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