1 // Copyright 2012 The Chromium Authors 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 <stdint.h> 9 10 #include <iosfwd> 11 #include <string> 12 #include <string_view> 13 #include <vector> 14 15 #include "base/base_export.h" 16 17 namespace base { 18 19 // Version represents a dotted version number, like "1.2.3.4", supporting 20 // parsing and comparison. 21 class BASE_EXPORT Version { 22 public: 23 // The only thing you can legally do to a default constructed 24 // Version object is assign to it. 25 Version(); 26 27 Version(const Version& other); 28 Version(Version&& other); 29 30 Version& operator=(const Version& other) = default; 31 Version& operator=(Version&& other) = default; 32 33 // Initializes from a decimal dotted version number, like "0.1.1". 34 // Each component is limited to a uint32_t. Call IsValid() to learn 35 // the outcome. 36 explicit Version(std::string_view version_str); 37 38 // Initializes from a vector of components, like {1, 2, 3, 4}. Call IsValid() 39 // to learn the outcome. 40 explicit Version(std::vector<uint32_t> components); 41 42 ~Version(); 43 44 // Returns true if the object contains a valid version number. 45 bool IsValid() const; 46 47 // Returns true if the version wildcard string is valid. The version wildcard 48 // string may end with ".*" (e.g. 1.2.*, 1.*). Any other arrangement with "*" 49 // is invalid (e.g. 1.*.3 or 1.2.3*). This functions defaults to standard 50 // Version behavior (IsValid) if no wildcard is present. 51 static bool IsValidWildcardString(std::string_view wildcard_string); 52 53 // Returns -1, 0, 1 for <, ==, >. `this` and `other` must both be valid. 54 int CompareTo(const Version& other) const; 55 56 // Given a valid version object, compare if a |wildcard_string| results in a 57 // newer version. This function will default to CompareTo if the string does 58 // not end in wildcard sequence ".*". IsValidWildcard(wildcard_string) must be 59 // true before using this function. 60 int CompareToWildcardString(std::string_view wildcard_string) const; 61 62 // Return the string representation of this version. 63 std::string GetString() const; 64 components()65 const std::vector<uint32_t>& components() const { return components_; } 66 67 private: 68 std::vector<uint32_t> components_; 69 }; 70 71 BASE_EXPORT bool operator==(const Version& v1, const Version& v2); 72 BASE_EXPORT bool operator!=(const Version& v1, const Version& v2); 73 BASE_EXPORT bool operator<(const Version& v1, const Version& v2); 74 BASE_EXPORT bool operator<=(const Version& v1, const Version& v2); 75 BASE_EXPORT bool operator>(const Version& v1, const Version& v2); 76 BASE_EXPORT bool operator>=(const Version& v1, const Version& v2); 77 BASE_EXPORT std::ostream& operator<<(std::ostream& stream, const Version& v); 78 79 } // namespace base 80 81 #endif // BASE_VERSION_H_ 82