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- /*
- * 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;
- }
-
- public char charAt(final int index) {
- return (char) (buffer[startPtr + index] & 0xff);
- }
-
- public int length() {
- return endPtr - startPtr;
- }
-
- public CharSequence subSequence(final int start, final int end) {
- return new RawCharSequence(buffer, startPtr + start, startPtr + end);
- }
-
- @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();
- }
- }
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