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Zadananie 3 - CRC #26

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s426271 wants to merge 8 commits from s426271/DALGLI0:zadanie-3 into master
pull from: s426271/DALGLI0:zadanie-3
merge into: kalmar:master
Conversation 4 Commits 8 Files Changed 15 +21 -15
2 changed files with 21 additions and 15 deletions
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Showing only changes of commit 744f9793c5 - Show all commits

16
Zadanie-03/src/com/tylkowski/crc/CrcTask.java
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@ -9,11 +9,24 @@ class CrcTask {
private String rawMessage;
CrcTask(String message, String rawMessage) {
this.message = formatMessage(message) + "0000000000000000";
this.message = formatMessage(toBinary(message)) + "0000000000000000";
this.rawMessage = rawMessage;
createGeneratingPolynomial();
}
private String toBinary(String s) {
byte[] bytes = s.getBytes();
StringBuilder binary = new StringBuilder();
for (byte b : bytes) {
int val = b;
for (int i = 0; i < 8; i++) {
binary.append((val & 128) == 0 ? 0 : 1);
val <<= 1;
}
}
return binary.toString();
}
private String formatMessage(String message) {
int firstNonZeroVal = 0;
boolean found = false;
@ -166,6 +179,7 @@ class CrcTask {
}
boolean decode(String encodedString) {
encodedString = toBinary(encodedString);
encodedString = fillPolyTo8(encodedString);
short[] encodedShortArray = convertBinaryStringToShortArray(encodedString);
encodedShortArray = swapPolynomialValues(encodedShortArray);

20
Zadanie-03/src/com/tylkowski/crc/Main.java
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@ -3,21 +3,13 @@ package com.tylkowski.crc;
public class Main {
public static void main(String[] args) {
CrcTask crcTask = new CrcTask(toBinary(args[0]), args[0]);
// ex. in command line type "a"
CrcTask crcTask = new CrcTask(args[0], args[0]);
System.out.println(crcTask.encode());
System.out.println(crcTask.decode(toBinary(crcTask.encode())));
String input = crcTask.encode();
if (input.length() >= 3) System.out.println(crcTask.decode(input));
}
private static String toBinary(String s) {
byte[] bytes = s.getBytes();
StringBuilder binary = new StringBuilder();
for (byte b : bytes) {
int val = b;
for (int i = 0; i < 8; i++) {
binary.append((val & 128) == 0 ? 0 : 1);
val <<= 1;
}
}
return binary.toString();
}
}