/// <summary>
/// Create a new database object with the same underlying DB handle as
/// <paramref name="clone"/>. Used during Database.Open to get an
/// object of the correct DBTYPE.
/// </summary>
/// <param name="clone">Database to clone</param>
protected BaseDatabase(BaseDatabase clone) {
db = clone.db;
clone.db = null;
db.api_internal = this;
env = clone.env;
clone.env = null;
}
internal int associate(DB_TXN txn, DB sec, BDB_AssociateDelegate callback, uint flags)
{
int ret;
ret = libdb_csharpPINVOKE.DB_associate(swigCPtr, DB_TXN.getCPtr(txn), DB.getCPtr(sec), callback, flags);
DatabaseException.ThrowException(ret);
return ret;
}
internal int associate_foreign(DB dbp, BDB_AssociateForeignDelegate callback, uint flags)
{
int ret;
ret = libdb_csharpPINVOKE.DB_associate_foreign(swigCPtr, DB.getCPtr(dbp), callback, flags);
DatabaseException.ThrowException(ret);
return ret;
}
/// <summary>
/// Protected constructor
/// </summary>
/// <param name="envp">
/// The environment in which to create this database
/// </param>
/// <param name="flags">Flags to pass to the DB->create() method</param>
protected BaseDatabase(DatabaseEnvironment envp, uint flags) {
db = new DB(envp == null ? null : envp.dbenv, flags);
db.api_internal = this;
if (envp == null) {
env = new DatabaseEnvironment(db.env());
} else
env = envp;
}
private static int doDupCompare(
IntPtr dbp, IntPtr dbt1p, IntPtr dbt2p, IntPtr locp)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbt1p, false);
DBT dbt2 = new DBT(dbt2p, false);
if (locp != IntPtr.Zero)
locp = IntPtr.Zero;
return ((SecondaryBTreeDatabase)(db.api_internal)).DupCompare(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static uint doPrefixCompare(
IntPtr dbp, IntPtr dbtp1, IntPtr dbtp2)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
DBT dbt2 = new DBT(dbtp2, false);
SecondaryBTreeDatabase tmp =
(SecondaryBTreeDatabase)db.api_internal;
return tmp.prefixCompareHandler(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static uint doHash(IntPtr dbp, IntPtr datap, uint len)
{
DB db = new DB(dbp, false);
byte[] t_data = new byte[len];
Marshal.Copy(datap, t_data, 0, (int)len);
SecondaryHashDatabase tmp = (SecondaryHashDatabase)db.api_internal;
return tmp.HashFunction(t_data);
}
private static int doCompare(IntPtr dbp,
IntPtr dbtp1, IntPtr dbtp2, IntPtr locp)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
DBT dbt2 = new DBT(dbtp2, false);
if (locp != IntPtr.Zero)
locp = IntPtr.Zero;
SecondaryBTreeDatabase tmp =
(SecondaryBTreeDatabase)db.api_internal;
return tmp.compareHandler(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static int doCompare(IntPtr dbp,
IntPtr dbtp1, IntPtr dbtp2, IntPtr locp)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
DBT dbt2 = new DBT(dbtp2, false);
if (locp != IntPtr.Zero)
locp = IntPtr.Zero;
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
return btdb.Compare(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static int doDupCompare(
IntPtr dbp, IntPtr dbt1p, IntPtr dbt2p)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbt1p, false);
DBT dbt2 = new DBT(dbt2p, false);
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
return btdb.DupCompare(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
internal DB_SEQUENCE(DB dbp, uint flags) : this(libdb_csharpPINVOKE.new_DB_SEQUENCE(DB.getCPtr(dbp), flags), true)
{
}
internal DB_SEQUENCE(DB dbp, uint flags)
: this(libdb_csharpPINVOKE.new_DB_SEQUENCE(DB.getCPtr(dbp), flags), true)
{
}
private static uint doHash(IntPtr dbp, IntPtr datap, uint len)
{
DB db = new DB(dbp, false);
byte[] t_data = new byte[len];
Marshal.Copy(datap, t_data, 0, (int)len);
return ((HashDatabase)(db.api_internal)).hashHandler(t_data);
}
private static void doFeedback(IntPtr dbp, int opcode, int percent)
{
DB db = new DB(dbp, false);
db.api_internal.Feedback((DatabaseFeedbackEvent)opcode, percent);
}
private static int doCompare(IntPtr dbp, IntPtr dbtp1, IntPtr dbtp2)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
DBT dbt2 = new DBT(dbtp2, false);
return ((HashDatabase)(db.api_internal)).compareHandler(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
/// <summary>
/// Protected method to call the key generation function.
