A load more work on FFI

PkmnLibRSharp/DynamicData/Libraries/BattleStatCalculator.cs

@@ -6,7 +6,7 @@ namespace PkmnLibSharp.DynamicData.Libraries
 {
     public abstract class BattleStatCalculator : ExternPointer<object>
     {
-        public BattleStatCalculator(IdentifiablePointer ptr, bool isOwner) : base(ptr, isOwner){}
+        protected BattleStatCalculator(IdentifiablePointer ptr, bool isOwner) : base(ptr, isOwner){}
 
         protected override object CreateCache() => new();
 

PkmnLibRSharp/DynamicData/Libraries/DynamicLibrary.cs

@@ -7,18 +7,27 @@ namespace PkmnLibSharp.DynamicData.Libraries
     public class DynamicLibrary : ExternPointer<DynamicLibrary.CacheData>
     {
         public class CacheData
+        {
+            public StaticData.Libraries.StaticData? StaticData { get; internal set; }
+        }
+
+        internal DynamicLibrary(IdentifiablePointer ptr) : base(ptr, false)
         {
         }
-        
-        internal DynamicLibrary(IdentifiablePointer ptr) : base(ptr, false) {}
 
         public DynamicLibrary(StaticData.Libraries.StaticData staticData, BattleStatCalculator statCalculator,
             DamageLibrary damageLibrary, MiscLibrary miscLibrary, ScriptResolver scriptResolver) : base(
-            Interface.dynamic_library_new(staticData.Ptr, statCalculator.Ptr, damageLibrary.Ptr, miscLibrary.Ptr,
-                scriptResolver.Ptr), true)
+            Interface.dynamic_library_new(staticData.TakeOwnershipAndInvalidate(),
+                statCalculator.TakeOwnershipAndInvalidate(), damageLibrary.TakeOwnershipAndInvalidate(),
+                miscLibrary.TakeOwnershipAndInvalidate(), scriptResolver.TakeOwnershipAndInvalidate()), true)
         {
         }
 
+        public StaticData.Libraries.StaticData StaticData =>
+            Cache.StaticData ??=
+                new StaticData.Libraries.StaticData(Interface.dynamic_library_get_static_data(Ptr), false);
+
+
         protected override CacheData CreateCache() => new();
         protected override void Destructor() => Interface.dynamic_library_drop(Ptr);
     }

