Need to read the last 4 lines (txt) of a very large log file 100M bytes,
100k lines or more lots of times - of course I can read through the file in
the normal way but this is rather slow. Is there a way to 'read lines from
the end'? I note that unix tail or its port to windows does this very fast
Hello FPC-Pascal,
Monday, April 11, 2011, 6:32:20 PM, you wrote:
JL> Need to read the last 4 lines (txt) of a very large log file 100M bytes,
JL> 100k lines or more lots of times - of course I can read through the file in
JL> the normal way but this is rather slow. Is there a way to 'read lines
On Mon, 11 Apr 2011 19:45:10 +0200
José Mejuto wrote:
> Hello FPC-Pascal,
>
> Monday, April 11, 2011, 6:32:20 PM, you wrote:
>
> JL> Need to read the last 4 lines (txt) of a very large log file 100M bytes,
> JL> 100k lines or more lots of times - of course I can read through the file
> in
> J
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
Hello.
Following program:
program a;
{$mode delphi}
type
generic TGen = class end;
TSpc = specialize TGen;
begin
end.
compiles with FPC 2.4.2, but not with 2.5.1 rev. 17306:
a.pas(4,11) Fatal: Syntax error, "=" expected but "identifier TGEN" found
a.pas(5,21) Error: Identifier not found "sp
12.04.2011 4:22, cobines wrote:
Hello.
Following program:
program a;
{$mode delphi}
type
generic TGen = class end;
TSpc = specialize TGen;
begin
end.
compiles with FPC 2.4.2, but not with 2.5.1 rev. 17306:
a.pas(4,11) Fatal: Syntax error, "=" expected but "identifier TGEN" found
a.pas(
Since FPC in Delphi mode supports Delphi style generics syntax, FPC's own
generics syntax was removed from this mode. You can still use it from ObjFPC
mode.
--
View this message in context:
http://free-pascal-general.1045716.n5.nabble.com/generic-specialize-keywords-in-mode-delphi-in-FPC-trunk-tp
2011/4/12 Paul Ishenin :
> 12.04.2011 4:22, cobines wrote:
>>
>> Hello.
>>
>> Following program:
>>
>> program a;
>> {$mode delphi}
>> type
>> generic TGen = class end;
>> TSpc = specialize TGen;
>> begin
>> end.
>>
>> compiles with FPC 2.4.2, but not with 2.5.1 rev. 17306:
>>
>> a.pas(4,11) F
So the idea is to open file eg as file of array [1:65536] of char or
something similar, seek & read to end of file, then go through the last
array converting to strings by finding crlfs correct? Is this the simplest
way? If not any outline code?
John
On , José Mejuto wrote:
Hello FPC-Pas
On 04/11/2011 12:32 PM, John Lee wrote:
Need to read the last 4 lines (txt) of a very large log file 100M
bytes, 100k lines or more lots of times - of course I can read
through the file in the normal way but this is rather slow. Is there a
way to 'read lines from the end'? I note that unix tai
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