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Diffstat (limited to 'test/filter_plugin3_dsets.c')
-rw-r--r-- | test/filter_plugin3_dsets.c | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/test/filter_plugin3_dsets.c b/test/filter_plugin3_dsets.c new file mode 100644 index 0000000..b43020f --- /dev/null +++ b/test/filter_plugin3_dsets.c @@ -0,0 +1,119 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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. + * This filter makes an HDF5 API call to ensure that works correctly. + */ + +#include <stdlib.h> +#include <stdio.h> + +#include "H5PLextern.h" + +#define FILTER3_ID 259 + +#define PUSH_ERR(func, minor, str) H5Epush2(H5E_DEFAULT, __FILE__, func, __LINE__, H5E_ERR_CLS, H5E_PLUGIN, minor, str) + +static size_t add_sub_value_hdf5(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 */ + FILTER3_ID, /* Filter ID number */ + 1, /* Encoding enabled */ + 1, /* Decoding enabled */ + "test filter plugin 3", /* Filter name for debugging */ + NULL, /* The "can apply" callback */ + NULL, /* The "set local" callback */ + (H5Z_func_t)add_sub_value_hdf5, /* 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: add_sub_value_hdf5 + * + * Purpose: On write: + * Adds a caller-supplied value to the element + * On read: + * Subtracts a caller-supplied value from the element + * + * NOTE: This filter is identical to filter #1 only it makes + * an HDF5 library call to ensure doing that doesn't + * cause problems. + * + * Return: Success: Data chunk size in bytes + * Failure: 0 + * + *------------------------------------------------------------------------- + */ +static size_t +add_sub_value_hdf5(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 value = 0; /* Data value to add/subtract */ + unsigned majnum = 0; /* Output data from the HDF5 library call */ + unsigned minnum = 0; + unsigned relnum = 0; + + /* Check for the library version. + * We don't do anything with this information - it's just to ensure that + * HDF5 library calls work properly from inside filter plugins. + */ + if (H5get_libversion(&majnum, &minnum, &relnum) < 0) { + PUSH_ERR("filter plugin 3", 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; + + /* Ensure that the version numbers match what was passed in. + * Again, this is trivial work, just to ensure that the library calls are + * working properly. + */ + if (majnum != cd_values[1] || minnum != cd_values[2]) { + PUSH_ERR("filter plugin 3", H5E_CALLBACK, "library versions do not match"); + return 0; + } + + value = (int)cd_values[0]; + + if (flags & H5Z_FLAG_REVERSE) { + /* READ - Substract the given value from all the data values */ + while (buf_left > 0) { + *int_ptr++ -= value; + buf_left -= sizeof(int); + } + } + else { + /* WRITE - Add the given value to all the data values */ + while (buf_left > 0) { + *int_ptr++ += value; + buf_left -= sizeof(int); + } + } + + return nbytes; +} /* end add_sub_value_hdf5() */ + |