From caee9596e926a41a23fa0ddebd10d509db4b23ab Mon Sep 17 00:00:00 2001
From: Artem Strygin <art-snake@yandex-team.ru>
Date: Mon, 30 Oct 2017 21:03:02 +0000
Subject: Remove useless code.

Change-Id: I5fa9472eecc176d25213fd446a4abc06e815a48b
Reviewed-on: https://pdfium-review.googlesource.com/15592
Commit-Queue: Art Snake <art-snake@yandex-team.ru>
Reviewed-by: dsinclair <dsinclair@chromium.org>
---
 core/fpdfapi/parser/cpdf_data_avail.cpp | 110 --------------------------------
 core/fpdfapi/parser/cpdf_data_avail.h   |   7 --
 2 files changed, 117 deletions(-)

diff --git a/core/fpdfapi/parser/cpdf_data_avail.cpp b/core/fpdfapi/parser/cpdf_data_avail.cpp
index 549ed75425..93dd39b87b 100644
--- a/core/fpdfapi/parser/cpdf_data_avail.cpp
+++ b/core/fpdfapi/parser/cpdf_data_avail.cpp
@@ -118,78 +118,6 @@ void CPDF_DataAvail::SetDocument(CPDF_Document* pDoc) {
   m_pDocument = pDoc;
 }
 
-bool CPDF_DataAvail::AreObjectsAvailable(std::vector<CPDF_Object*>& obj_array,
-                                         bool bParsePage,
-                                         std::vector<CPDF_Object*>& ret_array) {
-  if (obj_array.empty())
-    return true;
-
-  uint32_t count = 0;
-  std::vector<CPDF_Object*> new_obj_array;
-  for (CPDF_Object* pObj : obj_array) {
-    if (!pObj)
-      continue;
-
-    int32_t type = pObj->GetType();
-    switch (type) {
-      case CPDF_Object::ARRAY: {
-        CPDF_Array* pArray = pObj->AsArray();
-        for (size_t k = 0; k < pArray->GetCount(); ++k)
-          new_obj_array.push_back(pArray->GetObjectAt(k));
-        break;
-      }
-      case CPDF_Object::STREAM:
-        pObj = pObj->GetDict();
-      case CPDF_Object::DICTIONARY: {
-        CPDF_Dictionary* pDict = pObj->GetDict();
-        if (pDict && pDict->GetStringFor("Type") == "Page" && !bParsePage)
-          continue;
-
-        for (const auto& it : *pDict) {
-          if (it.first != "Parent")
-            new_obj_array.push_back(it.second.get());
-        }
-        break;
-      }
-      case CPDF_Object::REFERENCE: {
-        const CPDF_ReadValidator::Session read_session(GetValidator().Get());
-
-        CPDF_Reference* pRef = pObj->AsReference();
-        const uint32_t dwNum = pRef->GetRefObjNum();
-
-        if (pdfium::ContainsKey(m_ObjectSet, dwNum))
-          break;
-
-        CPDF_Object* pReferred = m_pDocument->GetOrParseIndirectObject(dwNum);
-        if (GetValidator()->has_read_problems()) {
-          ASSERT(!pReferred);
-          ret_array.push_back(pObj);
-          ++count;
-          break;
-        }
-        m_ObjectSet.insert(dwNum);
-        if (pReferred)
-          new_obj_array.push_back(pReferred);
-
-        break;
-      }
-    }
-  }
-
-  if (count > 0) {
-    for (CPDF_Object* pObj : new_obj_array) {
-      CPDF_Reference* pRef = pObj->AsReference();
-      if (pRef && pdfium::ContainsKey(m_ObjectSet, pRef->GetRefObjNum()))
-        continue;
-      ret_array.push_back(pObj);
-    }
-    return false;
-  }
-
-  obj_array = new_obj_array;
-  return AreObjectsAvailable(obj_array, false, ret_array);
-}
-
 CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsDocAvail(
     DownloadHints* pHints) {
   if (!m_dwFileLen)
@@ -1137,44 +1065,6 @@ CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedData() {
   return m_bLinearedDataOK ? DataAvailable : DataNotAvailable;
 }
 
-bool CPDF_DataAvail::CheckPageAnnots(uint32_t dwPage) {
-  if (m_objs_array.empty()) {
-    m_ObjectSet.clear();
-
-    FX_SAFE_INT32 safePage = pdfium::base::checked_cast<int32_t>(dwPage);
-    CPDF_Dictionary* pPageDict = m_pDocument->GetPage(safePage.ValueOrDie());
-    if (!pPageDict)
-      return true;
-
-    CPDF_Object* pAnnots = pPageDict->GetObjectFor("Annots");
-    if (!pAnnots)
-      return true;
-
-    std::vector<CPDF_Object*> obj_array;
-    obj_array.push_back(pAnnots);
-    if (!AreObjectsAvailable(obj_array, false, m_objs_array))
-      return false;
-
-    m_objs_array.clear();
-    return true;
-  }
-
-  std::vector<CPDF_Object*> new_objs_array;
-  if (!AreObjectsAvailable(m_objs_array, false, new_objs_array)) {
-    m_objs_array = new_objs_array;
-    return false;
-  }
-  m_objs_array.clear();
-  return true;
-}
-
-CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::CheckLinearizedFirstPage(
-    uint32_t dwPage) {
-  if (!ValidatePage(dwPage))
-    return DataError;
-  return DataAvailable;
-}
-
 CPDF_DataAvail::DocAvailStatus CPDF_DataAvail::IsPageAvail(
     uint32_t dwPage,
     DownloadHints* pHints) {
diff --git a/core/fpdfapi/parser/cpdf_data_avail.h b/core/fpdfapi/parser/cpdf_data_avail.h
index a887d94901..2d46be1152 100644
--- a/core/fpdfapi/parser/cpdf_data_avail.h
+++ b/core/fpdfapi/parser/cpdf_data_avail.h
@@ -124,9 +124,6 @@ class CPDF_DataAvail final {
 
   static const int kMaxPageRecursionDepth = 1024;
 
-  bool AreObjectsAvailable(std::vector<CPDF_Object*>& obj_array,
-                           bool bParsePage,
-                           std::vector<CPDF_Object*>& ret_array);
   bool CheckDocStatus();
   bool CheckHeader();
   bool CheckFirstPage();
@@ -159,9 +156,7 @@ class CPDF_DataAvail final {
   bool LoadAllXref();
   bool LoadAllFile();
   DocAvailStatus CheckLinearizedData();
-  bool CheckPageAnnots(uint32_t dwPage);
 
-  DocAvailStatus CheckLinearizedFirstPage(uint32_t dwPage);
   bool CheckPage(uint32_t dwPage);
   bool LoadDocPages();
   bool LoadDocPage(uint32_t dwPage);
@@ -194,8 +189,6 @@ class CPDF_DataAvail final {
   PDF_DATAAVAIL_STATUS m_docStatus;
   FX_FILESIZE m_dwFileLen;
   CPDF_Document* m_pDocument;
-  std::set<uint32_t> m_ObjectSet;
-  std::vector<CPDF_Object*> m_objs_array;
   FX_FILESIZE m_Pos;
   FX_FILESIZE m_bufferOffset;
   uint32_t m_bufferSize;
-- 
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