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g2_unpack6.c(3) NCEPLIBS-g2c g2_unpack6.c(3)

NAME

g2_unpack6.c - Unpack Section 6 (Bit-Map Section) as defined in GRIB Edition 2.

SYNOPSIS

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

Functions


g2int g2_unpack6 (unsigned char *cgrib, g2int *iofst, g2int ngpts, g2int *ibmap, g2int **bmap)
This subroutine unpacks Section 6 (Bit-Map Section) as defined in GRIB Edition 2.

Detailed Description

Unpack Section 6 (Bit-Map Section) as defined in GRIB Edition 2.

Author

Stephen Gilbert

Date

2002-10-31

Definition in file g2_unpack6.c.

Function Documentation

g2int g2_unpack6 (unsigned char * cgrib, g2int * iofst, g2int ngpts, g2int * ibmap, g2int ** bmap)

This subroutine unpacks Section 6 (Bit-Map Section) as defined in GRIB Edition 2.

Parameters

cgrib char array containing Section 6 of the GRIB2 message.
iofst Bit offset of the beginning of Section 6 in cgrib.
ngpts Number of grid points specified in the bit-map
ibmap Bitmap indicator (see Code Table 6.0)
  • 0 bitmap applies and is included in Section 6.
  • 1-253 Predefined bitmap applies
  • 254 Previously defined bitmap applies to this field
  • 255 Bit map does not apply to this product.

bmap Pointer to an integer array containing decoded bitmap. (if ibmap=0)

Returns

  • 0 no error
  • 2 Not Section 6
  • 4 Unrecognized pre-defined bit-map.
  • 6 memory allocation error

Author

Stephen Gilbert

Date

2002-10-31

Definition at line 33 of file g2_unpack6.c.

References gbit(), and gbits().

Referenced by g2_getfld().

Author

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Tue May 3 2022 Version 1.6.4