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Add sector chain helpers

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Matt Nadareski
2023-01-09 22:04:29 -08:00
parent 4327ce7848
commit b980b33019
1 changed files with 69 additions and 0 deletions
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69
BurnOutSharp.Wrappers/CFB.cs
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@@ -1,4 +1,5 @@
using System;
using System.Collections.Generic;
using System.IO;
namespace BurnOutSharp.Wrappers
@@ -158,6 +159,74 @@ namespace BurnOutSharp.Wrappers
#endregion
#region Data
/// <summary>
/// Get the ordered FAT sector chain for a given starting sector
/// </summary>
/// <param name="startingSector">Initial FAT sector</param>
/// <returns>Ordered list of sector numbers, null on error</returns>
public List<Models.CFB.SectorNumber> GetFATSectorChain(uint startingSector)
{
// If we have an invalid sector
if (startingSector < 0 || startingSector >= FATSectorNumbers.Length)
return null;
// Setup the returned list
var sectors = new List<Models.CFB.SectorNumber> { (Models.CFB.SectorNumber)startingSector };
var lastSector = (Models.CFB.SectorNumber)startingSector;
while (true)
{
// Get the next sector from the lookup table
var nextSector = FATSectorNumbers[(uint)lastSector];
// If we have an end of chain or free sector
if (nextSector == Models.CFB.SectorNumber.ENDOFCHAIN || nextSector == Models.CFB.SectorNumber.FREESECT)
break;
// Add the next sector to the list and replace the last sector
sectors.Add(nextSector);
lastSector = nextSector;
}
return sectors;
}
/// <summary>
/// Get the ordered Mini FAT sector chain for a given starting sector
/// </summary>
/// <param name="startingSector">Initial Mini FAT sector</param>
/// <returns>Ordered list of sector numbers, null on error</returns>
public List<Models.CFB.SectorNumber> GetMiniFATSectorChain(uint startingSector)
{
// If we have an invalid sector
if (startingSector < 0 || startingSector >= MiniFATSectorNumbers.Length)
return null;
// Setup the returned list
var sectors = new List<Models.CFB.SectorNumber> { (Models.CFB.SectorNumber)startingSector };
var lastSector = (Models.CFB.SectorNumber)startingSector;
while (true)
{
// Get the next sector from the lookup table
var nextSector = MiniFATSectorNumbers[(uint)lastSector];
// If we have an end of chain or free sector
if (nextSector == Models.CFB.SectorNumber.ENDOFCHAIN || nextSector == Models.CFB.SectorNumber.FREESECT)
break;
// Add the next sector to the list and replace the last sector
sectors.Add(nextSector);
lastSector = nextSector;
}
return sectors;
}
#endregion
#region Printing
/// <inheritdoc/>