/* -*- Mode: C++; tab-width: 8; indent-tabs-mode: nil; c-basic-offset: 2 -*- */ /* vim: set ts=8 sts=2 et sw=2 tw=80: */ /* This Source Code Form is subject to the terms of the Mozilla Public * License, v. 2.0. If a copy of the MPL was not distributed with this * file, You can obtain one at http://mozilla.org/MPL/2.0/. */ #ifndef nsVersionComparator_h__ #define nsVersionComparator_h__ #include "nscore.h" #include <stdlib.h> #include <string.h> #include <assert.h> #if defined(XP_WIN) && !defined(UPDATER_NO_STRING_GLUE_STL) #include <wchar.h> #include "nsStringGlue.h" #endif /** * In order to compare version numbers in Mozilla, you need to use the * mozilla::Version class. You can construct an object of this type by passing * in a string version number to the constructor. Objects of this type can be * compared using the standard comparison operators. * * For example, let's say that you want to make sure that a given version * number is not older than 15.a2. Here's how you would write a function to * do that. * * bool IsVersionValid(const char* version) { * return mozilla::Version("15.a2") <= mozilla::Version(version); * } * * Or, since Version's constructor is implicit, you can simplify this code: * * bool IsVersionValid(const char* version) { * return mozilla::Version("15.a2") <= version; * } * * On Windows, if your version strings are wide characters, you should use the * mozilla::VersionW variant instead. The semantics of that class is the same * as Version. */ namespace mozilla { int32_t CompareVersions(const char* aStrA, const char* aStrB); #ifdef XP_WIN int32_t CompareVersions(const char16_t* aStrA, const char16_t* aStrB); #endif struct Version { explicit Version(const char* aVersionString) { versionContent = strdup(aVersionString); } const char* ReadContent() const { return versionContent; } ~Version() { free(versionContent); } bool operator<(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) == -1; } bool operator<=(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) < 1; } bool operator>(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) == 1; } bool operator>=(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) > -1; } bool operator==(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) == 0; } bool operator!=(const Version& aRhs) const { return CompareVersions(versionContent, aRhs.ReadContent()) != 0; } bool operator<(const char* aRhs) const { return CompareVersions(versionContent, aRhs) == -1; } bool operator<=(const char* aRhs) const { return CompareVersions(versionContent, aRhs) < 1; } bool operator>(const char* aRhs) const { return CompareVersions(versionContent, aRhs) == 1; } bool operator>=(const char* aRhs) const { return CompareVersions(versionContent, aRhs) > -1; } bool operator==(const char* aRhs) const { return CompareVersions(versionContent, aRhs) == 0; } bool operator!=(const char* aRhs) const { return CompareVersions(versionContent, aRhs) != 0; } private: char* versionContent; }; #ifdef XP_WIN struct VersionW { VersionW(const char16_t* aVersionStringW) { versionContentW = reinterpret_cast<char16_t*>(wcsdup(char16ptr_t(aVersionStringW))); } const char16_t* ReadContentW() const { return versionContentW; } ~VersionW() { free(versionContentW); } bool operator<(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) == -1; } bool operator<=(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) < 1; } bool operator>(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) == 1; } bool operator>=(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) > -1; } bool operator==(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) == 0; } bool operator!=(const VersionW& aRhs) const { return CompareVersions(versionContentW, aRhs.ReadContentW()) != 0; } private: char16_t* versionContentW; }; #endif } // namespace mozilla #endif // nsVersionComparator_h__