packet.cpp

VC6。0用CMarkup类解析一个XML文件的例子。

#include "stdafx.h"
#include "Packet.h"


#define MAX_PATH 260

int SECellByName(DOMElement* pElement,void *pRef)
{
	string tmp1 = pElement->get_tag();
	string tmp2 = ((REF_INPUT *)pRef)->sTag;
	if(pElement->get_tag() == ((REF_INPUT *)pRef)->sTag)
	{
		((REF_INPUT *)pRef)->sFoundElement = pElement;
		return 1;
	}
		
	return 0;
}

int SECellByAttr(DOMElement* pElement,void *pRef)
{
	if(pElement->get_tag() == ((REF_INPUT *)pRef)->sTag)
	{
		string m_tmp_att;
		pElement->GetAttribute(((REF_INPUT *)pRef)->sAttr.c_str(), m_tmp_att);
		
		if(m_tmp_att == ((REF_INPUT *)pRef)->sValue.c_str())
		{
			((REF_INPUT *)pRef)->sFoundElement = pElement;
			return 1;		
		}
	}
	
	return 0;	
}

/**********************************
   class CPacket Implement
***********************************/
CPacket::CPacket()
{
	m_CurrentElement = NULL;
	m_FoundElement = NULL;
	m_bInitFlag = false; 	
}

CPacket::~CPacket()
{
	
}


DOMElement * CPacket::SearchElement(char *szNodeName)
{
	int begin = 0;
	
	DOMElement * pCurrentElement = NULL;
	//判断是否绝对路径
	if(szNodeName[0] == '/' || szNodeName[0] == '\\')
	{
		pCurrentElement = m_DomTree.getDocumentElement();
		begin = 1;	
	}
	else
	{
		if(m_CurrentElement != NULL)
			pCurrentElement = m_CurrentElement;
		else
		{
			pCurrentElement = m_DomTree.getDocumentElement();
			m_CurrentElement = pCurrentElement;
		}
	}
	
	if(pCurrentElement == NULL)
	{
		return NULL;
	}
	
	////////////////////////
	// 当前tag名
	m_FoundElement = NULL;

	vector<string> m_PathElement;
	vector<string>::iterator it;
	if(begin == 1)
	{
		split_bychar(m_PathElement,szNodeName + 1,'/');
	}
	else
	{
		split_bychar(m_PathElement,szNodeName,'/');
	}
	
	it = m_PathElement.begin();
	REF_INPUT in_sRef;	
	for(; it != m_PathElement.end(); it++)
	{
		memset(&in_sRef,0,sizeof(in_sRef));		

		m_FoundElement = NULL;
		in_sRef.sTag = (*it);
		LPENUM_CALLBACK_FUNC pFun = &(SECellByName);
		m_DomTree.EnumerateElements(pFun,pCurrentElement,(void *)&in_sRef);
		m_FoundElement = (DOMElement *)in_sRef.sFoundElement;
		if(!m_FoundElement)
			return NULL;
		pCurrentElement = m_FoundElement;
	}

	return m_FoundElement;	
}

DOMElement * CPacket::SearchElement(char *szNodeName,char *szProper,char *szId)
{
	int begin = 0;
	
	DOMElement * pCurrentElement = NULL;
	//判断是否绝对路径
	if(szNodeName[0] == '/' || szNodeName[0] == '\\')
	{
		pCurrentElement = m_DomTree.getDocumentElement();
		begin = 1;	
	}
	else
	{
		if(m_CurrentElement != NULL)
			pCurrentElement = m_CurrentElement;
		else
		{
			pCurrentElement = m_DomTree.getDocumentElement();
			m_CurrentElement = pCurrentElement;
		}
	}
	
	if(pCurrentElement == NULL)
	{
		return false;
	}
	
	////////////////////////
	// 当前tag名
	m_FoundElement = NULL;

	vector<string> m_PathElement;
	vector<string>::iterator it;
	if(begin == 1)
	{
		split_bychar(m_PathElement,szNodeName + 1,'/');
	}
	else
	{
		split_bychar(m_PathElement,szNodeName,'/');
	}
	
	m_CrrentAttr = szProper;
	m_CrrentValue = szId;
	
	it = m_PathElement.begin();
	for(; it != m_PathElement.end(); it++)
	{
		//m_CurrentTag = (*it);
		m_FoundElement = NULL;

