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Diffstat (limited to 'test/filter_plugin2_dsets.c')
-rw-r--r-- | test/filter_plugin2_dsets.c | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/test/filter_plugin2_dsets.c b/test/filter_plugin2_dsets.c new file mode 100644 index 0000000..6a79148 --- /dev/null +++ b/test/filter_plugin2_dsets.c @@ -0,0 +1,88 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 COPYING file, which can be found at the root of the source code * + * distribution tree, or in https://support.hdfgroup.org/ftp/HDF5/releases. * + * If you do not have access to either file, you may request a copy from * + * help@hdfgroup.org. * + * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */ + +/* + * Purpose: Test dataset filter plugin for the filter_pluging.c test. + */ + +#include <stdlib.h> +#include <stdio.h> + +#include "H5PLextern.h" + +#define FILTER2_ID 258 +#define MULTIPLIER 3 + +static size_t mult_div_value(unsigned int flags, size_t cd_nelmts, + const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf); + +/* Filter class struct */ +const H5Z_class2_t FILTER_INFO[1] = {{ + H5Z_CLASS_T_VERS, /* H5Z_class_t version */ + FILTER2_ID, /* Filter ID number */ + 1, /* Encoding enabled */ + 1, /* Decoding enabled */ + "test filter plugin 2", /* Filter name for debugging */ + NULL, /* The "can apply" callback */ + NULL, /* The "set local" callback */ + (H5Z_func_t)mult_div_value, /* The actual filter function */ +}}; + +H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;} +const void *H5PLget_plugin_info(void) {return FILTER_INFO;} + + +/*------------------------------------------------------------------------- + * Function: mult_div_value + * + * Purpose: On write: + * Multiplies an element by a constant value. + * On read: + * Divides an element by a constant value. + * + * Return: Success: Data chunk size in bytes + * Failure: 0 + * + *------------------------------------------------------------------------- + */ +static size_t +mult_div_value(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 by MULTIPLIER */ + while (buf_left > 0) { + *int_ptr++ /= MULTIPLIER; + buf_left -= sizeof(int); + } + } + else { + /* WRITE - Multiply the original value by MULTIPLIER */ + while (buf_left > 0) { + *int_ptr++ *= MULTIPLIER; + buf_left -= sizeof(int); + } + } + + return nbytes; +} /* end mult_div_value() */ + |