Visual Basic For Applications | Array Functions - Insert Element | Remove ElementFunctional FrameworkRemove...
How did Doctor Strange see the winning outcome in Avengers: Infinity War?
How do I go from 300 unfinished/half written blog posts, to published posts?
Different result between scanning in Epson's "color negative film" mode and scanning in positive -> invert curve in post?
Pre-amplifier input protection
Implement the Thanos sorting algorithm
Is oxalic acid dihydrate considered a primary acid standard in analytical chemistry?
What is the opposite of 'gravitas'?
Sort a list by elements of another list
Valid Badminton Score?
Type int? vs type int
Is this apparent Class Action settlement a spam message?
Tiptoe or tiphoof? Adjusting words to better fit fantasy races
How to safely derail a train during transit?
Integer addition + constant, is it a group?
Did Dumbledore lie to Harry about how long he had James Potter's invisibility cloak when he was examining it? If so, why?
Why didn't Theresa May consult with Parliament before negotiating a deal with the EU?
Proof of work - lottery approach
Is HostGator storing my password in plaintext?
Is there a good way to store credentials outside of a password manager?
Is the destination of a commercial flight important for the pilot?
Hostile work environment after whistle-blowing on coworker and our boss. What do I do?
Why escape if the_content isnt?
India just shot down a satellite from the ground. At what altitude range is the resulting debris field?
Escape a backup date in a file name
Visual Basic For Applications | Array Functions - Insert Element | Remove Element
Functional FrameworkRemove an element from an arrayTest for Array vs Range in my TEXTJOIN UDFExcel: displaying an array, works fast for one array, slow for anotherRetrieve, remove duplicates and total ingredients into arrayMapping one array onto another where columns from first array become rows in second arrayPerformance of generic VS non-generic method (array generating function)Vba to create a new column and insert array formulaVisual Basic For Applications - Array Functions - Push | Pop | Shift | UnshiftPublic Function to remove empty or “” elements from a single dimension array
0
$begingroup$
An extension to array functions I am building for my snake game. This one allows you to remove / insert particular elements.
API CALLS
Private Declare PtrSafe Function VarPtrArray Lib "VBE7" Alias "VarPtr" _
(ByRef Var() As Any) As LongPtr
Private Declare PtrSafe Sub CopyMemoryI Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByVal dst As LongPtr, ByVal src As LongPtr, ByVal Length As Long)
Private Declare PtrSafe Sub CopyMemoryII Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByRef dst As SAFEARRAY, ByVal src As LongPtr, ByVal Length As Long)
DATA STRUCTS
Private Type SAFEARRAY_BOUND
cElements As Long
lLbound As Long
End Type
Private Type SAFEARRAY
cDims As Integer
fFeatures As Integer
cbElements As Long
cLocks As Long
pvData As LongPtr
rgsabound(0) As SAFEARRAY_BOUND
End Type
Private Type SnakePart
Column As Long
Row As Long
End Type
FUNCTIONS
Private Function ArrayInsertElement(ByRef ArrayOriginal() As SnakePart, ByRef ElementToAdd As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) + 1
ReDim ArrayInsertElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (NewLength - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position, SNAKEPART_BYTELENGTH), VarPtr(ElementToAdd), SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position + 1, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayRemoveElement(ByRef ArrayOriginal() As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) - 1
ReDim ArrayRemoveElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (UBound(ArrayOriginal) - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, Position, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position + 1, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayElementGetPointer(ByRef Arr() As SnakePart, ByVal ElementIndex As Long, ByVal ElementByteLength As Long) As LongPtr
