+++ /dev/null
-/*
- * 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.
- */
-
-package org.apache.thrift.protocol;
-
-/**
- * Class for encoding and decoding Base64 data.
- *
- * This class is kept at package level because the interface does no input
- * validation and is therefore too low-level for generalized reuse.
- *
- * Note also that the encoding does not pad with equal signs , as discussed in
- * section 2.2 of the RFC (http://www.faqs.org/rfcs/rfc3548.html). Furthermore,
- * bad data encountered when decoding is neither rejected or ignored but simply
- * results in bad decoded data -- this is not in compliance with the RFC but is
- * done in the interest of performance.
- *
- */
-class TBase64Utils {
-
- private static final String ENCODE_TABLE =
- "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
-
- /**
- * Encode len bytes of data in src at offset srcOff, storing the result into
- * dst at offset dstOff. len must be 1, 2, or 3. dst must have at least len+1
- * bytes of space at dstOff. src and dst should not be the same object. This
- * method does no validation of the input values in the interest of
- * performance.
- *
- * @param src the source of bytes to encode
- * @param srcOff the offset into the source to read the unencoded bytes
- * @param len the number of bytes to encode (must be 1, 2, or 3).
- * @param dst the destination for the encoding
- * @param dstOff the offset into the destination to place the encoded bytes
- */
- static final void encode(byte[] src, int srcOff, int len, byte[] dst,
- int dstOff) {
- dst[dstOff] = (byte)ENCODE_TABLE.charAt((src[srcOff] >> 2) & 0x3F);
- if (len == 3) {
- dst[dstOff + 1] =
- (byte)ENCODE_TABLE.charAt(
- ((src[srcOff] << 4) & 0x30) | ((src[srcOff+1] >> 4) & 0x0F));
- dst[dstOff + 2] =
- (byte)ENCODE_TABLE.charAt(
- ((src[srcOff+1] << 2) & 0x3C) | ((src[srcOff+2] >> 6) & 0x03));
- dst[dstOff + 3] =
- (byte)ENCODE_TABLE.charAt(src[srcOff+2] & 0x3F);
- }
- else if (len == 2) {
- dst[dstOff+1] =
- (byte)ENCODE_TABLE.charAt(
- ((src[srcOff] << 4) & 0x30) | ((src[srcOff+1] >> 4) & 0x0F));
- dst[dstOff + 2] =
- (byte)ENCODE_TABLE.charAt((src[srcOff+1] << 2) & 0x3C);
- }
- else { // len == 1) {
- dst[dstOff + 1] =
- (byte)ENCODE_TABLE.charAt((src[srcOff] << 4) & 0x30);
- }
- }
-
- private static final byte[] DECODE_TABLE = {
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,62,-1,-1,-1,63,
- 52,53,54,55,56,57,58,59,60,61,-1,-1,-1,-1,-1,-1,
- -1, 0, 1, 2, 3, 4, 5, 6, 7, 8, 9,10,11,12,13,14,
- 15,16,17,18,19,20,21,22,23,24,25,-1,-1,-1,-1,-1,
- -1,26,27,28,29,30,31,32,33,34,35,36,37,38,39,40,
- 41,42,43,44,45,46,47,48,49,50,51,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,
- };
-
- /**
- * Decode len bytes of data in src at offset srcOff, storing the result into
- * dst at offset dstOff. len must be 2, 3, or 4. dst must have at least len-1
- * bytes of space at dstOff. src and dst may be the same object as long as
- * dstoff <= srcOff. This method does no validation of the input values in
- * the interest of performance.
- *
- * @param src the source of bytes to decode
- * @param srcOff the offset into the source to read the encoded bytes
- * @param len the number of bytes to decode (must be 2, 3, or 4)
- * @param dst the destination for the decoding
- * @param dstOff the offset into the destination to place the decoded bytes
- */
- static final void decode(byte[] src, int srcOff, int len, byte[] dst,
- int dstOff) {
- dst[dstOff] = (byte)
- ((DECODE_TABLE[src[srcOff] & 0x0FF] << 2) |
- (DECODE_TABLE[src[srcOff+1] & 0x0FF] >> 4));
- if (len > 2) {
- dst[dstOff+1] = (byte)
- (((DECODE_TABLE[src[srcOff+1] & 0x0FF] << 4) & 0xF0) |
- (DECODE_TABLE[src[srcOff+2] & 0x0FF] >> 2));
- if (len > 3) {
- dst[dstOff+2] = (byte)
- (((DECODE_TABLE[src[srcOff+2] & 0x0FF] << 6) & 0xC0) |
- DECODE_TABLE[src[srcOff+3] & 0x0FF]);
- }
- }
- }
-}
projects / ceph.git / blobdiff