internal static object ReadPrimitive(ReaderBase reader, TypeCode code)
{
switch (code)
{
case TypeCode.Boolean:
return(reader.ReadBoolean());
case TypeCode.Byte:
return(reader.ReadByte());
case TypeCode.Char:
return(reader.ReadChar());
case TypeCode.DateTime:
return(reader.ReadDateTime());
case TypeCode.Decimal:
return(reader.ReadDecimal());
case TypeCode.Double:
return(reader.ReadDouble());
case TypeCode.Int16:
return(reader.ReadInt16());
case TypeCode.Int32:
return(reader.ReadInt32());
case TypeCode.Int64:
return(reader.ReadInt64());
case TypeCode.SByte:
return(reader.ReadSByte());
case TypeCode.Single:
return(reader.ReadSingle());
case TypeCode.String:
return(reader.ReadString());
case TypeCode.UInt16:
return(reader.ReadUInt16());
case TypeCode.UInt32:
return(reader.ReadUInt32());
case TypeCode.UInt64:
return(reader.ReadUInt64());
case TypeCode.DBNull:
return(DBNull.Value);
}
return(null);
}
public static BTreeHeader Parse(ReaderBase reader)
{
reader.CheckSize(8);
BTreeHeader res = new BTreeHeader();
res.Type = (BTreeType)reader.ReadByte();
res.FirstFreeBlock = reader.ReadUInt16();
res.CellCount = reader.ReadUInt16();
res.CellContentBegin = reader.ReadUInt16();
res.CellContentFragmentedFreeBytes = reader.ReadByte();
if (res.Type == BTreeType.InteriorIndexBtreePage || res.Type == BTreeType.InteriorTableBtreePage)
{
reader.CheckSize(sizeof(uint));
res.RightMostPointer = reader.ReadUInt32();
}
return(res);
}
internal static BTreePage Parse(ReaderBase reader, uint page)
{
// Read header
reader.SeekPage(page);
if (page == 1)
{
// Skip the first 100 bytes
reader.Skip(DatabaseHeader.HeaderSize);
}
BTreeHeader header = BTreeHeader.Parse(reader);
// Read cells
ushort[] cellOffsets = new ushort[header.CellCount];
for (ushort i = 0; i < header.CellCount; i++)
{
cellOffsets[i] = reader.ReadUInt16();
}
Array.Sort(cellOffsets);
BTreePage res;
switch (header.Type)
{
case BTreeType.InteriorIndexBtreePage:
throw new ArgumentOutOfRangeException();
case BTreeType.InteriorTableBtreePage:
res = new BTreeInteriorTablePage(reader, page, header, cellOffsets);
break;
case BTreeType.LeafIndexBtreePage:
throw new ArgumentOutOfRangeException();
case BTreeType.LeafTableBtreePage:
res = new BTreeLeafTablePage(reader, page, header, cellOffsets);
break;
default:
throw new ArgumentOutOfRangeException();
}
res.ParseInternal();
return(res);
}
internal static DatabaseHeader Parse(ReaderBase reader)
{
// The header is 100 bytes
reader.CheckSize(100);
reader.CheckMagicBytes(_expectedHeader);
// Read header
DatabaseHeader res = new DatabaseHeader();
res.PageSize = reader.ReadUInt16();
res.WriteVersion = (FileWriteVersion)reader.ReadByte();
res.ReadVersion = (FileReadVersion)reader.ReadByte();
res.ReservedSpaceAtEndOfPage = reader.ReadByte();
res.MaximumEmbeddedPayloadFraction = reader.ReadByte();
res.MinimumEmbeddedPayloadFraction = reader.ReadByte();
res.LeafPayloadFraction = reader.ReadByte();
res.ChangeCounter = reader.ReadUInt32();
res.DatabaseSizeInPages = reader.ReadUInt32();
res.FirstFreelistTrunkPage = reader.ReadUInt32();
res.FreeListPages = reader.ReadUInt32();
res.SchemaCookie = reader.ReadUInt32();
res.SchemaFormat = reader.ReadUInt32();
res.DefaultPageCacheSize = reader.ReadUInt32();
res.Value7 = reader.ReadUInt32();
res.TextEncoding = (SqliteEncoding)reader.ReadUInt32();
res.UserVersion = reader.ReadUInt32();
res.IncrementalVacuumMode = reader.ReadUInt32();
res.ApplicationId = reader.ReadUInt32();
reader.Skip(20);
res.VersionValidFor = reader.ReadUInt32();
res.Version = reader.ReadUInt32();
// TODO: Warn/err on mismatch with expected values
return(res);
}
