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/*
* Copyright (C) 2014, Andrey Loskutov <loskutov@gmx.de> and others
*
* This program and the accompanying materials are made available under the
* terms of the Eclipse Distribution License v. 1.0 which is available at
* https://www.eclipse.org/org/documents/edl-v10.php.
*
* SPDX-License-Identifier: BSD-3-Clause
*/
package org.eclipse.jgit.ignore.internal;
import static org.eclipse.jgit.ignore.internal.Strings.getPathSeparator;
/**
* Matcher built from patterns for file names (single path segments). This class
* is immutable and thread safe.
*/
public class NameMatcher extends AbstractMatcher {
final boolean beginning;
final char slash;
final String subPattern;
NameMatcher(String pattern, Character pathSeparator, boolean dirOnly,
boolean deleteBackslash) {
super(pattern, dirOnly);
slash = getPathSeparator(pathSeparator);
if (deleteBackslash) {
pattern = Strings.deleteBackslash(pattern);
}
beginning = pattern.length() == 0 ? false : pattern.charAt(0) == slash;
if (!beginning) {
this.subPattern = pattern;
} else {
this.subPattern = pattern.substring(1);
}
}
@Override
public boolean matches(String path, boolean assumeDirectory,
boolean pathMatch) {
// A NameMatcher's pattern does not contain a slash.
int start = 0;
int stop = path.length();
if (stop > 0 && path.charAt(0) == slash) {
start++;
}
if (pathMatch) {
// Can match only after the last slash
int lastSlash = path.lastIndexOf(slash, stop - 1);
if (lastSlash == stop - 1) {
// Skip trailing slash
lastSlash = path.lastIndexOf(slash, lastSlash - 1);
stop--;
}
boolean match;
if (lastSlash < start) {
match = matches(path, start, stop);
} else {
// Can't match if the path contains a slash if the pattern is
// anchored at the beginning
match = !beginning
&& matches(path, lastSlash + 1, stop);
}
if (match && dirOnly) {
match = assumeDirectory;
}
return match;
}
while (start < stop) {
int end = path.indexOf(slash, start);
if (end < 0) {
end = stop;
}
if (end > start && matches(path, start, end)) {
// make sure the directory matches: either if we are done with
// segment and there is next one, or if the directory is assumed
return !dirOnly || assumeDirectory || end < stop;
}
if (beginning) {
break;
}
start = end + 1;
}
return false;
}
@Override
public boolean matches(String segment, int startIncl, int endExcl) {
// faster local access, same as in string.indexOf()
String s = subPattern;
int length = s.length();
if (length != (endExcl - startIncl)) {
return false;
}
for (int i = 0; i < length; i++) {
char c1 = s.charAt(i);
char c2 = segment.charAt(i + startIncl);
if (c1 != c2) {
return false;
}
}
return true;
}
}
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