RubyFixnum.java
/*
***** 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 Alan Moore <alan_moore@gmx.net>
* Copyright (C) 2001-2004 Jan Arne Petersen <jpetersen@uni-bonn.de>
* Copyright (C) 2002 Benoit Cerrina <b.cerrina@wanadoo.fr>
* Copyright (C) 2002-2004 Anders Bengtsson <ndrsbngtssn@yahoo.se>
* Copyright (C) 2002-2006 Thomas E Enebo <enebo@acm.org>
* Copyright (C) 2004 Stefan Matthias Aust <sma@3plus4.de>
* Copyright (C) 2005 David Corbin <dcorbin@users.sourceforge.net>
* Copyright (C) 2006 Antti Karanta <antti.karanta@napa.fi>
* Copyright (C) 2007 Miguel Covarrubias <mlcovarrubias@gmail.com>
*
* 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 org.jcodings.specific.USASCIIEncoding;
import org.jruby.anno.JRubyClass;
import org.jruby.anno.JRubyMethod;
import org.jruby.compiler.Constantizable;
import org.jruby.runtime.Arity;
import org.jruby.runtime.Block;
import org.jruby.runtime.BlockBody;
import org.jruby.runtime.ClassIndex;
import org.jruby.runtime.Helpers;
import org.jruby.runtime.ObjectAllocator;
import org.jruby.runtime.ThreadContext;
import org.jruby.runtime.builtin.IRubyObject;
import org.jruby.runtime.marshal.UnmarshalStream;
import org.jruby.runtime.opto.OptoFactory;
import org.jruby.util.ByteList;
import org.jruby.util.ConvertBytes;
import org.jruby.util.Numeric;
import org.jruby.util.TypeCoercer;
import java.math.BigInteger;
import java.util.HashMap;
import java.util.Map;
/**
* Implementation of the Fixnum class.
*/
@JRubyClass(name="Fixnum", parent="Integer", include="Precision")
public class RubyFixnum extends RubyInteger implements Constantizable {
public static RubyClass createFixnumClass(Ruby runtime) {
RubyClass fixnum = runtime.defineClass("Fixnum", runtime.getInteger(),
ObjectAllocator.NOT_ALLOCATABLE_ALLOCATOR);
runtime.setFixnum(fixnum);
fixnum.setClassIndex(ClassIndex.FIXNUM);
fixnum.setReifiedClass(RubyFixnum.class);
fixnum.kindOf = new RubyModule.JavaClassKindOf(RubyFixnum.class);
fixnum.defineAnnotatedMethods(RubyFixnum.class);
for (int i = 0; i < runtime.fixnumCache.length; i++) {
runtime.fixnumCache[i] = new RubyFixnum(fixnum, i - CACHE_OFFSET);
}
return fixnum;
}
private final long value;
private static final int BIT_SIZE = 64;
public static final long SIGN_BIT = (1L << (BIT_SIZE - 1));
public static final long MAX = (1L<<(BIT_SIZE - 1)) - 1;
public static final long MIN = -1 * MAX - 1;
public static final long MAX_MARSHAL_FIXNUM = (1L << 30) - 1; // 0x3fff_ffff
public static final long MIN_MARSHAL_FIXNUM = - (1L << 30); // -0x4000_0000
public static final int CACHE_OFFSET = 256;
private static IRubyObject fixCoerce(IRubyObject x) {
do {
x = x.convertToInteger();
} while (!(x instanceof RubyFixnum) && !(x instanceof RubyBignum));
return x;
}
private IRubyObject bitCoerce(ThreadContext context, IRubyObject y) {
if(!(y instanceof RubyFixnum || y instanceof RubyBignum)) {
RubyArray ary = doCoerce(context, y, true);
y = ary.last();
if(!(y instanceof RubyFixnum || y instanceof RubyBignum)) {
coerceFailed(context, y);
}
}
return y;
}
public RubyFixnum(Ruby runtime) {
this(runtime, 0);
}
public RubyFixnum(Ruby runtime, long value) {
super(runtime.getFixnum());
this.value = value;
this.flags |= FROZEN_F;
}
private RubyFixnum(RubyClass klazz, long value) {
super(klazz);
this.value = value;
this.flags |= FROZEN_F;
}
@Override
public ClassIndex getNativeClassIndex() {
return ClassIndex.FIXNUM;
}
/**
* @see org.jruby.compiler.Constantizable
*/
@Override
public Object constant() {
Object constant = null;
long value = this.value;
if (value < CACHE_OFFSET && value >= -CACHE_OFFSET) {
Object[] fixnumConstants = getRuntime().fixnumConstants;
constant = fixnumConstants[(int) value + CACHE_OFFSET];
if (constant == null) {
constant = OptoFactory.newConstantWrapper(IRubyObject.class, this);
fixnumConstants[(int) value + CACHE_OFFSET] = constant;
}
}
return constant;
}
/**
* short circuit for Fixnum key comparison
*/
@Override
public final boolean eql(IRubyObject other) {
return other instanceof RubyFixnum && value == ((RubyFixnum)other).value;
}
@Override
public IRubyObject equal_p(ThreadContext context, IRubyObject obj) {
return equal_p19(context, obj);
}
@Override
public IRubyObject equal_p19(ThreadContext context, IRubyObject obj) {
return context.runtime.newBoolean(this == obj || eql(obj));
