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author | Florian Dold <florian@dold.me> | 2021-03-17 17:56:37 +0100 |
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committer | Florian Dold <florian@dold.me> | 2021-03-17 17:56:37 +0100 |
commit | 07cdfb2e4ec761021477271776b81f33af0e731d (patch) | |
tree | cb62b1d1a04e1e64b8ee47e78196e858727d2c0a /packages/taler-util/src/libtool-version.ts | |
parent | 42a4d666f42ce94274995bfdae644444ff5f6d53 (diff) | |
download | wallet-core-07cdfb2e4ec761021477271776b81f33af0e731d.tar.xz |
towards wallet-core / util split
Diffstat (limited to 'packages/taler-util/src/libtool-version.ts')
-rw-r--r-- | packages/taler-util/src/libtool-version.ts | 88 |
1 files changed, 88 insertions, 0 deletions
diff --git a/packages/taler-util/src/libtool-version.ts b/packages/taler-util/src/libtool-version.ts new file mode 100644 index 000000000..5e9d0b74e --- /dev/null +++ b/packages/taler-util/src/libtool-version.ts @@ -0,0 +1,88 @@ +/* + This file is part of TALER + (C) 2017 GNUnet e.V. + + TALER is free software; you can redistribute it and/or modify it under the + terms of the GNU General Public License as published by the Free Software + Foundation; either version 3, or (at your option) any later version. + + TALER is distributed in the hope that it will be useful, but WITHOUT ANY + WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR + A PARTICULAR PURPOSE. See the GNU General Public License for more details. + + You should have received a copy of the GNU General Public License along with + TALER; see the file COPYING. If not, see <http://www.gnu.org/licenses/> + */ + +/** + * Semantic versioning, but libtool-style. + * See https://www.gnu.org/software/libtool/manual/html_node/Libtool-versioning.html + */ + +/** + * Result of comparing two libtool versions. + */ +export interface VersionMatchResult { + /** + * Is the first version compatible with the second? + */ + compatible: boolean; + /** + * Is the first version older (-1), newser (+1) or + * identical (0)? + */ + currentCmp: number; +} + +interface Version { + current: number; + revision: number; + age: number; +} + +/** + * Compare two libtool-style version strings. + */ +export function compare( + me: string, + other: string, +): VersionMatchResult | undefined { + const meVer = parseVersion(me); + const otherVer = parseVersion(other); + + if (!(meVer && otherVer)) { + return undefined; + } + + const compatible = + meVer.current - meVer.age <= otherVer.current && + meVer.current >= otherVer.current - otherVer.age; + + const currentCmp = Math.sign(meVer.current - otherVer.current); + + return { compatible, currentCmp }; +} + +function parseVersion(v: string): Version | undefined { + const [currentStr, revisionStr, ageStr, ...rest] = v.split(":"); + if (rest.length !== 0) { + return undefined; + } + const current = Number.parseInt(currentStr); + const revision = Number.parseInt(revisionStr); + const age = Number.parseInt(ageStr); + + if (Number.isNaN(current)) { + return undefined; + } + + if (Number.isNaN(revision)) { + return undefined; + } + + if (Number.isNaN(age)) { + return undefined; + } + + return { current, revision, age }; +} |