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ClearScript/ClearScript/BindSignature.cs at master · bubdm/ClearScript · GitHub
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// Copyright (c) Microsoft Corporation. All rights reserved.
// Licensed under the MIT license.
using
System
;
using
System
.
Reflection
;
namespace
Microsoft
.
ClearScript
{
internal
sealed
class
BindSignature
:
IEquatable
<
BindSignature
>
{
private
readonly
Type
context
;
private
readonly
BindingFlags
flags
;
private
readonly
TargetInfo
targetInfo
;
private
readonly
string
name
;
private
readonly
Type
[
]
typeArgs
;
private
readonly
ArgInfo
[
]
argData
;
public
BindSignature
(
Type
context
,
BindingFlags
flags
,
HostTarget
target
,
string
name
,
Type
[
]
typeArgs
,
object
[
]
args
)
{
this
.
context
=
context
;
this
.
flags
=
flags
;
targetInfo
=
new
TargetInfo
(
target
)
;
this
.
name
=
name
;
this
.
typeArgs
=
typeArgs
;
argData
=
new
ArgInfo
[
args
.
Length
]
;
for
(
var
index
=
0
;
index
<
args
.
Length
;
index
++
)
{
argData
[
index
]
=
new
ArgInfo
(
args
[
index
]
)
;
}
}
#region Object overrides
public
override
bool
Equals
(
object
obj
)
{
return
Equals
(
obj
as
BindSignature
)
;
}
public
override
int
GetHashCode
(
)
{
var
accumulator
=
new
HashAccumulator
(
)
;
accumulator
.
Update
(
context
)
;
accumulator
.
Update
(
(
int
)
flags
)
;
targetInfo
.
UpdateHash
(
ref
accumulator
)
;
accumulator
.
Update
(
name
)
;
foreach
(
var
type
in
typeArgs
)
{
accumulator
.
Update
(
type
)
;
}
foreach
(
var
argInfo
in
argData
)
{
argInfo
.
UpdateHash
(
ref
accumulator
)
;
}
return
accumulator
.
HashCode
;
}
#endregion
#region IEquatable<BindSignature> implementation
public
bool
Equals
(
BindSignature
that
)
{
if
(
that
==
null
)
{
return
false
;
}
if
(
context
!=
that
.
context
)
{
return
false
;
}
if
(
flags
!=
that
.
flags
)
{
return
false
;
}
if
(
!
targetInfo
.
Equals
(
that
.
targetInfo
)
)
{
return
false
;
}
if
(
name
!=
that
.
name
)
{
return
false
;
}
if
(
typeArgs
.
Length
!=
that
.
typeArgs
.
Length
)
{
return
false
;
}
for
(
var
index
=
0
;
index
<
typeArgs
.
Length
;
index
++
)
{
if
(
typeArgs
[
index
]
!=
that
.
typeArgs
[
index
]
)
{
return
false
;
}
}
if
(
argData
.
Length
!=
that
.
argData
.
Length
)
{
return
false
;
}
for
(
var
index
=
0
;
index
<
argData
.
Length
;
index
++
)
{
if
(
!
argData
[
index
]
.
Equals
(
that
.
argData
[
index
]
)
)
{
return
false
;
}
}
return
true
;
}
#endregion
#region Nested type: TargetKind
private
enum
TargetKind
{
Static
,
Null
,
Instance
}
#endregion
#region Nested type: TargetInfo
private
sealed
class
TargetInfo
:
IEquatable
<
TargetInfo
>
{
private
readonly
TargetKind
kind
;
private
readonly
Type
targetType
;
private
readonly
Type
instanceType
;
public
TargetInfo
(
HostTarget
target
)
{
if
(
target
is
HostType
)
{
kind
=
TargetKind
.
Static
;
targetType
=
target
.
Type
;
}
else
if
(
target
.
InvokeTarget
==
null
)
{
kind
=
TargetKind
.
Null
;
targetType
=
target
.
Type
;
}
else
{
kind
=
TargetKind
.
Instance
;
targetType
=
target
.
Type
;
var
tempType
=
target
.
InvokeTarget
.