/// </summary>
/// <param name="dbp">Secondary DB Handle</param>
/// <param name="keyp">Primary Key</param>
/// <param name="datap">Primary Data</param>
/// <param name="skeyp">Scondary Key</param>
/// <returns>0 on success, !0 on failure</returns>
protected static int doAssociate(
IntPtr dbp, IntPtr keyp, IntPtr datap, IntPtr skeyp)
{
DB db = new DB(dbp, false);
DBT key = new DBT(keyp, false);
DBT data = new DBT(datap, false);
DBT skey = new DBT(skeyp, false);
DatabaseEntry s =
((SecondaryDatabase)db.api_internal).KeyGen(
DatabaseEntry.fromDBT(key), DatabaseEntry.fromDBT(data));
if (s == null)
return DbConstants.DB_DONOTINDEX;
skey.data = s.Data;
return 0;
}
private static uint doPartition(IntPtr dbp, IntPtr dbtp)
{
DB db = new DB(dbp, false);
DatabaseEntry dbt = DatabaseEntry.fromDBT(new DBT(dbtp, false));
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
return btdb.Partition(dbt);
}
private static void doAppend(IntPtr dbp, IntPtr dbtp1, uint recno)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
RecnoDatabase rdb = (RecnoDatabase)(db.api_internal);
rdb.AppendCallback(DatabaseEntry.fromDBT(dbt1), recno);
}
/// <summary>
/// Protected method to nullify a foreign key
/// </summary>
/// <param name="dbp">Secondary DB Handle</param>
/// <param name="keyp">Primary Key</param>
/// <param name="datap">Primary Data</param>
/// <param name="fkeyp">Foreign Key</param>
/// <param name="changed">Whether the foreign key has changed</param>
/// <returns>0 on success, !0 on failure</returns>
protected static int doNullify(IntPtr dbp,
IntPtr keyp, IntPtr datap, IntPtr fkeyp, ref int changed) {
DB db = new DB(dbp, false);
DBT key = new DBT(keyp, false);
DBT data = new DBT(datap, false);
DBT fkey = new DBT(fkeyp, false);
DatabaseEntry d = ((SecondaryDatabase)db.api_internal).Nullifier(
DatabaseEntry.fromDBT(key),
DatabaseEntry.fromDBT(data), DatabaseEntry.fromDBT(fkey));
if (d == null)
changed = 0;
else {
changed = 1;
data.data = d.Data;
}
return 0;
}
internal static HandleRef getCPtr(DB obj)
{
return (obj == null) ? new HandleRef(null, IntPtr.Zero) : obj.swigCPtr;
}
private static int doDupCompare(
IntPtr dbp, IntPtr dbt1p, IntPtr dbt2p)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbt1p, false);
DBT dbt2 = new DBT(dbt2p, false);
SecondaryHashDatabase tmp = (SecondaryHashDatabase)db.api_internal;
return tmp.DupCompare(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static uint doPrefixCompare(
IntPtr dbp, IntPtr dbtp1, IntPtr dbtp2)
{
DB db = new DB(dbp, false);
DBT dbt1 = new DBT(dbtp1, false);
DBT dbt2 = new DBT(dbtp2, false);
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
return btdb.PrefixCompare(
DatabaseEntry.fromDBT(dbt1), DatabaseEntry.fromDBT(dbt2));
}
private static void doMsgFeedback(IntPtr dbp, string msg)
{
DB db = new DB(dbp, false);
db.api_internal.msgFeedbackHandler(msg);
}
/// <summary>
/// Protected method to call the key generation function.
/// </summary>
/// <param name="dbp">Secondary DB Handle</param>
/// <param name="keyp">Primary Key</param>
/// <param name="datap">Primary Data</param>
/// <param name="skeyp">Scondary Key</param>
/// <returns>0 on success, !0 on failure</returns>
protected static int doAssociate(
IntPtr dbp, IntPtr keyp, IntPtr datap, IntPtr skeyp) {
DB db = new DB(dbp, false);
DBT key = new DBT(keyp, false);
DBT data = new DBT(datap, false);
DBT skey = new DBT(skeyp, false);
IntPtr dataPtr, sdataPtr;
int nrecs, dbt_sz;
DatabaseEntry s =
((SecondaryDatabase)db.api_internal).KeyGen(
DatabaseEntry.fromDBT(key), DatabaseEntry.fromDBT(data));
if (s == null)
return DbConstants.DB_DONOTINDEX;
if (s is MultipleDatabaseEntry) {
MultipleDatabaseEntry mde = (MultipleDatabaseEntry)s;
nrecs = mde.nRecs;
/*
* Allocate an array of nrecs DBT in native memory. The call
* returns sizeof(DBT), so that we know where one DBT ends and
* the next begins.
