From 9bfe7d74c0ebaa4b1e538804040d77e194b4e45d Mon Sep 17 00:00:00 2001
From: orbitcowboy <orbitcowboy@web.de>
Date: Mon, 25 Mar 2019 09:07:02 +0100
Subject: [PATCH] windows.cfg: Fixed FP for invalidFunctionArg in second
 argument of _getcwd(). Reference:
 https://docs.microsoft.com/en-us/previous-versions/sf98bd4y(v%3Dvs.140)

---
 cfg/windows.cfg      |  3 ++-
 test/cfg/windows.cpp | 13 +++++++++++++
 2 files changed, 15 insertions(+), 1 deletion(-)

diff --git a/cfg/windows.cfg b/cfg/windows.cfg
index b4723bbef..2fbcd8691 100644
--- a/cfg/windows.cfg
+++ b/cfg/windows.cfg
@@ -1846,7 +1846,8 @@
     </arg>
     <arg nr="2" direction="in">
       <not-uninit/>
-      <valid>1:</valid>
+      <!-- Zero length is allowed in case the first argument is NULL. -->
+      <valid>0:</valid>
       <not-bool/>
     </arg>
   </function>
diff --git a/test/cfg/windows.cpp b/test/cfg/windows.cpp
index 1ddf667a0..c7044cd5a 100644
--- a/test/cfg/windows.cpp
+++ b/test/cfg/windows.cpp
@@ -8,6 +8,19 @@
 //
 
 #include <windows.h>
+#include <direct.h>
+#include <stdlib.h>
+
+void invalidFunctionArg__getcwd(char * buffer)
+{
+    // Passing NULL as the buffer forces getcwd to allocate
+    // memory for the path, which allows the code to support file paths
+    // longer than _MAX_PATH, which are supported by NTFS.
+    if ((buffer = _getcwd(NULL, 0)) == NULL) {
+        return;
+    }
+    free(buffer);
+}
 
 void validCode()
 {