iio.h

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/* SPDX-License-Identifier: LGPL-2.1-or-later */
/*
 * libiio - Library for interfacing industrial I/O (IIO) devices
 *
 * Copyright (C) 2014 Analog Devices, Inc.
 * Author: Paul Cercueil <paul.cercueil@analog.com>
 */

#ifndef __IIO_H__
#define __IIO_H__

#ifndef DOXYGEN

#ifdef __cplusplus
extern "C" {
#endif

#include <limits.h>
#include <stdint.h>
#include <stdlib.h>
#include <stddef.h>
#include <stdio.h>

#if (defined(_WIN32) || defined(__MBED__))
#ifndef _SSIZE_T_DEFINED
typedef ptrdiff_t ssize_t;
#define _SSIZE_T_DEFINED
#endif
#else
#include <sys/types.h>
#endif

#if defined(_MSC_VER) && (_MSC_VER < 1800) && !defined(__BOOL_DEFINED)
#undef bool
#undef false
#undef true
#define bool char
#define false 0
#define true 1
#else
#include <stdbool.h>
#endif

#if defined(__GNUC__) && !defined(MATLAB_MEX_FILE) && !defined(MATLAB_LOADLIBRARY)
#ifndef __cnst
#define __cnst __attribute__((const))
#endif
#ifndef __pure
#define __pure __attribute__((pure))
#endif
#define __notused __attribute__((unused))
#ifdef IIO_CHECK_RET
#define __check_ret __attribute__((warn_unused_result))
#else
#define __check_ret
#endif
#else
#define __cnst
#define __pure
#define __notused
#define __check_ret
#endif

#if !defined(_WIN32) && __GNUC__ >= 4 && \
    !defined(MATLAB_MEX_FILE) && !defined(MATLAB_LOADLIBRARY)
#  define __iio_api_export __attribute__((visibility ("default")))
#  define __iio_api_import
#elif defined(_WIN32) && !defined(LIBIIO_STATIC)
#  define __iio_api_export __declspec(dllexport)
#  define __iio_api_import __declspec(dllimport)
#else
#  define __iio_api_export
#  define __iio_api_import
#endif

#ifdef LIBIIO_EXPORTS
#  define __iio_api __iio_api_export
#else
#  define __iio_api __iio_api_import
#endif

#define __api __iio_api

#endif /* DOXYGEN */

struct iio_block;
struct iio_context;
struct iio_device;
struct iio_channel;
struct iio_channels_mask;
struct iio_buffer;
struct iio_scan;
struct iio_stream;

enum iio_log_level {
    /* @brief No log output from the library */
    LEVEL_NOLOG = 1,

    /* @brief Only print error messages */
    LEVEL_ERROR = 2,

    /* @brief Also print warnings */
    LEVEL_WARNING = 3,

    /* @brief Also print noteworthy information */
    LEVEL_INFO = 4,

    /* @brief Also print debug messages */
    LEVEL_DEBUG = 5,
};

struct iio_context_params {
    unsigned int timeout_ms;

    FILE *out;

    FILE *err;

    enum iio_log_level log_level;

    enum iio_log_level stderr_level;
};

/*
 * <linux/iio/types.h> header guard to protect these enums from being defined
 * twice
 */
#ifndef _IIO_TYPES_H_
#define _IIO_TYPES_H_

enum iio_chan_type {
    IIO_VOLTAGE,
    IIO_CURRENT,
    IIO_POWER,
    IIO_ACCEL,
    IIO_ANGL_VEL,
    IIO_MAGN,
    IIO_LIGHT,
    IIO_INTENSITY,
    IIO_PROXIMITY,
    IIO_TEMP,
    IIO_INCLI,
    IIO_ROT,
    IIO_ANGL,
    IIO_TIMESTAMP,
    IIO_CAPACITANCE,
    IIO_ALTVOLTAGE,
    IIO_CCT,
    IIO_PRESSURE,
    IIO_HUMIDITYRELATIVE,
    IIO_ACTIVITY,
    IIO_STEPS,
    IIO_ENERGY,
    IIO_DISTANCE,
    IIO_VELOCITY,
    IIO_CONCENTRATION,
    IIO_RESISTANCE,
    IIO_PH,
    IIO_UVINDEX,
    IIO_ELECTRICALCONDUCTIVITY,
    IIO_COUNT,
    IIO_INDEX,
    IIO_GRAVITY,
    IIO_POSITIONRELATIVE,
    IIO_PHASE,
    IIO_MASSCONCENTRATION,
    IIO_CHAN_TYPE_UNKNOWN = INT_MAX
};

