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author | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
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committer | Daniel Baumann <daniel.baumann@progress-linux.org> | 2024-05-06 00:53:35 +0000 |
commit | 69c6a41ffb878ef98c9378ed4b1634a404cfaa7f (patch) | |
tree | b2a4f704565d62fbb129ab9dc3b35977c50e6e7f /src/libknot/db/db.h | |
parent | Initial commit. (diff) | |
download | knot-69c6a41ffb878ef98c9378ed4b1634a404cfaa7f.tar.xz knot-69c6a41ffb878ef98c9378ed4b1634a404cfaa7f.zip |
Adding upstream version 2.7.6.upstream/2.7.6upstream
Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>
Diffstat (limited to '')
-rw-r--r-- | src/libknot/db/db.h | 91 |
1 files changed, 91 insertions, 0 deletions
diff --git a/src/libknot/db/db.h b/src/libknot/db/db.h new file mode 100644 index 0000000..f3edc15 --- /dev/null +++ b/src/libknot/db/db.h @@ -0,0 +1,91 @@ +/* Copyright (C) 2017 CZ.NIC, z.s.p.o. <knot-dns@labs.nic.cz> + + This program is free software: you can redistribute it and/or modify + it under the terms of the GNU General Public License as published by + the Free Software Foundation, either version 3 of the License, or + (at your option) any later version. + + This program is distributed in the hope that it will be useful, + but WITHOUT ANY WARRANTY; without even the implied warranty of + MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + GNU General Public License for more details. + + You should have received a copy of the GNU General Public License + along with this program. If not, see <http://www.gnu.org/licenses/>. +*/ +/*! + * \file + * + * \brief Structures for binary data handling. + * + * \addtogroup db + * @{ + */ + +#pragma once + +#include "libknot/mm_ctx.h" + +enum { + /* Database flags */ + + KNOT_DB_RDONLY = 1 << 0, /*!< Read only. */ + KNOT_DB_SORTED = 1 << 1, /*!< Sorted output. */ + + /* Operations */ + + KNOT_DB_NOOP = 1 << 2, /*!< No operation. */ + KNOT_DB_FIRST = 1 << 3, /*!< First entry. */ + KNOT_DB_LAST = 1 << 4, /*!< Last entry. */ + KNOT_DB_NEXT = 1 << 5, /*!< Next entry. */ + KNOT_DB_PREV = 1 << 6, /*!< Previous entry. */ + KNOT_DB_LEQ = 1 << 7, /*!< Lesser or equal. */ + KNOT_DB_GEQ = 1 << 8 /*!< Greater or equal. */ +}; + +typedef void knot_db_t; +typedef void knot_db_iter_t; + +typedef struct knot_db_val { + void *data; + size_t len; +} knot_db_val_t; + +typedef struct knot_db_txn { + knot_db_t *db; + void *txn; +} knot_db_txn_t; + +typedef struct knot_db_api { + const char *name; + + /* Context operations */ + + int (*init)(knot_db_t **db, knot_mm_t *mm, void *opts); + void (*deinit)(knot_db_t *db); + + /* Transactions */ + + int (*txn_begin)(knot_db_t *db, knot_db_txn_t *txn, unsigned flags); + int (*txn_commit)(knot_db_txn_t *txn); + void (*txn_abort)(knot_db_txn_t *txn); + + /* Data access */ + + int (*count)(knot_db_txn_t *txn); + int (*clear)(knot_db_txn_t *txn); + int (*find)(knot_db_txn_t *txn, knot_db_val_t *key, knot_db_val_t *val, unsigned flags); + int (*insert)(knot_db_txn_t *txn, knot_db_val_t *key, knot_db_val_t *val, unsigned flags); + int (*del)(knot_db_txn_t *txn, knot_db_val_t *key); + + /* Iteration */ + + knot_db_iter_t *(*iter_begin)(knot_db_txn_t *txn, unsigned flags); + knot_db_iter_t *(*iter_seek)(knot_db_iter_t *iter, knot_db_val_t *key, unsigned flags); + knot_db_iter_t *(*iter_next)(knot_db_iter_t *iter); + int (*iter_key)(knot_db_iter_t *iter, knot_db_val_t *key); + int (*iter_val)(knot_db_iter_t *iter, knot_db_val_t *val); + void (*iter_finish)(knot_db_iter_t *iter); +} knot_db_api_t; + +/*! @} */ |