Use std::vector as internal storage for CPDF_Array

core/fpdfapi/fpdf_parser/cpdf_array.cpp

 // Copyright 2016 PDFium Authors. All rights reserved.
 // Use of this source code is governed by a BSD-style license that can be
 // found in the LICENSE file.
 
 // Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_array.h"
 
 #include "core/fpdfapi/fpdf_parser/include/cpdf_name.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_number.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_reference.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_stream.h"
 #include "core/fpdfapi/fpdf_parser/include/cpdf_string.h"
 
 CPDF_Array::CPDF_Array() {}
 
 CPDF_Array::~CPDF_Array() {
-  int size = m_Objects.GetSize();
-  CPDF_Object** pList = m_Objects.GetData();
-  for (int i = 0; i < size; i++) {
-    if (pList[i])
-      pList[i]->Release();
+  for (auto& it : m_Objects) {

[Tom Sepez, 2016/04/08 20:13:53]

Now that this is a STL array, we can use 
std::vector<std::unique_ptr<CPDF_Object, ReleaseDeleter<CPDF_Object>>> m_Objects


and this goes away

+    if (it)
+      it->Release();
   }
 }
 
 CPDF_Object::Type CPDF_Array::GetType() const {
   return ARRAY;
 }
 
 CPDF_Array* CPDF_Array::GetArray() const {
   // The method should be made non-const if we want to not be const.
   // See bug #234.
   return const_cast<CPDF_Array*>(this);
 }
 
 bool CPDF_Array::IsArray() const {
   return true;
 }
 
 CPDF_Array* CPDF_Array::AsArray() {
   return this;
 }
 
 const CPDF_Array* CPDF_Array::AsArray() const {
   return this;
 }
 
 CPDF_Object* CPDF_Array::Clone(FX_BOOL bDirect) const {
   CPDF_Array* pCopy = new CPDF_Array();
   for (size_t i = 0; i < GetCount(); i++) {
-    CPDF_Object* value = m_Objects.GetAt(i);
-    pCopy->m_Objects.Add(value->Clone(bDirect));
+    CPDF_Object* value = m_Objects.at(i);
+    pCopy->m_Objects.push_back(value->Clone(bDirect));
   }
   return pCopy;
 }
 
 CFX_FloatRect CPDF_Array::GetRect() {
   CFX_FloatRect rect;
-  if (!IsArray() || m_Objects.GetSize() != 4)
+  if (!IsArray() || m_Objects.size() != 4)
     return rect;
 
   rect.left = GetNumberAt(0);
   rect.bottom = GetNumberAt(1);
   rect.right = GetNumberAt(2);
   rect.top = GetNumberAt(3);
   return rect;
 }
 
 CFX_Matrix CPDF_Array::GetMatrix() {
   CFX_Matrix matrix;
-  if (!IsArray() || m_Objects.GetSize() != 6)
+  if (!IsArray() || m_Objects.size() != 6)
     return matrix;
 
   matrix.Set(GetNumberAt(0), GetNumberAt(1), GetNumberAt(2), GetNumberAt(3),
              GetNumberAt(4), GetNumberAt(5));
   return matrix;
 }
 
-CPDF_Object* CPDF_Array::GetObjectAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+CPDF_Object* CPDF_Array::GetObjectAt(size_t i) const {
+  if (i >= m_Objects.size())
     return nullptr;
-  return m_Objects.GetAt(i);
+  return m_Objects.at(i);
 }
 
-CPDF_Object* CPDF_Array::GetDirectObjectAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+CPDF_Object* CPDF_Array::GetDirectObjectAt(size_t i) const {
+  if (i >= m_Objects.size())
     return nullptr;
-  return m_Objects.GetAt(i)->GetDirect();
+  return m_Objects.at(i)->GetDirect();
 }
 
-CFX_ByteString CPDF_Array::GetStringAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+CFX_ByteString CPDF_Array::GetStringAt(size_t i) const {
+  if (i >= m_Objects.size())
     return CFX_ByteString();
-  return m_Objects.GetAt(i)->GetString();
+  return m_Objects.at(i)->GetString();
 }
 
-CFX_ByteStringC CPDF_Array::GetConstStringAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+CFX_ByteStringC CPDF_Array::GetConstStringAt(size_t i) const {
+  if (i >= m_Objects.size())
     return CFX_ByteStringC();
-  return m_Objects.GetAt(i)->GetConstString();
+  return m_Objects.at(i)->GetConstString();
 }
 
-int CPDF_Array::GetIntegerAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+int CPDF_Array::GetIntegerAt(size_t i) const {
+  if (i >= m_Objects.size())
     return 0;
-  return m_Objects.GetAt(i)->GetInteger();
+  return m_Objects.at(i)->GetInteger();
 }
 
-FX_FLOAT CPDF_Array::GetNumberAt(uint32_t i) const {
-  if (i >= (uint32_t)m_Objects.GetSize())
+FX_FLOAT CPDF_Array::GetNumberAt(size_t i) const {
+  if (i >= m_Objects.size())
     return 0;
-  return m_Objects.GetAt(i)->GetNumber();
+  return m_Objects.at(i)->GetNumber();
 }
 
