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ZLog.pas
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ZLog.pas
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{Copyright (c) 2008 Ville Krumlinde
Permission is hereby granted, free of charge, to any person obtaining a copy
of this software and associated documentation files (the "Software"), to deal
in the Software without restriction, including without limitation the rights
to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
copies of the Software, and to permit persons to whom the Software is
furnished to do so, subject to the following conditions:
The above copyright notice and this permission notice shall be included in
all copies or substantial portions of the Software.
THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
THE SOFTWARE.}
unit ZLog;
//Log, debug and error unit
interface
{$ifndef minimal}
uses SysUtils;
{$endif}
type
TLogString = {$ifdef zlog}string{$else}PAnsiChar{$endif};
{$ifdef zlog}
TLogLevel = (lleNormal,lleWarning,lleError,lleUserTrace);
TLog = class
private
LastTime : single;
public
ID : integer;
Name : TLogString;
procedure Write(S : TLogString); overload;
procedure Write(S : TLogString; Level : TLogLevel); overload;
procedure Warning(S : TLogString);
procedure Error(S : TLogString);
procedure BeginTimer;
procedure EndTimer(S: TLogString);
end;
TLogReceiverFunc = procedure(Log : TLog; Mess : TLogString; Level : TLogLevel) of object;
{$endif}
{$ifndef minimal}
EZHalted = class(Exception);
{$endif}
//Fatal error, display message and exit program
//Use instead of raise exception
procedure ZHalt(ErrorMessage : TLogString);
procedure ZAssert(B : boolean; const ErrorMessage : TLogString);
{$ifdef zlog}
procedure SetReceiverFunc(F : TLogReceiverFunc);
function GetLog(const LogName : TLogString) : TLog;
{$endif}
implementation
uses ZPlatform
{$ifdef zlog},Contnrs,Classes{$endif};
procedure ZHalt(ErrorMessage : TLogString);
begin
{$ifdef minimal}
Platform_Error(PAnsiChar(ErrorMessage));
System.Halt;
{$else}
raise EZHalted.Create(ErrorMessage);
{$endif}
end;
procedure ZAssert(B : boolean; const ErrorMessage : TLogString);
begin
if not B then
ZHalt(ErrorMessage);
end;
{$ifdef zlog}
var
Logs : TObjectList;
LogLookup : TStringList;
ReceiverFunc : TLogReceiverFunc;
procedure InitLog;
begin
Logs := TObjectList.Create(True);
LogLookup := TStringList.Create;
LogLookup.Sorted := True;
end;
procedure SetReceiverFunc(F : TLogReceiverFunc);
begin
// Assert( not Assigned(ReceiverFunc) );
ReceiverFunc := F;
end;
function GetLog(const LogName : TLogString) : TLog;
var
I,J,LogId : integer;
Log : TLog;
begin
if LogLookup=nil then
InitLog;
I := LogLookup.IndexOf(LogName);
if I=-1 then
begin
//Give each a unique id by hashing logname
LogId := Length(LogName);
for J := 1 to Length(LogName) do
Inc(LogId,Ord(LogName[J]));
Log := TLog.Create;
Log.ID := LogId;
Log.Name := LogName;
LogLookup.AddObject(LogName,Log);
Logs.Add(Log);
end else
Log := TLog(LogLookup.Objects[I]);
Result := Log;
end;
{ TLog }
procedure TLog.Write(S: TLogString);
begin
Write(S,lleNormal);
end;
procedure TLog.Write(S : TLogString; Level : TLogLevel);
begin
if Assigned(ReceiverFunc) then
ReceiverFunc(Self,S,Level);
end;
procedure TLog.Warning(S: TLogString);
begin
Write(S,lleWarning);
end;
procedure TLog.Error(S: TLogString);
begin
Write(S,lleError);
end;
procedure TLog.BeginTimer;
begin
LastTime := Platform_GetTime;
end;
procedure TLog.EndTimer(S: TLogString);
begin
{$ifndef minimal}
Write( S + ': ' + SysUtils.FormatFloat('0.0###',Platform_GetTime - LastTime) );
{$endif}
end;
{$endif}
initialization
finalization
{$ifdef zlog}
Logs.Free;
LogLookup.Free;
{$endif}
end.