g2_unpack5.c File Reference

Unpack Section 5 (Data Representation Section) as defined in GRIB Edition 2. More...

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

Go to the source code of this file.

Functions
g2int	g2_unpack5 (unsigned char *cgrib, g2int *iofst, g2int *ndpts, g2int *idrsnum, g2int **idrstmpl, g2int *mapdrslen)
	This subroutine unpacks Section 5 (Data Representation Section) as defined in GRIB Edition 2. More...

Detailed Description

Unpack Section 5 (Data Representation Section) as defined in GRIB Edition 2.

Author

Stephen Gilbert

Date

2002-10-31

Definition in file g2_unpack5.c.

Function Documentation

g2_unpack5()

g2int g2_unpack5	(	unsigned char *	cgrib,
		g2int *	iofst,
		g2int *	ndpts,
		g2int *	idrsnum,
		g2int **	idrstmpl,
		g2int *	mapdrslen
	)

This subroutine unpacks Section 5 (Data Representation 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	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 42 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().