Add type cast definitions for CPDF_Array.

core/src/fpdfapi/fpdf_page/fpdf_page_parser_old.cpp

 // Copyright 2014 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 "../../../include/fpdfapi/fpdf_page.h"
 #include "../../../include/fpdfapi/fpdf_module.h"
 #include "../../../include/fxcodec/fx_codec.h"
 #include "pageint.h"
@@ skipping 314 matching lines @@
                                                  FX_BOOL bDecode) {
   if (m_Pos == m_Size) {
     return NULL;
   }
   if (PDF_CharType[m_pBuf[m_Pos]] == 'W') {
     m_Pos++;
   }
   CFX_ByteString Decoder;
   CPDF_Dictionary* pParam = NULL;
   CPDF_Object* pFilter = pDict->GetElementValue(FX_BSTRC("Filter"));
-  if (pFilter == NULL) {
-  } else if (pFilter->GetType() == PDFOBJ_ARRAY) {
-    Decoder = ((CPDF_Array*)pFilter)->GetString(0);
-    CPDF_Array* pParams = pDict->GetArray(FX_BSTRC("DecodeParms"));
-    if (pParams) {
-      pParam = pParams->GetDict(0);
+  if (pFilter) {
+    if (CPDF_Array* pArray = pFilter->AsArray()) {
+      Decoder = pArray->GetString(0);
+      CPDF_Array* pParams = pDict->GetArray(FX_BSTRC("DecodeParms"));
+      if (pParams)
+        pParam = pParams->GetDict(0);
+    } else {
+      Decoder = pFilter->GetString();
+      pParam = pDict->GetDict(FX_BSTRC("DecodeParms"));
     }
-  } else {
-    Decoder = pFilter->GetString();
-    pParam = pDict->GetDict(FX_BSTRC("DecodeParms"));
   }
   FX_DWORD width = pDict->GetInteger(FX_BSTRC("Width"));
   FX_DWORD height = pDict->GetInteger(FX_BSTRC("Height"));
   FX_DWORD OrigSize = 0;
   if (pCSObj != NULL) {
     FX_DWORD bpc = pDict->GetInteger(FX_BSTRC("BitsPerComponent"));
     FX_DWORD nComponents = 1;
     CPDF_ColorSpace* pCS = pDoc->LoadColorSpace(pCSObj);
     if (pCS == NULL) {
       nComponents = 3;
@@ skipping 41 matching lines @@
     dwStreamSize =
         PDF_DecodeInlineStream(m_pBuf + m_Pos, m_Size - m_Pos, width, height,
                                Decoder, pParam, pData, dwDestSize);
     if ((int)dwStreamSize < 0) {
       FX_Free(pData);
       return NULL;
     }
     if (bDecode) {
       m_Pos += dwStreamSize;
       dwStreamSize = dwDestSize;
-      if (pFilter->GetType() == PDFOBJ_ARRAY) {
-        ((CPDF_Array*)pFilter)->RemoveAt(0);
+      if (CPDF_Array* pArray = pFilter->AsArray()) {
+        pArray->RemoveAt(0);
         CPDF_Array* pParams = pDict->GetArray(FX_BSTRC("DecodeParms"));
-        if (pParams) {
+        if (pParams)
           pParams->RemoveAt(0);
-        }
       } else {
         pDict->RemoveAt(FX_BSTRC("Filter"));
         pDict->RemoveAt(FX_BSTRC("DecodeParms"));
       }
     } else {
       FX_Free(pData);
       FX_DWORD dwSavePos = m_Pos;
       m_Pos += dwStreamSize;
       while (1) {
         FX_DWORD dwPrevPos = m_Pos;
@@ skipping 536 matching lines @@
   CPDF_Object* pContent =
       pPage->m_pFormDict->GetElementValue(FX_BSTRC("Contents"));
   if (pContent == NULL) {
     m_Status = Done;
     return;
   }
   if (pContent->GetType() == PDFOBJ_STREAM) {
     m_nStreams = 0;
     m_pSingleStream = new CPDF_StreamAcc;
     m_pSingleStream->LoadAllData((CPDF_Stream*)pContent, FALSE);
-  } else if (pContent->GetType() == PDFOBJ_ARRAY) {
-    CPDF_Array* pArray = (CPDF_Array*)pContent;
+  } else if (CPDF_Array* pArray = pContent->AsArray()) {
     m_nStreams = pArray->GetCount();
     if (m_nStreams == 0) {
       m_Status = Done;
       return;
     }
     m_pStreamArray = FX_Alloc(CPDF_StreamAcc*, m_nStreams);
   } else {
     m_Status = Done;
     return;
   }
@@ skipping 164 matching lines @@
       }
       m_Status = Done;
       return;
     }
     steps++;
     if (pPause && pPause->NeedToPauseNow()) {
       break;
     }
   }
 }