add functions for normalizing win32 include paths

(Note from Evan: this is landing Scott's code more or less verbatim
without a lot of analysis; it could maybe be simplified and reduced,
but it's only intended to be used in the MSVC helper so it's fine
to be experimental.)

1 files changed, 35 insertions, 0 deletions

diff --git a/src/includes_normalize.h b/src/includes_normalize.h
new file mode 100644
index 0000000..458613a
--- /dev/null
+++ b/src/includes_normalize.h
@@ -0,0 +1,35 @@
+// Copyright 2012 Google Inc. All Rights Reserved.
+//
+// Licensed under the Apache License, Version 2.0 (the "License");
+// you may not use this file except in compliance with the License.
+// You may obtain a copy of the License at
+//
+//     http://www.apache.org/licenses/LICENSE-2.0
+//
+// Unless required by applicable law or agreed to in writing, software
+// distributed under the License is distributed on an "AS IS" BASIS,
+// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+// See the License for the specific language governing permissions and
+// limitations under the License.
+
+#include <string>
+#include <vector>
+using namespace std;
+
+struct StringPiece;
+
+/// Utility functions for normalizing include paths on Windows.
+/// TODO: this likely duplicates functionality of CanonicalizePath; refactor.
+struct IncludesNormalize {
+  // Internal utilities made available for testing, maybe useful otherwise.
+  static string Join(const vector<string>& list, char sep);
+  static vector<string> Split(const string& input, char sep);
+  static string ToLower(const string& s);
+  static string AbsPath(StringPiece s);
+  static string Relativize(StringPiece path, const string& start);
+
+  /// Normalize by fixing slashes style, fixing redundant .. and . and makes the
+  /// path relative to |relative_to|. Case is normalized to lowercase on
+  /// Windows too.
+  static string Normalize(StringPiece input, const char* relative_to);
+};