the method of farword seek is inefficient. consider case of 100000
lines and you want to display only 3-4 lines. better seek from end.
use a buffer[buf_size].
let size =filesize.
lc = 0;
while(lc <= given line input)
{
fseek(fp, size);
if(size < buf_size)
fread(fp, size, buffer);
else
fread(fp, size, buf_size);
parse buf_size for '\n'
if( \n is in buffer )
increment line counter(lc ++)
if(size < buf_size)
size -= buf_size
}
// you know the size, read the buffer one by one and print it
OR
// you could have put them while reading on to stack and print it out
now
On Aug 15, 8:46 am, Dave <[email protected]> wrote:
> Enter the lines into a FIFO queue as you read them. After you have
> enqueued n lines, dequeue a line every time you enqueue one, so that
> the queue will contain the last n (or fewer) lines of the file.
>
> Dave
>
> On Aug 13, 1:13 pm, amit <[email protected]> wrote:
>
>
>
> > I am trying using fseek but somehow its not working?- Hide quoted text -
>
> - Show quoted text -
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