1 files changed, 145 insertions, 0 deletions
diff --git a/doxygen/examples/H5A_examples.c b/doxygen/examples/H5A_examples.c
new file mode 100644
index 0000000..f332efa
--- /dev/null
+++ b/doxygen/examples/H5A_examples.c
@@ -0,0 +1,145 @@
+/* -*- c-file-style: "stroustrup" -*- */
+
+#include "hdf5.h"
+
+#include <stdio.h>
+#include <stdlib.h>
+
+int
+main(void)
+{
+    int ret_val = EXIT_SUCCESS;
+
+    //! <!-- [create] -->
+    {
+        __label__ fail_acpl, fail_attr, fail_file;
+        hid_t file, acpl, fspace, attr;
+
+        unsigned mode        = H5F_ACC_TRUNC;
+        char     file_name[] = "f1.h5";
+        // attribute names can be arbitrary Unicode strings
+        char attr_name[] = "Χαρακτηριστικό";
+
+        if ((file = H5Fcreate(file_name, mode, H5P_DEFAULT, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_file;
+        }
+        if ((acpl = H5Pcreate(H5P_ATTRIBUTE_CREATE)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_acpl;
+        }
+        // use UTF-8 encoding for the attribute name
+        if (H5Pset_char_encoding(acpl, H5T_CSET_UTF8) < 0) {
+            ret_val = EXIT_FAILURE;
+            goto fail_fspace;
+        }
+        // create a scalar (singleton) attribute
+        if ((fspace = H5Screate(H5S_SCALAR)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_fspace;
+        }
+        // create an attribute on the root group
+        if ((attr = H5Acreate2(file, attr_name, H5T_STD_I32LE, fspace, acpl, H5P_DEFAULT)) ==
+            H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_attr;
+        }
+
+        H5Aclose(attr);
+fail_attr:
+        H5Sclose(fspace);
+fail_fspace:
+        H5Pclose(acpl);
+fail_acpl:
+        H5Fclose(file);
+fail_file:;
+    }
+    //! <!-- [create] -->
+
+    //! <!-- [read] -->
+    {
+        __label__ fail_attr, fail_file;
+        hid_t file, attr;
+
+        unsigned mode        = H5F_ACC_RDONLY;
+        char     file_name[] = "f1.h5";
+        char     attr_name[] = "Χαρακτηριστικό";
+        int      value;
+
+        if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_file;
+        }
+        if ((attr = H5Aopen(file, attr_name, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_attr;
+        }
+        // read the attribute value
+        if (H5Aread(attr, H5T_NATIVE_INT, &value) < 0)
+            ret_val = EXIT_FAILURE;
+
+        // do something w/ the attribute value
+
+        H5Aclose(attr);
+fail_attr:
+        H5Fclose(file);
+fail_file:;
+    }
+    //! <!-- [read] -->
+
+    //! <!-- [update] -->
+    {
+        __label__ fail_attr, fail_file;
+        hid_t file, attr;
+
+        unsigned mode        = H5F_ACC_RDWR;
+        char     file_name[] = "f1.h5";
+        char     attr_name[] = "Χαρακτηριστικό";
+        int      value       = 1234;
+
+        if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_file;
+        }
+        if ((attr = H5Aopen(file, attr_name, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_attr;
+        }
+        // update the attribute value
+        if (H5Awrite(attr, H5T_NATIVE_INT, &value) < 0)
+            ret_val = EXIT_FAILURE;
+
+        H5Aclose(attr);
+fail_attr:
+        H5Fclose(file);
+fail_file:;
+    }
+    //! <!-- [update] -->
+
+    //! <!-- [delete] -->
+    {
+        __label__ fail_attr, fail_file;
+        hid_t file;
+
+        unsigned mode        = H5F_ACC_RDWR;
+        char     file_name[] = "f1.h5";
+        char     attr_name[] = "Χαρακτηριστικό";
+
+        if ((file = H5Fopen(file_name, mode, H5P_DEFAULT)) == H5I_INVALID_HID) {
+            ret_val = EXIT_FAILURE;
+            goto fail_file;
+        }
+        // delete the attribute
+        if (H5Adelete(file, attr_name) < 0) {
+            ret_val = EXIT_FAILURE;
+            goto fail_attr;
+        }
+
+fail_attr:
+        H5Fclose(file);
+fail_file:;
+    }
+    //! <!-- [delete] -->
+
+    return ret_val;
+}