Fix for rooted paths

Author: rds1983

src/AssetManagementBase.csproj

@@ -6,7 +6,7 @@
     <PackageLicenseExpression>MIT</PackageLicenseExpression>
     <PackageProjectUrl>https://github.com/rds1983/AssetManagementBase</PackageProjectUrl>
     <TargetFramework>netstandard2.0</TargetFramework>
-    <Version>0.6.6</Version>
+    <Version>0.6.7</Version>
   </PropertyGroup>
 
   <PropertyGroup Condition="'$(Configuration)'=='Release'">

src/AssetManager.cs

@@ -1,4 +1,5 @@
-using System;
+using AssetManagementBase.Utility;
+using System;
 using System.Collections.Generic;
 using System.IO;
 using System.Reflection;
@@ -96,8 +97,13 @@ public T UseLoader<T>(AssetLoader<T> loader, string assetName, IAssetSettings se
 
 		private string BuildFullPath(string assetName)
 		{
+			var isRooted = assetName.IsPathRooted2();
 			assetName = assetName.Replace('\\', SeparatorSymbol);
-			assetName = CombinePath(_currentFolder, assetName);
+
+			if (!isRooted)
+			{
+				assetName = CombinePath(_currentFolder, assetName);
+			}
 
 			if (assetName.Contains(".."))
 			{
@@ -109,12 +115,10 @@ private string BuildFullPath(string assetName)
 				var partsStack = new List<string>();
 				for(var i = 0; i < parts.Length; i++)
 				{
-					if (parts[i] == "..")
+					if (parts[i] == ".." && partsStack.Count > 0 && 
+							partsStack[partsStack.Count - 1] != ".." && partsStack[partsStack.Count - 1] != ".")
 					{
-						if (partsStack.Count > 0)
-						{
-							partsStack.RemoveAt(partsStack.Count - 1);
-						}
+						partsStack.RemoveAt(partsStack.Count - 1);
 					} else if (!string.IsNullOrEmpty(parts[i]))
 					{
 						partsStack.Add(parts[i]);

src/FileAssetAccessor.cs

@@ -1,4 +1,5 @@
-using System;
+using AssetManagementBase.Utility;
+using System;
 using System.IO;
 
 namespace AssetManagementBase
@@ -41,6 +42,11 @@ private string BuildFullPath(string assetName)
 				assetName = assetName.Replace(AssetManager.SeparatorSymbol, Path.DirectorySeparatorChar);
 			}
 
+			if (assetName.IsPathRooted2())
+			{
+				return assetName;
+			}
+
 			// Asset name should always have directory separator at the start
 			// While base folder shouldnt
 			// Hence such combine should work

src/Utility/PathUtils.cs

@@ -0,0 +1,14 @@
+using System.IO;
+
+namespace AssetManagementBase.Utility
+{
+	internal static class PathUtils
+	{
+		public static bool IsPathRooted2(this string path)
+		{
+			var drive = Path.GetPathRoot(path);
+
+			return !string.IsNullOrEmpty(drive) && drive[0] != '/' && drive[0] != '\\';
+		}
+	}
+}