g2_unpack4.c File Reference

Unpack Section 4 (Product Definition Section) as defined in GRIB Edition 2. More...

#include <stdio.h>
#include <stdlib.h>
#include "grib2.h"

Go to the source code of this file.

Functions
g2int	g2_unpack4 (unsigned char *cgrib, g2int *iofst, g2int *ipdsnum, g2int **ipdstmpl, g2int *mappdslen, g2float **coordlist, g2int *numcoord)
	This subroutine unpacks Section 4 (Product Definition Section) as defined in GRIB Edition 2. More...

Detailed Description

Unpack Section 4 (Product Definition Section) as defined in GRIB Edition 2.

Author

Stephen Gilbert

Date

2002-10-31

Definition in file g2_unpack4.c.

Function Documentation

g2_unpack4()

g2int g2_unpack4	(	unsigned char *	cgrib,
		g2int *	iofst,
		g2int *	ipdsnum,
		g2int **	ipdstmpl,
		g2int *	mappdslen,
		g2float **	coordlist,
		g2int *	numcoord
	)

This subroutine unpacks Section 4 (Product Definition Section) as defined in GRIB Edition 2.

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

• 0 no error
• 2 Not section 4
• 5 "GRIB" message contains an undefined Product Definition Template.
• 6 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(), gbit(), gbits(), getpdstemplate(), gtemplate::map, gtemplate::maplen, gtemplate::needext, and rdieee().

Referenced by g2_getfld().