netcdf-c/libsrcp/ncpdispatch.c

/*********************************************************************
 *   Copyright 2018, UCAR/Unidata
 *   See netcdf/COPYRIGHT file for copying and redistribution conditions.
 *********************************************************************/

/* WARNING: Order of mpi.h, nc.h, and pnetcdf.h is important */
#include "config.h"
#include <stdlib.h>
#include <mpi.h>
#include "nc.h"
#include "ncdispatch.h"
#include "fbits.h"

/* Must follow netcdf.h */
#include <pnetcdf.h>

#define NCP_MODE_DATA  0x0001
#define NCP_MODE_INDEP 0x0002

typedef struct NCP_INFO
{
   /* pnetcdf_access_mode keeps track of whether independent or collective
    * mode is set currently and whether the file is in define or data mode.
    */
   int pnetcdf_access_mode;
} NCP_INFO;

/* Define accessors for the dispatchdata */
#define NCP_DATA(nc) ((NCP_INFO*)(nc)->dispatchdata)
#define NCP_DATA_SET(nc,data) ((nc)->dispatchdata = (void*)(data))

/* NC_MPIIO and NC_MPIPOSIX are deprecated and hence ignored */
static const int LEGAL_CREATE_FLAGS = (NC_WRITE | NC_NOCLOBBER | NC_64BIT_OFFSET | NC_CLASSIC_MODEL | NC_SHARE | NC_LOCK | NC_64BIT_DATA | NC_MPIIO | NC_MPIPOSIX);

static const int LEGAL_OPEN_FLAGS = (NC_WRITE | NC_NOCLOBBER | NC_SHARE | NC_LOCK | NC_CLASSIC_MODEL | NC_64BIT_OFFSET | NC_64BIT_DATA | NC_MPIIO | NC_MPIPOSIX);


/**************************************************/

static int
NCP_create(const char *path,
           int cmode,
           size_t initialsz,
           int basepe,
           size_t *chunksizehintp,
           void *mpidata,
           const struct NC_Dispatch *table,
           int ncid)
{
    int status;
    NCP_INFO *nc5;
    NC *nc;

    /* Find pointer to NC for this file. */
    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    /* Check the cmode for only valid flags */
    if (cmode & ~LEGAL_CREATE_FLAGS) return NC_EINVAL;

    /* No MPI environment initialized */
    if (mpidata == NULL) return NC_ENOPAR;

    /* Create NCP_INFO instance */
    nc5 = (NCP_INFO*)calloc(1,sizeof(NCP_INFO));
    if (nc5 == NULL) return NC_ENOMEM;

    /* Link nc5 and nc */
    NCP_DATA_SET(nc,nc5);

    status = ncmpi_create(((NC_MPI_INFO *)mpidata)->comm, path, cmode,
                          ((NC_MPI_INFO *)mpidata)->info, &nc->int_ncid);

    if (status == NC_NOERR)
        /* Default to independent access, like netCDF-4/HDF5 files. */
        fSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
    else
        free(nc5); /* reclaim allocated space */

    return status;
}

static int
NCP_open(const char *path,
         int omode,
         int basepe,
         size_t *chunksizehintp,
         void *mpidata,
         const struct NC_Dispatch *table,
         int ncid)
{
    int status;
    NCP_INFO *nc5;
    NC *nc;

    /* Find pointer to NC for this file. */
    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    /* Check the omode for only valid flags */
    if (omode & ~LEGAL_OPEN_FLAGS) return NC_EINVAL;

    /* No MPI environment initialized */
    if (mpidata == NULL) return NC_ENOPAR;

    /* Create NCP_INFO instance */
    nc5 = (NCP_INFO*)calloc(1,sizeof(NCP_INFO));
    if (nc5 == NULL) return NC_ENOMEM;

    /* file open automatically enters data mode */
    fSet(nc5->pnetcdf_access_mode, NCP_MODE_DATA);

    /* Link nc5 and nc */
    NCP_DATA_SET(nc,nc5);

    status = ncmpi_open(((NC_MPI_INFO *)mpidata)->comm, path, omode,
                        ((NC_MPI_INFO *)mpidata)->info, &(nc->int_ncid));

    if (status == NC_NOERR) {
        /* Default to independent access, like netCDF-4/HDF5 files. */
        status = ncmpi_begin_indep_data(nc->int_ncid);
        fSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
    }
    else
        free(nc5); /* reclaim allocated space */

    return status;
}

static int
NCP_redef(int ncid)
{
    NC *nc;
    NCP_INFO *nc5;

    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);

