Merge branch 'develop' into feature/coding_standardsfeature/coding_standards

1 files changed, 108 insertions, 0 deletions

diff --git a/doxygen/examples/H5Z_examples.c b/doxygen/examples/H5Z_examples.c
new file mode 100644
index 0000000..28a1ea2
--- /dev/null
+++ b/doxygen/examples/H5Z_examples.c
@@ -0,0 +1,108 @@
+/* -*- c-file-style: "stroustrup" -*- */
+
+#include "hdf5.h"
+
+#include <assert.h>
+#include <stdio.h>
+#include <stdlib.h>
+
+//! <!-- [filter] -->
+size_t
+filter(unsigned int flags, size_t cd_nelmts, const unsigned int cd_values[], size_t nbytes, size_t *buf_size,
+       void **buf)
+{
+    buf_size = 0;
+
+    if (flags & H5Z_FLAG_REVERSE) {
+        // read data, e.g., decompress data
+        // ...
+    }
+    else {
+        // write data, e.g., compress data
+        // ...
+    }
+
+    return nbytes;
+}
+//! <!-- [filter] -->
+
+int
+main(void)
+{
+    int ret_val = EXIT_SUCCESS;
+
+    //! <!-- [create] -->
+    {
+        __label__ fail_register;
+        H5Z_class_t cls;
+        cls.version         = H5Z_CLASS_T_VERS;
+        cls.id              = 256;
+        cls.encoder_present = 1;
+        cls.decoder_present = 1;
+        cls.name            = "Identity filter";
+        cls.can_apply       = NULL;
+        cls.set_local       = NULL;
+        cls.filter          = &filter;
+
+        // register the filter
+        if (H5Zregister(&cls) < 0) {
+            ret_val = EXIT_FAILURE;
+            goto fail_register;
+        }
+
+        // do something with filter
+        // ...
+
+        // unregister the filter if no longer required
+        // ...
+
+fail_register:;
+    }
+    //! <!-- [create] -->
+
+    //! <!-- [read] -->
+    {
+        __label__ fail_avail;
+
+        H5Z_filter_t flt   = H5Z_FILTER_DEFLATE;
+        unsigned     flags = 0;
+
+        // check if the deflate filter is available
+        if (H5Zfilter_avail(flt) < 0) {
+            ret_val = EXIT_FAILURE;
+            goto fail_avail;
+        }
+        // retrieve the deflate filter info
+        if (H5Zget_filter_info(flt, &flags) < 0) {
+            ret_val = EXIT_FAILURE;
+            goto fail_avail;
+        }
+
+        // check if the deflate encoder or decoder is enabled
+        if (H5Z_FILTER_CONFIG_ENCODE_ENABLED & flags)
+            printf("Deflate encoder enabled.\n");
+        if (H5Z_FILTER_CONFIG_DECODE_ENABLED & flags)
+            printf("Deflate decoder enabled.\n");
+
+fail_avail:;
+    }
+    //! <!-- [read] -->
+
+    //! <!-- [update] -->
+    {
+        // N/A
+    } //! <!-- [update] -->
+
+    //! <!-- [delete] -->
+    {
+        // unregister the identity filter
+        if (H5Zunregister(256) < 0) {
+            ret_val = EXIT_FAILURE;
+        }
+    }
+    //! <!-- [delete] -->
+
+    assert(ret_val == EXIT_SUCCESS);
+
+    return ret_val;
+}