aaru-dps/Aaru.Server
1
0
Fork 0
mirror of https://github.com/aaru-dps/Aaru.Server.git synced 2025-12-16 19:24:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

REFACTOR: Final cleanup of DiscImageChef.DiscImages.

Browse Source
This commit is contained in:
Natalia Portillo
2017-12-24 00:12:31 +00:00
parent 536888507f
commit 736552f6d8
52 changed files with 5203 additions and 5359 deletions
Download Patch File Download Diff File Expand all files Collapse all files

81
DiscImageChef.DiscImages/DiskCopy42.cs
View File

@@ -48,32 +48,6 @@ namespace DiscImageChef.DiscImages
[SuppressMessage("ReSharper", "InconsistentNaming")]
public class DiskCopy42 : ImagePlugin
{
#region Internal Structures
// DiskCopy 4.2 header, big-endian, data-fork, start of file, 84 bytes
struct Dc42Header
{
/// <summary>0x00, 64 bytes, pascal string, disk name or "-not a Macintosh disk-", filled with garbage</summary>
public string DiskName;
/// <summary>0x40, size of data in bytes (usually sectors*512)</summary>
public uint DataSize;
/// <summary>0x44, size of tags in bytes (usually sectors*12)</summary>
public uint TagSize;
/// <summary>0x48, checksum of data bytes</summary>
public uint DataChecksum;
/// <summary>0x4C, checksum of tag bytes</summary>
public uint TagChecksum;
/// <summary>0x50, format of disk, see constants</summary>
public byte Format;
/// <summary>0x51, format of sectors, see constants</summary>
public byte FmtByte;
/// <summary>0x52, is disk image valid? always 0x01</summary>
public byte Valid;
/// <summary>0x53, reserved, always 0x00</summary>
public byte Reserved;
}
#endregion
#region Internal Constants
// format byte
/// <summary>3.5", single side, double density, GCR</summary>
const byte kSonyFormat400K = 0x00;
@@ -104,7 +78,10 @@ namespace DiscImageChef.DiscImages
const byte kSonyFmtByte1680K = kSonyFmtByte400K;
/// <summary>3.5" double side double density GCR, 512 bytes/sector, interleave 2:1</summary>
const byte kSonyFmtByte800K = 0x22;
/// <summary>3.5" double side double density GCR, 512 bytes/sector, interleave 2:1, incorrect value (but appears on official documentation)</summary>
/// <summary>
/// 3.5" double side double density GCR, 512 bytes/sector, interleave 2:1, incorrect value (but appears on
/// official documentation)
/// </summary>
const byte kSonyFmtByte800KIncorrect = 0x12;
/// <summary>3.5" double side double density GCR, ProDOS format, interleave 4:1</summary>
const byte kSonyFmtByteProDos = 0x24;
@@ -114,24 +91,20 @@ namespace DiscImageChef.DiscImages
const byte kFmtNotStandard = 0x93;
/// <summary>Used incorrectly by Mac OS X with certaing disk images</summary>
const byte kMacOSXFmtByte = 0x00;
#endregion
#region Internal variables
/// <summary>Start of data sectors in disk image, should be 0x58</summary>
uint dataOffset;
/// <summary>Start of tags in disk image, after data sectors</summary>
uint tagOffset;
/// <summary>Bytes per tag, should be 12</summary>
uint bptag;
/// <summary>Header of opened image</summary>
Dc42Header header;
/// <summary>Start of data sectors in disk image, should be 0x58</summary>
uint dataOffset;
/// <summary>Disk image file</summary>
Filter dc42ImageFilter;
/// <summary>Header of opened image</summary>
Dc42Header header;
/// <summary>Start of tags in disk image, after data sectors</summary>
uint tagOffset;
bool twiggy;
byte[] twiggyCache;
byte[] twiggyCacheTags;
bool twiggy;
#endregion
public DiskCopy42()
{
@@ -474,8 +447,7 @@ namespace DiscImageChef.DiscImages
string major = $"{version.MajorVersion}";
string minor = $".{version.MinorVersion / 10}";
if(version.MinorVersion % 10 > 0)
release = $".{version.MinorVersion % 10}";
if(version.MinorVersion % 10 > 0) release = $".{version.MinorVersion % 10}";
switch(version.DevStage)
{
case Version.DevelopmentStage.Alpha:
@@ -803,7 +775,6 @@ namespace DiscImageChef.DiscImages
return ImageInfo.MediaType;
}
#region Unsupported features
public override byte[] ReadDiskTag(MediaTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
@@ -923,9 +894,7 @@ namespace DiscImageChef.DiscImages
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
}
#endregion Unsupported features
#region Private methods
static uint DC42CheckSum(byte[] buffer)
{
uint dc42Chk = 0;
@@ -940,6 +909,28 @@ namespace DiscImageChef.DiscImages
return dc42Chk;
}
#endregion
// DiskCopy 4.2 header, big-endian, data-fork, start of file, 84 bytes
struct Dc42Header
{
/// <summary>0x00, 64 bytes, pascal string, disk name or "-not a Macintosh disk-", filled with garbage</summary>
public string DiskName;
/// <summary>0x40, size of data in bytes (usually sectors*512)</summary>
public uint DataSize;
/// <summary>0x44, size of tags in bytes (usually sectors*12)</summary>
public uint TagSize;
/// <summary>0x48, checksum of data bytes</summary>
public uint DataChecksum;
/// <summary>0x4C, checksum of tag bytes</summary>
public uint TagChecksum;
/// <summary>0x50, format of disk, see constants</summary>
public byte Format;
/// <summary>0x51, format of sectors, see constants</summary>
public byte FmtByte;
/// <summary>0x52, is disk image valid? always 0x01</summary>
public byte Valid;
/// <summary>0x53, reserved, always 0x00</summary>
public byte Reserved;
}
}
}