Add sys::Path::makeAbsolute().

llvm-svn: 68663

llvm/include/llvm/System/Path.h

@@ -459,6 +459,10 @@ namespace sys {
       /// @brief Make the current path name unique in the file system.
       bool makeUnique( bool reuse_current /*= true*/, std::string* ErrMsg );
 
+      /// The current Path name is made absolute by prepending the
+      /// current working directory if necessary.
+      void makeAbsolute();
+
     /// @}
     /// @name Disk Mutators
     /// @{

llvm/lib/System/Path.cpp

@@ -207,6 +207,18 @@ bool Path::hasMagicNumber(const std::string &Magic) const {
   return false;
 }
 
+void Path::makeAbsolute() {
+  if (isAbsolute())
+    return;
+
+  Path CWD = Path::GetCurrentDirectory();
+  assert(CWD.isAbsolute() && "GetCurrentDirectory returned relative path!");
+
+  CWD.appendComponent(path);
+
+  path = CWD.toString();
+}
+
 static void getPathList(const char*path, std::vector<Path>& Paths) {
   const char* at = path;
   const char* delim = strchr(at, PathSeparator);