_MEMFILL - QB64Official/qb64 GitHub Wiki

The _MEMFILL statement converts a value to a specified type, then fills memory with that type including any non-whole remainder.

Syntax

_MEMFILL memoryBlock, memoryBlock.OFFSET, fillBytes, value [AS variableType]

Parameter(s)

  • The memoryBlock _MEM memory block is the block referenced to be filled.
  • memoryBlock.OFFSET is the starting offset of the above referenced memory block.
  • The fillBytes is the number of bytes to fill the memory block.
  • The value is the value to place in the memory block at the designated OFFSET position.
  • A literal or variable value can be optionally set AS a variable Variable Types appropriate for the memory block.

Description

  • To clear previous data from a _MEMNEW memory block, use _MEMFILL with a value of 0.

Example(s)

Filling array values quickly using FOR loops or a simple memory fill.


DIM a(100, 100) AS LONG
DIM b(100, 100) AS LONG

'filling array a with value 13
FOR i1 = 0 TO 100
    FOR i2 = 0 TO 100
        a(i1, i2) = 13
    NEXT
NEXT

'filling array b with value 13
DIM mema AS _MEM
mema = _MEM(b())
_MEMFILL mema, mema.OFFSET, mema.SIZE, 13 AS LONG
_MEMFREE mema

See Also