/*
* Copyright (C) 2010 ZXing authors
*
* 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.
*/
/*
* These authors would like to acknowledge the Spanish Ministry of Industry,
* Tourism and Trade, for the support in the project TSI020301-2008-2
* "PIRAmIDE: Personalizable Interactions with Resources on AmI-enabled
* Mobile Dynamic Environments", led by Treelogic
* ( http://www.treelogic.com/ ):
*
* http://www.piramidepse.com/
*/
package ntu.com.google.zxing.oned.rss.expanded;
import ntu.com.google.zxing.common.BitArray;
/**
* @author Pablo Orduña, University of Deusto (pablo.orduna@deusto.es)
*/
public final class BinaryUtil {
private BinaryUtil() {
}
/*
* Constructs a BitArray from a String like the one returned from BitArray.toString()
*/
public static BitArray buildBitArrayFromString(String data){
String dotsAndXs = data.replaceAll("1", "X").replaceAll("0",".");
BitArray binary = new BitArray(dotsAndXs.replaceAll(" ", "").length());
int counter = 0;
for(int i = 0; i < dotsAndXs.length(); ++i){
if(i % 9 == 0){ // spaces
if(dotsAndXs.charAt(i) != ' ') {
throw new IllegalStateException("space expected");
}
continue;
}
char currentChar = dotsAndXs.charAt(i);
if(currentChar == 'X' || currentChar == 'x') {
binary.set(counter);
}
counter++;
}
return binary;
}
public static BitArray buildBitArrayFromStringWithoutSpaces(String data){
StringBuilder sb = new StringBuilder();
String dotsAndXs = data.replaceAll("1", "X").replaceAll("0",".");
int current = 0;
while(current < dotsAndXs.length()){
sb.append(' ');
for(int i = 0; i < 8 && current < dotsAndXs.length(); ++i){
sb.append(dotsAndXs.charAt(current));
current++;
}
}
return buildBitArrayFromString(sb.toString());
}
/*
public static int extractNumericValueFromBitArray(BitArray information, int pos, int bits) {
if(bits > 32) {
throw new IllegalArgumentException("extractNumberValueFromBitArray can't handle more than 32 bits");
}
BitArray numeric = new BitArray(bits);
for(int i = 0; i < bits; ++i) {
if (information.get(pos + i)) {
numeric.set(i);
}
}
numeric.reverse();
return numeric.bits[0];
}
*/
}