compack.c File Reference

Pack up a data field using a complex packing algorithm as defined in the GRIB2 documention. More...

#include <stdlib.h>
#include <math.h>
#include "grib2_int.h"

Go to the source code of this file.

Functions
void	compack (float *fld, g2int ndpts, g2int idrsnum, g2int *idrstmpl, unsigned char *cpack, g2int *lcpack)
	This subroutine packs up a data field using a complex packing algorithm as defined in the GRIB2 documention. More...

Detailed Description

Pack up a data field using a complex packing algorithm as defined in the GRIB2 documention.

Author

Stephen Gilbert

Date

2002-11-07

Definition in file compack.c.

Function Documentation

compack()

void compack	(	float *	fld,
		g2int	ndpts,
		g2int	idrsnum,
		g2int *	idrstmpl,
		unsigned char *	cpack,
		g2int *	lcpack
	)

This subroutine packs up a data field using a complex packing algorithm as defined in the GRIB2 documention.

It supports GRIB2 complex packing templates with or without spatial differences (i.e. DRTs 5.2 and 5.3). It also fills in GRIB2 Data Representation Template 5.2 or Template 5.3 with the appropriate values.

Parameters

fld	Contains the data values to pack.
ndpts	The number of data values in array fld.
idrsnum	Data Representation Template number. Must equal 2 or 3.
idrstmpl	Contains the array of values for Data Representation Template 5.2 or 5.3. 0 Reference value - ignored on input, set my compack(). 1 Binary Scale Factor 2 Decimal Scale Factor 6 Missing value management 7 Primary missing value 8 Secondary missing value 16 Order of Spatial Differencing (1 or 2)
cpack	The packed data field.
lcpack	length of packed field cpack.

Author

Stephen Gilbert

Date

2002-11-07

Definition at line 42 of file compack.c.

References ALOG2, int_power(), mkieee(), pack_gp(), sbit(), and sbits().

Referenced by cmplxpack().