Grads 2.0 with grib2 files

[Jennifer Adams]

There is a bug in g2clib that causes it to fail to detect the end of  
a grib2 record if sizeof(g2int) != 4 (i.e. on 64-bit systems). You  
need the following patch to seekgb.c in g2clib:

39d38
<       int hdr;
69,70c68,69
<             k4=fread(&hdr,4,1,lugb);                //hard-coded 4  
instead of sizof(g2int)
<             if (k4 == 1 && hdr == 926365495) {      //GRIB message  
found
---
 >             k4=fread(&end,sizeof(g2int),1,lugb);
 >             if (k4 == 1 && end == 926365495) {      //GRIB message  
found

I have patched g2clib-1.0.5 and posted the new src tarball on our ftp  
server:
ftp://grads.iges.org/grads/Supplibs/2.0/src/g2clib-1.0.5.tar.gz

If implementing this patch and rebuilding the library and relinking  
with grads doesn't fix your problem, please let me know.
Jennifer




On Feb 7, 2008, at 2:40 AM, Oliver König wrote:

> On Thursday 07 February 2008 01:36:30 Jennifer Adams wrote:
>>> $ gribmap -i gfs2.ctl
>>
>> What is the output from gribmap if you use the -v option?
>> --
>> Jennifer M. Adams
>
> $ gribmap -iv gfs2.ctl
> grib2map: scanning GRIB2 file: gfs.t12z.sfluxgrbf12.grib2
> grib2map: Writing out the index file
> $ ls -l gfs.t12z.sfluxgrbf12.grib2.idx
> -rw-r--r-- 1 user users 1416 2008-02-07 08:35  
> gfs.t12z.sfluxgrbf12.grib2.idx
>
> --
> Oliver König

--
Jennifer M. Adams
IGES/COLA
4041 Powder Mill Road, Suite 302
Calverton, MD 20705
jma at cola.iges.org



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