public static PdfStream Parse(PdfDictionary dictionary, Lexer lexer)
{
if (dictionary is null)
{
throw new ArgumentNullException(nameof(dictionary));
}
lexer.Expects("stream");
char eol = lexer.ReadChar();
if (eol == '\r')
{
eol = lexer.ReadChar();
}
if (eol != '\n')
{
throw new ParsingException($@"Stream must end with either \r\n or \n. Was '{eol}'");
}
IPdfObject lengthObject = dictionary["Length"];
if (lengthObject is null)
{
throw new ParsingException("Stream dictionary is missing 'Length' entry");
}
int length = 0;
if (lengthObject is PdfIndirectReference reference)
{
PdfIndirectObject lenobj = lexer.IndirectReferenceResolver
.GetObject(reference.ObjectNumber, reference.GenerationNumber);
length = ((PdfNumeric)lenobj.Object).ToInt32();
}
else
{
length = int.Parse(lengthObject.ToString(), CultureInfo.InvariantCulture);
}
var data = PdfData.Parse(lexer, length);
lexer.Expects("endstream");
return(new PdfStream(dictionary, data));
}
public static PdfObject ParseAny(Lexer lexer, string endToken)
{
string token = lexer.ReadToken();
if (token is null)
{
return(null);
}
switch (token)
{
case "null": return(PdfNull.Null); // null object
case "true":
case "false":
return(PdfBoolean.Parse(token));
case "/": return(PdfName.Parse(lexer));
case "%": return(PdfComment.Parse(lexer));
case "<": return(PdfHexadecimalString.Parse(lexer));
case "(": return(PdfLiteralString.Parse(lexer));
case "xref":
return(PdfXRef.Parse(lexer));
case "trailer":
return(PdfTrailer.Parse(lexer));
case "<<":
var dic = PdfDictionary.Parse(lexer);
// check for stream and combine put dictionary into stream object
token = lexer.PeekToken1();
if (token == "stream")
{
return(PdfStream.Parse(dic, lexer));
}
return(dic);
case "[": return(PdfArray.Parse(lexer));
case "startxref":
return(PdfStartXRef.Parse(lexer));
case ")":
case ">":
case ">>":
case "]":
case "}":
case "stream":
case "endstream":
case "endobj":
if (endToken == token)
{
return(null); // expected end
}
throw new ParsingException("Out of sync");
default:
// must be an integer or double value
PdfNumeric num = PdfNumeric.Parse(token);
if (num.IsInteger)
{
string token2 = lexer.PeekToken2();
switch (token2)
{
case "obj":
return(PdfIndirectObject.Parse(lexer, num.ToInt32()));
case "R":
PdfIndirectReference ir = PdfIndirectReference.Parse(lexer, num.ToInt32());
ir.Resolver = lexer.IndirectReferenceResolver;
return(ir);
default:
// ignore;
return(num);
}
}
else
{
return(num);
}
}
throw new ParsingException("Could not read object");
}