PkmnLibRSharp/DynamicData/PokemonBuilder.cs

@@ -0,0 +1,165 @@
+using System;
+using System.Collections.Generic;
+using PkmnLibSharp.DynamicData.Libraries;
+using PkmnLibSharp.StaticData;
+using PkmnLibSharp.Utils;
+
+namespace PkmnLibSharp.DynamicData
+{
+    public class PokemonBuilder 
+    {
+        private static readonly Random DefaultRandom = new();
+
+        private readonly Random _random;
+        private readonly int _randomSeed;
+
+        private readonly DynamicLibrary _library;
+        private readonly string _species;
+        private string _form = "default";
+        private readonly LevelInt _level;
+        private bool? _forceShininess;
+        private Gender? _gender;
+        private uint? _identifier;
+        private string? _natureName;
+        private string? _ability;
+        private uint? _experience;
+        private readonly List<(string name, MoveLearnMethod method)> _moves = new();
+
+        private bool _hiddenAbility;
+        private byte _abilityIndex;
+        private byte _coloring;
+
+        public PokemonBuilder(DynamicLibrary library, string species, LevelInt level)
+        {
+            _library = library;
+            _species = species;
+            _level = level;
+            _randomSeed = DefaultRandom.Next();
+            _random = new Random(_randomSeed);
+        }
+        
+        public PokemonBuilder WithForm(string form)
+        {
+            _form = form;
+            return this;
+        }
+        
+        public PokemonBuilder ForceShiny(bool value)
+        {
+            _forceShininess = value;
+            return this;
+        }
+
+        public PokemonBuilder WithGender(Gender gender)
+        {
+            _gender = gender;
+            return this;
+        }
+        
+        public PokemonBuilder WithIdentifier(uint identifier)
+        {
+            _identifier = identifier;
+            return this;
+        }
+        
+        public PokemonBuilder WithNature(string nature)
+        {
+            _natureName = nature;
+            return this;
+        }
+        
+        public PokemonBuilder WithAbility(string ability)
+        {
+            _ability = ability;
+            return this;
+        }
+        
+        public PokemonBuilder WithExperience(uint experience)
+        {
+            _experience = experience;
+            return this;
+        }
+        
+        public PokemonBuilder LearnMove(string moveName, MoveLearnMethod learnMethod)
+        {
+            _moves.Add((moveName, learnMethod));
+            return this;
+        }
+
+        protected virtual Pokemon Finalize(Species species, Form form, Item? heldItem)
+        {
+            var pokemon = new Pokemon(_library, species, form, _hiddenAbility, _abilityIndex, _level,
+                _identifier ?? (uint)_random.Next(), _gender!.Value, _coloring, _natureName!);
+            if (heldItem != null)
+                pokemon.SetHeldItem(heldItem);
+            foreach (var move in _moves)
+            {
+                pokemon.LearnMove(move.name, move.method);
+            }
+
+            return pokemon;
+        }
+
+        protected virtual void PopulateUninitialized(Species species, Form form, Random random)
+        {
+            _experience ??= _library.StaticData.GrowthRateLibrary.CalculateExperience(species.GrowthRate, _level);
+            _identifier ??= (uint)random.Next();
+            _gender ??= species.GetRandomGender((ulong)_randomSeed);
+            if (_forceShininess.HasValue)
+            {
+                _coloring = _forceShininess.Value ? (byte)1 : (byte)0;
+            }
+            else if (random.Next((int)_library.StaticData.LibrarySettings.ShinyRate) == 0)
+            {
+                _coloring = 1;
+            }
+
+            if (string.IsNullOrEmpty(_ability))
+            {
+                _hiddenAbility = false;
+                _abilityIndex = (byte)_random.Next(0, form.Abilities.Count);
+            }
+            else
+            {
+                (_hiddenAbility, _abilityIndex) = GetAbilityIndex(species, form, _ability!);
+            }
+            
+            if (string.IsNullOrEmpty(_natureName))
+            {
+                using var nature = _library.StaticData.NatureLibrary.GetRandomNature((ulong)_randomSeed);
+                _natureName = _library.StaticData.NatureLibrary.GetNatureName(nature);
+            }
+        }
+
+        private static (bool, byte) GetAbilityIndex(Species species, Form form, string ability)
+        {
+            var i = form.Abilities.IndexOf(ability);
+            if (i != -1) 
+                return (false, (byte)i);
+            i = form.HiddenAbilities.IndexOf(ability);
+            if (i == -1)
+            {
+                throw new Exception(
+                    $"Invalid ability '{ability}' for Pokemon '{species.Name}' and forme '{form.Name}'.");
+            }
+
+            return (true, (byte)i);
+        }
+
+        public Pokemon Build()
+        {
+            if (!_library.StaticData.SpeciesLibrary.TryGetValue(_species, out var species))
+            {
+                throw new Exception($"Species '{_species}' was not found.");
+            }
+            if (!species.TryGetForm(_form, out var form))
+            {
+                throw new Exception($"Forme '{_form}' was not found on species '{_species}'");
+            }
+            
+            PopulateUninitialized(species, form, _random);
+
+            return Finalize(species, form, null);
+        }
+    }
+}

PkmnLibRSharp/FFI/DynamicData/Libraries/DynamicLibrary.cs

@@ -18,5 +18,11 @@ namespace PkmnLibSharp.FFI.DynamicData.Libraries
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
         internal static extern void dynamic_library_drop(IntPtr dynamicLibrary);
 
+        /// <summary>
+        /// The static data is the immutable storage data for this library.
+        /// </summary>
+        [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
+        internal static extern IdentifiablePointer dynamic_library_get_static_data(IntPtr dynamicLibrary);
+
     }
 }

PkmnLibRSharp/FFI/StaticData/Libraries/LibrarySettings.cs

@@ -7,12 +7,16 @@ namespace PkmnLibSharp.FFI.StaticData.Libraries
     internal static class LibrarySettings
     {
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
-        internal static extern IdentifiablePointer library_settings_new(LevelInt maxLevel);
+        internal static extern IdentifiablePointer library_settings_new(LevelInt maxLevel, uint shinyRate);
         
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
         internal static extern void library_settings_drop(IntPtr ptr);
 
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
         internal static extern LevelInt library_settings_maximum_level(IntPtr ptr);
+        
+        [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
+        internal static extern uint library_settings_shiny_rate(IntPtr ptr);
+
     }
 }

PkmnLibRSharp/FFI/StaticData/Libraries/NatureLibrary.cs

@@ -17,6 +17,9 @@ namespace PkmnLibSharp.FFI.StaticData.Libraries
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
         internal static extern IdentifiablePointer nature_library_get_nature(IntPtr ptr, IntPtr name);
 
+        [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
+        internal static extern IdentifiablePointer nature_library_get_random_nature(IntPtr ptr, ulong seed);
+
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl, CharSet = CharSet.Ansi)]
         internal static extern IntPtr nature_library_get_nature_name(IntPtr ptr, IntPtr nature);
     }

PkmnLibRSharp/FFI/StaticData/Species.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Runtime.InteropServices;
+using PkmnLibSharp.StaticData;
 
 namespace PkmnLibSharp.FFI.StaticData
 {
@@ -33,5 +34,8 @@ namespace PkmnLibSharp.FFI.StaticData
         [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl)]
         internal static extern IdentifiablePointer species_get_form(IntPtr ptr, IntPtr name);
 
