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using System;
using System.Text;
namespace Ryujinx.Common
{
public static class HexUtils
{
private static readonly char[] _hexChars = "0123456789ABCDEF".ToCharArray();
private const int HexTableColumnWidth = 8;
private const int HexTableColumnSpace = 3;
// Modified for Ryujinx
// Original by Pascal Ganaye - CPOL License
// https://www.codeproject.com/Articles/36747/Quick-and-Dirty-HexDump-of-a-Byte-Array
public static string HexTable(byte[] bytes, int bytesPerLine = 16)
{
if (bytes == null)
{
return "<null>";
}
int bytesLength = bytes.Length;
int firstHexColumn =
HexTableColumnWidth
+ HexTableColumnSpace;
int firstCharColumn = firstHexColumn
+ bytesPerLine * HexTableColumnSpace
+ (bytesPerLine - 1) / HexTableColumnWidth
+ 2;
int lineLength = firstCharColumn
+ bytesPerLine
+ Environment.NewLine.Length;
char[] line = (new String(' ', lineLength - Environment.NewLine.Length) + Environment.NewLine).ToCharArray();
int expectedLines = (bytesLength + bytesPerLine - 1) / bytesPerLine;
StringBuilder result = new(expectedLines * lineLength);
for (int i = 0; i < bytesLength; i += bytesPerLine)
{
line[0] = _hexChars[(i >> 28) & 0xF];
line[1] = _hexChars[(i >> 24) & 0xF];
line[2] = _hexChars[(i >> 20) & 0xF];
line[3] = _hexChars[(i >> 16) & 0xF];
line[4] = _hexChars[(i >> 12) & 0xF];
line[5] = _hexChars[(i >> 8) & 0xF];
line[6] = _hexChars[(i >> 4) & 0xF];
line[7] = _hexChars[(i >> 0) & 0xF];
int hexColumn = firstHexColumn;
int charColumn = firstCharColumn;
for (int j = 0; j < bytesPerLine; j++)
{
if (j > 0 && (j & 7) == 0)
{
hexColumn++;
}
if (i + j >= bytesLength)
{
line[hexColumn] = ' ';
line[hexColumn + 1] = ' ';
line[charColumn] = ' ';
}
else
{
byte b = bytes[i + j];
line[hexColumn] = _hexChars[(b >> 4) & 0xF];
line[hexColumn + 1] = _hexChars[b & 0xF];
line[charColumn] = (b < 32 ? '·' : (char)b);
}
hexColumn += 3;
charColumn++;
}
result.Append(line);
}
return result.ToString();
}
}
}
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