| // Copyright 2016 The Vanadium Authors. All rights reserved. |
| // Use of this source code is governed by a BSD-style |
| // license that can be found in the LICENSE file. |
| |
| import 'dart:io' show Platform; |
| import 'dart:math'; |
| |
| int minLength(List<String> elements) { |
| if (elements == null || elements.isEmpty) return -1; |
| return elements.map((String e) => e.length).reduce(min); |
| } |
| |
| bool isSystemSeparator(String letter) { |
| return letter == Platform.pathSeparator; |
| } |
| |
| int beginOfDiff(List<String> elements) { |
| if (elements.length == 1) |
| return elements[0].lastIndexOf(Platform.pathSeparator) + 1; |
| int minL = minLength(elements); |
| int lastSlash = 0; |
| for (int i = 0; i < minL; i++) { |
| String letter = elements[0][i]; |
| if (isSystemSeparator(letter)) { |
| lastSlash = i; |
| } |
| for (String element in elements) { |
| if (letter != element[i]) { |
| return lastSlash + 1; |
| } |
| } |
| } |
| return minL; |
| } |