    /* the file now enters define mode */
    fClr(nc5->pnetcdf_access_mode, NCP_MODE_DATA);

    return ncmpi_redef(nc->int_ncid);
}

static int
NCP__enddef(int ncid,
            size_t h_minfree,
            size_t v_align,
            size_t v_minfree,
            size_t r_align)
{
    int status;
    NC *nc;
    NCP_INFO *nc5;

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

#if (PNETCDF_VERSION_MAJOR*10000 + PNETCDF_VERSION_MINOR*100 + PNETCDF_VERSION_SUB >= 10500)
    /* ncmpi__enddef() was first implemented in PnetCDF v1.5.0 */
    status = ncmpi__enddef(nc->int_ncid,
                           (MPI_Offset)h_minfree,
                           (MPI_Offset)v_align,
                           (MPI_Offset)v_minfree,
                           (MPI_Offset)r_align);
#else
    status = ncmpi_enddef(nc->int_ncid);
#endif

    if (!status) {
        /* the file now enters data mode */
        fSet(nc5->pnetcdf_access_mode, NCP_MODE_DATA);
        /* default is independent data mode */
        if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP))
            status = ncmpi_begin_indep_data(nc->int_ncid);
    }
    return status;
}

static int
NCP_sync(int ncid)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_sync(nc->int_ncid);
}

static int
NCP_abort(int ncid)
{
    NC *nc;
    NCP_INFO *nc5;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    status = ncmpi_abort(nc->int_ncid);

    nc5 = NCP_DATA(nc);
    if (nc5 != NULL) free(nc5); /* reclaim allocated space */

    return status;
}


static int
NCP_close(int ncid, void *ignored)
{
    NC *nc;
    NCP_INFO *nc5;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    status = ncmpi_close(nc->int_ncid);

    nc5 = NCP_DATA(nc);
    if (nc5 != NULL) free(nc5); /* reclaim allocated space */

    return status;
}

static int
NCP_set_fill(int ncid, int fillmode, int *old_mode_ptr)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
#if (PNETCDF_VERSION_MAJOR*10000 + PNETCDF_VERSION_MINOR*100 + PNETCDF_VERSION_SUB >= 10601)
    /* ncmpi_set_fill was first implemented in PnetCDF 1.6.1 */
    return ncmpi_set_fill(nc->int_ncid, fillmode, old_mode_ptr);
#else
    return NC_EPNETCDF;
#endif
}

static int
NCP_inq_format(int ncid, int *formatp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_format(nc->int_ncid, formatp);
}

static int
NCP_inq_format_extended(int ncid, int *formatp, int *modep)
{
    /* Note PnetCDF understands classic, 64bit-offset, and CDF-5 formats */
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    if (modep) *modep = nc->mode;
    if (formatp) *formatp = NC_FORMATX_PNETCDF;
    return NC_NOERR;
}

static int
NCP_inq(int ncid,
        int *ndimsp,
        int *nvarsp,
        int *nattsp,
        int *unlimp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq(nc->int_ncid, ndimsp, nvarsp, nattsp, unlimp);
}

static int
NCP_inq_type(int ncid, nc_type typeid, char *name, size_t *size)
{
    /* for non-netcdf4 files, no user defined type is allowed */
    if (typeid < NC_BYTE || typeid >= NC_STRING)
        return NC_EBADTYPE;
    if (name)
        strcpy(name, NC_atomictypename(typeid));
    if (size)
        *size = NC_atomictypelen(typeid);
    return NC_NOERR;
}

static int
NCP_def_dim(int ncid, const char *name, size_t len, int *idp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_def_dim(nc->int_ncid, name, len, idp);
}

static int
NCP_inq_dimid(int ncid, const char *name, int *idp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_dimid(nc->int_ncid, name, idp);
}

static int
NCP_inq_dim(int ncid, int dimid, char *name, size_t *lenp)
{
    int status;
    NC *nc;
    MPI_Offset mpilen;
    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    status = ncmpi_inq_dim(nc->int_ncid, dimid, name, &mpilen);
    if (status == NC_NOERR && lenp) *lenp = mpilen;
    return status;
}

static int
NCP_inq_unlimdim(int ncid,  int *unlimdimidp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_unlimdim(nc->int_ncid, unlimdimidp);
}

static int
NCP_rename_dim(int ncid, int dimid, const char *newname)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_rename_dim(nc->int_ncid, dimid, newname);
}

static int
NCP_inq_att(int ncid,
            int varid,
            const char *name,
            nc_type *xtypep,
            size_t *lenp)
{
    NC *nc;
    MPI_Offset mpilen;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    status = ncmpi_inq_att(nc->int_ncid, varid, name, xtypep, &mpilen);
    if (status == NC_NOERR && lenp) *lenp = mpilen;
    return status;
}

