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REFACTOR: Invert 'if' statement to reduce nesting.

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This commit is contained in:
Natalia Portillo
2017-12-21 06:06:19 +00:00
parent 9cd1869d1d
commit 4d886dae25
138 changed files with 9447 additions and 9806 deletions
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94
DiscImageChef/Commands/Entropy.cs
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@@ -72,6 +72,9 @@ namespace DiscImageChef.Commands
Core.Statistics.AddMediaFormat(inputFormat.GetImageFormat());
Core.Statistics.AddMedia(inputFormat.ImageInfo.MediaType, false);
Core.Statistics.AddFilter(inputFilter.Name);
double entropy = 0;
ulong[] entTable;
ulong sectors;
if(options.SeparatedTracks)
try
@@ -81,11 +84,11 @@ namespace DiscImageChef.Commands
foreach(Track currentTrack in inputTracks)
{
Sha1Context sha1CtxTrack = new Sha1Context();
ulong[] entTable = new ulong[256];
entTable = new ulong[256];
ulong trackSize = 0;
List<string> uniqueSectorsPerTrack = new List<string>();
ulong sectors = currentTrack.TrackEndSector - currentTrack.TrackStartSector + 1;
sectors = currentTrack.TrackEndSector - currentTrack.TrackStartSector + 1;
DicConsole.WriteLine("Track {0} has {1} sectors", currentTrack.TrackSequence, sectors);
for(ulong i = currentTrack.TrackStartSector; i <= currentTrack.TrackEndSector; i++)
@@ -105,7 +108,6 @@ namespace DiscImageChef.Commands
trackSize += (ulong)sector.LongLength;
}
double entropy = 0;
foreach(ulong l in entTable)
{
#pragma warning disable IDE0004 // Cast is necessary, otherwise incorrect value is created
@@ -132,56 +134,54 @@ namespace DiscImageChef.Commands
else DicConsole.ErrorWriteLine("Unable to get separate tracks, not calculating their entropy");
}
if(options.WholeDisc)
if(!options.WholeDisc) return;
Sha1Context sha1Ctx = new Sha1Context();
entTable = new ulong[256];
ulong diskSize = 0;
List<string> uniqueSectors = new List<string>();
sectors = inputFormat.GetSectors();
DicConsole.WriteLine("Sectors {0}", sectors);
sha1Ctx.Init();
for(ulong i = 0; i < sectors; i++)
{
Sha1Context sha1Ctx = new Sha1Context();
ulong[] entTable = new ulong[256];
ulong diskSize = 0;
List<string> uniqueSectors = new List<string>();
ulong sectors = inputFormat.GetSectors();
DicConsole.WriteLine("Sectors {0}", sectors);
sha1Ctx.Init();
for(ulong i = 0; i < sectors; i++)
{
DicConsole.Write("\rEntropying sector {0}", i + 1);
byte[] sector = inputFormat.ReadSector(i);
if(options.DuplicatedSectors)
{
byte[] garbage;
string sectorHash = sha1Ctx.Data(sector, out garbage);
if(!uniqueSectors.Contains(sectorHash)) uniqueSectors.Add(sectorHash);
}
foreach(byte b in sector) entTable[b]++;
diskSize += (ulong)sector.LongLength;
}
double entropy = 0;
foreach(ulong l in entTable)
{
#pragma warning disable IDE0004 // Cast is necessary, otherwise incorrect value is created
double frequency = (double)l / (double)diskSize;
#pragma warning restore IDE0004 // Cast is necessary, otherwise incorrect value is created
entropy += -(frequency * Math.Log(frequency, 2));
}
DicConsole.WriteLine();
DicConsole.WriteLine("Entropy for disk is {0:F4}.", entropy);
DicConsole.Write("\rEntropying sector {0}", i + 1);
byte[] sector = inputFormat.ReadSector(i);
if(options.DuplicatedSectors)
{
byte[] garbage;
string sectorHash = sha1Ctx.Data(sector, out garbage);
if(!uniqueSectors.Contains(sectorHash)) uniqueSectors.Add(sectorHash);
}
foreach(byte b in sector) entTable[b]++;
diskSize += (ulong)sector.LongLength;
}
foreach(ulong l in entTable)
{
#pragma warning disable IDE0004 // Cast is necessary, otherwise incorrect value is created
DicConsole.WriteLine("Disk has {0} unique sectors ({1:P3})", uniqueSectors.Count,
(double)uniqueSectors.Count / (double)sectors);
double frequency = (double)l / (double)diskSize;
#pragma warning restore IDE0004 // Cast is necessary, otherwise incorrect value is created
entropy += -(frequency * Math.Log(frequency, 2));
}
DicConsole.WriteLine();
DicConsole.WriteLine("Entropy for disk is {0:F4}.", entropy);
if(options.DuplicatedSectors)
#pragma warning disable IDE0004 // Cast is necessary, otherwise incorrect value is created
DicConsole.WriteLine("Disk has {0} unique sectors ({1:P3})", uniqueSectors.Count,
(double)uniqueSectors.Count / (double)sectors);
#pragma warning restore IDE0004 // Cast is necessary, otherwise incorrect value is created
Core.Statistics.AddCommand("entropy");
}
Core.Statistics.AddCommand("entropy");
}
}
}