public UtfBuilder(DuplicatableStream stream, Endianness endian = Endianness.BigEndian)
{
long utfHeaderOffset = stream.Position;
uint utfMagic = stream.ReadUInt32(Endianness.LittleEndian);
if (utfMagic != 0x46545540)
{
throw new Exception("wrong UTF magic");
}
uint size = stream.ReadUInt32(endian); // size of the whole UTF chunk minus the magic and this value itself
// offsets are relative to here
long offset = stream.Position;
uint rowsLocation = stream.ReadUInt32(endian);
uint stringTableLocation = stream.ReadUInt32(endian);
uint dataTableLocation = stream.ReadUInt32(endian);
uint tableNameLocationInStringTable = stream.ReadUInt32(endian);
ushort colcount = stream.ReadUInt16(endian);
ushort rowwidth = stream.ReadUInt16(endian);
uint rowcount = stream.ReadUInt32(endian);
string tableName = stream.ReadUTF8NulltermFromLocationAndReset(offset + stringTableLocation + tableNameLocationInStringTable);
// utf_tab calls this the 'schema'
List <ColumnData> columns = new List <ColumnData>(colcount);
for (int i = 0; i < colcount; ++i)
{
ColumnData col = new ColumnData();
col.Type = stream.ReadUInt8();
uint stroffset = stream.ReadUInt32(endian);
col.Name = stream.ReadUTF8NulltermFromLocationAndReset(offset + stringTableLocation + stroffset);
if ((col.Type & utf_tab_sharp.UtfTab.COLUMN_STORAGE_MASK) == utf_tab_sharp.UtfTab.COLUMN_STORAGE_CONSTANT)
{
switch (col.Type & utf_tab_sharp.UtfTab.COLUMN_TYPE_MASK)
{
case utf_tab_sharp.UtfTab.COLUMN_TYPE_STRING:
uint datastroffset = stream.ReadUInt32(endian);
col.Data = stream.ReadUTF8NulltermFromLocationAndReset(offset + stringTableLocation + datastroffset);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_8BYTE:
col.Data = stream.ReadUInt64(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_DATA:
uint dataOffset = stream.ReadUInt32(endian);
uint dataSize = stream.ReadUInt32(endian);
col.Data = stream.ReadBytesFromLocationAndReset(offset + dataTableLocation + dataOffset, dataSize);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_FLOAT:
col.Data = stream.ReadUInt32(endian).UIntToFloat();
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE:
col.Data = stream.ReadUInt32(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE:
col.Data = stream.ReadUInt16(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE:
col.Data = stream.ReadUInt8();
break;
default:
throw new Exception("unknown type for constant");
}
}
columns.Add(col);
}
List <RowData> rows = new List <RowData>((int)rowcount);
for (long i = 0; i < rowcount; ++i)
{
stream.Position = offset + rowsLocation + (i * rowwidth);
RowData row = new RowData();
row.Cells = new List <CellData>();
for (int j = 0; j < colcount; ++j)
{
CellData cell = new CellData();
byte type = columns[j].Type;
switch ((type & utf_tab_sharp.UtfTab.COLUMN_STORAGE_MASK))
{
case utf_tab_sharp.UtfTab.COLUMN_STORAGE_PERROW:
switch (type & utf_tab_sharp.UtfTab.COLUMN_TYPE_MASK)
{
case utf_tab_sharp.UtfTab.COLUMN_TYPE_STRING:
uint datastroffset = stream.ReadUInt32(endian);
cell.Data = stream.ReadUTF8NulltermFromLocationAndReset(offset + stringTableLocation + datastroffset);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_8BYTE:
cell.Data = stream.ReadUInt64(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_DATA:
uint dataOffset = stream.ReadUInt32(endian);
uint dataSize = stream.ReadUInt32(endian);
cell.Data = stream.ReadBytesFromLocationAndReset(offset + dataTableLocation + dataOffset, dataSize);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_FLOAT:
cell.Data = stream.ReadUInt32(endian).UIntToFloat();
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE:
cell.Data = stream.ReadUInt32(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE:
cell.Data = stream.ReadUInt16(endian);
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE:
cell.Data = stream.ReadUInt8();
break;
default:
throw new Exception("unknown type for value");
}
break;
case utf_tab_sharp.UtfTab.COLUMN_STORAGE_CONSTANT:
cell.Data = columns[j].Data;
break;
case utf_tab_sharp.UtfTab.COLUMN_STORAGE_ZERO:
switch (type & utf_tab_sharp.UtfTab.COLUMN_TYPE_MASK)
{
case utf_tab_sharp.UtfTab.COLUMN_TYPE_STRING:
cell.Data = "";
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_8BYTE:
cell.Data = (ulong)0;
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_DATA:
cell.Data = new byte[0];
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_FLOAT:
cell.Data = 0.0f;
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_4BYTE:
cell.Data = (uint)0;
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_2BYTE:
cell.Data = (ushort)0;
break;
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE2:
case utf_tab_sharp.UtfTab.COLUMN_TYPE_1BYTE:
cell.Data = (byte)0;
break;
default:
throw new Exception("unknown type for value");
}
break;
default:
throw new Exception("unknown storage for value");
}
row.Cells.Add(cell);
}
rows.Add(row);
}
Name = tableName;
Columns = columns;
Rows = rows;
stream.Position = utfHeaderOffset + ((long)8) + ((long)size);
return;
}