Re-land else-after-returns

core/src/fpdfapi/fpdf_parser/fpdf_parser_parser.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 <utility>
 #include <vector>
 
 #include "../../../include/fpdfapi/fpdf_module.h"
@@ skipping 1975 matching lines @@
         }
     }
     if (!bFirst) {
         buf.AppendByte((uint8_t)code);
     }
     return buf.GetByteString();
 }
 void CPDF_SyntaxParser::ToNextLine()
 {
     uint8_t ch;
-    while (1) {
-        if (!GetNextChar(ch)) {
-            return;
-        }
+    while (GetNextChar(ch)) {
         if (ch == '\n') {
-            return;
+            break;
         }
         if (ch == '\r') {
             GetNextChar(ch);
-            if (ch == '\n') {
-                return;
-            } else {
-                m_Pos --;
-                return;
+            if (ch != '\n') {
+                --m_Pos;
             }
+            break;
         }
     }
 }
 void CPDF_SyntaxParser::ToNextWord()
 {
     uint8_t ch;
     if (!GetNextChar(ch)) {
         return;
     }
     uint8_t type = PDF_CharType[ch];
@@ skipping 51 matching lines @@
         FX_FILESIZE SavedPos = m_Pos;
         CFX_ByteString nextword = GetNextWord(bIsNumber);
         if (bIsNumber) {
             CFX_ByteString nextword2 = GetNextWord(bIsNumber);
             if (nextword2 == FX_BSTRC("R")) {
                 FX_DWORD objnum = FXSYS_atoi(word);
                 if (bTypeOnly) {
                     return (CPDF_Object*)PDFOBJ_REFERENCE;
                 }
                 return new CPDF_Reference(pObjList, objnum);
-            } else {
-                m_Pos = SavedPos;
-                if (bTypeOnly) {
-                    return (CPDF_Object*)PDFOBJ_NUMBER;
-                }
-                return CPDF_Number::Create(word);
             }
-        } else {
-            m_Pos = SavedPos;
-            if (bTypeOnly) {
-                return (CPDF_Object*)PDFOBJ_NUMBER;
-            }
-            return CPDF_Number::Create(word);
         }
+        m_Pos = SavedPos;
+        if (bTypeOnly) {
+            return (CPDF_Object*)PDFOBJ_NUMBER;
+        }
+        return CPDF_Number::Create(word);
     }
     if (word == FX_BSTRC("true") || word == FX_BSTRC("false")) {
         if (bTypeOnly) {
             return (CPDF_Object*)PDFOBJ_BOOLEAN;
         }
         return CPDF_Boolean::Create(word == FX_BSTRC("true"));
     }
     if (word == FX_BSTRC("null")) {
         if (bTypeOnly) {
             return (CPDF_Object*)PDFOBJ_NULL;
@@ skipping 139 matching lines @@
             return (CPDF_Object*)PDFOBJ_INVALID;
         }
         return NULL;
     }
     if (bIsNumber) {
         FX_FILESIZE SavedPos = m_Pos;
         CFX_ByteString nextword = GetNextWord(bIsNumber);
         if (bIsNumber) {
             CFX_ByteString nextword2 = GetNextWord(bIsNumber);
             if (nextword2 == FX_BSTRC("R")) {
-                FX_DWORD objnum = FXSYS_atoi(word);
                 if (bTypeOnly) {
                     return (CPDF_Object*)PDFOBJ_REFERENCE;
                 }
+                FX_DWORD objnum = FXSYS_atoi(word);
                 return new CPDF_Reference(pObjList, objnum);
-            } else {
-                m_Pos = SavedPos;
-                if (bTypeOnly) {
-                    return (CPDF_Object*)PDFOBJ_NUMBER;
-                }
-                return CPDF_Number::Create(word);
             }
-        } else {
-            m_Pos = SavedPos;
-            if (bTypeOnly) {
-                return (CPDF_Object*)PDFOBJ_NUMBER;
-            }
-            return CPDF_Number::Create(word);
         }
+        m_Pos = SavedPos;
+        if (bTypeOnly) {
+            return (CPDF_Object*)PDFOBJ_NUMBER;
+        }
+        return CPDF_Number::Create(word);
     }
