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Add support to swap endian of struct enums.

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This commit is contained in:
Natalia Portillo
2020-02-19 01:08:34 +00:00
parent 0f4820e123
commit 035605d869
1 changed files with 27 additions and 22 deletions
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49
Marshal.cs
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@@ -53,10 +53,9 @@ namespace DiscImageChef.Helpers
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T ByteArrayToStructureLittleEndian<T>(byte[] bytes) where T : struct
{
GCHandle ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
var ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
var str =
(T)System.Runtime.InteropServices.Marshal.PtrToStructure(ptr.AddrOfPinnedObject(), typeof(T));
var str = (T)System.Runtime.InteropServices.Marshal.PtrToStructure(ptr.AddrOfPinnedObject(), typeof(T));
ptr.Free();
@@ -84,10 +83,9 @@ namespace DiscImageChef.Helpers
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T ByteArrayToStructureBigEndian<T>(byte[] bytes) where T : struct
{
GCHandle ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
var ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
object str =
(T)System.Runtime.InteropServices.Marshal.PtrToStructure(ptr.AddrOfPinnedObject(), typeof(T));
object str = (T)System.Runtime.InteropServices.Marshal.PtrToStructure(ptr.AddrOfPinnedObject(), typeof(T));
ptr.Free();
@@ -116,7 +114,7 @@ namespace DiscImageChef.Helpers
public static T ByteArrayToStructurePdpEndian<T>(byte[] bytes) where T : struct
{
{
GCHandle ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
var ptr = GCHandle.Alloc(bytes, GCHandleType.Pinned);
object str =
(T)System.Runtime.InteropServices.Marshal.PtrToStructure(ptr.AddrOfPinnedObject(), typeof(T));
@@ -175,7 +173,7 @@ namespace DiscImageChef.Helpers
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T SpanToStructureBigEndian<T>(ReadOnlySpan<byte> bytes) where T : struct
{
var str = SpanToStructureLittleEndian<T>(bytes);
T str = SpanToStructureLittleEndian<T>(bytes);
return(T)SwapStructureMembersEndian(str);
}
@@ -192,7 +190,7 @@ namespace DiscImageChef.Helpers
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static T SpanToStructureBigEndian<T>(ReadOnlySpan<byte> bytes, int start, int length) where T : struct
{
var str = SpanToStructureLittleEndian<T>(bytes.Slice(start, length));
T str = SpanToStructureLittleEndian<T>(bytes.Slice(start, length));
return(T)SwapStructureMembersEndian(str);
}
@@ -255,7 +253,6 @@ namespace DiscImageChef.Helpers
return properties.HasReferences ? ByteArrayToStructureBigEndian<T>(bytes)
: SpanToStructureBigEndian<T>(bytes);
case BitEndian.Pdp:
return properties.HasReferences ? ByteArrayToStructurePdpEndian<T>(bytes)
: SpanToStructurePdpEndian<T>(bytes);
@@ -273,18 +270,21 @@ namespace DiscImageChef.Helpers
FieldInfo[] fieldInfo = t.GetFields();
foreach(FieldInfo fi in fieldInfo)
if(fi.FieldType == typeof(short))
if(fi.FieldType == typeof(short) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(short)))
{
short x = (short)fi.GetValue(str);
fi.SetValue(str, (short)((x << 8) | ((x >> 8) & 0xFF)));
}
else if(fi.FieldType == typeof(int))
else if(fi.FieldType == typeof(int) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(int)))
{
int x = (int)fi.GetValue(str);
x = (int)(((x << 8) & 0xFF00FF00) | (((uint)x >> 8) & 0xFF00FF));
fi.SetValue(str, (int)(((uint)x << 16) | (((uint)x >> 16) & 0xFFFF)));
}
else if(fi.FieldType == typeof(long))
else if(fi.FieldType == typeof(long) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(long)))
{
long x = (long)fi.GetValue(str);
x = ((x & 0x00000000FFFFFFFF) << 32) | (long)(((ulong)x & 0xFFFFFFFF00000000) >> 32);
@@ -293,18 +293,21 @@ namespace DiscImageChef.Helpers
fi.SetValue(str, x);
}
else if(fi.FieldType == typeof(ushort))
else if(fi.FieldType == typeof(ushort) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(ushort)))
{
ushort x = (ushort)fi.GetValue(str);
fi.SetValue(str, (ushort)((x << 8) | (x >> 8)));
}
else if(fi.FieldType == typeof(uint))
else if(fi.FieldType == typeof(uint) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(uint)))
{
uint x = (uint)fi.GetValue(str);
x = ((x << 8) & 0xFF00FF00) | ((x >> 8) & 0xFF00FF);
fi.SetValue(str, (x << 16) | (x >> 16));
}
else if(fi.FieldType == typeof(ulong))
else if(fi.FieldType == typeof(ulong) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(ulong)))
{
ulong x = (ulong)fi.GetValue(str);
x = ((x & 0x00000000FFFFFFFF) << 32) | ((x & 0xFFFFFFFF00000000) >> 32);
@@ -342,7 +345,7 @@ namespace DiscImageChef.Helpers
// TODO: Swap GUID
}
// TODO: Swap arrays and enums
// TODO: Swap arrays
else if(fi.FieldType.IsValueType &&
!fi.FieldType.IsEnum &&
!fi.FieldType.IsArray)
@@ -374,18 +377,20 @@ namespace DiscImageChef.Helpers
{
// Do nothing
}
else if(fi.FieldType == typeof(int))
else if(fi.FieldType == typeof(int) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(int)))
{
int x = (int)fi.GetValue(str);
fi.SetValue(str, ((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
}
else if(fi.FieldType == typeof(uint))
else if(fi.FieldType == typeof(uint) ||
(fi.FieldType.IsEnum && fi.FieldType.GetEnumUnderlyingType() == typeof(uint)))
{
uint x = (uint)fi.GetValue(str);
fi.SetValue(str, ((x & 0xffff) << 16) | ((x & 0xffff0000) >> 16));
}
// TODO: Swap arrays and enums
// TODO: Swap arrays
else if(fi.FieldType.IsValueType &&
!fi.FieldType.IsEnum &&
!fi.FieldType.IsArray)
@@ -405,8 +410,8 @@ namespace DiscImageChef.Helpers
[MethodImpl(MethodImplOptions.AggressiveInlining)]
public static byte[] StructureToByteArrayLittleEndian<T>(T str) where T : struct
{
byte[] buf = new byte[SizeOf<T>()];
GCHandle ptr = GCHandle.Alloc(buf, GCHandleType.Pinned);
byte[] buf = new byte[SizeOf<T>()];
var ptr = GCHandle.Alloc(buf, GCHandleType.Pinned);
System.Runtime.InteropServices.Marshal.StructureToPtr(str, ptr.AddrOfPinnedObject(), false);
ptr.Free();