Added "GetCurrentDirectory()" to sys::Path.

git-svn-id: https://llvm.org/svn/llvm-project/llvm/trunk@45182 91177308-0d34-0410-b5e6-96231b3b80d8

include/llvm/System/Path.h

@@ -148,6 +148,11 @@ namespace sys {
       /// constructor must provide the same result as GetRootDirectory.
       /// @brief Construct a path to the current user's "home" directory
       static Path GetUserHomeDirectory();
+      
+      /// Construct a path to the current directory for the current process.
+      /// @returns The current working directory.
+      /// @brief Returns the current working directory.
+      static Path GetCurrentDirectory();
 
       /// Return the suffix commonly used on file names that contain a shared
       /// object, shared archive, or dynamic link library. Such files are

lib/System/Unix/Path.inc

@@ -250,6 +250,16 @@ Path::GetUserHomeDirectory() {
   return GetRootDirectory();
 }
 
+Path
+Path::GetCurrentDirectory() {
+  char pathname[MAXPATHLEN];
+  if (!getcwd(pathname,MAXPATHLEN)) {
+    assert (false && "Could not query current working directory.");
+    return Path("");
+  }
+  
+  return Path(pathname);
+}
 
 std::string
 Path::getBasename() const {

lib/System/Win32/Path.inc

@@ -222,6 +222,15 @@ Path::GetUserHomeDirectory() {
   }
   return GetRootDirectory();
 }
+
+Path
+Path::GetCurrentDirectory() {
+  char pathname[MAX_PATH];
+  GetCurrentDirectory(pathname,MAX_PATH);
+  return Path(pathname);  
+}
+
+
 // FIXME: the above set of functions don't map to Windows very well.