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Remove the ability to support little endian from BigEndianBitConverter.

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Natalia Portillo
2019-05-11 20:49:32 +01:00
parent d490f554b5
commit 86d9e9e9f9
6 changed files with 46 additions and 109 deletions
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42
CRC16Context.cs
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@@ -30,7 +30,6 @@
// Copyright © 2011-2019 Natalia Portillo
// ****************************************************************************/
using System;
using System.IO;
using System.Text;
using DiscImageChef.CommonTypes.Interfaces;
@@ -64,10 +63,8 @@ namespace DiscImageChef.Checksums
{
ushort entry = (ushort)i;
for(int j = 0; j < 8; j++)
if((entry & 1) == 1)
entry = (ushort)((entry >> 1) ^ CRC16_IBM_POLY);
else
entry = (ushort)(entry >> 1);
if((entry & 1) == 1) entry = (ushort)((entry >> 1) ^ CRC16_IBM_POLY);
else entry = (ushort)(entry >> 1);
table[i] = entry;
}
@@ -86,10 +83,8 @@ namespace DiscImageChef.Checksums
{
ushort entry = (ushort)i;
for(int j = 0; j < 8; j++)
if((entry & 1) == 1)
entry = (ushort)((entry >> 1) ^ polynomial);
else
entry = (ushort)(entry >> 1);
if((entry & 1) == 1) entry = (ushort)((entry >> 1) ^ polynomial);
else entry = (ushort)(entry >> 1);
table[i] = entry;
}
@@ -117,11 +112,7 @@ namespace DiscImageChef.Checksums
/// <summary>
/// Returns a byte array of the hash value.
/// </summary>
public byte[] Final()
{
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
return BigEndianBitConverter.GetBytes((ushort)(hashInt ^ finalSeed));
}
public byte[] Final() => BigEndianBitConverter.GetBytes((ushort)(hashInt ^ finalSeed));
/// <summary>
/// Returns a hexadecimal representation of the hash value.
@@ -130,7 +121,6 @@ namespace DiscImageChef.Checksums
{
StringBuilder crc16Output = new StringBuilder();
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
for(int i = 0; i < BigEndianBitConverter.GetBytes((ushort)(hashInt ^ finalSeed)).Length; i++)
crc16Output.Append(BigEndianBitConverter.GetBytes((ushort)(hashInt ^ finalSeed))[i].ToString("x2"));
@@ -171,10 +161,8 @@ namespace DiscImageChef.Checksums
{
ushort entry = (ushort)i;
for(int j = 0; j < 8; j++)
if((entry & 1) == 1)
entry = (ushort)((entry >> 1) ^ polynomial);
else
entry = (ushort)(entry >> 1);
if((entry & 1) == 1) entry = (ushort)((entry >> 1) ^ polynomial);
else entry = (ushort)(entry >> 1);
localTable[i] = entry;
}
@@ -183,9 +171,8 @@ namespace DiscImageChef.Checksums
localhashInt =
(ushort)((localhashInt >> 8) ^ localTable[fileStream.ReadByte() ^ (localhashInt & 0xff)]);
localhashInt ^= seed;
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(localhashInt);
localhashInt ^= seed;
hash = BigEndianBitConverter.GetBytes(localhashInt);
StringBuilder crc16Output = new StringBuilder();
@@ -222,10 +209,8 @@ namespace DiscImageChef.Checksums
{
ushort entry = (ushort)i;
for(int j = 0; j < 8; j++)
if((entry & 1) == 1)
entry = (ushort)((entry >> 1) ^ polynomial);
else
entry = (ushort)(entry >> 1);
if((entry & 1) == 1) entry = (ushort)((entry >> 1) ^ polynomial);
else entry = (ushort)(entry >> 1);
localTable[i] = entry;
}
@@ -233,9 +218,8 @@ namespace DiscImageChef.Checksums
for(int i = 0; i < len; i++)
localhashInt = (ushort)((localhashInt >> 8) ^ localTable[data[i] ^ (localhashInt & 0xff)]);
localhashInt ^= seed;
BigEndianBitConverter.IsLittleEndian = BitConverter.IsLittleEndian;
hash = BigEndianBitConverter.GetBytes(localhashInt);
localhashInt ^= seed;
hash = BigEndianBitConverter.GetBytes(localhashInt);
StringBuilder crc16Output = new StringBuilder();