hdf5

userland/libs/hdf5/hello_cpp.cpp

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+// Adapted from: https://support.hdfgroup.org/HDF5/doc/cpplus_RM/create_8cpp-example.html
+
+#include <iostream>
+#include <string>
+
+#include <H5Cpp.h>
+
+using namespace H5;
+
+const H5std_string FILE_NAME("hello_cpp.tmp.h5");
+const H5std_string DATASET_NAME("IntArray");
+const int NX = 5;
+const int NY = 6;
+const int RANK = 2;
+
+int main (void) {
+    // 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
+    int i, j;
+    int data[NX][NY];
+    for (j = 0; j < NX; j++) {
+        for (i = 0; i < NY; i++)
+        data[j][i] = i + j;
+    }
+
+    //Create a new file using H5F_ACC_TRUNC access,
+    //default file creation properties, and default file
+    //access properties.
+    H5File file(FILE_NAME, H5F_ACC_TRUNC);
+
+    // Define the size of the array and create the data space for fixed
+    // size dataset.
+    hsize_t dimsf[2];
+    dimsf[0] = NX;
+    dimsf[1] = NY;
+    DataSpace dataspace(RANK, dimsf);
+
+    // Define datatype for the data in the file.
+    // We will store little endian INT numbers.
+    IntType datatype(PredType::NATIVE_INT);
+    datatype.setOrder(H5T_ORDER_LE);
+
+    // Create a new dataset within the file using defined dataspace and
+    // datatype and default dataset creation properties.
+    DataSet dataset = file.createDataSet(DATASET_NAME, datatype, dataspace);
+
+    // Write the data to the dataset using default memory space, file
+    // space, and transfer properties.
+    dataset.write(data, PredType::NATIVE_INT);
+    return 0;
+}