internal void Write(BitWriter writer)
{
writer.StartCrcCalculation();
writer.WriteStringAscii(Version.VersionString(), nullTerminated: false);
writer.WriteBytes(0, 0, 0, 0, 0);
if (Version == DwgVersionId.R14)
{
writer.WriteByte((byte)MaintenenceVersion);
}
else
{
writer.WriteByte(0);
}
writer.WriteByte(1);
writer.WriteInt(ImagePointer);
writer.WriteBytes(0, 0);
writer.WriteShort(CodePage);
writer.WriteInt(5); // 5 records
HeaderVariablesLocator.Write(writer);
ClassSectionLocator.Write(writer);
ObjectMapLocator.Write(writer);
UnknownSection_R13C3AndLaterLocator.Write(writer);
UnknownSection_PaddingLocator.Write(writer);
writer.WriteCrc(xorValue: 0x3CC4); // value for 5 records
writer.WriteBytes(HeaderSentinel);
}
public void Write(BitWriter writer, bool writingSecondHeader = false)
{
writer.WriteByte(RecordNumber);
if (writingSecondHeader)
{
writer.Write_BL(Pointer);
writer.Write_BL(Length);
}
else
{
writer.WriteInt(Pointer);
writer.WriteInt(Length);
}
}
public static BitWriter Write_BL(this BitWriter writer, int value)
{
if (value == 0)
{
writer.Write_BB(0b10);
}
else if (value >= 0 && value <= 255)
{
writer.Write_BB(0b01);
writer.WriteByte((byte)value);
}
else
{
writer.Write_BB(0b00);
writer.WriteInt(value);
}
return(writer);
}
public static BitWriter Write_RL(this BitWriter writer, int value)
{
writer.WriteInt(value);
return(writer);
}