NAME

       g2_unpack5.c - Unpack Section 5 (Data Representation Section) of a GRIB2 message.

SYNOPSIS

       #include 'grib2_int.h'
       #include <stdio.h>
       #include <stdlib.h>

   Functions
       g2int g2_unpack5 (unsigned char *cgrib, g2int *iofst, g2int *ndpts, g2int *idrsnum, g2int **idrstmpl,
           g2int *mapdrslen)
           Unpack Section 5 (Data Representation Section) of a GRIB2 message.

Detailed Description

       Unpack Section 5 (Data Representation Section) of a GRIB2 message.

       Author
           Stephen Gilbert

       Date
           2002-10-31

       Definition in file g2_unpack5.c.

Function Documentation

   g2int g2_unpack5 (unsigned char * cgrib, g2int * iofst, g2int * ndpts, g2int * idrsnum, g2int ** idrstmpl,
       g2int * mapdrslen)
       Unpack Section 5 (Data Representation Section) of a GRIB2 message.

   Program History Log
       Date   Programmer   Comments    2002-10-31   Gilbert   Initial    2009-01-14   Vuong   Changed structure
       name template to gtemplate

       Parameters
           cgrib char array containing Section 5 of the GRIB2 message.
           iofst Bit offset for the beginning of Section 5 in cgrib. Returned with bit offset at the end of
           Section 5.
           ndpts Number of data points unpacked and returned.
           idrsnum Data Representation Template Number (see Code Table 5.0).
           idrstmpl Pointer to an integer array containing the data values for the specified Data Representation
           Template (N=idrsnum). Each element of this integer array contains an entry (in the order specified)
           of Data Representation Template 5.N.
           mapdrslen- Number of elements in idrstmpl. i.e. number of entries in Data Representation Template 5.N
           (N=idrsnum).

       Returns

           • G2_NO_ERROR No error.

           • G2_UNPACK_BAD_SEC Array passed had incorrect section number.

           • G2_UNPACK_NO_MEM Memory allocation error.

           • G2_UNPACK5_BAD_DRT 'GRIB' message contains an undefined Data Representation Template.

       Author
           Stephen Gilbert

       Date
           2002-10-31

       Definition at line 40 of file g2_unpack5.c.

       References   gtemplate::ext,   extdrstemplate(),   gtemplate::extlen,   G2_NO_ERROR,  G2_UNPACK5_BAD_DRT,
       G2_UNPACK_BAD_SEC, G2_UNPACK_NO_MEM, gbit(),  getdrstemplate(),  gtemplate::map,  gtemplate::maplen,  and
       gtemplate::needext.

       Referenced by g2_getfld().

Author

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NCEPLIBS-g2c                                      Version 2.1.0                                  g2_unpack5.c(3)