mirror of git://gcc.gnu.org/git/gcc.git
411 lines
12 KiB
Java
411 lines
12 KiB
Java
/* gnu/regexp/RETokenNamedProperty.java
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Copyright (C) 2006 Free Software Foundation, Inc.
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This file is part of GNU Classpath.
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GNU Classpath is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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the Free Software Foundation; either version 2, or (at your option)
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any later version.
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GNU Classpath is distributed in the hope that it will be useful, but
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WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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General Public License for more details.
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You should have received a copy of the GNU General Public License
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along with GNU Classpath; see the file COPYING. If not, write to the
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Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
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02110-1301 USA.
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Linking this library statically or dynamically with other modules is
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making a combined work based on this library. Thus, the terms and
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conditions of the GNU General Public License cover the whole
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combination.
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As a special exception, the copyright holders of this library give you
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permission to link this library with independent modules to produce an
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executable, regardless of the license terms of these independent
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modules, and to copy and distribute the resulting executable under
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terms of your choice, provided that you also meet, for each linked
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independent module, the terms and conditions of the license of that
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module. An independent module is a module which is not derived from
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or based on this library. If you modify this library, you may extend
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this exception to your version of the library, but you are not
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obligated to do so. If you do not wish to do so, delete this
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exception statement from your version. */
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package gnu.java.util.regex;
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import gnu.java.lang.CPStringBuilder;
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import java.lang.reflect.InvocationTargetException;
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import java.lang.reflect.Method;
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final class RETokenNamedProperty extends REToken
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{
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String name;
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boolean insens;
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boolean negate;
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Handler handler;
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// Grouped properties
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static final byte[] LETTER = new byte[]{ Character.LOWERCASE_LETTER,
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Character.UPPERCASE_LETTER,
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Character.TITLECASE_LETTER,
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Character.MODIFIER_LETTER,
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Character.OTHER_LETTER
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};
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static final byte[] MARK = new byte[]{ Character.NON_SPACING_MARK,
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Character.COMBINING_SPACING_MARK,
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Character.ENCLOSING_MARK
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};
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static final byte[] SEPARATOR = new byte[]{ Character.SPACE_SEPARATOR,
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Character.LINE_SEPARATOR,
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Character.PARAGRAPH_SEPARATOR
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};
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static final byte[] SYMBOL = new byte[]{ Character.MATH_SYMBOL,
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Character.CURRENCY_SYMBOL,
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Character.MODIFIER_SYMBOL,
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Character.OTHER_SYMBOL
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};
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static final byte[] NUMBER = new byte[]{ Character.DECIMAL_DIGIT_NUMBER,
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Character.LETTER_NUMBER,
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Character.OTHER_NUMBER
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};
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static final byte[] PUNCTUATION = new byte[]{ Character.DASH_PUNCTUATION,
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Character.START_PUNCTUATION,
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Character.END_PUNCTUATION,
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Character.CONNECTOR_PUNCTUATION,
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Character.OTHER_PUNCTUATION,
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Character.INITIAL_QUOTE_PUNCTUATION,
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Character.FINAL_QUOTE_PUNCTUATION
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};
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static final byte[] OTHER = new byte[]{ Character.CONTROL,
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Character.FORMAT,
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Character.PRIVATE_USE,
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Character.SURROGATE,
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Character.UNASSIGNED
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};
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RETokenNamedProperty (int subIndex, String name, boolean insens,
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boolean negate) throws REException
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{
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super (subIndex);
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this.name = name;
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this.insens = insens;
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this.negate = negate;
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handler = getHandler (name);
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}
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int getMinimumLength ()
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{
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return 1;
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}
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int getMaximumLength ()
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{
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return 1;
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}
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REMatch matchThis (CharIndexed input, REMatch mymatch)
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{
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char ch = input.charAt (mymatch.index);
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boolean retval = matchOneChar (ch);
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if (retval)
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{
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++mymatch.index;
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return mymatch;
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}
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return null;
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}
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private boolean matchOneChar (char ch)
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{
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if (ch == CharIndexed.OUT_OF_BOUNDS)
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return false;
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boolean retval = handler.includes (ch);
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if (insens)
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{
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retval = retval ||
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handler.includes (toUpperCase (ch, unicodeAware)) ||
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handler.includes (toLowerCase (ch, unicodeAware));
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}
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if (negate)
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retval = !retval;
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return retval;
