//-----------------------------------------------------------------------
// -----------------------------------------------------------------------
// file="StepReader.DataSectionReader"
// 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 StgSharp.Model.Step;
using StgSharp.Model.Step;
using StgSharp.Script;

using System;
using System.Collections.Concurrent;
using System.Collections.Generic;
using System.Diagnostics.CodeAnalysis;
using System.IO;
using System.IO.MemoryMappedFiles;
using System.Text;
using System.Text.RegularExpressions;
using System.Threading;
using System.Threading.Tasks;

namespace StgSharp.Model.Step
{
    public partial class StepReader
    {

        public StepDataSectionTransmitter DataTransmitter { get; } = new StepDataSectionTransmitter(
            );

        internal async void ReadDataSection()
        {
            using (MemoryMappedViewStream ms = _memoryFile.CreateViewStream(
                0, _size, MemoryMappedFileAccess.Read))
            {
                StreamReader sr = new StreamReader(ms);
                ms.Position = _dataStart;
                DataTransmitter.Begin = _dataBeginLine;
                string line;
                while (!string.IsNullOrEmpty(line = sr.ReadLine()!)) {
                    DataTransmitter.WriteLine(line);
                }
                sr.Dispose();
            }
        }

        [GeneratedRegex(
                @"^#(?<id>[0-9]+)\s*?=\s*?(?<expression>\S.*?)\s*;$",
                RegexOptions.Compiled | RegexOptions.Singleline)]
        private static partial Regex GetExpressionSplitter();

    }
}