Fix a leak in CJBig2_Context.

core/src/fxcodec/jbig2/JBig2_Context.cpp

Index: core/src/fxcodec/jbig2/JBig2_Context.cpp
diff --git a/core/src/fxcodec/jbig2/JBig2_Context.cpp b/core/src/fxcodec/jbig2/JBig2_Context.cpp
index b70054171da8cb001610a002008f51af68febcee..396ae5cd11e9e9e81b7c9b176fe3c23dea1d114e 100644
--- a/core/src/fxcodec/jbig2/JBig2_Context.cpp
+++ b/core/src/fxcodec/jbig2/JBig2_Context.cpp
@@ -21,11 +21,10 @@ CJBig2_Context* CJBig2_Context::CreateContext(
     FX_DWORD dwGlobalLength,
     const uint8_t* pData,
     FX_DWORD dwLength,
-    int32_t nStreamType,
     std::list<CJBig2_CachePair>* pSymbolDictCache,
     IFX_Pause* pPause) {
   return new CJBig2_Context(pGlobalData, dwGlobalLength, pData, dwLength,
-                            nStreamType, pSymbolDictCache, pPause);
+                            pSymbolDictCache, pPause);
 }
 void CJBig2_Context::DestroyContext(CJBig2_Context* pContext) {
   delete pContext;
@@ -34,18 +33,16 @@ CJBig2_Context::CJBig2_Context(const uint8_t* pGlobalData,
                                FX_DWORD dwGlobalLength,
                                const uint8_t* pData,
                                FX_DWORD dwLength,
-                               int32_t nStreamType,
                                std::list<CJBig2_CachePair>* pSymbolDictCache,
                                IFX_Pause* pPause) {
   if (pGlobalData && (dwGlobalLength > 0)) {
-    m_pGlobalContext =
-        new CJBig2_Context(NULL, 0, pGlobalData, dwGlobalLength,
-                           JBIG2_EMBED_STREAM, pSymbolDictCache, pPause);
+    m_pGlobalContext = new CJBig2_Context(
+        nullptr, 0, pGlobalData, dwGlobalLength, pSymbolDictCache, pPause);
   } else {
-    m_pGlobalContext = NULL;
+    m_pGlobalContext = nullptr;
   }
+
   m_pStream = new CJBig2_BitStream(pData, dwLength);
-  m_nStreamType = nStreamType;
   m_nState = JBIG2_OUT_OF_PAGE;
   m_pPage = NULL;
   m_bBufSpecified = FALSE;
@@ -76,40 +73,6 @@ CJBig2_Context::~CJBig2_Context() {
   m_pStream = NULL;
 }
 
-int32_t CJBig2_Context::decodeFile(IFX_Pause* pPause) {
-  if (m_pStream->getByteLeft() < 8)
-    return JBIG2_ERROR_TOO_SHORT;
-
-  const uint8_t fileID[] = {0x97, 0x4A, 0x42, 0x32, 0x0D, 0x0A, 0x1A, 0x0A};
-  if (JBIG2_memcmp(m_pStream->getPointer(), fileID, 8) != 0)
-    return JBIG2_ERROR_FILE_FORMAT;
-
-  m_pStream->offset(8);
-
-  uint8_t cFlags;
-  if (m_pStream->read1Byte(&cFlags) != 0)
-    return JBIG2_ERROR_TOO_SHORT;
-
-  if (!(cFlags & 0x02)) {
-    FX_DWORD dwTemp;
-    if (m_pStream->readInteger(&dwTemp) != 0)
-      return JBIG2_ERROR_TOO_SHORT;
-
-    if (dwTemp > 0) {
-      m_PageInfoList.clear();
-      m_PageInfoList.resize(dwTemp);
-    }
-  }
-
-  if (cFlags & 0x01) {
-    m_nStreamType = JBIG2_SQUENTIAL_STREAM;
-    return decode_SquentialOrgnazation(pPause);
-  }
-
-  m_nStreamType = JBIG2_RANDOM_STREAM;
-  return decode_RandomOrgnazation_FirstPage(pPause);
-}
-
 int32_t CJBig2_Context::decode_SquentialOrgnazation(IFX_Pause* pPause) {
   int32_t nRet;
   if (m_pStream->getByteLeft() <= 0)
@@ -226,27 +189,7 @@ int32_t CJBig2_Context::Continue(IFX_Pause* pPause) {
   m_ProcessingStatus = FXCODEC_STATUS_DECODE_READY;
   int32_t nRet;
   if (m_PauseStep <= 1) {
-    switch (m_nStreamType) {
-      case JBIG2_FILE_STREAM:
-        nRet = decodeFile(pPause);
-        break;
-      case JBIG2_SQUENTIAL_STREAM:
-        nRet = decode_SquentialOrgnazation(pPause);
-        break;
-      case JBIG2_RANDOM_STREAM:
-        if (m_bFirstPage) {
-          nRet = decode_RandomOrgnazation_FirstPage(pPause);
-        } else {
-          nRet = decode_RandomOrgnazation(pPause);
-        }
-        break;
-      case JBIG2_EMBED_STREAM:
-        nRet = decode_EmbedOrgnazation(pPause);
-        break;
-      default:
-        m_ProcessingStatus = FXCODEC_STATUS_ERROR;
-        return JBIG2_ERROR_STREAM_TYPE;
-    }
+    nRet = decode_EmbedOrgnazation(pPause);
   } else if (m_PauseStep == 2) {
     nRet = decode_SquentialOrgnazation(pPause);
   } else if (m_PauseStep == 3) {
@@ -272,19 +215,7 @@ int32_t CJBig2_Context::Continue(IFX_Pause* pPause) {
   }
   return nRet;
 }
-int32_t CJBig2_Context::getFirstPage(CJBig2_Image** image, IFX_Pause* pPause) {
-  int32_t nRet;
-  m_bFirstPage = TRUE;
-  m_PauseStep = 0;
-  if (m_pGlobalContext) {
-    nRet = m_pGlobalContext->decode_EmbedOrgnazation(pPause);
-    if (nRet != JBIG2_SUCCESS) {
-      return nRet;
-    }
-  }
-  m_bBufSpecified = FALSE;
-  return Continue(pPause);
-}
+
 CJBig2_Segment* CJBig2_Context::findSegmentByNumber(FX_DWORD dwNumber) {
   CJBig2_Segment* pSeg;
   if (m_pGlobalContext) {