dvar.c

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/* Copyright 2010-2018 University Corporation for Atmospheric
   Research/Unidata. See COPYRIGHT file for more info. */
#include "config.h"
#include "netcdf.h"
#include "netcdf_filter.h"
#include "ncdispatch.h"
#include "nc4internal.h"
#include "netcdf_f.h"
#include "nc4internal.h"
 
int
nc_def_var(int ncid, const char *name, nc_type xtype,
           int ndims,  const int *dimidsp, int *varidp)
{
    NC* ncp;
    int stat = NC_NOERR;
 
    if ((stat = NC_check_id(ncid, &ncp)))
        return stat;
    TRACE(nc_def_var);
    return ncp->dispatch->def_var(ncid, name, xtype, ndims,
                                  dimidsp, varidp);
}
 
int
nc_def_var_fill(int ncid, int varid, int no_fill, const void *fill_value)
{
    NC* ncp;
    int stat = NC_check_id(ncid,&ncp);
    if(stat != NC_NOERR) return stat;
 
    /* Using NC_GLOBAL is illegal, as this API has no provision for
     * specifying the type of the fillvalue, it must of necessity be
     * using the type of the variable to interpret the bytes of the
     * fill_value argument. */
    if (varid == NC_GLOBAL) return NC_EGLOBAL;
 
    return ncp->dispatch->def_var_fill(ncid,varid,no_fill,fill_value);
}
 
int
nc_def_var_deflate(int ncid, int varid, int shuffle, int deflate, int deflate_level)
{
    NC* ncp;
    int stat = NC_check_id(ncid,&ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->def_var_deflate(ncid,varid,shuffle,deflate,deflate_level);
}
 
int
nc_def_var_fletcher32(int ncid, int varid, int fletcher32)
{
    NC* ncp;
    int stat = NC_check_id(ncid,&ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->def_var_fletcher32(ncid,varid,fletcher32);
}
 
int
nc_def_var_chunking(int ncid, int varid, int storage, const size_t *chunksizesp)
{
    NC* ncp;
    int stat = NC_check_id(ncid, &ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->def_var_chunking(ncid, varid, storage,
                                           chunksizesp);
}
 
int
nc_def_var_endian(int ncid, int varid, int endian)
{
    NC* ncp;
    int stat = NC_check_id(ncid,&ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->def_var_endian(ncid,varid,endian);
}
 
int
nc_def_var_szip(int ncid, int varid, int options_mask, int pixels_per_block)
{
    int ret;
 
    /* This will cause H5Pset_szip to be called when the var is
     * created. */
    unsigned int params[2];
    params[0] = options_mask;
    params[1] = pixels_per_block;
    if ((ret = nc_def_var_filter(ncid, varid, HDF5_FILTER_SZIP, 2, params)))
        return ret;
 
    return NC_NOERR;
}
 
int
nc_rename_var(int ncid, int varid, const char *name)
{
    NC* ncp;
    int stat = NC_check_id(ncid, &ncp);
    if(stat != NC_NOERR) return stat;
    TRACE(nc_rename_var);
    return ncp->dispatch->rename_var(ncid, varid, name);
}
int
NC_is_recvar(int ncid, int varid, size_t* nrecs)
{
    int status = NC_NOERR;
    int unlimid;
    int ndims;
    int dimset[NC_MAX_VAR_DIMS];
 
    status = nc_inq_unlimdim(ncid,&unlimid);
    if(status != NC_NOERR) return 0; /* no unlimited defined */
    status = nc_inq_varndims(ncid,varid,&ndims);
    if(status != NC_NOERR) return 0; /* no unlimited defined */
    if(ndims == 0) return 0; /* scalar */
    status = nc_inq_vardimid(ncid,varid,dimset);
    if(status != NC_NOERR) return 0; /* no unlimited defined */
    status = nc_inq_dim(ncid,dimset[0],NULL,nrecs);
    if(status != NC_NOERR) return 0;
    return (dimset[0] == unlimid ? 1: 0);
}
 
