1 files changed, 66 insertions, 0 deletions
diff --git a/lldb/source/Utility/TildeExpressionResolver.cpp b/lldb/source/Utility/TildeExpressionResolver.cpp
new file mode 100644
index 00000000000..c33f0bf806f
--- /dev/null
+++ b/lldb/source/Utility/TildeExpressionResolver.cpp
@@ -0,0 +1,66 @@
+//===--------------------- TildeExpressionResolver.cpp ----------*- C++ -*-===//
+//
+//                     The LLVM Compiler Infrastructure
+//
+// This file is distributed under the University of Illinois Open Source
+// License. See LICENSE.TXT for details.
+//
+//===----------------------------------------------------------------------===//
+
+#include "lldb/Utility/TildeExpressionResolver.h"
+
+#include "llvm/ADT/SmallString.h"
+#include "llvm/Support/FileSystem.h"
+#include "llvm/Support/Path.h"
+
+using namespace lldb_private;
+using namespace llvm;
+
+namespace fs = llvm::sys::fs;
+namespace path = llvm::sys::path;
+
+TildeExpressionResolver::~TildeExpressionResolver() {}
+
+bool StandardTildeExpressionResolver::ResolveExact(
+    StringRef Expr, SmallVectorImpl<char> &Output) {
+  // We expect the tilde expression to be ONLY the expression itself, and
+  // contain
+  // no separators.
+  assert(!llvm::any_of(Expr, path::is_separator));
+  assert(Expr.empty() || Expr[0] == '~');
+
+  return !fs::real_path(Expr, Output, true);
+}
+
+bool StandardTildeExpressionResolver::ResolvePartial(StringRef Expr,
+                                                     StringSet<> &Output) {
+  // We expect the tilde expression to be ONLY the expression itself, and
+  // contain no separators.
+  assert(!llvm::any_of(Expr, path::is_separator));
+  assert(Expr.empty() || Expr[0] == '~');
+
+  Output.clear();
+#if defined(LLVM_ON_WIN32)
+  return false;
+#else
+  if (Expr.empty())
+    return false;
+
+  SmallString<32> Buffer = "~";
+  setpwent();
+  struct passwd *user_entry;
+  Expr = Expr.drop_front();
+
+  while ((user_entry = getpwent()) != NULL) {
+    StringRef ThisName(user_entry->pw_name);
+    if (!ThisName.startswith(Expr))
+      continue;
+
+    Buffer.resize(1);
+    Buffer.append(ThisName);
+    Buffer.append(path::get_separator()) Output.insert(Buffer);
+  }
+
+  return true;
+#endif
+}