AssetPathHelper.cs

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using System;
using System.IO;
 
namespace ReLogic.Content;
 
public static class AssetPathHelper
{
    public static string CleanPath(string path)
    {
        path = path.Replace("/", "\\", StringComparison.Ordinal);
        path = path.Replace("\\.\\", "\\", StringComparison.Ordinal);
        while (path.StartsWith(".\\", StringComparison.Ordinal))
        {
            path = path.Substring(".\\".Length);
        }
        while (path.EndsWith("\\.", StringComparison.Ordinal))
        {
            path = ((path.Length <= "\\.".Length) ? "\\" : path.Substring(0, path.Length - "\\.".Length));
        }
        int num;
        for (num = 1; num < path.Length; num = CollapseParentDirectory(ref path, num, "\\..\\".Length))
        {
            num = path.IndexOf("\\..\\", num, StringComparison.Ordinal);
            if (num < 0)
            {
                break;
            }
        }
        if (path.EndsWith("\\..", StringComparison.Ordinal))
        {
            int num2 = path.Length - "\\..".Length;
            if (num2 > 0)
            {
                CollapseParentDirectory(ref path, num2, "\\..".Length);
            }
        }
        if (path == ".")
        {
            path = string.Empty;
        }
        if (Path.DirectorySeparatorChar != '\\')
        {
            path = path.Replace("\\", Path.DirectorySeparatorChar.ToString(), StringComparison.Ordinal);
        }
        return path;
    }
 
    private static int CollapseParentDirectory(ref string path, int position, int removeLength)
    {
        int num = path.LastIndexOf("\\", position - 1, StringComparison.Ordinal) + 1;
        path = path.Remove(num, position - num + removeLength);
        return Math.Max(num - 1, 1);
    }
}