| /* |
| * Copyright (c) 2016, Oracle and/or its affiliates. All rights reserved. |
| * DO NOT ALTER OR REMOVE COPYRIGHT NOTICES OR THIS FILE HEADER. |
| * |
| * This code is free software; you can redistribute it and/or modify it |
| * under the terms of the GNU General Public License version 2 only, as |
| * published by the Free Software Foundation. |
| * |
| * This code is distributed in the hope that it will be useful, but WITHOUT |
| * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or |
| * FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License |
| * version 2 for more details (a copy is included in the LICENSE file that |
| * accompanied this code). |
| * |
| * You should have received a copy of the GNU General Public License version |
| * 2 along with this work; if not, write to the Free Software Foundation, |
| * Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301 USA. |
| * |
| * Please contact Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA |
| * or visit www.oracle.com if you need additional information or have any |
| * questions. |
| */ |
| |
| |
| package org.graalvm.compiler.debug; |
| |
| import java.io.File; |
| import java.io.IOException; |
| import java.nio.file.FileAlreadyExistsException; |
| import java.nio.file.Files; |
| import java.nio.file.InvalidPathException; |
| import java.nio.file.Path; |
| import java.nio.file.Paths; |
| |
| import org.graalvm.compiler.options.OptionKey; |
| import org.graalvm.compiler.options.OptionValues; |
| |
| /** |
| * Miscellaneous methods for modifying and generating file system paths. |
| */ |
| public class PathUtilities { |
| |
| /** |
| * Gets a value based on {@code name} that can be passed to {@link Paths#get(String, String...)} |
| * without causing an {@link InvalidPathException}. |
| * |
| * @return {@code name} with all characters invalid for the current file system replaced by |
| * {@code '_'} |
| */ |
| public static String sanitizeFileName(String name) { |
| try { |
| Path path = Paths.get(name); |
| if (path.getNameCount() == 0) { |
| return name; |
| } |
| } catch (InvalidPathException e) { |
| // fall through |
| } |
| StringBuilder buf = new StringBuilder(name.length()); |
| for (int i = 0; i < name.length(); i++) { |
| char c = name.charAt(i); |
| if (c != File.separatorChar && c != ' ' && !Character.isISOControl(c)) { |
| try { |
| Paths.get(String.valueOf(c)); |
| buf.append(c); |
| continue; |
| } catch (InvalidPathException e) { |
| } |
| } |
| buf.append('_'); |
| } |
| return buf.toString(); |
| } |
| |
| /** |
| * A maximum file name length supported by most file systems. There is no platform independent |
| * way to get this in Java. Normally it is 255. But for AUFS it is 242. Refer AUFS_MAX_NAMELEN |
| * in http://aufs.sourceforge.net/aufs3/man.html. |
| */ |
| private static final int MAX_FILE_NAME_LENGTH = 242; |
| |
| private static final String ELLIPSIS = "..."; |
| |
| static Path createUnique(OptionValues options, OptionKey<String> baseNameOption, String id, String label, String ext, boolean createDirectory) throws IOException { |
| String uniqueTag = ""; |
| int dumpCounter = 1; |
| String prefix; |
| if (id == null) { |
| prefix = baseNameOption.getValue(options); |
| int slash = prefix.lastIndexOf(File.separatorChar); |
| prefix = prefix.substring(slash + 1); |
| } else { |
| prefix = id; |
| } |
| for (;;) { |
| int fileNameLengthWithoutLabel = uniqueTag.length() + ext.length() + prefix.length() + "[]".length(); |
| int labelLengthLimit = MAX_FILE_NAME_LENGTH - fileNameLengthWithoutLabel; |
| String fileName; |
| if (labelLengthLimit < ELLIPSIS.length()) { |
| // This means `id` is very long |
| String suffix = uniqueTag + ext; |
| int idLengthLimit = Math.min(MAX_FILE_NAME_LENGTH - suffix.length(), prefix.length()); |
| fileName = sanitizeFileName(prefix.substring(0, idLengthLimit) + suffix); |
| } else { |
| if (label == null) { |
| fileName = sanitizeFileName(prefix + uniqueTag + ext); |
| } else { |
| String adjustedLabel = label; |
| if (label.length() > labelLengthLimit) { |
| adjustedLabel = label.substring(0, labelLengthLimit - ELLIPSIS.length()) + ELLIPSIS; |
| } |
| fileName = sanitizeFileName(prefix + '[' + adjustedLabel + ']' + uniqueTag + ext); |
| } |
| } |
| Path dumpDir = DebugOptions.getDumpDirectory(options); |
| Path result = Paths.get(dumpDir.toString(), fileName); |
| try { |
| if (createDirectory) { |
| return Files.createDirectory(result); |
| } else { |
| return Files.createFile(result); |
| } |
| } catch (FileAlreadyExistsException e) { |
| uniqueTag = "_" + dumpCounter++; |
| } |
| } |
| } |
| |
| } |