bool CIpInfo::LoadInfoFile(const char* lpszFilePathName)
{
bool bReturn = false;
ifstream hSrcFile(lpszFilePathName,ios_base::binary);
if(hSrcFile.is_open()&& !hSrcFile.fail())
{
hSrcFile.seekg(0,ios::end);
unsigned long dwNumberOfBytesToRead = hSrcFile.tellg();//Get file size
hSrcFile.seekg(0,ios::beg);
m_pDataBuffer = new unsigned char[dwNumberOfBytesToRead + 1];//would not be failed in win32?
memset(m_pDataBuffer,0,dwNumberOfBytesToRead+1);
if(m_pDataBuffer != NULL)
{
hSrcFile.read((char*)m_pDataBuffer,dwNumberOfBytesToRead);
unsigned long readBytes = hSrcFile.gcount();
if(readBytes > 0)
{
//calculate the ip information record count
unsigned long *pIntData = (unsigned long *)m_pDataBuffer;
unsigned long nBuffer_0 = *pIntData;//Start position of record infor in file
unsigned long nBuffer_4 = *(pIntData + 1);//End position of record infor in file
first_index_pos = *pIntData;
last_index_pos= *(pIntData+1);
nBuffer_4 -= nBuffer_0;
m_dwRecordCount = nBuffer_4 / 7;//IP record count
int nsuiv = nBuffer_4 % 7;
if(nsuiv == 0)//must be integral info struct,7 bytes
{
m_bInit = true;
bReturn = m_bInit;
}
}
if(hSrcFile.fail())
{
DEBUG_PRINT1("Error Opening File\n");
}
if(hSrcFile.bad())
{
DEBUG_PRINT1("Error reading File\n");
}
while(readBytes < dwNumberOfBytesToRead && hSrcFile.eof())
{
hSrcFile.read((char*)(m_pDataBuffer+readBytes),dwNumberOfBytesToRead-readBytes);
unsigned long cur_read = hSrcFile.gcount();
readBytes += cur_read;
}
}
hSrcFile.close();//close IP data file
}
if(!m_bInit)
FreeBuffer();//Verify the null buffer if we got some error
return bReturn;
}
