Mercurial > hg > graal-compiler
view graal/com.oracle.jvmci.options/src/com/oracle/jvmci/options/OptionUtils.java @ 21671:8d0c2aabfc2d
missed Graal -> JVMCI renamings
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 02 Jun 2015 19:11:34 +0200 |
parents | 47bebae7454f |
children |
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/* * Copyright (c) 2014, 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 com.oracle.jvmci.options; import java.util.*; public class OptionUtils { public interface OptionConsumer { void set(OptionDescriptor desc, Object value); } /** * Parses a given option value specification. * * @param option the specification of an option and its value * @param setter the object to notify of the parsed option and value. */ public static void parseOption(String option, OptionConsumer setter) { SortedMap<String, OptionDescriptor> options = OptionsLoader.options; Objects.requireNonNull(setter); if (option.length() == 0) { return; } Object value = null; String optionName = null; String valueString = null; char first = option.charAt(0); if (first == '+' || first == '-') { optionName = option.substring(1); value = (first == '+'); } else { int index = option.indexOf('='); if (index == -1) { optionName = option; valueString = null; } else { optionName = option.substring(0, index); valueString = option.substring(index + 1); } } OptionDescriptor desc = options.get(optionName); if (desc == null) { throw new IllegalArgumentException("Option '" + optionName + "' not found"); } Class<?> optionType = desc.getType(); if (value == null) { if (optionType == Boolean.TYPE || optionType == Boolean.class) { throw new IllegalArgumentException("Boolean option '" + optionName + "' must use +/- prefix"); } if (valueString == null) { throw new IllegalArgumentException("Missing value for non-boolean option '" + optionName + "' must use " + optionName + "=<value> format"); } if (optionType == Float.class) { value = Float.parseFloat(valueString); } else if (optionType == Double.class) { value = Double.parseDouble(valueString); } else if (optionType == Integer.class) { value = Integer.valueOf((int) parseLong(valueString)); } else if (optionType == Long.class) { value = Long.valueOf(parseLong(valueString)); } else if (optionType == String.class) { value = valueString; } else { throw new IllegalArgumentException("Wrong value for option '" + optionName + "'"); } } else { if (optionType != Boolean.class) { throw new IllegalArgumentException("Non-boolean option '" + optionName + "' can not use +/- prefix. Use " + optionName + "=<value> format"); } } setter.set(desc, value); } private static long parseLong(String v) { String valueString = v.toLowerCase(); long scale = 1; if (valueString.endsWith("k")) { scale = 1024L; } else if (valueString.endsWith("m")) { scale = 1024L * 1024L; } else if (valueString.endsWith("g")) { scale = 1024L * 1024L * 1024L; } else if (valueString.endsWith("t")) { scale = 1024L * 1024L * 1024L * 1024L; } if (scale != 1) { /* Remove trailing scale character. */ valueString = valueString.substring(0, valueString.length() - 1); } return Long.parseLong(valueString) * scale; } /** * Wraps some given text to one or more lines of a given maximum width. * * @param text text to wrap * @param width maximum width of an output line, exception for words in {@code text} longer than * this value * @return {@code text} broken into lines */ private static List<String> wrap(String text, int width) { List<String> lines = Collections.singletonList(text); if (text.length() > width) { String[] chunks = text.split("\\s+"); lines = new ArrayList<>(); StringBuilder line = new StringBuilder(); for (String chunk : chunks) { if (line.length() + chunk.length() > width) { lines.add(line.toString()); line.setLength(0); } if (line.length() != 0) { line.append(' '); } String[] embeddedLines = chunk.split("%n", -2); if (embeddedLines.length == 1) { line.append(chunk); } else { for (int i = 0; i < embeddedLines.length; i++) { line.append(embeddedLines[i]); if (i < embeddedLines.length - 1) { lines.add(line.toString()); line.setLength(0); } } } } if (line.length() != 0) { lines.add(line.toString()); } } return lines; } public static void printFlags(SortedMap<String, OptionDescriptor> options, String prefix) { System.out.println("[List of " + prefix + " options]"); SortedMap<String, OptionDescriptor> sortedOptions = options; for (Map.Entry<String, OptionDescriptor> e : sortedOptions.entrySet()) { e.getKey(); OptionDescriptor desc = e.getValue(); Object value = desc.getOptionValue().getValue(); List<String> helpLines = wrap(desc.getHelp(), 70); System.out.println(String.format("%9s %-40s = %-14s %s", desc.getType().getSimpleName(), e.getKey(), value, helpLines.get(0))); for (int i = 1; i < helpLines.size(); i++) { System.out.println(String.format("%67s %s", " ", helpLines.get(i))); } } System.exit(0); } }