.TH "comunpack.c" 3 "Tue May 3 2022" "Version 1.6.4" "NCEPLIBS-g2c" \" -*- nroff -*-
.ad l
.nh
.SH NAME
comunpack.c \- Unpack a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention\&.  

.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 "int \fBcomunpack\fP (unsigned char *cpack, \fBg2int\fP lensec, \fBg2int\fP idrsnum, \fBg2int\fP *idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP *fld)"
.br
.RI "This subroutine unpacks a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention, using info from the GRIB2 Data Representation Template 5\&.2 or 5\&.3\&. "
.in -1c
.SH "Detailed Description"
.PP 
Unpack a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention\&. 


.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2002-10-29 
.RE
.PP

.PP
Definition in file \fBcomunpack\&.c\fP\&.
.SH "Function Documentation"
.PP 
.SS "int comunpack (unsigned char * cpack, \fBg2int\fP lensec, \fBg2int\fP idrsnum, \fBg2int\fP * idrstmpl, \fBg2int\fP ndpts, \fBg2float\fP * fld)"

.PP
This subroutine unpacks a data field that was packed using a complex packing algorithm as defined in the GRIB2 documention, using info from the GRIB2 Data Representation Template 5\&.2 or 5\&.3\&. Supports GRIB2 complex packing templates with or without spatial differences (i\&.e\&. DRTs 5\&.2 and 5\&.3)\&.
.PP
PROGRAM HISTORY LOG:
.IP "\(bu" 2
2002-10-29 Gilbert
.IP "\(bu" 2
2004-12-16 Gilbert Added test (provided by Arthur Taylor/MDL) to verify that group widths and lengths are consistent with section length\&.
.PP
.PP
\fBParameters\fP
.RS 4
\fIcpack\fP pointer to the packed data field\&. 
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\fIlensec\fP length of section 7 (used for error checking)\&. 
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\fIidrsnum\fP Data Representation Template number 5\&.N Must equal 2 or 3\&. 
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\fIidrstmpl\fP pointer to the array of values for Data Representation Template 5\&.2 or 5\&.3 
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\fIndpts\fP The number of data values to unpack 
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\fIfld\fP Contains the unpacked data values\&. fld must be allocated with at least ndpts*sizeof(g2float) bytes before calling this routine\&.
.RE
.PP
\fBReturns\fP
.RS 4
0 for success, error code otherwise\&.
.RE
.PP
\fBAuthor\fP
.RS 4
Stephen Gilbert 
.RE
.PP
\fBDate\fP
.RS 4
2002-10-29 
.RE
.PP

.PP
Definition at line 39 of file comunpack\&.c\&.
.PP
References gbit(), gbits(), int_power(), and rdieee()\&.
.PP
Referenced by g2_unpack7()\&.
.SH "Author"
.PP 
Generated automatically by Doxygen for NCEPLIBS-g2c from the source code\&.