     if (word == FX_BSTRC("true") || word == FX_BSTRC("false")) {
         if (bTypeOnly) {
             return (CPDF_Object*)PDFOBJ_BOOLEAN;
         }
         return CPDF_Boolean::Create(word == FX_BSTRC("true"));
     }
     if (word == FX_BSTRC("null")) {
         if (bTypeOnly) {
             return (CPDF_Object*)PDFOBJ_NULL;
@@ skipping 849 matching lines @@
     if (!m_objs_array.GetSize()) {
         m_objs_array.RemoveAll();
         m_objnum_array.RemoveAll();
         CFX_PtrArray obj_array;
         obj_array.Append(m_arrayAcroforms);
         FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
         if (bRet) {
             m_objs_array.RemoveAll();
         }
         return bRet;
+    }
+    CFX_PtrArray new_objs_array;
+    FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+    if (bRet) {
+        int32_t iSize = m_arrayAcroforms.GetSize();
+        for (int32_t i = 0; i < iSize; ++i) {
+            ((CPDF_Object *)m_arrayAcroforms.GetAt(i))->Release();
+        }
+        m_arrayAcroforms.RemoveAll();
     } else {
-        CFX_PtrArray new_objs_array;
-        FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
-        if (bRet) {
-            int32_t iSize = m_arrayAcroforms.GetSize();
-            for (int32_t i = 0; i < iSize; ++i) {
-                ((CPDF_Object *)m_arrayAcroforms.GetAt(i))->Release();
-            }
-            m_arrayAcroforms.RemoveAll();
-        } else {
-            m_objs_array.RemoveAll();
-            m_objs_array.Append(new_objs_array);
-        }
-        return bRet;
+        m_objs_array.RemoveAll();
+        m_objs_array.Append(new_objs_array);
     }
+    return bRet;
 }
 FX_BOOL CPDF_DataAvail::CheckAcroForm(IFX_DownloadHints* pHints)
 {
     FX_BOOL bExist = FALSE;
     m_pAcroForm = GetObject(m_dwAcroFormObjNum, pHints, &bExist);
     if (!bExist) {
         m_docStatus = PDF_DATAAVAIL_PAGETREE;
         return TRUE;
     }
     if (!m_pAcroForm) {
@@ skipping 33 matching lines @@
             return LoadAllFile(pHints);
         case PDF_DATAAVAIL_ROOT:
             return CheckRoot(pHints);
         case PDF_DATAAVAIL_INFO:
             return CheckInfo(pHints);
         case PDF_DATAAVAIL_ACROFORM:
             return CheckAcroForm(pHints);
         case PDF_DATAAVAIL_PAGETREE:
             if (m_bTotalLoadPageTree) {
                 return CheckPages(pHints);
-            } else {
-                return LoadDocPages(pHints);
             }
+            return LoadDocPages(pHints);
         case PDF_DATAAVAIL_PAGE:
             if (m_bTotalLoadPageTree) {
                 return CheckPage(pHints);
-            } else {
-                m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
-                return TRUE;
             }
+            m_docStatus = PDF_DATAAVAIL_PAGE_LATERLOAD;
+            return TRUE;
         case PDF_DATAAVAIL_ERROR:
             return LoadAllFile(pHints);
         case PDF_DATAAVAIL_PAGE_LATERLOAD:
             m_docStatus = PDF_DATAAVAIL_PAGE;
         default:
             m_bDocAvail = TRUE;
             return TRUE;
     }
 }
 FX_BOOL CPDF_DataAvail::CheckPageStatus(IFX_DownloadHints* pHints)
@@ skipping 523 matching lines @@
             }
             m_dwXRefOffset = (FX_FILESIZE)FXSYS_atoi64(xrefpos_str);
             if (!m_dwXRefOffset || m_dwXRefOffset > m_dwFileLen) {
                 m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
                 return TRUE;
             }
             m_dwLastXRefOffset = m_dwXRefOffset;
             SetStartOffset(m_dwXRefOffset);
             m_docStatus = PDF_DATAAVAIL_CROSSREF;
             return TRUE;
-        } else {
-            m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
-            return TRUE;
         }
+        m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