+        [DllImport(Data.DllName, CallingConvention = CallingConvention.Cdecl)]
+        internal static extern Gender species_get_random_gender(IntPtr ptr, ulong seed);
+
     }
 }

PkmnLibRSharp/PkmnLibRSharp.csproj

@@ -1,10 +1,10 @@
 <Project Sdk="Microsoft.NET.Sdk">
 
     <PropertyGroup>
-        <TargetFramework>netstandard2.1</TargetFramework>
         <RootNamespace>PkmnLibSharp</RootNamespace>
         <LangVersion>11</LangVersion>
         <Nullable>enable</Nullable>
+        <TargetFrameworks>netstandard2.0;netstandard2.1</TargetFrameworks>
     </PropertyGroup>
 
     <PropertyGroup Condition=" '$(Configuration)' == 'Debug' ">

PkmnLibRSharp/StaticData/GrowthRate.cs

@@ -1,5 +1,7 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics;
+using System.Runtime.CompilerServices;
 using PkmnLibSharp.Utils;
 using Interface = PkmnLibSharp.FFI.StaticData.GrowthRate;
 
@@ -22,9 +24,10 @@ namespace PkmnLibSharp.StaticData
 
         public uint CalculateExperience(LevelInt level)
         {
+            Debug.Assert(level >= 1);
             return Interface.growth_rate_calculate_experience(Ptr, level);
         }
-        
+
         protected override void Destructor()
         {
             Interface.growth_rate_lookup_drop(Ptr);
@@ -44,10 +47,126 @@ namespace PkmnLibSharp.StaticData
         {
             return new object();
         }
-        
+
         ~LookupGrowthRate()
         {
             Dispose();
         }
     }
+
+    /// <summary>
+    /// A collection of the growth rates that have been used since generation 5.
+    /// </summary>
+    public static class CommonGrowthRates
+    {
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static uint Power2(uint i)
+        {
+            return i * i;
+        }
+
+        [MethodImpl(MethodImplOptions.AggressiveInlining)]
+        private static uint Power3(uint i)
+        {
+            return i * i * i;
+        }
+
+        public static LookupGrowthRate Fast(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            for (uint i = 2; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = 4 * Power3(i) / 5;
+            }
+
+            return new LookupGrowthRate(arr);
+        }
+        
+        public static LookupGrowthRate MediumFast(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            for (uint i = 2; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = Power3(i);
+            }
+
+            return new LookupGrowthRate(arr);
+        }
+        
+        public static LookupGrowthRate MediumSlow(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            for (uint i = 2; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = 6 * Power3(i) / 5 - 15 * Power2(i) + 100 * i - 140;
+            }
+
+            return new LookupGrowthRate(arr);
+        }
+        
+        public static LookupGrowthRate Slow(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            for (uint i = 2; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = 5 * Power3(i) / 4;
+            }
+            return new LookupGrowthRate(arr);
+        }
+
+        public static LookupGrowthRate Erratic(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            uint i = 2;
+            for (; i < 50; i++)
+            {
+                arr[i - 1] = Power3(i) * (100 - i) / 50;
+            }
+
+            for (; i < 68; i++)
+            {
+                arr[i - 1] = Power3(i) * (150 - i) / 100;
+            }
+
+            for (; i < 98; i++)
+            {
+                arr[i - 1] = Power3(i) * (uint)((1911 - 10 * i) / 3.0) / 500;
+            }
+
+            for (; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = Power3(i) * (160 - i) / 100;
+            }
+
+            return new LookupGrowthRate(arr);
+        }
+        
+        public static LookupGrowthRate Fluctuating(LevelInt maxLevel)
+        {
+            var arr = new uint[maxLevel];
+            arr[0] = 0;
+            uint i = 2;
+            for (; i < 15; i++)
+            {
+                arr[i - 1] = Power3(i) * (uint)((Math.Floor((i + 1) / 3.0) + 24) / 50.0);
+            }
+
+            for (; i < 36; i++)
+            {
+                arr[i - 1] = Power3(i) * (i + 14) / 50;
+            }
+
+            for (; i < maxLevel + 1; i++)
+            {
+                arr[i - 1] = Power3(i) * (i / 2 + 32) / 50;
+            }
+
+            return new LookupGrowthRate(arr);
+        }
+    }
 }

PkmnLibRSharp/StaticData/Libraries/DataLibrary.cs

@@ -1,6 +1,7 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using PkmnLibSharp.FFI;
 using PkmnLibSharp.Utils;
@@ -29,7 +30,7 @@ namespace PkmnLibSharp.StaticData.Libraries
             return GetValueByKey(key) != null;
         }
 
-        public bool TryGetValue(string key, out T value)
+        public bool TryGetValue(string key, [NotNullWhen(true)] out T value)
         {
             if (Cache.ValueCache.TryGetValue(key, out value) && value != null)
                 return true;

