Add project files.

AssetStudio/Extensions/BitConverterExtensions.cs

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+using System;
+using System.Runtime.CompilerServices;
+using System.Runtime.InteropServices;
+
+namespace AssetStudio
+{
+	public static class BitConverterExtensions
+	{
+		[StructLayout(LayoutKind.Explicit)]
+		private struct FloatUIntUnion
+		{
+			[FieldOffset(0)]
+			public uint Int;
+			[FieldOffset(0)]
+			public float Float;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static uint ToUInt32(float value)
+		{
+			return new FloatUIntUnion { Float = value }.Int;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static ulong ToUInt64(double value)
+		{
+			return unchecked((ulong)BitConverter.DoubleToInt64Bits(value));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static float ToSingle(uint value)
+		{
+			return new FloatUIntUnion { Int = value }.Float;
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static double ToDouble(ulong value)
+		{
+			return BitConverter.Int64BitsToDouble(unchecked((long)value));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static void GetBytes(ushort value, byte[] buffer, int offset)
+		{
+			buffer[offset + 0] = unchecked((byte)(value >> 0));
+			buffer[offset + 1] = unchecked((byte)(value >> 8));
+		}
+
+		public static void GetBytes(uint value, byte[] buffer, int offset)
+		{
+			buffer[offset + 0] = unchecked((byte)(value >> 0));
+			buffer[offset + 1] = unchecked((byte)(value >> 8));
+			buffer[offset + 2] = unchecked((byte)(value >> 16));
+			buffer[offset + 3] = unchecked((byte)(value >> 24));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static short Swap(short value)
+		{
+			return unchecked((short)(Swap(unchecked((ushort)value))));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static ushort Swap(ushort value)
+		{
+			return unchecked((ushort)(value >> 8 | value << 8));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static int Swap(int value)
+		{
+			return unchecked((int)(Swap(unchecked((uint)value))));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static uint Swap(uint value)
+		{
+			value = value >> 16 | value << 16;
+			return ((value & 0xFF00FF00) >> 8) | ((value & 0x00FF00FF) << 8);
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static long Swap(long value)
+		{
+			return unchecked((long)(Swap(unchecked((ulong)value))));
+		}
+
+		[MethodImpl(MethodImplOptions.AggressiveInlining)]
+		public static ulong Swap(ulong value)
+		{
+			value = value >> 32 | value << 32;
+			value = ((value & 0xFFFF0000FFFF0000) >> 16) | ((value & 0x0000FFFF0000FFFF) << 16);
+			return ((value & 0xFF00FF00FF00FF00) >> 8) | ((value & 0x00FF00FF00FF00FF) << 8);
+		}
+
+		public static int GetDigitsCount(uint value)
+		{
+			int count = 0;
+			while (value != 0)
+			{
+				value /= 10;
+				count++;
+			}
+			return count;
+		}
+	}
+}