Dim ptrToArrayVar As LongPtr
Dim ptrToSafeArray As LongPtr
Dim ptrToArrayData As LongPtr
Dim ptrCursor As LongPtr
Dim uSAFEARRAY As SAFEARRAY
' Get Pointer To Array *Variable*
ptrToArrayVar = VarPtrArray(Arr)
' Get Pointer To Array Variable *SAFEARRAY* By Directly Reading Array Variable
CopyMemoryI VarPtr(ptrToSafeArray), ptrToArrayVar, 8
' Read The SAFEARRAY Structure
CopyMemoryII uSAFEARRAY, ptrToSafeArray, LenB(uSAFEARRAY)
' Get Pointer To Array Data
ptrToArrayData = uSAFEARRAY.pvData
' Get Pointer To Array Element
ptrCursor = ptrToArrayData + (ElementIndex * ElementByteLength)
ArrayElementGetPointer = ptrCursor
End Function
TESTS
Private Sub ArrayInsertElementTest()
Dim x(3) As SnakePart
Dim sp As SnakePart
sp.Column = 1
sp.Row = 1
x(0) = sp
x(1) = sp
x(2) = sp
x(3) = sp
Debug.Print x(0).Column = 1
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 1
Debug.Print x(3).Column = 1
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
sp.Column = 2
sp.Row = 2
temparry = ArrayInsertElement(temparry, sp, 2)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 1
Debug.Print "_______________________"
sp.Column = 4
sp.Row = 4
temparry = ArrayInsertElement(temparry, sp, 4)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 4
Debug.Print temparry(5).Column = 1
Debug.Print "_______________________"
sp.Column = 0
sp.Row = 0
temparry = ArrayInsertElement(temparry, sp, 0)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 1
Debug.Print temparry(3).Column = 2
Debug.Print temparry(4).Column = 1
Debug.Print temparry(5).Column = 4
Debug.Print temparry(6).Column = 1
Debug.Print "_______________________"
End Sub
Private Sub ArrayRemoveElementTest()
Dim x(5) As SnakePart
Dim sp As SnakePart
sp.Column = 0
sp.Row = 0
x(0) = sp
sp.Column = 1
sp.Row = 1
x(1) = sp
sp.Column = 2
sp.Row = 2
x(2) = sp
sp.Column = 3
sp.Row = 3
x(3) = sp
sp.Column = 4
sp.Row = 4
x(4) = sp
sp.Column = 5
sp.Row = 5
x(5) = sp
Debug.Print x(0).Column = 0
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 2
Debug.Print x(3).Column = 3
Debug.Print x(4).Column = 4
Debug.Print x(5).Column = 5
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
temparry = ArrayRemoveElement(temparry, 4)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 3
Debug.Print temparry(4).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 2)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 3
Debug.Print temparry(3).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 1)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 3
Debug.Print temparry(2).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 0)
Debug.Print temparry(0).Column = 3
Debug.Print temparry(1).Column = 5
Debug.Print "_______________________"
End Sub
performance vba excel winapi
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
$endgroup$
add a comment |
0
$begingroup$
An extension to array functions I am building for my snake game. This one allows you to remove / insert particular elements.
API CALLS
Private Declare PtrSafe Function VarPtrArray Lib "VBE7" Alias "VarPtr" _
(ByRef Var() As Any) As LongPtr
Private Declare PtrSafe Sub CopyMemoryI Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByVal dst As LongPtr, ByVal src As LongPtr, ByVal Length As Long)
Private Declare PtrSafe Sub CopyMemoryII Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByRef dst As SAFEARRAY, ByVal src As LongPtr, ByVal Length As Long)
DATA STRUCTS
Private Type SAFEARRAY_BOUND
cElements As Long
lLbound As Long
End Type
Private Type SAFEARRAY
cDims As Integer
fFeatures As Integer
cbElements As Long
cLocks As Long
pvData As LongPtr
rgsabound(0) As SAFEARRAY_BOUND
End Type
Private Type SnakePart
Column As Long
Row As Long
End Type
FUNCTIONS
