forked from Unidata/netcdf-c
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nc3internal.c
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nc3internal.c
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/*
* Copyright 1996, Unuiversity Corporation for Atmospheric Research
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*/
#if HAVE_CONFIG_H
#include <config.h>
#endif
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#if defined(LOCKNUMREC) /* && _CRAYMPP */
# include <mpp/shmem.h>
# include <intrinsics.h>
#endif
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "nc3internal.h"
#include "rnd.h"
#include "ncx.h"
/* These have to do with version numbers. */
#define MAGIC_NUM_LEN 4
#define VER_CLASSIC 1
#define VER_64BIT_OFFSET 2
#define VER_HDF5 3
#define NC_NUMRECS_OFFSET 4
/* For netcdf classic */
#define NC_NUMRECS_EXTENT3 4
/* For cdf5 */
#define NC_NUMRECS_EXTENT5 8
static void
free_NC3INFO(NC3_INFO *nc3)
{
if(nc3 == NULL)
return;
free_NC_dimarrayV(&nc3->dims);
free_NC_attrarrayV(&nc3->attrs);
free_NC_vararrayV(&nc3->vars);
#if _CRAYMPP && defined(LOCKNUMREC)
shfree(nc3);
#else
free(nc3);
#endif /* _CRAYMPP && LOCKNUMREC */
}
static NC3_INFO *
new_NC3INFO(const size_t *chunkp)
{
NC3_INFO *ncp;
ncp = (NC3_INFO*)calloc(1,sizeof(NC3_INFO));
if(ncp == NULL) return ncp;
ncp->chunk = chunkp != NULL ? *chunkp : NC_SIZEHINT_DEFAULT;
/* Note that ncp->xsz is not set yet because we do not know the file format */
return ncp;
}
static NC3_INFO *
dup_NC3INFO(const NC3_INFO *ref)
{
NC3_INFO *ncp;
ncp = (NC3_INFO*)calloc(1,sizeof(NC3_INFO));
if(ncp == NULL) return ncp;
if(dup_NC_dimarrayV(&ncp->dims, &ref->dims) != NC_NOERR)
goto err;
if(dup_NC_attrarrayV(&ncp->attrs, &ref->attrs) != NC_NOERR)
goto err;
if(dup_NC_vararrayV(&ncp->vars, &ref->vars) != NC_NOERR)
goto err;
ncp->xsz = ref->xsz;
ncp->begin_var = ref->begin_var;
ncp->begin_rec = ref->begin_rec;
ncp->recsize = ref->recsize;
NC_set_numrecs(ncp, NC_get_numrecs(ref));
return ncp;
err:
free_NC3INFO(ncp);
return NULL;
}
/*
* Verify that this is a user nc_type
* Formerly NCcktype()
* Sense of the return is changed.
*/
int
nc3_cktype(int mode, nc_type type)
{
#ifdef USE_CDF5
if (mode & NC_CDF5) { /* CDF-5 format */
if (type >= NC_BYTE && type < NC_STRING) return NC_NOERR;
} else
#endif
if (mode & NC_64BIT_OFFSET) { /* CDF-2 format */
if (type >= NC_BYTE && type <= NC_DOUBLE) return NC_NOERR;
} else if ((mode & NC_64BIT_OFFSET) == 0) { /* CDF-1 format */
if (type >= NC_BYTE && type <= NC_DOUBLE) return NC_NOERR;
}
return(NC_EBADTYPE);
}
/*
* How many objects of 'type'
* will fit into xbufsize?
*/
size_t
ncx_howmany(nc_type type, size_t xbufsize)
{
switch(type){
case NC_BYTE:
case NC_CHAR:
return xbufsize;
case NC_SHORT:
return xbufsize/X_SIZEOF_SHORT;
case NC_INT:
return xbufsize/X_SIZEOF_INT;
case NC_FLOAT:
return xbufsize/X_SIZEOF_FLOAT;
case NC_DOUBLE:
return xbufsize/X_SIZEOF_DOUBLE;
case NC_UBYTE:
return xbufsize;
case NC_USHORT:
return xbufsize/X_SIZEOF_USHORT;
case NC_UINT:
return xbufsize/X_SIZEOF_UINT;
case NC_INT64:
return xbufsize/X_SIZEOF_LONGLONG;
case NC_UINT64:
return xbufsize/X_SIZEOF_ULONGLONG;
default:
assert("ncx_howmany: Bad type" == 0);
return(0);
}
}
#define D_RNDUP(x, align) _RNDUP(x, (off_t)(align))
/*
* Compute each variable's 'begin' offset,
* update 'begin_rec' as well.
