u_json.c File Reference

Tiny JSON wrapper around cJSON. More...

#include "util/u_json.h"
#include "util/u_logging.h"
#include <assert.h>
#include <stdio.h>
#include "cjson/cJSON.c"

Include dependency graph for u_json.c:

Functions
static const cJSON *	get (const cJSON *json, const char *f)
	Less typing. More...
const cJSON *	u_json_get (const cJSON *json, const char *f)
	Get a JSON object by string from a JSON object. More...
bool	u_json_get_string_into_array (const cJSON *json, char *out_str, size_t max_size)
	Parse a string from a JSON object into a char array. More...
bool	u_json_get_bool (const cJSON *json, bool *out_bool)
	Parse an bool from a JSON object. More...
bool	u_json_get_int (const cJSON *json, int *out_int)
	Parse an int from a JSON object. More...
bool	u_json_get_double (const cJSON *json, double *out_double)
	Parse a double from a JSON object. More...
bool	u_json_get_float (const cJSON *json, float *out_float)
	Parse a float from a JSON object. More...
bool	u_json_get_vec3 (const cJSON *json, struct xrt_vec3 *out_vec3)
	Parse an xrt_vec3 from a JSON object. More...
bool	u_json_get_vec3_array (const cJSON *json, struct xrt_vec3 *out_vec3)
	Parse an xrt_vec3 from a JSON array. More...
bool	u_json_get_vec3_f64_array (const cJSON *json, struct xrt_vec3_f64 *out_vec3)
	Parse an xrt_vec3_f64 from a JSON array. More...
bool	u_json_get_quat (const cJSON *json, struct xrt_quat *out_quat)
	Parse a quaternion from a JSON object. More...
bool	u_json_get_pose (const cJSON *json, struct xrt_pose *out_pose)
	Parse a pose from a JSON object, composed of a vec3 named "position" and a quat named "orientation". More...
bool	u_json_get_pose_permissive (const cJSON *json, struct xrt_pose *out_pose)
	Parse a pose from a JSON object, composed of a vec3 named "position", "translation", "location", "pos", or "loc" and a quat named "orientation". More...
size_t	u_json_get_float_array (const cJSON *json_array, float *out_array, size_t max_size)
	Parse up to max_size floats from a JSON array. More...
size_t	u_json_get_double_array (const cJSON *json_array, double *out_array, size_t max_size)
	Parse up to max_size doubles from a JSON array. More...
size_t	u_json_get_int_array (const cJSON *json_array, int *out_array, size_t max_size)
	Parse up to max_size int from a JSON array. More...
bool	u_json_get_matrix_3x3 (const cJSON *json, struct xrt_matrix_3x3 *out_matrix)
	Parse a matrix_3x3 from a JSON object. More...

Detailed Description

Tiny JSON wrapper around cJSON.

Author

Jakob Bornecrantz jakob.nosp@m.@col.nosp@m.labor.nosp@m.a.co.nosp@m.m

Rylie Pavlik rylie.nosp@m..pav.nosp@m.lik@c.nosp@m.olla.nosp@m.bora..nosp@m.com

Function Documentation

get()

static const cJSON * get ( const cJSON *  json, const char *  f  )

inlinestatic

Less typing.

Referenced by wrap::org::freedesktop::monado::ipc::Client::getFailed(), wrap::org::freedesktop::monado::ipc::Client::getMonado(), u_json_get(), u_json_get_quat(), and u_json_get_vec3().

u_json_get()

const cJSON * u_json_get	(	const cJSON *	json,
		const char *	f
	)

Get a JSON object by string from a JSON object.

Returns

The JSON object with the given name if successful, NULL if not.

References get().

Referenced by json_bool(), json_int(), json_rs2_format(), json_rs2_stream(), u_json_get_pose(), and u_json_get_pose_permissive().

u_json_get_bool()

bool u_json_get_bool	(	const cJSON *	json,
		bool *	out_bool
	)

Parse an bool from a JSON object.

Returns

true if successful, false if not.

