6.9 Learn About Fletcher32 Parameters for a Variable: NF_INQ_VAR_FLETCHER32
The function NF_INQ_VAR_FLETCHER32 returns the fletcher32 settings for a
variable in a netCDF-4 file.
Usage
NF_INQ_VAR_FLETCHER32(INTEGER NCID, INTEGER VARID, INTEGER FLETCHER32);
NCID- NetCDF ID, from a previous call to NF_OPEN or NF_CREATE.
VARID- Variable ID.
FLETCHER32- NF_INQ_VAR_FLETCHER32 will set this to 1 if the fletcher32 filter is
turned on for this variable, and 0 if it is not.
Errors
NF_INQ_VAR_FLETCHER32 returns the value NF_NOERR if no errors
occurred. Otherwise, the returned status indicates an error.
Possible return codes include:
NF_NOERR- No error.
NF_BADID- Bad ncid.
NF_ENOTNC4- Not a netCDF-4 file.
NF_ENOTVAR- Can't find this variable.
Example
In this example from nf_test/ftst_vars.F the fletcher32 filter is
checked for a file. Since it was turned on for this variable, the
fletcher32 variable is set to 1.
retval = nf_inq_var_fletcher32(ncid, varid, fletcher32)
if (retval .ne. nf_noerr) call handle_err(retval)
if (fletcher32 .ne. 1) stop 2
