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.node.Node;
    18  import org.as2lib.regexp.node.TreeInfo;
    19   
    20  /**
    21   * {@code UnixDollar} is a node to anchor at the end of a line or the end 
    22   * of input based on the multiline mode when in unix lines mode.
    23   * 
    24   * @author Igor Sadovskiy
    25   */
    26   
    27  class org.as2lib.regexp.node.UnixDollar extends Node {
    28  	
    29      private var multiline:Boolean;
    30      
    31      public function UnixDollar(mul:Boolean) {
    32          multiline = mul;
    33      }
    34      
    35      public function match(matcher:Object, i:Number, seq:String):Boolean {
    36          if (i < matcher.to) {
    37              var ch:Number = seq.charCodeAt(i);
    38              if (ch == ord("\n")) {
    39                  // If not multiline, then only possible to
    40                  // match at very end or one before end
    41                  if (multiline == false && i != matcher.to - 1) return false;
    42              } else {
    43                  return false;
    44              }
    45          }
    46          return next.match(matcher, i, seq);
    47      }
    48      
    49      public function study(info:TreeInfo):Boolean {
    50          next.study(info);
    51          return info.deterministic;
    52      }
    53  }
    54
as2api