+/* mdb.h - memory-mapped database library header file */
+/*
+ * Copyright 2011 Howard Chu, Symas Corp.
+ * All rights reserved.
+ *
+ * Redistribution and use in source and binary forms, with or without
+ * modification, are permitted only as authorized by the OpenLDAP
+ * Public License.
+ *
+ * A copy of this license is available in the file LICENSE in the
+ * top-level directory of the distribution or, alternatively, at
+ * <http://www.OpenLDAP.org/license.html>.
+ *
+ * This code is derived from btree.c written by Martin Hedenfalk.
+ *
+ * Copyright (c) 2009, 2010 Martin Hedenfalk <martin@bzero.se>
+ *
+ * Permission to use, copy, modify, and distribute this software for any
+ * purpose with or without fee is hereby granted, provided that the above
+ * copyright notice and this permission notice appear in all copies.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES
+ * WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF
+ * MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR
+ * ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES
+ * WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN
+ * ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF
+ * OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
+ */
#ifndef _MDB_H_
#define _MDB_H_
#include <sys/types.h>
+#define MDB_VERSION_MAJOR 0
+#define MDB_VERSION_MINOR 8
+#define MDB_VERSION_PATCH 0
+#define MDB_VERINT(a,b,c) (((a) << 24) | ((b) << 16) | (c))
+#define MDB_VERSION_FULL \
+ MDB_VERINT(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH)
+#define MDB_VERSION_DATE "August 11, 2011"
+#define MDB_VERSTR(a,b,c,d) "MDB " #a "." #b "." #c ": (" #d ")"
+#define MDB_VERFOO(a,b,c,d) MDB_VERSTR(a,b,c,d)
+#define MDB_VERSION_STRING \
+ MDB_VERFOO(MDB_VERSION_MAJOR,MDB_VERSION_MINOR,MDB_VERSION_PATCH,MDB_VERSION_DATE)
+
struct MDB_cursor;
struct MDB_txn;
struct MDB_env;
typedef unsigned int MDB_dbi;
typedef struct MDB_val {
- void *mv_data;
size_t mv_size;
+ void *mv_data;
} MDB_val;
typedef int (MDB_cmp_func)(const MDB_val *a, const MDB_val *b);
typedef void (MDB_rel_func)(void *ptr, void *oldptr);
-#define MDB_NOOVERWRITE 1
+#define MDB_NOOVERWRITE 0x10
+#define MDB_NODUPDATA 0x20
+#define MDB_DEL_DUP 0x40
typedef enum MDB_cursor_op { /* cursor operations */
- MDB_CURSOR, /* position at given key */
- MDB_CURSOR_EXACT, /* position at key, or fail */
MDB_FIRST,
+ MDB_GET_BOTH, /* position at key/data */
+ MDB_GET_BOTH_RANGE, /* position at key, nearest data */
+ MDB_GET_MULTIPLE, /* only for MDB_DUPFIXED */
+ MDB_LAST,
MDB_NEXT,
- MDB_LAST, /* not implemented */
- MDB_PREV /* not implemented */
+ MDB_NEXT_DUP,
+ MDB_NEXT_MULTIPLE, /* only for MDB_DUPFIXED */
+ MDB_NEXT_NODUP,
+ MDB_PREV,
+ MDB_PREV_DUP,
+ MDB_PREV_NODUP,
+ MDB_SET, /* position at key, or fail */
+ MDB_SET_RANGE /* position at given key */
} MDB_cursor_op;
/* return codes */
-#define MDB_FAIL -1
+/* BerkeleyDB uses -30800 to -30999, we'll go under them */
#define MDB_SUCCESS 0
+#define MDB_KEYEXIST (-30799) /* key/data pair already exists */
+#define MDB_NOTFOUND (-30798) /* key/data pair not found (EOF) */
+#define MDB_PAGE_NOTFOUND (-30797) /* Requested page not found */
+#define MDB_CORRUPTED (-30796) /* Located page was wrong type */
+#define MDB_PANIC (-30795) /* Update of meta page failed, probably I/O error */