PkmnLibRSharp/StaticData/Libraries/GrowthRateLibrary.cs

@@ -1,4 +1,5 @@
 using System;
+using System.Diagnostics;
 using JetBrains.Annotations;
 using PkmnLibSharp.FFI;
 using PkmnLibSharp.Utils;
@@ -21,8 +22,11 @@ namespace PkmnLibSharp.StaticData.Libraries
             Interface.growth_rate_library_calculate_level(Ptr, growthRate.ToPtr(), experience);
 
         [MustUseReturnValue]
-        public uint CalculateExperience(string growthRate, LevelInt level) =>
-            Interface.growth_rate_library_calculate_experience(Ptr, growthRate.ToPtr(), level);
+        public uint CalculateExperience(string growthRate, LevelInt level)
+        {
+            Debug.Assert(level >= 1);
+            return Interface.growth_rate_library_calculate_experience(Ptr, growthRate.ToPtr(), level);
+        }
 
         public void AddGrowthRate(string name, GrowthRate growthRate) =>
             Interface.growth_rate_library_add_growth_rate(Ptr, name.ToPtr(), growthRate.TakeOwnershipAndInvalidate());

PkmnLibRSharp/StaticData/Libraries/LibrarySettings.cs

@@ -1,31 +1,53 @@
-using System;
+using System.Diagnostics;
 using PkmnLibSharp.FFI;
 using PkmnLibSharp.Utils;
 using Interface = PkmnLibSharp.FFI.StaticData.Libraries.LibrarySettings;
 
 namespace PkmnLibSharp.StaticData.Libraries
 {
+    /// <summary>
+    /// This library holds several misc settings for the library.
+    /// </summary>
     public class LibrarySettings : ExternPointer<LibrarySettings.CacheData>
     {
         public class CacheData
         {
             public LevelInt? MaxLevel { get; internal set; }
+            public uint? ShinyRate { get; internal set; }
         }
 
-        public LibrarySettings(LevelInt maxLevel) : base(Interface.library_settings_new(maxLevel), true)
+        /// <inheritdoc cref="LibrarySettings"/>
+        /// <param name="maxLevel">The highest level a Pokemon can be.</param>
+        /// <param name="shinyRate">
+        /// The chance of a Pokemon being shiny, as the denominator of a fraction, where the nominator
+        /// is 1. For example, if this is 1000, then the chance of a Pokemon being shiny is 1/1000.
+        /// </param>
+        public LibrarySettings(LevelInt maxLevel, uint shinyRate)
         {
+            Debug.Assert(maxLevel >= 1);
+            Debug.Assert(shinyRate >= 1);
+            InitializePointer(Interface.library_settings_new(maxLevel, shinyRate), true);
         }
 
         internal LibrarySettings(IdentifiablePointer ptr, bool isOwner) : base(ptr, isOwner)
         {
         }
 
+        /// <summary>
+        /// The highest level a Pokemon can be.
+        /// </summary>
         public LevelInt MaxLevel => Cache.MaxLevel ??= Interface.library_settings_maximum_level(Ptr);
 
+        /// <summary>
+        /// The chance of a Pokemon being shiny, as the denominator of a fraction, where the nominator
+        /// is 1. For example, if this is 1000, then the chance of a Pokemon being shiny is 1/1000.
+        /// </summary>
+        public uint ShinyRate => Cache.ShinyRate ??= Interface.library_settings_shiny_rate(Ptr);
+
         protected override CacheData CreateCache() => new();
 
         protected override void Destructor() => Interface.library_settings_drop(Ptr);
-        
+
         ~LibrarySettings()
         {
             Dispose();

PkmnLibRSharp/StaticData/Libraries/NatureLibrary.cs

@@ -33,6 +33,12 @@ namespace PkmnLibSharp.StaticData.Libraries
             Cache.Natures.Add(name, nature);
             return nature;
         }
+        
+        public Nature GetRandomNature(ulong seed)
+        {
+            return new Nature(Interface.nature_library_get_random_nature(Ptr, seed));
+        }
+
 
         public string GetNatureName(Nature nature)
         {

PkmnLibRSharp/StaticData/Libraries/StaticData.cs

@@ -1,4 +1,5 @@
 using JetBrains.Annotations;
+using PkmnLibSharp.FFI;
 using PkmnLibSharp.Utils;
 using Interface = PkmnLibSharp.FFI.StaticData.Libraries.StaticData;
 