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}
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boolean returnsFixedLengthMatches ()
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{
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return true;
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}
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int findFixedLengthMatches (CharIndexed input, REMatch mymatch, int max)
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{
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int index = mymatch.index;
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int numRepeats = 0;
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while (true)
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{
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if (numRepeats >= max)
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break;
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char ch = input.charAt (index++);
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if (!matchOneChar (ch))
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break;
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numRepeats++;
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}
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return numRepeats;
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}
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void dump (CPStringBuilder os)
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{
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os.append ("\\").append (negate ? "P" : "p").append ("{" + name + "}");
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}
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private abstract static class Handler
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{
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public abstract boolean includes (char c);
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}
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private Handler getHandler (String name) throws REException
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{
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if (name.equals ("Lower") || name.equals ("Upper") ||
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// name.equals("ASCII") ||
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name.equals ("Alpha") ||
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name.equals ("Digit") ||
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name.equals ("Alnum") ||
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name.equals ("Punct") ||
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name.equals ("Graph") ||
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name.equals ("Print") ||
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name.equals ("Blank") ||
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name.equals ("Cntrl") ||
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name.equals ("XDigit") || name.equals ("Space"))
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{
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return new POSIXHandler (name);
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}
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if (name.startsWith ("In"))
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{
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try
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{
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name = name.substring (2);
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Character.UnicodeBlock block =
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Character.UnicodeBlock.forName (name);
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return new UnicodeBlockHandler (block);
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}
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catch (IllegalArgumentException e)
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{
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throw new REException ("Invalid Unicode block name: " + name,
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REException.REG_ESCAPE, 0);
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}
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}
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if (name.startsWith ("Is"))
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{
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name = name.substring (2);
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}
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// "grouped properties"
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if (name.equals ("L"))
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return new UnicodeCategoriesHandler (LETTER);
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if (name.equals ("M"))
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return new UnicodeCategoriesHandler (MARK);
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if (name.equals ("Z"))
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return new UnicodeCategoriesHandler (SEPARATOR);
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if (name.equals ("S"))
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return new UnicodeCategoriesHandler (SYMBOL);
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if (name.equals ("N"))
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return new UnicodeCategoriesHandler (NUMBER);
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if (name.equals ("P"))
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return new UnicodeCategoriesHandler (PUNCTUATION);
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if (name.equals ("C"))
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return new UnicodeCategoriesHandler (OTHER);
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if (name.equals ("Mc"))
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return new UnicodeCategoryHandler (Character.COMBINING_SPACING_MARK);
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if (name.equals ("Pc"))
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return new UnicodeCategoryHandler (Character.CONNECTOR_PUNCTUATION);
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if (name.equals ("Cc"))
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return new UnicodeCategoryHandler (Character.CONTROL);
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if (name.equals ("Sc"))
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return new UnicodeCategoryHandler (Character.CURRENCY_SYMBOL);
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if (name.equals ("Pd"))
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return new UnicodeCategoryHandler (Character.DASH_PUNCTUATION);
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if (name.equals ("Nd"))
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return new UnicodeCategoryHandler (Character.DECIMAL_DIGIT_NUMBER);
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if (name.equals ("Me"))
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return new UnicodeCategoryHandler (Character.ENCLOSING_MARK);
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if (name.equals ("Pe"))
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return new UnicodeCategoryHandler (Character.END_PUNCTUATION);
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if (name.equals ("Pf"))
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return new UnicodeCategoryHandler (Character.FINAL_QUOTE_PUNCTUATION);
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if (name.equals ("Cf"))
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return new UnicodeCategoryHandler (Character.FORMAT);
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if (name.equals ("Pi"))
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return new UnicodeCategoryHandler (Character.INITIAL_QUOTE_PUNCTUATION);
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if (name.equals ("Nl"))
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return new UnicodeCategoryHandler (Character.LETTER_NUMBER);
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if (name.equals ("Zl"))
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return new UnicodeCategoryHandler (Character.LINE_SEPARATOR);
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if (name.equals ("Ll"))
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return new UnicodeCategoryHandler (Character.LOWERCASE_LETTER);
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if (name.equals ("Sm"))
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return new UnicodeCategoryHandler (Character.MATH_SYMBOL);
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if (name.equals ("Lm"))
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return new UnicodeCategoryHandler (Character.MODIFIER_LETTER);
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if (name.equals ("Sk"))
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return new UnicodeCategoryHandler (Character.MODIFIER_SYMBOL);
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if (name.equals ("Mn"))
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return new UnicodeCategoryHandler (Character.NON_SPACING_MARK);
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if (name.equals ("Lo"))
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return new UnicodeCategoryHandler (Character.OTHER_LETTER);
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if (name.equals ("No"))
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return new UnicodeCategoryHandler (Character.OTHER_NUMBER);
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if (name.equals ("Po"))
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return new UnicodeCategoryHandler (Character.OTHER_PUNCTUATION);
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if (name.equals ("So"))
