| /* |
| * Copyright (C) 2006 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.internal.telephony; |
| |
| /** |
| * {@hide} |
| */ |
| public class ATResponseParser |
| { |
| /*************************** Instance Variables **************************/ |
| |
| private String mLine; |
| private int mNext = 0; |
| private int mTokStart, mTokEnd; |
| |
| /***************************** Class Methods *****************************/ |
| |
| public |
| ATResponseParser (String line) |
| { |
| mLine = line; |
| } |
| |
| public boolean |
| nextBoolean() |
| { |
| // "\s*(\d)(,|$)" |
| // \d is '0' or '1' |
| |
| nextTok(); |
| |
| if (mTokEnd - mTokStart > 1) { |
| throw new ATParseEx(); |
| } |
| char c = mLine.charAt(mTokStart); |
| |
| if (c == '0') return false; |
| if (c == '1') return true; |
| throw new ATParseEx(); |
| } |
| |
| |
| /** positive int only */ |
| public int |
| nextInt() |
| { |
| // "\s*(\d+)(,|$)" |
| int ret = 0; |
| |
| nextTok(); |
| |
| for (int i = mTokStart ; i < mTokEnd ; i++) { |
| char c = mLine.charAt(i); |
| |
| // Yes, ASCII decimal digits only |
| if (c < '0' || c > '9') { |
| throw new ATParseEx(); |
| } |
| |
| ret *= 10; |
| ret += c - '0'; |
| } |
| |
| return ret; |
| } |
| |
| public String |
| nextString() |
| { |
| nextTok(); |
| |
| return mLine.substring(mTokStart, mTokEnd); |
| } |
| |
| public boolean |
| hasMore() |
| { |
| return mNext < mLine.length(); |
| } |
| |
| private void |
| nextTok() |
| { |
| int len = mLine.length(); |
| |
| if (mNext == 0) { |
| skipPrefix(); |
| } |
| |
| if (mNext >= len) { |
| throw new ATParseEx(); |
| } |
| |
| try { |
| // \s*("([^"]*)"|(.*)\s*)(,|$) |
| |
| char c = mLine.charAt(mNext++); |
| boolean hasQuote = false; |
| |
| c = skipWhiteSpace(c); |
| |
| if (c == '"') { |
| if (mNext >= len) { |
| throw new ATParseEx(); |
| } |
| c = mLine.charAt(mNext++); |
| mTokStart = mNext - 1; |
| while (c != '"' && mNext < len) { |
| c = mLine.charAt(mNext++); |
| } |
| if (c != '"') { |
| throw new ATParseEx(); |
| } |
| mTokEnd = mNext - 1; |
| if (mNext < len && mLine.charAt(mNext++) != ',') { |
| throw new ATParseEx(); |
| } |
| } else { |
| mTokStart = mNext - 1; |
| mTokEnd = mTokStart; |
| while (c != ',') { |
| if (!Character.isWhitespace(c)) { |
| mTokEnd = mNext; |
| } |
| if (mNext == len) { |
| break; |
| } |
| c = mLine.charAt(mNext++); |
| } |
| } |
| } catch (StringIndexOutOfBoundsException ex) { |
| throw new ATParseEx(); |
| } |
| } |
| |
| |
| /** Throws ATParseEx if whitespace extends to the end of string */ |
| private char |
| skipWhiteSpace (char c) |
| { |
| int len; |
| len = mLine.length(); |
| while (mNext < len && Character.isWhitespace(c)) { |
| c = mLine.charAt(mNext++); |
| } |
| |
| if (Character.isWhitespace(c)) { |
| throw new ATParseEx(); |
| } |
| return c; |
| } |
| |
| |
| private void |
| skipPrefix() |
| { |
| // consume "^[^:]:" |
| |
| mNext = 0; |
| int s = mLine.length(); |
| while (mNext < s){ |
| char c = mLine.charAt(mNext++); |
| |
| if (c == ':') { |
| return; |
| } |
| } |
| |
| throw new ATParseEx("missing prefix"); |
| } |
| |
| } |