version.h (2684B)
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 <vector> 13 14 #include "base/base_export.h" 15 #include "base/strings/string_piece.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 29 // Initializes from a decimal dotted version number, like "0.1.1". 30 // Each component is limited to a uint32_t. Call IsValid() to learn 31 // the outcome. 32 explicit Version(StringPiece version_str); 33 34 // Initializes from a vector of components, like {1, 2, 3, 4}. Call IsValid() 35 // to learn the outcome. 36 explicit Version(std::vector<uint32_t> components); 37 38 ~Version(); 39 40 // Returns true if the object contains a valid version number. 41 bool IsValid() const; 42 43 // Returns true if the version wildcard string is valid. The version wildcard 44 // string may end with ".*" (e.g. 1.2.*, 1.*). Any other arrangement with "*" 45 // is invalid (e.g. 1.*.3 or 1.2.3*). This functions defaults to standard 46 // Version behavior (IsValid) if no wildcard is present. 47 static bool IsValidWildcardString(StringPiece wildcard_string); 48 49 // Returns -1, 0, 1 for <, ==, >. `this` and `other` must both be valid. 50 int CompareTo(const Version& other) const; 51 52 // Given a valid version object, compare if a |wildcard_string| results in a 53 // newer version. This function will default to CompareTo if the string does 54 // not end in wildcard sequence ".*". IsValidWildcard(wildcard_string) must be 55 // true before using this function. 56 int CompareToWildcardString(StringPiece wildcard_string) const; 57 58 // Return the string representation of this version. 59 std::string GetString() const; 60 61 const std::vector<uint32_t>& components() const { return components_; } 62 63 private: 64 std::vector<uint32_t> components_; 65 }; 66 67 BASE_EXPORT bool operator==(const Version& v1, const Version& v2); 68 BASE_EXPORT bool operator!=(const Version& v1, const Version& v2); 69 BASE_EXPORT bool operator<(const Version& v1, const Version& v2); 70 BASE_EXPORT bool operator<=(const Version& v1, const Version& v2); 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 std::ostream& operator<<(std::ostream& stream, const Version& v); 74 75 } // namespace base 76 77 #endif // BASE_VERSION_H_