);

void snd_config_unref(snd_config_t *top);

int snd_config_search(snd_config_t *config, const char *key,

		      snd_config_t **result);

int snd_config_searchv(snd_config_t *config, 

		       snd_config_t **result, ...);

int snd_config_search_definition(snd_config_t *config,

				 const char *base, const char *key,

				 snd_config_t **result);

int snd_config_expand(snd_config_t *config, snd_config_t *root,

		      const char *args, snd_config_t *private_data,

		      snd_config_t **result);

int snd_config_evaluate(snd_config_t *config, snd_config_t *root,

			snd_config_t *private_data, snd_config_t **result);

int snd_config_add(snd_config_t *config, snd_config_t *child);

int snd_config_add_before(snd_config_t *before, snd_config_t *child);

int snd_config_add_after(snd_config_t *after, snd_config_t *child);

int snd_config_remove(snd_config_t *config);

int snd_config_delete(snd_config_t *config);

int snd_config_delete_compound_members(const snd_config_t *config);

int snd_config_copy(snd_config_t **dst, snd_config_t *src);

int snd_config_make(snd_config_t **config, const char *key,

		    snd_config_type_t type);

int snd_config_make_integer(snd_config_t **config, const char *key);

int snd_config_make_integer64(snd_config_t **config, const char *key);

int snd_config_make_real(snd_config_t **config, const char *key);

int snd_config_make_string(snd_config_t **config, const char *key);

int snd_config_make_pointer(snd_config_t **config, const char *key);

int snd_config_make_compound(snd_config_t **config, const char *key, int join);

int snd_config_imake_integer(snd_config_t **config, const char *key, const long value);

int snd_config_imake_integer64(snd_config_t **config, const char *key, const long long value);

int snd_config_imake_real(snd_config_t **config, const char *key, const double value);

int snd_config_imake_string(snd_config_t **config, const char *key, const char *ascii);

int snd_config_imake_safe_string(snd_config_t **config, const char *key, const char *ascii);

int snd_config_imake_pointer(snd_config_t **config, const char *key, const void *ptr);

snd_config_type_t snd_config_get_type(const snd_config_t *config);

int snd_config_is_array(const snd_config_t *config);

int snd_config_set_id(snd_config_t *config, const char *id);

int snd_config_set_integer(snd_config_t *config, long value);

int snd_config_set_integer64(snd_config_t *config, long long value);

int snd_config_set_real(snd_config_t *config, double value);

int snd_config_set_string(snd_config_t *config, const char *value);

int snd_config_set_ascii(snd_config_t *config, const char *ascii);

int snd_config_set_pointer(snd_config_t *config, const void *ptr);

int snd_config_get_id(const snd_config_t *config, const char **value);

int snd_config_get_integer(const snd_config_t *config, long *value);

int snd_config_get_integer64(const snd_config_t *config, long long *value);

int snd_config_get_real(const snd_config_t *config, double *value);

int snd_config_get_ireal(const snd_config_t *config, double *value);

int snd_config_get_string(const snd_config_t *config, const char **value);

int snd_config_get_ascii(const snd_config_t *config, char **value);

int snd_config_get_pointer(const snd_config_t *config, const void **value);

int snd_config_test_id(const snd_config_t *config, const char *id);

snd_config_iterator_t snd_config_iterator_first(const snd_config_t *node);

snd_config_iterator_t snd_config_iterator_next(const snd_config_iterator_t iterator);

snd_config_iterator_t snd_config_iterator_end(const snd_config_t *node);

snd_config_t *snd_config_iterator_entry(const snd_config_iterator_t iterator);

/**

 * \brief Helper macro to iterate over the children of a compound node.

 * \param[in,out] pos Iterator variable for the current node.

 * \param[in,out] next Temporary iterator variable for the next node.

 * \param[in] node Handle to the compound configuration node to iterate over.

 *

 * Use this macro like a \c for statement, e.g.:

 * \code

 * snd_config_iterator_t pos, next;

 * snd_config_for_each(pos, next, node) {

 *     snd_config_t *entry = snd_config_iterator_entry(pos);

 *     ...

 * }

 * \endcode

 *

 * This macro allows deleting or removing the current node.

 */

#define snd_config_for_each(pos, next, node) \

	for (pos = snd_config_iterator_first(node), next = snd_config_iterator_next(pos); pos != snd_config_iterator_end(node); pos = next, next = snd_config_iterator_next(pos))

/* Misc functions */

int snd_config_get_bool_ascii(const char *ascii);

int snd_config_get_bool(const snd_config_t *conf);

int snd_config_get_ctl_iface_ascii(const char *ascii);

int snd_config_get_ctl_iface(const snd_config_t *conf);

/* Names functions */

/**

 * Device-name list element

 */

typedef struct snd_devname snd_devname_t;

/**

 * Device-name list element (definition)

 */

struct snd_devname {

	char *name;	/**< Device name string */

	char *comment;	/**< Comments */

	snd_devname_t *next;	/**< Next pointer */

};

int snd_names_list(const char *iface, snd_devname_t **list);

void snd_names_list_free(snd_devname_t *list);

/** \} */

#ifdef __cplusplus

}

#endif

#endif /* __ALSA_CONF_H */