private void ReadRange(string subset)
{
var lexer = new Lexer();
lexer.SetSource(Encoding.ASCII.GetBytes(subset));
while (lexer.Next() != null)
{
Expect(lexer, TokenType.HexString);
PdfHexString from = new PdfHexString {
Text = (string)lexer.Current.Value
};
lexer.Next();
Expect(lexer, TokenType.HexString);
PdfHexString to = new PdfHexString {
Text = (string)lexer.Current.Value
};
lexer.Next();
if (Accept(lexer, TokenType.HexString))
{
int offset = (new PdfHexString {
Text = (string)lexer.Current.Value
}).ToInt;
for (int i = from.ToInt; i <= to.ToInt; i++)
{
_toCode[i + offset] = i;
}
}
else if (Accept(lexer, TokenType.Array))
{
int index = from.ToInt;
while (true)
{
lexer.Next();
if (Accept(lexer, TokenType.EndArray))
{
break;
}
else if (Accept(lexer, TokenType.HexString))
{
int glyph = (new PdfHexString {
Text = (string)lexer.Current.Value
}).ToInt;
_toCode[glyph] = index++;
}
else
{
throw new ParserException($"Unable to parse ToUnicode CMap. Expected HexString or End Array at {lexer?.Current.Type}");
}
}
}
else
{
throw new ParserException($"Unable to parse ToUnicode CMap. Expected HexString or Array at {lexer?.Current.Type}");
}
}
}
private void WriteHexString(PdfHexString pdfHexString)
{
AsciiToOutput($"<{pdfHexString.Text}>");
}
