| [Arakhnę-Dev] [377] * Add a Base64 encoder/decoder (from the SFC). |
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Revision: 377
Author: galland
Date: 2012-08-20 10:43:19 +0200 (Mon, 20 Aug 2012)
Log Message:
-----------
* Add a Base64 encoder/decoder (from the SFC).
Added Paths:
-----------
trunk/arakhneText/src/main/java/org/arakhne/util/text/Base64Coder.java
trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder.properties
trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_es.properties
trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_fr.properties
Added: trunk/arakhneText/src/main/java/org/arakhne/util/text/Base64Coder.java
===================================================================
--- trunk/arakhneText/src/main/java/org/arakhne/util/text/Base64Coder.java (rev 0)
+++ trunk/arakhneText/src/main/java/org/arakhne/util/text/Base64Coder.java 2012-08-20 08:43:19 UTC (rev 377)
@@ -0,0 +1,168 @@
+/*
+ * $Id$
+ *
+ * Copyright (c) 2005-10, Multiagent Team,
+ * Laboratoire Systemes et Transports,
+ * Universite de Technologie de Belfort-Montbeliard.
+ * All rights reserved.
+ *
+ * Copyright (C) 2012 Stephane GALLAND.
+ *
+ * This library is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ *
+ * This library 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this library; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+ * This program is free software; you can redistribute it and/or modify
+ */
+package org.arakhne.util.text;
+
+import org.arakhne.vmutil.locale.Locale;
+
+/**
+ * A RFC 1521 compliant Base64 Encoder and Decoder.
+ *
+ * @author $Author: sgalland$
+ * @version $FullVersion$
+ * @mavengroupid $GroupId$
+ * @mavenartifactid $ArtifactId$
+ */
+public class Base64Coder {
+
+ // Mapping table from 6-bit nibbles to Base64 characters.
+ private static char[] map1 = new char[64];
+
+ static {
+ int i=0;
+ for (char c='A'; c<='Z'; ++c) map1[i++] = c;
+ for (char c='a'; c<='z'; ++c) map1[i++] = c;
+ for (char c='0'; c<='9'; ++c) map1[i++] = c;
+ map1[i++] = '+'; map1[i++] = '/';
+ }
+
+ // Mapping table from Base64 characters to 6-bit nibbles.
+ private static byte[] map2 = new byte[128];
+
+ static {
+ for (int i=0; i<map2.length; ++i) map2[i] = -1;
+ for (int i=0; i<64; ++i) map2[map1[i]] = (byte)i;
+ }
+
+ /**
+ * Encodes a string into Base64 format.
+ * No blanks or line breaks are inserted.
+ * @param s a String to be encoded.
+ * @return A String with the Base64 encoded data.
+ */
+ public static String encodeString(String s) {
+ return new String(encode(s.getBytes()));
+ }
+
+ /**
+ * Encodes a byte array into Base64 format.
+ * No blanks or line breaks are inserted.
+ *
+ * @param in is an array containing the data bytes to be encoded.
+ * @return a character array with the Base64 encoded data.
+ */
+ public static char[] encode(byte[] in) {
+ return encode(in,in.length);
+ }
+
+ /**
+ * Encodes a byte array into Base64 format.
+ * No blanks or line breaks are inserted.
+ * @param in an array containing the data bytes to be encoded.
+ * @param iLen number of bytes to process in <code>in</code>.
+ * @return A character array with the Base64 encoded data.
+ */
+ public static char[] encode(byte[] in, int iLen) {
+ int oDataLen = (iLen*4+2)/3; // output length without padding
+ int oLen = ((iLen+2)/3)*4; // output length including padding
+ char[] out = new char[oLen];
+ int ip = 0;
+ int op = 0;
+ while (ip < iLen) {
+ int i0 = in[ip++] & 0xff;
+ int i1 = ip < iLen ? in[ip++] & 0xff : 0;
+ int i2 = ip < iLen ? in[ip++] & 0xff : 0;
+ int o0 = i0 >>> 2;
+ int o1 = ((i0 & 3) << 4) | (i1 >>> 4);
+ int o2 = ((i1 & 0xf) << 2) | (i2 >>> 6);
+ int o3 = i2 & 0x3F;
+ out[op++] = map1[o0];
+ out[op++] = map1[o1];
+ out[op] = op < oDataLen ? map1[o2] : '='; ++op;
+ out[op] = op < oDataLen ? map1[o3] : '='; ++op;
+ }
+ return out;
+ }
+
+ /**
+ * Decodes a string from Base64 format.
+ * @param s a Base64 String to be decoded.
+ * @return A String containing the decoded data.
+ * @throws IllegalArgumentException if the input is not valid Base64 encoded data.
+ */
+ public static String decodeString(String s) {
+ return new String(decode(s));
+ }
+
+ /**
+ * Decodes a byte array from Base64 format.
+ * @param s a Base64 String to be decoded.
+ * @return An array containing the decoded data bytes.