int
NC_inq_recvar(int ncid, int varid, int* nrecdimsp, int *is_recdim)
{
    int status = NC_NOERR;
    int unlimid;
    int nvardims;
    int dimset[NC_MAX_VAR_DIMS];
    int dim;
    int nrecdims = 0;
 
    status = nc_inq_varndims(ncid,varid,&nvardims);
    if(status != NC_NOERR) return status;
    if(nvardims == 0) return NC_NOERR; /* scalars have no dims */
    for(dim = 0; dim < nvardims; dim++)
        is_recdim[dim] = 0;
    status = nc_inq_unlimdim(ncid, &unlimid);
    if(status != NC_NOERR) return status;
    if(unlimid == -1) return status; /* no unlimited dims for any variables */
#ifdef USE_NETCDF4
    {
        int nunlimdims;
        int *unlimids;
        int recdim;
        status = nc_inq_unlimdims(ncid, &nunlimdims, NULL); /* for group or file, not variable */
        if(status != NC_NOERR) return status;
        if(nunlimdims == 0) return status;
 
        if (!(unlimids = malloc(nunlimdims * sizeof(int))))
            return NC_ENOMEM;
        status = nc_inq_unlimdims(ncid, &nunlimdims, unlimids); /* for group or file, not variable */
        if(status != NC_NOERR) {
            free(unlimids);
            return status;
        }
        status = nc_inq_vardimid(ncid, varid, dimset);
        if(status != NC_NOERR) {
            free(unlimids);
            return status;
        }
        for (dim = 0; dim < nvardims; dim++) { /* netCDF-4 rec dims need not be first dim for a rec var */
            for(recdim = 0; recdim < nunlimdims; recdim++) {
                if(dimset[dim] == unlimids[recdim]) {
                    is_recdim[dim] = 1;
                    nrecdims++;
                }
            }
        }
        free(unlimids);
    }
#else
    status = nc_inq_vardimid(ncid, varid, dimset);
    if(status != NC_NOERR) return status;
    if(dimset[0] == unlimid) {
        is_recdim[0] = 1;
        nrecdims++;
    }
#endif /* USE_NETCDF4 */
    if(nrecdimsp) *nrecdimsp = nrecdims;
    return status;
}
 
/* Ok to use NC pointers because
   all IOSP's will use that structure,
   but not ok to use e.g. NC_Var pointers
   because they may be different structure
   entirely.
*/
 
int
nctypelen(nc_type type)
{
    switch(type){
    case NC_CHAR :
        return ((int)sizeof(char));
    case NC_BYTE :
        return ((int)sizeof(signed char));
    case NC_SHORT :
        return ((int)sizeof(short));
    case NC_INT :
        return ((int)sizeof(int));
    case NC_FLOAT :
        return ((int)sizeof(float));
    case NC_DOUBLE :
        return ((int)sizeof(double));
 
        /* These can occur in netcdf-3 code */
    case NC_UBYTE :
        return ((int)sizeof(unsigned char));
    case NC_USHORT :
        return ((int)(sizeof(unsigned short)));
    case NC_UINT :
        return ((int)sizeof(unsigned int));
    case NC_INT64 :
        return ((int)sizeof(signed long long));
    case NC_UINT64 :
        return ((int)sizeof(unsigned long long));
#ifdef USE_NETCDF4
    case NC_STRING :
        return ((int)sizeof(char*));
#endif /*USE_NETCDF4*/
 
