Start line:  
End line:  

Snippet Preview

Snippet HTML Code

Stack Overflow Questions
BEGIN LICENSE BLOCK ***** Version: EPL 1.0/GPL 2.0/LGPL 2.1 The contents of this file are subject to the Eclipse Public License Version 1.0 (the "License"); you may not use this file except in compliance with the License. You may obtain a copy of the License at http://www.eclipse.org/legal/epl-v10.html Software distributed under the License is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY KIND, either express or implied. See the License for the specific language governing rights and limitations under the License. Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de> Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr> Copyright (C) 2004 Anders Bengtsson <ndrsbngtssn@yahoo.se> Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de> Copyright (C) 2005 Charles O Nutter <headius@headius.com> Copyright (C) 2006 Miguel Covarrubias <mlcovarrubias@gmail.com> Copyright (C) 2006 Thomas E Enebo <enebo@acm.org> Alternatively, the contents of this file may be used under the terms of either of the GNU General Public License Version 2 or later (the "GPL"), or the GNU Lesser General Public License Version 2.1 or later (the "LGPL"), in which case the provisions of the GPL or the LGPL are applicable instead of those above. If you wish to allow use of your version of this file only under the terms of either the GPL or the LGPL, and not to allow others to use your version of this file under the terms of the EPL, indicate your decision by deleting the provisions above and replace them with the notice and other provisions required by the GPL or the LGPL. If you do not delete the provisions above, a recipient may use your version of this file under the terms of any one of the EPL, the GPL or the LGPL. END LICENSE BLOCK ***
 
 package org.jruby;
 
 import static org.jruby.runtime.Helpers.invokedynamic;
 import static org.jruby.runtime.invokedynamic.MethodNames.OP_CMP;

Implementation of the Comparable module.
 
 @JRubyModule(name="Comparable")
 public class RubyComparable {
     public static RubyModule createComparable(Ruby runtime) {
         RubyModule comparableModule = runtime.defineModule("Comparable");
         runtime.setComparable(comparableModule);
         
         comparableModule.defineAnnotatedMethods(RubyComparable.class);
 
         return comparableModule;
     }
 
     /*  ================
      *  Utility Methods
      *  ================ 
      */

    
rb_cmpint
 
     public static int cmpint(ThreadContext contextIRubyObject valIRubyObject aIRubyObject b) {
         if (val.isNil()) cmperr(ab);
         if (val instanceof RubyFixnumreturn RubyNumeric.fix2int((RubyFixnumval);
         if (val instanceof RubyBignumreturn ((RubyBignumval).getValue().signum() == -1 ? -1 : 1;
 
         RubyFixnum zero = RubyFixnum.zero(context.runtime);
         
         if (val.callMethod(context">"zero).isTrue()) return 1;
         if (val.callMethod(context"<"zero).isTrue()) return -1;
 
         return 0;
     }

    
rb_cmperr
 
     public static IRubyObject cmperr(IRubyObject recvIRubyObject other) {
         IRubyObject target;
         if (other.isImmediate() || !(other.isNil() || other.isTrue() || other == recv.getRuntime().getFalse())) {
             target = other.inspect();
         } else {
             target = other.getType();
         }
 
         throw recv.getRuntime().newArgumentError("comparison of " + recv.getType() + " with " + target + " failed");
     }
 
     /*  ================
      *  Module Methods
      *  ================ 
      */

    
cmp_equal (cmp_eq inlined here)
    @JRubyMethod(name = "==", required = 1, compat = .)
    public static IRubyObject op_equal(ThreadContext contextIRubyObject recvIRubyObject other) {
        return callCmpMethod(contextrecvothercontext.runtime.getNil());
    }
    @JRubyMethod(name = "==", required = 1, compat = .)
    public static IRubyObject op_equal19(ThreadContext contextIRubyObject recvIRubyObject other) {
        return callCmpMethod(contextrecvothercontext.runtime.getFalse());
    }
    private static IRubyObject callCmpMethod(ThreadContext contextIRubyObject recvIRubyObject otherIRubyObject returnValueOnError) {
        Ruby runtime = context.runtime;
        
        if (recv == otherreturn runtime.getTrue();
        try {
            IRubyObject result = invokedynamic(contextrecvother);
            // This is only to prevent throwing exceptions by cmperr - it has poor performance
            if (result.isNil()) {
                return returnValueOnError;
            }
            return RubyBoolean.newBoolean(runtimecmpint(contextresultrecvother) == 0);
        } catch (RaiseException e) {
            if (e.getException().kind_of_p(contextruntime.getStandardError()).isTrue()) {
                // clear error info resulting from failure to compare (JRUBY-3292)
                context.setErrorInfo(runtime.getNil());
                return returnValueOnError;
            } else {
                throw e;
            }
        }
    }

    
cmp_gt
    // <=> may return nil in many circumstances, e.g. 3 <=> NaN        
    @JRubyMethod(name = ">", required = 1)
    public static RubyBoolean op_gt(ThreadContext contextIRubyObject recvIRubyObject other) {
        IRubyObject result = invokedynamic(contextrecvother);
        
        if (result.isNil()) cmperr(recvother);
        return RubyBoolean.newBoolean(context.runtimecmpint(contextresultrecvother) > 0);
    }

    
cmp_ge
    @JRubyMethod(name = ">=", required = 1)
    public static RubyBoolean op_ge(ThreadContext contextIRubyObject recvIRubyObject other) {
        IRubyObject result = invokedynamic(contextrecvother);
        
        if (result.isNil()) cmperr(recvother);
        return RubyBoolean.newBoolean(context.runtimecmpint(contextresultrecvother) >= 0);
    }

    
cmp_lt
    @JRubyMethod(name = "<", required = 1)
    public static RubyBoolean op_lt(ThreadContext contextIRubyObject recvIRubyObject other) {
        IRubyObject result = invokedynamic(contextrecvother);
        if (result.isNil()) cmperr(recvother);
        return RubyBoolean.newBoolean(context.runtimecmpint(contextresultrecvother) < 0);
    }

    
cmp_le
    @JRubyMethod(name = "<=", required = 1)
    public static RubyBoolean op_le(ThreadContext contextIRubyObject recvIRubyObject other) {
        IRubyObject result = invokedynamic(contextrecvother);
        if (result.isNil()) cmperr(recvother);
        return RubyBoolean.newBoolean(context.runtimecmpint(contextresultrecvother) <= 0);
    }

    
cmp_between
    @JRubyMethod(name = "between?", required = 2)
    public static RubyBoolean between_p(ThreadContext contextIRubyObject recvIRubyObject firstIRubyObject second) {
        return context.runtime.newBoolean(op_lt(contextrecvfirst).isFalse() && op_gt(contextrecvsecond).isFalse());
    }
New to GrepCode? Check out our FAQ X