.TH "g2_unpack4.c" 3 "Tue May 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
.ad l
.nh
.SH NAME
g2_unpack4.c \- Unpack Section 4 (Product Definition 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_unpack4\fP (unsigned char *cgrib, \fBg2int\fP *iofst, \fBg2int\fP *ipdsnum, \fBg2int\fP **ipdstmpl, \fBg2int\fP *mappdslen, \fBg2float\fP **coordlist, \fBg2int\fP *numcoord)"
.br
.RI "This subroutine unpacks Section 4 (Product Definition Section) as defined in GRIB Edition 2\&. "
.in -1c
.SH "Detailed Description"
.PP 
Unpack Section 4 (Product Definition 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_unpack4\&.c\fP\&.
.SH "Function Documentation"
.PP 
.SS "\fBg2int\fP g2_unpack4 (unsigned char * cgrib, \fBg2int\fP * iofst, \fBg2int\fP * ipdsnum, \fBg2int\fP ** ipdstmpl, \fBg2int\fP * mappdslen, \fBg2float\fP ** coordlist, \fBg2int\fP * numcoord)"

.PP
This subroutine unpacks Section 4 (Product Definition Section) as defined in GRIB Edition 2\&. PROGRAM HISTORY LOG:
.IP "\(bu" 2
2002-10-31 Gilbert
.IP "\(bu" 2
2009-01-14 Vuong Changed structure name template to gtemplate
.PP
.PP
\fBParameters\fP
.RS 4
\fIcgrib\fP Char array containing Section 4 of the GRIB2 message\&. 
.br
\fIiofst\fP Bit offset of the beginning of Section 4 in cgrib\&. Returned with updated bit offset\&. 
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\fIipdsnum\fP Product Definition Template Number (see Code Table 4\&.0)\&. 
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\fIipdstmpl\fP Pointer to integer array containing the data values for the specified Product Definition Template (N=ipdsnum)\&. Each element of this integer array contains an entry (in the order specified) of Product Defintion Template 4\&.N\&. 
.br
\fImappdslen\fP Number of elements in ipdstmpl\&. i\&.e\&. number of entries in Product Defintion Template 4\&.N (N=ipdsnum)\&. 
.br
\fIcoordlist\fP Pointer to real array containing floating point values intended to document the vertical discretisation associated to model data on hybrid coordinate vertical levels\&. (part of Section 4)\&. 
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\fInumcoord\fP number of values in array coordlist\&.
.RE
.PP
\fBReturns\fP
.RS 4
.IP "\(bu" 2
0 no error
.IP "\(bu" 2
2 Not section 4
.IP "\(bu" 2
5 'GRIB' message contains an undefined Product Definition Template\&.
.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 42 of file g2_unpack4\&.c\&.
.PP
References gtemplate::ext, gtemplate::extlen, extpdstemplate(), gbit(), gbits(), getpdstemplate(), gtemplate::map, gtemplate::maplen, gtemplate::needext, and rdieee()\&.
.PP
Referenced by g2_getfld()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.