Back to project page ProjectTimer.
The source code is released under:
Copyright (c) 2012 Alex Wu Permission is hereby granted, free of charge, to any person obtaining a copy of this software and associated documentation files (the "Software"), to deal in the Software w...
If you think the Android project ProjectTimer listed in this page is inappropriate, such as containing malicious code/tools or violating the copyright, please email info at java2s dot com, thanks.
// Portions copyright 2002, Google, Inc. //// w w w .j av a 2s. c o m // 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.cooltofu.util; // This code was converted from code at http://iharder.sourceforge.net/base64/ // Lots of extraneous features were removed. /* The original code said: * <p> * I am placing this code in the Public Domain. Do with it as you will. * This software comes with no guarantees or warranties but with * plenty of well-wishing instead! * Please visit * <a href="http://iharder.net/xmlizable">http://iharder.net/xmlizable</a> * periodically to check for updates or to contribute improvements. * </p> * * @author Robert Harder * @author rharder@usa.net * @version 1.3 */ /** * Base64 converter class. This code is not a complete MIME encoder; * it simply converts binary data to base64 data and back. * * <p>Note {@link CharBase64} is a GWT-compatible implementation of this * class. */ public class Base64 { /** Specify encoding (value is {@code true}). */ public final static boolean ENCODE = true; /** Specify decoding (value is {@code false}). */ public final static boolean DECODE = false; /** The equals sign (=) as a byte. */ private final static byte EQUALS_SIGN = (byte) '='; /** The new line character (\n) as a byte. */ private final static byte NEW_LINE = (byte) '\n'; /** * The 64 valid Base64 values. */ private final static byte[] ALPHABET = {(byte) 'A', (byte) 'B', (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F', (byte) 'G', (byte) 'H', (byte) 'I', (byte) 'J', (byte) 'K', (byte) 'L', (byte) 'M', (byte) 'N', (byte) 'O', (byte) 'P', (byte) 'Q', (byte) 'R', (byte) 'S', (byte) 'T', (byte) 'U', (byte) 'V', (byte) 'W', (byte) 'X', (byte) 'Y', (byte) 'Z', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f', (byte) 'g', (byte) 'h', (byte) 'i', (byte) 'j', (byte) 'k', (byte) 'l', (byte) 'm', (byte) 'n', (byte) 'o', (byte) 'p', (byte) 'q', (byte) 'r', (byte) 's', (byte) 't', (byte) 'u', (byte) 'v', (byte) 'w', (byte) 'x', (byte) 'y', (byte) 'z', (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) '+', (byte) '/'}; /** * The 64 valid web safe Base64 values. */ private final static byte[] WEBSAFE_ALPHABET = {(byte) 'A', (byte) 'B', (byte) 'C', (byte) 'D', (byte) 'E', (byte) 'F', (byte) 'G', (byte) 'H', (byte) 'I', (byte) 'J', (byte) 'K', (byte) 'L', (byte) 'M', (byte) 'N', (byte) 'O', (byte) 'P', (byte) 'Q', (byte) 'R', (byte) 'S', (byte) 'T', (byte) 'U', (byte) 'V', (byte) 'W', (byte) 'X', (byte) 'Y', (byte) 'Z', (byte) 'a', (byte) 'b', (byte) 'c', (byte) 'd', (byte) 'e', (byte) 'f', (byte) 'g', (byte) 'h', (byte) 'i', (byte) 'j', (byte) 'k', (byte) 'l', (byte) 'm', (byte) 'n', (byte) 'o', (byte) 'p', (byte) 'q', (byte) 'r', (byte) 's', (byte) 't', (byte) 'u', (byte) 'v', (byte) 'w', (byte) 'x', (byte) 'y', (byte) 'z', (byte) '0', (byte) '1', (byte) '2', (byte) '3', (byte) '4', (byte) '5', (byte) '6', (byte) '7', (byte) '8', (byte) '9', (byte) '-', (byte) '_'}; /** * Translates a Base64 value to either its 6-bit reconstruction value * or a negative number indicating some other meaning. **/ private final static byte[] DECODABET = {-9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 0 - 8 -5, -5, // Whitespace: Tab and Linefeed -9, -9, // Decimal 11 - 12 -5, // Whitespace: Carriage Return -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 14 - 26 -9, -9, -9, -9, -9, // Decimal 27 - 31 -5, // Whitespace: Space -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 33 - 42 62, // Plus sign at decimal 