enum iio_modifier {
    IIO_NO_MOD,
    IIO_MOD_X,
    IIO_MOD_Y,
    IIO_MOD_Z,
    IIO_MOD_X_AND_Y,
    IIO_MOD_X_AND_Z,
    IIO_MOD_Y_AND_Z,
    IIO_MOD_X_AND_Y_AND_Z,
    IIO_MOD_X_OR_Y,
    IIO_MOD_X_OR_Z,
    IIO_MOD_Y_OR_Z,
    IIO_MOD_X_OR_Y_OR_Z,
    IIO_MOD_LIGHT_BOTH,
    IIO_MOD_LIGHT_IR,
    IIO_MOD_ROOT_SUM_SQUARED_X_Y,
    IIO_MOD_SUM_SQUARED_X_Y_Z,
    IIO_MOD_LIGHT_CLEAR,
    IIO_MOD_LIGHT_RED,
    IIO_MOD_LIGHT_GREEN,
    IIO_MOD_LIGHT_BLUE,
    IIO_MOD_QUATERNION,
    IIO_MOD_TEMP_AMBIENT,
    IIO_MOD_TEMP_OBJECT,
    IIO_MOD_NORTH_MAGN,
    IIO_MOD_NORTH_TRUE,
    IIO_MOD_NORTH_MAGN_TILT_COMP,
    IIO_MOD_NORTH_TRUE_TILT_COMP,
    IIO_MOD_RUNNING,
    IIO_MOD_JOGGING,
    IIO_MOD_WALKING,
    IIO_MOD_STILL,
    IIO_MOD_ROOT_SUM_SQUARED_X_Y_Z,
    IIO_MOD_I,
    IIO_MOD_Q,
    IIO_MOD_CO2,
    IIO_MOD_VOC,
    IIO_MOD_LIGHT_UV,
    IIO_MOD_LIGHT_DUV,
    IIO_MOD_PM1,
    IIO_MOD_PM2P5,
    IIO_MOD_PM4,
    IIO_MOD_PM10,
    IIO_MOD_ETHANOL,
    IIO_MOD_H2,
    IIO_MOD_O2,
    IIO_MOD_LINEAR_X,
    IIO_MOD_LINEAR_Y,
    IIO_MOD_LINEAR_Z,
    IIO_MOD_PITCH,
    IIO_MOD_YAW,
    IIO_MOD_ROLL,
};

enum iio_event_type {
    IIO_EV_TYPE_THRESH,
    IIO_EV_TYPE_MAG,
    IIO_EV_TYPE_ROC,
    IIO_EV_TYPE_THRESH_ADAPTIVE,
    IIO_EV_TYPE_MAG_ADAPTIVE,
    IIO_EV_TYPE_CHANGE,
    IIO_EV_TYPE_MAG_REFERENCED,
    IIO_EV_TYPE_GESTURE,
};

enum iio_event_direction {
    IIO_EV_DIR_EITHER,
    IIO_EV_DIR_RISING,
    IIO_EV_DIR_FALLING,
    IIO_EV_DIR_NONE,
    IIO_EV_DIR_SINGLETAP,
    IIO_EV_DIR_DOUBLETAP,
};

