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{(*}
(*------------------------------------------------------------------------------
Delphi Code formatter source code
The Original Code is Log.pas, released April 2000.
The Initial Developer of the Original Code is Anthony Steele.
Portions created by Anthony Steele are Copyright (C) 1999-2008 Anthony Steele.
All Rights Reserved.
Contributor(s): Anthony Steele.
The contents of this file are subject to the Mozilla Public License Version 1.1
(the "License"). you may not use this file except in compliance with the License.
You may obtain a copy of the License at http://www.mozilla.org/NPL/
Software distributed under the License is distributed on an "AS IS" basis,
WITHOUT WARRANTY OF ANY KIND, either express or implied.
See the License for the specific language governing rights and limitations
under the License.
Alternatively, the contents of this file may be used under the terms of
the GNU General Public License Version 2 or later (the "GPL")
See http://www.gnu.org/licenses/gpl.html
------------------------------------------------------------------------------*)
{*)}
unit JcfLog;
{ Created AFS 2 Dec 1999
Log file }
{$I JcfGlobal.inc}
interface
{ log level: only have two levels at present
message and error
messages can be turned off, errors are always logged }
type
TLogLevel = (llMessage, llError);
type
TJCFLog = class(TObject)
private
fOpen: boolean;
fsLogFileName: string;
feLogLevel: TLogLevel;
{ worker vars }
fLog: TextFile;
{ worker procs }
procedure OpenLog;
protected
public
constructor Create(const psFileName: string);
destructor Destroy; override;
procedure Write(const ps: string; const peLogLevel: TLogLevel = llMessage);
procedure WriteError(const ps: string);
procedure EmptyLine;
procedure CloseLog;
// can't change file at runtime
property FileName: string Read fsLogFileName;
// can change log level
property LogLevel: TLogLevel Read feLogLevel Write feLogLevel;
end;
function Log: TJCFLog;
implementation
uses
SysUtils,
JcfRegistrySettings;
procedure TJCFLog.CloseLog;
begin
if fOpen then
begin
Flush(FLog);
CloseFile(FLog);
fOpen := false;
end;
end;
constructor TJCFLog.Create(const psFileName: string);
begin
inherited Create;
Assert(psFileName <> '');
fOpen := false;
fsLogFileName := psFileName;
OpenLog;
end;
destructor TJCFLog.Destroy;
begin
CloseLog;
inherited;
end;
procedure TJCFLog.EmptyLine;
begin
if fOpen = true then
WriteLn(Flog, '');
// no need to flush now - if theprogram dies right here, no new info is lost
end;
// this one always gets through
procedure TJCFLog.Write(const ps: string; const peLogLevel: TLogLevel = llMessage);
begin
if peLogLevel >= LogLevel then
if fOpen = true then
begin
WriteLn(Flog, ps);
Flush(FLog);
end;
end;
procedure TJCFLog.WriteError(const ps: string);
begin
if fOpen = true then
Write(ps, llError);
end;
procedure TJCFLog.OpenLog;
begin
if fOpen = false then
begin
try
AssignFile(FLog, fsLogFileName);
Rewrite(FLog);
{ do this no matter what the logging level, unless a log = off level is introduced }
WriteLn(Flog, 'Logging started at ' + FormatDateTime('dd mmm yyyy hh:mm:ss',
Date + Time));
fOpen := true;
except
end;
end;
end;
{ module var for singleton }
var
mcLog: TJCFLog;
function Log: TJCFLog;
begin
if mcLog = nil then
begin
mcLog := TJCFLog.Create(GetRegSettings.LogFileName);
end;
Result := mcLog;
end;
initialization
mcLog := nil;
finalization
FreeAndNil(mcLog);
end.
|