*/
static int
NC_begins(NC3_INFO* ncp,
size_t h_minfree, size_t v_align,
size_t v_minfree, size_t r_align)
{
size_t ii, j;
int sizeof_off_t;
off_t index = 0;
NC_var **vpp;
NC_var *last = NULL;
NC_var *first_var = NULL; /* first "non-record" var */
if(v_align == NC_ALIGN_CHUNK)
v_align = ncp->chunk;
if(r_align == NC_ALIGN_CHUNK)
r_align = ncp->chunk;
if (fIsSet(ncp->flags, NC_64BIT_OFFSET) || fIsSet(ncp->flags, NC_64BIT_DATA)) {
sizeof_off_t = 8;
} else {
sizeof_off_t = 4;
}
ncp->xsz = ncx_len_NC(ncp,sizeof_off_t);
if(ncp->vars.nelems == 0)
return NC_NOERR;
/* only (re)calculate begin_var if there is not sufficient space in header
or start of non-record variables is not aligned as requested by valign */
if (ncp->begin_var < ncp->xsz + h_minfree ||
ncp->begin_var != D_RNDUP(ncp->begin_var, v_align) )
{
index = (off_t) ncp->xsz;
ncp->begin_var = D_RNDUP(index, v_align);
if(ncp->begin_var < index + h_minfree)
{
ncp->begin_var = D_RNDUP(index + (off_t)h_minfree, v_align);
}
}
if (ncp->old != NULL) {
/* check whether the new begin_var is smaller */
if (ncp->begin_var < ncp->old->begin_var)
ncp->begin_var = ncp->old->begin_var;
}
index = ncp->begin_var;
/* loop thru vars, first pass is for the 'non-record' vars */
j = 0;
vpp = ncp->vars.value;
for(ii = 0; ii < ncp->vars.nelems ; ii++, vpp++)
{
if( IS_RECVAR(*vpp) )
{
/* skip record variables on this pass */
continue;
}
if (first_var == NULL) first_var = *vpp;
#if 0
fprintf(stderr, " VAR %d %s: %ld\n", ii, (*vpp)->name->cp, (long)index);
#endif
if( sizeof_off_t == 4 && (index > X_OFF_MAX || index < 0) )
{
return NC_EVARSIZE;
}
(*vpp)->begin = index;
if (ncp->old != NULL) {
/* move to the next fixed variable */
for (; j<ncp->old->vars.nelems; j++) {
if (!IS_RECVAR(ncp->old->vars.value[j]))
break;
}
if (j < ncp->old->vars.nelems) {
if ((*vpp)->begin < ncp->old->vars.value[j]->begin) {
/* the first ncp->vars.nelems fixed variables
should be the same. If the new begin is smaller,
reuse the old begin */
(*vpp)->begin = ncp->old->vars.value[j]->begin;
index = (*vpp)->begin;
}
j++;
}
}
index += (*vpp)->len;
}
if (ncp->old != NULL) {
/* check whether the new begin_rec is smaller */
if (ncp->begin_rec < ncp->old->begin_rec)
ncp->begin_rec = ncp->old->begin_rec;
}
/* only (re)calculate begin_rec if there is not sufficient
space at end of non-record variables or if start of record
variables is not aligned as requested by r_align */
if (ncp->begin_rec < index + v_minfree ||
ncp->begin_rec != D_RNDUP(ncp->begin_rec, r_align) )
{
ncp->begin_rec = D_RNDUP(index, r_align);
if(ncp->begin_rec < index + v_minfree)
{