static int
NCP_inq_attid(int ncid, int varid, const char *name, int *idp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_attid(nc->int_ncid,varid, name, idp);
}

static int
NCP_inq_attname(int ncid, int varid, int attnum, char *name)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_attname(nc->int_ncid, varid, attnum, name);
}

static int
NCP_rename_att(int ncid, int varid, const char *name,
               const char *newname)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_rename_att(nc->int_ncid, varid, name, newname);
}

static int
NCP_del_att(int ncid, int varid, const char *name)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_del_att(nc->int_ncid, varid, name);
}

static int
NCP_get_att(int ncid,
            int varid,
            const char *name,
            void *op,
            nc_type memtype)
{
    NC *nc;
    int status;

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    if (memtype == NC_NAT) {
        status = ncmpi_inq_att(nc->int_ncid, varid, name, &memtype, NULL);
        if (status != NC_NOERR) return status;
    }

    switch (memtype) {
        case NC_CHAR:
            return ncmpi_get_att_text(nc->int_ncid, varid, name, (char*)op);
        case NC_BYTE:
            return ncmpi_get_att_schar(nc->int_ncid, varid, name, (signed char*)op);
        case NC_SHORT:
            return ncmpi_get_att_short(nc->int_ncid, varid, name, (short*)op);
        case NC_INT:
            return ncmpi_get_att_int(nc->int_ncid, varid, name, (int*)op);
        case NC_FLOAT:
            return ncmpi_get_att_float(nc->int_ncid, varid, name, (float*)op);
        case NC_DOUBLE:
            return ncmpi_get_att_double(nc->int_ncid, varid, name, (double*)op);
        case NC_UBYTE:
            return ncmpi_get_att_uchar(nc->int_ncid, varid, name, (unsigned char*)op);
        case NC_USHORT:
            return ncmpi_get_att_ushort(nc->int_ncid, varid, name, (unsigned short*)op);
        case NC_UINT:
            return ncmpi_get_att_uint(nc->int_ncid, varid, name, (unsigned int*)op);
        case NC_INT64:
            return ncmpi_get_att_longlong(nc->int_ncid, varid, name, (long long*)op);
        case NC_UINT64:
            return ncmpi_get_att_ulonglong(nc->int_ncid, varid, name, (unsigned long long*)op);
        default:
            return NC_EBADTYPE;
    }
}

static int
NCP_put_att(int ncid,
            int varid,
            const char *name,
            nc_type xtype,
            size_t len,
            const void *ip,
            nc_type memtype)
{
    NC *nc;
    int status;
    MPI_Offset mpilen;

    /* check if ncid is valid */
    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    /* check if varid is valid */
    status = ncmpi_inq_varnatts(nc->int_ncid, varid, NULL);
    if (status != NC_NOERR) return status;

    if (!name || (strlen(name) > NC_MAX_NAME))
        return NC_EBADNAME;

    /* The length needs to be positive (cast needed for braindead
       systems with signed size_t). */
    if (((unsigned long) len) > X_INT_MAX)
        return NC_EINVAL;

    mpilen = len;

    switch (memtype) {
        case NC_CHAR:
            return ncmpi_put_att_text(nc->int_ncid, varid, name, mpilen, (char*)ip);
        case NC_BYTE:
            return ncmpi_put_att_schar(nc->int_ncid, varid, name, xtype, mpilen, (signed char*)ip);
        case NC_SHORT:
            return ncmpi_put_att_short(nc->int_ncid, varid, name, xtype, mpilen, (short*)ip);
        case NC_INT:
            return ncmpi_put_att_int(nc->int_ncid, varid, name, xtype, mpilen, (int*)ip);
        case NC_FLOAT:
            return ncmpi_put_att_float(nc->int_ncid, varid, name, xtype, mpilen, (float*)ip);
        case NC_DOUBLE:
            return ncmpi_put_att_double(nc->int_ncid, varid, name, xtype, mpilen, (double*)ip);
        case NC_UBYTE:
            return ncmpi_put_att_uchar(nc->int_ncid, varid, name, xtype, mpilen, (unsigned char*)ip);
        case NC_USHORT:
            return ncmpi_put_att_ushort(nc->int_ncid, varid, name, xtype, mpilen, (unsigned short*)ip);
        case NC_UINT:
            return ncmpi_put_att_uint(nc->int_ncid, varid, name, xtype, mpilen, (unsigned int*)ip);
        case NC_INT64:
            return ncmpi_put_att_longlong(nc->int_ncid, varid, name, xtype, mpilen, (long long*)ip);
        case NC_UINT64:
            return ncmpi_put_att_ulonglong(nc->int_ncid, varid, name, xtype, mpilen, (unsigned long long*)ip);
        default:
            return NC_EBADTYPE;
    }
}

