.TH "g2_unpack6.c" 3 "Fri Jun 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
.ad l
.nh
.SH NAME
g2_unpack6.c \- Unpack Section 6 (Bit-Map Section) as defined in GRIB Edition 2\&.  

.SH SYNOPSIS
.br
.PP
\fC#include <stdio\&.h>\fP
.br
\fC#include <stdlib\&.h>\fP
.br
\fC#include 'grib2\&.h'\fP
.br

.SS "Functions"

.in +1c
.ti -1c
.RI "\fBg2int\fP \fBg2_unpack6\fP (unsigned char *cgrib, \fBg2int\fP *iofst, \fBg2int\fP ngpts, \fBg2int\fP *ibmap, \fBg2int\fP **bmap)"
.br
.RI "This subroutine unpacks Section 6 (Bit-Map Section) as defined in GRIB Edition 2\&. "
.in -1c
.SH "Detailed Description"
.PP 
Unpack Section 6 (Bit-Map Section) as defined in GRIB Edition 2\&. 


.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2002-10-31 
.RE
.PP

.PP
Definition in file \fBg2_unpack6\&.c\fP\&.
.SH "Function Documentation"
.PP 
.SS "\fBg2int\fP g2_unpack6 (unsigned char * cgrib, \fBg2int\fP * iofst, \fBg2int\fP ngpts, \fBg2int\fP * ibmap, \fBg2int\fP ** bmap)"

.PP
This subroutine unpacks Section 6 (Bit-Map Section) as defined in GRIB Edition 2\&. 
.PP
\fBParameters\fP
.RS 4
\fIcgrib\fP char array containing Section 6 of the GRIB2 message\&. 
.br
\fIiofst\fP Bit offset of the beginning of Section 6 in cgrib\&. 
.br
\fIngpts\fP Number of grid points specified in the bit-map 
.br
\fIibmap\fP Bitmap indicator (see Code Table 6\&.0)
.IP "\(bu" 2
0 bitmap applies and is included in Section 6\&.
.IP "\(bu" 2
1-253 Predefined bitmap applies
.IP "\(bu" 2
254 Previously defined bitmap applies to this field
.IP "\(bu" 2
255 Bit map does not apply to this product\&. 
.PP
.br
\fIbmap\fP Pointer to an integer array containing decoded bitmap\&. (if ibmap=0)
.RE
.PP
\fBReturns\fP
.RS 4
.IP "\(bu" 2
0 no error
.IP "\(bu" 2
2 Not Section 6
.IP "\(bu" 2
4 Unrecognized pre-defined bit-map\&.
.IP "\(bu" 2
6 memory allocation error
.PP
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2002-10-31 
.RE
.PP

.PP
Definition at line 33 of file g2_unpack6\&.c\&.
.PP
References gbit(), and gbits()\&.
.PP
Referenced by g2_getfld()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.