Vba je specifická bitová sada v long integer
Příklady kódu
vba je specifická bitová sada v long integer
'Extremely fast VBA function to test if a specified bit is set
'within a 32-bit Long integer.
'Bits are numbered from 0 to 31, so the first (least significant) bit
'is bit 0.
'Note: we do not inspect bit 31, the sign bit.
'Note: any number of bits can be specified in one call.
Function LongBitIsSet(theLong&, bit As Byte) As Boolean
Static i&, b&()
If (Not Not b) = 0 Then
ReDim b(0 To 30)
For i = 0 To 30
b(i) = 2 ^ i
Next
End If
If bit < 31 Then LongBitIsSet = theLong And b(bit)
End Function
'------------------------------------------------------------------
MsgBox LongBitIsSet(255, 7) '<--displays: True
MsgBox LongBitIsSet(230, 0) '<--displays: False
MsgBox LongBitIsSet(16384, 14) '<--displays: True
MsgBox LongBitIsSet(-16383, 0) '<--displays: True
MsgBox LongBitIsSet(&H7FFFFFFF, 0) '<--displays: True
VBA bitů na celé číslo
'Extremely fast VBA function to convert a binary string to a 16-bit Integer:
Function BitsToInteger%(bits$)
Dim i&
Static b() As Byte
If LenB(bits) > 32 Then Exit Function
If LenB(bits) = 32 Then
b = bits
Else
b = String$(16 - Len(bits), "0") & bits
End If
For i = 2 To 30 Step 2
BitsToInteger = 2 * BitsToInteger Or (b(i) Xor 48)
Next
If (b(0) Xor 48) Then BitsToInteger = BitsToInteger Or &H8000
End Function
'Example:
MsgBox BitsToInteger("1111111111111111") '<--displays: -1
MsgBox BitsToInteger("0111111111111111") '<--displays: 32767
excel VBA vysoké slovo z Long Integer
'If n is a 4-byte Long Integer, the Low (Left) Word is:
If n And &H8000& Then
LoWord = n Or &HFFFF0000
Else
LoWord = n And &HFFFF&
End If
'If n is a 4-byte Long Integer, the High (Right) Word is:
HiWord = (n And &HFFFF0000) \ &H10000
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