}
@Override
public boolean isImmediate() {
return true;
}
@Override
public RubyClass getSingletonClass() {
throw getRuntime().newTypeError("can't define singleton");
}
@Override
public Class<?> getJavaClass() {
return long.class;
}
@Override
public double getDoubleValue() {
return value;
}
@Override
public long getLongValue() {
return value;
}
@Override
public int getIntValue() { return (int)value; }
@Override
public BigInteger getBigIntegerValue() {
return BigInteger.valueOf(value);
}
public static RubyFixnum newFixnum(Ruby runtime, long value) {
if (isInCacheRange(value)) {
return runtime.fixnumCache[(int) value + CACHE_OFFSET];
}
return new RubyFixnum(runtime, value);
}
private static boolean isInCacheRange(long value) {
return value <= CACHE_OFFSET - 1 && value >= -CACHE_OFFSET;
}
public RubyFixnum newFixnum(long newValue) {
return newFixnum(getRuntime(), newValue);
}
public static RubyFixnum zero(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET];
}
public static RubyFixnum one(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET + 1];
}
public static RubyFixnum two(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET + 2];
}
public static RubyFixnum three(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET + 3];
}
public static RubyFixnum four(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET + 4];
}
public static RubyFixnum five(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET + 5];
}
public static RubyFixnum minus_one(Ruby runtime) {
return runtime.fixnumCache[CACHE_OFFSET - 1];
}
@Override
public RubyFixnum hash() {
return newFixnum(hashCode());
}
@Override
public final int hashCode() {
return (int)(value ^ value >>> 32);
}
@Override
public boolean equals(Object other) {
if (other == this) {
return true;
}
if (other instanceof RubyFixnum) {
RubyFixnum num = (RubyFixnum)other;
if (num.value == value) {
return true;
}
}
return false;
}
/* ================
* Instance Methods
* ================
*/
@Override
@JRubyMethod
public IRubyObject times(ThreadContext context, Block block) {
if (block.isGiven()) {
Ruby runtime = context.runtime;
long lvalue = this.value;
boolean checkArity = block.type.checkArity;
if (block.getBody().getArgumentType() == BlockBody.ZERO_ARGS ||
block.arity() == Arity.NO_ARGUMENTS) {
if (checkArity) {
// must pass arg
IRubyObject nil = runtime.getNil();
for (long i = 0; i < lvalue; i++) {
block.yieldSpecific(context, nil);
}
} else {
// no arg needed
for (long i = 0; i < lvalue; i++) {
block.yieldSpecific(context);
}
}
} else {
for (long i = 0; i < lvalue; i++) {
block.yield(context, RubyFixnum.newFixnum(runtime, i));
}
}
return this;
} else {
return RubyEnumerator.enumeratorizeWithSize(context, this, "times", timesSizeFn(context.runtime));
}
}
/** fix_to_s
*
*/
public RubyString to_s(IRubyObject[] args) {
switch (args.length) {
case 0: return to_s();
case 1: return to_s(args[0]);
default: throw getRuntime().newArgumentError(args.length, 1);
}
}
@JRubyMethod
@Override
public RubyString to_s() {
ByteList bl = ConvertBytes.longToByteList(value, 10);
RubyString str = getRuntime().newString(bl);
str.setEncoding(USASCIIEncoding.INSTANCE);
return str;
}
@JRubyMethod
public RubyString to_s(IRubyObject arg0) {
int base = num2int(arg0);
if (base < 2 || base > 36) {
throw getRuntime().newArgumentError("illegal radix " + base);
}
ByteList bl = ConvertBytes.longToByteList(value, base);
bl.setEncoding(USASCIIEncoding.INSTANCE);
return getRuntime().newString(bl);
}
/** fix_id2name
*
*/
@JRubyMethod
public IRubyObject id2name() {
RubySymbol symbol = RubySymbol.getSymbolLong(getRuntime(), value);
if (symbol != null) return getRuntime().newString(symbol.asJavaString());
return getRuntime().getNil();
}
/** fix_to_sym
*
*/
@Deprecated
public IRubyObject to_sym() {
RubySymbol symbol = RubySymbol.getSymbolLong(getRuntime(), value);
return symbol != null ? symbol : getRuntime().getNil();
}
/** fix_uminus
*
*/
@JRubyMethod(name = "-@")
public IRubyObject op_uminus() {
if (value == MIN) { // a gotcha
return RubyBignum.newBignum(getRuntime(), BigInteger.valueOf(value).negate());
}
return RubyFixnum.newFixnum(getRuntime(), -value);
}
/** fix_plus
*
*/
@JRubyMethod(name = "+")
public IRubyObject op_plus(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return addFixnum(context, (RubyFixnum)other);
