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Diffstat (limited to 'onlineupdate/source/update/updater/xpcom/glue/nsVersionComparator.h')
| -rw-r--r-- | onlineupdate/source/update/updater/xpcom/glue/nsVersionComparator.h | 174 |
1 files changed, 174 insertions, 0 deletions
diff --git a/onlineupdate/source/update/updater/xpcom/glue/nsVersionComparator.h b/onlineupdate/source/update/updater/xpcom/glue/nsVersionComparator.h new file mode 100644 index 000000000..d793e345e --- /dev/null +++ b/onlineupdate/source/update/updater/xpcom/glue/nsVersionComparator.h @@ -0,0 +1,174 @@ +/* -*- 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 <stdlib.h> +#include <string.h> +#include <assert.h> +#if defined(_WIN32) && !defined(UPDATER_NO_STRING_GLUE_STL) +#include <wchar.h> +#include <stdint.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 _WIN32 +int32_t CompareVersions(const wchar_t* aStrA, const wchar_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 _WIN32 +struct VersionW +{ + explicit VersionW(const wchar_t* aVersionStringW) + { + versionContentW = + reinterpret_cast<wchar_t*>(wcsdup(aVersionStringW)); + } + + const wchar_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: + wchar_t* versionContentW; +}; +#endif + +} // namespace mozilla + +#endif // nsVersionComparator_h__ + |