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diff --git a/ninja/src/depfile_parser.h b/ninja/src/depfile_parser.h
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+++ b/ninja/src/depfile_parser.h
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+// Copyright 2011 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.
+
+#ifndef NINJA_DEPFILE_PARSER_H_
+#define NINJA_DEPFILE_PARSER_H_
+
+#include <string>
+#include <vector>
+using namespace std;
+
+#include "string_piece.h"
+
+/// Parser for the dependency information emitted by gcc's -M flags.
+struct DepfileParser {
+  /// Parse an input file.  Input must be NUL-terminated.
+  /// Warning: may mutate the content in-place and parsed StringPieces are
+  /// pointers within it.
+  bool Parse(string* content, string* err);
+
+  StringPiece out_;
+  vector<StringPiece> ins_;
+};
+
+#endif // NINJA_DEPFILE_PARSER_H_