[hbelusca] 74119: [KERNEL32]: Check for NULL pointer specified to lstrlenA/W and return null length, as specified in the MSDN doc and checked by the tests of r74118. This should remove the unwanted...

Author: hbelusca
Date: Mon Mar  6 19:17:53 2017
New Revision: 74119
URL: http://svn.reactos.org/svn/reactos?rev=74119&view=rev
Log:
[KERNEL32]: Check for NULL pointer specified to lstrlenA/W and return null length, as
specified in the MSDN doc and checked by the tests of r74118.
This should remove the unwanted 1st-chance exceptions caught when debugging Office 2010
installation, that calls from time to time lstrlen with NULL pointers.
Modified:
    trunk/reactos/dll/win32/kernel32/winnls/string/lstring.c
Modified: trunk/reactos/dll/win32/kernel32/winnls/string/lstring.c
URL:
http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/winnls/…
==============================================================================
--- trunk/reactos/dll/win32/kernel32/winnls/string/lstring.c    [iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/winnls/string/lstring.c    [iso-8859-1] Mon Mar  6
19:17:53 2017
@@ -27,7 +27,8 @@
         return 1;
     Result = CompareStringA(GetThreadLocale(), 0, lpString1, -1, lpString2, -1);
-    if (Result) Result -= 2;
+    if (Result)
+        Result -= 2;
     return Result;
 }
@@ -55,6 +56,7 @@
     return Result;
 }
+
 /*
  * @implemented
@@ -144,6 +146,9 @@
 {
     INT Ret = 0;
+    if (lpString == NULL)
+        return 0;
+
     _SEH2_TRY
     {
         Ret = strlen(lpString);
@@ -292,6 +297,9 @@
 {
     INT Ret = 0;
+    if (lpString == NULL)
+        return 0;
+
     _SEH2_TRY
     {
         Ret = wcslen(lpString);