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REFACTOR: Final cleanup of DiscImageChef.DiscImages.

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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
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170
DiscImageChef.DiscImages/QCOW2.cs
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@@ -44,9 +44,8 @@ namespace DiscImageChef.DiscImages
{
public class Qcow2 : ImagePlugin
{
#region Internal constants
/// <summary>
/// Magic number: 'Q', 'F', 'I', 0xFB
/// Magic number: 'Q', 'F', 'I', 0xFB
/// </summary>
const uint QCOW_MAGIC = 0x514649FB;
const uint QCOW_VERSION2 = 2;
@@ -70,98 +69,28 @@ namespace DiscImageChef.DiscImages
const ulong QCOW_HEADER_EXTENSION_BITMAPS = 0x23852875;
const int MAX_CACHE_SIZE = 16777216;
#endregion
#region Internal Structures
/// <summary>
/// QCOW header, big-endian
/// </summary>
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QCow2Header
{
/// <summary>
/// <see cref="Qcow2.QCOW_MAGIC"/>
/// </summary>
public uint magic;
/// <summary>
/// Must be 1
/// </summary>
public uint version;
/// <summary>
/// Offset inside file to string containing backing file
/// </summary>
public ulong backing_file_offset;
/// <summary>
/// Size of <see cref="backing_file_offset"/>
/// </summary>
public uint backing_file_size;
/// <summary>
/// Cluster bits
/// </summary>
public uint cluster_bits;
/// <summary>
/// Size in bytes
/// </summary>
public ulong size;
/// <summary>
/// Encryption method
/// </summary>
public uint crypt_method;
/// <summary>
/// Size of L1 table
/// </summary>
public uint l1_size;
/// <summary>
/// Offset to L1 table
/// </summary>
public ulong l1_table_offset;
/// <summary>
/// Offset to reference count table
/// </summary>
public ulong refcount_table_offset;
/// <summary>
/// How many clusters does the refcount table span
/// </summary>
public uint refcount_table_clusters;
/// <summary>
/// Number of snapshots
/// </summary>
public uint nb_snapshots;
/// <summary>
/// Offset to QCowSnapshotHeader
/// </summary>
public ulong snapshots_offset;
// Added in version 3
public ulong features;
public ulong compat_features;
public ulong autoclear_features;
public uint refcount_order;
public uint header_length;
}
#endregion
QCow2Header qHdr;
int clusterSize;
const int MAX_CACHED_SECTORS = MAX_CACHE_SIZE / 512;
Dictionary<ulong, byte[]> clusterCache;
int clusterSectors;
int l2Bits;
int l2Size;
ulong[] l1Table;
int clusterSize;
Stream imageStream;
ulong l1Mask;
int l1Shift;
ulong[] l1Table;
int l2Bits;
ulong l2Mask;
ulong sectorMask;
int l2Size;
Dictionary<ulong, ulong[]> l2TableCache;
int maxClusterCache;
int maxL2TableCache;
QCow2Header qHdr;
Dictionary<ulong, byte[]> sectorCache;
Dictionary<ulong, byte[]> clusterCache;
Dictionary<ulong, ulong[]> l2TableCache;
const int MAX_CACHED_SECTORS = MAX_CACHE_SIZE / 512;
int maxL2TableCache;
int maxClusterCache;
Stream imageStream;
ulong sectorMask;
public Qcow2()
{
@@ -526,7 +455,6 @@ namespace DiscImageChef.DiscImages
return ImageInfo.MediaType;
}
#region Unsupported features
public override byte[] ReadSectorTag(ulong sectorAddress, SectorTagType tag)
{
throw new FeatureUnsupportedImageException("Feature not supported by image format");
@@ -687,6 +615,72 @@ namespace DiscImageChef.DiscImages
{
return null;
}
#endregion
/// <summary>
/// QCOW header, big-endian
/// </summary>
[StructLayout(LayoutKind.Sequential, Pack = 1)]
struct QCow2Header
{
/// <summary>
/// <see cref="Qcow2.QCOW_MAGIC" />
/// </summary>
public uint magic;
/// <summary>
/// Must be 1
/// </summary>
public uint version;
/// <summary>
/// Offset inside file to string containing backing file
/// </summary>
public ulong backing_file_offset;
/// <summary>
/// Size of <see cref="backing_file_offset" />
/// </summary>
public uint backing_file_size;
/// <summary>
/// Cluster bits
/// </summary>
public uint cluster_bits;
/// <summary>
/// Size in bytes
/// </summary>
public ulong size;
/// <summary>
/// Encryption method
/// </summary>
public uint crypt_method;
/// <summary>
/// Size of L1 table
/// </summary>
public uint l1_size;
/// <summary>
/// Offset to L1 table
/// </summary>
public ulong l1_table_offset;
/// <summary>
/// Offset to reference count table
/// </summary>
public ulong refcount_table_offset;
/// <summary>
/// How many clusters does the refcount table span
/// </summary>
public uint refcount_table_clusters;
/// <summary>
/// Number of snapshots
/// </summary>
public uint nb_snapshots;
/// <summary>
/// Offset to QCowSnapshotHeader
/// </summary>
public ulong snapshots_offset;
// Added in version 3
public ulong features;
public ulong compat_features;
public ulong autoclear_features;
public uint refcount_order;
public uint header_length;
}
}
}