@@ -17,6 +18,8 @@ namespace PkmnLibSharp.StaticData.Libraries
             public NatureLibrary? NatureLibrary { get; internal set; }
             public AbilityLibrary? AbilityLibrary { get; internal set; }
         }
+        
+        internal StaticData(IdentifiablePointer ptr, bool isOwner) : base(ptr, isOwner){}
 
         public StaticData(LibrarySettings settings, SpeciesLibrary speciesLibrary, MoveLibrary moveLibrary,
             ItemLibrary itemLibrary, GrowthRateLibrary growthRateLibrary, TypeLibrary typeLibrary,
@@ -42,16 +45,16 @@ namespace PkmnLibSharp.StaticData.Libraries
             Cache.ItemLibrary ??= new ItemLibrary(Interface.static_data_items(Ptr), false);
 
         public GrowthRateLibrary GrowthRateLibrary =>
-            Cache.GrowthRateLibrary ??= new GrowthRateLibrary(Interface.static_data_items(Ptr), false);
+            Cache.GrowthRateLibrary ??= new GrowthRateLibrary(Interface.static_data_growth_rates(Ptr), false);
 
         public TypeLibrary TypeLibrary =>
-            Cache.TypeLibrary ??= new TypeLibrary(Interface.static_data_items(Ptr), false);
+            Cache.TypeLibrary ??= new TypeLibrary(Interface.static_data_types(Ptr), false);
 
         public NatureLibrary NatureLibrary =>
-            Cache.NatureLibrary ??= new NatureLibrary(Interface.static_data_items(Ptr), false);
+            Cache.NatureLibrary ??= new NatureLibrary(Interface.static_data_natures(Ptr), false);
 
         public AbilityLibrary AbilityLibrary =>
-            Cache.AbilityLibrary ??= new AbilityLibrary(Interface.static_data_items(Ptr), false);
+            Cache.AbilityLibrary ??= new AbilityLibrary(Interface.static_data_abilities(Ptr), false);
 
         protected override CacheData CreateCache() => new();
 

PkmnLibRSharp/StaticData/Species.cs

@@ -1,5 +1,6 @@
 using System;
 using System.Collections.Generic;
+using System.Diagnostics.CodeAnalysis;
 using System.Linq;
 using PkmnLibSharp.FFI;
 using PkmnLibSharp.Utils;
@@ -37,8 +38,17 @@ namespace PkmnLibSharp.StaticData
         public float GenderRate => Cache.GenderRate ??= Interface.species_gender_rate(Ptr);
         public string GrowthRate => Cache.GrowthRate ??= Interface.species_growth_rate(Ptr).PtrString()!;
         public byte CaptureRate => Cache.CaptureRate ??= Interface.species_capture_rate(Ptr);
+        
+        public Form DefaultForm
+        {
+            get
+            {
+                TryGetForm("default", out var form);
+                return form!;
+            }
+        }
 
-        public bool TryGetForm(string formName, out Form? form)
+        public bool TryGetForm(string formName, [NotNullWhen(true)] out Form? form)
         {
             if (Cache.Forms.TryGetValue(formName, out form))
                 return true;
@@ -57,6 +67,8 @@ namespace PkmnLibSharp.StaticData
         public void AddForm(Form form) =>
             Interface.species_add_form(Ptr, form.Name.ToPtr(), form.TakeOwnershipAndInvalidate());
 
+        public Gender GetRandomGender(ulong seed) => Interface.species_get_random_gender(Ptr, seed);
+
         protected override CacheData CreateCache() => new CacheData();
         protected override void Destructor() => Interface.species_drop(Ptr);
 

PkmnLibRSharp/Utils/ExternPointer.cs

@@ -94,5 +94,40 @@ namespace PkmnLibSharp.Utils
             _isInvalidated = true;
             GC.SuppressFinalize(this);
         }
+
+        public override bool Equals(object obj)
+        {
+            if (obj is ExternPointer<TCache> other)
+            {
+                return Identifier == other.Identifier;
+            }
+            return false;
+        }
+
+        protected bool Equals(ExternPointer<TCache> other)
+        {
+            if (Identifier != 0)
+            {
+                return Identifier == other.Identifier;
+            }
+            return Ptr == other.Ptr;
+        }
+
+        public override int GetHashCode()
+        {
+            if (Identifier != 0)
+                return (int)Identifier;
+            return (int)Ptr;
+        }
+
+        public static bool operator ==(ExternPointer<TCache>? left, ExternPointer<TCache>? right)
+        {
+            return Equals(left, right);
+        }
+
+        public static bool operator !=(ExternPointer<TCache>? left, ExternPointer<TCache>? right)
+        {
+            return !Equals(left, right);
+        }
     }
 }

PkmnLibRSharp/Utils/MiscExtensions.cs

@@ -0,0 +1,20 @@
+using System.Collections.Generic;
+
+namespace PkmnLibSharp.Utils
+{
+    internal static class MiscExtensions
+    {
+        internal static int IndexOf<T>(this IReadOnlyList<T> list, T element)
+        {
+            for (int i = 0; i < list.Count; i++)
+            {
+                if (Equals(list[i], element))
+                {
+                    return i;
+                }
+            }
+
+            return -1;
+        }
+    }
+}

