mirror of
https://github.com/Unidata/netcdf-c.git
synced 2024-11-27 07:30:33 +08:00
5ca78309cc
contain as little file-type specific info as possible. It modifies especially libsrc so that all of the netcdf-3 data that used to be in struct NC is now kept in a separate chunk of data pointed to by the struct NC. This makes all of current protocols consistent: netcdf-3, netcdf-4, and dap.
81 lines
1.8 KiB
C
81 lines
1.8 KiB
C
/*********************************************************************
|
|
Copyright 2010, UCAR/Unidata See netcdf/COPYRIGHT file for
|
|
copying and redistribution conditions.
|
|
*********************************************************************/
|
|
|
|
#include <config.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
#include <assert.h>
|
|
#include "nc.h"
|
|
|
|
#define ID_SHIFT (16)
|
|
#define NCFILELISTLENGTH 0x10000
|
|
/* Version one just allocates the max space (sizeof(NC*)*2^16)*/
|
|
static NC** nc_filelist = NULL;
|
|
|
|
static int numfiles = 0;
|
|
|
|
/* Common */
|
|
int
|
|
count_NCList(void)
|
|
{
|
|
return numfiles;
|
|
}
|
|
|
|
|
|
void
|
|
free_NCList(void)
|
|
{
|
|
if(numfiles > 0) return; /* not empty */
|
|
if(nc_filelist != NULL) free(nc_filelist);
|
|
nc_filelist = NULL;
|
|
}
|
|
|
|
int
|
|
add_to_NCList(NC* ncp)
|
|
{
|
|
int i;
|
|
int new_id;
|
|
if(nc_filelist == NULL) {
|
|
if (!(nc_filelist = calloc(1, sizeof(NC*)*NCFILELISTLENGTH)))
|
|
return NC_ENOMEM;
|
|
numfiles = 0;
|
|
}
|
|
new_id = 0; /* id's begin at 1 */
|
|
for(i=1;i<0x10000;i++) {
|
|
if(nc_filelist[i] == NULL) {new_id = i; break;}
|
|
}
|
|
if(new_id == 0) return NC_ENOMEM; /* no more slots */
|
|
nc_filelist[new_id] = ncp;
|
|
numfiles++;
|
|
new_id = (new_id << ID_SHIFT);
|
|
ncp->ext_ncid = new_id;
|
|
return NC_NOERR;
|
|
}
|
|
|
|
void
|
|
del_from_NCList(NC* ncp)
|
|
{
|
|
unsigned int ncid = ((unsigned int)ncp->ext_ncid) >> ID_SHIFT;
|
|
if(numfiles == 0 || ncid == 0 || nc_filelist == NULL) return;
|
|
if(nc_filelist[ncid] != ncp) return;
|
|
nc_filelist[ncid] = NULL;
|
|
numfiles--;
|
|
|
|
/* If all files have been closed, release the filelist memory. */
|
|
if (numfiles == 0)
|
|
free_NCList();
|
|
}
|
|
|
|
NC *
|
|
find_in_NCList(int ext_ncid)
|
|
{
|
|
NC* f = NULL;
|
|
unsigned int ncid = ((unsigned int)ext_ncid) >> ID_SHIFT;
|
|
if(numfiles > 0 && nc_filelist != NULL && ncid < NCFILELISTLENGTH)
|
|
f = nc_filelist[ncid];
|
|
return f;
|
|
}
|
|
|