diff options
author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
---|---|---|
committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/xml/xpath/SubstringFunction.java | |
download | cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.bz2 cbb-gcc-4.6.4-554fd8c5195424bdbcabf5de30fdc183aba391bd.tar.xz |
obtained gcc-4.6.4.tar.bz2 from upstream website;upstream
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.
Diffstat (limited to 'libjava/classpath/gnu/xml/xpath/SubstringFunction.java')
-rw-r--r-- | libjava/classpath/gnu/xml/xpath/SubstringFunction.java | 119 |
1 files changed, 119 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/xml/xpath/SubstringFunction.java b/libjava/classpath/gnu/xml/xpath/SubstringFunction.java new file mode 100644 index 000000000..d17c3b662 --- /dev/null +++ b/libjava/classpath/gnu/xml/xpath/SubstringFunction.java @@ -0,0 +1,119 @@ +/* SubstringFunction.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 java.util.List; +import javax.xml.namespace.QName; +import org.w3c.dom.Node; + +/** + * The substring function returns the substring of the first argument + * starting at the position specified in the second argument with length + * specified in the third argument. For example, substring("12345",2,3) + * returns "234". If the third argument is not specified, it returns the + * substring starting at the position specified in the second argument and + * continuing to the end of the string. For example, substring("12345",2) + * returns "2345". + * + * @author <a href='mailto:dog@gnu.org'>Chris Burdess</a> + */ +final class SubstringFunction + extends Expr +{ + + final Expr arg1; + final Expr arg2; + final Expr arg3; + + SubstringFunction(List<Expr> args) + { + this(args.get(0), args.get(1), + (args.size() > 2) ? args.get(2) : null); + } + + SubstringFunction(Expr arg1, Expr arg2, Expr arg3) + { + this.arg1 = arg1; + this.arg2 = arg2; + this.arg3 = arg3; + } + + @Override + public Object evaluate(Node context, int pos, int len) + { + Object val1 = arg1.evaluate(context, pos, len); + Object val2 = arg2.evaluate(context, pos, len); + String s = _string(context, val1); + int p = Expr.intValue(val2) - 1; + if (p < 0) + p = 0; + + int l = s.length() - p; + if (l <= 0) + return ""; + + if (arg3 != null) + { + Object val3 = arg3.evaluate(context, pos, len); + int v3 = Expr.intValue(val3); + if (v3 < l) + l = v3; + } + + return s.substring(p, p + l); + } + + public Expr clone(Object context) + { + return new SubstringFunction(arg1.clone(context), arg2.clone(context), + (arg3 == null) ? null : arg3.clone(context)); + } + + public boolean references(QName var) + { + return (arg1.references(var) || arg2.references(var) || + (arg3 == null) ? false : arg3.references(var)); + } + + public String toString() + { + return (arg3 == null) ? "substring(" + arg1 + "," + arg2 + ")" : + "substring(" + arg1 + "," + arg2 + "," + arg3 + ")"; + } + +} |