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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://www.hdfgroup.org/licenses. *
* If you do not have access to either file, you may request a copy from *
* help@hdfgroup.org. *
* * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * * */
/*
* Onion Virtual File Driver (VFD)
*
* Purpose: Interface for the onion file's history
*/
#ifndef H5FDonion_history_H
#define H5FDonion_history_H
/* Number of bytes to encode fixed-size components */
#define H5FD_ONION_ENCODED_SIZE_HISTORY 20
#define H5FD_ONION_HISTORY_SIGNATURE "OWHS"
#define H5FD_ONION_HISTORY_VERSION_CURR 1
/* In-memory representation of the on-store revision record.
* Used in the history.
*/
typedef struct H5FD_onion_record_loc_t {
haddr_t phys_addr;
hsize_t record_size;
uint32_t checksum;
} H5FD_onion_record_loc_t;
/* In-memory representation of the on-store history record/summary.
*/
typedef struct H5FD_onion_history_t {
uint8_t version;
uint64_t n_revisions;
H5FD_onion_record_loc_t *record_locs;
uint32_t checksum;
} H5FD_onion_history_t;
#ifdef __cplusplus
extern "C" {
#endif
H5_DLL herr_t H5FD__onion_ingest_history(H5FD_onion_history_t *history_out, H5FD_t *raw_file, haddr_t addr,
haddr_t size);
H5_DLL uint64_t H5FD__onion_write_history(H5FD_onion_history_t *history, H5FD_t *file, haddr_t off_start,
haddr_t filesize_curr);
H5_DLL size_t H5FD__onion_history_decode(unsigned char *buf, H5FD_onion_history_t *history);
H5_DLL size_t H5FD__onion_history_encode(H5FD_onion_history_t *history, unsigned char *buf,
uint32_t *checksum);
#ifdef __cplusplus
}
#endif
#endif /* H5FDonion_history_H */
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