// Copyright 2014 PDFium Authors. All rights reserved.
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// Use of this source code is governed by a BSD-style license that can be
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// found in the LICENSE file.
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// Original code copyright 2014 Foxit Software Inc. http://www.foxitsoftware.com
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#ifndef XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
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#define XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
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#include "xfa/fde/xml/cfx_saxreader.h"
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#include "xfa/fxfa/include/fxfa.h"
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class CXFA_SAXReaderHandler;
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class CXFA_ChecksumContext;
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class CXFA_SAXContext {
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public:
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CXFA_SAXContext() : m_eNode(CFX_SAXItem::Type::Unknown) {}
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CFX_ByteTextBuf m_TextBuf;
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CFX_ByteString m_bsTagName;
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CFX_SAXItem::Type m_eNode;
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};
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class CXFA_SAXReaderHandler {
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public:
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CXFA_SAXReaderHandler(CXFA_ChecksumContext* pContext);
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~CXFA_SAXReaderHandler();
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CXFA_SAXContext* OnTagEnter(const CFX_ByteStringC& bsTagName,
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CFX_SAXItem::Type eType,
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uint32_t dwStartPos);
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void OnTagAttribute(CXFA_SAXContext* pTag,
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const CFX_ByteStringC& bsAttri,
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const CFX_ByteStringC& bsValue);
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void OnTagBreak(CXFA_SAXContext* pTag);
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void OnTagData(CXFA_SAXContext* pTag,
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CFX_SAXItem::Type eType,
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const CFX_ByteStringC& bsData,
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uint32_t dwStartPos);
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void OnTagClose(CXFA_SAXContext* pTag, uint32_t dwEndPos);
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void OnTagEnd(CXFA_SAXContext* pTag,
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const CFX_ByteStringC& bsTagName,
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uint32_t dwEndPos);
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void OnTargetData(CXFA_SAXContext* pTag,
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CFX_SAXItem::Type eType,
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const CFX_ByteStringC& bsData,
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uint32_t dwStartPos);
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protected:
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void UpdateChecksum(FX_BOOL bCheckSpace);
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CXFA_ChecksumContext* m_pContext;
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CXFA_SAXContext m_SAXContext;
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};
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class CXFA_ChecksumContext {
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public:
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CXFA_ChecksumContext();
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~CXFA_ChecksumContext();
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void StartChecksum();
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void Update(const CFX_ByteStringC& bsText);
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FX_BOOL UpdateChecksum(IFX_FileRead* pSrcFile,
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FX_FILESIZE offset = 0,
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size_t size = 0);
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void FinishChecksum();
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CFX_ByteString GetChecksum() const;
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protected:
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CFX_SAXReader* m_pSAXReader;
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uint8_t* m_pByteContext;
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CFX_ByteString m_bsChecksum;
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};
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#endif // XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
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