PkmnLibRSharp/Utils/NetStandardCompat.cs

@@ -0,0 +1,208 @@
+// https://github.com/dotnet/runtime/blob/527f9ae88a0ee216b44d556f9bdc84037fe0ebda/src/libraries/System.Private.CoreLib/src/System/Diagnostics/CodeAnalysis/NullableAttributes.cs
+
+#pragma warning disable
+#define INTERNAL_NULLABLE_ATTRIBUTES
+
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+
+namespace System.Diagnostics.CodeAnalysis
+{
+#if NETSTANDARD2_0 ||  NETCOREAPP2_0 ||  NETCOREAPP2_1 ||  NETCOREAPP2_2 || NET45 || NET451 || NET452 || NET46 || NET461 || NET462 || NET47 || NET471 || NET472 || NET48
+    /// <summary>Specifies that null is allowed as an input even if the corresponding type disallows it.</summary>
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.Property, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class AllowNullAttribute : Attribute
+    { }
+
+    /// <summary>Specifies that null is disallowed as an input even if the corresponding type allows it.</summary>
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.Property, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class DisallowNullAttribute : Attribute
+    { }
+
+    /// <summary>Specifies that an output may be null even if the corresponding type disallows it.</summary>
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class MaybeNullAttribute : Attribute
+    { }
+
+    /// <summary>Specifies that an output will not be null even if the corresponding type allows it. Specifies that an input argument was not null when the call returns.</summary>
+    [AttributeUsage(AttributeTargets.Field | AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class NotNullAttribute : Attribute
+    { }
+
+    /// <summary>Specifies that when a method returns <see cref="ReturnValue"/>, the parameter may be null even if the corresponding type disallows it.</summary>
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class MaybeNullWhenAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with the specified return value condition.</summary>
+        /// <param name="returnValue">
+        /// The return value condition. If the method returns this value, the associated parameter may be null.
+        /// </param>
+        public MaybeNullWhenAttribute(bool returnValue) => ReturnValue = returnValue;
+
+        /// <summary>Gets the return value condition.</summary>
+        public bool ReturnValue { get; }
+    }
+
+    /// <summary>Specifies that when a method returns <see cref="ReturnValue"/>, the parameter will not be null even if the corresponding type allows it.</summary>
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class NotNullWhenAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with the specified return value condition.</summary>
+        /// <param name="returnValue">
+        /// The return value condition. If the method returns this value, the associated parameter will not be null.
+        /// </param>
+        public NotNullWhenAttribute(bool returnValue) => ReturnValue = returnValue;
+
+        /// <summary>Gets the return value condition.</summary>
+        public bool ReturnValue { get; }
+    }
+
+    /// <summary>Specifies that the output will be non-null if the named parameter is non-null.</summary>
+    [AttributeUsage(AttributeTargets.Parameter | AttributeTargets.Property | AttributeTargets.ReturnValue, AllowMultiple = true, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class NotNullIfNotNullAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with the associated parameter name.</summary>
+        /// <param name="parameterName">
+        /// The associated parameter name.  The output will be non-null if the argument to the parameter specified is non-null.
+        /// </param>
+        public NotNullIfNotNullAttribute(string parameterName) => ParameterName = parameterName;
+
+        /// <summary>Gets the associated parameter name.</summary>
+        public string ParameterName { get; }
+    }
+
+    /// <summary>Applied to a method that will never return under any circumstance.</summary>
+    [AttributeUsage(AttributeTargets.Method, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class DoesNotReturnAttribute : Attribute
+    { }
+
+    /// <summary>Specifies that the method will not return if the associated Boolean parameter is passed the specified value.</summary>
+    [AttributeUsage(AttributeTargets.Parameter, Inherited = false)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class DoesNotReturnIfAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with the specified parameter value.</summary>
+        /// <param name="parameterValue">
+        /// The condition parameter value. Code after the method will be considered unreachable by diagnostics if the argument to
+        /// the associated parameter matches this value.
+        /// </param>
+        public DoesNotReturnIfAttribute(bool parameterValue) => ParameterValue = parameterValue;
+
+        /// <summary>Gets the condition parameter value.</summary>
+        public bool ParameterValue { get; }
+    }
+#endif
+
+#if NETSTANDARD2_0 ||  NETCOREAPP2_0 ||  NETCOREAPP2_1 ||  NETCOREAPP2_2 || NETCOREAPP3_0 || NETCOREAPP3_1 || NET45 || NET451 || NET452 || NET46 || NET461 || NET462 || NET47 || NET471 || NET472 || NET48
+    /// <summary>Specifies that the method or property will ensure that the listed field and property members have not-null values.</summary>
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class MemberNotNullAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with a field or property member.</summary>
+        /// <param name="member">
+        /// The field or property member that is promised to be not-null.
+        /// </param>
+        public MemberNotNullAttribute(string member) => Members = new[] { member };
+
+        /// <summary>Initializes the attribute with the list of field and property members.</summary>
+        /// <param name="members">
+        /// The list of field and property members that are promised to be not-null.
+        /// </param>
+        public MemberNotNullAttribute(params string[] members) => Members = members;
+
+        /// <summary>Gets field or property member names.</summary>
+        public string[] Members { get; }
+    }
+
+    /// <summary>Specifies that the method or property will ensure that the listed field and property members have not-null values when returning with the specified return value condition.</summary>
+    [AttributeUsage(AttributeTargets.Method | AttributeTargets.Property, Inherited = false, AllowMultiple = true)]
+#if SYSTEM_PRIVATE_CORELIB
+    public
+#else
+    internal
+#endif
+        sealed class MemberNotNullWhenAttribute : Attribute
+    {
+        /// <summary>Initializes the attribute with the specified return value condition and a field or property member.</summary>
+        /// <param name="returnValue">
+        /// The return value condition. If the method returns this value, the associated parameter will not be null.
+        /// </param>
+        /// <param name="member">
+        /// The field or property member that is promised to be not-null.
+        /// </param>
+        public MemberNotNullWhenAttribute(bool returnValue, string member)
+        {
+            ReturnValue = returnValue;
+            Members = new[] { member };
+        }
+
+        /// <summary>Initializes the attribute with the specified return value condition and list of field and property members.</summary>
+        /// <param name="returnValue">
+        /// The return value condition. If the method returns this value, the associated parameter will not be null.
+        /// </param>
+        /// <param name="members">
+        /// The list of field and property members that are promised to be not-null.
+        /// </param>
+        public MemberNotNullWhenAttribute(bool returnValue, params string[] members)
+        {
+            ReturnValue = returnValue;
+            Members = members;
+        }
+
+        /// <summary>Gets the return value condition.</summary>
+        public bool ReturnValue { get; }
+
+        /// <summary>Gets field or property member names.</summary>
+        public string[] Members { get; }
+    }
+#endif
+}

