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+// Copyright 2008, Google Inc.
+// All rights reserved.
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+//    * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+//    * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+//    * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+//
+// This file defines utility functions for escaping strings.
+
+#ifndef BASE_STRING_ESCAPE_H__
+#define BASE_STRING_ESCAPE_H__
+
+#include <string>
+
+namespace string_escape {
+
+// Escape |str| appropriately for a javascript string litereal, _appending_ the
+// result to |dst|. This will create standard escape sequences (\b, \n),
+// hex escape sequences (\x00), and unicode escape sequences (\uXXXX).
+// If |put_in_quotes| is true, the result will be surrounded in double quotes.
+// The outputted literal, when interpreted by the browser, should result in a
+// javascript string that is identical and the same length as the input |str|.
+void JavascriptDoubleQuote(const std::wstring& str,
+                           bool put_in_quotes,
+                           std::string* dst);
+
+// Similar to the wide version, but for narrow strings.  It will not use
+// \uXXXX unicode escape sequences.  It will pass non-7bit characters directly
+// into the string unencoded, allowing the browser to interpret the encoding.
+// The outputted literal, when interpreted by the browser, could result in a
+// javascript string of a different length than the input |str|.
+void JavascriptDoubleQuote(const std::string& str,
+                           bool put_in_quotes,
+                           std::string* dst);
+
+}  // namespace string_escape
+
+#endif  // BASE_STRING_ESCAPE_H__