}
return addOther(context, other);
}
public IRubyObject op_plus(ThreadContext context, long otherValue) {
long result = value + otherValue;
if (Helpers.additionOverflowed(value, otherValue, result)) {
return addAsBignum(context, otherValue);
}
return newFixnum(context.runtime, result);
}
public IRubyObject op_plus_one(ThreadContext context) {
long result = value + 1;
if (result == Long.MIN_VALUE) {
return addAsBignum(context, 1);
}
return newFixnum(context.runtime, result);
}
public IRubyObject op_plus_two(ThreadContext context) {
long result = value + 2;
//- if (result == Long.MIN_VALUE + 1) { //-code
if (result < value) { //+code+patch; maybe use if (result <= value) {
return addAsBignum(context, 2);
}
return newFixnum(context.runtime, result);
}
private IRubyObject addFixnum(ThreadContext context, RubyFixnum other) {
long otherValue = other.value;
long result = value + otherValue;
if (Helpers.additionOverflowed(value, otherValue, result)) {
return addAsBignum(context, other);
}
return newFixnum(context.runtime, result);
}
private IRubyObject addAsBignum(ThreadContext context, RubyFixnum other) {
return RubyBignum.newBignum(context.runtime, value).op_plus(context, other);
}
private IRubyObject addAsBignum(ThreadContext context, long other) {
return RubyBignum.newBignum(context.runtime, value).op_plus(context, other);
}
private IRubyObject addOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return ((RubyBignum) other).op_plus(context, this);
}
if (other instanceof RubyFloat) {
return context.runtime.newFloat((double) value + ((RubyFloat) other).getDoubleValue());
}
return coerceBin(context, "+", other);
}
/** fix_minus
*
*/
@JRubyMethod(name = "-")
public IRubyObject op_minus(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return subtractFixnum(context, (RubyFixnum)other);
}
return subtractOther(context, other);
}
public IRubyObject op_minus(ThreadContext context, long otherValue) {
long result = value - otherValue;
if (Helpers.subtractionOverflowed(value, otherValue, result)) {
return subtractAsBignum(context, otherValue);
}
return newFixnum(context.runtime, result);
}
public IRubyObject op_minus_one(ThreadContext context) {
long result = value - 1;
if (result == Long.MAX_VALUE) {
return subtractAsBignum(context, 1);
}
return newFixnum(context.runtime, result);
}
public IRubyObject op_minus_two(ThreadContext context) {
long result = value - 2;
//- if (result == Long.MAX_VALUE - 1) { //-code
if (value < result) { //+code+patch; maybe use if (value <= result) {
return subtractAsBignum(context, 2);
}
return newFixnum(context.runtime, result);
}
private IRubyObject subtractFixnum(ThreadContext context, RubyFixnum other) {
long otherValue = other.value;
long result = value - otherValue;
if (Helpers.subtractionOverflowed(value, otherValue, result)) {
return subtractAsBignum(context, other);
}
return newFixnum(context.runtime, result);
}
private IRubyObject subtractAsBignum(ThreadContext context, RubyFixnum other) {
return RubyBignum.newBignum(context.runtime, value).op_minus(context, other);
}
private IRubyObject subtractAsBignum(ThreadContext context, long other) {
return RubyBignum.newBignum(context.runtime, value).op_minus(context, other);
}
private IRubyObject subtractOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBignum.newBignum(context.runtime, value).op_minus(context, other);
} else if (other instanceof RubyFloat) {
return context.runtime.newFloat((double) value - ((RubyFloat) other).getDoubleValue());
}
return coerceBin(context, "-", other);
}
/** fix_mul
*
*/
@JRubyMethod(name = "*")
public IRubyObject op_mul(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return op_mul(context, ((RubyFixnum)other).value);
} else {
return multiplyOther(context, other);
}
}
private IRubyObject multiplyOther(ThreadContext context, IRubyObject other) {
Ruby runtime = context.runtime;
if (other instanceof RubyBignum) {
return ((RubyBignum) other).op_mul(context, this);
} else if (other instanceof RubyFloat) {
return runtime.newFloat((double) value * ((RubyFloat) other).getDoubleValue());
}
return coerceBin(context, "*", other);
}
public IRubyObject op_mul(ThreadContext context, long otherValue) {
// See JRUBY-6612 for reasons for these different cases.