43 -9, -9, -9, // Decimal 44 - 46 63, // Slash at decimal 47 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, // Numbers zero through nine -9, -9, -9, // Decimal 58 - 60 -1, // Equals sign at decimal 61 -9, -9, -9, // Decimal 62 - 64 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, // Letters 'A' through 'N' 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // Letters 'O' through 'Z' -9, -9, -9, -9, -9, -9, // Decimal 91 - 96 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, // Letters 'a' through 'm' 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, // Letters 'n' through 'z' -9, -9, -9, -9, -9 // Decimal 123 - 127 /* ,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 128 - 139 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 140 - 152 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 153 - 165 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 166 - 178 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 179 - 191 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 192 - 204 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 205 - 217 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 218 - 230 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 231 - 243 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9 // Decimal 244 - 255 */ }; /** The web safe decodabet */ private final static byte[] WEBSAFE_DECODABET = {-9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 0 - 8 -5, -5, // Whitespace: Tab and Linefeed -9, -9, // Decimal 11 - 12 -5, // Whitespace: Carriage Return -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 14 - 26 -9, -9, -9, -9, -9, // Decimal 27 - 31 -5, // Whitespace: Space -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, -9, // Decimal 33 - 44 62, // Dash '-' sign at decimal 45 -9, -9, // Decimal 46-47 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, // Numbers zero through nine -9, -9, -9, // Decimal 58 - 60 -1, // Equals sign at decimal 61 -9, -9, -9, // Decimal 62 - 64 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, // Letters 'A' through 'N' 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, // Letters 'O' through 'Z' -9, -9, -9, -9, // Decimal 91-94 63, // Underscore '_' at decimal 95 -9, // Decimal 96 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, // Letters 'a' through 'm' 39, 40, 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, // Letters 'n' through 'z' -9, -9, -9, -9, -9 // Decimal 123 - 127 /* ,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 128 - 139 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 140 - 152 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 153 - 165 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 166 - 178 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 179 - 191 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 192 - 204 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 205 - 217 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 218 - 230 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9, // Decimal 231 - 243 -9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9,-9 // Decimal 244 - 255 */ }; // Indicates white space in encoding private final static byte WHITE_SPACE_ENC = -5; // Indicates equals sign in encoding private final static byte EQUALS_SIGN_ENC = -1; /** Defeats instantiation. */ private Base64() { } /* ******** E N C O D I N G M E T H O D S ******** */ /** * Encodes up to three bytes of the array <var>source</var> * and writes the resulting four Base64 bytes to <var>destination</var>. * The source and destination arrays can be manipulated * anywhere along their length by specifying * <var>srcOffset</var> and <var>destOffset</var>. * This method does not check to make sure your arrays * are large enough to accommodate <var>srcOffset</var> + 3 for * the <var>source</var> array or <var>destOffset</var> + 4 for * the <var>destination</var> array. * The actual number of significant bytes in your