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/*
* Copyright 2014, Google Inc.
* 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 Google 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.jf.util;
import javax.annotation.Nonnull;
import java.util.regex.Matcher;
import java.util.regex.Pattern;
public class TextUtils {
private static String newline = System.getProperty("line.separator");
@Nonnull
public static String normalizeNewlines(@Nonnull String source) {
return normalizeNewlines(source, newline);
}
@Nonnull
public static String normalizeNewlines(@Nonnull String source, String newlineValue) {
return source.replace("\r", "").replace("\n", newlineValue);
}
@Nonnull
public static String normalizeWhitespace(@Nonnull String source) {
// Go to native system new lines so that ^/$ work correctly
source = normalizeNewlines(source);
// Remove all suffix/prefix whitespace
Pattern pattern = Pattern.compile("((^[ \t]+)|([ \t]+$))", Pattern.MULTILINE);
Matcher matcher = pattern.matcher(source);
source = matcher.replaceAll("");
// Remove all empty lines
Pattern pattern2 = Pattern.compile("^\r?\n?", Pattern.MULTILINE);
Matcher matcher2 = pattern2.matcher(source);
source = matcher2.replaceAll("");
// Remove a trailing new line, if present
Pattern pattern3 = Pattern.compile("\r?\n?$");
Matcher matcher3 = pattern3.matcher(source);
source = matcher3.replaceAll("");
// Go back to unix-style \n newlines
source = normalizeNewlines(source, "\n");
return source;
}
@Nonnull
public static String stripComments(@Nonnull String source) {
Pattern pattern = Pattern.compile("#(.*)");
Matcher matcher = pattern.matcher(source);
return matcher.replaceAll("");
}
}
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