// The problem is that these Java long calculations overflow:
// value == -1; otherValue == Long.MIN_VALUE;
// result = value * othervalue; #=> Long.MIN_VALUE (overflow)
// result / value #=> Long.MIN_VALUE (overflow) == otherValue
Ruby runtime = context.runtime;
long value = this.value;
// fast check for known ranges that won't overflow
if (value <= 3037000499L && otherValue <= 3037000499L &&
value >= -3037000499L && otherValue >= -3037000499L) {
return newFixnum(runtime, value * otherValue);
}
if (value == 0 || otherValue == 0) {
return RubyFixnum.zero(runtime);
}
if (value == -1) {
if (otherValue != Long.MIN_VALUE) {
return newFixnum(runtime, -otherValue);
}
} else {
long result = value * otherValue;
if (result / value == otherValue) {
return newFixnum(runtime, result);
}
}
// if here (value * otherValue) overflows long, so must return Bignum
return RubyBignum.newBignum(runtime, value).op_mul(context, otherValue);
}
/** fix_div
* here is terrible MRI gotcha:
* 1.div 3.0 -> 0
* 1 / 3.0 -> 0.3333333333333333
*
* MRI is also able to do it in one place by looking at current frame in rb_num_coerce_bin:
* rb_funcall(x, ruby_frame->orig_func, 1, y);
*
* also note that RubyFloat doesn't override Numeric.div
*/
@JRubyMethod(name = "div")
public IRubyObject div_div(ThreadContext context, IRubyObject other) {
checkZeroDivisionError(context, other);
return idiv(context, other, "div");
}
@JRubyMethod(name = "/")
public IRubyObject op_div(ThreadContext context, IRubyObject other) {
return idiv(context, other, "/");
}
public IRubyObject op_div(ThreadContext context, long other) {
return idiv(context, other, "/");
}
@JRubyMethod(name = {"odd?"})
public RubyBoolean odd_p(ThreadContext context) {
if(value%2 != 0) {
return context.runtime.getTrue();
}
return context.runtime.getFalse();
}
@JRubyMethod(name = {"even?"})
public RubyBoolean even_p(ThreadContext context) {
if(value%2 == 0) {
return context.runtime.getTrue();
}
return context.runtime.getFalse();
}
@JRubyMethod
public IRubyObject pred(ThreadContext context) {
return context.runtime.newFixnum(value-1);
}
public IRubyObject idiv(ThreadContext context, IRubyObject other, String method) {
if (other instanceof RubyFixnum) {
return idivLong(context, value, ((RubyFixnum) other).value);
}
return coerceBin(context, method, other);
}
public IRubyObject idiv(ThreadContext context, long y, String method) {
long x = value;
return idivLong(context, x, y);
}
private IRubyObject idivLong(ThreadContext context, long x, long y) {
Ruby runtime = context.runtime;
if (y == 0) {
throw runtime.newZeroDivisionError();
}
long result;
if (y > 0) {
if (x >= 0) {
result = x / y; // x >= 0, y > 0;
} else {
result = (x + 1) / y - 1; // x < 0, y > 0; // OOPS "=" was omitted
}
} else if (x > 0) {
result = (x - 1) / y - 1; // x > 0, y < 0;
} else if (y == -1) {
if (x == MIN) {
return RubyBignum.newBignum(runtime, BigInteger.valueOf(x).negate());
}
result = -x;
} else {
result = x / y; // x <= 0, y < 0;
}
return runtime.newFixnum(result);
}
/** fix_mod
*
*/
@JRubyMethod(name = {"%", "modulo"})
public IRubyObject op_mod(ThreadContext context, IRubyObject other) {
checkZeroDivisionError(context, other);
if (other instanceof RubyFixnum) {
return moduloFixnum(context, (RubyFixnum)other);
}
return coerceBin(context, "%", other);
}
public IRubyObject op_mod(ThreadContext context, long other) {
return moduloFixnum(context, other);
}
private IRubyObject moduloFixnum(ThreadContext context, RubyFixnum other) {
return moduloFixnum(context, other.value);
}
private IRubyObject moduloFixnum(ThreadContext context, long other) {
// Java / and % are not the same as ruby
long x = value;
long y = other;
if (y == 0) {
throw context.runtime.newZeroDivisionError();
}
long mod = x % y;
if (mod < 0 && y > 0 || mod > 0 && y < 0) {
mod += y;
}
return context.runtime.newFixnum(mod);
}
/** fix_divmod
*
*/
@JRubyMethod(name = "divmod")
@Override
public IRubyObject divmod(ThreadContext context, IRubyObject other) {
checkZeroDivisionError(context, other);
if (other instanceof RubyFixnum) {
return divmodFixnum(context, other);
}
return coerceBin(context, "divmod", other);
}
private IRubyObject divmodFixnum(ThreadContext context, IRubyObject other) {
long x = value;
long y = ((RubyFixnum) other).value;
final Ruby runtime = context.runtime;
if (y == 0) {
throw runtime.newZeroDivisionError();
}
long mod;
IRubyObject integerDiv;
if (y == -1) {
if (x == MIN) {
integerDiv = RubyBignum.newBignum(runtime, BigInteger.valueOf(x).negate());
} else {
integerDiv = RubyFixnum.newFixnum(runtime, -x);
}
mod = 0;
} else {
long div = x / y;
// Next line avoids using the slow: mod = x % y,
// and I believe there is no possibility of integer overflow.