GetType
(
)
;
if
(
tempType
!=
targetType
)
{
instanceType
=
tempType
;
}
}
}
public
void
UpdateHash
(
ref
HashAccumulator
accumulator
)
{
accumulator
.
Update
(
(
int
)
kind
)
;
accumulator
.
Update
(
targetType
)
;
accumulator
.
Update
(
instanceType
)
;
}
#region Object overrides
public
override
bool
Equals
(
object
obj
)
{
return
Equals
(
obj
as
TargetInfo
)
;
}
public
override
int
GetHashCode
(
)
{
var
accumulator
=
new
HashAccumulator
(
)
;
UpdateHash
(
ref
accumulator
)
;
return
accumulator
.
HashCode
;
}
#endregion
#region IEquatable<TargetInfo> implementation
public
bool
Equals
(
TargetInfo
that
)
{
return
(
that
!=
null
)
&&
(
kind
==
that
.
kind
)
&&
(
targetType
==
that
.
targetType
)
&&
(
instanceType
==
that
.
instanceType
)
;
}
#endregion
}
#endregion
#region Nested type: ArgKind
private
enum
ArgKind
{
Null
,
ByValue
,
Out
,
Ref
}
#endregion
#region Nested type: ArgInfo
private
sealed
class
ArgInfo
:
IEquatable
<
ArgInfo
>
{
private
readonly
ArgKind
kind
;
private
readonly
Type
type
;
public
ArgInfo
(
object
arg
)
{
if
(
arg
==
null
)
{
kind
=
ArgKind
.
Null
;
return
;
}
if
(
arg
is
IOutArg
outArg
)
{
kind
=
ArgKind
.
Out
;
type
=
outArg
.
Type
;
return
;
}
if
(
arg
is
IRefArg
refArg
)
{
kind
=
ArgKind
.
Ref
;
type
=
refArg
.
Type
;
return
;
}
if
(
arg
is
HostType
)
{
kind
=
ArgKind
.
ByValue
;
type
=
typeof
(
HostType
)
;
return
;
}
if
(
arg
is
HostMethod
)
{
kind
=
ArgKind
.
ByValue
;
type
=
typeof
(
HostMethod
)
;
return
;
}
if
(
arg
is
HostIndexedProperty
)
{
kind
=
ArgKind
.
ByValue
;
type
=
typeof
(
HostIndexedProperty
)
;
return
;
}
if
(
arg
is
ScriptMethod
)
{
kind
=
ArgKind
.
ByValue
;
type
=
typeof
(
ScriptMethod
)
;
return
;
}
if
(
arg
is
HostTarget
hostTarget
)
{
kind
=
ArgKind
.
ByValue
;
type
=
hostTarget
.
Type
;
return
;
}
kind
=
ArgKind
.
ByValue
;
type
=
arg
.
GetType
(
)
;
}
public
void
UpdateHash
(
ref
HashAccumulator
accumulator
)
{
accumulator
.
Update
(
(
int
)
kind
)
;
accumulator
.
Update
(
type
)
;
}
#region Object overrides
public
override
bool
Equals
(
object
obj
)
{
return
Equals
(
obj
as
ArgInfo
)
;
}
public
override
int
GetHashCode
(
)
{
var
accumulator
=
new
HashAccumulator
(
)
;
UpdateHash
(
ref
accumulator
)
;
return
accumulator
.
HashCode
;
}
#endregion
#region IEquatable<ArgInfo> implementation
public
bool
Equals
(
ArgInfo
that
)
{
return
(
that
!=
null
)
&&
(
kind
==
that
.
kind
)
&&
(
type
==
that
.
type
)
;
}
#endregion
}
#endregion
#region Nested type: HashAccumulator
private
struct
HashAccumulator
{
public
int
HashCode
{
get
;
private
set
;
}
public
void
Update
(
int
value
)
{
HashCode
=
unchecked
(
(
HashCode
*
31
)
+
value
)
;
}
public
void
Update
(
object
obj
)
{
HashCode
=
unchecked
(
(
HashCode
*
31
)
+
(
obj
?
.
GetHashCode
(
)
??
0
)
)
;
}
}
#endregion
}
}
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