Hello FPC-Pascal, Monday, April 11, 2011, 7:55:01 PM, you wrote:
>> The idea is easy, instead reading forward, you read backwards in >> blocks of, say, 64 Kb and count lines back. If not enougth lines you >> insert another 64 Kb before and so on. Average line is usually less >> than 100 bytes, so each 64 Kb are usually more than 600 lines. Read of >> 64 Kb usually takes the same time as read any lower amount when the >> block is 4096 bytes aligned. MG> You can not really read backwards. You can use MG> something like TFileStream.Seek(-4096,soEnd). I think that the "read backwards in blocks" already stated that fact, but nice annotation. -- Best regards, José _______________________________________________ fpc-pascal maillist - fpc-pascal@lists.freepascal.org http://lists.freepascal.org/mailman/listinfo/fpc-pascal