ncp->begin_rec = D_RNDUP(index + (off_t)v_minfree, r_align);
}
}
if (first_var != NULL)
ncp->begin_var = first_var->begin;
else
ncp->begin_var = ncp->begin_rec;
index = ncp->begin_rec;
ncp->recsize = 0;
/* loop thru vars, second pass is for the 'record' vars */
j = 0;
vpp = (NC_var **)ncp->vars.value;
for(ii = 0; ii < ncp->vars.nelems; ii++, vpp++)
{
if( !IS_RECVAR(*vpp) )
{
/* skip non-record variables on this pass */
continue;
}
#if 0
fprintf(stderr, " REC %d %s: %ld\n", ii, (*vpp)->name->cp, (long)index);
#endif
if( sizeof_off_t == 4 && (index > X_OFF_MAX || index < 0) )
{
return NC_EVARSIZE;
}
(*vpp)->begin = index;
if (ncp->old != NULL) {
/* move to the next record variable */
for (; j<ncp->old->vars.nelems; j++)
if (IS_RECVAR(ncp->old->vars.value[j]))
break;
if (j < ncp->old->vars.nelems) {
if ((*vpp)->begin < ncp->old->vars.value[j]->begin)
/* if the new begin is smaller, use the old begin */
(*vpp)->begin = ncp->old->vars.value[j]->begin;
j++;
}
}
index += (*vpp)->len;
/* check if record size must fit in 32-bits */
#if SIZEOF_OFF_T == SIZEOF_SIZE_T && SIZEOF_SIZE_T == 4
if( ncp->recsize > X_UINT_MAX - (*vpp)->len )
{
return NC_EVARSIZE;
}
#endif
if((*vpp)->len != UINT32_MAX) /* flag for vars >= 2**32 bytes */
ncp->recsize += (*vpp)->len;
last = (*vpp);
}
/*
* for special case of
*/
if(last != NULL) {
if(ncp->recsize == last->len) { /* exactly one record variable, pack value */
ncp->recsize = *last->dsizes * last->xsz;
} else if(last->len == UINT32_MAX) { /* huge last record variable */
ncp->recsize += *last->dsizes * last->xsz;
}
}
if(NC_IsNew(ncp))
NC_set_numrecs(ncp, 0);
return NC_NOERR;
}
/*
* Read just the numrecs member.
* (A relatively expensive way to do things.)
*/
int
read_numrecs(NC3_INFO *ncp)
{
int status = NC_NOERR;
const void *xp = NULL;
size_t new_nrecs = 0;
size_t old_nrecs = NC_get_numrecs(ncp);
size_t nc_numrecs_extent = NC_NUMRECS_EXTENT3; /* CDF-1 and CDF-2 */
assert(!NC_indef(ncp));
if (fIsSet(ncp->flags, NC_64BIT_DATA))
nc_numrecs_extent = NC_NUMRECS_EXTENT5; /* CDF-5 */
status = ncio_get(ncp->nciop,
NC_NUMRECS_OFFSET, nc_numrecs_extent, 0, (void **)&xp);/* cast away const */
if(status != NC_NOERR)
return status;
if (fIsSet(ncp->flags, NC_64BIT_DATA)) {
unsigned long long tmp=0;
status = ncx_get_uint64(&xp, &tmp);
new_nrecs = (size_t)tmp;
} else
status = ncx_get_size_t(&xp, &new_nrecs);
(void) ncio_rel(ncp->nciop, NC_NUMRECS_OFFSET, 0);
if(status == NC_NOERR && old_nrecs != new_nrecs)
{
NC_set_numrecs(ncp, new_nrecs);
fClr(ncp->flags, NC_NDIRTY);
}
return status;
}
/*
* Write out just the numrecs member.
* (A relatively expensive way to do things.)
