141 lines
4.8 KiB
C#
141 lines
4.8 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="ScriptSourceTransmitter.cs"
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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
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// obtaining a copy of this software and associated documentation
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// files (the “Software”), to deal in the Software without restriction,
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// including without limitation the rights to use, copy, modify, merge,
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// publish, distribute, sublicense, and/or sell copies of the Software,
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// and to permit persons to whom the Software is furnished to do so,
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// subject to the following conditions:
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//
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// The above copyright notice and
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// this permission notice shall be included in all copies
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// or substantial portions of the Software.
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//
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// THE SOFTWARE IS PROVIDED “AS IS”,
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// WITHOUT WARRANTY OF ANY KIND, EXPRESS OR IMPLIED,
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// INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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// FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.
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// IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM,
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// DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE,
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// ARISING FROM, OUT OF OR IN CONNECTION WITH
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// THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE 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;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Text;
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using System.Text.RegularExpressions;
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namespace StgSharp.Script
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{
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/// <summary>
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/// Transmit a continuous part of script code to interpreter or compiler.
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/// This transmitter is designed for single-thread-write and single-thread
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/// read. Any multi thread operation will cause undefined behaviour.
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/// </summary>
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public class ScriptSourceTransmitter : IScriptSourceProvider
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{
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private bool _isWriting = true;
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private List<string> _cache;
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private string[] _buffer;
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private int _begin, _index;
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private readonly string _completeMark;
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public ScriptSourceTransmitter( string endMark, int start )
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{
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_cache = new List<string>();
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_completeMark = endMark;
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_begin = start;
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_index = 0;
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}
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public ScriptSourceTransmitter(string endMark, int start, int capacity)
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{
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_cache = new List<string>(capacity);
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_completeMark = endMark;
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_begin = start;
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_index = 0;
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}
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internal ScriptSourceTransmitter(string[] buffer, int start)
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{
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_buffer = buffer;
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_begin = start;
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_isWriting = false;
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}
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public bool IsEmpty => _isWriting ?
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(_cache.Count == 0) :
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(_buffer.Length == 0) || (_index >= _buffer.Length - 1);
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public int Location => _begin + _index;
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public bool IsFrozen => !_isWriting;
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public string ReadLine()
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{
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if (_isWriting)
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{
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throw new InvalidOperationException("Cannot read before all writing operation.");
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}
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var str = _buffer[_index];
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_index++;
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return str;
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}
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public string ReadLine(out int position)
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{
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if (_isWriting)
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{
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throw new InvalidOperationException("Cannot read before all writing operation.");
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}
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position = _begin + _index;
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var str = _buffer[_index];
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_index++;
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return str;
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}
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public void WriteLine( string line )
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{
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if( !_isWriting ) {
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return;
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}
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if( string.Equals( _completeMark, line ) ) {
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EndWriting();
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return;
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}
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_cache.Add( line );
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}
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public void EndWriting()
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{
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if (!_isWriting)
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{
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return;
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}
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_isWriting = false;
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_buffer = _cache.ToArray();
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_cache = null!;
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}
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public IScriptSourceProvider Slice(int location, int count)
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{
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ArgumentOutOfRangeException.ThrowIfLessThan(location, _begin);
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ArgumentOutOfRangeException.ThrowIfGreaterThan(
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location + count,_begin + _buffer.Length);
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return new ScriptSourceTransmitter(
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_buffer.AsSpan().Slice( location, count ).ToArray(),
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location);
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}
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}
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}
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