+        return TRUE;
     }
     pHints->AddSegment(req_pos, dwSize);
     return FALSE;
 }
 int32_t CPDF_DataAvail::CheckCrossRefStream(IFX_DownloadHints* pHints, FX_FILESIZE &xref_offset)
 {
     xref_offset = 0;
     FX_DWORD req_size = (FX_DWORD)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
     if (m_pFileAvail->IsDataAvail(m_Pos, req_size)) {
         int32_t iSize = (int32_t)(m_Pos + req_size - m_dwCurrentXRefSteam);
@@ skipping 14 matching lines @@
             return 0;
         }
         CPDF_Dictionary* pDict = pObj->GetDict();
         CPDF_Object *pName = pDict ? pDict->GetElement(FX_BSTRC("Type")) : NULL;
         if (pName && pName->GetType() == PDFOBJ_NAME) {
             if (pName->GetString() == FX_BSTRC("XRef")) {
                 m_Pos += m_parser.m_Syntax.SavePos();
                 xref_offset = pObj->GetDict()->GetInteger(FX_BSTRC("Prev"));
                 pObj->Release();
                 return 1;
-            } else {
-                pObj->Release();
-                return -1;
             }
         }
         pObj->Release();
         return -1;
     }
     pHints->AddSegment(m_Pos, req_size);
     return 0;
 }
 inline void CPDF_DataAvail::SetStartOffset(FX_FILESIZE dwOffset)
 {
@@ skipping 133 matching lines @@
     FX_FILESIZE xref_offset = 0;
     int32_t nRet = CheckCrossRefStream(pHints, xref_offset);
     if (nRet == 1) {
         if (!xref_offset) {
             m_docStatus = PDF_DATAAVAIL_LOADALLCRSOSSREF;
         } else {
             m_dwCurrentXRefSteam = xref_offset;
             m_Pos = xref_offset;
         }
         return TRUE;
-    } else if (nRet == -1) {
+    }
+    if (nRet == -1) {
         m_docStatus = PDF_DATAAVAIL_ERROR;
     }
     return FALSE;
 }
 FX_BOOL CPDF_DataAvail::CheckCrossRef(IFX_DownloadHints* pHints)
 {
     int32_t iSize = 0;
     CFX_ByteString token;
     if (!GetNextToken(token)) {
         iSize = (int32_t)(m_Pos + 512 > m_dwFileLen ? m_dwFileLen - m_Pos : 512);
@@ skipping 82 matching lines @@
             } else {
                 m_dwPrevXRefOffset = xrefpos;
                 if (m_dwPrevXRefOffset >= m_dwFileLen) {
                     m_docStatus = PDF_DATAAVAIL_LOADALLFILE;
                 } else {
                     SetStartOffset(m_dwPrevXRefOffset);
                     m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
                 }
             }
             return TRUE;
-        } else {
-            m_dwPrevXRefOffset = 0;
-            m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
-            pTrailer->Release();
         }
+        m_dwPrevXRefOffset = 0;
+        m_docStatus = PDF_DATAAVAIL_TRAILER_APPEND;
+        pTrailer->Release();
         return TRUE;
     }
     pHints->AddSegment(m_Pos, iTrailerSize);
     return FALSE;
 }
 FX_BOOL CPDF_DataAvail::CheckPage(int32_t iPage, IFX_DownloadHints* pHints)
 {
     while (TRUE) {
         switch (m_docStatus) {
             case PDF_DATAAVAIL_PAGETREE:
@@ skipping 212 matching lines @@
     return FALSE;
 }
 FX_BOOL CPDF_DataAvail::LoadDocPages(IFX_DownloadHints* pHints)
 {
     if (!CheckUnkownPageNode(m_PagesObjNum, &m_pageNodes, pHints)) {
         return FALSE;
     }
     if (CheckPageCount(pHints)) {
         m_docStatus = PDF_DATAAVAIL_PAGE;
         return TRUE;
-    } else {
-        m_bTotalLoadPageTree = TRUE;
     }
+    m_bTotalLoadPageTree = TRUE;
     return FALSE;
 }
 FX_BOOL CPDF_DataAvail::LoadPages(IFX_DownloadHints* pHints)
 {
     while (!m_bPagesTreeLoad) {
         if (!CheckPageStatus(pHints)) {
             return FALSE;
         }
     }
     if (m_bPagesLoad) {
@@ skipping 45 matching lines @@
         if (!pAnnots) {
             return TRUE;
         }
         CFX_PtrArray obj_array;
