144 lines
5.3 KiB
C#
144 lines
5.3 KiB
C#
//-----------------------------------------------------------------------
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//-----------------------------------------------------------------------
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// file="StepDataSectionTokenReader.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 StgSharp.Modeling.Step;
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using StgSharp.Script;
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using StgSharp.Script.Express;
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using System;
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using System.Collections.Concurrent;
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using System.Collections.Generic;
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using System.Linq;
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using System.Text;
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using System.Threading.Tasks;
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namespace StgSharp.Modeling.Step
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{
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public class StepDataSectionTokenReader : IScriptTokenReader
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{
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private ExpSourceReader _reader;
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private Queue<Token> _cache = new Queue<Token>();
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private StepDataSectionTransmitter _transmitter;
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public StepDataSectionTokenReader( StepDataSectionTransmitter transmitter )
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{
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_reader = new ExpSourceReader( transmitter );
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_transmitter = transmitter;
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}
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public Token ReadToken()
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{
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if( _cache.Count == 0 )
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{
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if( _reader.TryReadToken( out Token token0 ) && ( token0.Value != "." ) ) {
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return token0;
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}
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if( _reader.TryReadToken( out Token token1 ) && ( token1.Value != "T" || token1.Value !=
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"F" ) )
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{
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_cache.Enqueue( token1 );
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return token0;
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}
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if( _reader.TryReadToken( out Token token2 ) && ( token2.Value != "." ) )
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{
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_cache.Enqueue( token1 );
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_cache.Enqueue( token2 );
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return token0;
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}
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switch( token1.Value )
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{
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case "T":
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return new Token( ".T.", token0.Line, token1.Column, TokenFlag.Member );
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case "F":
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return new Token( ".F.", token0.Line, token1.Column, TokenFlag.Member );
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default:
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break;
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}
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}
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return _cache.Dequeue();
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}
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public bool TryReadToken( out Token t )
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{
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if( _cache.Count == 0 )
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{
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if( _reader.TryReadToken( out Token token0 ) )
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{
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if( token0.Value != "." )
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{
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t = token0;
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return true;
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}
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} else
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{
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t = Token.Empty;
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return false;
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}
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if( _reader.TryReadToken( out Token token1 ) )
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{
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if( token1.Value != "T" || token1.Value != "F" )
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{
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_cache.Enqueue( token1 );
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t = token0;
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return true;
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}
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} else
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{
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t = Token.Empty;
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return false;
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}
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if( _reader.TryReadToken( out Token token2 ) )
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{
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if( token2.Value != "." )
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{
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_cache.Enqueue( token1 );
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_cache.Enqueue( token2 );
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t = token0;
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return true;
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}
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} else
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{
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t = Token.Empty;
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return false;
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}
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t = token1.Value switch
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{
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"T" => new Token( ".T.", token0.Line, token1.Column, TokenFlag.Member ),
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"F" => new Token( ".F.", token0.Line, token1.Column, TokenFlag.Member ),
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_ => Token.Empty
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};
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}
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return _reader.TryReadToken( out t );
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}
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}
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}
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