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Diffstat (limited to 'tools/h5dump/dynlib_dump.c')
-rw-r--r-- | tools/h5dump/dynlib_dump.c | 94 |
1 files changed, 94 insertions, 0 deletions
diff --git a/tools/h5dump/dynlib_dump.c b/tools/h5dump/dynlib_dump.c new file mode 100644 index 0000000..0d8be2b --- /dev/null +++ b/tools/h5dump/dynlib_dump.c @@ -0,0 +1,94 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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() */ + |