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;
; NT LOG Lib for Purebasic
;
;-----------------------------------------------------------------------------
;     (c) 2004-2005 Siegfried Rings
;
;     This library is free software; you can redistribute it and/or
;     modify it under the terms of the GNU Lesser General Public
;     License as published by the Free Software Foundation; either
;     version 2.1 of the License, Or (at your option) any later version.
; 
;     This library is distributed in the hope that it will be useful,
;     but WITHOUT ANY WARRANTY; without even the implied warranty of
;     MERCHANTABILITY Or FITNESS For A PARTICULAR PURPOSE.  See the GNU
;     Lesser General Public License For more details. 
;----------------------------------------------------------------------------- 

; The types of events that can be logged.
#EVENTLOG_SUCCESS               = 0
#EVENTLOG_ERROR_TYPE            = 1
#EVENTLOG_WARNING_TYPE          = 2
#EVENTLOG_INFORMATION_TYPE      = 4
#EVENTLOG_AUDIT_SUCCESS         = 8
#EVENTLOG_AUDIT_FAILURE         = $10

; Defines For the Read flags For Eventlogging

#EVENTLOG_SEQUENTIAL_READ = $1
#EVENTLOG_SEEK_READ       = $2
#EVENTLOG_FORWARDS_READ   = $4
#EVENTLOG_BACKWARDS_READ  = $8

 Global Record
 Global MaxLogs
 Global glbEVENTLOG_APP_NAME.s
 Global glbcomputer.s
 Global Mem1
; Global LOG.EVENTLOGRECORD

ProcedureDLL WriteLog(EVENTLOG_APP_NAME.s,EventMessage.s,Type,computer.s);Write a Record into the Log

wNumStrings.w=0 ;did not work

lpString=@EventMessage.s
lprawdata=@EventMessage.s
rawdata=Len(EventMessage.s)
lLogAPIRetVal.l = RegisterEventSource_(computer.s, EVENTLOG_APP_NAME.s)
If lLogAPIRetVal <> 0 
 Debug lLogAPIRetVal
 ; ClearError() 
 ;lReturnX = ReportEvent_(lLogAPIRetVal,wdummy1 , wdummy2, 0, SI,wdummy4, 0, @EventMessage.s,0)       
 lReturnX = ReportEvent_(lLogAPIRetVal,#EVENTLOG_INFORMATION_TYPE ,0, CMessageTyp, 0,wNumStrings, rawdata, lparray,lprawdata)       
 
 ;wNumStrings=1
 ;lReturnX = ReportEvent_(lLogAPIRetVal,#EVENTLOG_ERROR_TYPE,0, Type, 0,wNumStrings, 0, lpString,0)       
 
 DeregisterEventSource_(lLogAPIRetVal)
 If lReturnX=0
  MessageRequester("Info","Fehler " + Chr(13)+Chr(10)+GetErrorDLL() ,0)
 Else
   ;MessageRequester("Info","Okay",0)
 EndIf
EndIf 
EndProcedure

ProcedureDLL GetLogs(EVENTLOG_APP_NAME.s,computer.s);Get count of logs
LogHandle=OpenEventLog_(computer.s,EVENTLOG_APP_NAME.s)
If LogHandle
 Result=GetNumberOfEventLogRecords_(LogHandle,@anzahl.l)
 CloseEventLog_(LogHandle)
EndIf
ProcedureReturn Anzahl
EndProcedure

ProcedureDLL ReadLog(Record1,EVENTLOG_APP_NAME.s,computer.s);Read a specific Log
LogHandle=OpenEventLog_(computer.s,EVENTLOG_APP_NAME.s)
If LogHandle
 pcbBytesNeeded=5000 ;SizeOf(EVENTLOGRECORD)
 If Mem1=0 
  Mem1=GlobalAlloc_(#GMEM_FIXED,pcbBytesNeeded)
 EndIf
 ReadEventLog_(LogHandle,#EVENTLOG_FORWARDS_READ|#EVENTLOG_SEEK_READ ,Record1,Mem1,pcbBytesNeeded,@byteswritten,@neededBytes)
 ;GlobalFree_(Buffer)
 CloseEventLog_(LogHandle)
EndIf
EndProcedure

