mirror of
https://github.com/HDFGroup/hdf5.git
synced 2024-11-27 02:10:55 +08:00
88b51be743
Update
Description:
Changed
#include <hdf5_file.h>
to
#include "hdf5_file.h"
so that gcc can find our dependencies files instead of all of the
include files (we don't care about system header files).
Platforms tested:
Linux
120 lines
2.4 KiB
C
120 lines
2.4 KiB
C
/*
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* This program shows the concept of "mounting files".
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* Program creates one file with group G in it, and another
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* file with dataset D. Then second file is mounted in the first one
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* under the "mounting point" G. Dataset D is accessed in the first file
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* under name /G/D and data is printed out.
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*/
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#include "hdf5.h"
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#define FILE1 "mount1.h5"
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#define FILE2 "mount2.h5"
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#define RANK 2
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#define NX 4
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#define NY 5
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int main(void)
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{
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hid_t fid1, fid2, gid; /* Files and group identifiers */
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hid_t did, tid, sid; /* Dataset and datatype identifiers */
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herr_t status;
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hsize_t dims[] = {NX,NY}; /* Dataset dimensions */
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int i, j;
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int bm[NX][NY], bm_out[NX][NY]; /* Data buffers */
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/*
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* Initialization of buffer matrix "bm"
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*/
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for(i =0; i<NX; i++) {
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for(j = 0; j<NY; j++)
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bm[i][j] = i + j;
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}
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/*
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* Create first file and a group in it.
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*/
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fid1 = H5Fcreate(FILE1, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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gid = H5Gcreate(fid1, "/G", 0);
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/*
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* Close group and file
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*/
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H5Gclose(gid);
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H5Fclose(fid1);
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/*
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* Create second file and dataset "D" in it.
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*/
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fid2 = H5Fcreate(FILE2, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
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dims[0] = NX;
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dims[1] = NY;
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sid = H5Screate_simple(RANK, dims, NULL);
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did = H5Dcreate(fid2, "D", H5T_NATIVE_INT, sid, H5P_DEFAULT);
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/*
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* Write data to the dataset.
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*/
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status = H5Dwrite(did, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, bm);
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/*
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* Close all identifiers.
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*/
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H5Sclose(sid);
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H5Dclose(did);
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H5Fclose(fid2);
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/*
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* Reopen both files
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*/
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fid1 = H5Fopen(FILE1, H5F_ACC_RDONLY, H5P_DEFAULT);
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fid2 = H5Fopen(FILE2, H5F_ACC_RDONLY, H5P_DEFAULT);
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/*
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* Mount second file under G in the first file.
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*/
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H5Fmount(fid1, "/G", fid2, H5P_DEFAULT);
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/*
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* Access dataset D in the first file under /G/D name.
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*/
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did = H5Dopen(fid1,"/G/D");
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tid = H5Dget_type(did);
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status = H5Dread(did, tid, H5S_ALL, H5S_ALL, H5P_DEFAULT, bm_out);
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/*
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* Print out the data.
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*/
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for(i=0; i<NX; i++){
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for(j=0; j<NY; j++)
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printf(" %d", bm_out[i][j]);
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printf("\n");
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}
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/*
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* Close all identifers
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*/
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H5Tclose(tid);
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H5Dclose(did);
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/*
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* Unmounting second file
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*/
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H5Funmount(fid1, "/G");
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/*
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* Close both files
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*/
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H5Fclose(fid1);
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H5Fclose(fid2);
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return 0;
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}
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