Writing data at end of file

[dominochmiel]

I have big text file.I need to write small number of bytes at end of this file. Can I do it without reading whole file??
Thanks for help.

 

[Totte]

Easily, just open the file and read the file lenght and do a FILESEEK to the end. Depending on the way you use to open there can be an append-mode (open existing file and append to end of file...), just use suitable mode.

Totte

 

[butthead]

FILE *file;

if ((file = fopen("Logfile.txt", "a&quot) != NULL)
{
fprintf (file, "%s", string);
}

tomcruz.net

 

[Supernat03]

Both valid ways. Here's an example of the first way mentioned:

int FilePtr = FileOpen("Filename.txt", fmOpenWrite);
int Buffer = 2;

if (FilePtr)
{
FileSeek(FilePtr, 0, 2);
FileWrite(FilePtr, &Buffer, sizeof(Buffer));
FileClose(FilePtr);
}

If you need to write to the file really fast, I suggest using the c routines in the second example given.

Chris