+#define MDB_VERSION_MISMATCH (-30794) /* Environment version mismatch */
/* DB flags */
#define MDB_REVERSEKEY 0x02 /* use reverse string keys */
-#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
-#define MDB_RDONLY 0x20000 /* read only */
-#define MDB_CREATE 0x40000 /* create if not present */
+#define MDB_DUPSORT 0x04 /* use sorted duplicates */
+#define MDB_INTEGERKEY 0x08 /* numeric keys in native byte order */
+#define MDB_DUPFIXED 0x10 /* sorted dup items have fixed size */
+#define MDB_INTEGERDUP 0x20 /* numeric dups in native byte order */
/* environment flags */
#define MDB_FIXEDMAP 0x01 /* mmap at a fixed address */
+#define MDB_NOSYNC 0x10000 /* don't fsync after commit */
+#define MDB_RDONLY 0x20000 /* read only */
+
+/* DB or env flags */
+#define MDB_CREATE 0x40000 /* create if not present */
typedef struct MDB_stat {
unsigned int ms_psize;
unsigned long ms_entries;
} MDB_stat;
-int mdbenv_create(MDB_env **env);
-int mdbenv_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
-int mdbenv_stat(MDB_env *env, MDB_stat *stat);
-void mdbenv_close(MDB_env *env);
-int mdbenv_get_flags(MDB_env *env, unsigned int *flags);
-int mdbenv_get_path(MDB_env *env, const char **path);
-int mdbenv_set_mapsize(MDB_env *env, size_t size);
-int mdbenv_set_maxreaders(MDB_env *env, int readers);
-int mdbenv_get_maxreaders(MDB_env *env, int *readers);
-int mdbenv_sync(MDB_env *env);
+char *mdb_version(int *major, int *minor, int *patch);
+char *mdb_strerror(int err);
+int mdb_env_create(MDB_env **env);
+int mdb_env_open(MDB_env *env, const char *path, unsigned int flags, mode_t mode);
+int mdb_env_stat(MDB_env *env, MDB_stat *stat);
+int mdb_env_sync(MDB_env *env, int force);
+void mdb_env_close(MDB_env *env);
+int mdb_env_set_flags(MDB_env *env, unsigned int flags, int onoff);
+int mdb_env_get_flags(MDB_env *env, unsigned int *flags);
+int mdb_env_get_path(MDB_env *env, const char **path);
+int mdb_env_set_mapsize(MDB_env *env, size_t size);
+int mdb_env_set_maxreaders(MDB_env *env, int readers);
+int mdb_env_get_maxreaders(MDB_env *env, int *readers);
+int mdb_env_set_maxdbs(MDB_env *env, int dbs);
int mdb_txn_begin(MDB_env *env, int rdonly, MDB_txn **txn);
int mdb_txn_commit(MDB_txn *txn);
int mdb_stat(MDB_txn *txn, MDB_dbi dbi, MDB_stat *stat);
void mdb_close(MDB_txn *txn, MDB_dbi dbi);
+int mdb_set_compare(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
+int mdb_set_dupsort(MDB_txn *txn, MDB_dbi dbi, MDB_cmp_func *cmp);
+int mdb_set_relfunc(MDB_txn *txn, MDB_dbi dbi, MDB_rel_func *rel);
+
int mdb_get(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
int mdb_put(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
unsigned int flags);
-int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data);
+int mdb_del(MDB_txn *txn, MDB_dbi dbi, MDB_val *key, MDB_val *data,
+ unsigned int flags);
int mdb_cursor_open(MDB_txn *txn, MDB_dbi dbi, MDB_cursor **cursor);
void mdb_cursor_close(MDB_cursor *cursor);
int mdb_cursor_get(MDB_cursor *cursor, MDB_val *key, MDB_val *data,
MDB_cursor_op op);
+int mdb_cursor_count(MDB_cursor *cursor, unsigned long *countp);
int mdb_cmp(MDB_txn *txn, MDB_dbi dbi, const MDB_val *a, const MDB_val *b);
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