Mercurial > hg > truffle
diff src/share/tools/MakeDeps/ArgsParser.java @ 0:a61af66fc99e jdk7-b24
Initial load
author | duke |
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date | Sat, 01 Dec 2007 00:00:00 +0000 |
parents | |
children | c18cbe5936b8 |
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--- /dev/null Thu Jan 01 00:00:00 1970 +0000 +++ b/src/share/tools/MakeDeps/ArgsParser.java Sat Dec 01 00:00:00 2007 +0000 @@ -0,0 +1,85 @@ +/* + * Copyright 2005 Sun Microsystems, Inc. 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 Sun Microsystems, Inc., 4150 Network Circle, Santa Clara, + * CA 95054 USA or visit www.sun.com if you need additional information or + * have any questions. + * + */ + +class ArgIterator { + String[] args; + int i; + ArgIterator(String[] args) { + this.args = args; + this.i = 0; + } + String get() { return args[i]; } + boolean hasMore() { return args != null && i < args.length; } + boolean next() { return ++i < args.length; } +} + +abstract class ArgHandler { + public abstract void handle(ArgIterator it); + +} + +class ArgRule { + String arg; + ArgHandler handler; + ArgRule(String arg, ArgHandler handler) { + this.arg = arg; + this.handler = handler; + } + + boolean process(ArgIterator it) { + if (match(it.get(), arg)) { + handler.handle(it); + return true; + } + return false; + } + boolean match(String rule_pattern, String arg) { + return arg.equals(rule_pattern); + } +} + +class ArgsParser { + ArgsParser(String[] args, + ArgRule[] rules, + ArgHandler defaulter) { + ArgIterator ai = new ArgIterator(args); + while (ai.hasMore()) { + boolean processed = false; + for (int i=0; i<rules.length; i++) { + processed |= rules[i].process(ai); + if (processed) { + break; + } + } + if (!processed) { + if (defaulter != null) { + defaulter.handle(ai); + } else { + System.err.println("ERROR: unparsed \""+ai.get()+"\""); + ai.next(); + } + } + } + } +}