MEMFILL: Difference between revisions
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{{ | {{PageParameters}} | ||
* The {{Parameter|memoryBlock}} [[_MEM]] memory block is the block referenced to be filled. | * The {{Parameter|memoryBlock}} [[_MEM]] memory block is the block referenced to be filled. | ||
* {{Parameter|memoryBlock.OFFSET}} is the starting offset of the above referenced memory block. | * {{Parameter|memoryBlock.OFFSET}} is the starting offset of the above referenced memory block. | ||
* The {{Parameter|fillBytes}} is the number of bytes to fill the memory block. | * The {{Parameter|fillBytes}} is the number of bytes to fill the memory block. | ||
* The {{Parameter|value}} is the value to place in the memory block at the designated OFFSET position. | * The {{Parameter|value}} is the value to place in the memory block at the designated OFFSET position. | ||
* A literal or variable {{Parameter|value}} can be optionally set [[AS]] a variable [[type]] appropriate for the memory block. | * A literal or variable {{Parameter|value}} can be optionally set [[AS]] a variable [[Variable Types|type]] appropriate for the memory block. | ||
Latest revision as of 20:26, 26 January 2024
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]
Parameters
- 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 type appropriate for the memory block.
Description
- To clear previous data from a _MEMNEW memory block, use _MEMFILL with a value of 0.
Examples
Example: 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