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perf: Improve ByteArrayExt

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Crsky
2026-03-23 22:00:26 +08:00
parent a195c676d4
commit 4f7f84ec81
1 changed files with 69 additions and 0 deletions
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69
GameRes/ByteArray.cs
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@@ -26,6 +26,7 @@
using System; using System;
using System.Collections; using System.Collections;
using System.Collections.Generic; using System.Collections.Generic;
using System.Runtime.CompilerServices;
using GameRes.Utility; using GameRes.Utility;
namespace GameRes namespace GameRes
@@ -142,6 +143,74 @@ namespace GameRes
} }
public static class ByteArrayExt public static class ByteArrayExt
{
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ushort ToUInt16 (this byte[] arr, int index)
{
return (ushort)(arr[index] | arr[index+1] << 8);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static short ToInt16 (this byte[] arr, int index)
{
return (short)(arr[index] | arr[index+1] << 8);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ToInt24 (this byte[] arr, int index)
{
return arr[index] | arr[index+1] << 8 | arr[index+2] << 16;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static uint ToUInt32 (this byte[] arr, int index)
{
return (uint)(arr[index] | arr[index+1] << 8 | arr[index+2] << 16 | arr[index+3] << 24);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static int ToInt32 (this byte[] arr, int index)
{
return (int)ToUInt32 (arr, index);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static ulong ToUInt64 (this byte[] arr, int index)
{
return (ulong)ToUInt32 (arr, index) | ((ulong)ToUInt32 (arr, index+4) << 32);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static long ToInt64 (this byte[] arr, int index)
{
return (long)ToUInt64 (arr, index);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool AsciiEqual (this byte[] arr, int index, string str)
{
if (arr.Length-index < str.Length)
return false;
for (int i = 0; i < str.Length; ++i)
if ((char)arr[index+i] != str[i])
return false;
return true;
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static bool AsciiEqual (this byte[] arr, string str)
{
return arr.AsciiEqual (0, str);
}
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static string GetCString (this byte[] arr, int index, int length_limit)
{
return Binary.GetCString (arr, index, length_limit);
}
}
public static class CowArrayExt
{ {
public static ushort ToUInt16<TArray> (this TArray arr, int index) where TArray : IList<byte> public static ushort ToUInt16<TArray> (this TArray arr, int index) where TArray : IList<byte>
{ {