Fills a memory area with a specified value.
MemBFill[(] addr, count, value [)] MemWFill[(] addr, count, value [)] MemLFill[(] addr, count, value [)]
MemSet[(] addr, count, value [)]
MemZero[(] addr, count [)]
| addr | : address |
| count | : Int32 expression |
| value | : byte, Int16 or Int32 expression |
All these commands fill a memory area, starting from the address addr, with count occurences of a particular value; in the case of MemZero, this value is always zero, whereas with the rest it can be specified in the value parameter.
MemBFill, MemSet and MemZero all write the value as a byte, while MemWFill writes it as a 16-bit Integer and MemLFill as a 32-bit Integer.
With all these commands, the parameters can be enclosed in brackets or not as desired.
Local addr% = mAlloc(200)
MemBFill addr%, 200, 2
MemSet addr%, 200, 1
MemZero addr%, 200
MemWFill addr%, 100, 102
MemLFill addr%, 50, 15677
One use for all these commands is to fill an array, but ArrayFill is much better suited, as shown below:
Local a%(1 To 200), n%, t#
t# = Timer
For n% = 1 To 10000 : MemLFill V:a%(1), 200, 2 : Next n
Trace a%(1)
Debug "MemLFill time:" & Timer - t#
t# = Timer
For n% = 1 To 10000 : ArrayFill a%(), 2 : Next n
Debug "ArrayFill time:" & Timer - t#
Trace a%(1)
Debug.Show
{Created by Sjouke Hamstra; Last updated: 02/03/2017 by James Gaite}