mirror of
https://github.com/kwsch/PKHeX
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7cfdb8a466
Fixes #3455 by adding bool for insular sea, and adjusting overall progress values as listed. Closes #3456 (supersedes) Updates SCBlockAccessor to eliminate bounds check (integer overflow, which isn't possible with our array size), adds some overloads, and xmldoc. Co-Authored-By: Jonathan Herbert <3344332+foohyfooh@users.noreply.github.com>
45 lines
1.3 KiB
C#
45 lines
1.3 KiB
C#
using System;
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namespace PKHeX.Core;
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/// <summary>
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/// Fowler–Noll–Vo non-cryptographic hash
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/// </summary>
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/// <remarks>https://en.wikipedia.org/wiki/Fowler%E2%80%93Noll%E2%80%93Vo_hash_function</remarks>
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public static class FnvHash
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{
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private const ulong kFnvPrime_64 = 0x00000100000001b3;
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private const ulong kOffsetBasis_64 = 0xCBF29CE484222645;
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/// <summary>
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/// Gets the hash code of the input sequence via the alternative Fnv1 method.
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/// </summary>
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/// <param name="input">Input sequence</param>
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/// <param name="hash">Initial hash value</param>
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/// <returns>Computed hash code</returns>
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public static ulong HashFnv1a_64(ReadOnlySpan<char> input, ulong hash = kOffsetBasis_64)
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{
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foreach (var c in input)
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{
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hash ^= c;
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hash *= kFnvPrime_64;
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}
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return hash;
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}
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/// <summary>
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/// Gets the hash code of the input sequence via the alternative Fnv1 method.
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/// </summary>
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/// <param name="input">Input sequence</param>
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/// <param name="hash">Initial hash value</param>
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/// <returns>Computed hash code</returns>
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public static ulong HashFnv1a_64(ReadOnlySpan<byte> input, ulong hash = kOffsetBasis_64)
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{
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foreach (var c in input)
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{
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hash ^= c;
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hash *= kFnvPrime_64;
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}
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return hash;
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}
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}
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