mirror of
https://github.com/aaru-dps/Aaru.git
synced 2025-12-16 19:24:25 +00:00
Optimize big endian marshalling.
This commit is contained in:
@@ -31,7 +31,6 @@
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// ****************************************************************************/
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using System;
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using System.Linq;
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using System.Reflection;
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using System.Runtime.InteropServices;
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@@ -67,59 +66,57 @@ namespace DiscImageChef
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foreach(FieldInfo fi in fieldInfo)
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if(fi.FieldType == typeof(short))
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{
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short int16 = (short)fi.GetValue(str);
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byte[] int16_b = BitConverter.GetBytes(int16);
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byte[] int16_r = int16_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToInt16(int16_r, 0));
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short x = (short)fi.GetValue(str);
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fi.SetValue(str, (short)((x << 8) | ((x >> 8) & 0xFF)));
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}
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else if(fi.FieldType == typeof(int))
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{
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int int32 = (int)fi.GetValue(str);
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byte[] int32_b = BitConverter.GetBytes(int32);
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byte[] int32_r = int32_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToInt32(int32_r, 0));
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int x = (int)fi.GetValue(str);
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x = (int)(((x << 8) & 0xFF00FF00) | (((uint)x >> 8) & 0xFF00FF));
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fi.SetValue(str, (int)(((uint)x << 16) | (((uint)x >> 16) & 0xFFFF)));
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}
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else if(fi.FieldType == typeof(long))
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{
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long int64 = (long)fi.GetValue(str);
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byte[] int64_b = BitConverter.GetBytes(int64);
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byte[] int64_r = int64_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToInt64(int64_r, 0));
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long x = (long)fi.GetValue(str);
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x = ((x & 0x00000000FFFFFFFF) << 32) | (long)(((ulong)x & 0xFFFFFFFF00000000) >> 32);
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x = ((x & 0x0000FFFF0000FFFF) << 16) | (long)(((ulong)x & 0xFFFF0000FFFF0000) >> 16);
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x = ((x & 0x00FF00FF00FF00FF) << 8) | (long)(((ulong)x & 0xFF00FF00FF00FF00) >> 8);
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fi.SetValue(str, x);
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}
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else if(fi.FieldType == typeof(ushort))
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{
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ushort uint16 = (ushort)fi.GetValue(str);
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byte[] uint16_b = BitConverter.GetBytes(uint16);
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byte[] uint16_r = uint16_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToUInt16(uint16_r, 0));
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ushort x = (ushort)fi.GetValue(str);
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fi.SetValue(str, (ushort)((x << 8) | (x >> 8)));
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}
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else if(fi.FieldType == typeof(uint))
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{
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uint uint32 = (uint)fi.GetValue(str);
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byte[] uint32_b = BitConverter.GetBytes(uint32);
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byte[] uint32_r = uint32_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToUInt32(uint32_r, 0));
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uint x = (uint)fi.GetValue(str);
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x = ((x << 8) & 0xFF00FF00) | ((x >> 8) & 0xFF00FF);
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fi.SetValue(str, (x << 16) | (x >> 16));
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}
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else if(fi.FieldType == typeof(ulong))
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{
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ulong uint64 = (ulong)fi.GetValue(str);
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byte[] uint64_b = BitConverter.GetBytes(uint64);
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byte[] uint64_r = uint64_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToUInt64(uint64_r, 0));
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ulong x = (ulong)fi.GetValue(str);
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x = ((x & 0x00000000FFFFFFFF) << 32) | ((x & 0xFFFFFFFF00000000) >> 32);
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x = ((x & 0x0000FFFF0000FFFF) << 16) | ((x & 0xFFFF0000FFFF0000) >> 16);
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x = ((x & 0x00FF00FF00FF00FF) << 8) | ((x & 0xFF00FF00FF00FF00) >> 8);
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fi.SetValue(str, x);
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}
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else if(fi.FieldType == typeof(float))
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{
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float flt = (float)fi.GetValue(str);
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byte[] flt_b = BitConverter.GetBytes(flt);
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byte[] flt_r = flt_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToSingle(flt_r, 0));
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fi.SetValue(str, BitConverter.ToSingle(new[] {flt_b[3], flt_b[2], flt_b[1], flt_b[0]}, 0));
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}
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else if(fi.FieldType == typeof(double))
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{
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double dbl = (double)fi.GetValue(str);
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byte[] dbl_b = BitConverter.GetBytes(dbl);
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byte[] dbl_r = dbl_b.Reverse().ToArray();
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fi.SetValue(str, BitConverter.ToDouble(dbl_r, 0));
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fi.SetValue(str,
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BitConverter
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.ToDouble(new[] {dbl_b[7], dbl_b[6], dbl_b[5], dbl_b[4], dbl_b[3], dbl_b[2], dbl_b[1], dbl_b[0]},