		REF_INPUT in_sRef;
		in_sRef.sTag = (*it);
		
		if(it == m_PathElement.end() - 1)
			m_DomTree.EnumerateElements(SECellByAttr,pCurrentElement,(void *)&in_sRef);
		else
			m_DomTree.EnumerateElements(SECellByName,pCurrentElement,(void *)&in_sRef);
		
		m_FoundElement = (DOMElement *)in_sRef.sFoundElement;
		pCurrentElement = m_FoundElement;		
	}

	return m_FoundElement;
}

DOMElement * CPacket::CreateElement(char szNodeName[])
{
	int begin = 0;
	if(strcmp(szNodeName, ".\\") == 0 || strcmp(szNodeName, "./") == 0)
	{
		return m_CurrentElement;
	}

	DOMElement * pCurrentElement = NULL;
	DOMElement * pParentElement = NULL;
	
	//判断是否绝对路径
	if(szNodeName[0] == '/' || szNodeName[0] == '\\')
	{
		pCurrentElement = m_DomTree.getDocumentElement();
		begin = 1;	
	}
	else
	{
		if(m_CurrentElement != NULL)
			pCurrentElement = m_CurrentElement;
		else
		{
			pCurrentElement = m_DomTree.getDocumentElement();
			m_CurrentElement = pCurrentElement;
		}
	}
	
	pParentElement = pCurrentElement;

	string pTmpnode = szNodeName;
	
	int m_PosBgn = pTmpnode.find_last_of("/");

	if(m_PosBgn == string::npos)
	{
		pCurrentElement = pCurrentElement->AddChild(szNodeName,NULL);		
	}
	else if(begin == 1 && m_PosBgn == 0)
	{
		pCurrentElement = pCurrentElement->AddChild(szNodeName + 1,NULL);
	}
	else
	{
		
		m_PosBgn = 0;
		int m_PosCur = m_PosBgn;
		
		m_PosBgn = pTmpnode.find("/",m_PosCur + 1);
		while(m_PosBgn != string::npos)
		{			
			pCurrentElement = SearchElement((char *)pTmpnode.substr(0,m_PosBgn).c_str());
			if(!pCurrentElement)
			{
				pCurrentElement = pParentElement->AddChild(pTmpnode.substr(m_PosCur,m_PosBgn - m_PosCur).c_str(),NULL);
			}
			m_PosCur = m_PosBgn + 1;
			m_PosBgn = pTmpnode.find("/",m_PosCur);
			pParentElement = pCurrentElement;
		}
		m_PosBgn = pTmpnode.size();
		pCurrentElement = pParentElement->AddChild(pTmpnode.substr(m_PosCur,m_PosBgn - m_PosCur).c_str(),NULL);
		
	}
	
	//m_CurrentElement = pCurrentElement;
	return pCurrentElement;
}

bool CPacket::SetCurrentElement(char szNodeName[])
{
	DOMElement * pCurrElem = SearchElement(szNodeName);
	if(pCurrElem == NULL) return false;
	m_CurrentElement = pCurrElem;
	return true;
}

bool CPacket::GetElementValue(char * szNodeName, char * szOutBuf)
{
	DOMElement * elem = SearchElement(szNodeName);
	if(elem == NULL) return false;

	//XMLString::transcode(elem->getTextContent(), szOutBuf, TRANSCODESIZE);
	strcpy(szOutBuf,elem->getTextContent());
		
	return true;
}

bool CPacket::GetElementValue(char *szNodeName, char *szOutBuf, char *szProper, char *szId)
{
	DOMElement * elem = SearchElement(szNodeName,szProper,szId);
	if(elem == NULL) return false;

	//XMLString::transcode(elem->getTextContent(), szOutBuf, TRANSCODESIZE);
	strcpy(szOutBuf,elem->getTextContent());
		
	return true;
}

bool CPacket::GetElementAttr(DOMElement * pelem, char * szAttrName, string& szAttrValue)
{
	if(pelem == NULL)
	{
		return false;
	}
	pelem->GetAttribute(szAttrName, szAttrValue);
	
	return true;
}
	
bool CPacket::GetElementAttr(char * szNodeName, char * szAttrName, string& szAttrValue)
{
	DOMElement * elem = SearchElement(szNodeName);
	if(elem == NULL)
	{
		return false;
	}
	elem->GetAttribute(szAttrName, szAttrValue);
	
