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128 lines
3.1 KiB
C
128 lines
3.1 KiB
C
/**
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* @internal
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*
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* Copyright 2003, University Corporation for Atmospheric
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* Research. See netcdf-4/docs/COPYRIGHT file for copying and
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* redistribution conditions.
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*
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* This file is part of netcdf-4, a netCDF-like interface for HDF5, or a
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* HDF5 backend for netCDF, depending on your point of view.
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*
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* This file handles the (useless) *_base_pe() functions, and the
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* inq_format functions.
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*
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* @author Ed Hartnett, Dennis Heimbigner
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*/
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#include "nc4internal.h"
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#include "nc4dispatch.h"
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/**
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* @internal This function only does anything for netcdf-3 files.
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*
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* @param ncid File ID (ignored).
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* @param pe Processor element (ignored).
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*
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* @return ::NC_ENOTNC3 Not a netCDF classic format file.
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* @author Ed Hartnett
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*/
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int
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NC4_set_base_pe(int ncid, int pe)
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{
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return NC_ENOTNC3;
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}
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/**
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* @internal This function only does anything for netcdf-3 files.
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*
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* @param ncid File ID (ignored).
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* @param pe Pointer to processor element. Ignored if NULL. Gets a 0
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* if present.
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*
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* @return ::NC_ENOTNC3 Not a netCDF classic format file.
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* @author Ed Hartnett
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*/
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int
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NC4_inq_base_pe(int ncid, int *pe)
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{
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return NC_ENOTNC3;
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}
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/**
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* @internal Get the format (i.e. NC_FORMAT_NETCDF4 pr
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* NC_FORMAT_NETCDF4_CLASSIC) of an open netCDF-4 file.
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*
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* @param ncid File ID (ignored).
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* @param formatp Pointer that gets the constant indicating format.
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* @return ::NC_NOERR No error.
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* @return ::NC_EBADID Bad ncid.
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* @author Ed Hartnett
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*/
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int
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NC4_inq_format(int ncid, int *formatp)
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{
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NC *nc;
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NC_HDF5_FILE_INFO_T* nc4_info;
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LOG((2, "nc_inq_format: ncid 0x%x", ncid));
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if (!formatp)
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return NC_NOERR;
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/* Find the file metadata. */
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if (!(nc = nc4_find_nc_file(ncid,&nc4_info)))
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return NC_EBADID;
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/* Otherwise, this is a netcdf-4 file. Check if classic NC3 rules
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* are in effect for this file. */
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if (nc4_info->cmode & NC_CLASSIC_MODEL)
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*formatp = NC_FORMAT_NETCDF4_CLASSIC;
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else
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*formatp = NC_FORMAT_NETCDF4;
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return NC_NOERR;
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}
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/**
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* @internal Return the extended format (i.e. the dispatch model),
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* plus the mode associated with an open file.
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*
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* @param ncid File ID (ignored).
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* @param formatp a pointer that gets the extended format. Note that
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* this is not the same as the format provided by nc_inq_format(). The
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* extended foramt indicates the dispatch layer model. NetCDF-4 files
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* will always get NC_FORMATX_NC4 for netCDF files, NC_FORMATX_HDF4
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* for HDF4 files.
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* @param modep a pointer that gets the open/create mode associated with
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* this file. Ignored if NULL.
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* @return ::NC_NOERR No error.
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* @return ::NC_EBADID Bad ncid.
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* @author Dennis Heimbigner
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*/
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int
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NC4_inq_format_extended(int ncid, int *formatp, int *modep)
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{
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NC *nc;
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NC_HDF5_FILE_INFO_T* h5;
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LOG((2, "nc_inq_format_extended: ncid 0x%x", ncid));
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/* Find the file metadata. */
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if (!(nc = nc4_find_nc_file(ncid,&h5)))
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return NC_EBADID;
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if(modep) *modep = (nc->mode|NC_NETCDF4);
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if(formatp) {
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#ifdef USE_HDF4
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/* Distinguish HDF5 from HDF4 */
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*formatp = (h5->hdf4 ? NC_FORMATX_NC_HDF4 : NC_FORMATX_NC_HDF5);
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#else /* USE_HDF4 */
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*formatp = NC_FORMATX_NC_HDF5;
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#endif /* USE_HDF4 */
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}
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return NC_NOERR;
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}
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