[hbelusca] 74708: [NTOS]: Minor fixes: - Correctly specify the buffer size for RtlInitEmptyUnicodeString calls; - Prefer using RtlAppendUnicodeStringToString instead of RtlAppendStringToString: bot...

Author: hbelusca
Date: Wed May 31 00:01:31 2017
New Revision: 74708

URL: http://svn.reactos.org/svn/reactos?rev=74708&view=rev
Log:
[NTOS]: Minor fixes:
- Correctly specify the buffer size for RtlInitEmptyUnicodeString calls;
- Prefer using RtlAppendUnicodeStringToString instead of RtlAppendStringToString: both actually do the very same job on counted strings, but the former doesn't need the explicit PSTRING casts, and NULL-terminate the string buffer if possible (aka. if the available remaining length permits it, otherwise it doesn't add any NULL terminator, falling back to the default behaviour of RtlAppendStringToString).
- Remove a deprecated commented-out variable.

Modified:
    trunk/reactos/ntoskrnl/config/cmsysini.c

Modified: trunk/reactos/ntoskrnl/config/cmsysini.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/ntoskrnl/config/cmsysini.c?...
==============================================================================
--- trunk/reactos/ntoskrnl/config/cmsysini.c	[iso-8859-1] (original)
+++ trunk/reactos/ntoskrnl/config/cmsysini.c	[iso-8859-1] Wed May 31 00:01:31 2017
@@ -1179,7 +1179,7 @@

NTSTATUS
 NTAPI
-CmpGetRegistryPath(IN PWCHAR ConfigPath)
+CmpGetRegistryPath(OUT PWCHAR ConfigPath)
 {
     OBJECT_ATTRIBUTES ObjectAttributes;
     NTSTATUS Status;
@@ -1257,7 +1257,6 @@
     UNICODE_STRING TempName, FileName, RegName;
     ULONG i, ErrorResponse, WorkerCount, Length;
     USHORT FileStart;
-    //ULONG RegStart;
     ULONG PrimaryDisposition, SecondaryDisposition, ClusterSize;
     PCMHIVE CmHive;
     HANDLE PrimaryHandle = NULL, LogHandle = NULL;
@@ -1273,36 +1272,35 @@
     CmpMachineHiveList[i].ThreadStarted = TRUE;

/* Build the file name and registry name strings */
-    RtlInitEmptyUnicodeString(&FileName, FileBuffer, MAX_PATH);
-    RtlInitEmptyUnicodeString(&RegName, RegBuffer, MAX_PATH);
+    RtlInitEmptyUnicodeString(&FileName, FileBuffer, sizeof(FileBuffer));
+    RtlInitEmptyUnicodeString(&RegName, RegBuffer, sizeof(RegBuffer));

/* Now build the system root path */
     CmpGetRegistryPath(ConfigPath);
     RtlInitUnicodeString(&TempName, ConfigPath);
-    RtlAppendStringToString((PSTRING)&FileName, (PSTRING)&TempName);
+    RtlAppendUnicodeStringToString(&FileName, &TempName);
     FileStart = FileName.Length;

/* And build the registry root path */
     RtlInitUnicodeString(&TempName, L"\REGISTRY\");
-    RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
-    //RegStart = RegName.Length;
+    RtlAppendUnicodeStringToString(&RegName, &TempName);

/* Build the base name */
     RtlInitUnicodeString(&TempName, CmpMachineHiveList[i].BaseName);
-    RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
+    RtlAppendUnicodeStringToString(&RegName, &TempName);

/* Check if this is a child of the root */
-    if (RegName.Buffer[RegName.Length / sizeof(WCHAR) - 1] == '\')
+    if (RegName.Buffer[RegName.Length / sizeof(WCHAR) - 1] == OBJ_NAME_PATH_SEPARATOR)
     {
         /* Then setup the whole name */
         RtlInitUnicodeString(&TempName, CmpMachineHiveList[i].Name);
-        RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
+        RtlAppendUnicodeStringToString(&RegName, &TempName);
     }

/* Now add the rest of the file name */
     RtlInitUnicodeString(&TempName, CmpMachineHiveList[i].Name);
     FileName.Length = FileStart;
-    RtlAppendStringToString((PSTRING)&FileName, (PSTRING)&TempName);
+    RtlAppendUnicodeStringToString(&FileName, &TempName);
     if (!CmpMachineHiveList[i].CmHive)
     {
         /* We need to allocate a new hive structure */
@@ -1426,17 +1424,17 @@
     CmpNoWrite = FALSE;

/* Build the file name and registry name strings */
-    RtlInitEmptyUnicodeString(&FileName, FileBuffer, MAX_PATH);
-    RtlInitEmptyUnicodeString(&RegName, RegBuffer, MAX_PATH);
+    RtlInitEmptyUnicodeString(&FileName, FileBuffer, sizeof(FileBuffer));
+    RtlInitEmptyUnicodeString(&RegName, RegBuffer, sizeof(RegBuffer));

/* Now build the system root path */
     CmpGetRegistryPath(ConfigPath);
     RtlInitUnicodeString(&TempName, ConfigPath);
-    RtlAppendStringToString((PSTRING)&FileName, (PSTRING)&TempName);
+    RtlAppendUnicodeStringToString(&FileName, &TempName);

/* And build the registry root path */
     RtlInitUnicodeString(&TempName, L"\REGISTRY\");
-    RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
+    RtlAppendUnicodeStringToString(&RegName, &TempName);
     RegStart = RegName.Length;

/* Setup the event to synchronize workers */
@@ -1504,14 +1502,14 @@
             /* Build the base name */
             RegName.Length = RegStart;
             RtlInitUnicodeString(&TempName, CmpMachineHiveList[i].BaseName);
-            RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
+            RtlAppendUnicodeStringToString(&RegName, &TempName);

/* Check if this is a child of the root */
-            if (RegName.Buffer[RegName.Length / sizeof(WCHAR) - 1] == '\')
+            if (RegName.Buffer[RegName.Length / sizeof(WCHAR) - 1] == OBJ_NAME_PATH_SEPARATOR)
             {
                 /* Then setup the whole name */
                 RtlInitUnicodeString(&TempName, CmpMachineHiveList[i].Name);
-                RtlAppendStringToString((PSTRING)&RegName, (PSTRING)&TempName);
+                RtlAppendUnicodeStringToString(&RegName, &TempName);
             }

/* Now link the hive to its master */