hdf5写文件的一个官方实例

￡神魔★判官ぃ 2022-12-11 13:43 167阅读 0赞

# 将一个二维数组先写成.h5格式的文件 #

/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
     * Copyright by The HDF Group.                                               *
     * Copyright by the Board of Trustees of the University of Illinois.         *
     * All rights reserved.                                                      *
     *                                                                           *
     * This file is part of HDF5.  The full HDF5 copyright notice, including     *
     * terms governing use, modification, and redistribution, is contained in    *
     * the COPYING file, which can be found at the root of the source code       *
     * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases.  *
     * If you do not have access to either file, you may request a copy from     *
     * help@hdfgroup.org.                                                        *
     * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
    
    /*
     *  This example writes data to the HDF5 file.
     *  Data conversion is performed during write operation.
     */
    
    #include "hdf5.h"
    
    #define H5FILE_NAME        "SDS.h5"
    #define DATASETNAME "IntArray"
    #define NX     5                      /* dataset dimensions */
    #define NY     6
    #define RANK   2
    
    int
    main (void)
    {
        hid_t       file, dataset;         /* file and dataset handles */
        hid_t       datatype, dataspace;   /* handles */
        hsize_t     dimsf[2];              /* dataset dimensions */
        herr_t      status;
        int         data[NX][NY];          /* data to write */
        int         i, j;
    
        /*
         * Data  and output buffer initialization.
         */
        for(j = 0; j < NX; j++)
    	for(i = 0; i < NY; i++)
    	    data[j][i] = i + j;
        /*
         * 0 1 2 3 4 5
         * 1 2 3 4 5 6
         * 2 3 4 5 6 7
         * 3 4 5 6 7 8
         * 4 5 6 7 8 9
         */
    
        /*
         * Create a new file using H5F_ACC_TRUNC access,
         * default file creation properties, and default file
         * access properties.
         */
        file = H5Fcreate(H5FILE_NAME, H5F_ACC_TRUNC, H5P_DEFAULT, H5P_DEFAULT);
    
        /*
         * Describe the size of the array and create the data space for fixed
         * size dataset.
         */
        dimsf[0] = NX;
        dimsf[1] = NY;
        dataspace = H5Screate_simple(RANK, dimsf, NULL);
    
        /*
         * Define datatype for the data in the file.
         * We will store little endian INT numbers.
         */
        datatype = H5Tcopy(H5T_NATIVE_INT);
        status = H5Tset_order(datatype, H5T_ORDER_LE);
    
        /*
         * Create a new dataset within the file using defined dataspace and
         * datatype and default dataset creation properties.
         */
        dataset = H5Dcreate2(file, DATASETNAME, datatype, dataspace,
    			H5P_DEFAULT, H5P_DEFAULT, H5P_DEFAULT);
    
        /*
         * Write the data to the dataset using default transfer properties.
         */
        status = H5Dwrite(dataset, H5T_NATIVE_INT, H5S_ALL, H5S_ALL, H5P_DEFAULT, data);
    
        /*
         * Close/release resources.
         */
        H5Sclose(dataspace);
        H5Tclose(datatype);
        H5Dclose(dataset);
        H5Fclose(file);
    
        return 0;
    }

# Cmakelist.txt #

cmake_minimum_required(VERSION 2.6)
    project(testhdf5)
    
    include_directories("/usr/local/hdf5/include")
    LINK_DIRECTORIES("/usr/local/hdf5/lib")
    LINK_LIBRARIES(hdf5 hdf5_hl)
    
    add_executable(testhdf5 main.cpp)
    
    install(TARGETS testhdf5 RUNTIME DESTINATION bin)