From 722d5adac1c3af88e785088eda594c7f656e9ed8 Mon Sep 17 00:00:00 2001
From: "Michael J. Spencer" <bigcheesegs@gmail.com>
Date: Wed, 1 Dec 2010 02:48:27 +0000
Subject: [PATCH] Support/PathV2: Add native implementation.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@120539 91177308-0d34-0410-b5e6-96231b3b80d8
---
 lib/Support/PathV2.cpp     | 22 ++++++++++++++++++++++
 unittests/Support/Path.cpp |  3 +++
 2 files changed, 25 insertions(+)

diff --git a/lib/Support/PathV2.cpp b/lib/Support/PathV2.cpp
index 7e49d8d446a..7bb79887a3f 100644
--- a/lib/Support/PathV2.cpp
+++ b/lib/Support/PathV2.cpp
@@ -531,6 +531,28 @@ error_code replace_extension(SmallVectorImpl<char> &path,
   return make_error_code(errc::success);
 }
 
+error_code native(const Twine &path, SmallVectorImpl<char> &result) {
+  // Clear result.
+  result.set_size(0);
+#ifdef LLVM_ON_WIN32
+  SmallString<128> path_storage;
+  StringRef p = path.toStringRef(path_storage);
+  result.reserve(p.size());
+  for (StringRef::const_iterator i = p.begin(),
+                                 e = p.end();
+                                 i != e;
+                                 ++i) {
+    if (*i == '/')
+      result.push_back('\\');
+    else
+      result.push_back(*i);
+  }
+#else
+  path.toVector(result);
+#endif
+  return make_error_code(errc::success);
+}
+
 }
 }
 }
diff --git a/unittests/Support/Path.cpp b/unittests/Support/Path.cpp
index 823b0780300..8570047af84 100644
--- a/unittests/Support/Path.cpp
+++ b/unittests/Support/Path.cpp
@@ -107,6 +107,9 @@ TEST(Support, Path) {
     if (error_code ec = sys::path::replace_extension(temp_store, "ext"))
       ASSERT_FALSE(ec.message().c_str());
     outs() << "    replace_extension: " << temp_store << '\n';
+    if (error_code ec = sys::path::native(*i, temp_store))
+      ASSERT_FALSE(ec.message().c_str());
+    outs() << "    native: " << temp_store << '\n';
 
     outs().flush();
   }