Referenced by json_bool().

u_json_get_double()

bool u_json_get_double	(	const cJSON *	json,
		double *	out_double
	)

Parse a double from a JSON object.

Returns

true if successful, false if not.

Referenced by u_json_get_double_array(), and u_json_get_float().

u_json_get_double_array()

size_t u_json_get_double_array	(	const cJSON *	json_array,
		double *	out_array,
		size_t	max_size
	)

Parse up to max_size doubles from a JSON array.

Returns

the number of elements set.

References u_json_get_double(), and U_LOG_W.

u_json_get_float()

bool u_json_get_float	(	const cJSON *	json,
		float *	out_float
	)

Parse a float from a JSON object.

Returns

true if successful, false if not.

References u_json_get_double().

Referenced by u_json_get_float_array(), u_json_get_quat(), and u_json_get_vec3().

u_json_get_float_array()

size_t u_json_get_float_array	(	const cJSON *	json_array,
		float *	out_array,
		size_t	max_size
	)

Parse up to max_size floats from a JSON array.

Returns

the number of elements set.

References u_json_get_float(), and U_LOG_W.

u_json_get_int()

bool u_json_get_int	(	const cJSON *	json,
		int *	out_int
	)

Parse an int from a JSON object.

Returns

true if successful, false if not.

Referenced by json_int(), json_rs2_format(), json_rs2_stream(), and u_json_get_int_array().

u_json_get_int_array()

size_t u_json_get_int_array	(	const cJSON *	json_array,
		int *	out_array,
		size_t	max_size
	)

Parse up to max_size int from a JSON array.

Returns

the number of elements set.

References u_json_get_int(), and U_LOG_W.

u_json_get_matrix_3x3()

bool u_json_get_matrix_3x3	(	const cJSON *	json,
		struct xrt_matrix_3x3 *	out_matrix
	)

Parse a matrix_3x3 from a JSON object.

Returns

true if successful, false if not.

u_json_get_pose()

bool u_json_get_pose	(	const cJSON *	json,
		struct xrt_pose *	out_pose
	)

Parse a pose from a JSON object, composed of a vec3 named "position" and a quat named "orientation".

Returns

true if successful, false if not.

References u_json_get(), u_json_get_quat(), and u_json_get_vec3().

u_json_get_pose_permissive()

bool u_json_get_pose_permissive	(	const cJSON *	json,
		struct xrt_pose *	out_pose
	)

Parse a pose from a JSON object, composed of a vec3 named "position", "translation", "location", "pos", or "loc" and a quat named "orientation".

"rotation", or "rot"

Returns

true if successful, false if not.

References ARRAY_SIZE, u_json_get(), and u_json_get_vec3().

u_json_get_quat()

bool u_json_get_quat	(	const cJSON *	json,
		struct xrt_quat *	out_quat
	)

Parse a quaternion from a JSON object.

Returns

true if successful, false if not.

References get(), and u_json_get_float().

Referenced by u_json_get_pose().

u_json_get_string_into_array()

bool u_json_get_string_into_array	(	const cJSON *	json,
		char *	out,
		size_t	max_size
	)

Parse a string from a JSON object into a char array.

Returns

true if successful, false if string does not fit in array or any other error.

References U_LOG_E.

u_json_get_vec3()

bool u_json_get_vec3	(	const cJSON *	json,
		struct xrt_vec3 *	out_vec3
	)

Parse an xrt_vec3 from a JSON object.

Returns

true if successful, false if not.

References get(), and u_json_get_float().

Referenced by u_json_get_pose(), and u_json_get_pose_permissive().

u_json_get_vec3_array()

bool u_json_get_vec3_array	(	const cJSON *	json,
		struct xrt_vec3 *	out_vec3
	)

Parse an xrt_vec3 from a JSON array.

Returns

true if successful, false if not.

u_json_get_vec3_f64_array()

bool u_json_get_vec3_f64_array	(	const cJSON *	json,
		struct xrt_vec3_f64 *	out_vec3
	)

Parse an xrt_vec3_f64 from a JSON array.

Returns

true if successful, false if not.