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https://github.com/Unidata/netcdf-c.git
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25d2e05444
Rename some files in prep for eventual implementation of more comprehensive cross-platform file path management.
105 lines
2.2 KiB
C
105 lines
2.2 KiB
C
/*! \file
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Copyright 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000, 2001, 2002,
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2003, 2004, 2005, 2006, 2007, 2008, 2009, 2010, 2011, 2012, 2013, 2014,
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2015, 2016, 2017, 2018
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University Corporation for Atmospheric Research/Unidata.
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See \ref copyright file for more info.
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*/
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#include <config.h>
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#include <stdio.h>
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#include <stdlib.h>
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#ifdef HAVE_UNISTD_H
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#include <unistd.h>
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#endif
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#include "netcdf.h"
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#include "netcdf_mem.h"
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#include "ncbytes.h"
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#include "ncpathmgr.h"
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#include "nc_tests.h"
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#ifdef USE_HDF5
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#include <hdf5.h>
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extern int H5Eprint1(FILE * stream);
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#endif
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static int
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readfile(const char* path, NC_memio* memio)
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{
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int status = NC_NOERR;
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int fd = -1;
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off_t filesize = 0;
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off_t count = 0;
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char* memory = NULL;
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char* p = NULL;
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int oflags = O_RDONLY;
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#ifdef O_BINARY
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oflags |= O_BINARY;
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#endif
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/* Open the file to get its size*/
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fd = NCopen2(path,oflags);
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if(fd < 0) {
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fprintf(stderr,"cannot open file: %s\n",path);
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status = errno;
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goto done;
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}
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/* get current filesize */
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filesize = lseek(fd,0,SEEK_END);
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if(filesize < 0)
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{status = errno; goto done;}
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count = lseek(fd,0,SEEK_SET); /* rewind */
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/* allocate memory */
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memory = malloc((size_t)filesize);
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if(memory == NULL)
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{status = NC_ENOMEM; goto done;}
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count = filesize;
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p = memory;
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while(count > 0) {
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ssize_t actual;
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actual = read(fd,p,count);
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if(actual <= 0)
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{status = NC_EIO; goto done;}
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count -= actual;
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p += actual;
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}
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if(memio) {
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memio->size = (size_t)filesize;
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memio->memory = memory;
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memory = NULL;
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}
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done:
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if(status != NC_NOERR && memory != NULL)
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free(memory);
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if(fd >= 0) close(fd);
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return status;
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}
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int
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main(int argc, char** argv)
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{
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int retval = NC_NOERR;
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int ncid;
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NC_memio mem;
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char* path = "f03tst_open_mem.nc";
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if(argc > 1)
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path = argv[1];
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if((retval=readfile(path,&mem)))
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goto exit;
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if((retval = nc_open_mem("mem", NC_INMEMORY|NC_NETCDF4, mem.size, mem.memory, &ncid)))
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goto exit;
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if((retval = nc_close(ncid)))
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goto exit;
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if(mem.memory)
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free(mem.memory);
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return 0;
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exit:
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fprintf(stderr,"retval=%d\n",retval);
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return 1;
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}
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