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ClearScript/ClearScript/Util/UnmanagedMemoryHelpers.cs at master · tlecomte/ClearScript · GitHub
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using
System
;
using
System
.
Collections
.
Generic
;
using
System
.
Runtime
.
InteropServices
;
namespace
Microsoft
.
ClearScript
.
Util
{
internal
static
class
UnmanagedMemoryHelpers
{
private
delegate
ulong
ReadArrayFromUnmanagedMemoryHandler
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
;
private
delegate
ulong
WriteArrayToUnmanagedMemoryHandler
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
;
private
static
readonly
Dictionary
<
Type
,
ReadArrayFromUnmanagedMemoryHandler
>
readArrayFromUnmanagedMemoryHandlerMap
=
new
Dictionary
<
Type
,
ReadArrayFromUnmanagedMemoryHandler
>
{
{
typeof
(
byte
)
,
ReadByteArrayFromUnmanagedMemory
}
,
{
typeof
(
sbyte
)
,
ReadSByteArrayFromUnmanagedMemory
}
,
{
typeof
(
ushort
)
,
ReadUInt16ArrayFromUnmanagedMemory
}
,
{
typeof
(
char
)
,
ReadCharArrayFromUnmanagedMemory
}
,
// blittable because ClearScriptV8's StdChar is char16_t
{
typeof
(
short
)
,
ReadInt16ArrayFromUnmanagedMemory
}
,
{
typeof
(
uint
)
,
ReadUInt32ArrayFromUnmanagedMemory
}
,
{
typeof
(
int
)
,
ReadInt32ArrayFromUnmanagedMemory
}
,
{
typeof
(
long
)
,
ReadInt64ArrayFromUnmanagedMemory
}
,
{
typeof
(
ulong
)
,
ReadUInt64ArrayFromUnmanagedMemory
}
,
{
typeof
(
IntPtr
)
,
ReadIntPtrArrayFromUnmanagedMemory
}
,
{
typeof
(
UIntPtr
)
,
ReadUIntPtrArrayFromUnmanagedMemory
}
,
{
typeof
(
float
)
,
ReadSingleArrayFromUnmanagedMemory
}
,
{
typeof
(
double
)
,
ReadDoubleArrayFromUnmanagedMemory
}
}
;
private
static
readonly
Dictionary
<
Type
,
WriteArrayToUnmanagedMemoryHandler
>
writeArrayToUnmanagedMemoryHandlerMap
=
new
Dictionary
<
Type
,
WriteArrayToUnmanagedMemoryHandler
>
{
{
typeof
(
byte
)
,
WriteByteArrayToUnmanagedMemory
}
,
{
typeof
(
sbyte
)
,
WriteSByteArrayToUnmanagedMemory
}
,
{
typeof
(
ushort
)
,
WriteUInt16ArrayToUnmanagedMemory
}
,
{
typeof
(
char
)
,
WriteCharArrayToUnmanagedMemory
}
,
// blittable because ClearScriptV8's StdChar is char16_t
{
typeof
(
short
)
,
WriteInt16ArrayToUnmanagedMemory
}
,
{
typeof
(
uint
)
,
WriteUInt32ArrayToUnmanagedMemory
}
,
{
typeof
(
int
)
,
WriteInt32ArrayToUnmanagedMemory
}
,
{
typeof
(
long
)
,
WriteInt64ArrayToUnmanagedMemory
}
,
{
typeof
(
ulong
)
,
WriteUInt64ArrayToUnmanagedMemory
}
,
{
typeof
(
IntPtr
)
,
WriteIntPtrArrayToUnmanagedMemory
}
,
{
typeof
(
UIntPtr
)
,
WriteUIntPtrArrayToUnmanagedMemory
}
,
{
typeof
(
float
)
,
WriteSingleArrayToUnmanagedMemory
}
,
{
typeof
(
double
)
,
WriteDoubleArrayToUnmanagedMemory
}
}
;
public
static
ulong
Copy
<
T
>
(
IntPtr
pSource
,
ulong
length
,
T
[
]
destination
,
ulong
destinationIndex
)
{
return
Copy
(
typeof
(
T
)
,
pSource
,
length
,
destination
,
destinationIndex
)
;
}
public
static
ulong
Copy
<
T
>
(
T
[
]
source
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
return
Copy
(
typeof
(
T
)
,
source
,
sourceIndex
,
length
,
pDestination
)
;
}
private
static
ulong
Copy
(
Type
type
,
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
if
(
readArrayFromUnmanagedMemoryHandlerMap
.
TryGetValue
(
type
,
out
var
handler
)
)
{
return
handler
(
pSource
,
length
,
destinationArray
,
destinationIndex
)
;
}
throw
new
NotSupportedException
(
"Unsupported unmanaged data transfer operation"
)
;
}
private
static
ulong
Copy
(
Type
type
,
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
if
(
writeArrayToUnmanagedMemoryHandlerMap
.
