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// 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
#ifndef XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
#define XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
#include "xfa/fgas/xml/fgas_sax.h"
#include "xfa/fxfa/include/fxfa.h"
class CXFA_SAXReaderHandler;
class CXFA_ChecksumContext;
class CXFA_SAXContext {
public:
CXFA_SAXContext() : m_eNode(FX_SAXNODE_Unknown) {}
CFX_ByteTextBuf m_TextBuf;
CFX_ByteString m_bsTagName;
FX_SAXNODE m_eNode;
};
class CXFA_SAXReaderHandler {
public:
CXFA_SAXReaderHandler(CXFA_ChecksumContext* pContext);
~CXFA_SAXReaderHandler();
void* OnTagEnter(const CFX_ByteStringC& bsTagName,
FX_SAXNODE eType,
uint32_t dwStartPos);
void OnTagAttribute(void* pTag,
const CFX_ByteStringC& bsAttri,
const CFX_ByteStringC& bsValue);
void OnTagBreak(void* pTag);
void OnTagData(void* pTag,
FX_SAXNODE eType,
const CFX_ByteStringC& bsData,
uint32_t dwStartPos);
void OnTagClose(void* pTag, uint32_t dwEndPos);
void OnTagEnd(void* pTag,
const CFX_ByteStringC& bsTagName,
uint32_t dwEndPos);
void OnTargetData(void* pTag,
FX_SAXNODE eType,
const CFX_ByteStringC& bsData,
uint32_t dwStartPos);
protected:
void UpdateChecksum(FX_BOOL bCheckSpace);
CXFA_ChecksumContext* m_pContext;
CXFA_SAXContext m_SAXContext;
};
class CXFA_ChecksumContext {
public:
CXFA_ChecksumContext();
~CXFA_ChecksumContext();
void StartChecksum();
void Update(const CFX_ByteStringC& bsText);
FX_BOOL UpdateChecksum(IFX_FileRead* pSrcFile,
FX_FILESIZE offset = 0,
size_t size = 0);
void FinishChecksum();
CFX_ByteString GetChecksum() const;
protected:
CFX_SAXReader* m_pSAXReader;
uint8_t* m_pByteContext;
CFX_ByteString m_bsChecksum;
};
#endif // XFA_FXFA_INCLUDE_XFA_CHECKSUM_H_
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