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// 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 <string>
#include <vector>
#include "base/base_export.h"
#include "base/basictypes.h"
// 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();
// Initializes from a decimal dotted version number, like "0.1.1".
// Each component is limited to a uint16. Call IsValid() to learn
// the outcome.
explicit Version(const std::string& version_str);
// 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(const std::string& wildcard_string);
// Commonly used pattern. Given a valid version object, compare if a
// |version_str| results in a newer version. Returns true if the
// string represents valid version and if the version is greater than
// than the version of this object.
bool IsOlderThan(const std::string& version_str) const;
bool Equals(const Version& other) const;
// 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(const std::string& wildcard_string) const;
// Return the string representation of this version.
const std::string GetString() const;
const std::vector<uint16>& components() const { return components_; }
private:
std::vector<uint16> components_;
};
#endif // BASE_VERSION_H_
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