Private Function ArrayInsertElement(ByRef ArrayOriginal() As SnakePart, ByRef ElementToAdd As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) + 1
ReDim ArrayInsertElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (NewLength - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position, SNAKEPART_BYTELENGTH), VarPtr(ElementToAdd), SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position + 1, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayRemoveElement(ByRef ArrayOriginal() As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) - 1
ReDim ArrayRemoveElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (UBound(ArrayOriginal) - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, Position, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position + 1, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayElementGetPointer(ByRef Arr() As SnakePart, ByVal ElementIndex As Long, ByVal ElementByteLength As Long) As LongPtr
Dim ptrToArrayVar As LongPtr
Dim ptrToSafeArray As LongPtr
Dim ptrToArrayData As LongPtr
Dim ptrCursor As LongPtr
Dim uSAFEARRAY As SAFEARRAY
' Get Pointer To Array *Variable*
ptrToArrayVar = VarPtrArray(Arr)
' Get Pointer To Array Variable *SAFEARRAY* By Directly Reading Array Variable
CopyMemoryI VarPtr(ptrToSafeArray), ptrToArrayVar, 8
' Read The SAFEARRAY Structure
CopyMemoryII uSAFEARRAY, ptrToSafeArray, LenB(uSAFEARRAY)
' Get Pointer To Array Data
ptrToArrayData = uSAFEARRAY.pvData
' Get Pointer To Array Element
ptrCursor = ptrToArrayData + (ElementIndex * ElementByteLength)
ArrayElementGetPointer = ptrCursor
End Function
TESTS
Private Sub ArrayInsertElementTest()
Dim x(3) As SnakePart
Dim sp As SnakePart
sp.Column = 1
sp.Row = 1
x(0) = sp
x(1) = sp
x(2) = sp
x(3) = sp
Debug.Print x(0).Column = 1
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 1
Debug.Print x(3).Column = 1
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
sp.Column = 2
sp.Row = 2
temparry = ArrayInsertElement(temparry, sp, 2)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 1
Debug.Print "_______________________"
sp.Column = 4
sp.Row = 4
temparry = ArrayInsertElement(temparry, sp, 4)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 4
Debug.Print temparry(5).Column = 1
Debug.Print "_______________________"
sp.Column = 0
sp.Row = 0
temparry = ArrayInsertElement(temparry, sp, 0)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 1
Debug.Print temparry(3).Column = 2
Debug.Print temparry(4).Column = 1
Debug.Print temparry(5).Column = 4
Debug.Print temparry(6).Column = 1
Debug.Print "_______________________"
End Sub
Private Sub ArrayRemoveElementTest()
Dim x(5) As SnakePart
Dim sp As SnakePart
sp.Column = 0
sp.Row = 0
x(0) = sp
sp.Column = 1
sp.Row = 1
x(1) = sp
sp.Column = 2
sp.Row = 2
x(2) = sp
sp.Column = 3
sp.Row = 3
x(3) = sp
sp.Column = 4
sp.Row = 4
x(4) = sp
sp.Column = 5
sp.Row = 5
x(5) = sp
Debug.Print x(0).Column = 0
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 2
Debug.Print x(3).Column = 3
Debug.Print x(4).Column = 4
Debug.Print x(5).Column = 5
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
temparry = ArrayRemoveElement(temparry, 4)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 3
Debug.Print temparry(4).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 2)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 3
Debug.Print temparry(3).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 1)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 3
Debug.Print temparry(2).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 0)
Debug.Print temparry(0).Column = 3
Debug.Print temparry(1).Column = 5
Debug.Print "_______________________"
End Sub
performance vba excel winapi
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
$endgroup$
add a comment |
0
0
0
$begingroup$
An extension to array functions I am building for my snake game. This one allows you to remove / insert particular elements.
