| /******************************************************************************* |
| * Copyright (c) 2009 Luaj.org. All rights reserved. |
| * |
| * 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 org.luaj.vm3; |
| |
| import org.luaj.vm3.lib.MathLib; |
| |
| /** |
| * Extension of {@link LuaNumber} which can hold a Java int as its value. |
| * <p> |
| * These instance are not instantiated directly by clients, but indirectly |
| * via the static functions {@link LuaValue#valueOf(int)} or {@link LuaValue#valueOf(double)} |
| * functions. This ensures that policies regarding pooling of instances are |
| * encapsulated. |
| * <p> |
| * There are no API's specific to LuaInteger that are useful beyond what is already |
| * exposed in {@link LuaValue}. |
| * |
| * @see LuaValue |
| * @see LuaNumber |
| * @see LuaDouble |
| * @see LuaValue#valueOf(int) |
| * @see LuaValue#valueOf(double) |
| */ |
| public class LuaInteger extends LuaNumber { |
| |
| private static final LuaInteger[] intValues = new LuaInteger[512]; |
| static { |
| for (int i = 0; i < 512; i++) |
| intValues[i] = new LuaInteger(i - 256); |
| } |
| |
| public static LuaInteger valueOf(int i) { |
| return i <= 255 && i >= -256 ? intValues[i + 256] : new LuaInteger(i); |
| }; |
| |
| // TODO consider moving this to LuaValue |
| /** Return a LuaNumber that represents the value provided |
| * @param l long value to represent. |
| * @return LuaNumber that is eithe LuaInteger or LuaDouble representing l |
| * @see LuaValue#valueOf(int) |
| * @see LuaValue#valueOf(double) |
| */ |
| public static LuaNumber valueOf(long l) { |
| int i = (int) l; |
| return l == i ? (i <= 255 && i >= -256 ? intValues[i + 256] : (LuaNumber) new LuaInteger(i)) : (LuaNumber) LuaDouble.valueOf(l); |
| } |
| |
| /** The value being held by this instance. */ |
| public final int v; |
| |
| /** |
| * Package protected constructor. |
| * @see LuaValue#valueOf(int) |
| **/ |
| LuaInteger(int i) { |
| this.v = i; |
| } |
| |
| public boolean isint() { |
| return true; |
| } |
| |
| public boolean isinttype() { |
| return true; |
| } |
| |
| public boolean islong() { |
| return true; |
| } |
| |
| public byte tobyte() { |
| return (byte) v; |
| } |
| |
| public char tochar() { |
| return (char) v; |
| } |
| |
| public double todouble() { |
| return v; |
| } |
| |
| public float tofloat() { |
| return v; |
| } |
| |
| public int toint() { |
| return v; |
| } |
| |
| public long tolong() { |
| return v; |
| } |
| |
| public short toshort() { |
| return (short) v; |
| } |
| |
| public double optdouble(double defval) { |
| return v; |
| } |
| |
| public int optint(int defval) { |
| return v; |
| } |
| |
| public LuaInteger optinteger(LuaInteger defval) { |
| return this; |
| } |
| |
| public long optlong(long defval) { |
| return v; |
| } |
| |
| public String tojstring() { |
| return Integer.toString(v); |
| } |
| |
| public LuaString strvalue() { |
| return LuaString.valueOf(Integer.toString(v)); |
| } |
| |
| public LuaString optstring(LuaString defval) { |
| return LuaString.valueOf(Integer.toString(v)); |
| } |
| |
| public LuaValue tostring() { |
| return LuaString.valueOf(Integer.toString(v)); |
| } |
| |
| public String optjstring(String defval) { |
| return Integer.toString(v); |
| } |
| |
| public LuaInteger checkinteger() { |
| return this; |
| } |
| |
| public boolean isstring() { |
| return true; |
| } |
| |
| public int hashCode() { |
| return v; |
| } |
| |
| public static int hashCode(int x) { |
| return x; |
| } |
| |
| // unary operators |
| public LuaValue neg() { |
| return valueOf(-(long) v); |
| } |
| |
| // object equality, used for key comparison |
| public boolean equals(Object o) { |
| return o instanceof LuaInteger ? ((LuaInteger) o).v == v : false; |
| } |
| |
| // equality w/ metatable processing |
| public LuaValue eq(LuaValue val) { |
| return val.raweq(v) ? TRUE : FALSE; |
| } |
| |
| public boolean eq_b(LuaValue val) { |
| return val.raweq(v); |
| } |
| |
| // equality w/o metatable processing |
| public boolean raweq(LuaValue val) { |
| return val.raweq(v); |
| } |
| |
| public boolean raweq(double val) { |
| return v == val; |
| } |
| |
| public boolean raweq(int val) { |
| return v == val; |
| } |
| |
| // arithmetic operators |
| public LuaValue add(LuaValue rhs) { |
