Merge branch 'upstream-KWSys' into update-kwsys

* upstream-KWSys:
  KWSys 2016-08-03 (6d23dd7e)

Source/kwsys/SystemTools.cxx

@@ -1291,6 +1291,32 @@ bool SystemTools::SameFile(const std::string& file1, const std::string& file2)
 #endif
 }
 
+//----------------------------------------------------------------------------
+bool SystemTools::PathExists(const std::string& path)
+{
+  if(path.empty())
+    {
+    return false;
+    }
+#if defined(__CYGWIN__)
+  // Convert path to native windows path if possible.
+  char winpath[MAX_PATH];
+  if(SystemTools::PathCygwinToWin32(path.c_str(), winpath))
+    {
+    return (GetFileAttributesA(winpath) != INVALID_FILE_ATTRIBUTES);
+    }
+  struct stat st;
+  return lstat(path.c_str(), &st) == 0;
+#elif defined(_WIN32)
+  return (GetFileAttributesW(
+            SystemTools::ConvertToWindowsExtendedPath(path).c_str())
+          != INVALID_FILE_ATTRIBUTES);
+#else
+  struct stat st;
+  return lstat(path.c_str(), &st) == 0;
+#endif
+}
+
 //----------------------------------------------------------------------------
 bool SystemTools::FileExists(const char* filename)
 {

Source/kwsys/SystemTools.hxx.in

@@ -305,6 +305,11 @@ public:
    */
   static std::string ConvertToWindowsOutputPath(const std::string&);
 
+  /**
+   * Return true if a path with the given name exists in the current directory.
+   */
+  static bool PathExists(const std::string& path);
+
   /**
    * Return true if a file exists in the current directory.
    * If isFile = true, then make sure the file is a file and

Source/kwsys/testSystemTools.cxx

@@ -204,6 +204,14 @@ static bool CheckFileOperations()
       << testNewDir << std::endl;
     res = false;
     }
+  // check existence
+  if (!kwsys::SystemTools::PathExists(testNewDir))
+    {
+    std::cerr
+      << "Problem with PathExists for: "
+      << testNewDir << std::endl;
+    res = false;
+    }
   // remove it
   if (!kwsys::SystemTools::RemoveADirectory(testNewDir))
     {
@@ -221,6 +229,15 @@ static bool CheckFileOperations()
       << testNewDir << std::endl;
     res = false;
     }
+  // check existence
+  if (kwsys::SystemTools::PathExists(testNewDir))
+    {
+    std::cerr
+      << "After RemoveADirectory: "
+      << "Problem with PathExists for: "
+      << testNewDir << std::endl;
+    res = false;
+    }
   // create it using the char* version
   if (!kwsys::SystemTools::MakeDirectory(testNewDir.c_str()))
     {
@@ -329,6 +346,31 @@ static bool CheckFileOperations()
     res = false;
     }
 
+  // calling with an empty string should return false
+  if (kwsys::SystemTools::PathExists(std::string()))
+    {
+    std::cerr
+      << "Problem with PathExists(std::string())"
+      << std::endl;
+    res = false;
+    }
+  // PathExists(x) should return true on a directory
+  if (!kwsys::SystemTools::PathExists(testNewDir))
+    {
+    std::cerr
+      << "Problem with PathExists for: "
+      << testNewDir << std::endl;
+    res = false;
+    }
+  // should work, was created as new file before
+  if (!kwsys::SystemTools::PathExists(testNewFile))
+    {
+    std::cerr
+      << "Problem with PathExists for: "
+      << testNewDir << std::endl;
+    res = false;
+    }
+
   // Reset umask
 #if defined(_WIN32) && !defined(__CYGWIN__)
   // NOTE:  Windows doesn't support toggling _S_IREAD.