forked from jasder/antlr
100 lines
3.3 KiB
C#
100 lines
3.3 KiB
C#
/*
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* [The "BSD license"]
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* Copyright (c) 2013 Terence Parr
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* Copyright (c) 2013 Sam Harwell
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* All rights reserved.
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*
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* Redistribution and use in source and binary forms, with or without
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* modification, are permitted provided that the following conditions
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* are met:
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*
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* 1. Redistributions of source code must retain the above copyright
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* notice, this list of conditions and the following disclaimer.
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* 2. Redistributions in binary form must reproduce the above copyright
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* notice, this list of conditions and the following disclaimer in the
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* documentation and/or other materials provided with the distribution.
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* 3. The name of the author may not be used to endorse or promote products
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* derived from this software without specific prior written permission.
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*
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* THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
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* IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
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* OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
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* IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
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* INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
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* NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
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* THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*/
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using System.IO;
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using Sharpen;
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namespace Antlr4.Runtime
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{
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/// <summary>
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/// This is an
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/// <see cref="AntlrInputStream">AntlrInputStream</see>
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/// that is loaded from a file all at once
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/// when you construct the object.
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/// </summary>
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public class AntlrFileStream : AntlrInputStream
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{
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protected internal string fileName;
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/// <exception cref="System.IO.IOException"></exception>
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public AntlrFileStream(string fileName) : this(fileName, null)
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{
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}
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/// <exception cref="System.IO.IOException"></exception>
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public AntlrFileStream(string fileName, string encoding)
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{
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this.fileName = fileName;
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Load(fileName, encoding);
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}
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/// <exception cref="System.IO.IOException"></exception>
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public virtual void Load(string fileName, string encoding)
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{
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if (fileName == null)
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{
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return;
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}
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FilePath f = new FilePath(fileName);
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int size = (int)f.Length();
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StreamReader isr;
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FileInputStream fis = new FileInputStream(fileName);
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if (encoding != null)
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{
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isr = new StreamReader(fis, encoding);
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}
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else
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{
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isr = new StreamReader(fis);
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}
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try
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{
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data = new char[size];
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n = isr.Read(data);
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if (n < data.Length)
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{
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data = Arrays.CopyOf(data, n);
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}
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}
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finally
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{
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isr.Close();
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}
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}
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public override string SourceName
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{
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get
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{
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return fileName;
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}
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}
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}
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}
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