From cc144ebfd8b3a7b89e07c3b22b6a9e8540e5d0e2 Mon Sep 17 00:00:00 2001
From: KWSys Robot <kwrobot@kitware.com>
Date: Mon, 28 Sep 2015 09:29:33 -0400
Subject: KWSys 2015-09-28 (2089567a)

Extract upstream KWSys using the following shell commands.

$ git archive --prefix=upstream-kwsys/ 2089567a | tar x
$ git shortlog --no-merges --abbrev=8 --format='%h %s' dc4e4a55..2089567a
Vitaly Baranov (1):
      2089567a SystemTools: Fix GetPath to not affect existing output vector entries
---
 SystemTools.cxx     |  3 ++-
 testSystemTools.cxx | 63 +++++++++++++++++++++++++++++++++++++++++++++++++++++
 2 files changed, 65 insertions(+), 1 deletion(-)

diff --git a/SystemTools.cxx b/SystemTools.cxx
index 80289b8..262af27 100644
--- a/SystemTools.cxx
+++ b/SystemTools.cxx
@@ -408,6 +408,7 @@ class SystemToolsPathCaseMap:
 // adds the elements of the env variable path to the arg passed in
 void SystemTools::GetPath(std::vector<std::string>& path, const char* env)
 {
+  size_t const old_size = path.size();
 #if defined(_WIN32) && !defined(__CYGWIN__)
   const char pathSep = ';';
 #else
@@ -445,7 +446,7 @@ void SystemTools::GetPath(std::vector<std::string>& path, const char* env)
       done = true;
       }
     }
-  for(std::vector<std::string>::iterator i = path.begin();
+  for(std::vector<std::string>::iterator i = path.begin() + old_size;
       i != path.end(); ++i)
     {
     SystemTools::ConvertToUnixSlashes(*i);
diff --git a/testSystemTools.cxx b/testSystemTools.cxx
index e14d2fc..a0f904f 100644
--- a/testSystemTools.cxx
+++ b/testSystemTools.cxx
@@ -28,6 +28,7 @@
 #include <testSystemTools.h>
 
 #include <iostream>
+#include <sstream>
 #include <string.h> /* strcmp */
 #if defined(_WIN32) && !defined(__CYGWIN__)
 # include <io.h> /* _umask (MSVC) / umask (Borland) */
@@ -790,6 +791,66 @@ static bool CheckCollapsePath()
   return res;
 }
 
+static std::string StringVectorToString(const std::vector<std::string>& vec)
+{
+  std::stringstream ss;
+  ss << "vector(";
+  for (std::vector<std::string>::const_iterator i = vec.begin();
+       i != vec.end(); ++i)
+    {
+    if (i != vec.begin())
+      {
+      ss << ", ";
+      }
+    ss << *i;
+    }
+  ss << ")";
+  return ss.str();
+}
+
+static bool CheckGetPath()
+{
+  const char* envName = "S";
+#ifdef _WIN32
+  const char* envValue = "C:\\Somewhere\\something;D:\\Temp";
+#else
+  const char* envValue = "/Somewhere/something:/tmp";
+#endif
+  const char* registryPath = "[HKEY_LOCAL_MACHINE\\SOFTWARE\\MyApp; MyKey]";
+
+  std::vector<std::string> originalPathes;
+  originalPathes.push_back(registryPath);
+
+  std::vector<std::string> expectedPathes;
+  expectedPathes.push_back(registryPath);
+#ifdef _WIN32
+  expectedPathes.push_back("C:/Somewhere/something");
+  expectedPathes.push_back("D:/Temp");
+#else
+  expectedPathes.push_back("/Somewhere/something");
+  expectedPathes.push_back("/tmp");
+#endif
+
+  bool res = true;
+  res &= CheckPutEnv(std::string(envName) + "=" + envValue, envName, envValue);
+
+  std::vector<std::string> pathes = originalPathes;
+  kwsys::SystemTools::GetPath(pathes, envName);
+
+  if (pathes != expectedPathes)
+    {
+    std::cerr <<
+      "GetPath(" << StringVectorToString(originalPathes) <<
+      ", " << envName << ")  yielded " << StringVectorToString(pathes) <<
+      " instead of " << StringVectorToString(expectedPathes) <<
+      std::endl;
+    res = false;
+    }
+
+  res &= CheckUnPutEnv(envName, envName);
+  return res;
+}
+
 //----------------------------------------------------------------------------
 int testSystemTools(int, char*[])
 {
@@ -825,5 +886,7 @@ int testSystemTools(int, char*[])
 
   res &= CheckCollapsePath();
 
+  res &= CheckGetPath();
+
   return res ? 0 : 1;
 }
-- 
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