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0));
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}
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else if(fi.FieldType == typeof(byte) || fi.FieldType == typeof(sbyte))
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{
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85
Swapping.cs
85
Swapping.cs
@@ -30,83 +30,14 @@
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// Copyright © 2011-2019 Natalia Portillo
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// ****************************************************************************/
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using System;
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using System.Linq;
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namespace DiscImageChef
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{
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public static class Swapping
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{
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public static byte[] SwapTenBytes(byte[] source)
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{
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byte[] destination = new byte[8];
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destination[0] = source[9];
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destination[1] = source[8];
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destination[2] = source[7];
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destination[3] = source[6];
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destination[4] = source[5];
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destination[5] = source[4];
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destination[6] = source[3];
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destination[7] = source[2];
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destination[8] = source[1];
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destination[9] = source[0];
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return destination;
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}
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public static byte[] SwapEightBytes(byte[] source)
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{
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byte[] destination = new byte[8];
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destination[0] = source[7];
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destination[1] = source[6];
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destination[2] = source[5];
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destination[3] = source[4];
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destination[4] = source[3];
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destination[5] = source[2];
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destination[6] = source[1];
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destination[7] = source[0];
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return destination;
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}
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public static byte[] SwapFourBytes(byte[] source)
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{
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byte[] destination = new byte[4];
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destination[0] = source[3];
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destination[1] = source[2];
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destination[2] = source[1];
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destination[3] = source[0];
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return destination;
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}
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public static byte[] SwapTwoBytes(byte[] source)
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{
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byte[] destination = new byte[2];
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destination[0] = source[1];
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destination[1] = source[0];
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return destination;
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}
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public static uint PDPFromLittleEndian(uint x) => ((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16);
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public static uint PDPFromBigEndian(uint x) => ((x & 0xff00ff) << 8) | ((x & 0xff00ff00) >> 8);
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public static ulong Swap(ulong x)
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{
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x = ((x & 0x00000000FFFFFFFF) << 32) | ((x & 0xFFFFFFFF00000000) >> 32);
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x = ((x & 0x0000FFFF0000FFFF) << 16) | ((x & 0xFFFF0000FFFF0000) >> 16);
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x = ((x & 0x00FF00FF00FF00FF) << 8) | ((x & 0xFF00FF00FF00FF00) >> 8);
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return x;
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}
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public static long Swap(long x) => BitConverter.ToInt64(BitConverter.GetBytes(x).Reverse().ToArray(), 0);
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public static ushort Swap(ushort x) => (ushort)((x << 8) | (x >> 8));
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public static short Swap(short x) => (short)((x << 8) | ((x >> 8) & 0xFF));
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@@ -122,5 +53,21 @@ namespace DiscImageChef
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x = (int)(((x << 8) & 0xFF00FF00) | (((uint)x >> 8) & 0xFF00FF));
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return (int)(((uint)x << 16) | (((uint)x >> 16) & 0xFFFF));
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}
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public static ulong Swap(ulong x)
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{
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x = ((x & 0x00000000FFFFFFFF) << 32) | ((x & 0xFFFFFFFF00000000) >> 32);
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x = ((x & 0x0000FFFF0000FFFF) << 16) | ((x & 0xFFFF0000FFFF0000) >> 16);
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x = ((x & 0x00FF00FF00FF00FF) << 8) | ((x & 0xFF00FF00FF00FF00) >> 8);
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return x;
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}
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public static long Swap(long x)
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{
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x = ((x & 0x00000000FFFFFFFF) << 32) | (long)(((ulong)x & 0xFFFFFFFF00000000) >> 32);
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x = ((x & 0x0000FFFF0000FFFF) << 16) | (long)(((ulong)x & 0xFFFF0000FFFF0000) >> 16);
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x = ((x & 0x00FF00FF00FF00FF) << 8) | (long)(((ulong)x & 0xFF00FF00FF00FF00) >> 8);
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return x;
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}
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}
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}
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