[janderwald] 42439: - Add a few parameters check - Calculate resource list size with FIELD_OFFSET macro - Fix a big bug in IResourceList_fnAddEntryFromParent which didnt copy the untranslated resource list entry

Author: janderwald
Date: Thu Aug  6 23:45:10 2009
New Revision: 42439

URL: http://svn.reactos.org/svn/reactos?rev=42439&view=rev
Log:
- Add a few parameters check
- Calculate resource list size with FIELD_OFFSET macro
- Fix a big bug in IResourceList_fnAddEntryFromParent which didnt copy the untranslated
resource list entry

Modified:
    trunk/reactos/drivers/wdm/audio/backpln/portcls/resource.c

Modified: trunk/reactos/drivers/wdm/audio/backpln/portcls/resource.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/drivers/wdm/audio/backpln/…
==============================================================================
--- trunk/reactos/drivers/wdm/audio/backpln/portcls/resource.c [iso-8859-1] (original)
+++ trunk/reactos/drivers/wdm/audio/backpln/portcls/resource.c [iso-8859-1] Thu Aug  6
23:45:10 2009
@@ -22,6 +22,7 @@
     POOL_TYPE PoolType;
     PCM_RESOURCE_LIST TranslatedResourceList;
     PCM_RESOURCE_LIST UntranslatedResourceList;
+    ULONG NumberOfEntries;
 } IResourceListImpl;
 
 /*
@@ -100,7 +101,7 @@
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
-    return This->TranslatedResourceList->List[0].PartialResourceList.Count;
+    return This->NumberOfEntries;
 }
 
 ULONG
@@ -114,6 +115,12 @@
     PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
+
+    if (!This->TranslatedResourceList)
+    {
+        /* no resource list */
+        return 0;
+    }
 
     /* I guess the translated and untranslated lists will be same length? */
     for (Index = 0; Index <
This->TranslatedResourceList->List[0].PartialResourceList.Count; Index ++ )
@@ -143,6 +150,12 @@
     PCM_PARTIAL_RESOURCE_DESCRIPTOR PartialDescriptor;
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
+
+    if (!This->TranslatedResourceList)
+    {
+        /* no resource list */
+        return NULL;
+    }
 
     for (DescIndex = 0; DescIndex <
This->TranslatedResourceList->List[0].PartialResourceList.Count; DescIndex ++ )
     {
@@ -175,6 +188,12 @@
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
+    if (!This->UntranslatedResourceList)
+    {
+        /* no resource list */
+        return NULL;
+    }
+
     for (DescIndex = 0; DescIndex <
This->UntranslatedResourceList->List[0].PartialResourceList.Count; DescIndex ++ )
     {
         PartialDescriptor =
&This->UntranslatedResourceList->List[0].PartialResourceList.PartialDescriptors[DescIndex];
@@ -200,17 +219,29 @@
     IN  PCM_PARTIAL_RESOURCE_DESCRIPTOR Untranslated)
 {
     PCM_RESOURCE_LIST NewUntranslatedResources, NewTranslatedResources;
-    ULONG NewTranslatedSize, NewUntranslatedSize;
-    IResourceListImpl * This = (IResourceListImpl*)iface;
-
-    ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
-
-    NewTranslatedSize = sizeof(CM_RESOURCE_LIST) +
This->TranslatedResourceList[0].List->PartialResourceList.Count *
sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
+    ULONG NewTranslatedSize, NewUntranslatedSize, TranslatedSize, UntranslatedSize,
ResourceCount;
+    IResourceListImpl * This = (IResourceListImpl*)iface;
+
+    ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
+
+    /* calculate translated resource list size */
+    ResourceCount =
This->TranslatedResourceList->List[0].PartialResourceList.Count;
+    NewTranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount+1]);
+    TranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount]);
+
+
     NewTranslatedResources = AllocateItem(This->PoolType, NewTranslatedSize,
TAG_PORTCLASS);
     if (!NewTranslatedResources)
         return STATUS_INSUFFICIENT_RESOURCES;
 
-    NewUntranslatedSize = sizeof(CM_RESOURCE_LIST) +
This->UntranslatedResourceList[0].List->PartialResourceList.Count *
sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
+
+    /* calculate untranslated resouce list size */
+    ResourceCount =
This->UntranslatedResourceList->List[0].PartialResourceList.Count;
+    NewUntranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount+1]);
+    UntranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount]);
+
+
+    /* allocate untranslated resource list size */
     NewUntranslatedResources = AllocateItem(This->PoolType, NewUntranslatedSize,
TAG_PORTCLASS);
     if (!NewUntranslatedResources)
     {
@@ -218,34 +249,28 @@
         return STATUS_INSUFFICIENT_RESOURCES;
     }
 
-    RtlCopyMemory(NewTranslatedResources, This->TranslatedResourceList,
sizeof(CM_RESOURCE_LIST));
-    if (This->TranslatedResourceList[0].List->PartialResourceList.Count > 1)
-    {
-       
RtlCopyMemory(&NewTranslatedResources->List[0].PartialResourceList.PartialDescriptors[0],
-                     
&This->TranslatedResourceList->List[0].PartialResourceList.PartialDescriptors[0],