static int
NCP_def_var(int ncid, const char *name, nc_type xtype,
            int ndims, const int *dimidsp, int *varidp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_def_var(nc->int_ncid,name,xtype,ndims,dimidsp,varidp);
}

static int
NCP_inq_varid(int ncid, const char *name, int *varidp)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_inq_varid(nc->int_ncid,name,varidp);
}

static int
NCP_rename_var(int ncid, int varid, const char *name)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
    return ncmpi_rename_var(nc->int_ncid,varid,name);
}

static int
NCP_get_vara(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             void *op,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS];

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start and count arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d] = startp[d];
        mpi_count[d] = countp[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_vara_schar(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_CHAR:
                return ncmpi_get_vara_text(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_SHORT:
                return ncmpi_get_vara_short(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_INT:
                return ncmpi_get_vara_int(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_FLOAT:
                return ncmpi_get_vara_float(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_DOUBLE:
                return ncmpi_get_vara_double(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UBYTE:
                return ncmpi_get_vara_uchar(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_USHORT:
                return ncmpi_get_vara_ushort(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UINT:
                return ncmpi_get_vara_uint(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_INT64:
                return ncmpi_get_vara_longlong(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UINT64:
                return ncmpi_get_vara_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, op);
            default:
                return NC_EBADTYPE;
        }
    } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_vara_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_CHAR:
                return ncmpi_get_vara_text_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_SHORT:
                return ncmpi_get_vara_short_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_INT:
                return ncmpi_get_vara_int_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_FLOAT:
                return ncmpi_get_vara_float_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_DOUBLE:
                return ncmpi_get_vara_double_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UBYTE:
                return ncmpi_get_vara_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_USHORT:
                return ncmpi_get_vara_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UINT:
                return ncmpi_get_vara_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_INT64:
                return ncmpi_get_vara_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            case NC_UINT64:
                return ncmpi_get_vara_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, op);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_put_vara(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             const void *ip,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS];

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start and count arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d] = startp[d];
        mpi_count[d] = countp[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_vara_schar(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_CHAR:
                return ncmpi_put_vara_text(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_SHORT:
                return ncmpi_put_vara_short(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_INT:
                return ncmpi_put_vara_int(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_FLOAT:
                return ncmpi_put_vara_float(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_DOUBLE:
                return ncmpi_put_vara_double(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UBYTE:
                return ncmpi_put_vara_uchar(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_USHORT:
                return ncmpi_put_vara_ushort(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UINT:
                return ncmpi_put_vara_uint(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_INT64:
                return ncmpi_put_vara_longlong(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UINT64:
                return ncmpi_put_vara_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            default:
                return NC_EBADTYPE;
        }
    } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_vara_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_CHAR:
                return ncmpi_put_vara_text_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_SHORT:
                return ncmpi_put_vara_short_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_INT:
                return ncmpi_put_vara_int_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_FLOAT:
                return ncmpi_put_vara_float_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_DOUBLE:
                return ncmpi_put_vara_double_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UBYTE:
                return ncmpi_put_vara_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_USHORT:
                return ncmpi_put_vara_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UINT:
                return ncmpi_put_vara_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_INT64:
                return ncmpi_put_vara_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            case NC_UINT64:
                return ncmpi_put_vara_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, ip);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_get_vars(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             const ptrdiff_t *stridep,
             void *op,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS], mpi_stride[NC_MAX_VAR_DIMS];

    if (stridep == NULL)
        return NCP_get_vara(ncid, varid, startp, countp, op, memtype);

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start, count, and stride arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d] = startp[d];
        mpi_count[d] = countp[d];
        mpi_stride[d] = stridep[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_vars_schar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_CHAR:
                return ncmpi_get_vars_text(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_SHORT:
                return ncmpi_get_vars_short(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT:
                return ncmpi_get_vars_int(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_FLOAT:
                return ncmpi_get_vars_float(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_DOUBLE:
                return ncmpi_get_vars_double(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UBYTE:
                return ncmpi_get_vars_uchar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_USHORT:
                return ncmpi_get_vars_ushort(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT:
                return ncmpi_get_vars_uint(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT64:
                return ncmpi_get_vars_longlong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT64:
                return ncmpi_get_vars_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            default:
                return NC_EBADTYPE;
        }
    } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_vars_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_CHAR:
                return ncmpi_get_vars_text_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_SHORT:
                return ncmpi_get_vars_short_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT:
                return ncmpi_get_vars_int_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_FLOAT:
                return ncmpi_get_vars_float_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_DOUBLE:
                return ncmpi_get_vars_double_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UBYTE:
                return ncmpi_get_vars_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_USHORT:
                return ncmpi_get_vars_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT:
                return ncmpi_get_vars_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT64:
                return ncmpi_get_vars_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT64:
                return ncmpi_get_vars_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_put_vars(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             const ptrdiff_t *stridep,
             const void *op,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS], mpi_stride[NC_MAX_VAR_DIMS];