    default:
        return -1;
    }
}
 
size_t
NC_atomictypelen(nc_type xtype)
{
    size_t sz = 0;
    switch(xtype) {
    case NC_NAT: sz = 0; break;
    case NC_BYTE: sz = sizeof(signed char); break;
    case NC_CHAR: sz = sizeof(char); break;
    case NC_SHORT: sz = sizeof(short); break;
    case NC_INT: sz = sizeof(int); break;
    case NC_FLOAT: sz = sizeof(float); break;
    case NC_DOUBLE: sz = sizeof(double); break;
    case NC_INT64: sz = sizeof(signed long long); break;
    case NC_UBYTE: sz = sizeof(unsigned char); break;
    case NC_USHORT: sz = sizeof(unsigned short); break;
    case NC_UINT: sz = sizeof(unsigned int); break;
    case NC_UINT64: sz = sizeof(unsigned long long); break;
#ifdef USE_NETCDF4
    case NC_STRING: sz = sizeof(char*); break;
#endif
    default: break;
    }
    return sz;
}
 
char *
NC_atomictypename(nc_type xtype)
{
    char* nm = NULL;
    switch(xtype) {
    case NC_NAT: nm = "undefined"; break;
    case NC_BYTE: nm = "byte"; break;
    case NC_CHAR: nm = "char"; break;
    case NC_SHORT: nm = "short"; break;
    case NC_INT: nm = "int"; break;
    case NC_FLOAT: nm = "float"; break;
    case NC_DOUBLE: nm = "double"; break;
    case NC_INT64: nm = "int64"; break;
    case NC_UBYTE: nm = "ubyte"; break;
    case NC_USHORT: nm = "ushort"; break;
    case NC_UINT: nm = "uint"; break;
    case NC_UINT64: nm = "uint64"; break;
#ifdef USE_NETCDF4
    case NC_STRING: nm = "string"; break;
#endif
    default: break;
    }
    return nm;
}
 
int
NC_getshape(int ncid, int varid, int ndims, size_t* shape)
{
    int dimids[NC_MAX_VAR_DIMS];
    int i;
    int status = NC_NOERR;
 
    if ((status = nc_inq_vardimid(ncid, varid, dimids)))
        return status;
    for(i = 0; i < ndims; i++)
        if ((status = nc_inq_dimlen(ncid, dimids[i], &shape[i])))
            break;
 
    return status;
}
 
int
NC_check_nulls(int ncid, int varid, const size_t *start, size_t **count,
               ptrdiff_t **stride)
{
    int varndims;
    int stat;
 
    if ((stat = nc_inq_varndims(ncid, varid, &varndims)))
        return stat;
 
    /* For non-scalar vars, start is required. */
    if (!start && varndims)
        return NC_EINVALCOORDS;
 
    /* If count is NULL, assume full extent of var. */
    if (!*count)
    {
        if (!(*count = malloc(varndims * sizeof(size_t))))
            return NC_ENOMEM;
        if ((stat = NC_getshape(ncid, varid, varndims, *count)))
        {
            free(*count);
            *count = NULL;
            return stat;
        }
    }
 
    /* If stride is NULL, do nothing, if *stride is NULL use all
     * 1s. */
    if (stride && !*stride)
    {
        int i;
 
        if (!(*stride = malloc(varndims * sizeof(ptrdiff_t))))
            return NC_ENOMEM;
        for (i = 0; i < varndims; i++)
            (*stride)[i] = 1;
    }
 
    return NC_NOERR;
}
 
int
nc_free_string(size_t len, char **data)
{
    int i;
    for (i = 0; i < len; i++)
        free(data[i]);
    return NC_NOERR;
}
int
nc_set_var_chunk_cache(int ncid, int varid, size_t size, size_t nelems,
                       float preemption)
{
    NC* ncp;
    int stat = NC_check_id(ncid, &ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->set_var_chunk_cache(ncid, varid, size,
                                              nelems, preemption);
}
 
int
nc_get_var_chunk_cache(int ncid, int varid, size_t *sizep, size_t *nelemsp,
                       float *preemptionp)
{
    NC* ncp;
    int stat = NC_check_id(ncid, &ncp);
    if(stat != NC_NOERR) return stat;
    return ncp->dispatch->get_var_chunk_cache(ncid, varid, sizep,
                                              nelemsp, preemptionp);
}