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);
}
}