[cwittich] 68797: [KERNEL32] sync GetTempPathW with wine wine-1.7.50

Author: cwittich
Date: Sun Aug 23 06:53:08 2015
New Revision: 68797

URL: http://svn.reactos.org/svn/reactos?rev=68797&view=rev
Log:
[KERNEL32] sync GetTempPathW with wine wine-1.7.50

Modified:
    trunk/reactos/dll/win32/kernel32/client/path.c

Modified: trunk/reactos/dll/win32/kernel32/client/path.c
URL: http://svn.reactos.org/svn/reactos/trunk/reactos/dll/win32/kernel32/client/p...
==============================================================================
--- trunk/reactos/dll/win32/kernel32/client/path.c	[iso-8859-1] (original)
+++ trunk/reactos/dll/win32/kernel32/client/path.c	[iso-8859-1] Sun Aug 23 06:53:08 2015
@@ -2116,13 +2116,18 @@

ret++; /* add space for terminating 0 */

-    if (count)
-    {
-        lstrcpynW(path, full_tmp_path, count);
-        if (count >= ret)
-            ret--; /* return length without 0 */
-        else if (count < 4)
-            path[0] = 0; /* avoid returning ambiguous "X:" */
+    if (count >= ret)
+    {
+        lstrcpynW(path, tmp_path, count);
+        /* the remaining buffer must be zeroed up to 32766 bytes in XP or 32767
+         * bytes after it, we will assume the > XP behavior for now */
+        memset(path + ret, 0, (min(count, 32767) - ret) * sizeof(WCHAR));
+        ret--; /* return length without 0 */
+    }
+    else if (count)
+    {
+        /* the buffer must be cleared if contents will not fit */
+        memset(path, 0, count * sizeof(WCHAR));
     }

DPRINT("GetTempPathW returning %u, %S\n", ret, path);