ProcedureDLL ClearLogs(EVENTLOG_APP_NAME.s,computer.s);Delete all Logs
LogHandle=OpenEventLog_(@computer.s,@EVENTLOG_APP_NAME.s)
If LogHandle
 ClearEventLog_(Loghandle,0)
 CloseEventLog_(LogHandle)
EndIf
EndProcedure

ProcedureDLL ExamineLogs(EVENTLOG_APP_NAME.s,computer.s);Examine LOG's
 Record=1
 MaxLogs=GetLogs(EVENTLOG_APP_NAME.s,"")
 glbEVENTLOG_APP_NAME=EVENTLOG_APP_NAME.s
 glbcomputer.s=computer.s
EndProcedure

ProcedureDLL NextLogs();Try to get next LogRecord (Null i EOF)
 If Record<MaxLogs
  Record+1
  ReadLog(Record,glbEVENTLOG_APP_NAME.s,glbcomputer.s)
  ProcedureReturn Record
 Else
  ProcedureReturn 0
 EndIf   
EndProcedure
ProcedureDLL Log_End();Releases memory at end
If Mem1<>0
 GlobalFree_(Mem1)
EndIf
EndProcedure

; Structure EVENTLOGRECORD
;   Length.l
;   Reserved.l
;   RecordNumber.l
;   TimeGenerated.l
;   TimeWritten.l
;   EventID.l
;   EventType.w
;   NumStrings.w
;   EventCategory.w
;   ReservedFlags.w
;   ClosingRecordNumber.l
;   StringOffset.l
;   UserSidLength.l
;   UserSidOffset.l
;   DataLength.l
;   DataOffset.l
; EndStructure
ProcedureDLL GetLogTime();Get Time in seconds, elapsed from 1970
If Mem1
 ProcedureReturn PeekL(Mem1+12)
EndIf
EndProcedure

ProcedureDLL GetLogEventID();Get an ID
If Mem1
 ProcedureReturn PeekL(Mem1+20)
EndIf
EndProcedure

ProcedureDLL GetLogType();Get the Type of Log-entry
If Mem1
 ProcedureReturn PeekL(Mem1+24)
EndIf
EndProcedure

ProcedureDLL.s GetLogSourceName();Get the Name of the registered Source(File) which generates the error
If Mem1
 ;Debug PeekL(Mem1)
 ProcedureReturn PeekS(Mem1+56)
EndIf
EndProcedure

ProcedureDLL.s GetLogComputerName();Get the Computername which write the log
If Mem1
 ProcedureReturn PeekS(Mem1+57+Len(PeekS(Mem1+56)))
EndIf
EndProcedure

ProcedureDLL.s GetLogString();Get a detailed LogDescription
If Mem1
 anz=PeekW(Mem1+26)
 sAdr=Mem1+PeekL(Mem1+36);Stringadresse
 sdummy.s=""
 For I=1 To anz
  sdummy2.s=PeekS(sadr)
  sdummy.s=sdummy.s + sdummy2.s
  sadr=sadr+Len(sdummy2.s)+1
 Next I
 ProcedureReturn sdummy.s
EndIf
EndProcedure

ProcedureDLL GetLogData(Bufferadress.l); If thee is a DataBlock, you get back the Len of Data and the Datin the specific Adress
If Mem1
 anzahl=PeekL(Mem1+48);Datalength
 If anzahl>0 And Bufferadress>0
  CopyMemory(Mem1+PeekL(Mem1+52),Bufferadress,anzahl)
 EndIf
EndIf
ProcedureReturn Anzahl
EndProcedure

CMessageTyp=$1003
computer.s="ringsnb"
computer.s=""
EVENTLOG_APP_NAME.s="SR_DEBUG"
EventMessage.s="Aber Hallo !"+Hex(Random(100))
WriteLog(EVENTLOG_APP_NAME.s,EventMessage.s,CMessageTyp,computer)
anzahl=GetLogs(EVENTLOG_APP_NAME.s,"")
Debug anzahl
For I=1 To anzahl
 ReadLog(I,EVENTLOG_APP_NAME.s,"")
 Debug GetLogSourceName()
 Debug GetLogComputerName()
 ;Debug GetlogeventID()
 ;Debug GetLogString()
Next i
;ClearLogs(EVENTLOG_APP_NAME.s,"")
;Debug GetLogs(EVENTLOG_APP_NAME.s,"")