*/
int
write_numrecs(NC3_INFO *ncp)
{
int status = NC_NOERR;
void *xp = NULL;
size_t nc_numrecs_extent = NC_NUMRECS_EXTENT3; /* CDF-1 and CDF-2 */
assert(!NC_readonly(ncp));
assert(!NC_indef(ncp));
if (fIsSet(ncp->flags, NC_64BIT_DATA))
nc_numrecs_extent = NC_NUMRECS_EXTENT5; /* CDF-5 */
status = ncio_get(ncp->nciop,
NC_NUMRECS_OFFSET, nc_numrecs_extent, RGN_WRITE, &xp);
if(status != NC_NOERR)
return status;
{
const size_t nrecs = NC_get_numrecs(ncp);
if (fIsSet(ncp->flags, NC_64BIT_DATA))
status = ncx_put_uint64(&xp, (unsigned long long)nrecs);
else
status = ncx_put_size_t(&xp, &nrecs);
}
(void) ncio_rel(ncp->nciop, NC_NUMRECS_OFFSET, RGN_MODIFIED);
if(status == NC_NOERR)
fClr(ncp->flags, NC_NDIRTY);
return status;
}
/*
* Read in the header
* It is expensive.
*/
static int
read_NC(NC3_INFO *ncp)
{
int status = NC_NOERR;
free_NC_dimarrayV(&ncp->dims);
free_NC_attrarrayV(&ncp->attrs);
free_NC_vararrayV(&ncp->vars);
status = nc_get_NC(ncp);
if(status == NC_NOERR)
fClr(ncp->flags, NC_NDIRTY | NC_HDIRTY);
return status;
}
/*
* Write out the header
*/
static int
write_NC(NC3_INFO *ncp)
{
int status = NC_NOERR;
assert(!NC_readonly(ncp));
status = ncx_put_NC(ncp, NULL, 0, 0);
if(status == NC_NOERR)
fClr(ncp->flags, NC_NDIRTY | NC_HDIRTY);
return status;
}
/*
* Write the header or the numrecs if necessary.
*/
int
NC_sync(NC3_INFO *ncp)
{
assert(!NC_readonly(ncp));
if(NC_hdirty(ncp))
{
return write_NC(ncp);
}
/* else */
if(NC_ndirty(ncp))
{
return write_numrecs(ncp);
}
/* else */
return NC_NOERR;
}
/*
* Initialize the 'non-record' variables.
*/
static int
fillerup(NC3_INFO *ncp)
{
int status = NC_NOERR;
size_t ii;
NC_var **varpp;
assert(!NC_readonly(ncp));
assert(NC_dofill(ncp));
/* loop thru vars */
varpp = ncp->vars.value;
for(ii = 0; ii < ncp->vars.nelems; ii++, varpp++)
{
if(IS_RECVAR(*varpp))
{
/* skip record variables */
continue;
}
status = fill_NC_var(ncp, *varpp, (*varpp)->len, 0);
if(status != NC_NOERR)
break;
}
return status;
}
/* Begin endef */
/*
*/
static int
fill_added_recs(NC3_INFO *gnu, NC3_INFO *old)
{
NC_var ** const gnu_varpp = (NC_var **)gnu->vars.value;
const int old_nrecs = (int) NC_get_numrecs(old);
int recno = 0;
NC_var **vpp = gnu_varpp;
NC_var *const *const end = &vpp[gnu->vars.nelems];
int numrecvars = 0;
/* Determine if there is only one record variable. If so, we
must treat as a special case because there's no record padding */
for(; vpp < end; vpp++) {
if(IS_RECVAR(*vpp)) {
numrecvars++;
}
}
for(; recno < old_nrecs; recno++)
{
int varid = (int)old->vars.nelems;
for(; varid < (int)gnu->vars.nelems; varid++)
{
const NC_var *const gnu_varp = *(gnu_varpp + varid);
if(!IS_RECVAR(gnu_varp))
{
/* skip non-record variables */
continue;
}
/* else */
{
size_t varsize = numrecvars == 1 ? gnu->recsize : gnu_varp->len;
const int status = fill_NC_var(gnu, gnu_varp, varsize, recno);
if(status != NC_NOERR)
return status;
}
}
}
return NC_NOERR;
}
/*
*/
static int
fill_added(NC3_INFO *gnu, NC3_INFO *old)
{
NC_var ** const gnu_varpp = (NC_var **)gnu->vars.value;
int varid = (int)old->vars.nelems;
for(; varid < (int)gnu->vars.nelems; varid++)
{
const NC_var *const gnu_varp = *(gnu_varpp + varid);
if(IS_RECVAR(gnu_varp))
{
/* skip record variables */
continue;
}
/* else */
{
const int status = fill_NC_var(gnu, gnu_varp, gnu_varp->len, 0);
if(status != NC_NOERR)
return status;
}
}
return NC_NOERR;
}
/*
* Move the records "out".
