CLL SCAN is probably the routine that gets called from the SCAN function. It can be useful to call explicitly when
do i=1 to countw(string);
w=scan(string,i);
Pos=1;
len=0;
do while(1);
call scan(String,1,Pos,len);
if pos=0 then leave;
w=substr(String,Pos,len);
pos=pos+len;
The code is a bit more complicated, so it is only something you should use when performance really matters.
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