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Posted to commits@pdfbox.apache.org by le...@apache.org on 2017/05/11 20:49:28 UTC
svn commit: r1794891 -
/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java
Author: lehmi
Date: Thu May 11 20:49:27 2017
New Revision: 1794891
URL: http://svn.apache.org/viewvc?rev=1794891&view=rev
Log:
PDFBOX-3788: avoid negative seek offset
Modified:
pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java
Modified: pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java
URL: http://svn.apache.org/viewvc/pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java?rev=1794891&r1=1794890&r2=1794891&view=diff
==============================================================================
--- pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java (original)
+++ pdfbox/trunk/pdfbox/src/main/java/org/apache/pdfbox/pdfparser/COSParser.java Thu May 11 20:49:27 2017
@@ -403,11 +403,19 @@ public class COSParser extends BaseParse
{
LOG.debug("Performing brute force search for last startxref entry");
long bfOffset = bfSearchForLastStartxrefEntry();
- source.seek(bfOffset);
- long bfXref = parseStartXref();
+ boolean offsetIsValid = false;
+ if (bfOffset > -1)
+ {
+ source.seek(bfOffset);
+ long bfXref = parseStartXref();
+ if (bfXref > -1)
+ {
+ offsetIsValid = checkXRefOffset(bfXref) == bfXref;
+ }
+ }
source.seek(0);
// use the new offset only if it is a valid pointer to a xref table
- return checkXRefOffset(bfXref) == bfXref ? bfOffset : -1;
+ return offsetIsValid ? bfOffset : -1;
}
else
{