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pythonnet/src/runtime/PythonTypes/PyType.cs at master · Nolfurh/pythonnet · GitHub
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PythonTypes
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PyType.cs
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PythonTypes
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PyType.cs
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using
System
;
using
System
.
Diagnostics
;
using
System
.
Runtime
.
Serialization
;
using
Python
.
Runtime
.
Native
;
namespace
Python
.
Runtime
{
[
Serializable
]
public
class
PyType
:
PyObject
{
/// <summary>Creates heap type object from the <paramref name="spec"/>.</summary>
public
PyType
(
TypeSpec
spec
,
PyTuple
?
bases
=
null
)
:
base
(
FromSpec
(
spec
,
bases
)
)
{
}
/// <summary>Wraps an existing type object.</summary>
public
PyType
(
PyObject
o
)
:
base
(
FromObject
(
o
)
)
{
}
internal
PyType
(
PyType
o
)
:
base
(
o
is
not
null
?
o
.
Reference
:
throw
new
ArgumentNullException
(
nameof
(
o
)
)
)
{
}
internal
PyType
(
BorrowedReference
reference
,
bool
prevalidated
=
false
)
:
base
(
reference
)
{
if
(
prevalidated
)
return
;
if
(
!
Runtime
.
PyType_Check
(
this
)
)
throw
new
ArgumentException
(
"object is not a type"
)
;
}
internal
PyType
(
in
StolenReference
reference
,
bool
prevalidated
=
false
)
:
base
(
reference
)
{
if
(
prevalidated
)
return
;
if
(
!
Runtime
.
PyType_Check
(
this
)
)
throw
new
ArgumentException
(
"object is not a type"
)
;
}
protected
PyType
(
SerializationInfo
info
,
StreamingContext
context
)
:
base
(
info
,
context
)
{
}
internal
new
static
PyType
?
FromNullableReference
(
BorrowedReference
reference
)
=>
reference
==
null
?
null
:
new
PyType
(
new
NewReference
(
reference
)
.
Steal
(
)
)
;
internal
static
PyType
FromReference
(
BorrowedReference
reference
)
=>
FromNullableReference
(
reference
)
??
throw
new
ArgumentNullException
(
nameof
(
reference
)
)
;
public
string
Name
{
get
{
var
namePtr
=
new
StrPtr
{
RawPointer
=
Util
.
ReadIntPtr
(
this
,
TypeOffset
.
tp_name
)
,
}
;
return
namePtr
.
ToString
(
System
.
Text
.
Encoding
.
UTF8
)
!
;
}
}
/// <summary>Returns <c>true</c> when type is fully initialized</summary>
public
bool
IsReady
=>
Flags
.
HasFlag
(
TypeFlags
.
Ready
)
;
internal
TypeFlags
Flags
{
get
=>
(
TypeFlags
)
Util
.
ReadCLong
(
this
,
TypeOffset
.
tp_flags
)
;
set
=>
Util
.
WriteCLong
(
this
,
TypeOffset
.
tp_flags
,
(
long
)
value
)
;
}
internal
PyDict
Dict
=>
new
(
Util
.
ReadRef
(
this
,
TypeOffset
.
tp_dict
)
)
;
internal
PyTuple
MRO
=>
new
(
GetMRO
(
this
)
)
;
/// <summary>Checks if specified object is a Python type.</summary>
public
static
bool
IsType
(
PyObject
value
)
{
if
(
value
is
null
)
throw
new
ArgumentNullException
(
nameof
(
value
)
)
;
return
Runtime
.
PyType_Check
(
value
.
obj
)
;
}
/// <summary>Checks if specified object is a Python type.</summary>
internal
static
bool
IsType
(
BorrowedReference
value
)
{
return
Runtime
.
PyType_Check
(
value
)
;
}
/// <summary>
/// Gets <see cref="PyType"/>, which represents the specified CLR type.
/// </summary>
public
static
PyType
Get
(
Type
clrType
)
{
if
(
clrType
is
null
)
{
throw
new
ArgumentNullException
(
nameof
(
clrType
)
)
;
}
return
new
PyType
(
ClassManager
.
GetClass
(
clrType
)
)
;
}
internal
BorrowedReference
BaseReference
{
get
=>
GetBase
(
Reference
)
;
set
=>
Runtime
.
ReplaceReference
(
this
,
TypeOffset
.
tp_base
,
new
NewReference
(
value
)
.
Steal
(
)
)
;
}
internal
IntPtr
GetSlot
(
TypeSlotID
slot
)
{
IntPtr
result
=
Runtime
.
PyType_GetSlot
(
this
.
Reference
,
slot
)
;
return
Exceptions
.
ErrorCheckIfNull
(
result
)
;
}
internal
static
TypeFlags
GetFlags
(
BorrowedReference
type
)
{
Debug
.
Assert
(
TypeOffset
.
tp_flags
>
0
)
;
return
(
TypeFlags
)
Util
.
ReadCLong
(
type
,
TypeOffset
.
tp_flags
)
;
}
internal
static
void
SetFlags
(
BorrowedReference
type
,
TypeFlags
flags
)
{
Debug
.
Assert
(
TypeOffset
.
tp_flags
>
0
)
;
Util
.
WriteCLong
(
type
,
TypeOffset
.
tp_flags
,
(
long
)
flags
)
;
}
internal
static
BorrowedReference
GetBase
(
BorrowedReference
type
)
{
Debug
.
Assert
(
IsType
(
type
)
)
;
return
Util
.
ReadRef
(
type
,
TypeOffset
.
tp_base
)
;
}
internal
static
BorrowedReference
GetBases
(
BorrowedReference
type
)
{
Debug
.
Assert
(
IsType
(
type
)
)
;
return
Util
.
ReadRef
(
type
,
TypeOffset
.
tp_bases
)
;
}
internal
static
BorrowedReference
GetMRO
(
BorrowedReference
type
)
{
Debug
.
Assert
(
IsType
(
type
)
)
;
return
Util
.
ReadRef
(
type
,
TypeOffset
.
tp_mro
)
;
}
private
static
BorrowedReference
FromObject
(
PyObject
o
)
{
if
(
o
is
null
)
throw
new
ArgumentNullException
(
nameof
(
o
)
)
;
if
(
!
IsType
(
o
)
)
throw
new
ArgumentException
(
"object is not a type"
)
;
return
o
.
Reference
;
}
private
static
StolenReference
FromSpec
(
TypeSpec
spec
,
PyTuple
?
bases
=
null
)
{
if
(
spec
is
null
)
throw
new
ArgumentNullException
(
nameof
(
spec
)
)
;
if
(
(
spec
.
Flags
&
TypeFlags
.
HeapType
)
==
0
)
throw
new
NotSupportedException
(
"Only heap types are supported"
)
;
using
var
nativeSpec
=
new
NativeTypeSpec
(
spec
)
;
var
basesRef
=
bases
is
null
?
default
:
bases
.
Reference
;
var
result
=
Runtime
.
PyType_FromSpecWithBases
(
in
nativeSpec
,
basesRef
)
;
// Runtime.PyErr_Print();
return
result
.
StealOrThrow
(
)
;
}
}
}
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