dbfileext.cpp

ADO查看数据库工具的原码

// DBFileExt.cpp: implementation of the CDBFileExt class.
//
//////////////////////////////////////////////////////////////////////

#include "stdafx.h"
#include "DBFileExt.h"
#include "AfxDB.h"

#ifdef _DEBUG
#undef THIS_FILE
static char THIS_FILE[]=__FILE__;
#define new DEBUG_NEW
#endif
#include "DBFile.h"
//////////////////////////////////////////////////////////////////////
// Construction/Destruction
//////////////////////////////////////////////////////////////////////

CDBFileExt::CDBFileExt()
{

}

CDBFileExt::~CDBFileExt()
{

}
 
int CDBFileExt::AddInfo(char *info,int len)    // 添加信息区
{
	//modify by zy 20020730
	m_info.Info=NewInfo(len+1);
	memcpy(m_info.Info,info,len);
	m_info.InfoLen = len;
	return  WriteFileInfo();
}

int CDBFileExt::AddTableList(char *table,int num)       // 添加表区
{
	char *pTok;
	int i ;
	m_fieldhd.FieldNum = num;
	m_fieldname = NewFieldTag(num);  // 申请一个空间
	i=0;
	pTok=strtok(table,"|");
	sprintf( m_fieldname[i].FieldName,"%s",pTok);
	m_fieldname[i].FieldType =0;
	i++;
	while(pTok) {
		pTok=strtok(NULL,"|");
		if (pTok ==NULL) break;
		sprintf( m_fieldname[i].FieldName,"%s",pTok);
		m_fieldname[i].FieldType =0;
		i++;
		if (i>=num) break;
	}
	//表空间申请
	m_fielddata = NewFieldDataTag(num);
	return WriteField();
}

void  CDBFileExt::SetTableName(int fieldno, char *tablename,int type) 
{
	sprintf( m_fieldname[fieldno].FieldName,"%s",tablename);
	m_fieldname[fieldno].FieldType = type;
	return ;
}

void CDBFileExt::SetTableSize(int size)
{
	m_fieldname = NewFieldTag(size);  // 申请一个空间
	m_fielddata = NewFieldDataTag(size);
}

int CDBFileExt::AddTable()  // 写入表名区
{	return WriteField();  }


	/// int AddTableData(char *table,int len); // 添加域名
int CDBFileExt::AddRecord()                    // 添加一条记录    
{
	int ret = WriteRecord();
	//表空间申请
	m_fielddata = NewFieldDataTag(m_fieldhd.FieldNum );
	return ret;
}

int CDBFileExt::SetFieldData(int fieldno,char *buf,int len) //添加记录中每个域的数据
{
	m_fielddata[fieldno].DataBuff = NewDataBuff(fieldno,len);
	m_fielddata[fieldno].DataSize = len;
	memcpy(m_fielddata[fieldno].DataBuff,buf,len);
	return 0;
}
int CDBFileExt::AddIndex()
{	CreateIndex();	WriteIndex();	return 0; }

int  CDBFileExt::GetCount(){	return m_datahd.DataNum; }

int  CDBFileExt::GetFieldNum(){	return m_fieldhd.FieldNum; }

char *CDBFileExt::GetInfo(){ 	return m_info.Info;  }

char *CDBFileExt::GetFieldName(int fieldid)
{return m_fieldname[fieldid].FieldName;}


char *CDBFileExt::GetFieldData(int fieldid)
{
	if (m_fieldname[fieldid].FieldType==DBVT_BINARY) {
		sprintf( m_StrInfo,"<Bin: %d>",m_fielddata[fieldid].DataSize);
		return m_StrInfo;
	}
	return (char *)m_fielddata[fieldid].DataBuff;
}

char *CDBFileExt::GetFieldDataBin(int fieldid,int *len)
{
	*len = m_fielddata[fieldid].DataSize;
	return (char *)m_fielddata[fieldid].DataBuff;
}

int CDBFileExt::GetRecord(int i)
{
	m_curindex = i;	return ReadRecord();
}

void  CDBFileExt::SetFieldMask(int field, BOOL flag)
{ 	m_fieldmask[field]=flag; }

int CDBFileExt::IsDBFormat(char *buf)
{
	if (buf==NULL) return 0;
	if ((buf[0]!='E')||(buf[1]!='L')) return 0;
	return 1;
}