| /* |
| * Copyright (C) 2010, Google Inc. |
| * 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; |
| |
| /** |
| * Utility class for character functions on raw bytes |
| * <p> |
| * Characters are assumed to be 8-bit US-ASCII. |
| */ |
| public class RawCharUtil { |
| private static final boolean[] WHITESPACE = new boolean[256]; |
| |
| static { |
| WHITESPACE['\r'] = true; |
| WHITESPACE['\n'] = true; |
| WHITESPACE['\t'] = true; |
| WHITESPACE[' '] = true; |
| } |
| |
| /** |
| * Determine if an 8-bit US-ASCII encoded character is represents whitespace |
| * |
| * @param c |
| * the 8-bit US-ASCII encoded character |
| * @return true if c represents a whitespace character in 8-bit US-ASCII |
| */ |
| public static boolean isWhitespace(byte c) { |
| return WHITESPACE[c & 0xff]; |
| } |
| |
| /** |
| * Returns the new end point for the byte array passed in after trimming any |
| * trailing whitespace characters, as determined by the isWhitespace() |
| * function. start and end are assumed to be within the bounds of raw. |
| * |
| * @param raw |
| * the byte array containing the portion to trim whitespace for |
| * @param start |
| * the start of the section of bytes |
| * @param end |
| * the end of the section of bytes |
| * @return the new end point |
| */ |
| public static int trimTrailingWhitespace(byte[] raw, int start, int end) { |
| int ptr = end - 1; |
| while (start <= ptr && isWhitespace(raw[ptr])) |
| ptr--; |
| |
| return ptr + 1; |
| } |
| |
| /** |
| * Returns the new start point for the byte array passed in after trimming |
| * any leading whitespace characters, as determined by the isWhitespace() |
| * function. start and end are assumed to be within the bounds of raw. |
| * |
| * @param raw |
| * the byte array containing the portion to trim whitespace for |
| * @param start |
| * the start of the section of bytes |
| * @param end |
| * the end of the section of bytes |
| * @return the new start point |
| */ |
| public static int trimLeadingWhitespace(byte[] raw, int start, int end) { |
| while (start < end && isWhitespace(raw[start])) |
| start++; |
| |
| return start; |
| } |
| |
| private RawCharUtil() { |
| // This will never be called |
| } |
| } |