	return true;
}	
	
bool CPacket::SetElementAttr(char * szNodeName, char * szAttrName, char * szAttrValue)
{
	DOMElement * elem = SearchElement(szNodeName);
	if(elem == NULL)
	{
		return false;
	}
	elem->SetAttribute(szAttrName, szAttrValue);
	return true;
}

bool CPacket::SetElementAttr(DOMElement * pelem, char * szAttrName, char * szAttrValue)
{
	if(pelem == NULL) return false;
	pelem->SetAttribute(szAttrName, szAttrValue);
	return true;
}


bool CPacket::SetElementValue(char * szNodeName, char * szinBuf)
{
	DOMElement * elem = SearchElement(szNodeName);
	if(elem == NULL)
	{
		//m_LastError = AD_ERROR_ERROR;
		return false;
	}
	elem->setTextContent(szinBuf);
	return true;
}

bool CPacket::SetElementValue(DOMElement * pelem, char * szinBuf)
{
	if(pelem == NULL) return false;
	pelem->setTextContent(szinBuf);
	return true;
}

bool CPacket::Initialize()
{
	try
	{			
		DOMElement * pCurrentElement = m_DomTree.getDocumentElement();
		if(!pCurrentElement)
			return false;
			
	
		string rc = pCurrentElement->get_tag();
		if(rc.size() == 0)
			pCurrentElement->set_tag("Xml");
		m_CurrentElement = pCurrentElement;
		
	    m_bInitFlag = true;
	}
	catch(...)
	{
		
		return false;
	}
	return true;
}

void CPacket::ResetCurrentNode()
{
	m_CurrentElement = m_DomTree.getDocumentElement();
}

int CPacket::split_bychar(vector<string> & vec, const string& str, const char seperate)
{
	string::size_type pos1, pos2;
	string word;
	pos1 = pos2 = 0;
	vec.clear();
	while((pos2=str.find_first_of(seperate, pos1)) != string::npos)
	{
		word = str.substr(pos1, pos2-pos1);
		pos1 = pos2+1;
		if(!word.empty()) vec.push_back(word);
	}
	word = str.substr(pos1);
	if(!word.empty())vec.push_back(word);
	return 0;
}


int CPacket::BuiltTree(const char *pBuf, int nBufSize)
{
	int rc = m_DomTree.LoadXML(pBuf,nBufSize);
	m_CurrentElement = m_DomTree.getDocumentElement();
	return rc;
}

string CPacket::GetXml(DOMElement* pElement)
{

	m_DomTree.BuildXML(pElement);

	return m_DomTree.get_xml();
}

int CPacket::SetRootTag(string pTag)
{
	DOMElement* m_Element = m_DomTree.getDocumentElement();
	if(m_Element)
	{
		m_Element->set_tag(pTag.c_str());
		return 1;
	}
	else
	{
		return 0;
	}	
}

int CPacket::BuiltTree(MLPCSTR pXmlPath)
{
	int rc = m_DomTree.LoadXML(pXmlPath);
	m_CurrentElement = m_DomTree.getDocumentElement();
	return rc;
}

DOMElement * CPacket::SearchNextElement(bool pMoveNext)
{
	DOMElement * pCurrentElement = m_CurrentElement->GetNextElement();
	if(pMoveNext)
	{
		if(pCurrentElement)
			m_CurrentElement = pCurrentElement;
	}
	return pCurrentElement;
}

DOMElement * CPacket::SearchNextElement(char *szNodeName, char *szProper, char *szId)
{
	DOMElement * pCurrentElement = m_CurrentElement;
	if(!pCurrentElement)
		return NULL;
	string m_NodeName;
	string m_Proper;
	string m_Id;

	m_NodeName = szNodeName;

	if(szProper)
		m_Proper = szProper;
	if(szId)
		m_Id = szId;

	while((pCurrentElement = pCurrentElement->GetNextElement()) != NULL)
	{
		string tmp = pCurrentElement->getTextContent();
		if(pCurrentElement->get_tag() == m_NodeName)
		{
			if(szProper)
			{
				string AtrrValue;
				pCurrentElement->GetAttribute(m_Proper.c_str(),AtrrValue);
				
				if(m_Id != AtrrValue)
					continue;
			}
			break;
		}
	}
	return pCurrentElement;
}