1 /* 2 * Copyright (C) 2014 The Android Open Source Project 3 * 4 * Licensed under the Apache License, Version 2.0 (the "License"); 5 * you may not use this file except in compliance with the License. 6 * You may obtain a copy of the License at 7 * 8 * http://www.apache.org/licenses/LICENSE-2.0 9 * 10 * Unless required by applicable law or agreed to in writing, software 11 * distributed under the License is distributed on an "AS IS" BASIS, 12 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. 13 * See the License for the specific language governing permissions and 14 * limitations under the License. 15 */ 16 package com.android.internal.alsa; 17 18 /** 19 * @hide 20 * Breaks lines in an ALSA "cards" or "devices" file into tokens. 21 * TODO(pmclean) Look into replacing this with String.split(). 22 */ 23 public class LineTokenizer { 24 public static final int kTokenNotFound = -1; 25 26 private final String mDelimiters; 27 28 public LineTokenizer(String delimiters) { 29 mDelimiters = delimiters; 30 } 31 32 int nextToken(String line, int startIndex) { 33 int len = line.length(); 34 int offset = startIndex; 35 for (; offset < len; offset++) { 36 if (mDelimiters.indexOf(line.charAt(offset)) == -1) { 37 // past a delimiter 38 break; 39 } 40 } 41 42 return offset < len ? offset : kTokenNotFound; 43 } 44 45 int nextDelimiter(String line, int startIndex) { 46 int len = line.length(); 47 int offset = startIndex; 48 for (; offset < len; offset++) { 49 if (mDelimiters.indexOf(line.charAt(offset)) != -1) { 50 // past a delimiter 51 break; 52 } 53 } 54 55 return offset < len ? offset : kTokenNotFound; 56 } 57 } 58
