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tst_open_mem.c
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tst_open_mem.c
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#include <config.h>
#include <stdio.h>
#include <stdlib.h>
#ifdef HAVE_UNISTD_H
#include <unistd.h>
#endif
#include "netcdf.h"
#include "netcdf_mem.h"
#include "ncbytes.h"
#include "nc_tests.h"
#ifdef USE_NETCDF4
#include <hdf5.h>
extern int H5Eprint1(FILE * stream);
#endif
static int
readfile(const char* path, NC_memio* memio)
{
int status = NC_NOERR;
FILE* f = NULL;
size_t filesize = 0;
size_t count = 0;
char* memory = NULL;
char* p = NULL;
/* Open the file for reading */
#ifdef _MSC_VER
f = fopen(path,"rb");
#else
f = fopen(path,"r");
#endif
if(f == NULL)
{status = errno; goto done;}
/* get current filesize */
if(fseek(f,0,SEEK_END) < 0)
{status = errno; goto done;}
filesize = (size_t)ftell(f);
/* allocate memory */
memory = malloc((size_t)filesize);
if(memory == NULL)
{status = NC_ENOMEM; goto done;}
/* move pointer back to beginning of file */
rewind(f);
count = filesize;
p = memory;
while(count > 0) {
size_t actual;
actual = fread(p,1,count,f);
if(actual == 0 || ferror(f))
{status = NC_EIO; goto done;}
count -= actual;
p += actual;
}
if(memio) {
memio->size = (size_t)filesize;
memio->memory = memory;
}
done:
if(status != NC_NOERR && memory != NULL)
free(memory);
if(f != NULL) fclose(f);
return status;
}
int
main(int argc, char** argv)
{
int retval = NC_NOERR;
int ncid;
NC_memio mem;
char* path = "f03tst_open_mem.nc";
if(argc > 1)
path = argv[1];
if((retval=readfile(path,&mem)))
goto exit;
if((retval = nc_open_mem("mem", NC_INMEMORY|NC_NETCDF4, mem.size, mem.memory, &ncid)))
goto exit;
if((retval = nc_close(ncid)))
goto exit;
return 0;
exit:
fprintf(stderr,"retval=%d\n",retval);
return 1;
}