gf_unpack6.f File Reference

Contains subroutines unpacks Section 6 (Bit-Map Section). More...

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Functions/Subroutines
subroutine	gf_unpack6 (cgrib, lcgrib, iofst, ngpts, ibmap, bmap, ierr)
	This subroutine unpacks Section 6 (Bit-Map Section) starting at octet 6 of that Section. More...

Detailed Description

Contains subroutines unpacks Section 6 (Bit-Map Section).

Author

Stephen Gilbert

Date

2000-05-26

Definition in file gf_unpack6.f.

Function/Subroutine Documentation

gf_unpack6()

subroutine gf_unpack6	(	character(len=1), dimension(lcgrib), intent(in)	cgrib,
		integer, intent(in)	lcgrib,
		integer, intent(inout)	iofst,
		integer, intent(in)	ngpts,
		integer, intent(out)	ibmap,
		logical*1, dimension(:), pointer	bmap,
		integer, intent(out)	ierr
	)

This subroutine unpacks Section 6 (Bit-Map Section) starting at octet 6 of that Section.

PROGRAM HISTORY LOG:

• 2000-05-26 Stephen Gilbert Initial development.
• 2002-01-24 Stephen Gilbert Changed to dynamically allocate arrays and to pass pointers to those arrays through the argument list.

Parameters

[in]	cgrib	Character array that contains the GRIB2 message.
[in]	lcgrib	Length (in bytes) of GRIB message array cgrib.
[in,out]	iofst	Bit offset of the beginning/end(returned) of Section 6.
[in]	ngpts	Number of grid points specified in the bit-map.
[out]	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.
[out]	bmap	Logical*1 array containing decoded bitmap. (if ibmap=0) The dimension of this array can be obtained in advance from maxvals(7), which is returned from subroutine gribinfo.
[out]	ierr	Error return code. 0 no error. 4 Unrecognized pre-defined bit-map. 6 memory allocation error.

Author

Stephen Gilbert

Date

2000-05-26

Definition at line 37 of file gf_unpack6.f.