    if (stridep == NULL)
        return NCP_put_vara(ncid, varid, startp, countp, op, memtype);

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start, count, and stride arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d] = startp[d];
        mpi_count[d] = countp[d];
        mpi_stride[d] = stridep[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_vars_schar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_CHAR:
                return ncmpi_put_vars_text(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_SHORT:
                return ncmpi_put_vars_short(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT:
                return ncmpi_put_vars_int(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_FLOAT:
                return ncmpi_put_vars_float(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_DOUBLE:
                return ncmpi_put_vars_double(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UBYTE:
                return ncmpi_put_vars_uchar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_USHORT:
                return ncmpi_put_vars_ushort(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT:
                return ncmpi_put_vars_uint(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT64:
                return ncmpi_put_vars_longlong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT64:
                return ncmpi_put_vars_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            default:
                return NC_EBADTYPE;
        }
    } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_vars_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_CHAR:
                return ncmpi_put_vars_text_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_SHORT:
                return ncmpi_put_vars_short_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT:
                return ncmpi_put_vars_int_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_FLOAT:
                return ncmpi_put_vars_float_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_DOUBLE:
                return ncmpi_put_vars_double_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UBYTE:
                return ncmpi_put_vars_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_USHORT:
                return ncmpi_put_vars_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT:
                return ncmpi_put_vars_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_INT64:
                return ncmpi_put_vars_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            case NC_UINT64:
                return ncmpi_put_vars_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, op);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_get_varm(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             const ptrdiff_t *stridep,
             const ptrdiff_t *imapp,
             void *ip,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS], mpi_stride[NC_MAX_VAR_DIMS], mpi_imap[NC_MAX_VAR_DIMS];

    if (imapp == NULL) {
        if (stridep == NULL)
            return NCP_get_vara(ncid, varid, startp, countp, ip, memtype);
        else
            return NCP_get_vars(ncid, varid, startp, countp, stridep, ip, memtype);
    }

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start, count, stride, and imap arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d]  = startp[d];
        mpi_count[d]  = countp[d];
        mpi_stride[d] = (stridep == NULL) ? 1 : stridep[d];
        mpi_imap[d]   = imapp[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_varm_schar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_CHAR:
                return ncmpi_get_varm_text(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_SHORT:
                return ncmpi_get_varm_short(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_INT:
                return ncmpi_get_varm_int(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_FLOAT:
                return ncmpi_get_varm_float(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_DOUBLE:
                return ncmpi_get_varm_double(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UBYTE:
                return ncmpi_get_varm_uchar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_USHORT:
                return ncmpi_get_varm_ushort(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UINT:
                return ncmpi_get_varm_uint(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_INT64:
                return ncmpi_get_varm_longlong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UINT64:
                return ncmpi_get_varm_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            default:
                return NC_EBADTYPE;
        }
      } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_get_varm_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_CHAR:
                return ncmpi_get_varm_text_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_SHORT:
                return ncmpi_get_varm_short_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_INT:
                return ncmpi_get_varm_int_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_FLOAT:
                return ncmpi_get_varm_float_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_DOUBLE:
                return ncmpi_get_varm_double_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UBYTE:
                return ncmpi_get_varm_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_USHORT:
                return ncmpi_get_varm_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UINT:
                return ncmpi_get_varm_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_INT64:
                return ncmpi_get_varm_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            case NC_UINT64:
                return ncmpi_get_varm_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, ip);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_put_varm(int ncid,
             int varid,
             const size_t *startp,
             const size_t *countp,
             const ptrdiff_t *stridep,
             const ptrdiff_t *imapp,
             const void *op,
             nc_type memtype)
{
    NC *nc;
    NCP_INFO *nc5;
    int d, ndims, status;
    MPI_Offset mpi_start[NC_MAX_VAR_DIMS], mpi_count[NC_MAX_VAR_DIMS], mpi_stride[NC_MAX_VAR_DIMS], mpi_imap[NC_MAX_VAR_DIMS];

    if (imapp == NULL) {
        if (stridep == NULL)
            return NCP_put_vara(ncid, varid, startp, countp, op, memtype);
        else
            return NCP_put_vars(ncid, varid, startp, countp, stridep, op, memtype);
    }

