FloatPTR - Learn To Code - PlayBASIC Documentation

FloatPTR

FloatPointer = FloatPTR(Pointer)

Parameters:

Pointer = The Pointer Data Type you wish to recast

Returns:

FloatPointer = Returns the recast input value as a new pointer

FloatPTR will explicitly recast the supplied pointer to a Float Pointer.

FACTS:

* Typed pointers like Byte/Word/Integer and Float can only read/write values of matching data type.

* Additions / Subtraction to typed pointers with be automatically scale to the pointers data width.

Mini Tutorial:

This Example declares an generic pointer, then dynamically recasts it to read different data types from memory.

; Allocate a bank and get it's address
  BufferAddress=GetBankPtr(NewBank(1000))


  Dim GenericPointer As Pointer

; Write sopme data into this memory
  GenericPointer=BUfferAddress
  *GenericPointer = $12345678
  GenericPointer=GenericPointer+4
  *GenericPointer = 123.456

; Reset pointer to the start of the buffer address
  GenericPointer=BUfferAddress

; read the typed values from this generic pointer by recasting them
  Print Hex$(*BytePtr(GenericPOinter))
  Print Hex$(*WordPtr(GenericPOinter))
  Print Hex$(*IntPtr(GenericPOinter))
  Print *FloatPtr(GenericPOinter+4)

  Sync
  WaitKey

This example would output.

  $00000078
  $00005678
  $12345678
  123.456


Related Info:	BytePTR \| Dim \| Float \| Int \| IntPTR \| Pointer \| Types \| WordPTR :