Added EnumHelper and DynamicEnum GetFlags

CHANGELOG.md

@@ -14,6 +14,7 @@ Jump to version:
 ### MLEM
 Additions
 - Added TokenizedString.Realign
+- Added EnumHelper.GetFlags
 - **Added the ability to find paths to one of multiple goals using AStar**
 
 Improvements
@@ -59,6 +60,7 @@ Fixes
 Additions
 - Added data, from, and copy instructions to DataTextureAtlas
 - Added the ability to add additional regions to a RuntimeTexturePacker after packing
+- Added DynamicEnum.GetFlags
 
 Improvements
 - Allow data texture atlas pivots and offsets to be negative

MLEM.Data/DynamicEnum.cs

@@ -174,6 +174,21 @@ namespace MLEM.Data {
             return DynamicEnum.GetStorage(type).Values.Values;
         }
 
+        /// <summary>
+        /// Returns all of the defined values from the given dynamic enum type <typeparamref name="T"/> which are contained in <paramref name="combinedFlag"/>.
+        /// Note that, if combined flags are defined in <typeparamref name="T"/>, and <paramref name="combinedFlag"/> contains them, they will also be returned.
+        /// </summary>
+        /// <param name="combinedFlag">The combined flags whose individual flags to return.</param>
+        /// <param name="includeZero">Whether the enum value 0 should also be returned, if <typeparamref name="T"/> contains one.</param>
+        /// <typeparam name="T">The type of enum.</typeparam>
+        /// <returns>All of the flags that make up <paramref name="combinedFlag"/>.</returns>
+        public static IEnumerable<T> GetFlags<T>(T combinedFlag, bool includeZero = true) where T : DynamicEnum {
+            foreach (var flag in DynamicEnum.GetValues<T>()) {
+                if (combinedFlag.HasFlag(flag) && (includeZero || DynamicEnum.GetValue(flag) != BigInteger.Zero))
+                    yield return flag;
+            }
+        }
+
         /// <summary>
         /// Returns the bitwise OR (|) combination of the two dynamic enum values
         /// </summary>

MLEM/Misc/EnumHelper.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Collections.Generic;
 using Microsoft.Xna.Framework.Input;
 
 namespace MLEM.Misc {
@@ -30,5 +31,20 @@ namespace MLEM.Misc {
             #endif
         }
 
+        /// <summary>
+        /// Returns all of the defined values from the given enum type <typeparamref name="T"/> which are contained in <paramref name="combinedFlag"/>.
+        /// Note that, if combined flags are defined in <typeparamref name="T"/>, and <paramref name="combinedFlag"/> contains them, they will also be returned.
+        /// </summary>
+        /// <param name="combinedFlag">The combined flags whose individual flags to return.</param>
+        /// <param name="includeZero">Whether the enum value 0 should also be returned, if <typeparamref name="T"/> contains one.</param>
+        /// <typeparam name="T">The type of enum.</typeparam>
+        /// <returns>All of the flags that make up <paramref name="combinedFlag"/>.</returns>
+        public static IEnumerable<T> GetFlags<T>(T combinedFlag, bool includeZero = true) where T : struct, Enum {
+            foreach (var flag in EnumHelper.GetValues<T>()) {
+                if (combinedFlag.HasFlag(flag) && (includeZero || Convert.ToInt64(flag) != 0))
+                    yield return flag;
+            }
+        }
+
     }
 }