diff options
Diffstat (limited to 'java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/Base64InputStream.java')
| -rw-r--r-- | java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/Base64InputStream.java | 151 |
1 files changed, 0 insertions, 151 deletions
diff --git a/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/Base64InputStream.java b/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/Base64InputStream.java deleted file mode 100644 index 77f5d7d4a..000000000 --- a/java/com/android/voicemailomtp/src/org/apache/james/mime4j/decoder/Base64InputStream.java +++ /dev/null @@ -1,151 +0,0 @@ -/**************************************************************** - * Licensed to the Apache Software Foundation (ASF) under one * - * or more contributor license agreements. See the NOTICE file * - * distributed with this work for additional information * - * regarding copyright ownership. The ASF licenses this file * - * to you 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. * - ****************************************************************/ - -/** - * Modified to improve efficiency by Android 21-Aug-2009 - */ - -package org.apache.james.mime4j.decoder; - -import java.io.IOException; -import java.io.InputStream; - -/** - * Performs Base-64 decoding on an underlying stream. - * - * - * @version $Id: Base64InputStream.java,v 1.3 2004/11/29 13:15:47 ntherning Exp $ - */ -public class Base64InputStream extends InputStream { - private final InputStream s; - private int outCount = 0; - private int outIndex = 0; - private final int[] outputBuffer = new int[3]; - private final byte[] inputBuffer = new byte[4]; - private boolean done = false; - - public Base64InputStream(InputStream s) { - this.s = s; - } - - /** - * Closes the underlying stream. - * - * @throws IOException on I/O errors. - */ - @Override - public void close() throws IOException { - s.close(); - } - - @Override - public int read() throws IOException { - if (outIndex == outCount) { - fillBuffer(); - if (outIndex == outCount) { - return -1; - } - } - - return outputBuffer[outIndex++]; - } - - /** - * Retrieve data from the underlying stream, decode it, - * and put the results in the byteq. - * @throws IOException - */ - private void fillBuffer() throws IOException { - outCount = 0; - outIndex = 0; - int inCount = 0; - - int i; - // "done" is needed for the two successive '=' at the end - while (!done) { - switch (i = s.read()) { - case -1: - // No more input - just return, let outputBuffer drain out, and be done - return; - case '=': - // once we meet the first '=', avoid reading the second '=' - done = true; - decodeAndEnqueue(inCount); - return; - default: - byte sX = TRANSLATION[i]; - if (sX < 0) continue; - inputBuffer[inCount++] = sX; - if (inCount == 4) { - decodeAndEnqueue(inCount); - return; - } - break; - } - } - } - - private void decodeAndEnqueue(int len) { - int accum = 0; - accum |= inputBuffer[0] << 18; - accum |= inputBuffer[1] << 12; - accum |= inputBuffer[2] << 6; - accum |= inputBuffer[3]; - - // There's a bit of duplicated code here because we want to have straight-through operation - // for the most common case of len==4 - if (len == 4) { - outputBuffer[0] = (accum >> 16) & 0xFF; - outputBuffer[1] = (accum >> 8) & 0xFF; - outputBuffer[2] = (accum) & 0xFF; - outCount = 3; - return; - } else if (len == 3) { - outputBuffer[0] = (accum >> 16) & 0xFF; - outputBuffer[1] = (accum >> 8) & 0xFF; - outCount = 2; - return; - } else { // len == 2 - outputBuffer[0] = (accum >> 16) & 0xFF; - outCount = 1; - return; - } - } - - private static byte[] TRANSLATION = { - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x00 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x10 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, 62, -1, -1, -1, 63, /* 0x20 */ - 52, 53, 54, 55, 56, 57, 58, 59, 60, 61, -1, -1, -1, -1, -1, -1, /* 0x30 */ - -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, /* 0x40 */ - 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, -1, -1, -1, -1, -1, /* 0x50 */ - -1, 26, 27, 28, 29, 30, 31, 32, 33, 34, 35, 36, 37, 38, 39, 40, /* 0x60 */ - 41, 42, 43, 44, 45, 46, 47, 48, 49, 50, 51, -1, -1, -1, -1, -1, /* 0x70 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x80 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0x90 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xA0 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xB0 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xC0 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xD0 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, /* 0xE0 */ - -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1, -1 /* 0xF0 */ - }; - - -} |