+ * @throws IllegalArgumentException if the input is not valid Base64 encoded data.
+ */
+ public static byte[] decode(String s) {
+ return decode(s.toCharArray());
+ }
+
+ /**
+ * Decodes a byte array from Base64 format.
+ * No blanks or line breaks are allowed within the Base64 encoded data.
+ * @param in a character array containing the Base64 encoded data.
+ * @return An array containing the decoded data bytes.
+ * @throws IllegalArgumentException if the input is not valid Base64 encoded data.
+ */
+ public static byte[] decode(char[] in) {
+ int iLen = in.length;
+ if (iLen%4 != 0)
+ throw new IllegalArgumentException (Locale.getString("INVALID_STRING_LENGTH")); //$NON-NLS-1$
+ while (iLen > 0 && in[iLen-1] == '=') --iLen;
+ int oLen = (iLen*3) / 4;
+ byte[] out = new byte[oLen];
+ int ip = 0;
+ int op = 0;
+ while (ip < iLen) {
+ int i0 = in[ip++];
+ int i1 = in[ip++];
+ int i2 = ip < iLen ? in[ip++] : 'A';
+ int i3 = ip < iLen ? in[ip++] : 'A';
+ if (i0 > 127 || i1 > 127 || i2 > 127 || i3 > 127)
+ throw new IllegalArgumentException ();
+ int b0 = map2[i0];
+ int b1 = map2[i1];
+ int b2 = map2[i2];
+ int b3 = map2[i3];
+ if (b0 < 0 || b1 < 0 || b2 < 0 || b3 < 0)
+ throw new IllegalArgumentException (Locale.getString("ILLEGAL_CHARACTER")); //$NON-NLS-1$
+ int o0 = ( b0 <<2) | (b1>>>4);
+ int o1 = ((b1 & 0xf)<<4) | (b2>>>2);
+ int o2 = ((b2 & 3)<<6) | b3;
+ out[op++] = (byte)o0;
+ if (op<oLen) out[op++] = (byte)o1;
+ if (op<oLen) out[op++] = (byte)o2;
+ }
+ return out;
+ }
+
+}
\ No newline at end of file
Added: trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder.properties
===================================================================
--- trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder.properties (rev 0)
+++ trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder.properties 2012-08-20 08:43:19 UTC (rev 377)
@@ -0,0 +1,26 @@
+# $Id$
+#
+# Copyright (c) 2010, Multiagent Team,
+# Laboratoire Systemes et Transports,
+# Universite de Technologie de Belfort-Montbeliard.
+# All rights reserved.
+#
+# Copyright (C) 2012 Stephane GALLAND.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+# This program is free software; you can redistribute it and/or modify
+
+INVALID_STRING_LENGTH = Length of the Base64 encoded input string is not a multiple of 4
+ILLEGAL_CHARACTER = Illegal character in Base64 encoded data
\ No newline at end of file
Added: trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_es.properties
===================================================================
--- trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_es.properties (rev 0)
+++ trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_es.properties 2012-08-20 08:43:19 UTC (rev 377)
@@ -0,0 +1,26 @@
+# $Id$
+#
+# Copyright (c) 2010, Multiagent Team,
+# Laboratoire Systemes et Transports,
+# Universite de Technologie de Belfort-Montbeliard.
+# All rights reserved.
+#
+# Copyright (C) 2012 Stephane GALLAND.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+# This program is free software; you can redistribute it and/or modify
+
+INVALID_STRING_LENGTH = El tama\xF1o de la cadena codificada en base 64 debe ser un m\xFAltiplo de 4
+ILLEGAL_CHARACTER = Car\xE1cter no v\xE1lido en la base de datos 64
Added: trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_fr.properties
===================================================================
--- trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_fr.properties (rev 0)
+++ trunk/arakhneText/src/main/resources/org/arakhne/util/text/Base64Coder_fr.properties 2012-08-20 08:43:19 UTC (rev 377)
@@ -0,0 +1,26 @@
+# $Id$
+#
+# Copyright (c) 2010, Multiagent Team,
+# Laboratoire Systemes et Transports,
+# Universite de Technologie de Belfort-Montbeliard.
+# All rights reserved.
+#
+# Copyright (C) 2012 Stephane GALLAND.
+#
+# This library is free software; you can redistribute it and/or
+# modify it under the terms of the GNU Lesser General Public
+# License as published by the Free Software Foundation; either
+# version 2.1 of the License, or (at your option) any later version.
+#
+# This library 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
+# Lesser General Public License for more details.
+#
+# You should have received a copy of the GNU Lesser General Public
+# License along with this library; if not, write to the Free Software
+# Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
+# This program is free software; you can redistribute it and/or modify
+
+INVALID_STRING_LENGTH = La taille de la cha\xEEne encod\xE9e en base 64 doit \xEAtre un multiple de 4
+ILLEGAL_CHARACTER = Caract\xE8re invalide dans les donn\xE9es en base 64