array is * given by <var>numSigBytes</var>. * * @param source the array to convert * @param srcOffset the index where conversion begins * @param numSigBytes the number of significant bytes in your array * @param destination the array to hold the conversion * @param destOffset the index where output will be put * @param alphabet is the encoding alphabet * @return the <var>destination</var> array * @since 1.3 */ private static byte[] encode3to4(byte[] source, int srcOffset, int numSigBytes, byte[] destination, int destOffset, byte[] alphabet) { // 1 2 3 // 01234567890123456789012345678901 Bit position // --------000000001111111122222222 Array position from threeBytes // --------| || || || | Six bit groups to index alphabet // >>18 >>12 >> 6 >> 0 Right shift necessary // 0x3f 0x3f 0x3f Additional AND // Create buffer with zero-padding if there are only one or two // significant bytes passed in the array. // We have to shift left 24 in order to flush out the 1's that appear // when Java treats a value as negative that is cast from a byte to an int. int inBuff = (numSigBytes > 0 ? ((source[srcOffset] << 24) >>> 8) : 0) | (numSigBytes > 1 ? ((source[srcOffset + 1] << 24) >>> 16) : 0) | (numSigBytes > 2 ? ((source[srcOffset + 2] << 24) >>> 24) : 0); switch (numSigBytes) { case 3: destination[destOffset] = alphabet[(inBuff >>> 18)]; destination[destOffset + 1] = alphabet[(inBuff >>> 12) & 0x3f]; destination[destOffset + 2] = alphabet[(inBuff >>> 6) & 0x3f]; destination[destOffset + 3] = alphabet[(inBuff) & 0x3f]; return destination; case 2: destination[destOffset] = alphabet[(inBuff >>> 18)]; destination[destOffset + 1] = alphabet[(inBuff >>> 12) & 0x3f]; destination[destOffset + 2] = alphabet[(inBuff >>> 6) & 0x3f]; destination[destOffset + 3] = EQUALS_SIGN; return destination; case 1: destination[destOffset] = alphabet[(inBuff >>> 18)]; destination[destOffset + 1] = alphabet[(inBuff >>> 12) & 0x3f]; destination[destOffset + 2] = EQUALS_SIGN; destination[destOffset + 3] = EQUALS_SIGN; return destination; default: return destination; } // end switch } // end encode3to4 /** * Encodes a byte array into Base64 notation. * Equivalent to calling * {@code encodeBytes(source, 0, source.length)} * * @param source The data to convert * @since 1.4 */ public static String encode(byte[] source) { return encode(source, 0, source.length, ALPHABET, true); } /** * Encodes a byte array into web safe Base64 notation. * * @param source The data to convert * @param doPadding is {@code true} to pad result with '=' chars * if it does not fall on 3 byte boundaries */ public static String encodeWebSafe(byte[] source, boolean doPadding) { return encode(source, 0, source.length, WEBSAFE_ALPHABET, doPadding); } /** * Encodes a byte array into Base64 notation. * * @param source the data to convert * @param off offset in array where conversion should begin * @param len length of data to convert * @param alphabet the encoding alphabet * @param doPadding is {@code true} to pad result with '=' chars * if it does not fall on 3 byte boundaries * @since 1.4 */ public static String encode(byte[] source, int off, int len, byte[] alphabet, boolean doPadding) { byte[] outBuff = encode(source, off, len, alphabet, Integer.MAX_VALUE); int outLen = outBuff.length; // If doPadding is false, set length to truncate '=' // padding characters while (doPadding == false && outLen > 0) { if (outBuff[outLen - 1] != '=') { break; } outLen -= 1; } return new String(outBuff, 0, outLen); } /** * Encodes a byte array into Base64 notation. * * @param source the data to convert * @param off offset in array where conversion should begin * @param len length of data to convert * @param alphabet is the encoding alphabet * @param maxLineLength maximum length of one line. * @return the BASE64-encoded byte array */ public static byte[] encode(byte[] source, int off, int len, byte[] alphabet, int maxLineLength) { int lenDiv3 = (len + 2) / 3; // ceil(len / 3) int len43 = lenDiv3 * 4; byte[] outBuff = new byte[len43 // Main 4:3 + (len43 / maxLineLength)]; // New lines int d = 0; int e = 0; int len2 = len - 2; int lineLength = 0; for (; d < len2; d += 3, e += 4) { // The following block of code is the same as // encode3to4( source, d + off, 3, outBuff, e, alphabet ); // but inlined for faster encoding (~20% improvement) int inBuff = ((source[d + off] << 24) >>> 8) | ((source[d + 1 + off] << 24) >>> 16) | ((source[d + 2 + off] << 24) >>> 24); outBuff[e] = alphabet[(inBuff >>> 18)]; outBuff[e + 1] = alphabet[(inBuff >>> 12) & 0x3f]; outBuff[e + 2] = alphabet[(inBuff >>> 6) & 0x3f]; outBuff[e + 3] = alphabet[(inBuff) & 0x3f]; lineLength += 4; if (lineLength == maxLineLength) { outBuff[e + 4] = NEW_LINE; e++; lineLength = 0; } // end if: end of line } // end for: each piece of array if (d < len) { encode3to4(source, d + off, len - d, outBuff, e, alphabet); lineLength += 4; if (lineLength == maxLineLength) { // Add a last newline outBuff[e + 4] = NEW_LINE; e++; } e += 4; } assert (e == outBuff.length); return outBuff; } /* ******** D E C O D I N G M E T H O D S ******** */ /** * Decodes four bytes from array <var>source</var> * and writes the resulting bytes (up to three of them) * to <var>destination</var>. * The source and destination arrays can be manipulated * anywhere along their length by specifying * <var>srcOffset</var> and <var>destOffset</var>. * This method does not check to make sure your arrays * are large enough to accommodate <var>srcOffset</var> + 4 for * the <var>source</var> array or <var>destOffset</var> + 3 for * the <var>destination</var> array. * This method returns the actual number of bytes that * were converted from the Base64 encoding. * * * @param source the array to convert * @param srcOffset the index where conversion begins * @param destination the array to hold the conversion * @param destOffset the index where output will be put * @param decodabet the decodabet for decoding Base64 content * @return the number of decoded bytes converted * @since 1.3 */ private static int decode4to3(byte[] source, int srcOffset, byte[] destination, int destOffset, byte[] decodabet) { // Example: Dk== if (source[srcOffset + 2] == EQUALS_SIGN) { int outBuff = ((decodabet[source[srcOffset]] << 24) >>> 6) | ((decodabet[source[srcOffset + 1]] << 24) >>> 12); destination[destOffset] = (byte) (outBuff >>> 16); return 1; } else if (source[srcOffset + 3] == EQUALS_SIGN) { // Example: DkL= int outBuff = ((decodabet[source[srcOffset]] << 24) >>> 6) | ((decodabet[source[srcOffset + 1]] << 24) >>> 12) | ((decodabet[source[srcOffset + 2]] << 24) >>> 18); destination[destOffset] = (byte) (outBuff >>> 16); destination[destOffset + 1] = (byte) (outBuff >>> 8); return 2; } else { // Example: DkLE int outBuff = ((decodabet[source[srcOffset]] << 24) >>> 6) | ((decodabet[source[srcOffset + 1]] << 24) >>> 12) | ((decodabet[source[srcOffset + 2]] << 24) >>> 18) | ((decodabet[source[srcOffset + 3]] << 24) >>> 24); destination[destOffset] = (byte) (outBuff >> 16); destination[destOffset + 1] = (byte) (outBuff >> 8); destination[destOffset + 2] = (byte) (outBuff); return 3; } } // end decodeToBytes /** * Decodes data from Base64 notation. * * @param s the string to decode (decoded in default encoding) * @return the decoded data * @since 1.4 */ public static byte[] decode(String s) throws Base64DecoderException { byte[] bytes = s.getBytes(); return decode(bytes, 0, bytes.length); } /** * Decodes data from web safe Base64 notation. * Web safe encoding uses '-' instead of '+', '_' instead of '/' * * @param s the string to decode (decoded in default encoding) * @return the decoded data */ public static byte[] decodeWebSafe(String s) throws Base64DecoderException { byte[] bytes = s.getBytes(); return decodeWebSafe(bytes, 0, bytes.length); } /** * Decodes Base64 content in byte array format and returns * the decoded byte array. * * @param source The Base64 encoded data * @return decoded