         obj_array.Add(pAnnots);
         FX_BOOL bRet = IsObjectsAvail(obj_array, FALSE, pHints, m_objs_array);
         if (bRet) {
             m_objs_array.RemoveAll();
         }
         return bRet;
-    } else {
-        CFX_PtrArray new_objs_array;
-        FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
-        m_objs_array.RemoveAll();
-        if (!bRet) {
-            m_objs_array.Append(new_objs_array);
-        }
-        return bRet;
     }
+    CFX_PtrArray new_objs_array;
+    FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+    m_objs_array.RemoveAll();
+    if (!bRet) {
+        m_objs_array.Append(new_objs_array);
+    }
+    return bRet;
 }
 FX_BOOL CPDF_DataAvail::CheckLinearizedFirstPage(int32_t iPage, IFX_DownloadHints* pHints)
 {
     if (!m_bAnnotsLoad) {
         if (!CheckPageAnnots(iPage, pHints)) {
             return FALSE;
         }
         m_bAnnotsLoad = TRUE;
     }
-    if (m_bAnnotsLoad)
-        if (!CheckLinearizedData(pHints)) {
+    if (m_bAnnotsLoad) {
+        if (!CheckLinearizedData(pHints))
             return FALSE;
-        }
+    }
     m_bPageLoadedOK = FALSE;
     return TRUE;
 }
 FX_BOOL CPDF_DataAvail::HaveResourceAncestor(CPDF_Dictionary *pDict)
 {
     CFX_AutoRestorer<int> restorer(&s_CurrentDataAvailRecursionDepth);
     if (++s_CurrentDataAvailRecursionDepth > kMaxDataAvailRecursionDepth) {
         return FALSE;
     }
     CPDF_Object *pParent = pDict->GetElement("Parent");
@@ skipping 134 matching lines @@
 {
     if (!m_objs_array.GetSize()) {
         m_objs_array.RemoveAll();
         CFX_PtrArray obj_array;
         obj_array.Add(m_pPageResource);
         FX_BOOL bRet = IsObjectsAvail(obj_array, TRUE, pHints, m_objs_array);
         if (bRet) {
             m_objs_array.RemoveAll();
         }
         return bRet;
-    } else {
-        CFX_PtrArray new_objs_array;
-        FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
-        m_objs_array.RemoveAll();
-        if (!bRet) {
-            m_objs_array.Append(new_objs_array);
-        }
-        return bRet;
     }
+    CFX_PtrArray new_objs_array;
+    FX_BOOL bRet = IsObjectsAvail(m_objs_array, FALSE, pHints, new_objs_array);
+    m_objs_array.RemoveAll();
+    if (!bRet) {
+        m_objs_array.Append(new_objs_array);
+    }
+    return bRet;
 }
 void CPDF_DataAvail::GetLinearizedMainXRefInfo(FX_FILESIZE *pPos, FX_DWORD *pSize)
 {
     if (pPos) {
         *pPos = m_dwLastXRefOffset;
     }
     if (pSize) {
         *pSize = (FX_DWORD)(m_dwFileLen - m_dwLastXRefOffset);
     }
 }
@@ skipping 36 matching lines @@
     }
     m_number_array.InsertAt(iNext, dwObjNum);
 }
 FX_BOOL CPDF_SortObjNumArray::Find(FX_DWORD dwObjNum)
 {
     int32_t iNext = 0;
     return BinarySearch(dwObjNum, iNext);
 }
 FX_BOOL CPDF_SortObjNumArray::BinarySearch(FX_DWORD value, int32_t &iNext)
 {
-    int32_t iLen = m_number_array.GetSize();
     int32_t iLow = 0;
-    int32_t iHigh = iLen - 1;
-    int32_t iMid = 0;
+    int32_t iHigh = m_number_array.GetSize() - 1;
     while (iLow <= iHigh) {
-        iMid = (iLow + iHigh) / 2;
+        int32_t iMid = (iLow + iHigh) / 2;
         if (m_number_array.GetAt(iMid) == value) {
             iNext = iMid;
             return TRUE;
-        } else if (m_number_array.GetAt(iMid) > value) {
+        }
+        if (m_number_array.GetAt(iMid) > value) {
             iHigh = iMid - 1;
         } else if (m_number_array.GetAt(iMid) < value) {
             iLow = iMid + 1;
         }
     }
     iNext = iLow;
     return FALSE;
 }
 CPDF_PageNode::~CPDF_PageNode()
 {
     int32_t iSize = m_childNode.GetSize();
     for (int32_t i = 0; i < iSize; ++i) {
         CPDF_PageNode* pNode = (CPDF_PageNode*)m_childNode[i];
         delete pNode;
     }
     m_childNode.RemoveAll();
 }