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

       Generated automatically by Doxygen for NCEPLIBS-g2c from the source code.

NCEPLIBS-g2c                                      Version 2.1.0                                   comunpack.c(3)