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* get variable's ndims */
    status = ncmpi_inq_varndims(nc->int_ncid, varid, &ndims);
    if (status != NC_NOERR) return status;

    /* We must convert the start, count, stride, and imap arrays to MPI_Offset type. */
    for (d=0; d<ndims; d++) {
        mpi_start[d]  = startp[d];
        mpi_count[d]  = countp[d];
        mpi_stride[d] = (stridep == NULL) ? 1 : stridep[d];
        mpi_imap[d]   = imapp[d];
    }

    if (memtype == NC_NAT) {
        status = ncmpi_inq_vartype(nc->int_ncid, varid, &memtype);
        if (status != NC_NOERR) return status;
    }

    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_varm_schar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_CHAR:
                return ncmpi_put_varm_text(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_SHORT:
                return ncmpi_put_varm_short(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_INT:
                return ncmpi_put_varm_int(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_FLOAT:
                return ncmpi_put_varm_float(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_DOUBLE:
                return ncmpi_put_varm_double(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UBYTE:
                return ncmpi_put_varm_uchar(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_USHORT:
                return ncmpi_put_varm_ushort(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UINT:
                return ncmpi_put_varm_uint(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_INT64:
                return ncmpi_put_varm_longlong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UINT64:
                return ncmpi_put_varm_ulonglong(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            default:
                return NC_EBADTYPE;
        }
    } else {
        switch(memtype) {
            case NC_BYTE:
                return ncmpi_put_varm_schar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_CHAR:
                return ncmpi_put_varm_text_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_SHORT:
                return ncmpi_put_varm_short_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_INT:
                return ncmpi_put_varm_int_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_FLOAT:
                return ncmpi_put_varm_float_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_DOUBLE:
                return ncmpi_put_varm_double_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UBYTE:
                return ncmpi_put_varm_uchar_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_USHORT:
                return ncmpi_put_varm_ushort_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UINT:
                return ncmpi_put_varm_uint_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_INT64:
                return ncmpi_put_varm_longlong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            case NC_UINT64:
                return ncmpi_put_varm_ulonglong_all(nc->int_ncid, varid, mpi_start, mpi_count, mpi_stride, mpi_imap, op);
            default:
                return NC_EBADTYPE;
        }
    }
}

static int
NCP_inq_var_all(int ncid, int varid, char *name, nc_type *xtypep,
                int *ndimsp, int *dimidsp, int *nattsp,
                int *shufflep, int *deflatep, int *deflate_levelp,
                int *fletcher32p, int *contiguousp, size_t *chunksizesp,
                int *no_fill, void *fill_valuep, int *endiannessp,
                unsigned int *idp, size_t *nparamsp, unsigned int *params)
{
    int status;
    NC *nc;

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    status = ncmpi_inq_var(nc->int_ncid, varid, name, xtypep, ndimsp, dimidsp, nattsp);
    if (status != NC_NOERR) return status;
    if (shufflep) *shufflep = 0;
    if (deflatep) *deflatep = 0;
    if (fletcher32p) *fletcher32p = 0;
    if (contiguousp) *contiguousp = NC_CONTIGUOUS;
#if (PNETCDF_VERSION_MAJOR*10000 + PNETCDF_VERSION_MINOR*100 + PNETCDF_VERSION_SUB >= 10601)
    /* ncmpi_inq_var_fill was first implemented in PnetCDF 1.6.1 */
    if (no_fill) {
        status = ncmpi_inq_var_fill(nc->int_ncid, varid, no_fill, fill_valuep);
        if (status != NC_NOERR) return status;
    }
#else
    /* PnetCDF 1.6.0 and priors support NC_NOFILL only */
    if (no_fill) *no_fill = 1;
#endif
    if (endiannessp) return NC_ENOTNC4;
    if (idp) return NC_ENOTNC4;
    if (nparamsp) return NC_ENOTNC4;
    if (params) return NC_ENOTNC4;
    return NC_NOERR;
}

static int
NCP_def_var_fill(int ncid, int varid, int no_fill, const void *fill_value)
{
    NC *nc;
    int status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;
#if (PNETCDF_VERSION_MAJOR*10000 + PNETCDF_VERSION_MINOR*100 + PNETCDF_VERSION_SUB >= 10601)
    /* ncmpi_def_var_fill was first implemented in PnetCDF 1.6.1 */
    return ncmpi_def_var_fill(nc->int_ncid, varid, no_fill, fill_value);
#else
    return NC_EPNETCDF;
#endif
}

static int
NCP_var_par_access(int ncid, int varid, int par_access)
{
    NC *nc;
    NCP_INFO *nc5;
    int status;

    if (par_access != NC_INDEPENDENT && par_access != NC_COLLECTIVE)
        return NC_EINVAL;

