/*
* 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.
*/
package com.google.zxing.client.android.wifi;
import java.util.regex.Pattern;
import android.text.TextUtils;
/**
* Try with:
* http://chart.apis.google.com/chart?cht=qr&chs=240x240&chl=WIFI:S:linksys;P:mypass;T:WPA;;
*
* TODO(vikrama): Test with binary ssid or password.
*
* @author Vikram Aggarwal
*/
final class NetworkUtil {
private static final Pattern HEX_DIGITS = Pattern.compile("[0-9A-Fa-f]+");
private NetworkUtil() {
}
/**
* Encloses the incoming string inside double quotes, if it isn't already quoted.
* @param string: the input string
* @return a quoted string, of the form "input". If the input string is null, it returns null
* as well.
*/
static String convertToQuotedString(String string) {
if (string == null){
return null;
}
if (TextUtils.isEmpty(string)) {
return "";
}
int lastPos = string.length() - 1;
if (lastPos < 0 || (string.charAt(0) == '"' && string.charAt(lastPos) == '"')) {
return string;
}
return '\"' + string + '\"';
}
/**
* Check if wepKey is a valid hexadecimal string.
* @param wepKey the input to be checked
* @return true if the input string is indeed hex or empty. False if the input string is non-hex
* or null.
*/
static boolean isHexWepKey(CharSequence wepKey) {
if (wepKey == null) {
return false;
}
int length = wepKey.length();
// WEP-40, WEP-104, and some vendors using 256-bit WEP (WEP-232?)
return (length == 10 || length == 26 || length == 58) && HEX_DIGITS.matcher(wepKey).matches();
}
}