[reactos] 01/01: [KMTEST] Fix 3 Clang-Cl warnings about Status and Callbacks (#502)

[Serge Gautherie]

https://git.reactos.org/?p=reactos.git;a=commitdiff;h=c5d1638e1eae49af252ca…

commit c5d1638e1eae49af252ca677ef10f72d47579827
Author:     Serge Gautherie <32623169+SergeGautherie(a)users.noreply.github.com>
AuthorDate: Sun Feb 24 17:53:39 2019 +0100
Commit:     Timo Kreuzer <timo.kreuzer(a)reactos.org>
CommitDate: Sun Feb 24 17:53:38 2019 +0100

    [KMTEST] Fix 3 Clang-Cl warnings about Status and Callbacks (#502)
    
    * 1 "warning: variable 'Status' is used uninitialized whenever
'if' condition is false [-Wsometimes-uninitialized]"
    * 2 "warning: comparison of unsigned expression < 0 is always false
[-Wtautological-unsigned-zero-compare]"
    * Use a consistent type for "i" and fix a comment
    * Also update licence header.
    
    CORE-14306
---
 .../kmtests/kmtest_drv/kmtest_fsminifilter.c       | 29 +++++++++++++---------
 1 file changed, 17 insertions(+), 12 deletions(-)

diff --git a/modules/rostests/kmtests/kmtest_drv/kmtest_fsminifilter.c
b/modules/rostests/kmtests/kmtest_drv/kmtest_fsminifilter.c
index 3bb686de9e..3305e2fe77 100644
--- a/modules/rostests/kmtests/kmtest_drv/kmtest_fsminifilter.c
+++ b/modules/rostests/kmtests/kmtest_drv/kmtest_fsminifilter.c
@@ -1,9 +1,9 @@
 /*
- * PROJECT:         ReactOS kernel-mode tests - Filter Manager
- * LICENSE:         GPLv2+ - See COPYING in the top level directory
- * PURPOSE:         FS Mini-filter wrapper to host the filter manager tests
- * PROGRAMMER:      Thomas Faber &lt;thomas.faber(a)reactos.org&gt;
- *                  Ged Murphy &lt;ged.murphy(a)reactos.org&gt;
+ * PROJECT:     ReactOS kernel-mode tests - Filter Manager
+ * LICENSE:     GPL-2.0+ (https://spdx.org/licenses/GPL-2.0+)
+ * PURPOSE:     FS Mini-filter wrapper to host the filter manager tests
+ * COPYRIGHT:   Copyright 2017 Thomas Faber &lt;thomas.faber(a)reactos.org&gt;
+ *              Copyright 2017 Ged Murphy &lt;ged.murphy(a)reactos.org&gt;
  */
 
 #include <ntifs.h>
@@ -39,6 +39,7 @@ static PDRIVER_OBJECT TestDriverObject;
 static PDEVICE_OBJECT KmtestDeviceObject;
 static FILTER_DATA FilterData;
 static PFLT_OPERATION_REGISTRATION Callbacks = NULL;
+static ULONG CallbacksCount = 0;
 static PFLT_CONTEXT_REGISTRATION Contexts = NULL;
 
 static PFLT_CONNECT_NOTIFY FilterConnect = NULL;
@@ -296,6 +297,7 @@ FilterUnload(
     {
         ExFreePoolWithTag(Callbacks, KMTEST_FILTER_POOL_TAG);
         Callbacks = NULL;
+        CallbacksCount = 0;
     }
 
     return STATUS_SUCCESS;
@@ -337,7 +339,7 @@ FilterInstanceSetup(
     UNICODE_STRING VolumeName;
     ULONG ReportedSectorSize = 0;
     ULONG SectorSize = 0;
-    NTSTATUS Status;
+    NTSTATUS Status = STATUS_SUCCESS;
 
     PAGED_CODE();
 
@@ -437,7 +439,7 @@ KmtFilterRegisterCallbacks(
     _In_ CONST FLT_OPERATION_REGISTRATION *OperationRegistration)
 {
     ULONG Count = 0;
-    INT i;
+    ULONG i;
 
     if (Callbacks)
     {
@@ -461,7 +463,7 @@ KmtFilterRegisterCallbacks(
         return STATUS_INSUFFICIENT_RESOURCES;
     }
 
-    /* Copy the array, but using the our own pre/post callbacks */
+    /* Copy the array, but using our own pre/post callbacks */
     for (i = 0; i < Count; i++)
     {
         Callbacks[i].MajorFunction = OperationRegistration[i].MajorFunction;
@@ -473,6 +475,9 @@ KmtFilterRegisterCallbacks(
     /* Terminate the array */
     Callbacks[Count].MajorFunction = IRP_MJ_OPERATION_END;
 
+    /* Save the count of IRPs, not counting IRP_MJ_OPERATION_END last entry */
+    CallbacksCount = Count;
+
     return STATUS_SUCCESS;
 }
 
@@ -514,12 +519,12 @@ FilterPreOperation(
 {
     FLT_PREOP_CALLBACK_STATUS Status;
     UCHAR MajorFunction;
-    INT i;
+    ULONG i;
 
     Status = FLT_PREOP_SUCCESS_NO_CALLBACK;
     MajorFunction = Data->Iopb->MajorFunction;
 
-    for (i = 0; i < sizeof(Callbacks) / sizeof(Callbacks[0]); i++)
+    for (i = 0; i < CallbacksCount; i++)
     {
         if (MajorFunction == Callbacks[i].MajorFunction)
         {
@@ -543,12 +548,12 @@ FilterPostOperation(
 {
     FLT_POSTOP_CALLBACK_STATUS Status;
     UCHAR MajorFunction;
-    INT i;
+    ULONG i;
 
     Status = FLT_POSTOP_FINISHED_PROCESSING;
     MajorFunction = Data->Iopb->MajorFunction;
 
-    for (i = 0; i < sizeof(Callbacks) / sizeof(Callbacks[0]); i++)
+    for (i = 0; i < CallbacksCount; i++)
     {
         if (MajorFunction == Callbacks[i].MajorFunction)
         {