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pythonnet/src/runtime/Util.cs at skip-while-initializing · QSLee-Net/pythonnet · GitHub
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runtime
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Util.cs
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#nullable enable
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
IO
;
using
System
.
Runtime
.
InteropServices
;
namespace
Python
.
Runtime
{
internal
static
class
Util
{
internal
const
string
UnstableApiMessage
=
"This API is unstable, and might be changed or removed in the next minor release"
;
internal
const
string
MinimalPythonVersionRequired
=
"Only Python 3.5 or newer is supported"
;
internal
const
string
InternalUseOnly
=
"This API is for internal use only"
;
internal
const
string
UseOverloadWithReferenceTypes
=
"This API is unsafe, and will be removed in the future. Use overloads working with *Reference types"
;
internal
static
Int64
ReadCLong
(
IntPtr
tp
,
int
offset
)
{
// On Windows, a C long is always 32 bits.
if
(
Runtime
.
IsWindows
||
Runtime
.
Is32Bit
)
{
return
Marshal
.
ReadInt32
(
tp
,
offset
)
;
}
else
{
return
Marshal
.
ReadInt64
(
tp
,
offset
)
;
}
}
internal
static
void
WriteCLong
(
IntPtr
type
,
int
offset
,
Int64
flags
)
{
if
(
Runtime
.
IsWindows
||
Runtime
.
Is32Bit
)
{
Marshal
.
WriteInt32
(
type
,
offset
,
(
Int32
)
(
flags
&
0xffffffffL
)
)
;
}
else
{
Marshal
.
WriteInt64
(
type
,
offset
,
flags
)
;
}
}
/// <summary>
/// Null-coalesce: if <paramref name="primary"/> parameter is not
/// <see cref="IntPtr.Zero"/>, return it. Otherwise return <paramref name="fallback"/>.
/// </summary>
internal
static
IntPtr
Coalesce
(
this
IntPtr
primary
,
IntPtr
fallback
)
=>
primary
==
IntPtr
.
Zero
?
fallback
:
primary
;
/// <summary>
/// Gets substring after last occurrence of <paramref name="symbol"/>
/// </summary>
internal
static
string
?
AfterLast
(
this
string
str
,
char
symbol
)
{
if
(
str
is
null
)
throw
new
ArgumentNullException
(
nameof
(
str
)
)
;
int
last
=
str
.
LastIndexOf
(
symbol
)
;
return
last
>=
0
?
str
.
Substring
(
last
+
1
)
:
null
;
}
internal
static
string
ReadStringResource
(
this
System
.
Reflection
.
Assembly
assembly
,
string
resourceName
)
{
if
(
assembly
is
null
)
throw
new
ArgumentNullException
(
nameof
(
assembly
)
)
;
if
(
string
.
IsNullOrEmpty
(
resourceName
)
)
throw
new
ArgumentNullException
(
nameof
(
resourceName
)
)
;
using
var
stream
=
assembly
.
GetManifestResourceStream
(
resourceName
)
;
using
var
reader
=
new
StreamReader
(
stream
)
;
return
reader
.
ReadToEnd
(
)
;
}
public
static
IEnumerator
<
T
>
GetEnumerator
<
T
>
(
this
IEnumerator
<
T
>
enumerator
)
=>
enumerator
;
}
}
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