| /* |
| * Copyright (C) 2014 The Android Open Source Project |
| * |
| * Licensed under the Apache License, Version 2.0 (the "License"); |
| * you may not use this file except in compliance with the License. |
| * You may obtain a copy of the License at |
| * |
| * http://www.apache.org/licenses/LICENSE-2.0 |
| * |
| * Unless required by applicable law or agreed to in writing, software |
| * distributed under the License is distributed on an "AS IS" BASIS, |
| * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. |
| * See the License for the specific language governing permissions and |
| * limitations under the License. |
| */ |
| package com.android.alsascan; |
| |
| /** |
| * @hide |
| * Breaks lines in an ALSA "cards" or "devices" file into tokens. |
| * TODO(pmclean) Look into replacing this with String.split(). |
| */ |
| public class LineTokenizer { |
| public static final int kTokenNotFound = -1; |
| |
| private String mDelimiters = ""; |
| |
| public LineTokenizer(String delimiters) { |
| mDelimiters = delimiters; |
| } |
| |
| int nextToken(String line, int startIndex) { |
| int len = line.length(); |
| int offset = startIndex; |
| for (; offset < len; offset++) { |
| if (mDelimiters.indexOf(line.charAt(offset)) == -1) { |
| // past a delimiter |
| break; |
| } |
| } |
| |
| return offset < len ? offset : kTokenNotFound; |
| } |
| |
| int nextDelimiter(String line, int startIndex) { |
| int len = line.length(); |
| int offset = startIndex; |
| for (; offset < len; offset++) { |
| if (mDelimiters.indexOf(line.charAt(offset)) != -1) { |
| // past a delimiter |
| break; |
| } |
| } |
| |
| return offset < len ? offset : kTokenNotFound; |
| } |
| } |