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/*
* Copyright 2018, University Corporation for Atmospheric Research
* See netcdf/COPYRIGHT file for copying and redistribution conditions.
*/
#ifdef HAVE_CONFIG_H
#include "config.h"
#endif
#include <stdlib.h>
#include <stdio.h>
#include <string.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#ifdef HAVE_GETOPT_H
#include <getopt.h>
#endif
#if defined(_WIN32) && !defined(__MINGW32__)
#include "XGetopt.h"
#else
#include <getopt.h>
#endif
#include "netcdf.h"
#include "ncpathmgr.h"
#include "netcdf_filter.h"
static const char* USAGE =
"ncfilteravail [-t <format>] <filtername>|<filterid> n"
"Options\n"
" -h help"
" -t the formatx name: nc4|nczarr (optional)\n"
"\n"
" <filtername> the filter name \n"
" <filterid> the filter id number \n"
"\n"
"Default format is nc4 if built, then nczarr if built else error.\n"
;
#undef DEBUG
struct Options {
char* format;
char* filtername;
unsigned filterid;
char* url;
} faoptions;
static const struct Filter {
char* name;
unsigned id;
} known_filters[] = {
{"deflate",1},
{"szip",4},
{"bzip2",307},
{"zstd",32015},
{"zstandard",32015},
{"blosc",32001},
{NULL,0}
};
static void usage(const char* msg);
static void
usage(const char* msg)
{
if(msg != NULL) fprintf(stderr,"%s\n",msg);
fprintf(stderr,"%s",USAGE);
if(msg == NULL) exit(0); else exit(1);
}
static int
getformat(const char* sformat)
{
if(sformat != NULL && strlen(sformat) > 0) {
if(strcmp(sformat,"nc4")==0) return NC_FORMATX_NC4;
if(strcmp(sformat,"nczarr")==0) return NC_FORMATX_NCZARR;
}
#ifdef USE_HDF5
return NC_FORMATX_NC4;
#else
# ifdef ENABLE_NCZARR
return NC_FORMATX_NCZARR;
# endif
#endif
return NC_FORMATX_UNDEFINED;
}
static int
makeurl(struct Options* faopt)
{
int stat = NC_NOERR;
int format;
char url[4096];
int pid;
#if defined(_WIN32) || defined(__MINGW32__)
pid = (int)_getpid();
#else
pid = (int)getpid();
#endif
switch (format = getformat(faopt->format)) {
case NC_FORMATX_NC4:
snprintf(url,sizeof(url),"tmp_%d.nc",pid);
break;
case NC_FORMATX_NCZARR:
snprintf(url,sizeof(url),"file://tmp_%d.file#mode=zarr,file",pid);
break;
default: stat = NC_EINVAL; break;
}
if(stat == NC_NOERR) faopt->url = strdup(url);
return stat;
}
static int
makefilterid(struct Options* faopt)
{
int stat = NC_NOERR;
const struct Filter* f = NULL;
for(f=known_filters;f->name;f++) {
if(strcmp(f->name,faopt->filtername)==0) {
faopt->filterid = f->id;
goto done;
}
}
/* See if it is a number */
if(1!=sscanf(faopt->filtername,"%u",&faopt->filterid))
{stat = NC_EINVAL; goto done;}
done:
return stat;
}
int
main(int argc, char** argv)
{
int c, ncid, stat = NC_NOERR;
int yesno = 0;
memset((void*)&faoptions,0,sizeof(faoptions));
while ((c = getopt(argc, argv, "t:")) != EOF) {
switch(c) {
case 'h': usage(""); break;
case 'x': faoptions.format = strdup(optarg); break;
case '?':
usage("unknown option");
break;
}
}
argc -= optind;
argv += optind;
/* If no filter arguments left or more than one, print usage message. */
if (argc == 0)
usage("no filter specified");
if (argc > 1)
usage("more than one filter specified");
faoptions.filtername = strdup(argv[0]);
if(makeurl(&faoptions)) {yesno = 0; goto done;}
if(makefilterid(&faoptions)) {yesno = 0; goto done;}
if((stat = nc_create(faoptions.url,NC_NETCDF4,&ncid))) goto done;
switch(stat = nc_inq_filter_avail(ncid,faoptions.filterid)) {
case NC_NOERR: yesno = 1; break;
case NC_ENOFILTER: yesno = 0; stat = NC_NOERR; break;
default: break;
}
if((stat = nc_abort(ncid))) goto done;
done:
printf("%s",(yesno?"yes":"no"));
if(stat) fprintf(stderr,"error: (%d) %s\n",stat,nc_strerror(stat));
return (stat?1:0);
}
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