using System;

using System.Collections.Generic;

using System.Linq;

​

public class Program

{

    public static void Main() {

        void test(string Nm) {

            Console.WriteLine($"\t{Nm} = {Nm.GetFNV32Val()},");

        }

        Console.WriteLine("public enum KnownBiome : uint {");

        test("Arctic");

        test("Beach");

        test("Desert");

        test("Jungle");

        test("Mountain");

        test("Ocean");

        Console.WriteLine("}");

    }

}

​

/// <summary>

/// Simple hash generation utilities for <see langword="byte"/> collections.

/// </summary>

internal static class HashUtils {

    internal static uint GetFNV32Val( this IEnumerable<char> Chars ) => FNV32(Chars.Select(C => Convert.ToByte(char.ToLower(C))));

    internal static ulong GetFNV64Val( this IEnumerable<char> Chars ) => FNV64(Chars.Select(C => Convert.ToByte(char.ToLower(C))));

​

    /// <summary>

    /// Converts the given collection of characters into a unique <c>FNV32</c> hash string.

    /// </summary>

    /// <param name="Chars">The collection of characters to convert. Characters will first be converted into lowercase via <see cref="char.ToLower(char)"/>, followed by converted into a <see cref="byte"/> via <see cref="Convert.ToByte(char)"/>.</param>

    /// <returns>A unique FNV32 hash string.</returns>

    /// <seealso cref="FNV32(IEnumerable{byte})"/>

    internal static string GetFNV32( this IEnumerable<char> Chars ) => GetFNV32Val(Chars).ToString("X");

​

    /// <summary>

    /// Implements the <see href="https://en.wikipedia.org/wiki/Fowler–Noll–Vo_hash_function">Fowler-Noll-Vo</see> 32-bit hash function, as described in <see href="https://modthesims.info/wiki.php?title=FNV">Sims 3</see> resource files.

    /// </summary>

    /// <param name="Data">The collection of <see cref="byte"/>s in memory.</param>

    /// <returns>A unique FNV32 hash.</returns>

    internal static uint FNV32( this IEnumerable<byte> Data ) {

        uint Hash = 0x811C9DC5;

        foreach ( byte B in Data ) {

            Hash *= 0x01000193;

            Hash ^= B;

        }

        return Hash;

    }

​

    /// <summary>

    /// Converts the given collection of characters into a unique <c>FNV64</c> hash string.

    /// </summary>

    /// <param name="Chars">The collection of characters to convert. Characters will first be converted into lowercase via <see cref="char.ToLower(char)"/>, followed by converted into a <see cref="byte"/> via <see cref="Convert.ToByte(char)"/>.</param>

    /// <returns>A unique FNV64 hash string.</returns>

    /// <seealso cref="FNV64(IEnumerable{byte})"/>

    internal static string GetFNV64( this IEnumerable<char> Chars ) => GetFNV64Val(Chars).ToString("X");

​

    /// <summary>

    /// Implements the <see href="https://en.wikipedia.org/wiki/Fowler–Noll–Vo_hash_function">Fowler-Noll-Vo</see> 64-bit hash function, as described in <see href="https://modthesims.info/wiki.php?title=FNV">Sims 3</see> resource files.

    /// </summary>

    /// <param name="Data">The collection of <see cref="byte"/>s in memory.</param>

    /// <returns>A unique FNV64 hash.</returns>

    internal static ulong FNV64( this IEnumerable<byte> Data ) {

        ulong Hash = 0xCBF29CE484222325;

        foreach ( byte B in Data ) {

            Hash *= 0x00000100000001B3;

            Hash ^= B;

        }

        return Hash;

    }

}