-CPDF_Dictionary* CPDF_Array::GetDictAt(uint32_t i) const {
+CPDF_Dictionary* CPDF_Array::GetDictAt(size_t i) const {
   CPDF_Object* p = GetDirectObjectAt(i);
   if (!p)
     return NULL;
   if (CPDF_Dictionary* pDict = p->AsDictionary())
     return pDict;
   if (CPDF_Stream* pStream = p->AsStream())
     return pStream->GetDict();
   return NULL;
 }
 
-CPDF_Stream* CPDF_Array::GetStreamAt(uint32_t i) const {
+CPDF_Stream* CPDF_Array::GetStreamAt(size_t i) const {
   return ToStream(GetDirectObjectAt(i));
 }
 
-CPDF_Array* CPDF_Array::GetArrayAt(uint32_t i) const {
+CPDF_Array* CPDF_Array::GetArrayAt(size_t i) const {
   return ToArray(GetDirectObjectAt(i));
 }
 
-void CPDF_Array::RemoveAt(uint32_t i, uint32_t nCount) {
-  if (i >= (uint32_t)m_Objects.GetSize())
+void CPDF_Array::RemoveAt(size_t i, size_t nCount) {
+  if (i >= m_Objects.size())
     return;
 
-  if (nCount <= 0 || nCount > m_Objects.GetSize() - i)
+  if (nCount <= 0 || nCount > m_Objects.size() - i)
     return;
 
-  for (uint32_t j = 0; j < nCount; ++j) {
-    if (CPDF_Object* p = m_Objects.GetAt(i + j))
+  for (size_t j = 0; j < nCount; ++j) {
+    if (CPDF_Object* p = m_Objects.at(i + j))
       p->Release();
   }
-  m_Objects.RemoveAt(i, nCount);
+  m_Objects.erase(m_Objects.begin() + i, m_Objects.begin() + i + nCount);
 }
 
-void CPDF_Array::SetAt(uint32_t i,
+void CPDF_Array::SetAt(size_t i,
                        CPDF_Object* pObj,
                        CPDF_IndirectObjectHolder* pObjs) {
   ASSERT(IsArray());
-  ASSERT(i < (uint32_t)m_Objects.GetSize());
-  if (i >= (uint32_t)m_Objects.GetSize())
+  ASSERT(i < m_Objects.size());
+  if (i >= m_Objects.size())
     return;
-  if (CPDF_Object* pOld = m_Objects.GetAt(i))
+  if (CPDF_Object* pOld = m_Objects.at(i))
     pOld->Release();
   if (pObj->GetObjNum()) {
     ASSERT(pObjs);
     pObj = new CPDF_Reference(pObjs, pObj->GetObjNum());
   }
-  m_Objects.SetAt(i, pObj);
+  m_Objects[i] = pObj;
 }
 
-void CPDF_Array::InsertAt(uint32_t index,
+void CPDF_Array::InsertAt(size_t index,
                           CPDF_Object* pObj,
                           CPDF_IndirectObjectHolder* pObjs) {
   if (pObj->GetObjNum()) {
     ASSERT(pObjs);
     pObj = new CPDF_Reference(pObjs, pObj->GetObjNum());
   }
-  m_Objects.InsertAt(index, pObj);
+  if (index >= m_Objects.size()) {
+    // Allocate space first.
+    m_Objects.resize(index + 1, nullptr);
+    m_Objects[index] = pObj;
+  } else {
+    // Directly insert.
+    m_Objects.insert(m_Objects.begin() + index, pObj);
+  }
 }
 
 void CPDF_Array::Add(CPDF_Object* pObj, CPDF_IndirectObjectHolder* pObjs) {
   if (pObj->GetObjNum()) {
     ASSERT(pObjs);
     pObj = new CPDF_Reference(pObjs, pObj->GetObjNum());
   }
-  m_Objects.Add(pObj);
+  m_Objects.push_back(pObj);
 }
 
 void CPDF_Array::AddName(const CFX_ByteString& str) {
   ASSERT(IsArray());
   Add(new CPDF_Name(str));
 }
 
 void CPDF_Array::AddString(const CFX_ByteString& str) {
   ASSERT(IsArray());
   Add(new CPDF_String(str, FALSE));
 }
 
 void CPDF_Array::AddInteger(int i) {
   ASSERT(IsArray());
   Add(new CPDF_Number(i));
 }
 
 void CPDF_Array::AddNumber(FX_FLOAT f) {
   ASSERT(IsArray());
   CPDF_Number* pNumber = new CPDF_Number(f);
   Add(pNumber);
 }
 
 void CPDF_Array::AddReference(CPDF_IndirectObjectHolder* pDoc,
                               uint32_t objnum) {
   ASSERT(IsArray());
   Add(new CPDF_Reference(pDoc, objnum));
 }