Man page - comunpack(3)
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apt-get install libg2c-dev
Manual
comunpack.c
NAMESYNOPSIS
Functions
Detailed Description
Function Documentation
int comunpack (unsigned char * cpack, g2int lensec, g2int idrsnum, g2int *idrstmpl, g2int ndpts, float * fld)
Program History Log
Author
NAME
comunpack.c - Unpack a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention.
SYNOPSIS
#include
’grib2_int.h’
#include <stdio.h>
#include <stdlib.h>
Functions
int
comunpack
(unsigned char *cpack,
g2int
lensec,
g2int
idrsnum,
g2int
*idrstmpl,
g2int
ndpts, float *fld)
Unpack a data field that was packed using a complex packing
algorithm, using info from the GRIB2 Data Representation
Template 5.2
or
Template 5.3
.
Detailed Description
Unpack a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention.
Author
Stephen Gilbert
Date
2002-10-29
Definition in file comunpack.c .
Function Documentation
int comunpack (unsigned char * cpack, g2int lensec, g2int idrsnum, g2int *idrstmpl, g2int ndpts, float * fld)
Unpack a data field that was packed using a complex packing algorithm, using info from the GRIB2 Data Representation Template 5.2 or Template 5.3 . Supports GRIB2 complex packing templates with or without spatial differences (i.e. DRTs 5.2 and 5.3).
Program History Log
Date Programmer Comments 2002-10-29 Gilbert Initial 2004-12-16 Gilbert Added test (from Arthur Taylor/MDL) verifying group widths/lengths
Parameters
cpack
pointer to the
packed data field.
lensec
length of section 7 (used for error checking).
idrsnum
Data Representation Template number. Must equal
2 or 3.
idrstmpl
pointer to the array of values for Data
Representation Template 5.2 or 5.3
ndpts
The number of data values to unpack
fld
Contains the unpacked data values. Must be allocated
with at least ndpts * sizeof(float) bytes before calling
this routine.
Returns
0 for success, error code otherwise.
Author
Stephen Gilbert
Date
2002-10-29
Definition at line 41 of file comunpack.c .
References gbit() , gbits() , int_power() , LOG , and rdieee() .
Referenced by g2c_unpack7_int() .
Author
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