mod = x - y * div;
if (mod < 0 && y > 0 || mod > 0 && y < 0) {
div -= 1; // horrible sudden thought: might this overflow? probably not?
mod += y;
}
integerDiv = RubyFixnum.newFixnum(runtime, div);
}
IRubyObject fixMod = RubyFixnum.newFixnum(runtime, mod);
return RubyArray.newArray(runtime, integerDiv, fixMod);
}
/** fix_quo
*
*/
@Deprecated
@Override
public IRubyObject quo(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return RubyFloat.newFloat(context.runtime, (double) value / (double) ((RubyFixnum) other).value);
} else if (other instanceof RubyBignum) {
return RubyFloat.newFloat(context.runtime, (double) value / (double) ((RubyBignum) other).getDoubleValue());
}
return coerceBin(context, "quo", other);
}
/** fix_pow
*
*/
@JRubyMethod(name = "**")
public IRubyObject op_pow(ThreadContext context, IRubyObject other) {
return op_pow_19(context, other);
}
public IRubyObject op_pow(ThreadContext context, long other) {
// FIXME this needs to do the right thing for 1.9 mode before we can use it
throw context.runtime.newRuntimeError("bug: using direct op_pow(long) in 1.8 mode");
}
private IRubyObject powerFixnum(ThreadContext context, long other) {
Ruby runtime = context.runtime;
if (other == 0) {
return RubyFixnum.one(runtime);
}
if (other == 1) {
return this;
}
if (other > 0) {
return RubyBignum.newBignum(runtime, value).op_pow(context, other);
}
return RubyFloat.newFloat(runtime, Math.pow(value, other));
}
private IRubyObject powerOther(ThreadContext context, IRubyObject other) {
Ruby runtime = context.runtime;
if (other instanceof RubyFloat) {
return RubyFloat.newFloat(runtime, Math.pow(value, ((RubyFloat) other)
.getDoubleValue()));
}
return coerceBin(context, "**", other);
}
public IRubyObject op_pow_19(ThreadContext context, IRubyObject other) {
if (other instanceof RubyNumeric) {
double d_other = ((RubyNumeric) other).getDoubleValue();
if (value < 0 && (d_other != Math.round(d_other))) {
return RubyComplex.newComplexRaw(getRuntime(), this).callMethod(context, "**", other);
}
if (other instanceof RubyFixnum) {
return powerFixnum19(context, other);
}
}
return powerOther19(context, other);
}
private IRubyObject powerOther19(ThreadContext context, IRubyObject other) {
Ruby runtime = context.runtime;
long a = value;
if (other instanceof RubyBignum) {
if (other.callMethod(context, "<", RubyFixnum.zero(runtime)).isTrue()) {
return RubyRational.newRationalRaw(runtime, this).callMethod(context, "**", other);
}
if (a == 0) return RubyFixnum.zero(runtime);
if (a == 1) return RubyFixnum.one(runtime);
if (a == -1) {
return ((RubyBignum)other).even_p(context).isTrue() ? RubyFixnum.one(runtime) : RubyFixnum.minus_one(runtime);
}
RubyBignum.newBignum(runtime, RubyBignum.fix2big(this)).op_pow(context, other);
} else if (other instanceof RubyFloat) {
double b = ((RubyFloat)other).getValue();
if (b == 0.0 || a == 1) return runtime.newFloat(1.0);
if (a == 0) return runtime.newFloat(b < 0 ? 1.0 / 0.0 : 0.0);
return RubyFloat.newFloat(runtime, Math.pow(a, b));
}
return coerceBin(context, "**", other);
}
private IRubyObject powerFixnum19(ThreadContext context, IRubyObject other) {
Ruby runtime = context.runtime;
long a = value;
long b = ((RubyFixnum) other).value;
if (b < 0) {
return RubyRational.newRationalRaw(runtime, this).callMethod(context, "**", other);
}
if (b == 0) {
return RubyFixnum.one(runtime);
}
if (b == 1) {
return this;
}
if (a == 0) {
return b > 0 ? RubyFixnum.zero(runtime) : RubyNumeric.dbl2num(runtime, 1.0 / 0.0);
}
if (a == 1) {
return RubyFixnum.one(runtime);
}
if (a == -1) {
return b % 2 == 0 ? RubyFixnum.one(runtime) : RubyFixnum.minus_one(runtime);
}
return Numeric.int_pow(context, a, b);
}
/** fix_abs
*
*/
@JRubyMethod
@Override
public IRubyObject abs(ThreadContext context) {
if (value < 0) {
// A gotcha for Long.MIN_VALUE: value = -value
if (value == Long.MIN_VALUE) {
return RubyBignum.newBignum(
context.runtime, BigInteger.valueOf(value).negate());
}
return RubyFixnum.newFixnum(context.runtime, -value);
}
return this;
}
/** fix_abs/1.9
*
*/
@JRubyMethod(name = "magnitude")
@Override
public IRubyObject magnitude(ThreadContext context) {
return abs(context);
}
/** fix_equal
*
*/
@JRubyMethod(name = "==")
@Override
public IRubyObject op_equal(ThreadContext context, IRubyObject other) {
return other instanceof RubyFixnum ?
