104 lines
3.8 KiB
C#
104 lines
3.8 KiB
C#
using System;
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using System.Collections.Generic;
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using System.IO;
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using System.Text;
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using RobloxFiles.BinaryFormat.Chunks;
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namespace RobloxFiles.BinaryFormat
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{
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public class BinaryRobloxFile : IRobloxFile
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{
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// Header Specific
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public const string MagicHeader = "<roblox!\x89\xff\x0d\x0a\x1a\x0a";
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public ushort Version;
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public uint NumTypes;
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public uint NumInstances;
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public byte[] Reserved;
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// IRobloxFile
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internal readonly Instance BinContents = new Instance("Folder", "BinaryRobloxFile");
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public Instance Contents => BinContents;
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// Runtime Specific
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public List<BinaryRobloxChunk> Chunks = new List<BinaryRobloxChunk>();
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public override string ToString() => GetType().Name;
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public Instance[] Instances;
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public INST[] Types;
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public Dictionary<string, string> Metadata;
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public Dictionary<uint, string> SharedStrings;
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public void ReadFile(byte[] contents)
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{
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using (MemoryStream file = new MemoryStream(contents))
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using (BinaryRobloxReader reader = new BinaryRobloxReader(file))
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{
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// Verify the signature of the file.
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byte[] binSignature = reader.ReadBytes(14);
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string signature = Encoding.UTF7.GetString(binSignature);
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if (signature != MagicHeader)
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throw new InvalidDataException("Provided file's signature does not match BinaryRobloxFile.MagicHeader!");
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// Read header data.
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Version = reader.ReadUInt16();
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NumTypes = reader.ReadUInt32();
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NumInstances = reader.ReadUInt32();
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Reserved = reader.ReadBytes(8);
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// Begin reading the file chunks.
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bool reading = true;
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Types = new INST[NumTypes];
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Instances = new Instance[NumInstances];
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while (reading)
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{
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try
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{
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BinaryRobloxChunk chunk = new BinaryRobloxChunk(reader);
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Chunks.Add(chunk);
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switch (chunk.ChunkType)
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{
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case "INST":
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INST type = new INST(chunk);
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type.Allocate(this);
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break;
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case "PROP":
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PROP prop = new PROP(chunk);
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prop.ReadProperties(this);
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break;
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case "PRNT":
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PRNT hierarchy = new PRNT(chunk);
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hierarchy.Assemble(this);
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break;
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case "META":
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META meta = new META(chunk);
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Metadata = meta.Data;
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break;
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case "SSTR":
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SSTR shared = new SSTR(chunk);
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SharedStrings = shared.Strings;
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break;
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case "END\0":
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reading = false;
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break;
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default:
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Console.WriteLine("Unhandled chunk type: {0}!", chunk.ChunkType);
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Chunks.Remove(chunk);
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break;
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}
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}
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catch (EndOfStreamException)
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{
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throw new Exception("Unexpected end of file!");
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}
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}
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}
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}
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}
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} |