1 files changed, 77 insertions, 0 deletions
diff --git a/security/sandbox/chromium/base/version.h b/security/sandbox/chromium/base/version.h
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+++ b/security/sandbox/chromium/base/version.h
@@ -0,0 +1,77 @@
+// Copyright (c) 2012 The Chromium Authors. All rights reserved.
+// Use of this source code is governed by a BSD-style license that can be
+// found in the LICENSE file.
+
+#ifndef BASE_VERSION_H_
+#define BASE_VERSION_H_
+
+#include <stdint.h>
+
+#include <iosfwd>
+#include <string>
+#include <vector>
+
+#include "base/base_export.h"
+#include "base/strings/string_piece.h"
+
+namespace base {
+
+// Version represents a dotted version number, like "1.2.3.4", supporting
+// parsing and comparison.
+class BASE_EXPORT Version {
+ public:
+  // The only thing you can legally do to a default constructed
+  // Version object is assign to it.
+  Version();
+
+  Version(const Version& other);
+
+  // Initializes from a decimal dotted version number, like "0.1.1".
+  // Each component is limited to a uint16_t. Call IsValid() to learn
+  // the outcome.
+  explicit Version(StringPiece version_str);
+
+  // Initializes from a vector of components, like {1, 2, 3, 4}. Call IsValid()
+  // to learn the outcome.
+  explicit Version(std::vector<uint32_t> components);
+
+  ~Version();
+
+  // Returns true if the object contains a valid version number.
+  bool IsValid() const;
+
+  // Returns true if the version wildcard string is valid. The version wildcard
+  // string may end with ".*" (e.g. 1.2.*, 1.*). Any other arrangement with "*"
+  // is invalid (e.g. 1.*.3 or 1.2.3*). This functions defaults to standard
+  // Version behavior (IsValid) if no wildcard is present.
+  static bool IsValidWildcardString(StringPiece wildcard_string);
+
+  // Returns -1, 0, 1 for <, ==, >.
+  int CompareTo(const Version& other) const;
+
+  // Given a valid version object, compare if a |wildcard_string| results in a
+  // newer version. This function will default to CompareTo if the string does
+  // not end in wildcard sequence ".*". IsValidWildcard(wildcard_string) must be
+  // true before using this function.
+  int CompareToWildcardString(StringPiece wildcard_string) const;
+
+  // Return the string representation of this version.
+  std::string GetString() const;
+
+  const std::vector<uint32_t>& components() const { return components_; }
+
+ private:
+  std::vector<uint32_t> components_;
+};
+
+BASE_EXPORT bool operator==(const Version& v1, const Version& v2);
+BASE_EXPORT bool operator!=(const Version& v1, const Version& v2);
+BASE_EXPORT bool operator<(const Version& v1, const Version& v2);
+BASE_EXPORT bool operator<=(const Version& v1, const Version& v2);
+BASE_EXPORT bool operator>(const Version& v1, const Version& v2);
+BASE_EXPORT bool operator>=(const Version& v1, const Version& v2);
+BASE_EXPORT std::ostream& operator<<(std::ostream& stream, const Version& v);
+
+}  // namespace base
+
+#endif  // BASE_VERSION_H_