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- /*
- * Copyright (c) 2006-2015 DMDirc Developers
- *
- * Permission is hereby granted, free of charge, to any person obtaining a copy
- * of this software and associated documentation files (the "Software"), to deal
- * in the Software without restriction, including without limitation the rights
- * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
- * copies of the Software, and to permit persons to whom the Software is
- * furnished to do so, subject to the following conditions:
- *
- * The above copyright notice and this permission notice shall be included in
- * all copies or substantial portions of the Software.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
- * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
- * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
- * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
- * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
- * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
- * SOFTWARE.
- */
-
- package com.dmdirc.addons.calc;
-
- import com.dmdirc.FrameContainer;
- import com.dmdirc.commandparser.BaseCommandInfo;
- import com.dmdirc.commandparser.CommandArguments;
- import com.dmdirc.commandparser.CommandInfo;
- import com.dmdirc.commandparser.CommandType;
- import com.dmdirc.commandparser.commands.Command;
- import com.dmdirc.commandparser.commands.context.CommandContext;
- import com.dmdirc.interfaces.CommandController;
-
- import java.text.ParseException;
-
- import javax.annotation.Nonnull;
- import javax.inject.Inject;
-
- /**
- * A command which allows users to evaluate various mathematical expressions, and perform basic
- * calculations.
- */
- public class CalcCommand extends Command {
-
- /** A command info object for this command. */
- public static final CommandInfo INFO = new BaseCommandInfo("calc",
- "calc [--showexpr] <expr> - evaluate mathematical expression",
- CommandType.TYPE_GLOBAL);
-
- /**
- * Creates a new instance of this command.
- *
- * @param controller The controller to use for command information.
- */
- @Inject
- public CalcCommand(final CommandController controller) {
- super(controller);
- }
-
- @Override
- public void execute(@Nonnull final FrameContainer origin,
- final CommandArguments args, final CommandContext context) {
- try {
- int offset = 0;
- boolean showexpr = false;
-
- if (args.getArguments().length > 0 && args.getArguments()[0]
- .equals("--showexpr")) {
- showexpr = true;
- offset++;
- }
-
- final String input = args.getArgumentsAsString(offset);
- final Lexer lexer = new Lexer(input);
- final Parser parser = new Parser(lexer);
- final Evaluator evaluator = new Evaluator(parser.parse());
- final Number result = evaluator.evaluate();
- sendLine(origin, args.isSilent(), FORMAT_OUTPUT,
- (showexpr ? input + " = " : "") + result);
- } catch (ParseException ex) {
- sendLine(origin, args.isSilent(), FORMAT_ERROR,
- "Unable to parse expression: " + ex.getMessage());
- } catch (ArithmeticException ex) {
- sendLine(origin, args.isSilent(), FORMAT_ERROR,
- "Unable to calculate expression: " + ex.getMessage());
- }
- }
-
- }
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