* Fill as needed.
*/
static int
move_recs_r(NC3_INFO *gnu, NC3_INFO *old)
{
int status;
int recno;
int varid;
NC_var **gnu_varpp = (NC_var **)gnu->vars.value;
NC_var **old_varpp = (NC_var **)old->vars.value;
NC_var *gnu_varp;
NC_var *old_varp;
off_t gnu_off;
off_t old_off;
const size_t old_nrecs = NC_get_numrecs(old);
/* Don't parallelize this loop */
for(recno = (int)old_nrecs -1; recno >= 0; recno--)
{
/* Don't parallelize this loop */
for(varid = (int)old->vars.nelems -1; varid >= 0; varid--)
{
gnu_varp = *(gnu_varpp + varid);
if(!IS_RECVAR(gnu_varp))
{
/* skip non-record variables on this pass */
continue;
}
/* else */
/* else, a pre-existing variable */
old_varp = *(old_varpp + varid);
gnu_off = gnu_varp->begin + (off_t)(gnu->recsize * recno);
old_off = old_varp->begin + (off_t)(old->recsize * recno);
if(gnu_off == old_off)
continue; /* nothing to do */
assert(gnu_off > old_off);
status = ncio_move(gnu->nciop, gnu_off, old_off,
old_varp->len, 0);
if(status != NC_NOERR)
return status;
}
}
NC_set_numrecs(gnu, old_nrecs);
return NC_NOERR;
}
/*
* Move the "non record" variables "out".
* Fill as needed.
*/
static int
move_vars_r(NC3_INFO *gnu, NC3_INFO *old)
{
int err, status=NC_NOERR;
int varid;
NC_var **gnu_varpp = (NC_var **)gnu->vars.value;
NC_var **old_varpp = (NC_var **)old->vars.value;
NC_var *gnu_varp;
NC_var *old_varp;
off_t gnu_off;
off_t old_off;
/* Don't parallelize this loop */
for(varid = (int)old->vars.nelems -1;
varid >= 0; varid--)
{
gnu_varp = *(gnu_varpp + varid);
if(IS_RECVAR(gnu_varp))
{
/* skip record variables on this pass */
continue;
}
/* else */
old_varp = *(old_varpp + varid);
gnu_off = gnu_varp->begin;
old_off = old_varp->begin;
if (gnu_off > old_off) {
err = ncio_move(gnu->nciop, gnu_off, old_off,
old_varp->len, 0);
if (status == NC_NOERR) status = err;
}
}
return status;
}
/*
* Given a valid ncp, return NC_EVARSIZE if any variable has a bad len
* (product of non-rec dim sizes too large), else return NC_NOERR.
