Remove CFX_BlockBufferchromium/3406

This CL removes the usage of CFX_BlockBuffer from CFX_XMLParser. The
block buffer has been replaced by a vector which is emptied out after
the characters are removed. This should use less memory when parsing XML
as the block buffer was previously storing all text characters seen in
the file.

Change-Id: I89568c664c762bb9feb034348524e5e86c2d9078
Reviewed-on: https://pdfium-review.googlesource.com/31275
Commit-Queue: dsinclair <dsinclair@chromium.org>
Reviewed-by: Henrique Nakashima <hnakashima@chromium.org>

1 files changed, 0 insertions, 50 deletions

diff --git a/core/fxcrt/cfx_blockbuffer.h b/core/fxcrt/cfx_blockbuffer.h
deleted file mode 100644
index 1673136643..0000000000
--- a/core/fxcrt/cfx_blockbuffer.h
+++ /dev/null
@@ -1,50 +0,0 @@
-// Copyright 2017 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
-
-#ifndef CORE_FXCRT_CFX_BLOCKBUFFER_H_
-#define CORE_FXCRT_CFX_BLOCKBUFFER_H_
-
-#include <stdint.h>
-
-#include <memory>
-#include <utility>
-#include <vector>
-
-#include "core/fxcrt/fx_string.h"
-
-class CFX_BlockBuffer {
- public:
-  CFX_BlockBuffer();
-  ~CFX_BlockBuffer();
-
-  bool InitBuffer();
-
-  std::pair<wchar_t*, size_t> GetAvailableBlock();
-  size_t GetAllocStep() const;
-  size_t GetDataLength() const { return m_DataLength; }
-  void IncrementDataLength() { m_DataLength++; }
-  bool IsEmpty() const { return m_DataLength == 0; }
-
-  void Reset(bool bReserveData) {
-    if (!bReserveData)
-      m_StartPosition = 0;
-    m_DataLength = 0;
-  }
-
-  void SetTextChar(size_t iIndex, wchar_t ch);
-  void DeleteTextChars(size_t iCount);
-  WideString GetTextData(size_t iStart, size_t iLength) const;
-
- private:
-  std::pair<size_t, size_t> TextDataIndex2BufIndex(const size_t iIndex) const;
-
-  std::vector<std::unique_ptr<wchar_t, FxFreeDeleter>> m_BlockArray;
-  size_t m_DataLength;
-  size_t m_BufferSize;
-  size_t m_StartPosition;
-};
-
-#endif  // CORE_FXCRT_CFX_BLOCKBUFFER_H_