#ifdef _DO_NOT_IGNORE_VARID_
    if (varid != NC_GLOBAL) /* PnetCDF cannot do per-variable mode change */
        return NC_EINVAL;
#endif

    status = NC_check_id(ncid, &nc);
    if (status != NC_NOERR) return status;

    nc5 = NCP_DATA(nc);
    assert(nc5);

    /* if currently in data mode */
    if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_DATA)) {
        if (par_access == NC_INDEPENDENT) {
            if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP))
                return NC_NOERR;
            else { /* currently in collective data mode */
                fSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
                return ncmpi_begin_indep_data(nc->int_ncid);
            }
        }
        else { /* want to enter collective data mode */
            if (fIsSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP)) {
                fClr(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
                return ncmpi_end_indep_data(nc->int_ncid);
            }
            else
                return NC_NOERR;
        }
    }
    else { /* currently in define mode */
        if (par_access == NC_INDEPENDENT)
            fSet(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
        else
            fClr(nc5->pnetcdf_access_mode, NCP_MODE_INDEP);
    }
    return NC_NOERR;
}

static int
NCP_show_metadata(int ncid)
{
    return NC_NOERR;
}

static int
NCP_inq_unlimdims(int ncid, int *ndimsp, int *unlimdimidsp)
{
    int retval;
    int unlimid;

    if ((retval = NCP_inq_unlimdim(ncid, &unlimid)))
        return retval;
    if (unlimid != -1) {
        if (ndimsp) *ndimsp = 1;
        if (unlimdimidsp)
            unlimdimidsp[0] = unlimid;
    } else
        if (ndimsp) *ndimsp = 0;
    return NC_NOERR;
}

static int
NCP_inq_type_equal(int ncid1,
                   nc_type typeid1,
                   int ncid2,
                   nc_type typeid2,
                   int *equalp)
{
    /* Check input. */
    if (equalp == NULL) return NC_NOERR;

    if (typeid1 <= NC_NAT || typeid2 <= NC_NAT)
       return NC_EINVAL;

    *equalp = 0; /* assume */

    /* If one is atomic, and the other user-defined, the types are not equal */
    if ((typeid1 <= NC_STRING && typeid2 > NC_STRING) ||
        (typeid2 <= NC_STRING && typeid1 > NC_STRING)) {
        if (equalp) *equalp = 0;
        return NC_NOERR;
    }

    /* If both are atomic types, the answer is easy. */
    if (typeid1 <= ATOMICTYPEMAX5) {
        if (equalp) {
            if (typeid1 == typeid2)
                *equalp = 1;
            else
                *equalp = 0;
        }
        return NC_NOERR;
    }
    return NC_NOERR;
}

static int
NCP_def_grp(int parent_ncid, const char *name, int *new_ncid)
{
    return NC_ENOTNC4;
}

static int
NCP_rename_grp(int ncid, const char *name)
{
    return NC_ENOTNC4;
}

static int
NCP_inq_ncid(int ncid, const char *name, int *grp_ncid)
{
    if (grp_ncid) *grp_ncid = ncid;
    return NC_NOERR;
}

static int
NCP_inq_grps(int ncid, int *numgrps, int *ncids)
{
    if (numgrps)
       *numgrps = 0;
    return NC_NOERR;
}

static int
NCP_inq_grpname(int ncid, char *name)
{
    if (name)
        strcpy(name, "/");
    return NC_NOERR;
}

static int
NCP_inq_grpname_full(int ncid, size_t *lenp, char *full_name)
{
    if (full_name)
        strcpy(full_name, "/");
    if (lenp) *lenp = 1;
    return NC_NOERR;
}

static int
NCP_inq_grp_parent(int ncid, int *parent_ncid)
{
    return NC_ENOGRP;
}

static int
NCP_inq_grp_full_ncid(int ncid, const char *full_name, int *grp_ncid)
{
    return NC_ENOGRP;
}

