C / C++ / MFC

16-Apr-04 1:11

I am parsing a file where each record is separeated by comma.
I am getting a minor problem here.
I am getting one extra empty field.
Here is the code.Pls help

CStdioFile myfile;
CString strRecord;
try
{
myfile.Open("C:\\YKUTANOOR\\VC++\\config.txt", CFile::modeRead );
myfile.SeekToBegin();
while(myfile.ReadString(strRecord)!=NULL)
{
CString resToken;
CString msgPromt;
int curPos= 0;
int countFields =0;
resToken= strRecord.Tokenize(",",curPos);
CString temp = resToken;
AfxMessageBox(resToken);
while (resToken != "")
{
resToken= strRecord.Tokenize(",",curPos);
}
}
}catch()
{
}

jmkhael16-Apr-04 2:43

jmkhael

16-Apr-04 2:43

Do an additional test

CStdioFile myfile;
CString strRecord;
try
{
myfile.Open("C:\\YKUTANOOR\\VC++\\config.txt", CFile::modeRead );
myfile.SeekToBegin();
while(myfile.ReadString(strRecord)!=NULL)
{
CString resToken;
CString msgPromt;
int curPos= 0;
int countFields =0;
resToken= strRecord.Tokenize(",",curPos);

if(!resToken.IsEmpty())
{
CString temp = resToken;
AfxMessageBox(resToken);
while (resToken != "")
{
resToken= strRecord.Tokenize(",",curPos);
}
}
}catch()
{
}
}

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

ykutanoor16-Apr-04 3:06

16-Apr-04 3:06

Thnx for the modified code.
But if u observe that the last message box(after fields are shown) are coming empty)
I need to stop this.
If u try ...
take a file LIKE this and use the above code.

1000,Y,1
2000,N,1
3000,N,1
4000,N,2

jmkhael16-Apr-04 3:24

jmkhael

16-Apr-04 3:24

This works:

CStdioFile myfile;
CString strRecord;

myfile.Open("C:\\config.txt", CFile::modeRead );
myfile.SeekToBegin();
while(myfile.ReadString(strRecord)!=NULL)
{
CString resToken;
CString msgPromt;
int curPos= 0;
int countFields =0;
while((curPos= strRecord.Find(",")) != -1)
{
resToken = strRecord.Left (curPos);
AfxMessageBox(resToken);

strRecord = strRecord.Mid (curPos + 1);
}

AfxMessageBox(strRecord);

Papa

while (TRUE)
Papa.WillLove ( Bebe ) ;

Stlan16-Apr-04 3:24

Stlan

16-Apr-04 3:24

Retrieve your strings inside the while loop and just before the call to the Tokenize function.

int Position = 0;<br />
CString Token(strRecord.Tokenize(_T(","), Position));<br />
<br />
while (!Token.IsEmpty())<br />
{<br />
TRACE(_T("[%s]\n"), Token);<br />
Token = strRecord.Tokenize(_T(","), Position);<br />
}

With your example file, then I get:

[1000]
[Y]
[1]
[2000]
[N]
[1]
[3000]
[N]
[1]
[4000]
[N]
[2]

CMapStringToString

ykutanoor16-Apr-04 0:50

16-Apr-04 0:50

I have used CMapStringToString where I have to map a string to another string.

I want TO KNOW how different CMapStringToString is from Cache Memory.
Because I am reading from the file in read mode and storing all the contents in
CMapStringToString.
Or Do I have to write another program to cache it.

Pls clarify

Jeff Bogan16-Apr-04 1:46

Jeff Bogan

16-Apr-04 1:46

Are you referring to the hashing that goes on automatically in the cache?

ykutanoor16-Apr-04 1:51

16-Apr-04 1:51

Yes,I am referring to the cache.

Jeff Bogan16-Apr-04 2:17

Jeff Bogan

16-Apr-04 2:17

Well that clears it up - NOT

ykutanoor16-Apr-04 2:23

16-Apr-04 2:23

My idea is read from a file and load in to memory as my app prefers frequent searching.
I am doing it by taking CMapStringToString.
What my question "Is cache memory different from storing in a hash table like CMapStringToString ?