/** @file midl.h
- * @brief ldap bdb back-end ID List header file.
+ * @brief mdb ID List header file.
*
* This file was originally part of back-bdb but has been
* modified for use in libmdb. Most of the macros defined
/* $OpenLDAP$ */
/* This work is part of OpenLDAP Software <http://www.openldap.org/>.
*
- * Copyright 2000-2011 The OpenLDAP Foundation.
+ * Copyright 2000-2012 The OpenLDAP Foundation.
* All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
#include <stddef.h>
+#ifdef __cplusplus
+extern "C" {
+#endif
+
/** @defgroup internal MDB Internals
* @{
*/
* @{
*/
/** A generic ID number. These were entryIDs in back-bdb.
- * It should be the largest integer type supported on a machine.
- * It should be equal to the size of a pointer.
+ * Preferably it should have the same size as a pointer.
*/
-typedef size_t ID;
+typedef size_t MDB_ID;
/** An IDL is an ID List, a sorted array of IDs. The first
* element of the array is a counter for how many actual
* sorted in ascending order. For libmdb IDLs are sorted in
* descending order.
*/
-typedef ID *IDL;
+typedef MDB_ID *MDB_IDL;
-#define NOID (~(ID)0)
+#define MDB_NOID (~(MDB_ID)0)
/* IDL sizes - likely should be even bigger
* limiting factors: sizeof(ID), thread stack size
#define MDB_IDL_LOGN 16 /* DB_SIZE is 2^16, UM_SIZE is 2^17 */
#define MDB_IDL_DB_SIZE (1<<MDB_IDL_LOGN)
#define MDB_IDL_UM_SIZE (1<<(MDB_IDL_LOGN+1))
-#define MDB_IDL_UM_SIZEOF (MDB_IDL_UM_SIZE * sizeof(ID))
+#define MDB_IDL_UM_SIZEOF (MDB_IDL_UM_SIZE * sizeof(MDB_ID))
#define MDB_IDL_DB_MAX (MDB_IDL_DB_SIZE-1)
#define MDB_IDL_UM_MAX (MDB_IDL_UM_SIZE-1)
-#define MDB_IDL_IS_RANGE(ids) ((ids)[0] == NOID)
+#define MDB_IDL_IS_RANGE(ids) ((ids)[0] == MDB_NOID)
#define MDB_IDL_RANGE_SIZE (3)
-#define MDB_IDL_RANGE_SIZEOF (MDB_IDL_RANGE_SIZE * sizeof(ID))
+#define MDB_IDL_RANGE_SIZEOF (MDB_IDL_RANGE_SIZE * sizeof(MDB_ID))
#define MDB_IDL_SIZEOF(ids) ((MDB_IDL_IS_RANGE(ids) \
- ? MDB_IDL_RANGE_SIZE : ((ids)[0]+1)) * sizeof(ID))
+ ? MDB_IDL_RANGE_SIZE : ((ids)[0]+1)) * sizeof(MDB_ID))
#define MDB_IDL_RANGE_FIRST(ids) ((ids)[1])
#define MDB_IDL_RANGE_LAST(ids) ((ids)[2])
#define MDB_IDL_RANGE( ids, f, l ) \
do { \
- (ids)[0] = NOID; \
+ (ids)[0] = MDB_NOID; \
(ids)[1] = (f); \
(ids)[2] = (l); \
} while(0)
} while(0)
#define MDB_IDL_IS_ZERO(ids) ( (ids)[0] == 0 )
-#define MDB_IDL_IS_ALL( range, ids ) ( (ids)[0] == NOID \
+#define MDB_IDL_IS_ALL( range, ids ) ( (ids)[0] == MDB_NOID \
&& (ids)[1] <= (range)[1] && (range)[2] <= (ids)[2] )
#define MDB_IDL_CPY( dst, src ) (memcpy( dst, src, MDB_IDL_SIZEOF( src ) ))
* @param[in] id The ID to insert.
* @return 0 on success, -1 if the ID was already present in the IDL.
*/
-int mdb_midl_insert( IDL ids, ID id );
+int mdb_midl_insert( MDB_IDL ids, MDB_ID id );
#endif
+ /** Allocate an IDL.
+ * Allocates memory for an IDL of a default size.
+ * @return IDL on success, NULL on failure.
+ */
+MDB_IDL mdb_midl_alloc();
+
+ /** Free an IDL.
+ * @param[in] ids The IDL to free.
+ */
+void mdb_midl_free(MDB_IDL ids);
+
+ /** Shrink an IDL.
+ * Return the IDL to the default size if it has grown larger.
+ * @param[in,out] idp Address of the IDL to shrink.
+ * @return 0 on no change, non-zero if shrunk.
+ */
+int mdb_midl_shrink(MDB_IDL *idp);
+
/** Append an ID onto an IDL.
- * @param[in,out] ids The IDL to append to.
+ * @param[in,out] idp Address of the IDL to append to.
* @param[in] id The ID to append.
- * @return 0 on success, -2 if the IDL is too large.
+ * @return 0 on success, -1 if the IDL is too large.
*/
-int mdb_midl_append( IDL ids, ID id );
+int mdb_midl_append( MDB_IDL *idp, MDB_ID id );
+
+ /** Append an IDL onto an IDL.
+ * @param[in,out] idp Address of the IDL to append to.
+ * @param[in] app The IDL to append.
+ * @return 0 on success, -1 if the IDL is too large.
+ */
+int mdb_midl_append_list( MDB_IDL *idp, MDB_IDL app );
/** Sort an IDL.
* @param[in,out] ids The IDL to sort.
*/
-void mdb_midl_sort( IDL ids );
+void mdb_midl_sort( MDB_IDL ids );
/** An ID2 is an ID/pointer pair.
*/
-typedef struct ID2 {
- ID mid; /**< The ID */
+typedef struct MDB_ID2 {
+ MDB_ID mid; /**< The ID */
void *mptr; /**< The pointer */
-} ID2;
+} MDB_ID2;
/** An ID2L is an ID2 List, a sorted array of ID2s.
* The first element's \b mid member is a count of how many actual
* elements are in the array. The \b mptr member of the first element is unused.
* The array is sorted in ascending order by \b mid.
*/
-typedef ID2 *ID2L;
+typedef MDB_ID2 *MDB_ID2L;
/** Search for an ID in an ID2L.
* @param[in] ids The ID2L to search.
* @param[in] id The ID to search for.
* @return The index of the first ID2 whose \b mid member is greater than or equal to \b id.
*/
-unsigned mdb_mid2l_search( ID2L ids, ID id );
+unsigned mdb_mid2l_search( MDB_ID2L ids, MDB_ID id );
/** Insert an ID2 into a ID2L.
* @param[in] id The ID2 to insert.
* @return 0 on success, -1 if the ID was already present in the ID2L.
*/
-int mdb_mid2l_insert( ID2L ids, ID2 *id );
+int mdb_mid2l_insert( MDB_ID2L ids, MDB_ID2 *id );
/** @} */
/** @} */
+#ifdef __cplusplus
+}
+#endif
#endif /* _MDB_MIDL_H_ */
projects / openldap / blobdiff