131 lines
4.1 KiB
Java
131 lines
4.1 KiB
Java
/* gnu/regexp/RETokenOneOf.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., 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.regexp;
|
|
import java.util.Vector;
|
|
|
|
final class RETokenOneOf extends REToken {
|
|
private Vector options;
|
|
private boolean negative;
|
|
|
|
// This constructor is used for convenience when we know the set beforehand,
|
|
// e.g. \d --> new RETokenOneOf("0123456789",false, ..)
|
|
// \D --> new RETokenOneOf("0123456789",true, ..)
|
|
|
|
RETokenOneOf(int subIndex, String optionsStr, boolean negative, boolean insens) {
|
|
super(subIndex);
|
|
options = new Vector();
|
|
this.negative = negative;
|
|
for (int i = 0; i < optionsStr.length(); i++)
|
|
options.addElement(new RETokenChar(subIndex,optionsStr.charAt(i),insens));
|
|
}
|
|
|
|
RETokenOneOf(int subIndex, Vector options, boolean negative) {
|
|
super(subIndex);
|
|
this.options = options;
|
|
this.negative = negative;
|
|
}
|
|
|
|
int getMinimumLength() {
|
|
int min = Integer.MAX_VALUE;
|
|
int x;
|
|
for (int i=0; i < options.size(); i++) {
|
|
if ((x = ((REToken) options.elementAt(i)).getMinimumLength()) < min)
|
|
min = x;
|
|
}
|
|
return min;
|
|
}
|
|
|
|
boolean match(CharIndexed input, REMatch mymatch) {
|
|
if (negative && (input.charAt(mymatch.index) == CharIndexed.OUT_OF_BOUNDS))
|
|
return false;
|
|
|
|
REMatch newMatch = null;
|
|
REMatch last = null;
|
|
REToken tk;
|
|
boolean isMatch;
|
|
for (int i=0; i < options.size(); i++) {
|
|
tk = (REToken) options.elementAt(i);
|
|
REMatch tryMatch = (REMatch) mymatch.clone();
|
|
if (tk.match(input, tryMatch)) { // match was successful
|
|
if (negative) return false;
|
|
|
|
if (next(input, tryMatch)) {
|
|
// Add tryMatch to list of possibilities.
|
|
if (last == null) {
|
|
newMatch = tryMatch;
|
|
last = tryMatch;
|
|
} else {
|
|
last.next = tryMatch;
|
|
last = tryMatch;
|
|
}
|
|
} // next succeeds
|
|
} // is a match
|
|
} // try next option
|
|
|
|
if (newMatch != null) {
|
|
if (negative) {
|
|
return false;
|
|
} else {
|
|
// set contents of mymatch equal to newMatch
|
|
|
|
// try each one that matched
|
|
mymatch.assignFrom(newMatch);
|
|
return true;
|
|
}
|
|
} else {
|
|
if (negative) {
|
|
++mymatch.index;
|
|
return next(input, mymatch);
|
|
} else {
|
|
return false;
|
|
}
|
|
}
|
|
|
|
// index+1 works for [^abc] lists, not for generic lookahead (--> index)
|
|
}
|
|
|
|
void dump(StringBuffer os) {
|
|
os.append(negative ? "[^" : "(?:");
|
|
for (int i = 0; i < options.size(); i++) {
|
|
if (!negative && (i > 0)) os.append('|');
|
|
((REToken) options.elementAt(i)).dumpAll(os);
|
|
}
|
|
os.append(negative ? ']' : ')');
|
|
}
|
|
}
|