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/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * *
* 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: Tests the plugin module (H5PL)
*/
#include <stdlib.h>
#include <stdio.h>
#include "H5PLextern.h"
#define H5Z_FILTER_DYNLIB4 260
#define PUSH_ERR(func, minor, str) H5Epush2(H5E_DEFAULT, __FILE__, func, __LINE__, H5E_ERR_CLS, H5E_PLUGIN, minor, str)
static size_t H5Z_filter_dynlib4(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_DYNLIB4[1] = {{
H5Z_CLASS_T_VERS, /* H5Z_class_t version */
H5Z_FILTER_DYNLIB4, /* Filter id number */
1, 1, /* Encoding and decoding enabled */
"dynlib4", /* Filter name for debugging */
NULL, /* The "can apply" callback */
NULL, /* The "set local" callback */
(H5Z_func_t)H5Z_filter_dynlib4, /* The actual filter function */
}};
H5PL_type_t H5PLget_plugin_type(void) {return H5PL_TYPE_FILTER;}
const void *H5PLget_plugin_info(void) {return H5Z_DYNLIB4;}
/*-------------------------------------------------------------------------
* Function: H5Z_filter_dynlib4
*
* Purpose: A dynlib4 filter method that adds on and subtract from
* the original value with another value. It will be built
* as a shared library. plugin.c test will load and use
* this filter library. Designed to call a HDF function.
*
* Return: Success: Data chunk size
*
* Failure: 0
*
*-------------------------------------------------------------------------
*/
static size_t
H5Z_filter_dynlib4(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 */
int add_on = 0;
unsigned ver_info[3];
/* Check for the library version */
if(H5get_libversion(&ver_info[0], &ver_info[1], &ver_info[2]) < 0) {
PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion");
return(0);
}
/* Check for the correct number of parameters */
if(cd_nelmts == 0)
return(0);
/* Check that permanent parameters are set correctly */
if(cd_values[0] > 9)
return(0);
if(ver_info[0] != cd_values[1] || ver_info[1] != cd_values[2]) {
PUSH_ERR("dynlib4", H5E_CALLBACK, "H5get_libversion does not match");
return(0);
}
add_on = (int)cd_values[0];
if(flags & H5Z_FLAG_REVERSE) { /*read*/
/* Substract the "add on" value to all the data values */
while(buf_left > 0) {
*int_ptr++ -= add_on;
buf_left -= sizeof(int);
} /* end while */
} /* end if */
else { /*write*/
/* Add the "add on" value to all the data values */
while(buf_left > 0) {
*int_ptr++ += add_on;
buf_left -= sizeof(int);
} /* end while */
} /* end else */
return nbytes;
} /* end H5Z_filter_dynlib4() */
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