改了一亿个东西，修了一亿个 BUG

2021-10-19 17:42:18 +02:00
parent 5b907309e0
commit 888ddce4ef
40 changed files with 1870 additions and 1715 deletions
--- a/ReplayFile/ReplayFooter.cs
+++ b/ReplayFile/ReplayFooter.cs
@@ -0,0 +1,90 @@
+using System;
+using System.Collections.Generic;
+using System.IO;
+using System.Linq;
+using System.Text;
+
+namespace AnotherReplayReader.ReplayFile
+{
+    internal enum ReplayFooterOption
+    {
+        SeekToFooter,
+        CurrentlyAtFooter,
+    }
+
+    internal sealed class ReplayFooter
+    {
+        public const uint Terminator = 0x7FFFFFFF;
+        public static readonly byte[] FooterString = Encoding.ASCII.GetBytes("RA3 REPLAY FOOTER");
+
+        private readonly byte[] _data;
+
+        public uint FinalTimeCode { get; }
+        public TimeSpan ReplayLength => TimeSpan.FromSeconds(FinalTimeCode / 15.0);
+
+        public ReplayFooter(BinaryReader reader, ReplayFooterOption option)
+        {
+            var currentPosition = reader.BaseStream.Position;
+            reader.BaseStream.Seek(-4, SeekOrigin.End);
+            var footerLength = reader.ReadInt32();
+
+            if (option == ReplayFooterOption.SeekToFooter)
+            {
+                currentPosition = reader.BaseStream.Length - footerLength;
+            }
+
+            reader.BaseStream.Seek(currentPosition, SeekOrigin.Begin);
+            var footer = reader.ReadBytes(footerLength);
+
+            if (footer.Length != footerLength || reader.BaseStream.Position != reader.BaseStream.Length)
+            {
+                throw new InvalidDataException("Invalid footer");
+            }
+
+            using var footerStream = new MemoryStream(footer);
+            using var footerReader = new BinaryReader(footerStream);
+            var footerString = footerReader.ReadBytes(17);
+            if (!footerString.SequenceEqual(FooterString))
+            {
+                throw new InvalidDataException("Invalid footer, no footer string");
+            }
+            FinalTimeCode = footerReader.ReadUInt32();
+            _data = footerReader.ReadBytes(footer.Length - 25);
+            if (footerReader.ReadInt32() != footerLength)
+            {
+                throw new InvalidDataException();
+            }
+        }
+
+        public ReplayFooter(uint finalTimeCode)
+        {
+            FinalTimeCode = finalTimeCode;
+            _data = new byte[] { 0x02, 0x1A, 0x00, 0x00, 0x00 };
+        }
+
+        List<float>? TryGetKillDeathRatio()
+        {
+            if (_data.Length < 24)
+            {
+                return null;
+            }
+
+            var ratios = new List<float>();
+            using var stream = new MemoryStream(_data, _data.Length - 24, 24);
+            using var reader = new BinaryReader(stream);
+            ratios.Add(reader.ReadSingle());
+            throw new NotImplementedException();
+        }
+
+        public void WriteTo(BinaryWriter writer)
+        {
+            writer.Write(Terminator);
+            writer.Write(FooterString);
+            writer.Write(FinalTimeCode);
+            writer.Write(_data);
+            writer.Write(FooterString.Length + _data.Length + 8);
+        }
+    }
+
+
+}