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only treat line breaks and spaces as whitespace for stream content

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This commit is contained in:
EliotJones 2025-08-03 18:20:24 -05:00
parent 8ef88bb725
commit f84caa0493
1 changed files with 13 additions and 8 deletions
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21
src/UglyToad.PdfPig/Parser/FileStructure/XrefStreamParser.cs
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@ -26,11 +26,8 @@ internal static class XrefStreamParser
var offsetCorrection = 0L;
bytes.Seek(xrefOffset);
if (!scanner.TryReadToken(out NumericToken _)
|| !scanner.TryReadToken(out NumericToken _)
|| !scanner.TryReadToken(out OperatorToken opToken)
|| !ReferenceEquals(opToken, OperatorToken.StartObject)
|| !scanner.TryReadToken(out DictionaryToken dictToken))
if (!TryReadStreamObjAt(xrefOffset, scanner, out var dictToken)
|| dictToken == null)
{
log.Debug($"Did not find the stream at {xrefOffset} attempting correction");
var recovered = TryRecoverOffset(fileHeaderOffset, xrefOffset, scanner);
@ -241,12 +238,20 @@ internal static class XrefStreamParser
{
}
var isWhitespaceActive = ReadHelper.IsWhitespace(bytes.CurrentByte);
bool IsStreamWhitespace()
{
return bytes.CurrentByte == (byte)' '
|| bytes.CurrentByte == (byte)'\r'
|| bytes.CurrentByte == (byte)'\n';
}
var isWhitespaceActive = IsStreamWhitespace();
do
{
// Normalize whitespace.
if (ReadHelper.IsWhitespace(bytes.CurrentByte))
if (IsStreamWhitespace())
{
buffer.Add((byte)' ');
@ -271,7 +276,7 @@ internal static class XrefStreamParser
{
startMarker = bytes.CurrentOffset;
isWhitespaceActive = ReadHelper.IsWhitespace(bytes.CurrentByte);
isWhitespaceActive = IsStreamWhitespace();
}
else if (buffer.EndsWith("endobj "))
{