#endif /* _IIO_TYPES_H_ */

/* ---------------------------------------------------------------------------*/
/* ---------------------------- Error handling -------------------------------*/
static inline __check_ret void *iio_ptr(int err)
{
    return (void *)(intptr_t) err;
}

static inline __check_ret int iio_err(const void *ptr)
{
    return (uintptr_t) ptr >= (uintptr_t) -4095 ? (int)(intptr_t) ptr : 0;
}

static inline __check_ret void *iio_err_cast(const void *ptr)
{
    return (void *) ptr;
}
/* ------------------------------------------------------------------*/
/* ------------------------- Scan functions ----------------------------------*/
__api __check_ret struct iio_scan *
iio_scan(const struct iio_context_params *params, const char *backends);


__api void iio_scan_destroy(struct iio_scan *ctx);


__api __check_ret __pure size_t
iio_scan_get_results_count(const struct iio_scan *ctx);


__api __check_ret __pure const char *
iio_scan_get_description(const struct iio_scan *ctx, size_t idx);


__api __check_ret __pure const char *
iio_scan_get_uri(const struct iio_scan *ctx, size_t idx);

/* ------------------------------------------------------------------*/
/* ------------------------- Top-level functions -----------------------------*/
__api void iio_strerror(int err, char *dst, size_t len);


__api __check_ret __cnst bool iio_has_backend(const char *backend);


__api __check_ret __cnst unsigned int iio_get_backends_count(void);


__api __check_ret __cnst const char * iio_get_backend(unsigned int index);

/* ------------------------------------------------------------------*/
/* ------------------------- Context functions -------------------------------*/
__api __check_ret struct iio_context *
iio_create_context(const struct iio_context_params *params, const char *uri);


__api void iio_context_destroy(struct iio_context *ctx);


__api __pure unsigned int iio_context_get_version_major(const struct iio_context *ctx);


__api __pure unsigned int iio_context_get_version_minor(const struct iio_context *ctx);


__api __pure const char * iio_context_get_version_tag(const struct iio_context *ctx);


__api __check_ret __pure const char * iio_context_get_xml(const struct iio_context *ctx);


__api __check_ret __pure const char * iio_context_get_name(const struct iio_context *ctx);


__api __check_ret __pure const char * iio_context_get_description(
        const struct iio_context *ctx);


__api __check_ret __pure unsigned int iio_context_get_attrs_count(
        const struct iio_context *ctx);


__api __check_ret int iio_context_get_attr(
        const struct iio_context *ctx, unsigned int index,
        const char **name, const char **value);


__api __check_ret const char * iio_context_get_attr_value(
        const struct iio_context *ctx, const char *name);


__api __check_ret __pure unsigned int iio_context_get_devices_count(
        const struct iio_context *ctx);


__api __check_ret __pure struct iio_device * iio_context_get_device(
        const struct iio_context *ctx, unsigned int index);


__api __check_ret __pure struct iio_device * iio_context_find_device(
        const struct iio_context *ctx, const char *name);


__api __check_ret int iio_context_set_timeout(
        struct iio_context *ctx, unsigned int timeout_ms);


__api __cnst const struct iio_context_params *
iio_context_get_params(const struct iio_context *ctx);


__api void iio_context_set_data(struct iio_context *ctx, void *data);


__api void * iio_context_get_data(const struct iio_context *ctx);

/* ------------------------------------------------------------------*/
/* ------------------------- Device functions --------------------------------*/
__api __check_ret __pure const struct iio_context * iio_device_get_context(
        const struct iio_device *dev);


__api __check_ret __pure const char * iio_device_get_id(const struct iio_device *dev);


__api __check_ret __pure const char * iio_device_get_name(const struct iio_device *dev);


__api __check_ret __pure const char * iio_device_get_label(const struct iio_device *dev);


__api __check_ret __pure unsigned int iio_device_get_channels_count(
        const struct iio_device *dev);


__api __check_ret __pure unsigned int iio_device_get_attrs_count(
        const struct iio_device *dev);

__api __check_ret __pure unsigned int iio_device_get_buffer_attrs_count(
        const struct iio_device *dev);

__api __check_ret __pure struct iio_channel * iio_device_get_channel(
        const struct iio_device *dev, unsigned int index);


