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src/main/java/tools/HexTool.java

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+/*
+	This file is part of the OdinMS Maple Story Server
+    Copyright (C) 2008 Patrick Huy <patrick.huy@frz.cc>
+		       Matthias Butz <matze@odinms.de>
+		       Jan Christian Meyer <vimes@odinms.de>
+
+    This program is free software: you can redistribute it and/or modify
+    it under the terms of the GNU Affero General Public License as
+    published by the Free Software Foundation version 3 as published by
+    the Free Software Foundation. You may not use, modify or distribute
+    this program under any other version of the GNU Affero General Public
+    License.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU Affero General Public License for more details.
+
+    You should have received a copy of the GNU Affero General Public License
+    along with this program.  If not, see <http://www.gnu.org/licenses/>.
+*/
+package tools;
+
+import constants.string.CharsetConstants;
+import java.io.ByteArrayOutputStream;
+
+public class HexTool {
+    private static final char[] HEX = {'0', '1', '2', '3', '4', '5', '6', '7', '8', '9', 'A', 'B', 'C', 'D', 'E', 'F'};
+
+    private static String toString(byte byteValue) {
+        int tmp = byteValue << 8;
+        char[] retstr = new char[]{HEX[(tmp >> 12) & 0x0F], HEX[(tmp >> 8) & 0x0F]};
+        return String.valueOf(retstr);
+    }
+
+    public static String toString(byte[] bytes) {
+        StringBuilder hexed = new StringBuilder();
+        for (int i = 0; i < bytes.length; i++) {
+            hexed.append(toString(bytes[i]));
+            hexed.append(' ');
+        }
+        return hexed.substring(0, hexed.length() - 1);
+    }
+    
+    public static String toCompressedString(byte[] bytes) {
+        StringBuilder hexed = new StringBuilder();
+        for (int i = 0; i < bytes.length; i++) {
+            hexed.append(toString(bytes[i]));
+        }
+        return hexed.substring(0, hexed.length());
+    }
+
+    public static byte[] getByteArrayFromHexString(String hex) {
+        ByteArrayOutputStream baos = new ByteArrayOutputStream();
+        int nexti = 0;
+        int nextb = 0;
+        boolean highoc = true;
+        outer:
+        for (;;) {
+            int number = -1;
+            while (number == -1) {
+                if (nexti == hex.length()) {
+                    break outer;
+                }
+                char chr = hex.charAt(nexti);
+                if (chr >= '0' && chr <= '9') {
+                    number = chr - '0';
+                } else if (chr >= 'a' && chr <= 'f') {
+                    number = chr - 'a' + 10;
+                } else if (chr >= 'A' && chr <= 'F') {
+                    number = chr - 'A' + 10;
+                } else {
+                    number = -1;
+                }
+                nexti++;
+            }
+            if (highoc) {
+                nextb = number << 4;
+                highoc = false;
+            } else {
+                nextb |= number;
+                highoc = true;
+                baos.write(nextb);
+            }
+        }
+        return baos.toByteArray();
+    }
+    
+    public static final String toStringFromAscii(final byte[] bytes) {
+        byte[] ret = new byte[bytes.length];
+        for (int x = 0; x < bytes.length; x++) {
+            if (bytes[x] < 32 && bytes[x] >= 0) {
+                ret[x] = '.';
+            } else {
+                int chr = ((short) bytes[x]) & 0xFF;
+                ret[x] = (byte) chr;
+            }
+        }
+        String encode = CharsetConstants.MAPLE_TYPE.getAscii();
+        try {
+            String str = new String(ret, encode);
+            return str;
+        } catch (Exception e) {}
+        return "";
+    }
+
+}