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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 _FXFA_FORMFILLER_CHECKSUM_IMP_H
#define _FXFA_FORMFILLER_CHECKSUM_IMP_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 IFX_SAXReaderHandler
{
public:
CXFA_SAXReaderHandler(CXFA_ChecksumContext *pContext);
virtual ~CXFA_SAXReaderHandler();
virtual void* OnTagEnter(const CFX_ByteStringC& bsTagName, FX_SAXNODE eType, FX_DWORD dwStartPos);
virtual void OnTagAttribute(void* pTag, const CFX_ByteStringC& bsAttri, const CFX_ByteStringC& bsValue);
virtual void OnTagBreak(void* pTag);
virtual void OnTagData(void* pTag, FX_SAXNODE eType, const CFX_ByteStringC& bsData, FX_DWORD dwStartPos);
virtual void OnTagClose(void* pTag, FX_DWORD dwEndPos);
virtual void OnTagEnd(void* pTag, const CFX_ByteStringC& bsTagName, FX_DWORD dwEndPos);
virtual void OnTargetData(void* pTag, FX_SAXNODE eType, const CFX_ByteStringC& bsData, FX_DWORD dwStartPos);
protected:
void UpdateChecksum(FX_BOOL bCheckSpace);
CXFA_ChecksumContext *m_pContext;
CXFA_SAXContext m_SAXContext;
};
class CXFA_ChecksumContext : public IXFA_ChecksumContext
{
public:
CXFA_ChecksumContext();
~CXFA_ChecksumContext();
virtual void Release()
{
delete this;
}
virtual FX_BOOL StartChecksum();
virtual FX_BOOL UpdateChecksum(IFX_FileRead *pSrcFile, FX_FILESIZE offset = 0, size_t size = 0);
virtual void FinishChecksum();
virtual void GetChecksum(CFX_ByteString &bsChecksum);
void Update(const CFX_ByteStringC& bsText);
protected:
IFX_SAXReader *m_pSAXReader;
uint8_t* m_pByteContext;
CFX_ByteString m_bsChecksum;
};
#endif
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