table of contents
| g2_unpack1.c(3) | Library Functions Manual | g2_unpack1.c(3) |
NAME¶
g2_unpack1.c - Unpack Section 1 (Identification Section) of a GRIB2 message.
SYNOPSIS¶
#include 'grib2_int.h'
#include <stdio.h>
#include <stdlib.h>
Functions¶
g2int g2_unpack1 (unsigned char *cgrib, g2int
*iofst, g2int **ids, g2int *idslen)
Unpacks Section 1 - Identification Section of a GRIB2 message.
Detailed Description¶
Unpack Section 1 (Identification Section) of a GRIB2 message.
Author
Date
Definition in file g2_unpack1.c.
Function Documentation¶
g2int g2_unpack1 (unsigned char * cgrib, g2int * iofst, g2int ** ids, g2int * idslen)¶
Unpacks Section 1 - Identification Section of a GRIB2 message.
Parameters
iofst Bit offset for the beginning of Section 1 in cgrib.
ids Pointer that gets an array which contians the information read from Section 1, the Identification section. This array is allocated by this function, and must be freed by caller (using g2_free()).
- ids[0] Identification of originating Centre (see Table 0).
- ids[1] Identification of originating Sub-centre (see Table C).
- ids[2] GRIB Master Tables Version Number (see Table 1.0).
- ids[3] GRIB Local Tables Version Number (see Table 1.1).
- ids[4] Significance of Reference Time (see 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 Table 1.3).
- ids[12] Type of processed data (see Table 1.4).
idslen Number of elements in ids.
Returns
- G2_NO_ERROR No error.
- G2_UNPACK_BAD_SEC Array passed is not section 1.
- G2_UNPACK_NO_MEM memory allocation error.
Author
Date
Definition at line 55 of file g2_unpack1.c.
References G2_NO_ERROR, G2_UNPACK_BAD_SEC, G2_UNPACK_NO_MEM, and gbit().
Referenced by g2_getfld().
Author¶
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