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No longer assumes xref object numbers. #33

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No longer assumes xref object numbers. #33

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54704e6
No longer assumes object number.
mlaukala Nov 9, 2017
f4b982d
First entry of secondary subsection are now read.
mlaukala Nov 13, 2017
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17 changes: 13 additions & 4 deletions src/PdfSharp/Pdf.IO/Parser.cs
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Original file line number Diff line number Diff line change
Expand Up @@ -1068,20 +1068,29 @@ private PdfTrailer ReadXRefTableAndTrailer(PdfCrossReferenceTable xrefTable)
symbol = ScanNextToken();
if (symbol == Symbol.Integer)
{
int start = _lexer.TokenToInteger;
int length = ReadInteger();
for (int id = start; id < start + length; id++)
for (int idx = 0; idx < length; idx++)
{
int position = ReadInteger();
int generation = ReadInteger();
ReadSymbol(Symbol.Keyword);
string token = _lexer.Token;

// Start entry should be marked as free.
// Skip start entry
if (id == 0)
continue;
//if (idx == 0)
// continue;

// Skip unused entries.
if (token != "n")
continue;

// Some PDF producers don't follow xref specs. Can't assume object number.
int pos = _lexer.Position;
_lexer.Position = position;
int id = ReadInteger();
_lexer.Position = pos;

// Even it is restricted, an object can exists in more than one subsection.
// (PDF Reference Implementation Notes 15).
PdfObjectID objectID = new PdfObjectID(id, generation);
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