op_equal(context, ((RubyFixnum) other).value) : op_equalOther(context, other);
}
public IRubyObject op_equal(ThreadContext context, long other) {
return RubyBoolean.newBoolean(context.runtime, value == other);
}
public boolean op_equal_boolean(ThreadContext context, long other) {
return value == other;
}
public boolean fastEqual(RubyFixnum other) {
return value == other.value;
}
private IRubyObject op_equalOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBoolean.newBoolean(context.runtime,
BigInteger.valueOf(value).compareTo(((RubyBignum) other).getValue()) == 0);
}
if (other instanceof RubyFloat) {
return RubyBoolean.newBoolean(context.runtime, (double) value == ((RubyFloat) other).getDoubleValue());
}
return super.op_num_equal(context, other);
}
@Override
public final int compareTo(IRubyObject other) {
if (other instanceof RubyFixnum) {
long otherValue = ((RubyFixnum)other).value;
return value == otherValue ? 0 : value > otherValue ? 1 : -1;
}
return compareToOther(other);
}
private int compareToOther(IRubyObject other) {
if (other instanceof RubyBignum) return BigInteger.valueOf(value).compareTo(((RubyBignum)other).getValue());
if (other instanceof RubyFloat) return Double.compare((double)value, ((RubyFloat)other).getDoubleValue());
return (int)coerceCmp(getRuntime().getCurrentContext(), "<=>", other).convertToInteger().getLongValue();
}
/** fix_cmp
*
*/
@JRubyMethod(name = "<=>")
public IRubyObject op_cmp(ThreadContext context, IRubyObject other) {
return other instanceof RubyFixnum ?
op_cmp(context, ((RubyFixnum)other).value) : compareOther(context, other);
}
public IRubyObject op_cmp(ThreadContext context, long other) {
Ruby runtime = context.runtime;
return value == other ? RubyFixnum.zero(runtime) : value > other ?
RubyFixnum.one(runtime) : RubyFixnum.minus_one(runtime);
}
private IRubyObject compareOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return newFixnum(context.runtime, BigInteger.valueOf(value).compareTo(((RubyBignum)other).getValue()));
}
if (other instanceof RubyFloat) {
return dbl_cmp(context.runtime, (double)value, ((RubyFloat)other).getDoubleValue());
}
return coerceCmp(context, "<=>", other);
}
/** fix_gt
*
*/
@JRubyMethod(name = ">")
public IRubyObject op_gt(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return RubyBoolean.newBoolean(context.runtime, value > ((RubyFixnum) other).value);
}
return op_gtOther(context, other);
}
public IRubyObject op_gt(ThreadContext context, long other) {
return RubyBoolean.newBoolean(context.runtime, value > other);
}
public boolean op_gt_boolean(ThreadContext context, long other) {
return value > other;
}
private IRubyObject op_gtOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBoolean.newBoolean(context.runtime,
BigInteger.valueOf(value).compareTo(((RubyBignum) other).getValue()) > 0);
}
if (other instanceof RubyFloat) {
return RubyBoolean.newBoolean(context.runtime, (double) value > ((RubyFloat) other).getDoubleValue());
}
return coerceRelOp(context, ">", other);
}
/** fix_ge
*
*/
@JRubyMethod(name = ">=")
public IRubyObject op_ge(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return RubyBoolean.newBoolean(context.runtime, value >= ((RubyFixnum) other).value);
}
return op_geOther(context, other);
}
public IRubyObject op_ge(ThreadContext context, long other) {
return RubyBoolean.newBoolean(context.runtime, value >= other);
}
public boolean op_ge_boolean(ThreadContext context, long other) {
return value >= other;
}
private IRubyObject op_geOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBoolean.newBoolean(context.runtime,
BigInteger.valueOf(value).compareTo(((RubyBignum) other).getValue()) >= 0);
}
if (other instanceof RubyFloat) {
return RubyBoolean.newBoolean(context.runtime, (double) value >= ((RubyFloat) other).getDoubleValue());
}
return coerceRelOp(context, ">=", other);
}
/** fix_lt
*
*/
