| /* |
| * Copyright (C) 2008, Shawn O. Pearce <spearce@spearce.org> |
| * and other copyright owners as documented in the project's IP log. |
| * |
| * This program and the accompanying materials are made available |
| * under the terms of the Eclipse Distribution License v1.0 which |
| * accompanies this distribution, is reproduced below, and is |
| * available at http://www.eclipse.org/org/documents/edl-v10.php |
| * |
| * All rights reserved. |
| * |
| * Redistribution and use in source and binary forms, with or |
| * without modification, are permitted provided that the following |
| * conditions are met: |
| * |
| * - Redistributions of source code must retain the above copyright |
| * notice, this list of conditions and the following disclaimer. |
| * |
| * - Redistributions in binary form must reproduce the above |
| * copyright notice, this list of conditions and the following |
| * disclaimer in the documentation and/or other materials provided |
| * with the distribution. |
| * |
| * - Neither the name of the Eclipse Foundation, Inc. nor the |
| * names of its contributors may be used to endorse or promote |
| * products derived from this software without specific prior |
| * written permission. |
| * |
| * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND |
| * CONTRIBUTORS "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, |
| * INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES |
| * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE |
| * ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT OWNER OR |
| * CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, |
| * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT |
| * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; |
| * LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER |
| * CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, |
| * STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) |
| * ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF |
| * ADVISED OF THE POSSIBILITY OF SUCH DAMAGE. |
| */ |
| |
| package org.eclipse.jgit.util; |
| |
| /** |
| * A rough character sequence around a raw byte buffer. |
| * <p> |
| * Characters are assumed to be 8-bit US-ASCII. |
| */ |
| public final class RawCharSequence implements CharSequence { |
| /** A zero-length character sequence. */ |
| public static final RawCharSequence EMPTY = new RawCharSequence(null, 0, 0); |
| |
| final byte[] buffer; |
| |
| final int startPtr; |
| |
| final int endPtr; |
| |
| /** |
| * Create a rough character sequence around the raw byte buffer. |
| * |
| * @param buf |
| * buffer to scan. |
| * @param start |
| * starting position for the sequence. |
| * @param end |
| * ending position for the sequence. |
| */ |
| public RawCharSequence(final byte[] buf, final int start, final int end) { |
| buffer = buf; |
| startPtr = start; |
| endPtr = end; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public char charAt(final int index) { |
| return (char) (buffer[startPtr + index] & 0xff); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public int length() { |
| return endPtr - startPtr; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public CharSequence subSequence(final int start, final int end) { |
| return new RawCharSequence(buffer, startPtr + start, startPtr + end); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override |
| public String toString() { |
| final int n = length(); |
| final StringBuilder b = new StringBuilder(n); |
| for (int i = 0; i < n; i++) |
| b.append(charAt(i)); |
| return b.toString(); |
| } |
| } |