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94 lines
3.5 KiB
C
94 lines
3.5 KiB
C
/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
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* Copyright by The HDF Group. *
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* Copyright by the Board of Trustees of the University of Illinois. *
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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 HDF5 document set and *
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* is 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 *
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* access to either file, you may request a copy from help@hdfgroup.org. *
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* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
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/*
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* Programmer: Raymond Lu
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* 13 February 2013
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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 <hdf5.h>
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static size_t H5Z_filter_dynlib1(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_DYNLIB1[1] = {{
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H5Z_CLASS_T_VERS, /* H5Z_class_t version */
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H5Z_FILTER_DYNLIB1, /* Filter id number */
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1, 1, /* Encoding and decoding enabled */
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"dynlib1", /* 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_dynlib1, /* The actual filter function */
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}};
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const H5PL_type_t H5PL_get_plugin_type(void) {return H5PL_TYPE_FILTER;}
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const H5Z_class2_t* H5PL_get_plugin_info(void) {return H5Z_DYNLIB1;}
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/*-------------------------------------------------------------------------
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* Function: H5Z_filter_dynlib1
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*
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* Purpose: A dynlib1 compression method that doesn't do anything.
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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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* Programmer: Robb Matzke
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* Tuesday, April 21, 1998
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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_dynlib1(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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/* 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]<0 || cd_values[0]>9)
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return(0);
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add_on = 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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}
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