TryGetValue
(
type
,
out
var
handler
)
)
{
return
handler
(
sourceArray
,
sourceIndex
,
length
,
pDestination
)
;
}
throw
new
NotSupportedException
(
"Unsupported unmanaged data transfer operation"
)
;
}
private
static
unsafe
ulong
ReadByteArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
byte
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
byte
*
pDest
=
destination
)
{
var
pSrc
=
(
byte
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadSByteArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
sbyte
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
fixed
(
sbyte
*
pDest
=
destination
)
{
var
pSrc
=
(
sbyte
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
ReadUInt16ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
ushort
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
fixed
(
ushort
*
pDest
=
destination
)
{
var
pSrc
=
(
ushort
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
ReadCharArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
char
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
char
*
pDest
=
destination
)
{
var
pSrc
=
(
char
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadInt16ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
short
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
short
*
pDest
=
destination
)
{
var
pSrc
=
(
short
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadUInt32ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
uint
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
fixed
(
uint
*
pDest
=
destination
)
{
var
pSrc
=
(
uint
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
ReadInt32ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
int
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
int
*
pDest
=
destination
)
{
var
pSrc
=
(
int
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadUInt64ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
ulong
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
fixed
(
ulong
*
pDest
=
destination
)
{
var
pSrc
=
(
ulong
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
ReadInt64ArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
long
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
long
*
pDest
=
destination
)
{
var
pSrc
=
(
long
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadUIntPtrArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
UIntPtr
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
fixed
(
UIntPtr
*
pDest
=
destination
)
{
var
pSrc
=
(
UIntPtr
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
ReadIntPtrArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
IntPtr
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
IntPtr
*
pDest
=
destination
)
{
var
pSrc
=
(
IntPtr
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadSingleArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
float
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
float
*
pDest
=
destination
)
{
var
pSrc
=
(
float
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
ReadDoubleArrayFromUnmanagedMemory
(
IntPtr
pSource
,
ulong
length
,
Array
destinationArray
,
ulong
destinationIndex
)
{
var
destinationLength
=
(
ulong
)
destinationArray
.
LongLength
;
if
(
destinationIndex
>=
destinationLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
destinationIndex
)
)
;
}
var
destination
=
(
double
[
]
)
destinationArray
;
length
=
Math
.
Min
(
length
,
destinationLength
-
destinationIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
pSource
,
destination
,
Convert
.
ToInt32
(
destinationIndex
)
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
double
*
pDest
=
destination
)
{
var
pSrc
=
(
double
*
)
pSource
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
destinationIndex
+
index
]
=
pSrc
[
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteByteArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
byte
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
byte
*
pSrc
=
source
)
{
var
pDest
=
(
byte
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteSByteArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
sbyte
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
fixed
(
sbyte
*
pSrc
=
source
)
{
var
pDest
=
(
sbyte
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
WriteUInt16ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
ushort
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
fixed
(
ushort
*
pSrc
=
source
)
{
var
pDest
=
(
ushort
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
WriteCharArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
char
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
char
*
pSrc
=
source
)
{
var
pDest
=
(
char
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteInt16ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
short
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
short
*
pSrc
=
source
)
{
var
pDest
=
(
short
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteUInt32ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
uint
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
fixed
(
uint
*
pSrc
=
source
)
{
var
pDest
=
(
uint
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
WriteInt32ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
int
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
int
*
pSrc
=
source
)
{
var
pDest
=
(
int
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteUInt64ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
ulong
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
fixed
(
ulong
*
pSrc
=
source
)
{
var
pDest
=
(
ulong
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
WriteInt64ArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
long
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
long
*
pSrc
=
source
)
{
var
pDest
=
(
long
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteUIntPtrArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
UIntPtr
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
fixed
(
UIntPtr
*
pSrc
=
source
)
{
var
pDest
=
(
UIntPtr
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
return
length
;
}
private
static
unsafe
ulong
WriteIntPtrArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
IntPtr
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
IntPtr
*
pSrc
=
source
)
{
var
pDest
=
(
IntPtr
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteSingleArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
float
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
float
*
pSrc
=
source
)
{
var
pDest
=
(
float
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
private
static
unsafe
ulong
WriteDoubleArrayToUnmanagedMemory
(
Array
sourceArray
,
ulong
sourceIndex
,
ulong
length
,
IntPtr
pDestination
)
{
var
sourceLength
=
(
ulong
)
sourceArray
.
LongLength
;
if
(
sourceIndex
>=
sourceLength
)
{
throw
new
ArgumentOutOfRangeException
(
nameof
(
sourceIndex
)
)
;
}
var
source
=
(
double
[
]
)
sourceArray
;
length
=
Math
.
Min
(
length
,
sourceLength
-
sourceIndex
)
;
try
{
VerifyMarshalCopyEnabled
(
)
;
Marshal
.
Copy
(
source
,
Convert
.
ToInt32
(
sourceIndex
)
,
pDestination
,
Convert
.
ToInt32
(
length
)
)
;
}
catch
(
OverflowException
)
{
fixed
(
double
*
pSrc
=
source
)
{
var
pDest
=
(
double
*
)
pDestination
;
for
(
var
index
=
0UL
;
index
<
length
;
index
++
)
{
pDest
[
index
]
=
pSrc
[
sourceIndex
+
index
]
;
}
}
}
return
length
;
}
#region unit test support
internal
static
bool
DisableMarshalCopy
;
private
static
void
VerifyMarshalCopyEnabled
(
)
{
if
(
DisableMarshalCopy
)
{
throw
new
OverflowException
(
)
;
}
}
#endregion
}
}
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