From 17b1c191da26e477c6898a8b06f2ff624f9e4c6b Mon Sep 17 00:00:00 2001
From: Artem Strygin <art-snake@yandex-team.ru>
Date: Wed, 2 Aug 2017 14:27:22 +0300
Subject: Unify parsing of cross refs v4

Change-Id: I7e3d45263a0bae61fd86fd4c3710de7fc0b9347d
Reviewed-on: https://pdfium-review.googlesource.com/9290
Reviewed-by: Wei Li <weili@chromium.org>
Commit-Queue: Art Snake <art-snake@yandex-team.ru>
---
 core/fpdfapi/parser/cpdf_parser.h | 15 +++++++++++++++
 1 file changed, 15 insertions(+)

(limited to 'core/fpdfapi/parser/cpdf_parser.h')

diff --git a/core/fpdfapi/parser/cpdf_parser.h b/core/fpdfapi/parser/cpdf_parser.h
index ece1e6a2d4..759d042360 100644
--- a/core/fpdfapi/parser/cpdf_parser.h
+++ b/core/fpdfapi/parser/cpdf_parser.h
@@ -148,6 +148,11 @@ class CPDF_Parser {
     kEndObj
   };
 
+  struct CrossRefObjData {
+    uint32_t obj_num = 0;
+    ObjectInfo info;
+  };
+
   CPDF_Object* ParseDirect(CPDF_Object* pObj);
   bool LoadAllCrossRefV4(FX_FILESIZE pos);
   bool LoadAllCrossRefV5(FX_FILESIZE pos);
@@ -169,6 +174,16 @@ class CPDF_Parser {
   // the objects.
   bool VerifyCrossRefV4();
 
+  // If out_objects is null, the parser position will be moved to end subsection
+  // without additional validation.
+  bool ParseAndAppendCrossRefSubsectionData(
+      uint32_t start_objnum,
+      uint32_t count,
+      std::vector<CrossRefObjData>* out_objects);
+  bool ParseCrossRefV4(std::vector<CrossRefObjData>* out_objects,
+                       uint32_t* start_obj_num_at_last_block);
+  void MergeCrossRefObjectsData(const std::vector<CrossRefObjData>& objects);
+
   CFX_UnownedPtr<CPDF_Document> m_pDocument;
   bool m_bHasParsed;
   bool m_bXRefStream;
-- 
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