OpenSystemsDevelopment / qpdf

Commit ec48820c3cf8ead0add464c60f5dddd84ba0097d

Authored by Jay Berkenbilt
1 parent 258675fc

Fix loop detection in NNTree

Inline Side-by-side
Showing 2 changed files with 30 additions and 12 deletions
libqpdf/NNTree.cc
  View file @ec48820
... ... @@ -450,8 +450,8 @@ NNTreeIterator::split(QPDFObjectHandle to_split,
450 450  
451 451 // CURRENT STATE: half the items from the kids or items array in
452 452 // the node being split have been moved into a new node. The new
453   - // node is not yet attached to the tree. The iterator have a path
454   - // element or leaf node that is out of bounds.
  453 + // node is not yet attached to the tree. The iterator may have a
  454 + // path element or leaf node that is out of bounds.
455 455  
456 456 // We need to adjust the parent to add the second node to /Kids
457 457 // and, if needed, update kid_number to traverse through it. We
... ... @@ -748,6 +748,13 @@ NNTreeIterator::deepen(QPDFObjectHandle node, bool first, bool allow_empty)
748 748 bool failed = false;
749 749  
750 750 std::set<QPDFObjGen> seen;
  751 + for (auto i: this->path)
  752 + {
  753 + if (i.node.isIndirect())
  754 + {
  755 + seen.insert(i.node.getObjGen());
  756 + }
  757 + }
751 758 while (! failed)
752 759 {
753 760 if (node.isIndirect())
... ...
qpdf/qtest/qpdf/name-tree.pdf
  View file @ec48820
... ... @@ -288,7 +288,8 @@ endobj
288 288 <<
289 289 /Limits [ (E) (Z) ]
290 290 /Kids [
291   - 30 0 R
  291 + 27 0 R
  292 + 37 0 R
292 293 ]
293 294 >>
294 295 endobj
... ... @@ -350,8 +351,17 @@ endobj
350 351 >>
351 352 endobj
352 353  
  354 +37 0 obj
  355 +<<
  356 + /Limits [ (E) (Z) ]
  357 + /Kids [
  358 + 30 0 R
  359 + ]
  360 +>>
  361 +endobj
  362 +
353 363 xref
354   -0 37
  364 +0 38
355 365 0000000000 65535 f
356 366 0000000025 00000 n
357 367 0000000079 00000 n
... ... @@ -383,12 +393,13 @@ xref
383 393 0000002282 00000 n
384 394 0000002341 00000 n
385 395 0000002413 00000 n
386   -0000002483 00000 n
387   -0000002531 00000 n
388   -0000002634 00000 n
389   -0000002718 00000 n
390   -0000002790 00000 n
391   -0000002862 00000 n
  396 +0000002494 00000 n
  397 +0000002542 00000 n
  398 +0000002645 00000 n
  399 +0000002729 00000 n
  400 +0000002801 00000 n
  401 +0000002873 00000 n
  402 +0000002943 00000 n
392 403 trailer <<
393 404 /Root 1 0 R
394 405 /QTest 8 0 R
... ... @@ -400,9 +411,9 @@ trailer &lt;&lt;
400 411 /Bad4 23 0 R
401 412 /Bad5 28 0 R
402 413 /Bad6 31 0 R
403   - /Size 37
  414 + /Size 38
404 415 /ID [<2c3b7a6ec7fc61db8a5db4eebf57f540><2c3b7a6ec7fc61db8a5db4eebf57f540>]
405 416 >>
406 417 startxref
407   -2932
  418 +3013
408 419 %%EOF
... ...