Re: Large text files and searching text
The routine to read the file into a buffer below was given to me a while ago
but now generates two warnings.
warning C4244: 'argument' : conversion from 'ULONGLONG' to 'INT_PTR',
possible loss of data
buffer.SetSize(in.GetLength());
warning C4244: 'argument' : conversion from 'INT_PTR' to 'UINT', possible
loss of data
if((INT_PTR)in.Read(buffer.GetData(), buffer.GetSize()) !=
buffer.GetSize()){
CByteArray buffer;
buffer.SetSize(in.GetLength());
if((INT_PTR)in.Read(buffer.GetData(), buffer.GetSize()) !=
buffer.GetSize()){
DWORD err = ::GetLastError();
CString msg;
msg.Format(_T("Error reading file: %d"), err);
AfxMessageBox(msg);
in.Close();
return;
}
in.Close();
"Joseph M. Newcomer" <newcomer@flounder.com> wrote in message
news:30aa14l3tljlmdq84k829dosa00q0vni3o@4ax.com...
We've had this discussion previously, and somebody actually wrote you code
to do it.
joe
On Sun, 27 Apr 2008 17:47:27 GMT, "Kahlua" <kahlua@right.here> wrote:
So far so good.
Please see last portion of code for what I still need to do.
void CMyDlg::OnLbnSelchangeList1()
{
int nSelect;
nSelect = c_List1.GetCurSel();
CString cSelect;
c_List1.GetText( nSelect, cSelect );
CString JobFile;
JobFile = _T("C:\\MyFolder\\"); //re-apply main part of
original path
JobFile += cSelect; //add filename selected
JobFile += _T(".txt"); //re-apply file extension
CString mess;
mess.Format(_T("Would you like to load \"%s\" as top ?"), cSelect);
int a = AfxMessageBox(mess, MB_ICONQUESTION | MB_YESNO);
if(a != IDYES)
return;
CFile in;
if(!in.Open(JobFile, CFile::modeRead)){
DWORD err = ::GetLastError();
CString msg;
msg.Format(_T("Error opening file: %d"), err);
AfxMessageBox(msg);
return;
}
//read entire file into string
//search string for a "keyword"
//copy x bytes from this point forward to another string
}
Please advise how to do the 3 things I need above.
The text file can be as large as 100mb and the copied portion can be as
large as 10mb.
Thanks,
Joseph M. Newcomer [MVP]
email: newcomer@flounder.com
Web: http://www.flounder.com
MVP Tips: http://www.flounder.com/mvp_tips.htm