-                      sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) *
This->TranslatedResourceList->List[0].PartialResourceList.Count);
-    }
-
-   
RtlCopyMemory(&NewTranslatedResources->List[0].PartialResourceList.PartialDescriptors[This->TranslatedResourceList[0].List->PartialResourceList.Count],
Translated, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
-
-    RtlCopyMemory(NewUntranslatedResources, This->UntranslatedResourceList,
sizeof(CM_RESOURCE_LIST));
-    if (This->UntranslatedResourceList[0].List->PartialResourceList.Count > 1)
-    {
-       
RtlCopyMemory(&NewUntranslatedResources->List[0].PartialResourceList.PartialDescriptors[0],
-                     
&This->UntranslatedResourceList->List[0].PartialResourceList.PartialDescriptors[0],

-                      sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) *
This->UntranslatedResourceList->List[0].PartialResourceList.Count);
-    }
-
-   
RtlCopyMemory(&NewUntranslatedResources->List[0].PartialResourceList.PartialDescriptors[This->UntranslatedResourceList[0].List->PartialResourceList.Count],
Untranslated, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
-
+    /* now copy translated resource list */
+    RtlMoveMemory(NewTranslatedResources, This->TranslatedResourceList,
TranslatedSize);
+    RtlMoveMemory((PUCHAR)NewTranslatedResources + TranslatedSize, Translated,
sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
+
+    /* now copy untranslated resource list */
+    RtlMoveMemory(NewUntranslatedResources, This->UntranslatedResourceList,
UntranslatedSize);
+    RtlMoveMemory((PUCHAR)NewUntranslatedResources + UntranslatedSize, Untranslated,
sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
+
+    /* free old lists */
     FreeItem(This->TranslatedResourceList, TAG_PORTCLASS);
     FreeItem(This->UntranslatedResourceList, TAG_PORTCLASS);
 
+    /* store new lists */
     This->UntranslatedResourceList = NewUntranslatedResources;
     This->TranslatedResourceList = NewTranslatedResources;
 
+    /* increment descriptor count */
     NewUntranslatedResources->List[0].PartialResourceList.Count++;
     NewTranslatedResources->List[0].PartialResourceList.Count++;
+
+    /* add entry count */
+    This->NumberOfEntries++;
 
     return STATUS_SUCCESS;
 }
@@ -258,37 +283,21 @@
     IN  CM_RESOURCE_TYPE Type,
     IN  ULONG Index)
 {
-    PCM_PARTIAL_RESOURCE_DESCRIPTOR Translated;
-    PCM_RESOURCE_LIST NewTranslatedResources;
-    ULONG NewTranslatedSize;
-    IResourceListImpl * This = (IResourceListImpl*)iface;
+    PCM_PARTIAL_RESOURCE_DESCRIPTOR Translated, Untranslated;
 
     ASSERT_IRQL_EQUAL(PASSIVE_LEVEL);
 
     Translated = Parent->lpVtbl->FindTranslatedEntry(Parent, Type, Index);
-    if (!Translated)
-        return STATUS_INVALID_PARAMETER;
-
-    NewTranslatedSize = sizeof(CM_RESOURCE_LIST) +
This->TranslatedResourceList[0].List->PartialResourceList.Count *
sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR);
-    NewTranslatedResources = AllocateItem(This->PoolType, NewTranslatedSize,
TAG_PORTCLASS);
-    if (!NewTranslatedResources)
-        return STATUS_INSUFFICIENT_RESOURCES;
-
-    RtlCopyMemory(NewTranslatedResources, This->TranslatedResourceList,
sizeof(CM_RESOURCE_LIST));
-    if (This->TranslatedResourceList[0].List->PartialResourceList.Count > 1)
-    {
-       
RtlCopyMemory(&NewTranslatedResources->List[0].PartialResourceList.PartialDescriptors[0],
-                     
&This->TranslatedResourceList->List[0].PartialResourceList.PartialDescriptors[0],

-                      sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR) *
This->TranslatedResourceList->List[0].PartialResourceList.Count);
-    }
-
-   
RtlCopyMemory(&NewTranslatedResources->List[0].PartialResourceList.PartialDescriptors[This->TranslatedResourceList[0].List->PartialResourceList.Count],
Translated, sizeof(CM_PARTIAL_RESOURCE_DESCRIPTOR));
-
-    FreeItem(This->TranslatedResourceList, TAG_PORTCLASS);
-    This->TranslatedResourceList = NewTranslatedResources;
-    NewTranslatedResources->List[0].PartialResourceList.Count++;
-
-    return STATUS_SUCCESS;
+    Untranslated = Parent->lpVtbl->FindUntranslatedEntry(Parent, Type, Index);
+
+    if (Translated && Untranslated)
+    {
+        /* add entry from parent */
+        return iface->lpVtbl->AddEntry(iface, Translated, Untranslated);
+    }
+
+    /* entry not found */
+    return STATUS_INVALID_PARAMETER;
 }
 
 PCM_RESOURCE_LIST
@@ -399,6 +408,9 @@
     ResourceCount = TranslatedResourceList->List[0].PartialResourceList.Count;
     NewTranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount]);
 
+    /* store resource count */
+    NewList->NumberOfEntries = ResourceCount;
+
     /* calculate untranslated resouce list size */
     ResourceCount = UntranslatedResourceList->List[0].PartialResourceList.Count;
     NewUntranslatedSize = FIELD_OFFSET(CM_RESOURCE_LIST,
List[0].PartialResourceList.PartialDescriptors[ResourceCount]);