comment on

Minor note:

A typical solution to this kind of problem would be to implement a sliding window

But he is trying to slide:

$START += $BUFF_SIZE - length($FIND);

Unfortunately, it seems that his 4th argument to read is understood as "offset into file", while, of course, it is "offset into buffer". If this

read $F, $BUFFER, $BUFF_SIZE, $START;

is replaced with

seek $F, $START, 0;
read $F, $BUFFER, $BUFF_SIZE;
[download]

then his sliding window works.

In reply to Re^2: Perl program to search files by vr
in thread Perl program to search files by harangzsolt33

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