*/
dbt_sz = (int)libdb_csharp.alloc_dbt_arr(null, nrecs, out sdataPtr);
/*
* We need a managed array to copy each DBT into and then we'll
* copy the managed array to the native array we just allocated.
* We are not able to copy native -> native.
*/
byte[] arr = new byte[nrecs * dbt_sz];
IntPtr p;
int off = 0;
/* Copy each DBT into the array. */
foreach (DatabaseEntry dbt in mde) {
/* Allocate room for the data in native memory. */
dataPtr = libdb_csharp.__os_umalloc(null, dbt.size);
Marshal.Copy(dbt.Data, 0, dataPtr, (int)dbt.size);
dbt.dbt.dataPtr = dataPtr;
dbt.flags |= DbConstants.DB_DBT_APPMALLOC;
p = DBT.getCPtr(DatabaseEntry.getDBT(dbt)).Handle;
Marshal.Copy(p, arr, off, dbt_sz);
off += dbt_sz;
}
Marshal.Copy(arr, 0, sdataPtr, nrecs * dbt_sz);
skey.dataPtr = sdataPtr;
skey.size = (uint)mde.nRecs;
skey.flags = DbConstants.DB_DBT_MULTIPLE | DbConstants.DB_DBT_APPMALLOC;
} else
skey.data = s.Data;
return 0;
}
private static int doCompress(IntPtr dbp, IntPtr prevKeyp,
IntPtr prevDatap, IntPtr keyp, IntPtr datap, IntPtr destp)
{
DB db = new DB(dbp, false);
DatabaseEntry prevKey =
DatabaseEntry.fromDBT(new DBT(prevKeyp, false));
DatabaseEntry prevData =
DatabaseEntry.fromDBT(new DBT(prevDatap, false));
DatabaseEntry key = DatabaseEntry.fromDBT(new DBT(keyp, false));
DatabaseEntry data = DatabaseEntry.fromDBT(new DBT(datap, false));
DBT dest = new DBT(destp, false);
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
byte[] arr = new byte[(int)dest.ulen];
int len;
try {
if (btdb.Compress(prevKey, prevData, key, data, ref arr, out len)) {
Marshal.Copy(arr, 0, dest.dataPtr, len);
dest.size = (uint)len;
return 0;
} else {
return DbConstants.DB_BUFFER_SMALL;
}
} catch (Exception) {
return -1;
}
}
internal static SecondaryDatabase fromDB(DB dbp) {
try {
return (SecondaryDatabase)dbp.api_internal;
} catch { }
return null;
}
private static int doDecompress(IntPtr dbp, IntPtr prevKeyp,
IntPtr prevDatap, IntPtr cmpp, IntPtr destKeyp, IntPtr destDatap)
{
DB db = new DB(dbp, false);
DatabaseEntry prevKey =
DatabaseEntry.fromDBT(new DBT(prevKeyp, false));
DatabaseEntry prevData =
DatabaseEntry.fromDBT(new DBT(prevDatap, false));
DBT compressed = new DBT(cmpp, false);
DBT destKey = new DBT(destKeyp, false);
DBT destData = new DBT(destDatap, false);
BTreeDatabase btdb = (BTreeDatabase)(db.api_internal);
uint size;
try {
KeyValuePair<DatabaseEntry, DatabaseEntry> kvp = btdb.Decompress(prevKey, prevData, compressed.data, out size);
int keylen = kvp.Key.Data.Length;
int datalen = kvp.Value.Data.Length;
destKey.size = (uint)keylen;
destData.size = (uint)datalen;
if (keylen > destKey.ulen ||
datalen > destData.ulen)
return DbConstants.DB_BUFFER_SMALL;
Marshal.Copy(kvp.Key.Data, 0, destKey.dataPtr, keylen);
Marshal.Copy(kvp.Value.Data, 0, destData.dataPtr, datalen);
compressed.size = size;
return 0;
} catch (Exception) {
return -1;
}
}
