add from giga-device, new branch added

2025-08-21 16:51:25 +08:00
commit 43bbc06bbb
1296 changed files with 264186 additions and 0 deletions
@@ -0,0 +1,126 @@
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+//     file="ExpSource.cs"
+//     Project: StgSharp
+//     AuthorGroup: Nitload Space
+//     Copyright (c) Nitload Space. All rights reserved.
+//     
+//     Permission is hereby granted, free of charge, to any person 
+//     obtaining a copy of this software and associated documentation 
+//     files (the “Software”), to deal in the Software without restriction, 
+//     including without limitation the rights to use, copy, modify, merge,
+//     publish, distribute, sublicense, and/or sell copies of the Software, 
+//     and to permit persons to whom the Software is furnished to do so, 
+//     subject to the following conditions:
+//     
+//     The above copyright notice and 
+//     this permission notice shall be included in all copies 
+//     or substantial portions of the Software.
+//     
+//     THE SOFTWARE IS PROVIDED “AS IS”, 
+//     WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED, 
+//     INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, 
+//     FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. 
+//     IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, 
+//     DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, 
+//     ARISING FROM, OUT OF OR IN CONNECTION WITH 
+//     THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+//     
+//-----------------------------------------------------------------------
+//-----------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.IO.MemoryMappedFiles;
+using System.Text;
+using System.Threading;
+
+namespace StgSharp.Script.Express
+{
+    public class ExpFileSource : IDisposable, IScriptSourceProvider
+    {
+
+        private bool disposedValue;
+        private FileStream _expFileStream;
+        private int _location;
+        private MemoryMappedFile _expMemoryMappedFile;
+        private MemoryMappedViewStream _expMemoryMappedStream;
+
+        private SemaphoreSlim readLineSemaphore = new SemaphoreSlim( 1, 1 );
+        private StreamReader _memoryReader;
+
+        public ExpFileSource( string path )
+        {
+            if( !File.Exists( path ) ) {
+                throw new FileNotFoundException();
+            }
+            _expFileStream = new FileStream( path, FileMode.Open, FileAccess.Read );
+            _expMemoryMappedFile = MemoryMappedFile.CreateFromFile(
+                _expFileStream, null, 0, MemoryMappedFileAccess.Read, HandleInheritability.None,
+                true );
+            _expMemoryMappedStream = _expMemoryMappedFile.CreateViewStream(
+                offset: 0, size: 0, access: MemoryMappedFileAccess.Read );
+            _memoryReader = new StreamReader( _expMemoryMappedStream );
+        }
+
+        public bool IsEmpty => _memoryReader.EndOfStream;
+
+        public int Location => _location;
+
+        // ~ExpFileSource()
+        // {
+        //     Dispose(disposing: false);
+        // }
+
+        public void Dispose()
+        {
+            Dispose( disposing: true );
+            GC.SuppressFinalize( this );
+        }
+
+        public void EndWriting() { }
+
+        public string ReadLine()
+        {
+            readLineSemaphore.Wait();
+            string line = _memoryReader.ReadLine()!;
+            _location++;
+            readLineSemaphore.Release();
+            return line;
+        }
+
+        public string ReadLine( out int position )
+        {
+            throw new NotImplementedException();
+        }
+
+        public void ResetToBegin()
+        {
+            readLineSemaphore.Wait();
+            _expMemoryMappedStream.Seek( 0, SeekOrigin.Begin );
+            _location = 0;
+            readLineSemaphore.Release();
+        }
+
+        protected virtual void Dispose( bool disposing )
+        {
+            if( !disposedValue )
+            {
+                if( disposing )
+                {
+                    _expFileStream.Dispose();
+                    _expMemoryMappedFile.Dispose();
+                    _expMemoryMappedStream.Dispose();
+                    _memoryReader.Dispose();
+                }
+                disposedValue = true;
+            }
+        }
+
+        IScriptSourceProvider IScriptSourceProvider.Slice( int location, int count )
+        {
+            throw new NotSupportedException();
+        }
+
+    }
+}