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- /*
- * 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
- }
- }
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