core/ difference with XFA (for information only).

core/src/fxcrt/fx_basic_buffer.cpp

Index: core/src/fxcrt/fx_basic_buffer.cpp
diff --git a/core/src/fxcrt/fx_basic_buffer.cpp b/core/src/fxcrt/fx_basic_buffer.cpp
index 3228ca3e7a61def83d95101e61f6809c60ab3b25..e5aa37c1bcfcab996cc1362f8dde8328e8a4c486 100644
--- a/core/src/fxcrt/fx_basic_buffer.cpp
+++ b/core/src/fxcrt/fx_basic_buffer.cpp
@@ -207,6 +207,131 @@ CFX_WideStringC CFX_WideTextBuf::GetWideString() const {
   return CFX_WideStringC((const FX_WCHAR*)m_pBuffer,
                          m_DataSize / sizeof(FX_WCHAR));
 }
+#ifdef PDF_ENABLE_XFA
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(uint8_t i) {
+  if (m_pStream) {
+    m_pStream->WriteBlock(&i, 1);
+  } else {
+    m_SavingBuf.AppendByte(i);
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(int i) {
+  if (m_pStream) {
+    m_pStream->WriteBlock(&i, sizeof(int));
+  } else {
+    m_SavingBuf.AppendBlock(&i, sizeof(int));
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(FX_DWORD i) {
+  if (m_pStream) {
+    m_pStream->WriteBlock(&i, sizeof(FX_DWORD));
+  } else {
+    m_SavingBuf.AppendBlock(&i, sizeof(FX_DWORD));
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(FX_FLOAT f) {
+  if (m_pStream) {
+    m_pStream->WriteBlock(&f, sizeof(FX_FLOAT));
+  } else {
+    m_SavingBuf.AppendBlock(&f, sizeof(FX_FLOAT));
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(const CFX_ByteStringC& bstr) {
+  int len = bstr.GetLength();
+  if (m_pStream) {
+    m_pStream->WriteBlock(&len, sizeof(int));
+    m_pStream->WriteBlock(bstr.GetPtr(), len);
+  } else {
+    m_SavingBuf.AppendBlock(&len, sizeof(int));
+    m_SavingBuf.AppendBlock(bstr.GetPtr(), len);
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(const FX_WCHAR* wstr) {
+  FX_STRSIZE len = FXSYS_wcslen(wstr);
+  if (m_pStream) {
+    m_pStream->WriteBlock(&len, sizeof(int));
+    m_pStream->WriteBlock(wstr, len);
+  } else {
+    m_SavingBuf.AppendBlock(&len, sizeof(int));
+    m_SavingBuf.AppendBlock(wstr, len);
+  }
+  return *this;
+}
+CFX_ArchiveSaver& CFX_ArchiveSaver::operator<<(const CFX_WideString& wstr) {
+  CFX_ByteString encoded = wstr.UTF16LE_Encode();
+  return operator<<(encoded);
+}
+void CFX_ArchiveSaver::Write(const void* pData, FX_STRSIZE dwSize) {
+  if (m_pStream) {
+    m_pStream->WriteBlock(pData, dwSize);
+  } else {
+    m_SavingBuf.AppendBlock(pData, dwSize);
+  }
+}
+CFX_ArchiveLoader::CFX_ArchiveLoader(const uint8_t* pData, FX_DWORD dwSize) {
+  m_pLoadingBuf = pData;
+  m_LoadingPos = 0;
+  m_LoadingSize = dwSize;
+}
+FX_BOOL CFX_ArchiveLoader::IsEOF() {
+  return m_LoadingPos >= m_LoadingSize;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(uint8_t& i) {
+  if (m_LoadingPos >= m_LoadingSize) {
+    return *this;
+  }
+  i = m_pLoadingBuf[m_LoadingPos++];
+  return *this;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(int& i) {
+  Read(&i, sizeof(int));
+  return *this;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(FX_DWORD& i) {
+  Read(&i, sizeof(FX_DWORD));
+  return *this;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(FX_FLOAT& i) {
+  Read(&i, sizeof(FX_FLOAT));
+  return *this;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(CFX_ByteString& str) {
+  if (m_LoadingPos + 4 > m_LoadingSize) {
+    return *this;
+  }
+  int len;
+  operator>>(len);
+  str.Empty();
+  if (len <= 0 || m_LoadingPos + len > m_LoadingSize) {
+    return *this;
+  }
+  FX_CHAR* buffer = str.GetBuffer(len);
+  FXSYS_memcpy(buffer, m_pLoadingBuf + m_LoadingPos, len);
+  str.ReleaseBuffer(len);
+  m_LoadingPos += len;
+  return *this;
+}
+CFX_ArchiveLoader& CFX_ArchiveLoader::operator>>(CFX_WideString& str) {
+  CFX_ByteString encoded;
+  operator>>(encoded);
+  str = CFX_WideString::FromUTF16LE((const unsigned short*)encoded.c_str(),
+                                    encoded.GetLength());
+  return *this;
+}
+FX_BOOL CFX_ArchiveLoader::Read(void* pBuf, FX_DWORD dwSize) {
+  if (m_LoadingPos + dwSize > m_LoadingSize) {
+    return FALSE;
+  }
+  FXSYS_memcpy(pBuf, m_pLoadingBuf + m_LoadingPos, dwSize);
+  m_LoadingPos += dwSize;
+  return TRUE;
+}
+#endif
 void CFX_BitStream::Init(const uint8_t* pData, FX_DWORD dwSize) {
   m_pData = pData;
   m_BitSize = dwSize * 8;