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Diffstat (limited to 'libjava/gnu/regexp/RETokenStart.java')
-rw-r--r-- | libjava/gnu/regexp/RETokenStart.java | 87 |
1 files changed, 87 insertions, 0 deletions
diff --git a/libjava/gnu/regexp/RETokenStart.java b/libjava/gnu/regexp/RETokenStart.java new file mode 100644 index 0000000..8adb8c8 --- /dev/null +++ b/libjava/gnu/regexp/RETokenStart.java @@ -0,0 +1,87 @@ +/* gnu/regexp/RETokenStart.java + Copyright (C) 1998-2001, 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., 59 Temple Place, Suite 330, Boston, MA +02111-1307 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.regexp; + +class RETokenStart extends REToken { + private String newline; // matches after a newline + + RETokenStart(int subIndex, String newline) { + super(subIndex); + this.newline = newline; + } + + boolean match(CharIndexed input, REMatch mymatch) { + // charAt(index-n) may be unknown on a Reader/InputStream. FIXME + // Match after a newline if in multiline mode + + if (newline != null) { + int len = newline.length(); + if (mymatch.offset >= len) { + boolean found = true; + char z; + int i = 0; // position in REToken.newline + char ch = input.charAt(mymatch.index - len); + do { + z = newline.charAt(i); + if (ch != z) { + found = false; + break; + } + ++i; + ch = input.charAt(mymatch.index - len + i); + } while (i < len); + + if (found) return next(input, mymatch); + } + } + + // Don't match at all if REG_NOTBOL is set. + if ((mymatch.eflags & RE.REG_NOTBOL) > 0) return false; + + if ((mymatch.eflags & RE.REG_ANCHORINDEX) > 0) + return (mymatch.anchor == mymatch.offset) ? + next(input, mymatch) : false; + else + return ((mymatch.index == 0) && (mymatch.offset == 0)) ? + next(input, mymatch) : false; + } + + void dump(StringBuffer os) { + os.append('^'); + } +} |