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Diffstat (limited to 'test/filter_plugin4_groups.c')
-rw-r--r-- | test/filter_plugin4_groups.c | 106 |
1 files changed, 106 insertions, 0 deletions
diff --git a/test/filter_plugin4_groups.c b/test/filter_plugin4_groups.c new file mode 100644 index 0000000..88ea20d --- /dev/null +++ b/test/filter_plugin4_groups.c @@ -0,0 +1,106 @@ +/* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * + * 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 group filter plugin for the filter_pluging.c test. + */ + +#include <stdlib.h> +#include <stdio.h> +#include <string.h> + +#include "H5PLextern.h" + +#define FILTER4_ID 260 +#define SUFFIX_LEN 8 +#define GROUP_SUFFIX ".h5group" + +static size_t append_to_group_name(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 */ + FILTER4_ID, /* Filter ID number */ + 1, /* Encoding enabled */ + 1, /* Decoding enabled */ + "test filter plugin 4", /* Filter name for debugging */ + NULL, /* The "can apply" callback */ + NULL, /* The "set local" callback */ + (H5Z_func_t)append_to_group_name, /* 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: append_to_group_name + * + * Purpose: On write: + * Appends the suffix ".h5group" to the group name + * On read: + * Removes the ".h5group" suffix from the group name + * + * Return: Success: Data size in bytes + * Failure: 0 + * + *------------------------------------------------------------------------- + */ +static size_t +append_to_group_name(unsigned int flags, size_t cd_nelmts, + const unsigned int *cd_values, size_t nbytes, size_t *buf_size, void **buf) +{ + size_t new_name_size = 0; /* Return value */ + + /* 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 - Remove the suffix from the group name */ + new_name_size = *buf_size = nbytes - SUFFIX_LEN; + } + else { + /* WRITE - Append the suffix to the group name */ + void *outbuf = NULL; /* Pointer to new buffer */ + unsigned char *dst = NULL; /* Temporary pointer to destination buffer */ + + /* Get memory for the new, larger string buffer using the + * library's memory allocator. + */ + if (NULL == (dst = (unsigned char *)(outbuf = H5allocate_memory(nbytes + SUFFIX_LEN, 0)))) + return 0; + + /* Copy raw data */ + memcpy((void *)dst, (const void *)(*buf), nbytes); + + /* Append suffix to raw data for storage */ + dst += nbytes; + memcpy((void *)dst, (const void *)GROUP_SUFFIX, SUFFIX_LEN); + + /* Free the passed-in buffer using the library's allocator */ + H5free_memory(*buf); + + /* Set return values */ + *buf_size = nbytes + SUFFIX_LEN; + *buf = outbuf; + outbuf = NULL; + new_name_size = *buf_size; + } + + return new_name_size; +} /* append_to_group_name() */ + |