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Diffstat (limited to 'gcc-4.4.3/libjava/classpath/gnu/java/util/regex/RETokenStart.java')
| -rw-r--r-- | gcc-4.4.3/libjava/classpath/gnu/java/util/regex/RETokenStart.java | 153 |
1 files changed, 153 insertions, 0 deletions
diff --git a/gcc-4.4.3/libjava/classpath/gnu/java/util/regex/RETokenStart.java b/gcc-4.4.3/libjava/classpath/gnu/java/util/regex/RETokenStart.java new file mode 100644 index 000000000..6a8d247c9 --- /dev/null +++ b/gcc-4.4.3/libjava/classpath/gnu/java/util/regex/RETokenStart.java @@ -0,0 +1,153 @@ +/* gnu/regexp/RETokenStart.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; + +class RETokenStart extends REToken +{ + private String newline; // matches after a newline + private boolean check_java_line_terminators; + + RETokenStart (int subIndex, String newline) + { + super (subIndex); + this.newline = newline; + this.check_java_line_terminators = false; + } + + RETokenStart (int subIndex, String newline, boolean b) + { + super (subIndex); + this.newline = newline; + this.check_java_line_terminators = b; + } + + @Override + int getMaximumLength () + { + return 0; + } + + @Override + REMatch matchThis (CharIndexed input, REMatch mymatch) + { + // charAt(index-n) may be unknown on a Reader/InputStream. FIXME + // Match after a newline if in multiline mode + + if (check_java_line_terminators) + { + char ch = input.charAt (mymatch.index - 1); + if (ch != CharIndexed.OUT_OF_BOUNDS) + { + if (ch == '\n') + return mymatch; + if (ch == '\r') + { + char ch1 = input.charAt (mymatch.index); + if (ch1 != '\n') + return mymatch; + return null; + } + if (ch == '\u0085') + return mymatch; // A next-line character + if (ch == '\u2028') + return mymatch; // A line-separator character + if (ch == '\u2029') + return mymatch; // A paragraph-separator character + } + } + + 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 mymatch; + } + } + + // Don't match at all if REG_NOTBOL is set. + if ((mymatch.eflags & RE.REG_NOTBOL) > 0) + return null; + + if ((mymatch.eflags & RE.REG_ANCHORINDEX) > 0) + return (mymatch.anchor == mymatch.offset) ? mymatch : null; + else + return ((mymatch.index == 0) && (mymatch.offset == 0)) ? mymatch : null; + } + + @Override + boolean returnsFixedLengthMatches () + { + return true; + } + + @Override + int findFixedLengthMatches (CharIndexed input, REMatch mymatch, int max) + { + if (matchThis (input, mymatch) != null) + return max; + else + return 0; + } + + @Override + void dump (CPStringBuilder os) + { + os.append ('^'); + } +} |