Generic data container for physical data interface. More...

Detailed Description

Generic data container for physical data interface.

Author: Hauke Petersen hauke.nosp@m..pet.nosp@m.ersen.nosp@m.@fu-.nosp@m.berli.nosp@m.n.de

Definition in file phydat.h.

#include <stddef.h>
#include <stdint.h>
#include <sys/types.h>
#include "modules.h"

Include dependency graph for phydat.h:

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Data Structures
struct	phydat_t
	Generic data structure for expressing physical values. More...

Macros
#define	PHYDAT_DIM (3U)
	The fixed number of dimensions we work with.

#define	PHYDAT_SCALE_STR_MAXLEN (sizeof("*E-128\0"))
	The maximum length of a scaling string.

#define	PHYDAT_MIN (INT16_MIN)
	Minimum value for phydat_t::val.

#define	PHYDAT_MAX (INT16_MAX)
	Maximum value for phydat_t::val.

Enumerations
enum	{ UNIT_UNDEF , UNIT_NONE , UNIT_TEMP_C , UNIT_TEMP_F , UNIT_TEMP_K , UNIT_LUX , UNIT_M , UNIT_M2 , UNIT_M3 , UNIT_G_FORCE , UNIT_G = UNIT_G_FORCE , UNIT_DPS , UNIT_GRAM , UNIT_GR = UNIT_GRAM , UNIT_A , UNIT_V , UNIT_W , UNIT_GAUSS , UNIT_GS = UNIT_GAUSS , UNIT_T , UNIT_DBM , UNIT_COULOMB , UNIT_F , UNIT_OHM , UNIT_PH , UNIT_BAR , UNIT_PA , UNIT_CD , UNIT_BOOL , UNIT_CTS , UNIT_PERCENT , UNIT_PERMILL , UNIT_PPM , UNIT_PPB , UNIT_TIME , UNIT_DATE , UNIT_GPM3 , UNIT_CPM3 }
	Definition of physical units and comparable data types. More...

Functions
void	phydat_dump (phydat_t *data, uint8_t dim)
	Dump the given data container to STDIO.

void	phydat_unit_print (uint8_t unit)
	Print a unit.

ssize_t	phydat_unit_write (char *dest, size_t max_size, uint8_t unit)
	Write the string representation of the given unit into the given buffer.

char	phydat_prefix_from_scale (int8_t scale)
	Convert the given scale factor to an SI prefix.

void	phydat_fit (phydat_t dat, const int32_t values, unsigned int dim)
	Scale integer value(s) to fit into a phydat_t.

size_t	phydat_to_json (const phydat_t data, size_t dim, char buf)
	Convert the given phydat_t structure into a JSON string.

int64_t	phydat_date_time_to_unix (phydat_t date, phydat_t time, int32_t offset_seconds)
	Convert a date and time contained in phydat structs to a Unix timestamp.

int64_t	phydat_unix (int16_t year, int16_t month, int16_t day, int16_t hour, int16_t minute, int16_t second, int32_t offset)
	Convert a date and time (per ISO8601) to a Unix timestamp (seconds since 1970).

Data Structures