123 lines
4.2 KiB
C#
123 lines
4.2 KiB
C#
//-----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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// file="ExpSource"
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// Project: StgSharp
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// AuthorGroup: Nitload Space
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// Copyright (c) Nitload Space. All rights reserved.
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//
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// Permission is hereby granted, free of charge, to any person obtaining a copy
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// of this software and associated documentation files (the "Software"), to deal
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// in the Software without restriction, including without limitation the rights
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// to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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// copies of the Software, and to permit persons to whom the Software is
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// furnished to do so, subject to the following conditions:
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//
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// The above copyright notice and this permission notice shall be included in all
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// copies or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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// IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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// AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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// LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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// OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
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// SOFTWARE.
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//
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// -----------------------------------------------------------------------
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// -----------------------------------------------------------------------
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using System;
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using System.Collections.Generic;
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using System.IO;
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using System.IO.MemoryMappedFiles;
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using System.Text;
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using System.Threading;
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namespace StgSharp.Script.Express
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{
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public class ExpFileSource : IDisposable, IScriptSourceProvider
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{
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private bool disposedValue;
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private FileStream _expFileStream;
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private int _location;
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private MemoryMappedFile _expMemoryMappedFile;
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private MemoryMappedViewStream _expMemoryMappedStream;
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private SemaphoreSlim readLineSemaphore = new SemaphoreSlim(1, 1);
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private StreamReader _memoryReader;
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public ExpFileSource(string path)
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{
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if (!File.Exists(path)) {
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throw new FileNotFoundException();
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}
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_expFileStream = new FileStream(path, FileMode.Open, FileAccess.Read);
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_expMemoryMappedFile = MemoryMappedFile.CreateFromFile(
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_expFileStream, null, 0, MemoryMappedFileAccess.Read, HandleInheritability.None, true);
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_expMemoryMappedStream = _expMemoryMappedFile.CreateViewStream(
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offset:0, size:0, access:MemoryMappedFileAccess.Read);
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_memoryReader = new StreamReader(_expMemoryMappedStream);
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}
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public bool IsEmpty => _memoryReader.EndOfStream;
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public int Location => _location;
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// ~ExpFileSource()
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// {
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// Dispose(disposing: false);
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// }
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public void Dispose()
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{
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Dispose(disposing:true);
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GC.SuppressFinalize(this);
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}
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public void EndWriting() { }
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public string ReadLine()
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{
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readLineSemaphore.Wait();
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string line = _memoryReader.ReadLine()!;
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_location++;
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readLineSemaphore.Release();
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return line;
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}
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public string ReadLine(out int position)
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{
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throw new NotImplementedException();
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}
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public void ResetToBegin()
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{
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readLineSemaphore.Wait();
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_expMemoryMappedStream.Seek(0, SeekOrigin.Begin);
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_location = 0;
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readLineSemaphore.Release();
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}
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protected virtual void Dispose(bool disposing)
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{
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if (!disposedValue)
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{
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if (disposing)
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{
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_expFileStream.Dispose();
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_expMemoryMappedFile.Dispose();
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_expMemoryMappedStream.Dispose();
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_memoryReader.Dispose();
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}
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disposedValue = true;
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}
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}
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IScriptSourceProvider IScriptSourceProvider.Slice(int location, int count)
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{
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throw new NotSupportedException();
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}
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}
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}
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