NAME

       g2_unpack1.c - Unpack Section 1 (Identification Section) as defined in GRIB Edition 2.

SYNOPSIS

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

   Functions
       g2int g2_unpack1 (unsigned char *cgrib, g2int *iofst, g2int **ids, g2int *idslen)
           This subroutine unpacks Section 1 (Identification Section) as defined in GRIB Edition
           2.

Detailed Description

       Unpack Section 1 (Identification Section) as defined in GRIB Edition 2.

       Author
           Stephen Gilbert

       Date
           2002-10-29

       Definition in file g2_unpack1.c.

Function Documentation

   g2int g2_unpack1 (unsigned char * cgrib, g2int * iofst, g2int ** ids, g2int * idslen)
       This subroutine unpacks Section 1 (Identification Section) as defined in GRIB Edition 2.

       Parameters
           cgrib char array containing Section 1 of the GRIB2 message.
           iofst Bit offset for the beginning of Section 1 in cgrib.
           ids address of pointer to integer array containing information read from Section 1,
           the Identification section.

           • ids[0] Identification of originating Centre (see Common Code Table C-1).

           • ids[1] Identification of originating Sub-centre.

           • ids[2] GRIB Master Tables Version Number (see Code Table 1.0).

           • ids[3] GRIB Local Tables Version Number (see Code Table 1.1).

           • ids[4] Significance of Reference Time (Code Table 1.2)

           • ids[5] Year ( 4 digits )

           • ids[6] Month

           • ids[7] Day

           • ids[8] Hour

           • ids[9] Minute

           • ids[10] Second

           • ids[11] Production status of processed data (see Code Table 1.3).

           • ids[12] Type of processed data (see Code Table 1.4).

           idslen Number of elements in ids.

       Returns

           • 0 no error

           • 2 Array passed is not section 1

           • 6 memory allocation error

       Author
           Stephen Gilbert

       Date
           2002-10-29

       Definition at line 44 of file g2_unpack1.c.

       References gbit().

       Referenced by g2_getfld().

Author

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