1  /*
     2   * Copyright the original author or authors.
     3   * 
     4   * Licensed under the MOZILLA PUBLIC LICENSE, Version 1.1 (the "License");
     5   * you may not use this file except in compliance with the License.
     6   * You may obtain a copy of the License at
     7   * 
     8   *      http://www.mozilla.org/MPL/MPL-1.1.html
     9   * 
    10   * Unless required by applicable law or agreed to in writing, software
    11   * distributed under the License is distributed on an "AS IS" BASIS,
    12   * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
    13   * See the License for the specific language governing permissions and
    14   * limitations under the License.
    15   */
    16  
    17  import org.as2lib.regexp.AsciiUtil;
    18  import org.as2lib.regexp.node.Node; 
    19  import org.as2lib.regexp.node.NotSingleA;
    20  import org.as2lib.regexp.node.TreeInfo;
    21  
    22  /**
    23   * {@code SingleA} is a node class for a single case independent character 
    24   * value.
    25   * 
    26   * @author Igor Sadovskiy
    27   */
    28   
    29  class org.as2lib.regexp.node.SingleA extends Node {
    30  	
    31      private var ch:Number;
    32      
    33      public function SingleA(n:Number) {
    34          ch = AsciiUtil.toLower(n);
    35      }
    36      
    37      public function dup(flag:Boolean):Node {
    38          return (flag) ? new NotSingleA(ch) : new SingleA(ch);
    39      }
    40      
    41      public function match(matcher:Object, i:Number, seq:String):Boolean {
    42          if (i < matcher.to) {
    43              var c:Number = seq.charCodeAt(i);
    44              if (c == ch || AsciiUtil.toLower(c) == ch) {
    45                  return next.match(matcher, i+1, seq);
    46              }
    47          }
    48          return false;
    49      }
    50  
    51      public function study(info:TreeInfo):Boolean {
    52          info.minLength++;
    53          info.maxLength++;
    54          return next.study(info);
    55      }
    56  }
    57
as2api