API CALLS
Private Declare PtrSafe Function VarPtrArray Lib "VBE7" Alias "VarPtr" _
(ByRef Var() As Any) As LongPtr
Private Declare PtrSafe Sub CopyMemoryI Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByVal dst As LongPtr, ByVal src As LongPtr, ByVal Length As Long)
Private Declare PtrSafe Sub CopyMemoryII Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByRef dst As SAFEARRAY, ByVal src As LongPtr, ByVal Length As Long)
DATA STRUCTS
Private Type SAFEARRAY_BOUND
cElements As Long
lLbound As Long
End Type
Private Type SAFEARRAY
cDims As Integer
fFeatures As Integer
cbElements As Long
cLocks As Long
pvData As LongPtr
rgsabound(0) As SAFEARRAY_BOUND
End Type
Private Type SnakePart
Column As Long
Row As Long
End Type
FUNCTIONS
Private Function ArrayInsertElement(ByRef ArrayOriginal() As SnakePart, ByRef ElementToAdd As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) + 1
ReDim ArrayInsertElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (NewLength - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position, SNAKEPART_BYTELENGTH), VarPtr(ElementToAdd), SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position + 1, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayRemoveElement(ByRef ArrayOriginal() As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) - 1
ReDim ArrayRemoveElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (UBound(ArrayOriginal) - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, Position, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position + 1, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayElementGetPointer(ByRef Arr() As SnakePart, ByVal ElementIndex As Long, ByVal ElementByteLength As Long) As LongPtr
Dim ptrToArrayVar As LongPtr
Dim ptrToSafeArray As LongPtr
Dim ptrToArrayData As LongPtr
Dim ptrCursor As LongPtr
Dim uSAFEARRAY As SAFEARRAY
' Get Pointer To Array *Variable*
ptrToArrayVar = VarPtrArray(Arr)
' Get Pointer To Array Variable *SAFEARRAY* By Directly Reading Array Variable
CopyMemoryI VarPtr(ptrToSafeArray), ptrToArrayVar, 8
' Read The SAFEARRAY Structure
CopyMemoryII uSAFEARRAY, ptrToSafeArray, LenB(uSAFEARRAY)
' Get Pointer To Array Data
ptrToArrayData = uSAFEARRAY.pvData
' Get Pointer To Array Element
ptrCursor = ptrToArrayData + (ElementIndex * ElementByteLength)
ArrayElementGetPointer = ptrCursor
End Function
TESTS
Private Sub ArrayInsertElementTest()
Dim x(3) As SnakePart
Dim sp As SnakePart
sp.Column = 1
sp.Row = 1
x(0) = sp
x(1) = sp
x(2) = sp
x(3) = sp
Debug.Print x(0).Column = 1
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 1
Debug.Print x(3).Column = 1
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
sp.Column = 2
sp.Row = 2
temparry = ArrayInsertElement(temparry, sp, 2)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 1
Debug.Print "_______________________"
sp.Column = 4
sp.Row = 4
temparry = ArrayInsertElement(temparry, sp, 4)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 4
Debug.Print temparry(5).Column = 1
Debug.Print "_______________________"
sp.Column = 0
sp.Row = 0
temparry = ArrayInsertElement(temparry, sp, 0)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 1
Debug.Print temparry(3).Column = 2
Debug.Print temparry(4).Column = 1
Debug.Print temparry(5).Column = 4
Debug.Print temparry(6).Column = 1
Debug.Print "_______________________"
End Sub
Private Sub ArrayRemoveElementTest()
Dim x(5) As SnakePart
Dim sp As SnakePart
sp.Column = 0
sp.Row = 0
x(0) = sp
sp.Column = 1
sp.Row = 1
x(1) = sp
sp.Column = 2
sp.Row = 2
x(2) = sp
sp.Column = 3
sp.Row = 3
x(3) = sp
sp.Column = 4
sp.Row = 4
x(4) = sp
sp.Column = 5
sp.Row = 5
x(5) = sp
Debug.Print x(0).Column = 0
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 2
Debug.Print x(3).Column = 3
Debug.Print x(4).Column = 4
Debug.Print x(5).Column = 5
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
temparry = ArrayRemoveElement(temparry, 4)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 3
Debug.Print temparry(4).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 2)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 3
Debug.Print temparry(3).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 1)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 3
Debug.Print temparry(2).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 0)
Debug.Print temparry(0).Column = 3
Debug.Print temparry(1).Column = 5
Debug.Print "_______________________"
End Sub
performance vba excel winapi
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
$endgroup$
An extension to array functions I am building for my snake game. This one allows you to remove / insert particular elements.
