Home | History | Annotate | Download | only in Antlr3.Runtime 
      1 /*
      2  * [The "BSD licence"]
      3  * Copyright (c) 2005-2008 Terence Parr
      4  * All rights reserved.
      5  *
      6  * Conversion to C#:
      7  * Copyright (c) 2008-2009 Sam Harwell, Pixel Mine, Inc.
      8  * All rights reserved.
      9  *
     10  * Redistribution and use in source and binary forms, with or without
     11  * modification, are permitted provided that the following conditions
     12  * are met:
     13  * 1. Redistributions of source code must retain the above copyright
     14  *    notice, this list of conditions and the following disclaimer.
     15  * 2. Redistributions in binary form must reproduce the above copyright
     16  *    notice, this list of conditions and the following disclaimer in the
     17  *    documentation and/or other materials provided with the distribution.
     18  * 3. The name of the author may not be used to endorse or promote products
     19  *    derived from this software without specific prior written permission.
     20  *
     21  * THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
     22  * IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
     23  * OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
     24  * IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
     25  * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
     26  * NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
     27  * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
     28  * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
     29  * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
     30  * THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
     31  */
     32 
     33 namespace Antlr.Runtime
     34 {
     35     using Encoding = System.Text.Encoding;
     36     using File = System.IO.File;
     37 
     38     /** <summary>
     39      *  This is a char buffer stream that is loaded from a file
     40      *  all at once when you construct the object.  This looks very
     41      *  much like an ANTLReader or ANTLRInputStream, but it's a special case
     42      *  since we know the exact size of the object to load.  We can avoid lots
     43      *  of data copying.
     44      *  </summary>
     45      */
     46     [System.Serializable]
     47     [System.Security.Permissions.FileIOPermission(System.Security.Permissions.SecurityAction.Demand, Unrestricted = true)]
     48     public class ANTLRFileStream : ANTLRStringStream
     49     {
     50         protected string fileName;
     51 
     52         public ANTLRFileStream( string fileName )
     53             : this( fileName, null )
     54         {
     55         }
     56 
     57         public ANTLRFileStream( string fileName, Encoding encoding )
     58         {
     59             this.fileName = fileName;
     60             Load( fileName, encoding );
     61         }
     62 
     63         public virtual void Load( string fileName, Encoding encoding )
     64         {
     65             if ( fileName == null )
     66             {
     67                 return;
     68             }
     69 
     70             string text;
     71             if (encoding == null)
     72                 text = File.ReadAllText(fileName);
     73             else
     74                 text = File.ReadAllText(fileName, encoding);
     75 
     76             data = text.ToCharArray();
     77             n = data.Length;
     78         }
     79 
     80         public override string SourceName
     81         {
     82             get
     83             {
     84                 return fileName;
     85             }
     86         }
     87     }
     88 }
     89