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+/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
+ * Copyright by The HDF Group. *
+ * 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 files COPYING and Copyright.html. COPYING can be found at the root *
+ * of the source code distribution tree; Copyright.html can be found at the *
+ * root level of an installed copy of the electronic document set and is *
+ * linked from the top-level documents page. It can also be found at *
+ * http://hdfgroup.org/HDF5/doc/Copyright.html. If you do not have access *
+ * to either file, you may request a copy from help@hdfgroup.org. *
+ * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
+/*
+ * Purpose: Tests the plugin module (H5PL)
+ */
+
+#include <stdlib.h>
+#include <stdio.h>
+#include "H5PLextern.h"
+
+#define H5Z_FILTER_DYNLIB4 260
+
+#define PUSH_ERR(func, minor, str) H5Epush2(H5E_DEFAULT, __FILE__, func, __LINE__, H5E_ERR_CLS, H5E_PLUGIN, minor, str)
+
+static size_t H5Z_filter_dynlib4(unsigned int flags, size_t cd_nelmts,
+ const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf);
+
+/* This message derives from H5Z */
+const H5Z_class2_t H5Z_DYNLIB4[1] = {{
+ H5Z_CLASS_T_VERS, /* H5Z_class_t version */
+ H5Z_FILTER_DYNLIB4, /* Filter id number */
+ 1, 1, /* Encoding and decoding enabled */
+ "dynlib4", /* Filter name for debugging */
+ NULL, /* The "can apply" callback */
+ NULL, /* The "set local" callback */
+ (H5Z_func_t)H5Z_filter_dynlib4, /* The actual filter function */
+}};
+
+H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
+const void *H5PLget_plugin_info(void) {return H5Z_DYNLIB4;}
+
+/*-------------------------------------------------------------------------
+ * Function: H5Z_filter_dynlib4
+ *
+ * Purpose: A dynlib4 filter method that adds on and subtract from
+ * the original value with another value. It will be built
+ * as a shared library. plugin.c test will load and use
+ * this filter library. Designed to call a HDF function.
+ *
+ * Return: Success: Data chunk size
+ *
+ * Failure: 0
+ *
+ *-------------------------------------------------------------------------
+ */
+static size_t
+H5Z_filter_dynlib4(unsigned int flags, size_t cd_nelmts,
+ const unsigned int *cd_values, size_t nbytes,
+ size_t *buf_size, void **buf)
+{
+ int *int_ptr = (int *)*buf; /* Pointer to the data values */
+ size_t buf_left = *buf_size; /* Amount of data buffer left to process */
+ int add_on = 0;
+ unsigned ver_info[3];
+
+ /* Check for the library version */
+ if(H5get_libversion(&ver_info[0], &ver_info[1], &ver_info[2]) < 0) {
+ PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion");
+ return(0);
+ }
+ /* Check for the correct number of parameters */
+ if(cd_nelmts == 0)
+ return(0);
+
+ /* Check that permanent parameters are set correctly */
+ if(cd_values[0] > 9)
+ return(0);
+
+ if(ver_info[0] != cd_values[1] || ver_info[1] != cd_values[2]) {
+ PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion does not match");
+ return(0);
+ }
+
+ add_on = (int)cd_values[0];
+
+ if(flags & H5Z_FLAG_REVERSE) { /*read*/
+ /* Substract the "add on" value to all the data values */
+ while(buf_left > 0) {
+ *int_ptr++ -= add_on;
+ buf_left -= sizeof(int);
+ } /* end while */
+ } /* end if */
+ else { /*write*/
+ /* Add the "add on" value to all the data values */
+ while(buf_left > 0) {
+ *int_ptr++ += add_on;
+ buf_left -= sizeof(int);
+ } /* end while */
+ } /* end else */
+
+ return nbytes;
+} /* end H5Z_filter_dynlib4() */
+