API CALLS
Private Declare PtrSafe Function VarPtrArray Lib "VBE7" Alias "VarPtr" _
(ByRef Var() As Any) As LongPtr
Private Declare PtrSafe Sub CopyMemoryI Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByVal dst As LongPtr, ByVal src As LongPtr, ByVal Length As Long)
Private Declare PtrSafe Sub CopyMemoryII Lib "kernel32.dll" Alias "RtlMoveMemory" _
(ByRef dst As SAFEARRAY, ByVal src As LongPtr, ByVal Length As Long)
DATA STRUCTS
Private Type SAFEARRAY_BOUND
cElements As Long
lLbound As Long
End Type
Private Type SAFEARRAY
cDims As Integer
fFeatures As Integer
cbElements As Long
cLocks As Long
pvData As LongPtr
rgsabound(0) As SAFEARRAY_BOUND
End Type
Private Type SnakePart
Column As Long
Row As Long
End Type
FUNCTIONS
Private Function ArrayInsertElement(ByRef ArrayOriginal() As SnakePart, ByRef ElementToAdd As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) + 1
ReDim ArrayInsertElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (NewLength - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position, SNAKEPART_BYTELENGTH), VarPtr(ElementToAdd), SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayInsertElement, Position + 1, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayRemoveElement(ByRef ArrayOriginal() As SnakePart, ByRef Position As Long) As SnakePart()
Dim NewLength As Long
Dim CopiedBytesFirstSection As Long
Dim CopiedBytesSecondSection As Long
NewLength = UBound(ArrayOriginal) - 1
ReDim ArrayRemoveElement(NewLength)
CopiedBytesFirstSection = Position * SNAKEPART_BYTELENGTH
CopiedBytesSecondSection = (UBound(ArrayOriginal) - Position) * SNAKEPART_BYTELENGTH
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, 0, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, 0, SNAKEPART_BYTELENGTH), CopiedBytesFirstSection
CopyMemoryI ArrayElementGetPointer(ArrayRemoveElement, Position, SNAKEPART_BYTELENGTH), ArrayElementGetPointer(ArrayOriginal, Position + 1, SNAKEPART_BYTELENGTH), CopiedBytesSecondSection
End Function
Private Function ArrayElementGetPointer(ByRef Arr() As SnakePart, ByVal ElementIndex As Long, ByVal ElementByteLength As Long) As LongPtr
Dim ptrToArrayVar As LongPtr
Dim ptrToSafeArray As LongPtr
Dim ptrToArrayData As LongPtr
Dim ptrCursor As LongPtr
Dim uSAFEARRAY As SAFEARRAY
' Get Pointer To Array *Variable*
ptrToArrayVar = VarPtrArray(Arr)
' Get Pointer To Array Variable *SAFEARRAY* By Directly Reading Array Variable
CopyMemoryI VarPtr(ptrToSafeArray), ptrToArrayVar, 8
' Read The SAFEARRAY Structure
CopyMemoryII uSAFEARRAY, ptrToSafeArray, LenB(uSAFEARRAY)
' Get Pointer To Array Data
ptrToArrayData = uSAFEARRAY.pvData
' Get Pointer To Array Element
ptrCursor = ptrToArrayData + (ElementIndex * ElementByteLength)
ArrayElementGetPointer = ptrCursor
End Function
TESTS
Private Sub ArrayInsertElementTest()
Dim x(3) As SnakePart
Dim sp As SnakePart
sp.Column = 1
sp.Row = 1
x(0) = sp
x(1) = sp
x(2) = sp
x(3) = sp
Debug.Print x(0).Column = 1
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 1
Debug.Print x(3).Column = 1
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
sp.Column = 2
sp.Row = 2
temparry = ArrayInsertElement(temparry, sp, 2)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 1
Debug.Print "_______________________"
sp.Column = 4
sp.Row = 4
temparry = ArrayInsertElement(temparry, sp, 4)
Debug.Print temparry(0).Column = 1
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 1
Debug.Print temparry(4).Column = 4
Debug.Print temparry(5).Column = 1
Debug.Print "_______________________"
sp.Column = 0
sp.Row = 0
temparry = ArrayInsertElement(temparry, sp, 0)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 1
Debug.Print temparry(3).Column = 2
Debug.Print temparry(4).Column = 1
Debug.Print temparry(5).Column = 4
Debug.Print temparry(6).Column = 1
Debug.Print "_______________________"
End Sub
Private Sub ArrayRemoveElementTest()
Dim x(5) As SnakePart
Dim sp As SnakePart
sp.Column = 0
sp.Row = 0
x(0) = sp
sp.Column = 1
sp.Row = 1
x(1) = sp
sp.Column = 2
sp.Row = 2
x(2) = sp
sp.Column = 3
sp.Row = 3
x(3) = sp
sp.Column = 4
sp.Row = 4
x(4) = sp
sp.Column = 5
sp.Row = 5
x(5) = sp
Debug.Print x(0).Column = 0
Debug.Print x(1).Column = 1
Debug.Print x(2).Column = 2
Debug.Print x(3).Column = 3
