examples/lib/length.xyw
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; returns the length of a string (max: 255)
; a16 -> a8
.label length
POPxw ; store start address
$00 POPx ; counter
.label length.loop
; if at end of string, go to end
LDBxw $00 EQU length.end JCNw
; otherwise increment address and counter
INCxw
INCx
length.loop JMPw
.label length.end
PSHx RTS
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