public PdfObject Parse(long offset)
{
if (offset >= 0)
{
_lexer.SetPosition(offset);
}
PdfToken t = _lexer.GetNextToken();
return(new PdfObject());
}
private PdfToken matchKeyword(int ch)
{
_buffer.Clear();
while (true)
{
ch = readByte();
if (ch == CHAR_EOF || isWhiteSpace(ch) || isDelimiter(ch))
{
putBack();
PdfToken token = new PdfToken(PdfToken.TokenType.KEYWORD, _buffer.ToArray());
}
else
{
_buffer.Add((byte)ch);
}
}
}
private PdfToken matchNumber(int ch)
{
_buffer.Clear();
while (true)
{
_buffer.Add((byte)ch);
ch = readByte();
if (ch == CHAR_EOF || isWhiteSpace(ch) || isDelimiter(ch))
{
putBack();
if (_buffer.Count == 0)
{
throw new Exception("Invalid number object: The number cannot be null.");
}
byte[] data = _buffer.ToArray();
string val = Encoding.ASCII.GetString(data);
if (val.Contains("."))
{
try {
double n = double.Parse(val);
PdfToken token = new PdfToken(PdfToken.TokenType.NUMBER, data, PdfToken.TokenSubType.REAL, n);
return(token);
}
catch (Exception ex) {
throw new Exception("Invalid number object: '" + val + "' is not a valid number.", ex);
}
}
else
{
try {
int n = int.Parse(val);
PdfToken token = new PdfToken(PdfToken.TokenType.NUMBER, data, PdfToken.TokenSubType.INTEGER, n);
return(token);
}
catch (Exception ex) {
throw new Exception("Invalid number object: '" + val + "' is not a valid number.", ex);
}
}
}
}
}
private PdfToken matchName()
{
_buffer.Clear();
while (true)
{
int ch = readByte();
if (ch == CHAR_EOF || isWhiteSpace(ch) || isDelimiter(ch))
{
putBack();
if (_buffer.Count == 0)
{
throw new Exception("Invalid name object: The name cannot be null.");
}
PdfToken token = new PdfToken(PdfToken.TokenType.NAME, _buffer.ToArray());
return(token);
}
else
{
_buffer.Add((byte)ch);
}
}
}
private void SetTokenPosition(PdfToken token)
{
token.Offset = _tokenStart;
token.Length = this.GetPosition() - _tokenStart;
}