__api __check_ret __pure const char * iio_device_get_attr(
        const struct iio_device *dev, unsigned int index);

__api __check_ret __pure const char * iio_device_get_buffer_attr(
        const struct iio_device *dev, unsigned int index);

__api __check_ret __pure struct iio_channel * iio_device_find_channel(
        const struct iio_device *dev, const char *name, bool output);


__api __check_ret __pure const char * iio_device_find_attr(
        const struct iio_device *dev, const char *name);

__api __check_ret __pure const char * iio_device_find_buffer_attr(
        const struct iio_device *dev, const char *name);

__api __check_ret ssize_t
iio_device_attr_read_raw(const struct iio_device *dev,
             const char *attr, char *dst, size_t len);


#define iio_device_attr_read(dev, attr, ptr)            \
    _Generic((ptr),                     \
         bool *: iio_device_attr_read_bool,     \
         long long *: iio_device_attr_read_longlong,    \
         double *: iio_device_attr_read_double)(dev, attr, ptr)


__api __check_ret ssize_t
iio_device_attr_write_raw(const struct iio_device *dev,
              const char *attr, const void *src, size_t len);


#define iio_device_attr_write(dev, attr, val)           \
    _Generic((val),                     \
         const char *: iio_device_attr_write_string,    \
         char *: iio_device_attr_write_string,      \
         bool: iio_device_attr_write_bool,      \
         long long: iio_device_attr_write_longlong, \
         double: iio_device_attr_write_double)(dev, attr, val)


__api __check_ret ssize_t
iio_device_buffer_attr_read_raw(const struct iio_device *dev,
                unsigned int buf_id,
                const char *attr, char *dst, size_t len);


#define iio_device_buffer_attr_read(dev, buf_id, attr, ptr)     \
    _Generic((ptr),                         \
         bool *: iio_device_buffer_attr_read_bool,      \
         long long *: iio_device_buffer_attr_read_longlong, \
         double *: iio_device_buffer_attr_read_double)(dev, buf_id, attr, ptr)


__api __check_ret ssize_t
iio_device_buffer_attr_write_raw(const struct iio_device *dev,
                 unsigned int buf_id, const char *attr,
                 const void *src, size_t len);


#define iio_device_buffer_attr_write(dev, buf_id, attr, val)        \
    _Generic((val),                         \
         const char *: iio_device_buffer_attr_write_string, \
         char *: iio_device_buffer_attr_write_string,       \
         bool: iio_device_buffer_attr_write_bool,       \
         long long: iio_device_buffer_attr_write_longlong,  \
         double: iio_device_buffer_attr_write_double)(dev, buf_id, attr, val)


__api void iio_device_set_data(struct iio_device *dev, void *data);


__api void * iio_device_get_data(const struct iio_device *dev);


__api __check_ret int iio_device_get_trigger(const struct iio_device *dev,
        const struct iio_device **trigger);


__api __check_ret int iio_device_set_trigger(const struct iio_device *dev,
        const struct iio_device *trigger);


__api __check_ret __pure bool iio_device_is_trigger(const struct iio_device *dev);

/* ------------------------------------------------------------------*/
/* ------------------------- Channel functions -------------------------------*/
__api __check_ret __pure const struct iio_device * iio_channel_get_device(
        const struct iio_channel *chn);


__api __check_ret __pure const char * iio_channel_get_id(const struct iio_channel *chn);


__api __check_ret __pure const char * iio_channel_get_name(const struct iio_channel *chn);


__api __check_ret __pure bool iio_channel_is_output(const struct iio_channel *chn);


__api __check_ret __pure bool iio_channel_is_scan_element(const struct iio_channel *chn);


__api __check_ret __pure unsigned int iio_channel_get_attrs_count(
        const struct iio_channel *chn);


__api __check_ret __pure const char * iio_channel_get_attr(
        const struct iio_channel *chn, unsigned int index);


__api __check_ret __pure const char * iio_channel_find_attr(
        const struct iio_channel *chn, const char *name);


__api __check_ret __pure const char * iio_channel_attr_get_filename(
        const struct iio_channel *chn, const char *attr);