*/
int
NC_check_vlens(NC3_INFO *ncp)
{
NC_var **vpp;
/* maximum permitted variable size (or size of one record's worth
of a record variable) in bytes. This is different for format 1
and format 2. */
size_t vlen_max;
size_t ii;
size_t large_vars_count;
size_t rec_vars_count;
int last = 0;
if(ncp->vars.nelems == 0)
return NC_NOERR;
if (fIsSet(ncp->flags,NC_64BIT_DATA)) {
/* CDF5 format allows many large vars */
return NC_NOERR;
}
if (fIsSet(ncp->flags,NC_64BIT_OFFSET) && sizeof(off_t) > 4) {
/* CDF2 format and LFS */
vlen_max = X_UINT_MAX - 3; /* "- 3" handles rounded-up size */
} else {
/* CDF1 format */
vlen_max = X_INT_MAX - 3;
}
/* Loop through vars, first pass is for non-record variables. */
large_vars_count = 0;
rec_vars_count = 0;
vpp = ncp->vars.value;
for (ii = 0; ii < ncp->vars.nelems; ii++, vpp++) {
if( !IS_RECVAR(*vpp) ) {
last = 0;
if( NC_check_vlen(*vpp, vlen_max) == 0 ) {
large_vars_count++;
last = 1;
}
} else {
rec_vars_count++;
}
}
/* OK if last non-record variable size too large, since not used to
compute an offset */
if( large_vars_count > 1) { /* only one "too-large" variable allowed */
return NC_EVARSIZE;
}
/* and it has to be the last one */
if( large_vars_count == 1 && last == 0) {
return NC_EVARSIZE;
}
if( rec_vars_count > 0 ) {
/* and if it's the last one, there can't be any record variables */
if( large_vars_count == 1 && last == 1) {
return NC_EVARSIZE;
}
/* Loop through vars, second pass is for record variables. */
large_vars_count = 0;
vpp = ncp->vars.value;
for (ii = 0; ii < ncp->vars.nelems; ii++, vpp++) {
if( IS_RECVAR(*vpp) ) {
last = 0;
if( NC_check_vlen(*vpp, vlen_max) == 0 ) {
large_vars_count++;
last = 1;
}
}
}
/* OK if last record variable size too large, since not used to
compute an offset */
if( large_vars_count > 1) { /* only one "too-large" variable allowed */
return NC_EVARSIZE;
}
/* and it has to be the last one */
if( large_vars_count == 1 && last == 0) {
return NC_EVARSIZE;
}
}
return NC_NOERR;
}
/*
* End define mode.
* Common code for ncendef, ncclose(endef)
* Flushes I/O buffers.
*/
static int
NC_endef(NC3_INFO *ncp,
size_t h_minfree, size_t v_align,
size_t v_minfree, size_t r_align)
{
int status = NC_NOERR;
assert(!NC_readonly(ncp));
assert(NC_indef(ncp));
status = NC_check_vlens(ncp);
if(status != NC_NOERR)
return status;
status = NC_begins(ncp, h_minfree, v_align, v_minfree, r_align);
if(status != NC_NOERR)
return status;
if(ncp->old != NULL)
{
/* a plain redef, not a create */
assert(!NC_IsNew(ncp));
assert(fIsSet(ncp->flags, NC_INDEF));
assert(ncp->begin_rec >= ncp->old->begin_rec);
assert(ncp->begin_var >= ncp->old->begin_var);
if(ncp->vars.nelems != 0)
{
if(ncp->begin_rec > ncp->old->begin_rec)
{
status = move_recs_r(ncp, ncp->old);
if(status != NC_NOERR)
return status;
if(ncp->begin_var > ncp->old->begin_var)
{
status = move_vars_r(ncp, ncp->old);
if(status != NC_NOERR)
return status;
}
/* else if (ncp->begin_var == ncp->old->begin_var) { NOOP } */
}
else
{
/* due to fixed variable alignment, it is possible that header
grows but begin_rec did not change */
if(ncp->begin_var > ncp->old->begin_var)
{
status = move_vars_r(ncp, ncp->old);
if(status != NC_NOERR)
return status;
}
/* Even if (ncp->begin_rec == ncp->old->begin_rec)
and (ncp->begin_var == ncp->old->begin_var)
might still have added a new record variable */
if(ncp->recsize > ncp->old->recsize)
{
status = move_recs_r(ncp, ncp->old);
if(status != NC_NOERR)
return status;
}
}
}
}
status = write_NC(ncp);
if(status != NC_NOERR)
return status;
if(NC_dofill(ncp))
{
if(NC_IsNew(ncp))
{
status = fillerup(ncp);
if(status != NC_NOERR)
return status;
}
else if(ncp->old == NULL ? 0
: (ncp->vars.nelems > ncp->old->vars.nelems))
{
status = fill_added(ncp, ncp->old);
if(status != NC_NOERR)
return status;
status = fill_added_recs(ncp, ncp->old);
if(status != NC_NOERR)
return status;
}
}
if(ncp->old != NULL)
{
free_NC3INFO(ncp->old);
ncp->old = NULL;
}
fClr(ncp->flags, NC_CREAT | NC_INDEF);
return ncio_sync(ncp->nciop);
}
#ifdef LOCKNUMREC
static int
NC_init_pe(NC *ncp, int basepe) {
if (basepe < 0 || basepe >= _num_pes()) {
return NC_EINVAL; /* invalid base pe */
}
/* initialize common values */
ncp->lock[LOCKNUMREC_VALUE] = 0;
ncp->lock[LOCKNUMREC_LOCK] = 0;
ncp->lock[LOCKNUMREC_SERVING] = 0;
ncp->lock[LOCKNUMREC_BASEPE] = basepe;
return NC_NOERR;
}
#endif
/*
* Compute the expected size of the file.
