internal static IDxfCodePairReader GetCodePairReader(string firstLine, int readBytes, BinaryReader binaryReader, Encoding defaultTextEncoding)
{
if (firstLine == DxbReader.BinarySentinel)
{
throw new DxfReadException("DXB files don't support code pairs. This path should never be hit.", readBytes);
}
else
{
Encoding.RegisterProvider(CodePagesEncodingProvider.Instance);
IDxfCodePairReader dxfReader;
if (firstLine == BinarySentinel)
{
// swallow next two bytes
var sub = binaryReader.ReadByte();
Debug.Assert(sub == 0x1A);
var nul = binaryReader.ReadByte();
Debug.Assert(nul == 0x00);
dxfReader = new DxfBinaryReader(binaryReader, readBytes + 2);
}
else
{
dxfReader = new DxfTextReader(binaryReader.BaseStream, defaultTextEncoding, firstLine);
}
return(dxfReader);
}
}
internal static IDxfCodePairReader GetCodePairReader(string firstLine, int readBytes, BinaryReader binaryReader)
{
if (firstLine == DxbReader.BinarySentinel)
{
throw new DxfReadException("DXB files don't support code pairs. This path should never be hit.", readBytes);
}
else
{
IDxfCodePairReader dxfReader;
if (firstLine == BinarySentinel)
{
dxfReader = new DxfBinaryReader(binaryReader, readBytes);
}
else
{
dxfReader = new DxfAsciiReader(binaryReader.BaseStream, firstLine);
}
return(dxfReader);
}
}
internal static IDxfCodePairReader GetCodePairReader(string firstLine, int readBytes, BinaryReader binaryReader)
{
if (firstLine == DxbReader.BinarySentinel)
{
throw new DxfReadException("DXB files don't support code pairs. This path should never be hit.", readBytes);
}
else
{
IDxfCodePairReader dxfReader;
if (firstLine == BinarySentinel)
{
dxfReader = new DxfBinaryReader(binaryReader, readBytes);
}
else
{
dxfReader = new DxfAsciiReader(binaryReader.BaseStream, firstLine);
}
return dxfReader;
}
}
public static DxfFile Load(Stream stream)
{
var reader = new BinaryReader(stream);
// read first line char-by-char
var sb = new StringBuilder();
char c = reader.ReadChar();
while (c != '\n')
{
sb.Append(c);
c = reader.ReadChar();
}
// trim BOM
var line = sb.ToString().TrimEnd('\r');
if (line.Length > 0 && line[0] == 0xFEFF)
{
line = line.Substring(1);
}
// check for binary sentinels
DxfFile file;
if (line == DxbReader.BinarySentinel)
{
file = new DxbReader().ReadFile(reader);
}
else
{
IDxfCodePairReader dxfReader;
if (line == BinarySentinel)
{
dxfReader = new DxfBinaryReader(reader);
}
else
{
dxfReader = new DxfAsciiReader(stream, line);
}
file = LoadFromReader(dxfReader);
}
return file;
}