__api __check_ret ssize_t
iio_channel_attr_read_raw(const struct iio_channel *chn,
              const char *attr, char *dst, size_t len);


#define iio_channel_attr_read(chn, attr, ptr)           \
    _Generic((ptr),                     \
         bool *: iio_channel_attr_read_bool,        \
         long long *: iio_channel_attr_read_longlong,   \
         double *: iio_channel_attr_read_double)(chn, attr, ptr)


__api __check_ret ssize_t
iio_channel_attr_write_raw(const struct iio_channel *chn,
               const char *attr, const void *src, size_t len);


#define iio_channel_attr_write(chn, attr, val)          \
    _Generic((val),                     \
         const char *: iio_channel_attr_write_string,   \
         char *: iio_channel_attr_write_string,     \
         bool: iio_channel_attr_write_bool,     \
         long long: iio_channel_attr_write_longlong,    \
         double: iio_channel_attr_write_double)(chn, attr, val)


__api void iio_channel_enable(const struct iio_channel *chn,
                  struct iio_channels_mask *mask);


__api void iio_channel_disable(const struct iio_channel *chn,
                   struct iio_channels_mask *mask);


__api __check_ret bool
iio_channel_is_enabled(const struct iio_channel *chn,
               const struct iio_channels_mask *mask);


__api __check_ret size_t iio_channel_read(const struct iio_channel *chn,
                      const struct iio_block *block,
                      void *dst, size_t len, bool raw);


__api __check_ret size_t iio_channel_write(const struct iio_channel *chn,
                       struct iio_block *block,
                       const void *src, size_t len,
                       bool raw);


__api void iio_channel_set_data(struct iio_channel *chn, void *data);


__api void * iio_channel_get_data(const struct iio_channel *chn);


__api __check_ret __pure enum iio_chan_type iio_channel_get_type(
        const struct iio_channel *chn);


__api __check_ret __pure enum iio_modifier iio_channel_get_modifier(
        const struct iio_channel *chn);

/* ------------------------------------------------------------------*/
/* ------------------------- Buffer functions --------------------------------*/
__api __check_ret __pure const struct iio_device * iio_buffer_get_device(
        const struct iio_buffer *buf);


__api __check_ret struct iio_buffer *
iio_device_create_buffer(const struct iio_device *dev, unsigned int idx,
             const struct iio_channels_mask *mask);


__api void iio_buffer_set_data(struct iio_buffer *buf, void *data);


__api void * iio_buffer_get_data(const struct iio_buffer *buf);


__api void iio_buffer_destroy(struct iio_buffer *buf);


__api void iio_buffer_cancel(struct iio_buffer *buf);


__api __check_ret int iio_buffer_enable(struct iio_buffer *buf);


__api int iio_buffer_disable(struct iio_buffer *buf);


__api const struct iio_channels_mask *
iio_buffer_get_channels_mask(const struct iio_buffer *buf);

/* ------------------------------------------------------------------*/
/* -------------------------- Block functions --------------------------------*/
__api __check_ret struct iio_block *
iio_buffer_create_block(struct iio_buffer *buffer, size_t size);


__api void iio_block_destroy(struct iio_block *block);


__api void *iio_block_start(const struct iio_block *block);


__api void *iio_block_first(const struct iio_block *block,
                const struct iio_channel *chn);


__api void *iio_block_end(const struct iio_block *block);


__api __check_ret ssize_t
iio_block_foreach_sample(const struct iio_block *block,
             const struct iio_channels_mask *mask,
             ssize_t (*callback)(const struct iio_channel *chn,
                         void *src, size_t bytes, void *d),
             void *data);


__api int iio_block_enqueue(struct iio_block *block, size_t bytes_used, bool cyclic);


__api int iio_block_dequeue(struct iio_block *block, bool nonblock);


__api struct iio_buffer * iio_block_get_buffer(const struct iio_block *block);

/* ------------------------------------------------------------------*/
/* ------------------------- Stream functions --------------------------------*/
__api __check_ret struct iio_stream *
iio_buffer_create_stream(struct iio_buffer *buffer, size_t nb_blocks,
             size_t samples_count);


