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.TreeInfo;
    20  
    21  /**
    22   * {@code SliceA} is a node class for a sequence of case independent 
    23   * literal characters.
    24   * 
    25   * @author Igor Sadovskiy
    26   */
    27   
    28  class org.as2lib.regexp.node.SliceA extends Node {
    29  	
    30      private var buffer:Array;
    31      
    32      public function SliceA(buf:Array) {
    33          buffer = buf;
    34      }
    35      
    36      public function match(matcher:Object, i:Number, seq:String):Boolean {
    37          var buf:Array = buffer;
    38          var len:Number = buf.length;
    39          if (i + len > matcher.to) return false;
    40  
    41          for (var j:Number = 0; j < len; j++) {
    42              var c:Number = AsciiUtil.toLower(seq.charCodeAt(i+j));
    43              if (buf[j] != c) return false;
    44          }
    45          
    46          return next.match(matcher, i+len, seq);
    47      }
    48      
    49      public function study(info:TreeInfo):Boolean {
    50          info.minLength += buffer.length;
    51          info.maxLength += buffer.length;
    52          return next.study(info);
    53      }
    54  }
    55  
    56
as2api