PkmnLibRSharpTests/DynamicData/PokemonTests.cs

@@ -0,0 +1,130 @@
+using System;
+using NUnit.Framework;
+using PkmnLibSharp.DynamicData;
+using PkmnLibSharp.DynamicData.Libraries;
+using PkmnLibSharp.StaticData;
+using PkmnLibSharp.StaticData.Libraries;
+
+namespace PkmnLibRSharpTests.DynamicData
+{
+    public class PokemonTests
+    {
+        [Test]
+        public void Pokemon_GetLibrary()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library, pokemon.Library);
+        }
+
+        [Test]
+        public void Pokemon_GetSpecies()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library.StaticData.SpeciesLibrary["testSpecies"], pokemon.Species);
+        }
+
+        [Test]
+        public void Pokemon_GetForm()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library.StaticData.SpeciesLibrary["testSpecies"].DefaultForm, pokemon.Form);
+        }
+
+
+        [Test]
+        public void Pokemon_GetDisplaySpecies()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library.StaticData.SpeciesLibrary["testSpecies"], pokemon.Species);
+        }
+
+        [Test]
+        public void Pokemon_GetDisplayForm()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library.StaticData.SpeciesLibrary["testSpecies"].DefaultForm, pokemon.Form);
+        }
+
+        [Test]
+        public void Pokemon_GetLevel()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(100, pokemon.Level);
+        }
+
+        [Test]
+        public void Pokemon_GetExperience()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).Build();
+            Assert.AreEqual(library.StaticData.GrowthRateLibrary.CalculateExperience("testGrowthrate", 100),
+                pokemon.Experience);
+        }
+
+        [Test]
+        public void Pokemon_GetUniqueIdentifier()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).WithIdentifier(1000).Build();
+            Assert.AreEqual(1000, pokemon.UniqueIdentifier);
+        }
+
+        [Test]
+        public void Pokemon_GetGender()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).WithGender(Gender.Male).Build();
+            Assert.AreEqual(Gender.Male, pokemon.Gender);
+        }
+
+        [Test]
+        public void Pokemon_GetColoring()
+        {
+            using var library = GetLibrary();
+            using var pokemon = new PokemonBuilder(library, "testSpecies", 100).ForceShiny(true).Build();
+            Assert.AreEqual(1, pokemon.Coloring);
+        }
+
+        private static DynamicLibrary GetLibrary()
+        {
+            using var settings = new LibrarySettings(100, 4096);
+            using var speciesLibrary = new SpeciesLibrary(0);
+            FillSpeciesLibrary(speciesLibrary);
+            using var moves = new MoveLibrary(0);
+            using var items = new ItemLibrary(0);
+            using var growthRates = new GrowthRateLibrary(0);
+            using var gr = CommonGrowthRates.Erratic(100);
+            growthRates.AddGrowthRate("testGrowthrate", gr);
+            using var types = new TypeLibrary(0);
+            using var natures = new NatureLibrary(0);
+            natures.LoadNature("testNature", Nature.NeutralNature());
+            using var abilities = new AbilityLibrary(0);
+            using var library = new PkmnLibSharp.StaticData.Libraries.StaticData(settings, speciesLibrary, moves, items,
+                growthRates, types, natures, abilities);
+
+            using var statCalc = new Gen7BattleStatCalculator();
+            using var damageLib = new Gen7DamageLibrary(false);
+            using var miscLib = new Gen7MiscLibrary();
+            using var scriptResolver = new WasmScriptResolver();
+
+            return new DynamicLibrary(library, statCalc, damageLib, miscLib, scriptResolver);
+        }
+
+        private static void FillSpeciesLibrary(SpeciesLibrary speciesLibrary)
+        {
+            using var stats = new StaticStatisticSet<short>(5, 10, 30, 20, 2, 0);
+            using var moves = new LearnableMoves();
+            using var form = new Form("foobar", 0.2f, 5.8f, 300, new TypeIdentifier[] { new(1), new(2) }, stats,
+                new[] { "foo", "bar" }, new[] { "set" }, moves, Array.Empty<string>());
+            using var species =
+                new Species(10, "testSpecies", 0.2f, "testGrowthrate", 120, form, Array.Empty<string>());
+            speciesLibrary.Add(species.Name, species);
+        }
+    }
+}

