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Java example source code file (NumberType.java)
The NumberType.java Java example source code/* * Copyright (c) 2010, 2013, Oracle and/or its affiliates. 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. Oracle designates this * particular file as subject to the "Classpath" exception as provided * by Oracle in the LICENSE file that accompanied this code. * * 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 Oracle, 500 Oracle Parkway, Redwood Shores, CA 94065 USA * or visit www.oracle.com if you need additional information or have any * questions. */ package jdk.nashorn.internal.codegen.types; import static jdk.internal.org.objectweb.asm.Opcodes.DADD; import static jdk.internal.org.objectweb.asm.Opcodes.DCMPG; import static jdk.internal.org.objectweb.asm.Opcodes.DCMPL; import static jdk.internal.org.objectweb.asm.Opcodes.DCONST_0; import static jdk.internal.org.objectweb.asm.Opcodes.DCONST_1; import static jdk.internal.org.objectweb.asm.Opcodes.DDIV; import static jdk.internal.org.objectweb.asm.Opcodes.DLOAD; import static jdk.internal.org.objectweb.asm.Opcodes.DMUL; import static jdk.internal.org.objectweb.asm.Opcodes.DNEG; import static jdk.internal.org.objectweb.asm.Opcodes.DREM; import static jdk.internal.org.objectweb.asm.Opcodes.DRETURN; import static jdk.internal.org.objectweb.asm.Opcodes.DSTORE; import static jdk.internal.org.objectweb.asm.Opcodes.DSUB; import static jdk.nashorn.internal.codegen.CompilerConstants.staticCallNoLookup; import jdk.internal.org.objectweb.asm.MethodVisitor; import jdk.nashorn.internal.codegen.CompilerConstants; import jdk.nashorn.internal.codegen.ObjectClassGenerator; import jdk.nashorn.internal.runtime.JSType; class NumberType extends NumericType { private static final CompilerConstants.Call VALUE_OF = staticCallNoLookup(Double.class, "valueOf", Double.class, double.class); protected NumberType() { super("double", double.class, 4, 2); } @Override public Type nextWider() { return OBJECT; } @Override public Class<?> getBoxedType() { return Double.class; } @Override public Type cmp(final MethodVisitor method, final boolean isCmpG) { method.visitInsn(isCmpG ? DCMPG : DCMPL); return INT; } @Override public Type load(final MethodVisitor method, final int slot) { assert slot != -1; method.visitVarInsn(DLOAD, slot); return NUMBER; } @Override public void store(final MethodVisitor method, final int slot) { assert slot != -1; method.visitVarInsn(DSTORE, slot); } @Override public Type loadUndefined(final MethodVisitor method) { method.visitLdcInsn(ObjectClassGenerator.UNDEFINED_DOUBLE); return NUMBER; } @Override public Type ldc(final MethodVisitor method, final Object c) { assert c instanceof Double; final double value = (Double) c; if (Double.doubleToLongBits(value) == 0L) { // guard against -0.0 method.visitInsn(DCONST_0); } else if (value == 1.0) { method.visitInsn(DCONST_1); } else { method.visitLdcInsn(value); } return NUMBER; } @Override public Type convert(final MethodVisitor method, final Type to) { if (isEquivalentTo(to)) { return null; } if (to.isInteger()) { invokeStatic(method, JSType.TO_INT32_D); } else if (to.isLong()) { invokeStatic(method, JSType.TO_INT64_D); } else if (to.isBoolean()) { invokeStatic(method, JSType.TO_BOOLEAN_D); } else if (to.isString()) { invokeStatic(method, JSType.TO_STRING_D); } else if (to.isObject()) { invokeStatic(method, VALUE_OF); } else { assert false : "Illegal conversion " + this + " -> " + to; } return to; } @Override public Type add(final MethodVisitor method) { method.visitInsn(DADD); return NUMBER; } @Override public Type sub(final MethodVisitor method) { method.visitInsn(DSUB); return NUMBER; } @Override public Type mul(final MethodVisitor method) { method.visitInsn(DMUL); return NUMBER; } @Override public Type div(final MethodVisitor method) { method.visitInsn(DDIV); return NUMBER; } @Override public Type rem(final MethodVisitor method) { method.visitInsn(DREM); return NUMBER; } @Override public Type neg(final MethodVisitor method) { method.visitInsn(DNEG); return NUMBER; } @Override public void _return(final MethodVisitor method) { method.visitInsn(DRETURN); } } Other Java examples (source code examples)Here is a short list of links related to this Java NumberType.java source code file: |
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