@JRubyMethod(name = "<")
public IRubyObject op_lt(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return op_lt(context, ((RubyFixnum)other).value);
}
return op_ltOther(context, other);
}
public IRubyObject op_lt(ThreadContext context, long other) {
return RubyBoolean.newBoolean(context.runtime, value < other);
}
public boolean op_lt_boolean(ThreadContext context, long other) {
return value < other;
}
private IRubyObject op_ltOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBoolean.newBoolean(context.runtime,
BigInteger.valueOf(value).compareTo(((RubyBignum) other).getValue()) < 0);
}
if (other instanceof RubyFloat) {
return RubyBoolean.newBoolean(context.runtime, (double) value < ((RubyFloat) other).getDoubleValue());
}
return coerceRelOp(context, "<", other);
}
/** fix_le
*
*/
@JRubyMethod(name = "<=")
public IRubyObject op_le(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum) {
return RubyBoolean.newBoolean(context.runtime, value <= ((RubyFixnum) other).value);
}
return op_leOther(context, other);
}
public IRubyObject op_le(ThreadContext context, long other) {
return RubyBoolean.newBoolean(context.runtime, value <= other);
}
public boolean op_le_boolean(ThreadContext context, long other) {
return value <= other;
}
private IRubyObject op_leOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyBignum) {
return RubyBoolean.newBoolean(context.runtime,
BigInteger.valueOf(value).compareTo(((RubyBignum) other).getValue()) <= 0);
}
if (other instanceof RubyFloat) {
return RubyBoolean.newBoolean(context.runtime, (double) value <= ((RubyFloat) other).getDoubleValue());
}
return coerceRelOp(context, "<=", other);
}
/** fix_rev
*
*/
@JRubyMethod(name = "~")
public IRubyObject op_neg() {
return newFixnum(~value);
}
/** fix_and
*
*/
@JRubyMethod(name = "&")
public IRubyObject op_and(ThreadContext context, IRubyObject other) {
return op_and19(context, other);
}
private IRubyObject op_andOther(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum || (other = fixCoerce(other)) instanceof RubyFixnum) {
return newFixnum(context.runtime, value & ((RubyFixnum) other).value);
}
return ((RubyBignum) other).op_and(context, this);
}
public IRubyObject op_and(ThreadContext context, long other) {
return newFixnum(context.runtime, value & other);
}
private IRubyObject op_and19(ThreadContext context, IRubyObject other) {
if (!((other = bitCoerce(context, other)) instanceof RubyFixnum)) {
return ((RubyBignum) other).op_and(context, this);
}
return op_andOther(context, other);
}
/** fix_or
*
*/
@JRubyMethod(name = "|")
public IRubyObject op_or(ThreadContext context, IRubyObject other) {
if ((other = bitCoerce(context, other)) instanceof RubyFixnum) {
return newFixnum(context.runtime, value | ((RubyFixnum) other).value);
}
return ((RubyBignum) other).op_or(context, this);
}
public IRubyObject op_or(ThreadContext context, long other) {
return newFixnum(context.runtime, value | other);
}
/** fix_xor
*
*/
@JRubyMethod(name = "^")
public IRubyObject op_xor(ThreadContext context, IRubyObject other) {
return op_xor19(context, other);
}
private IRubyObject op_xor18(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFixnum || (other = fixCoerce(other)) instanceof RubyFixnum) {
return newFixnum(context.runtime, value ^ ((RubyFixnum) other).value);
}
return ((RubyBignum) other).op_xor(context, this);
}
public IRubyObject op_xor(ThreadContext context, long other) {
return newFixnum(context.runtime, value ^ other);
}
private IRubyObject op_xor19(ThreadContext context, IRubyObject other) {
if (!((other = bitCoerce(context, other)) instanceof RubyFixnum)) {
return ((RubyBignum) other).op_xor(context, this);
}
return op_xor18(context, other);
}
/** fix_aref
*
*/
@JRubyMethod(name = "[]")
public IRubyObject op_aref(IRubyObject other) {
if(!(other instanceof RubyFixnum) && !((other = fixCoerce(other)) instanceof RubyFixnum)) {