PkmnLibRSharpTests/StaticData/Libraries/CommonGrowthRateTests.cs

@@ -0,0 +1,94 @@
+using NUnit.Framework;
+using PkmnLibSharp.StaticData;
+
+namespace PkmnLibRSharpTests.StaticData.Libraries
+{
+    public class CommonGrowthRateTests
+    {
+        [TestCase(1, 0)]
+        [TestCase(20, 12_800)]
+        [TestCase(40, 76_800)]
+        [TestCase(60, 194_400)]
+        [TestCase(68, 257_834)]
+        [TestCase(70, 276_458)]
+        [TestCase(80, 378_880)]
+        [TestCase(90, 491_346)]
+        [TestCase(98, 583_539)]
+        [TestCase(100, 600_000)]
+        public void ErraticExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.Erratic(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+
+        [TestCase(1, 0)]
+        [TestCase(20, 6_400)]
+        [TestCase(40, 51_200)]
+        [TestCase(60, 172_800)]
+        [TestCase(70, 274_400)]
+        [TestCase(80, 409_600)]
+        [TestCase(90, 583_200)]
+        [TestCase(100, 800_000)]
+        public void FastExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.Fast(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+
+        [TestCase(1, 0)]
+        [TestCase(20, 8_000)]
+        [TestCase(40, 64_000)]
+        [TestCase(60, 216_000)]
+        [TestCase(70, 343_000)]
+        [TestCase(80, 512_000)]
+        [TestCase(90, 729_000)]
+        [TestCase(100, 1_000_000)]
+        public void MediumFastExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.MediumFast(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+
+        [TestCase(1, 0)]
+        [TestCase(20, 5_460)]
+        [TestCase(40, 56_660)]
+        [TestCase(60, 211_060)]
+        [TestCase(70, 344_960)]
+        [TestCase(80, 526_260)]
+        [TestCase(90, 762_160)]
+        [TestCase(100, 1_059_860)]
+        public void MediumSlowExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.MediumSlow(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+
+        [TestCase(1, 0)]
+        [TestCase(20, 10_000)]
+        [TestCase(40, 80_000)]
+        [TestCase(60, 270_000)]
+        [TestCase(70, 428_750)]
+        [TestCase(80, 640_000)]
+        [TestCase(90, 911_250)]
+        [TestCase(100, 1_250_000)]
+        public void SlowExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.Slow(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+
+        [TestCase(1, 0)]
+        [TestCase(20, 5_440)]
+        [TestCase(40, 66_560)]
+        [TestCase(60, 267_840)]
+        [TestCase(70, 459_620)]
+        [TestCase(80, 737_280)]
+        [TestCase(90, 1_122_660)]
+        [TestCase(100, 1_640_000)]
+        public void FluctuatingExperience(byte level, int experience)
+        {
+            using var growthRate = CommonGrowthRates.Fluctuating(100);
+            Assert.AreEqual(experience, growthRate.CalculateExperience(level));
+        }
+    }
+}

PkmnLibRSharpTests/StaticData/Libraries/LibrarySettingsTests.cs

@@ -8,13 +8,13 @@ namespace PkmnLibRSharpTests.StaticData.Libraries
         [Test]
         public void CreateLibrarySettings()
         {
-            using var settings = new LibrarySettings(100);
+            using var settings = new LibrarySettings(100, 4096);
         }
         
         [Test]
         public void GetMaxLevel()
         {
-            using var settings = new LibrarySettings(100);
+            using var settings = new LibrarySettings(100, 4096);
             Assert.AreEqual(100, settings.MaxLevel);
         }
     }

PkmnLibRSharpTests/StaticData/Libraries/StaticDataTests.cs

@@ -7,7 +7,7 @@ namespace PkmnLibRSharpTests.StaticData.Libraries
     {
         private PkmnLibSharp.StaticData.Libraries.StaticData Build()
         {
-            using var settings = new LibrarySettings(100);
+            using var settings = new LibrarySettings(100, 4096);
             using var species = new SpeciesLibrary(0);
             using var moves = new MoveLibrary(0);
             using var items = new ItemLibrary(0);