data * @since 1.3 * @throws Base64DecoderException */ public static byte[] decode(byte[] source) throws Base64DecoderException { return decode(source, 0, source.length); } /** * Decodes web safe Base64 content in byte array format and returns * the decoded data. * Web safe encoding uses '-' instead of '+', '_' instead of '/' * * @param source the string to decode (decoded in default encoding) * @return the decoded data */ public static byte[] decodeWebSafe(byte[] source) throws Base64DecoderException { return decodeWebSafe(source, 0, source.length); } /** * Decodes Base64 content in byte array format and returns * the decoded byte array. * * @param source the Base64 encoded data * @param off the offset of where to begin decoding * @param len the length of characters to decode * @return decoded data * @since 1.3 * @throws Base64DecoderException */ public static byte[] decode(byte[] source, int off, int len) throws Base64DecoderException { return decode(source, off, len, DECODABET); } /** * Decodes web safe Base64 content in byte array format and returns * the decoded byte array. * Web safe encoding uses '-' instead of '+', '_' instead of '/' * * @param source the Base64 encoded data * @param off the offset of where to begin decoding * @param len the length of characters to decode * @return decoded data */ public static byte[] decodeWebSafe(byte[] source, int off, int len) throws Base64DecoderException { return decode(source, off, len, WEBSAFE_DECODABET); } /** * Decodes Base64 content using the supplied decodabet and returns * the decoded byte array. * * @param source the Base64 encoded data * @param off the offset of where to begin decoding * @param len the length of characters to decode * @param decodabet the decodabet for decoding Base64 content * @return decoded data */ public static byte[] decode(byte[] source, int off, int len, byte[] decodabet) throws Base64DecoderException { int len34 = len * 3 / 4; byte[] outBuff = new byte[2 + len34]; // Upper limit on size of output int outBuffPosn = 0; byte[] b4 = new byte[4]; int b4Posn = 0; int i = 0; byte sbiCrop = 0; byte sbiDecode = 0; for (i = 0; i < len; i++) { sbiCrop = (byte) (source[i + off] & 0x7f); // Only the low seven bits sbiDecode = decodabet[sbiCrop]; if (sbiDecode >= WHITE_SPACE_ENC) { // White space Equals sign or better if (sbiDecode >= EQUALS_SIGN_ENC) { // An equals sign (for padding) must not occur at position 0 or 1 // and must be the last byte[s] in the encoded value if (sbiCrop == EQUALS_SIGN) { int bytesLeft = len - i; byte lastByte = (byte) (source[len - 1 + off] & 0x7f); if (b4Posn == 0 || b4Posn == 1) { throw new Base64DecoderException( "invalid padding byte '=' at byte offset " + i); } else if ((b4Posn == 3 && bytesLeft > 2) || (b4Posn == 4 && bytesLeft > 1)) { throw new Base64DecoderException( "padding byte '=' falsely signals end of encoded value " + "at offset " + i); } else if (lastByte != EQUALS_SIGN && lastByte != NEW_LINE) { throw new Base64DecoderException( "encoded value has invalid trailing byte"); } break; } b4[b4Posn++] = sbiCrop; if (b4Posn == 4) { outBuffPosn += decode4to3(b4, 0, outBuff, outBuffPosn, decodabet); b4Posn = 0; } } } else { throw new Base64DecoderException("Bad Base64 input character at " + i + ": " + source[i + off] + "(decimal)"); } } // Because web safe encoding allows non padding base64 encodes, we // need to pad the rest of the b4 buffer with equal signs when // b4Posn != 0. There can be at most 2 equal signs at the end of // four characters, so the b4 buffer must have two or three // characters. This also catches the case where the input is // padded with EQUALS_SIGN if (b4Posn != 0) { if (b4Posn == 1) { throw new Base64DecoderException("single trailing character at offset " + (len - 1)); } b4[b4Posn++] = EQUALS_SIGN; outBuffPosn += decode4to3(b4, 0, outBuff, outBuffPosn, decodabet); } byte[] out = new byte[outBuffPosn]; System.arraycopy(outBuff, 0, out, 0, outBuffPosn); return out; } }