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Some formatting and naming changes, splitting files and some minor improvements.

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This commit is contained in:
Ottermandias 2023-02-23 14:48:46 +01:00
parent 1e471551d4
commit a2b62a8b6a
13 changed files with 928 additions and 997 deletions
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79
Penumbra.GameData/Files/ShpkFile.StringPool.cs Normal file
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using System;
using System.Collections.Generic;
using System.IO;
using System.Text;
namespace Penumbra.GameData.Files;
public partial class ShpkFile
{
public class StringPool
{
public MemoryStream Data;
public List<int> StartingOffsets;
public StringPool(ReadOnlySpan<byte> bytes)
{
Data = new MemoryStream();
Data.Write(bytes);
StartingOffsets = new List<int>
{
0,
};
for (var i = 0; i < bytes.Length; ++i)
{
if (bytes[i] == 0)
StartingOffsets.Add(i + 1);
}
if (StartingOffsets[^1] == bytes.Length)
StartingOffsets.RemoveAt(StartingOffsets.Count - 1);
else
Data.WriteByte(0);
}
public string GetString(int offset, int size)
=> Encoding.UTF8.GetString(Data.GetBuffer().AsSpan().Slice(offset, size));
public string GetNullTerminatedString(int offset)
{
var str = Data.GetBuffer().AsSpan()[offset..];
var size = str.IndexOf((byte)0);
if (size >= 0)
str = str[..size];
return Encoding.UTF8.GetString(str);
}
public (int, int) FindOrAddString(string str)
{
var dataSpan = Data.GetBuffer().AsSpan();
var bytes = Encoding.UTF8.GetBytes(str);
foreach (var offset in StartingOffsets)
{
if (offset + bytes.Length > Data.Length)
break;
var strSpan = dataSpan[offset..];
var match = true;
for (var i = 0; i < bytes.Length; ++i)
{
if (strSpan[i] != bytes[i])
{
match = false;
break;
}
}
if (match && strSpan[bytes.Length] == 0)
return (offset, bytes.Length);
}
Data.Seek(0L, SeekOrigin.End);
var newOffset = (int)Data.Position;
StartingOffsets.Add(newOffset);
Data.Write(bytes);
Data.WriteByte(0);
return (newOffset, bytes.Length);
}
}
}