__api void
iio_stream_destroy(struct iio_stream *stream);


__api __check_ret const struct iio_block *
iio_stream_get_next_block(struct iio_stream *stream);

/* ------------------------------------------------------------------*/
/* ---------------------------- HWMON support --------------------------------*/
enum hwmon_chan_type {
    HWMON_VOLTAGE,
    HWMON_FAN,
    HWMON_PWM,
    HWMON_TEMP,
    HWMON_CURRENT,
    HWMON_POWER,
    HWMON_ENERGY,
    HWMON_HUMIDITY,
    HWMON_INTRUSION,
    HWMON_CHAN_TYPE_UNKNOWN = IIO_CHAN_TYPE_UNKNOWN,
};

static inline enum hwmon_chan_type
hwmon_channel_get_type(const struct iio_channel *chn)
{
    return (enum hwmon_chan_type) iio_channel_get_type(chn);
}

static inline bool iio_device_is_hwmon(const struct iio_device *dev)
{
    const char *id = iio_device_get_id(dev);

    return id[0] == 'h';
}

/* ------------------------------------------------------------------*/
/* ------------------------- Low-level functions -----------------------------*/
struct iio_data_format {
    unsigned int length;

    unsigned int bits;

    unsigned int shift;

    bool is_signed;

    bool is_fully_defined;

    bool is_be;

    bool with_scale;

    double scale;

    unsigned int repeat;
};


__api struct iio_channels_mask *
iio_create_channels_mask(unsigned int nb_channels);


__api void
iio_channels_mask_destroy(struct iio_channels_mask *mask);


__api __check_ret ssize_t
iio_device_get_sample_size(const struct iio_device *dev,
               const struct iio_channels_mask *mask);


__api __check_ret __pure long iio_channel_get_index(const struct iio_channel *chn);


__api __check_ret __cnst const struct iio_data_format * iio_channel_get_data_format(
        const struct iio_channel *chn);


__api void iio_channel_convert(const struct iio_channel *chn,
        void *dst, const void *src);


__api void iio_channel_convert_inverse(const struct iio_channel *chn,
        void *dst, const void *src);


__api __check_ret __pure unsigned int iio_device_get_debug_attrs_count(
        const struct iio_device *dev);


__api __check_ret __pure const char * iio_device_get_debug_attr(
        const struct iio_device *dev, unsigned int index);


__api __check_ret __pure const char * iio_device_find_debug_attr(
        const struct iio_device *dev, const char *name);


__api __check_ret ssize_t
iio_device_debug_attr_read_raw(const struct iio_device *dev,
                   const char *attr, char *dst, size_t len);


#define iio_device_debug_attr_read(dev, attr, ptr)          \
    _Generic((ptr),                         \
         bool *: iio_device_debug_attr_read_bool,       \
         long long *: iio_device_debug_attr_read_longlong,  \
         double *: iio_device_debug_attr_read_double)(dev, attr, ptr)


__api __check_ret ssize_t
iio_device_debug_attr_write_raw(const struct iio_device *dev,
                const char *attr, const void *src, size_t len);


#define iio_device_debug_attr_write(dev, attr, val)         \
    _Generic((val),                         \
         const char *: iio_device_debug_attr_write_string,  \
         char *: iio_device_debug_attr_write_string,        \
         bool: iio_device_debug_attr_write_bool,        \
         long long: iio_device_debug_attr_write_longlong,   \
         double: iio_device_debug_attr_write_double)(dev, attr, val)


__api __check_ret int iio_device_identify_filename(const struct iio_device *dev,
        const char *filename, struct iio_channel **chn,
        const char **attr);


