Trolltech Home | Qt-interest Home | Recent Threads | All Threads | Author | Date
All threads index page 4

Qt-interest Archive, February 2007
Best way to compare file contents

• Subject: Best way to compare file contents
• From: "Michael Hardt" <mhardt@xxxxxxxxxxxxxxx>
• Date: Wed, 14 Feb 2007 10:56:34 -0500
• Delivered-to: qt-interest@trolltech.com
• Domainkey-signature: a=rsa-sha1; c=nofws; d=gmail.com; s=beta; h=received:message-id:date:from:reply-to:sender:to:subject:mime-version:content-type:x-google-sender-auth; b=oLJFmjPpkGW/8gC0idqKa4yx0h6SMLYAuM91CZUjh1YK/hQPQm0qo2HhU3ymLh/w59BsXcYlrdcAJUEzLENV1d7fsDDcXPUwiooebpXOnqNpQHpaUA9hcK7WBBSxtpaAZmDuP3XTsSouxGEwrNaNGd7WGpl8KJHATIKG5Dpg27g=
• List-help: <mailto:qt-interest-request@trolltech.com?subject=help>
• List-post: <mailto:qt-interest@trolltech.com>
• List-subscribe: <mailto:qt-interest-request@trolltech.com?subject=subscribe>
• List-unsubscribe: <mailto:qt-interest-request@trolltech.com?subject=unsubscribe>
• Reply-to: mhardt@xxxxxxxxxxxxxxx
• Resent-from: qt-interest@xxxxxxxxxxxxx
• Resent-message-id: <GRDiKB.A.hPB.4Ez0FB@esparsett>
• Resent-sender: qt-interest-request@xxxxxxxxxxxxx
• Sender: mhardt@xxxxxxxxx
• To: "Qt Interest List" <qt-interest@xxxxxxxxxxxxx>

I'm looking for a fast way to know whether the contents of two files are
identical or not.  I want to start reading two file streams, comparing them
as I go, then stop as soon as they differ.

I don't think QDataStream is right for this; should I be looping QFile.read()?
Is there an optimal size to read in each loop?

Michael