Mercurial > hg > graal-compiler
diff graal/com.oracle.jvmci.options/src/com/oracle/jvmci/options/OptionUtils.java @ 21554:b1530a6cce8c
renamed com.oracle.graal.[debug|options|hotspotvmconfig]* modules to com.oracle.jvmci.[debug|options|hotspotvmconfig]* modules (JBS:GRAAL-53)
author | Doug Simon <doug.simon@oracle.com> |
---|---|
date | Tue, 26 May 2015 23:21:15 +0200 |
parents | graal/com.oracle.graal.options/src/com/oracle/graal/options/OptionUtils.java@8ad82587f08d |
children | 47bebae7454f |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/graal/com.oracle.jvmci.options/src/com/oracle/jvmci/options/OptionUtils.java Tue May 26 23:21:15 2015 +0200 @@ -0,0 +1,257 @@ +/* + * 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. If null, the + * {@link OptionValue#setValue(Object)} method of the specified option is called + * instead. + */ + public static boolean parseOption(SortedMap<String, OptionDescriptor> options, String option, String prefix, OptionConsumer setter) { + if (option.length() == 0) { + return false; + } + + Object value = null; + String optionName = null; + String valueString = null; + + if (option.equals("+PrintFlags")) { + printFlags(options, prefix); + return true; + } + + 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) { + printNoMatchMessage(options, optionName, prefix); + return false; + } + + Class<?> optionType = desc.getType(); + + if (value == null) { + if (optionType == Boolean.TYPE || optionType == Boolean.class) { + System.err.println("Value for boolean option '" + optionName + "' must use '" + prefix + "+" + optionName + "' or '" + prefix + "-" + optionName + "' format"); + return false; + } + + if (valueString == null) { + System.err.println("Value for option '" + optionName + "' must use '" + prefix + optionName + "=<value>' format"); + return false; + } + + 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 { + if (optionType != Boolean.class) { + System.err.println("Value for option '" + optionName + "' must use '" + prefix + optionName + "=<value>' format"); + return false; + } + } + + if (value != null) { + if (setter != null) { + setter.set(desc, value); + } else { + OptionValue<?> optionValue = desc.getOptionValue(); + optionValue.setValue(value); + // System.err.println("Set option " + desc.getName() + " to " + value); + } + } else { + System.err.println("Wrong value \"" + valueString + "\" for option " + optionName); + return false; + } + + return true; + } + + 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; + } + + public static void printNoMatchMessage(SortedMap<String, OptionDescriptor> options, String optionName, String prefix) { + OptionDescriptor desc = options.get(optionName); + if (desc != null) { + if (desc.getType() == Boolean.class) { + System.err.println("Boolean option " + optionName + " must be prefixed with '+' or '-'"); + } else { + System.err.println(desc.getType().getSimpleName() + " option " + optionName + " must not be prefixed with '+' or '-'"); + } + } else { + System.err.println("Could not find option " + optionName + " (use " + prefix + "+PrintFlags to see options)"); + List<OptionDescriptor> matches = fuzzyMatch(options, optionName); + if (!matches.isEmpty()) { + System.err.println("Did you mean one of the following?"); + for (OptionDescriptor match : matches) { + boolean isBoolean = match.getType() == Boolean.class; + System.err.println(String.format(" %s%s%s", isBoolean ? "(+/-)" : "", match.getName(), isBoolean ? "" : "=<value>")); + } + } + } + } + + /** + * 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); + } + + /** + * Compute string similarity based on Dice's coefficient. + * + * Ported from str_similar() in globals.cpp. + */ + static float stringSimiliarity(String str1, String str2) { + int hit = 0; + for (int i = 0; i < str1.length() - 1; ++i) { + for (int j = 0; j < str2.length() - 1; ++j) { + if ((str1.charAt(i) == str2.charAt(j)) && (str1.charAt(i + 1) == str2.charAt(j + 1))) { + ++hit; + break; + } + } + } + return 2.0f * hit / (str1.length() + str2.length()); + } + + private static final float FUZZY_MATCH_THRESHOLD = 0.7F; + + /** + * Returns the set of options that fuzzy match a given option name. + */ + private static List<OptionDescriptor> fuzzyMatch(SortedMap<String, OptionDescriptor> options, String optionName) { + List<OptionDescriptor> matches = new ArrayList<>(); + for (Map.Entry<String, OptionDescriptor> e : options.entrySet()) { + float score = stringSimiliarity(e.getKey(), optionName); + if (score >= FUZZY_MATCH_THRESHOLD) { + matches.add(e.getValue()); + } + } + return matches; + } +}