units.h File Reference

Defines units used for items in the stream, most notably time units that reference an epoch and a step size. More...

Detailed Description

Defines units used for items in the stream, most notably time units that reference an epoch and a step size.

#include <stdbool.h>
#include <das2/time.h>

Go to the source code of this file.

Typedefs
typedef const char *	das_units
	Enumeration of unit types, that correspond to physical unit types. More...

Functions
das_units	Units_fromStr (const char *string)
	Basic constructor for das_unit's. More...
const char *	Units_toStr (das_units unit)
	Get the canonical string representation of a das_unit Even though das_unit is a const char*, this function should be used in case the das_unit implementation is changed in the future. More...
char *	Units_toLabel (das_units unit, char *sBuf, int nLen)
	Get label string representation das_units. More...
das_units	Units_invert (das_units unit)
	Invert the units, most commonly used for Fourier transform results. More...
das_units	Units_multiply (das_units ut1, das_units ut2)
	Combine units via multiplication. More...
das_units	Units_divide (das_units a, das_units b)
	Combine units via division. More...
das_units	Units_power (das_units unit, int power)
	Raise units to a power. More...
das_units	Units_root (das_units unit, int root)
	Reduce units to a root. More...
das_units	Units_interval (das_units unit)
	Get the unit type for intervals between data points of a given unit type. More...
das_units	Units_reduce (das_units orig, double *pFactor)
	Reduce arbitrary units to the most basic know representation. More...
bool	Units_canConvert (das_units fromUnits, das_units toUnits)
	Determine if given units are interchangeable Though not as good a solution as using UDUNITS2 works for common space physics quantities as well as SI units. More...
double	Units_convertTo (das_units toUnits, double rVal, das_units fromUnits)
	Generic unit conversion utility. More...
bool	Units_haveCalRep (das_units unit)
	Determine if the units in question can be converted to date-times. More...
void	Units_convertToDt (das_time *pDt, double value, das_units epoch_units)
	Convert a value in time offset units to a calendar representation. More...
double	Units_convertFromDt (das_units epoch_units, const das_time *pDt)
	Convert a calendar representation of a time to value in time offset units. More...
double	Units_secondsSinceMidnight (double rVal, das_units epoch_units)
	Get seconds since midnight for some value of an epoch time unit. More...
bool	Units_canMerge (das_units left, int op, das_units right)
	Determine if the units of values in a binary expression are compatable. More...