| return rhs.add(v); |
| } |
| |
| public LuaValue add(double lhs) { |
| return LuaDouble.valueOf(lhs + v); |
| } |
| |
| public LuaValue add(int lhs) { |
| return LuaInteger.valueOf(lhs + (long) v); |
| } |
| |
| public LuaValue sub(LuaValue rhs) { |
| return rhs.subFrom(v); |
| } |
| |
| public LuaValue sub(double rhs) { |
| return LuaDouble.valueOf(v - rhs); |
| } |
| |
| public LuaValue sub(int rhs) { |
| return LuaDouble.valueOf(v - rhs); |
| } |
| |
| public LuaValue subFrom(double lhs) { |
| return LuaDouble.valueOf(lhs - v); |
| } |
| |
| public LuaValue subFrom(int lhs) { |
| return LuaInteger.valueOf(lhs - (long) v); |
| } |
| |
| public LuaValue mul(LuaValue rhs) { |
| return rhs.mul(v); |
| } |
| |
| public LuaValue mul(double lhs) { |
| return LuaDouble.valueOf(lhs * v); |
| } |
| |
| public LuaValue mul(int lhs) { |
| return LuaInteger.valueOf(lhs * (long) v); |
| } |
| |
| public LuaValue pow(LuaValue rhs) { |
| return rhs.powWith(v); |
| } |
| |
| public LuaValue pow(double rhs) { |
| return MathLib.dpow(v, rhs); |
| } |
| |
| public LuaValue pow(int rhs) { |
| return MathLib.dpow(v, rhs); |
| } |
| |
| public LuaValue powWith(double lhs) { |
| return MathLib.dpow(lhs, v); |
| } |
| |
| public LuaValue powWith(int lhs) { |
| return MathLib.dpow(lhs, v); |
| } |
| |
| public LuaValue div(LuaValue rhs) { |
| return rhs.divInto(v); |
| } |
| |
| public LuaValue div(double rhs) { |
| return LuaDouble.ddiv(v, rhs); |
| } |
| |
| public LuaValue div(int rhs) { |
| return LuaDouble.ddiv(v, rhs); |
| } |
| |
| public LuaValue divInto(double lhs) { |
| return LuaDouble.ddiv(lhs, v); |
| } |
| |
| public LuaValue mod(LuaValue rhs) { |
| return rhs.modFrom(v); |
| } |
| |
| public LuaValue mod(double rhs) { |
| return LuaDouble.dmod(v, rhs); |
| } |
| |
| public LuaValue mod(int rhs) { |
| return LuaDouble.dmod(v, rhs); |
| } |
| |
| public LuaValue modFrom(double lhs) { |
| return LuaDouble.dmod(lhs, v); |
| } |
| |
| // relational operators |
| public LuaValue lt(LuaValue rhs) { |
| return rhs.gt_b(v) ? TRUE : FALSE; |
| } |
| |
| public LuaValue lt(double rhs) { |
| return v < rhs ? TRUE : FALSE; |
| } |
| |
| public LuaValue lt(int rhs) { |
| return v < rhs ? TRUE : FALSE; |
| } |
| |
| public boolean lt_b(LuaValue rhs) { |
| return rhs.gt_b(v); |
| } |
| |
| public boolean lt_b(int rhs) { |
| return v < rhs; |
| } |
| |
| public boolean lt_b(double rhs) { |
| return v < rhs; |
| } |
| |
| public LuaValue lteq(LuaValue rhs) { |
| return rhs.gteq_b(v) ? TRUE : FALSE; |
| } |
| |
| public LuaValue lteq(double rhs) { |
| return v <= rhs ? TRUE : FALSE; |
| } |
| |
| public LuaValue lteq(int rhs) { |
| return v <= rhs ? TRUE : FALSE; |
| } |
| |
| public boolean lteq_b(LuaValue rhs) { |
| return rhs.gteq_b(v); |
| } |
| |
| public boolean lteq_b(int rhs) { |
| return v <= rhs; |
| } |
| |
| public boolean lteq_b(double rhs) { |
| return v <= rhs; |
| } |
| |
| public LuaValue gt(LuaValue rhs) { |
| return rhs.lt_b(v) ? TRUE : FALSE; |
| } |
| |
| public LuaValue gt(double rhs) { |
| return v > rhs ? TRUE : FALSE; |
| } |
| |
| public LuaValue gt(int rhs) { |
| return v > rhs ? TRUE : FALSE; |
| } |
| |
| public boolean gt_b(LuaValue rhs) { |
| return rhs.lt_b(v); |
| } |
| |
| public boolean gt_b(int rhs) { |
| return v > rhs; |
| } |
| |
| public boolean gt_b(double rhs) { |
| return v > rhs; |
| } |
| |
| public LuaValue gteq(LuaValue rhs) { |
| return rhs.lteq_b(v) ? TRUE : FALSE; |
| } |
| |
| public LuaValue gteq(double rhs) { |
| return v >= rhs ? TRUE : FALSE; |
| } |
| |
| public LuaValue gteq(int rhs) { |
| return v >= rhs ? TRUE : FALSE; |
| } |
| |
| public boolean gteq_b(LuaValue rhs) { |
| return rhs.lteq_b(v); |
| } |
| |
| public boolean gteq_b(int rhs) { |
| return v >= rhs; |
| } |
| |
| public boolean gteq_b(double rhs) { |
| return v >= rhs; |
| } |
| |
| // string comparison |
| public int strcmp(LuaString rhs) { |
| typerror("attempt to compare number with string"); |
| return 0; |
| } |
| |
| public int checkint() { |
| return v; |
| } |
| |
| public long checklong() { |
| return v; |
| } |
| |
| public double checkdouble() { |
| return v; |
| } |
| |
| public String checkjstring() { |
| return String.valueOf(v); |
| } |
| |
| public LuaString checkstring() { |
| return valueOf(String.valueOf(v)); |
| } |
| |
| } |