[ekohl] 51558: [EVENTVWR/EVENTLOG] Fix a double off-by-one bug: - The eventlog service was reporting one event more than was available (+1). - The event viewer did not display the latest event from...

Author: ekohl
Date: Mon May  2 19:38:23 2011
New Revision: 51558

URL: http://svn.reactos.org/svn/reactos?rev=51558&view=rev
Log:
[EVENTVWR/EVENTLOG]
Fix a double off-by-one bug:
- The eventlog service was reporting one event more than was available (+1).
- The event viewer did not display the latest event from the eventlog service (-1).

See issue #6182 for more details.

Modified:
    trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c
    trunk/reactos/base/services/eventlog/rpc.c

Modified: trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/applications/mscutils…
==============================================================================
--- trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c [iso-8859-1] (original)
+++ trunk/reactos/base/applications/mscutils/eventvwr/eventvwr.c [iso-8859-1] Mon May  2
19:38:23 2011
@@ -503,7 +503,7 @@
     HWND hwndDlg;
     HANDLE hEventLog;
     EVENTLOGRECORD *pevlr;
-    DWORD dwRead, dwNeeded, dwThisRecord, dwTotalRecords = 0, dwCurrentRecord = 1,
dwRecordsToRead = 0, dwFlags, dwMaxLength;
+    DWORD dwRead, dwNeeded, dwThisRecord, dwTotalRecords = 0, dwCurrentRecord = 0,
dwRecordsToRead = 0, dwFlags, dwMaxLength;
     LPWSTR lpSourceName;
     LPWSTR lpComputerName;
     LPSTR lpData;

Modified: trunk/reactos/base/services/eventlog/rpc.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/base/services/eventlog/rpc…
==============================================================================
--- trunk/reactos/base/services/eventlog/rpc.c [iso-8859-1] (original)
+++ trunk/reactos/base/services/eventlog/rpc.c [iso-8859-1] Mon May  2 19:38:23 2011
@@ -199,6 +199,7 @@
     DWORD *NumberOfRecords)
 {
     PLOGHANDLE lpLogHandle;
+    DWORD dwRecords;
 
     lpLogHandle = ElfGetLogHandleEntryByHandle(LogHandle);
     if (!lpLogHandle)
@@ -206,7 +207,9 @@
         return STATUS_INVALID_HANDLE;
     }
 
-    *NumberOfRecords = lpLogHandle->LogFile->Header.CurrentRecordNumber;
+    dwRecords = lpLogHandle->LogFile->Header.CurrentRecordNumber;
+
+    *NumberOfRecords = (dwRecords > 0) ? (dwRecords - 1) : 0;
 
     return STATUS_SUCCESS;
 }