/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * 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. * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ /* * Programmer: Raymond Lu * 13 February 2013 * * Purpose: Tests the plugin module (H5PL) */ #include <stdlib.h> #include <stdio.h> #include "H5PLextern.h" #define H5Z_FILTER_DYNLIB2 258 #define MULTIPLIER 3 static size_t H5Z_filter_dynlib2(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_DYNLIB2[1] = {{ H5Z_CLASS_T_VERS, /* H5Z_class_t version */ H5Z_FILTER_DYNLIB2, /* Filter id number */ 1, 1, /* Encoding and decoding enabled */ "dynlib2", /* Filter name for debugging */ NULL, /* The "can apply" callback */ NULL, /* The "set local" callback */ (H5Z_func_t)H5Z_filter_dynlib2, /* The actual filter function */ }}; H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;} const void *H5PLget_plugin_info(void) {return H5Z_DYNLIB2;} /*------------------------------------------------------------------------- * Function: H5Z_filter_dynlib2 * * Purpose: A dynlib2 filter method that multiplies the original value * during write and divide the original value during read. It * will be built as a shared library. plugin.c test will load * and use this filter library. * * Return: Success: Data chunk size * * Failure: 0 * * Programmer: Raymond Lu * 29 March 2013 * *------------------------------------------------------------------------- */ static size_t H5Z_filter_dynlib2(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 */ /* Check for the correct number of parameters */ if(cd_nelmts > 0) return(0); /* Assignment to eliminate unused parameter warning. */ cd_values = cd_values; if(flags & H5Z_FLAG_REVERSE) { /*read*/ /* Divide the original value with MULTIPLIER */ while(buf_left > 0) { *int_ptr++ /= MULTIPLIER; buf_left -= sizeof(int); } /* end while */ } /* end if */ else { /*write*/ /* Multiply the original value with MULTIPLIER */ while(buf_left > 0) { *int_ptr++ *= MULTIPLIER; buf_left -= sizeof(int); } /* end while */ } /* end else */ return nbytes; } /* end H5Z_filter_dynlib2() */