Debug.Print x(4).Column = 4
Debug.Print x(5).Column = 5
Debug.Print "_______________________"
Dim temparry() As SnakePart
temparry = x
temparry = ArrayRemoveElement(temparry, 4)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 2
Debug.Print temparry(3).Column = 3
Debug.Print temparry(4).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 2)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 1
Debug.Print temparry(2).Column = 3
Debug.Print temparry(3).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 1)
Debug.Print temparry(0).Column = 0
Debug.Print temparry(1).Column = 3
Debug.Print temparry(2).Column = 5
Debug.Print "_______________________"
temparry = ArrayRemoveElement(temparry, 0)
Debug.Print temparry(0).Column = 3
Debug.Print temparry(1).Column = 5
Debug.Print "_______________________"
End Sub
performance vba excel winapi
performance vba excel winapi
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
asked 6 mins ago
learnAsWeGolearnAsWeGo
2837
2837
add a comment |
add a comment |
0
active
oldest
votes
Your Answer
StackExchange.ifUsing("editor", function () {
return StackExchange.using("mathjaxEditing", function () {
StackExchange.MarkdownEditor.creationCallbacks.add(function (editor, postfix) {
StackExchange.mathjaxEditing.prepareWmdForMathJax(editor, postfix, [["\$", "\$"]]);
});
});
}, "mathjax-editing");
StackExchange.ifUsing("editor", function () {
StackExchange.using("externalEditor", function () {
StackExchange.using("snippets", function () {
StackExchange.snippets.init();
});
});
}, "code-snippets");
StackExchange.ready(function() {
var channelOptions = {
tags: "".split(" "),
id: "196"
};
initTagRenderer("".split(" "), "".split(" "), channelOptions);
StackExchange.using("externalEditor", function() {
// Have to fire editor after snippets, if snippets enabled
if (StackExchange.settings.snippets.snippetsEnabled) {
StackExchange.using("snippets", function() {
createEditor();
});
}
else {
createEditor();
}
});
function createEditor() {
StackExchange.prepareEditor({
heartbeatType: 'answer',
autoActivateHeartbeat: false,
convertImagesToLinks: false,
noModals: true,
showLowRepImageUploadWarning: true,
reputationToPostImages: null,
bindNavPrevention: true,
postfix: "",
imageUploader: {
brandingHtml: "Powered by u003ca class="icon-imgur-white" href="https://imgur.com/"u003eu003c/au003e",
contentPolicyHtml: "User contributions licensed under u003ca href="https://creativecommons.org/licenses/by-sa/3.0/"u003ecc by-sa 3.0 with attribution requiredu003c/au003e u003ca href="https://stackoverflow.com/legal/content-policy"u003e(content policy)u003c/au003e",
allowUrls: true
},
onDemand: true,
discardSelector: ".discard-answer"
,immediatelyShowMarkdownHelp:true
});
}
});
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f216385%2fvisual-basic-for-applications-array-functions-insert-element-remove-elemen%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
0
active
oldest
votes
0
active
oldest
votes
active
oldest
votes
active
oldest
votes
draft saved
draft discarded
Thanks for contributing an answer to Code Review Stack Exchange!
- Please be sure to answer the question. Provide details and share your research!
But avoid …
- Asking for help, clarification, or responding to other answers.
- Making statements based on opinion; back them up with references or personal experience.
Use MathJax to format equations. MathJax reference.
To learn more, see our tips on writing great answers.
draft saved
draft discarded
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
StackExchange.ready(
function () {
StackExchange.openid.initPostLogin('.new-post-login', 'https%3a%2f%2fcodereview.stackexchange.com%2fquestions%2f216385%2fvisual-basic-for-applications-array-functions-insert-element-remove-elemen%23new-answer', 'question_page');
}
);
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Sign up or log in
StackExchange.ready(function () {
StackExchange.helpers.onClickDraftSave('#login-link');
});
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Sign up using Google
Sign up using Facebook
Sign up using Email and Password
Post as a guest
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
Required, but never shown