static int
NCP_inq_varids(int ncid, int *nvarsp, int *varids)
{
    int retval,v,nvars;
    /* This is, effectively, a netcdf-3 file, there is only one group, the root
        group, and its vars have ids 0 thru nvars - 1. */
    if ((retval = NCP_inq(ncid, NULL, &nvars, NULL, NULL)))
        return retval;
    if (nvarsp) *nvarsp = nvars;
    if (varids) {
        for (v=0; v<nvars; v++)
            varids[v] = v;
    }
    return NC_NOERR;
}

static int
NCP_inq_dimids(int ncid, int *ndimsp, int *dimids, int include_parents)
{
    int retval,d,ndims;
    /* If this is like a netcdf-3 file, then the dimids are going to be 0
       thru ndims-1, so just provide them. */
    if ((retval = NCP_inq(ncid, &ndims,  NULL, NULL, NULL)))
        return retval;
    if (ndimsp) *ndimsp = ndims;
    if (dimids) {
        for (d=0; d<ndims; d++)
            dimids[d] = d;
    }
    return NC_NOERR;
}

static int
NCP_inq_typeid(int ncid, const char *name, nc_type *typeidp)
{
    int i;
    for (i=0; i<=ATOMICTYPEMAX5; i++)
        if (!strcmp(name, NC_atomictypename(i))) {
            if (typeidp) *typeidp = i;
                return NC_NOERR;
        }
    return NC_ENOTNC4;
}

static int
NCP_inq_typeids(int ncid, int *ntypes, int *typeids)
{
    if (ntypes) *ntypes = 0;
    return NC_NOERR;
}

static int
NCP_inq_user_type(int ncid, nc_type typeid, char *name, size_t *size,
                  nc_type *base_nc_typep, size_t *nfieldsp, int *classp)
{
    return NC_ENOTNC4;
}

/**************************************************/
/* Pnetcdf Dispatch table */

static const NC_Dispatch NCP_dispatcher = {

NC_FORMATX_PNETCDF,
NC_DISPATCH_VERSION,

NCP_create,
NCP_open,

NCP_redef,
NCP__enddef,
NCP_sync,
NCP_abort,
NCP_close,
NCP_set_fill,
NCP_inq_format,
NCP_inq_format_extended,

NCP_inq,
NCP_inq_type,

NCP_def_dim,
NCP_inq_dimid,
NCP_inq_dim,
NCP_inq_unlimdim,
NCP_rename_dim,

NCP_inq_att,
NCP_inq_attid,
NCP_inq_attname,
NCP_rename_att,
NCP_del_att,
NCP_get_att,
NCP_put_att,

NCP_def_var,
NCP_inq_varid,
NCP_rename_var,
NCP_get_vara,
NCP_put_vara,
NCP_get_vars,
NCP_put_vars,
NCP_get_varm,
NCP_put_varm,

NCP_inq_var_all,

NCP_var_par_access,
NCP_def_var_fill,

NCP_show_metadata,
NCP_inq_unlimdims,

NCP_inq_ncid,
NCP_inq_grps,
NCP_inq_grpname,
NCP_inq_grpname_full,
NCP_inq_grp_parent,
NCP_inq_grp_full_ncid,
NCP_inq_varids,
NCP_inq_dimids,
NCP_inq_typeids,
NCP_inq_type_equal,
NCP_def_grp,
NCP_rename_grp,
NCP_inq_user_type,
NCP_inq_typeid,

NC_NOTNC4_def_compound,
NC_NOTNC4_insert_compound,
NC_NOTNC4_insert_array_compound,
NC_NOTNC4_inq_compound_field,
NC_NOTNC4_inq_compound_fieldindex,
NC_NOTNC4_def_vlen,
NC_NOTNC4_put_vlen_element,
NC_NOTNC4_get_vlen_element,
NC_NOTNC4_def_enum,
NC_NOTNC4_insert_enum,
NC_NOTNC4_inq_enum_member,
NC_NOTNC4_inq_enum_ident,
NC_NOTNC4_def_opaque,
NC_NOTNC4_def_var_deflate,
NC_NOTNC4_def_var_fletcher32,
NC_NOTNC4_def_var_chunking,
NC_NOTNC4_def_var_endian,
NC_NOTNC4_def_var_filter,
NC_NOTNC4_set_var_chunk_cache,
NC_NOTNC4_get_var_chunk_cache,

NC_NOOP_inq_var_filter_ids,
NC_NOOP_inq_var_filter_info,
};

const NC_Dispatch *NCP_dispatch_table = NULL; /* moved here from ddispatch.c */

int
NCP_initialize(void)
{
    NCP_dispatch_table = &NCP_dispatcher;
    return NC_NOERR;
}

int
NCP_finalize(void)
{
    return NC_NOERR;
}