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author | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
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committer | upstream source tree <ports@midipix.org> | 2015-03-15 20:14:05 -0400 |
commit | 554fd8c5195424bdbcabf5de30fdc183aba391bd (patch) | |
tree | 976dc5ab7fddf506dadce60ae936f43f58787092 /libjava/classpath/gnu/java/util/regex/RETokenBackRef.java | |
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Diffstat (limited to 'libjava/classpath/gnu/java/util/regex/RETokenBackRef.java')
-rw-r--r-- | libjava/classpath/gnu/java/util/regex/RETokenBackRef.java | 100 |
1 files changed, 100 insertions, 0 deletions
diff --git a/libjava/classpath/gnu/java/util/regex/RETokenBackRef.java b/libjava/classpath/gnu/java/util/regex/RETokenBackRef.java new file mode 100644 index 000000000..52061ca2e --- /dev/null +++ b/libjava/classpath/gnu/java/util/regex/RETokenBackRef.java @@ -0,0 +1,100 @@ +/* gnu/regexp/RETokenBackRef.java + Copyright (C) 2006 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.java.util.regex; + +import gnu.java.lang.CPStringBuilder; + +final class RETokenBackRef extends REToken +{ + private int num; + private boolean insens; + + RETokenBackRef (int subIndex, int num, boolean insens) + { + super (subIndex); + this.num = num; + this.insens = insens; + } + + // should implement getMinimumLength() -- any ideas? + + REMatch matchThis (CharIndexed input, REMatch mymatch) + { + if (num >= mymatch.start.length) + return null; + if (num >= mymatch.end.length) + return null; + int b, e; + b = mymatch.start[num]; + e = mymatch.end[num]; + if ((b == -1) || (e == -1)) + return null; // this shouldn't happen, but... + if (b < 0) + b += 1; + if (e < 0) + e += 1; + for (int i = b; i < e; i++) + { + char c1 = input.charAt (mymatch.index + i - b); + char c2 = input.charAt (i); + if (c1 != c2) + { + if (insens) + { + if (c1 != toLowerCase (c2, unicodeAware) && + c1 != toUpperCase (c2, unicodeAware)) + { + return null; + } + } + else + { + return null; + } + } + } + mymatch.index += e - b; + return mymatch; + } + + void dump (CPStringBuilder os) + { + os.append ('\\').append (num); + } +} |