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g2_unpack4.c(3) Library Functions Manual g2_unpack4.c(3)

NAME

g2_unpack4.c - Unpack Section 4 (Product Definition Section) of a GRIB2 message.

SYNOPSIS

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

Functions


g2int g2_unpack4 (unsigned char *cgrib, g2int *iofst, g2int *ipdsnum, g2int **ipdstmpl, g2int *mappdslen, float **coordlist, g2int *numcoord)
Unpack Section 4 (Product Definition Section) of a GRIB2 message.

Detailed Description

Unpack Section 4 (Product Definition Section) of a GRIB2 message.

Author

Stephen Gilbert

Date

2002-10-31

Definition in file g2_unpack4.c.

Function Documentation

g2int g2_unpack4 (unsigned char * cgrib, g2int * iofst, g2int * ipdsnum, g2int ** ipdstmpl, g2int * mappdslen, float ** coordlist, g2int * numcoord)

Unpack Section 4 (Product Definition 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 Array containing Section 4 of the GRIB2 message.
iofst Bit offset of the beginning of Section 4 in cgrib. Returned with updated bit offset.
ipdsnum Product Definition Template Number (see Table 4.0).
ipdstmpl Pointer that gets an integer array containing the data values for the Product Definition Template specified by ipdsnum.
mappdslen Number of elements in ipdstmpl - i.e. number of entries in Product Defintion Template specified by ipdsnum.
coordlist Pointer that gets an array containing floating point values intended to document the vertical discretisation associated to model data on hybrid coordinate vertical levels.
numcoord number of values in array coordlist.

Returns

  • G2_NO_ERROR No error.
  • G2_UNPACK_BAD_SEC Array passed had incorrect section number.
  • G2_UNPACK4_BAD_PDT message contains an undefined Product Definition Template.
  • G2_UNPACK_NO_MEM Memory allocation error.

Author

Stephen Gilbert

Date

2002-10-31

Definition at line 45 of file g2_unpack4.c.

References gtemplate::ext, gtemplate::extlen, extpdstemplate(), G2_NO_ERROR, G2_UNPACK4_BAD_PDT, G2_UNPACK_BAD_SEC, G2_UNPACK_NO_MEM, gbit(), gbits(), getpdstemplate(), gtemplate::map, gtemplate::maplen, gtemplate::needext, and rdieee().

Referenced by g2_getfld().

Author

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