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return new UnicodeCategoryHandler (Character.OTHER_SYMBOL);
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if (name.equals ("Zp"))
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return new UnicodeCategoryHandler (Character.PARAGRAPH_SEPARATOR);
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if (name.equals ("Co"))
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return new UnicodeCategoryHandler (Character.PRIVATE_USE);
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if (name.equals ("Zs"))
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return new UnicodeCategoryHandler (Character.SPACE_SEPARATOR);
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if (name.equals ("Ps"))
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return new UnicodeCategoryHandler (Character.START_PUNCTUATION);
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if (name.equals ("Cs"))
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return new UnicodeCategoryHandler (Character.SURROGATE);
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if (name.equals ("Lt"))
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return new UnicodeCategoryHandler (Character.TITLECASE_LETTER);
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if (name.equals ("Cn"))
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return new UnicodeCategoryHandler (Character.UNASSIGNED);
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if (name.equals ("Lu"))
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return new UnicodeCategoryHandler (Character.UPPERCASE_LETTER);
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if (name.equals ("all"))
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return new Handler ()
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{
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public boolean includes (char c)
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{
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return true;
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}
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};
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if (name.startsWith ("java"))
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{
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try
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{
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Method m = Character.class.getMethod ("is" + name.substring (4),
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Character.TYPE);
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return new JavaCategoryHandler (m);
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}
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catch (NoSuchMethodException e)
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{
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throw new REException ("Unsupported Java handler: " + name, e,
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REException.REG_ESCAPE, 0);
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}
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}
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throw new REException ("unsupported name " + name, REException.REG_ESCAPE,
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0);
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}
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private static class POSIXHandler extends Handler
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{
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private RETokenPOSIX retoken;
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public POSIXHandler (String name)
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{
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int posixId = RETokenPOSIX.intValue (name.toLowerCase ());
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if (posixId != -1)
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retoken = new RETokenPOSIX (0, posixId, false, false);
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else
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throw new RuntimeException ("Unknown posix ID: " + name);
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}
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public boolean includes (char c)
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{
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return retoken.matchOneChar (c);
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}
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}
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private static class UnicodeCategoryHandler extends Handler
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{
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public UnicodeCategoryHandler (byte category)
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{
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this.category = (int) category;
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}
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private int category;
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public boolean includes (char c)
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{
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return Character.getType (c) == category;
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}
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}
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private static class UnicodeCategoriesHandler extends Handler
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{
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public UnicodeCategoriesHandler (byte[]categories)
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{
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this.categories = categories;
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}
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private byte[] categories;
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public boolean includes (char c)
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{
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int category = Character.getType (c);
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for (int i = 0; i < categories.length; i++)
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if (category == categories[i])
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return true;
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return false;
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}
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}
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private static class UnicodeBlockHandler extends Handler
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{
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public UnicodeBlockHandler (Character.UnicodeBlock block)
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{
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this.block = block;
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}
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private Character.UnicodeBlock block;
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public boolean includes (char c)
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{
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Character.UnicodeBlock cblock = Character.UnicodeBlock.of (c);
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return (cblock != null && cblock.equals (block));
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}
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}
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/**
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* Handle the Java-specific extensions \p{javaX} where X
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* is a method from Character of the form isX
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*
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* @author Andrew John Hughes (gnu_andrew@member.fsf.org)
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*/
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private static class JavaCategoryHandler extends Handler
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{
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private Method method;
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public JavaCategoryHandler (Method m)
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{
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this.method = m;
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}
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public boolean includes (char c)
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{
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try
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{
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return (Boolean) method.invoke (null, c);
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}
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catch (IllegalAccessException e)
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{
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throw new InternalError ("Unable to access method " + method);
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}
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catch (InvocationTargetException e)
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{
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throw new InternalError ("Error invoking " + method);
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}
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}
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}
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}
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