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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 "netcdf.h"
#include "ncio.h"
#include "fbits.h"
#include "ncuri.h"
#include "ncrc.h"
/* With the advent of diskless io, we need to provide
for multiple ncio packages at the same time,
so we have multiple versions of ncio_create.
*/
/* Define known ncio packages */
extern int posixio_create(const char*,int,size_t,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int posixio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int stdio_create(const char*,int,size_t,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int stdio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
#ifdef USE_FFIO
extern int ffio_create(const char*,int,size_t,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int ffio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
#endif
# ifdef USE_MMAP
extern int mmapio_create(const char*,int,size_t,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int mmapio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
# endif
#ifdef NETCDF_ENABLE_BYTERANGE
extern int httpio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
#endif
#ifdef NETCDF_ENABLE_S3
extern int s3io_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
#endif
extern int memio_create(const char*,int,size_t,off_t,size_t,size_t*,void*,ncio**,void** const);
extern int memio_open(const char*,int,off_t,size_t,size_t*,void*,ncio**,void** const);
/* Forward */
#ifdef NETCDF_ENABLE_BYTERANGE
static int urlmodetest(const char* path);
#endif
int
ncio_create(const char *path, int ioflags, size_t initialsz,
off_t igeto, size_t igetsz, size_t *sizehintp,
void* parameters,
ncio** iopp, void** const mempp)
{
if(fIsSet(ioflags,NC_DISKLESS)) {
return memio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
} else if(fIsSet(ioflags,NC_INMEMORY)) {
return memio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# ifdef USE_MMAP
else if(fIsSet(ioflags,NC_MMAP)) {
return mmapio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# endif /*USE_MMAP*/
#ifdef USE_STDIO
return stdio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#elif defined(USE_FFIO)
return ffio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#else
return posixio_create(path,ioflags,initialsz,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#endif
}
int
ncio_open(const char *path, int ioflags,
off_t igeto, size_t igetsz, size_t *sizehintp,
void* parameters,
ncio** iopp, void** const mempp)
{
#ifdef NETCDF_ENABLE_BYTERANGE
int modetest = urlmodetest(path);
#endif
/* Diskless open has the following constraints:
1. file must be classic version 1 or 2 or 5
*/
if(fIsSet(ioflags,NC_DISKLESS)) {
return memio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
if(fIsSet(ioflags,NC_INMEMORY)) {
return memio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# ifdef USE_MMAP
if(fIsSet(ioflags,NC_MMAP)) {
return mmapio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# endif /*USE_MMAP*/
# ifdef NETCDF_ENABLE_BYTERANGE
if(modetest == NC_HTTP) {
return httpio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# ifdef NETCDF_ENABLE_S3
if(modetest == NC_S3SDK) {
return s3io_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
}
# endif
# endif /*NETCDF_ENABLE_BYTERANGE*/
#ifdef USE_STDIO
return stdio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#elif defined(USE_FFIO)
return ffio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#else
return posixio_open(path,ioflags,igeto,igetsz,sizehintp,parameters,iopp,mempp);
#endif
}
/**************************************************/
/* wrapper functions for the ncio dispatch table */
int
ncio_rel(ncio* const nciop, off_t offset, int rflags)
{
return nciop->rel(nciop,offset,rflags);
}
int
ncio_get(ncio* const nciop, off_t offset, size_t extent,
int rflags, void **const vpp)
{
return nciop->get(nciop,offset,extent,rflags,vpp);
}
int
ncio_move(ncio* const nciop, off_t to, off_t from, size_t nbytes, int rflags)
{
return nciop->move(nciop,to,from,nbytes,rflags);
}
int
ncio_sync(ncio* const nciop)
{
return nciop->sync(nciop);
}
int
ncio_filesize(ncio* const nciop, off_t *filesizep)
{
return nciop->filesize(nciop,filesizep);
}
int
ncio_pad_length(ncio* const nciop, off_t length)
{
return nciop->pad_length(nciop,length);
}
int
ncio_close(ncio* const nciop, int doUnlink)
{
/* close and release all resources associated
with nciop, including nciop
*/
int status = nciop->close(nciop,doUnlink);
return status;
}
/* URL utilities */
/*
Check mode flags and return:
NC_HTTP => byterange
NC_S3SDK => s3
0 => Not URL
*/
#ifdef NETCDF_ENABLE_BYTERANGE
static int
urlmodetest(const char* path)
{
int kind = 0;
NCURI* uri = NULL;
ncuriparse(path,&uri);
if(uri == NULL) return 0; /* Not URL */
if(NC_testmode(uri, "bytes")) {
/* NC_S3SDK takes priority over NC_HTTP */
if(NC_testmode(uri, "s3")) kind = NC_S3SDK; else kind = NC_HTTP;
} else
kind = 0;
ncurifree(uri);
return kind;
}
#endif
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