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/**
* Copyright 1981-2007 ECMWF
*
* Licensed under the GNU Lesser General Public License which
* incorporates the terms and conditions of version 3 of the GNU
* General Public License.
* See LICENSE and gpl-3.0.txt for details.
*/
/*
readgrib.c
*/
#include "bufrgrib.h"
#include "fortint.h"
#include "fileRead.h"
#include "sizeRoutines.h"
fortint readgrib(FILE * file, char * buffer, fortint * grib_prod_len)
/*
file = file pointer returned from PBOPEN
buffer = buffer big enough to hold the GRIB product
grib_prod_len = size of the buffer on input, becomes size in BYTES of
the GRIB product read. If the end-of-file is hit, the
value is returned unchanged (ie. when the function return
code is -1).
Function returns:
0 if a GRIB product has been successfully read
-1 if end-of-file is hit before a GRIB product is read
-2 if there is an error in the file-handling
(eg. if the file contains a truncated GRIB product)
-3 if the size of buffer is not sufficient for the GRIB product
*/
{
/* Read the GRIB product */
fortint length;
fortint original_len;
original_len = *grib_prod_len;
length = readprod("GRIB",buffer,&original_len,fileRead,fileSeek,
fileTell,file);
*grib_prod_len = original_len;
if ( buffer == NULL )
return ( length == -1 ? length : -3 );
else
return ( length > 0 ? 0 : length );
}
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