RubyBignum big = (RubyBignum) other;
other = RubyBignum.bignorm(getRuntime(), big.getValue());
if (!(other instanceof RubyFixnum)) {
return big.getValue().signum() == 0 || value >= 0 ? RubyFixnum.zero(getRuntime()) : RubyFixnum.one(getRuntime());
}
}
long otherValue = fix2long(other);
if (otherValue < 0) return RubyFixnum.zero(getRuntime());
if (BIT_SIZE - 1 < otherValue) {
return value < 0 ? RubyFixnum.one(getRuntime()) : RubyFixnum.zero(getRuntime());
}
return (value & (1L << otherValue)) == 0 ? RubyFixnum.zero(getRuntime()) : RubyFixnum.one(getRuntime());
}
/** fix_lshift
*
*/
@JRubyMethod(name = "<<")
public IRubyObject op_lshift(IRubyObject other) {
if (!(other instanceof RubyFixnum)) return RubyBignum.newBignum(getRuntime(), value).op_lshift(other);
return op_lshift(((RubyFixnum)other).getLongValue());
}
public IRubyObject op_lshift(long width) {
return width < 0 ? rshift(-width) : lshift(width);
}
private IRubyObject lshift(long width) {
if (width > BIT_SIZE - 1 || ((~0L << BIT_SIZE - width - 1) & value) != 0) {
return RubyBignum.newBignum(getRuntime(), value).op_lshift(RubyFixnum.newFixnum(getRuntime(), width));
}
return RubyFixnum.newFixnum(getRuntime(), value << width);
}
/** fix_rshift
*
*/
@JRubyMethod(name = ">>")
public IRubyObject op_rshift(IRubyObject other) {
if (!(other instanceof RubyFixnum)) return RubyBignum.newBignum(getRuntime(), value).op_rshift(other);
return op_rshift(((RubyFixnum)other).getLongValue());
}
public IRubyObject op_rshift(long width) {
if (width == 0) return this;
return width < 0 ? lshift(-width) : rshift(width);
}
private IRubyObject rshift(long width) {
if (width >= BIT_SIZE - 1) {
return value < 0 ? RubyFixnum.minus_one(getRuntime()) : RubyFixnum.zero(getRuntime());
}
return RubyFixnum.newFixnum(getRuntime(), value >> width);
}
/** fix_to_f
*
*/
@JRubyMethod
public IRubyObject to_f() {
return RubyFloat.newFloat(getRuntime(), (double) value);
}
/** fix_size
*
*/
@JRubyMethod
public IRubyObject size() {
return newFixnum((long) ((BIT_SIZE + 7) / 8));
}
/** fix_zero_p
*
*/
@JRubyMethod(name = "zero?")
public IRubyObject zero_p() {
return RubyBoolean.newBoolean(getRuntime(), value == 0);
}
@JRubyMethod
public IRubyObject succ(ThreadContext context) {
return ((RubyFixnum) this).op_plus_one(context);
}
@Override
public IRubyObject id() {
if (value <= Long.MAX_VALUE / 2 && value >= Long.MIN_VALUE / 2) {
return newFixnum(2 * value + 1);
}
return super.id();
}
@Override
public IRubyObject taint(ThreadContext context) {
return this;
}
// Piece of mri rb_to_id
@Override
public String asJavaString() {
Ruby runtime = getRuntime();
throw runtime.newTypeError(inspect().toString() + " is not a symbol");
}
public static RubyFixnum unmarshalFrom(UnmarshalStream input) throws java.io.IOException {
return input.getRuntime().newFixnum(input.unmarshalInt());
}
/* ================
* Singleton Methods
* ================
*/
/** rb_fix_induced_from
*
*/
@Deprecated
public static IRubyObject induced_from(IRubyObject recv, IRubyObject other) {
return RubyNumeric.num2fix(other);
}
private static final Map<Class, TypeCoercer> JAVA_COERCERS = new HashMap<Class, TypeCoercer>();
static {
TypeCoercer intCoercer = new TypeCoercer() {
public Object coerce(IRubyObject self) {
RubyFixnum fixnum = (RubyFixnum)self;
if (fixnum.value > Integer.MAX_VALUE) {
throw self.getRuntime().newRangeError("Fixnum " + fixnum.value + " is too large for Java int");
}
return Integer.valueOf((int)fixnum.value);
}
};
JAVA_COERCERS.put(int.class, intCoercer);
JAVA_COERCERS.put(Integer.class, intCoercer);
}
private void checkZeroDivisionError(ThreadContext context, IRubyObject other) {
if (other instanceof RubyFloat && ((RubyFloat)other).getDoubleValue() == 0.0d) {
throw context.runtime.newZeroDivisionError();
}
}
@Override
public RubyInteger convertToInteger(String method) {
return this;
}
}