From 554fd8c5195424bdbcabf5de30fdc183aba391bd Mon Sep 17 00:00:00 2001 From: upstream source tree Date: Sun, 15 Mar 2015 20:14:05 -0400 Subject: obtained gcc-4.6.4.tar.bz2 from upstream website; verified gcc-4.6.4.tar.bz2.sig; imported gcc-4.6.4 source tree from verified upstream tarball. downloading a git-generated archive based on the 'upstream' tag should provide you with a source tree that is binary identical to the one extracted from the above tarball. if you have obtained the source via the command 'git clone', however, do note that line-endings of files in your working directory might differ from line-endings of the respective files in the upstream repository. --- .../classpath/gnu/xml/xpath/ArithmeticExpr.java | 170 +++++++++++++++++++++ 1 file changed, 170 insertions(+) create mode 100644 libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java (limited to 'libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java') diff --git a/libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java b/libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java new file mode 100644 index 000000000..a7bc62f2e --- /dev/null +++ b/libjava/classpath/gnu/xml/xpath/ArithmeticExpr.java @@ -0,0 +1,170 @@ +/* ArithmeticExpr.java -- + Copyright (C) 2004 Free Software Foundation, Inc. + +This file is part of GNU Classpath. + +GNU Classpath is free software; you can redistribute it and/or modify +it under the terms of the GNU General Public License as published by +the Free Software Foundation; either version 2, or (at your option) +any later version. + +GNU Classpath 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 for more details. + +You should have received a copy of the GNU General Public License +along with GNU Classpath; see the file COPYING. If not, write to the +Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA +02110-1301 USA. + +Linking this library statically or dynamically with other modules is +making a combined work based on this library. Thus, the terms and +conditions of the GNU General Public License cover the whole +combination. + +As a special exception, the copyright holders of this library give you +permission to link this library with independent modules to produce an +executable, regardless of the license terms of these independent +modules, and to copy and distribute the resulting executable under +terms of your choice, provided that you also meet, for each linked +independent module, the terms and conditions of the license of that +module. An independent module is a module which is not derived from +or based on this library. If you modify this library, you may extend +this exception to your version of the library, but you are not +obligated to do so. If you do not wish to do so, delete this +exception statement from your version. */ + +package gnu.xml.xpath; + +import gnu.java.lang.CPStringBuilder; + +import javax.xml.namespace.QName; +import org.w3c.dom.Node; + +/** + * Binary arithmetic expression. + * + * @author Chris Burdess + */ +final class ArithmeticExpr + extends Expr +{ + + static final int ADD = 0; + static final int SUBTRACT = 1; + static final int MULTIPLY = 2; + static final int DIVIDE = 3; + static final int MODULO = 4; + + final Expr lhs; + final Expr rhs; + final int op; + + ArithmeticExpr(Expr lhs, Expr rhs, int op) + { + this.lhs = lhs; + this.rhs = rhs; + switch (op) + { + case ADD: + case SUBTRACT: + case MULTIPLY: + case DIVIDE: + case MODULO: + this.op = op; + break; + default: + throw new IllegalArgumentException(); + } + } + + public Object evaluate(Node context, int pos, int len) + { + Object left = lhs.evaluate(context, pos, len); + Object right = rhs.evaluate(context, pos, len); + + double ln = _number(context, left); + double rn = _number(context, right); + switch (op) + { + case ADD: + return new Double(ln + rn); + case SUBTRACT: + return new Double(ln - rn); + case MULTIPLY: + return new Double(ln * rn); + case DIVIDE: + if (rn == 0.0d || rn == -0.0d) + { + if (ln == 0.0d || ln == -0.0d) + { + return new Double(Double.NaN); + } + else + { + return new Double(ln < 0.0d ? + Double.NEGATIVE_INFINITY : + Double.POSITIVE_INFINITY); + } + } + return new Double(ln / rn); + case MODULO: + if (rn == 0.0d || rn == 0.0d) + { + if (ln == 0.0d || ln == -0.0d) + { + return new Double(Double.NaN); + } + else + { + return new Double(ln < 0.0d ? + Double.NEGATIVE_INFINITY : + Double.POSITIVE_INFINITY); + } + } + return new Double(ln % rn); + default: + throw new IllegalStateException(); + } + } + + public Expr clone(Object context) + { + return new ArithmeticExpr(lhs.clone(context), rhs.clone(context), op); + } + + public boolean references(QName var) + { + return (lhs.references(var) || rhs.references(var)); + } + + public String toString() + { + CPStringBuilder buf = new CPStringBuilder(); + buf.append(lhs); + buf.append(' '); + switch (op) + { + case ADD: + buf.append('+'); + break; + case SUBTRACT: + buf.append('-'); + break; + case MULTIPLY: + buf.append('*'); + break; + case DIVIDE: + buf.append("div"); + break; + case MODULO: + buf.append("mod"); + break; + } + buf.append(' '); + buf.append(rhs); + return buf.toString(); + } + +} -- cgit v1.2.3