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using
System
;
using
System
.
Collections
;
namespace
Python
.
Runtime
{
/// <summary>
/// Implements a Python type for managed arrays. This type is essentially
/// the same as a ClassObject, except that it provides sequence semantics
/// to support natural array usage (indexing) from Python.
/// </summary>
internal
class
ArrayObject
:
ClassBase
{
internal
ArrayObject
(
Type
tp
)
:
base
(
tp
)
{
}
internal
override
bool
CanSubclass
(
)
{
return
false
;
}
public
static
IntPtr
tp_new
(
IntPtr
tp
,
IntPtr
args
,
IntPtr
kw
)
{
var
self
=
GetManagedObject
(
tp
)
as
ArrayObject
;
if
(
Runtime
.
PyTuple_Size
(
args
)
!=
1
)
{
return
Exceptions
.
RaiseTypeError
(
"array expects 1 argument"
)
;
}
IntPtr
op
=
Runtime
.
PyTuple_GetItem
(
args
,
0
)
;
object
result
;
if
(
!
Converter
.
ToManaged
(
op
,
self
.
type
,
out
result
,
true
)
)
{
return
IntPtr
.
Zero
;
}
return
CLRObject
.
GetInstHandle
(
result
,
tp
)
;
}
/// <summary>
/// Implements __getitem__ for array types.
/// </summary>
public
static
IntPtr
mp_subscript
(
IntPtr
ob
,
IntPtr
idx
)
{
var
obj
=
(
CLRObject
)
GetManagedObject
(
ob
)
;
var
items
=
obj
.
inst
as
Array
;
Type
itemType
=
obj
.
inst
.
GetType
(
)
.
GetElementType
(
)
;
int
rank
=
items
.
Rank
;
int
index
;
object
value
;
// Note that CLR 1.0 only supports int indexes - methods to
// support long indices were introduced in 1.1. We could
// support long indices automatically, but given that long
// indices are not backward compatible and a relative edge
// case, we won't bother for now.
// Single-dimensional arrays are the most common case and are
// cheaper to deal with than multi-dimensional, so check first.
if
(
rank
==
1
)
{
index
=
Runtime
.
PyInt_AsLong
(
idx
)
;
if
(
Exceptions
.
ErrorOccurred
(
)
)
{
return
Exceptions
.
RaiseTypeError
(
"invalid index value"
)
;
}
if
(
index
<
0
)
{
index
=
items
.
Length
+
index
;
}
try
{
value
=
items
.
GetValue
(
index
)
;
}
catch
(
IndexOutOfRangeException
)
{
Exceptions
.
SetError
(
Exceptions
.
IndexError
,
"array index out of range"
)
;
return
IntPtr
.
Zero
;
}
return
Converter
.
ToPython
(
value
,
itemType
)
;
}
// Multi-dimensional arrays can be indexed a la: list[1, 2, 3].
if
(
!
Runtime
.
PyTuple_Check
(
idx
)
)
{
Exceptions
.
SetError
(
Exceptions
.
TypeError
,
"invalid index value"
)
;
return
IntPtr
.
Zero
;
}
var
count
=
Runtime
.
PyTuple_Size
(
idx
)
;
var
args
=
new
int
[
count
]
;
for
(
var
i
=
0
;
i
<
count
;
i
++
)
{
IntPtr
op
=
Runtime
.
PyTuple_GetItem
(
idx
,
i
)
;
index
=
Runtime
.
PyInt_AsLong
(
op
)
;
if
(
Exceptions
.
ErrorOccurred
(
)
)
{
return
Exceptions
.
RaiseTypeError
(
"invalid index value"
)
;
}
if
(
index
<
0
)
{
index
=
items
.
GetLength
(
i
)
+
index
;
}
args
.
SetValue
(
index
,
i
)
;
}
try
{
value
=
items
.
GetValue
(
args
)
;
}
catch
(
IndexOutOfRangeException
)
{
Exceptions
.
SetError
(
Exceptions
.
IndexError
,
"array index out of range"
)
;
return
IntPtr
.
Zero
;
}
return
Converter
.
ToPython
(
value
,
itemType
)
;
}
/// <summary>
/// Implements __setitem__ for array types.
/// </summary>
public
static
int
mp_ass_subscript
(
IntPtr
ob
,
IntPtr
idx
,
IntPtr
v
)
{
var
obj
=
(
CLRObject
)
GetManagedObject
(
ob
)
;
var
items
=
obj
.
inst
as
Array
;
Type
itemType
=
obj
.
inst
.
GetType
(
)
.
GetElementType
(
)
;
int
rank
=
items
.
Rank
;
int
index
;
object
value
;
if
(
items
.
IsReadOnly
)
{
Exceptions
.
RaiseTypeError
(
"array is read-only"
)
;
return
-
1
;
}
if
(
!
Converter
.
ToManaged
(
v
,
itemType
,
out
value
,
true
)
)
{
return
-
1
;
}
if
(
rank
==
1
)
{
index
=
Runtime
.
PyInt_AsLong
(
idx
)
;
if
(
Exceptions
.
ErrorOccurred
(
)
)
{
Exceptions
.
RaiseTypeError
(
"invalid index value"
)
;
return
-
1
;
}
if
(
index
<
0
)
{
index
=
items
.
Length
+
index
;
}
try
{
items
.
SetValue
(
value
,
index
)
;
}
catch
(
IndexOutOfRangeException
)
{
Exceptions
.
SetError
(
Exceptions
.
IndexError
,
"array index out of range"
)
;
return
-
1
;
}
return
0
;
}
if
(
!
Runtime
.
PyTuple_Check
(
idx
)
)
{
Exceptions
.
RaiseTypeError
(
"invalid index value"
)
;
return
-
1
;
}
var
count
=
Runtime
.
PyTuple_Size
(
idx
)
;
var
args
=
new
int
[
count
]
;
for
(
var
i
=
0
;
i
<
count
;
i
++
)
{
IntPtr
op
=
Runtime
.
PyTuple_GetItem
(
idx
,
i
)
;
index
=
Runtime
.
PyInt_AsLong
(
op
)
;
if
(
Exceptions
.
ErrorOccurred
(
)
)
{
Exceptions
.
RaiseTypeError
(
"invalid index value"
)
;
return
-
1
;
}
if
(
index
<
0
)
{
index
=
items
.
GetLength
(
i
)
+
index
;
}
args
.
SetValue
(
index
,
i
)
;
}
try
{
items
.
SetValue
(
value
,
args
)
;
}
catch
(
IndexOutOfRangeException
)
{
Exceptions
.
SetError
(
Exceptions
.
IndexError
,
"array index out of range"
)
;
return
-
1
;
}
return
0
;
}
/// <summary>
/// Implements __contains__ for array types.
/// </summary>
public
static
int
sq_contains
(
IntPtr
ob
,
IntPtr
v
)
{
var
obj
=
(
CLRObject
)
GetManagedObject
(
ob
)
;
Type
itemType
=
obj
.
inst
.
GetType
(
)
.
GetElementType
(
)
;
var
items
=
obj
.
inst
as
IList
;
object
value
;
if
(
!
Converter
.
ToManaged
(
v
,
itemType
,
out
value
,
false
)
)
{
return
0
;
}
if
(
items
.
Contains
(
value
)
)
{
return
1
;
}
return
0
;
}
/// <summary>
/// Implements __len__ for array types.
/// </summary>
public
static
int
mp_length
(
IntPtr
ob
)
{
var
self
=
(
CLRObject
)
GetManagedObject
(
ob
)
;
var
items
=
self
.
inst
as
Array
;
return
items
.
Length
;
}
}
}
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