*/
int
NC_calcsize(const NC3_INFO *ncp, off_t *calcsizep)
{
NC_var **vpp = (NC_var **)ncp->vars.value;
NC_var *const *const end = &vpp[ncp->vars.nelems];
NC_var *last_fix = NULL; /* last "non-record" var */
int numrecvars = 0; /* number of record variables */
if(ncp->vars.nelems == 0) { /* no non-record variables and
no record variables */
*calcsizep = ncp->xsz; /* size of header */
return NC_NOERR;
}
for( /*NADA*/; vpp < end; vpp++) {
if(IS_RECVAR(*vpp)) {
numrecvars++;
} else {
last_fix = *vpp;
}
}
if(numrecvars == 0) {
off_t varsize;
assert(last_fix != NULL);
varsize = last_fix->len;
if(last_fix->len == X_UINT_MAX) { /* huge last fixed var */
int i;
varsize = 1;
for(i = 0; i < last_fix->ndims; i++ ) {
varsize *= (last_fix->shape ? last_fix->shape[i] : 1);
}
}
*calcsizep = last_fix->begin + varsize;
/*last_var = last_fix;*/
} else { /* we have at least one record variable */
*calcsizep = ncp->begin_rec + ncp->numrecs * ncp->recsize;
}
return NC_NOERR;
}
/* Public */
#if 0 /* no longer needed */
int NC3_new_nc(NC3_INFO** ncpp)
{
NC *nc;
NC3_INFO* nc3;
#if _CRAYMPP && defined(LOCKNUMREC)
ncp = (NC *) shmalloc(sizeof(NC));
#else
ncp = (NC *) malloc(sizeof(NC));
#endif /* _CRAYMPP && LOCKNUMREC */
if(ncp == NULL)
return NC_ENOMEM;
(void) memset(ncp, 0, sizeof(NC));
ncp->xsz = MIN_NC_XSZ;
assert(ncp->xsz == ncx_len_NC(ncp,0));
if(ncpp) *ncpp = ncp;
return NC_NOERR;
}
#endif
/* WARNING: SIGNATURE CHANGE */
int
NC3_create(const char *path, int ioflags,
size_t initialsz, int basepe,
size_t *chunksizehintp,
int use_parallel, void* parameters,
NC_Dispatch* dispatch, NC* nc)
{
int status;
void *xp = NULL;
int sizeof_off_t = 0;
NC3_INFO* nc3 = NULL;
/* Create our specific NC3_INFO instance */
nc3 = new_NC3INFO(chunksizehintp);
#if ALWAYS_NC_SHARE /* DEBUG */
fSet(ioflags, NC_SHARE);
#endif
#if defined(LOCKNUMREC) /* && _CRAYMPP */
if (status = NC_init_pe(nc3, basepe)) {
return status;
}
#else
/*
* !_CRAYMPP, only pe 0 is valid
*/
if(basepe != 0) {
if(nc3) free(nc3);
return NC_EINVAL;
}
#endif
assert(nc3->flags == 0);
/* Apply default create format. */
if (nc_get_default_format() == NC_FORMAT_64BIT_OFFSET)
ioflags |= NC_64BIT_OFFSET;