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authorHenrique Nakashima <hnakashima@chromium.org>2017-06-19 16:04:34 -0400
committerChromium commit bot <commit-bot@chromium.org>2017-06-19 20:44:58 +0000
commitb73ce7bcd72a97c780176d9f63681a5415c06422 (patch)
tree2e0b3b4f2996344101b9af67ce761708255b05ef /core/fpdfapi/parser/cpdf_parser.cpp
parentd3610056e36b9211e9ed3806a3f99a1184e9413e (diff)
downloadpdfium-b73ce7bcd72a97c780176d9f63681a5415c06422.tar.xz
Fixing metadata not read from linearized file.chromium/3136
This still won't work if the info dict is not on the first page without first calling FPDFAvail_IsFormAvail or FPDFAvail_IsPageAvail, as these are the methods that trigger parsing the rest of the data. Bug: pdfium:664 Change-Id: I0b0193e415a1153dcfb8bfba0e0482da6b6ba53c Reviewed-on: https://pdfium-review.googlesource.com/6610 Commit-Queue: Henrique Nakashima <hnakashima@chromium.org> Reviewed-by: dsinclair <dsinclair@chromium.org> Reviewed-by: Nicolás Peña <npm@chromium.org>
Diffstat (limited to 'core/fpdfapi/parser/cpdf_parser.cpp')
-rw-r--r--core/fpdfapi/parser/cpdf_parser.cpp19
1 files changed, 17 insertions, 2 deletions
diff --git a/core/fpdfapi/parser/cpdf_parser.cpp b/core/fpdfapi/parser/cpdf_parser.cpp
index 01c3b8ccd1..b2bde8d242 100644
--- a/core/fpdfapi/parser/cpdf_parser.cpp
+++ b/core/fpdfapi/parser/cpdf_parser.cpp
@@ -360,6 +360,9 @@ bool CPDF_Parser::LoadLinearizedAllCrossRefV4(FX_FILESIZE xrefpos,
if (!LoadLinearizedCrossRefV4(xrefpos, dwObjCount))
return false;
+ if (m_pTrailer)
+ m_Trailers.push_back(std::move(m_pTrailer));
+
m_pTrailer = LoadTrailerV4();
if (!m_pTrailer)
return false;
@@ -1084,7 +1087,18 @@ uint32_t CPDF_Parser::GetRootObjNum() {
uint32_t CPDF_Parser::GetInfoObjNum() {
CPDF_Reference* pRef =
ToReference(m_pTrailer ? m_pTrailer->GetObjectFor("Info") : nullptr);
- return pRef ? pRef->GetRefObjNum() : 0;
+ if (pRef)
+ return pRef->GetRefObjNum();
+
+ // Search trailers array from latest to earliest revision, as we want the
+ // most recent Info object number.
+ // See PDF 1.7 spec, section 3.4.5 - Incremental Updates.
+ for (auto it = m_Trailers.rbegin(); it != m_Trailers.rend(); ++it) {
+ pRef = ToReference(it->get()->GetObjectFor("Info"));
+ if (pRef)
+ return pRef->GetRefObjNum();
+ }
+ return 0;
}
std::unique_ptr<CPDF_Object> CPDF_Parser::ParseIndirectObject(
@@ -1545,7 +1559,8 @@ bool CPDF_Parser::LoadLinearizedAllCrossRefV5(FX_FILESIZE xrefpos) {
CPDF_Parser::Error CPDF_Parser::LoadLinearizedMainXRefTable() {
uint32_t dwSaveMetadataObjnum = m_pSyntax->m_MetadataObjnum;
m_pSyntax->m_MetadataObjnum = 0;
- m_pTrailer.reset();
+ if (m_pTrailer)
+ m_Trailers.push_back(std::move(m_pTrailer));
m_pSyntax->SetPos(m_LastXRefOffset - m_pSyntax->m_HeaderOffset);
uint8_t ch = 0;