Support: Add PathV2 implementation.

llvm-svn: 120329

1 files changed, 39 insertions, 0 deletions

diff --git a/llvm/lib/Support/Unix/PathV2.inc b/llvm/lib/Support/Unix/PathV2.inc
new file mode 100644
index 00000000000..bcd93f046dd
--- /dev/null
+++ b/llvm/lib/Support/Unix/PathV2.inc
@@ -0,0 +1,39 @@
+//===- llvm/Support/Unix/PathV2.cpp - Unix Path Implementation --*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+//
+// This file implements the Unix specific implementation of the PathV2 API.
+//
+//===----------------------------------------------------------------------===//
+
+//===----------------------------------------------------------------------===//
+//=== WARNING: Implementation here must contain only generic UNIX code that
+//===          is guaranteed to work on *all* UNIX variants.
+//===----------------------------------------------------------------------===//
+
+#include "Unix.h"
+
+namespace llvm {
+namespace sys  {
+namespace path {
+
+error_code current_path(SmallVectorImpl<char> &result) {
+  long size = ::pathconf(".", _PC_PATH_MAX);
+  result.reserve(size + 1);
+  result.set_size(size + 1);
+
+  if (::getcwd(result.data(), result.size()) == 0)
+    return error_code(errno, system_category());
+
+  result.set_size(strlen(result.data()));
+  return make_error_code(errc::success);
+}
+
+} // end namespace path
+} // end namespace sys
+} // end namespace llvm