1 // Copyright (c) 2012 The Chromium Authors. All rights reserved. 2 // Use of this source code is governed by a BSD-style license that can be 3 // found in the LICENSE file. 4 5 #ifndef BASE_VERSION_H_ 6 #define BASE_VERSION_H_ 7 8 #include <string> 9 #include <vector> 10 11 #include "base/base_export.h" 12 #include "base/basictypes.h" 13 14 namespace base { 15 16 // Version represents a dotted version number, like "1.2.3.4", supporting 17 // parsing and comparison. 18 class BASE_EXPORT Version { 19 public: 20 // The only thing you can legally do to a default constructed 21 // Version object is assign to it. 22 Version(); 23 24 ~Version(); 25 26 // Initializes from a decimal dotted version number, like "0.1.1". 27 // Each component is limited to a uint16. Call IsValid() to learn 28 // the outcome. 29 explicit Version(const std::string& version_str); 30 31 // Returns true if the object contains a valid version number. 32 bool IsValid() const; 33 34 // Returns true if the version wildcard string is valid. The version wildcard 35 // string may end with ".*" (e.g. 1.2.*, 1.*). Any other arrangement with "*" 36 // is invalid (e.g. 1.*.3 or 1.2.3*). This functions defaults to standard 37 // Version behavior (IsValid) if no wildcard is present. 38 static bool IsValidWildcardString(const std::string& wildcard_string); 39 40 // Commonly used pattern. Given a valid version object, compare if a 41 // |version_str| results in a newer version. Returns true if the 42 // string represents valid version and if the version is greater than 43 // than the version of this object. 44 bool IsOlderThan(const std::string& version_str) const; 45 46 bool Equals(const Version& other) const; 47 48 // Returns -1, 0, 1 for <, ==, >. 49 int CompareTo(const Version& other) const; 50 51 // Given a valid version object, compare if a |wildcard_string| results in a 52 // newer version. This function will default to CompareTo if the string does 53 // not end in wildcard sequence ".*". IsValidWildcard(wildcard_string) must be 54 // true before using this function. 55 int CompareToWildcardString(const std::string& wildcard_string) const; 56 57 // Return the string representation of this version. 58 const std::string GetString() const; 59 components()60 const std::vector<uint16>& components() const { return components_; } 61 62 private: 63 std::vector<uint16> components_; 64 }; 65 66 } // namespace base 67 68 // TODO(xhwang) remove this when all users are updated to explicitly use the 69 // namespace 70 using base::Version; 71 72 #endif // BASE_VERSION_H_ 73