__api __check_ret int iio_device_reg_write(struct iio_device *dev,
        uint32_t address, uint32_t value);


__api __check_ret int iio_device_reg_read(struct iio_device *dev,
        uint32_t address, uint32_t *value);


#ifndef DOXYGEN
/* These functions can be used directly, but should be used through the generic
 * macros iio_{device,channel,device_buffer,device_debug}_attr_{read,write}() */
__api __check_ret int
iio_device_attr_read_bool(const struct iio_device *dev,
              const char *attr, bool *val);
__api __check_ret int
iio_device_attr_read_longlong(const struct iio_device *dev,
                  const char *attr, long long *val);
__api __check_ret int
iio_device_attr_read_double(const struct iio_device *dev,
                const char *attr, double *val);
__api __check_ret ssize_t
iio_device_attr_write_string(const struct iio_device *dev,
                 const char *attr, const char *src);
__api __check_ret int
iio_device_attr_write_bool(const struct iio_device *dev,
               const char *attr, bool val);
__api __check_ret int
iio_device_attr_write_longlong(const struct iio_device *dev,
                   const char *attr, long long val);
__api __check_ret int
iio_device_attr_write_double(const struct iio_device *dev,
                 const char *attr, double val);
__api __check_ret int
iio_device_buffer_attr_read_bool(const struct iio_device *dev,
                 unsigned int buf_id,
                 const char *attr, bool *val);
__api __check_ret int
iio_device_buffer_attr_read_longlong(const struct iio_device *dev,
                     unsigned int buf_id,
                     const char *attr, long long *val);
__api __check_ret int
iio_device_buffer_attr_read_double(const struct iio_device *dev,
                   unsigned int buf_id,
                   const char *attr, double *val);
__api __check_ret ssize_t
iio_device_buffer_attr_write_string(const struct iio_device *dev,
                    unsigned int buf_id,
                    const char *attr, const char *src);
__api __check_ret int
iio_device_buffer_attr_write_bool(const struct iio_device *dev,
                  unsigned int buf_id,
                  const char *attr, bool val);
__api __check_ret int
iio_device_buffer_attr_write_longlong(const struct iio_device *dev,
                      unsigned int buf_id,
                      const char *attr, long long val);
__api __check_ret int
iio_device_buffer_attr_write_double(const struct iio_device *dev,
                    unsigned int buf_id,
                    const char *attr, double val);
__api __check_ret int
iio_channel_attr_read_bool(const struct iio_channel *chn,
               const char *attr, bool *val);
__api __check_ret int
iio_channel_attr_read_longlong(const struct iio_channel *chn,
                   const char *attr, long long *val);
__api __check_ret int
iio_channel_attr_read_double(const struct iio_channel *chn,
                 const char *attr, double *val);
__api __check_ret ssize_t
iio_channel_attr_write_string(const struct iio_channel *chn,
                  const char *attr, const char *src);
__api __check_ret
int iio_channel_attr_write_bool(const struct iio_channel *chn,
                const char *attr, bool val);
__api __check_ret int
iio_channel_attr_write_longlong(const struct iio_channel *chn,
                const char *attr, long long val);
__api __check_ret int
iio_channel_attr_write_double(const struct iio_channel *chn,
                  const char *attr, double val);
__api __check_ret int
iio_device_debug_attr_read_bool(const struct iio_device *dev,
                const char *attr, bool *val);
__api __check_ret int
iio_device_debug_attr_read_longlong(const struct iio_device *dev,
                    const char *attr, long long *val);
__api __check_ret int
iio_device_debug_attr_read_double(const struct iio_device *dev,
                  const char *attr, double *val);
__api __check_ret ssize_t
iio_device_debug_attr_write_string(const struct iio_device *dev,
                   const char *attr, const char *src);
__api __check_ret int
iio_device_debug_attr_write_bool(const struct iio_device *dev,
                 const char *attr, bool val);
__api __check_ret int
iio_device_debug_attr_write_longlong(const struct iio_device *dev,
                     const char *attr, long long val);
__api __check_ret int
iio_device_debug_attr_write_double(const struct iio_device *dev,
                   const char *attr, double val);
#endif /* DOXYGEN */

#ifdef __cplusplus
}
#endif

#undef __api

#endif /* __IIO_H__ */