Enhancement in lap handler

wtfstopw.asm

@@ -389,40 +389,29 @@ proc_lap_handler:
 	syscall
 
 	; increment the lapcount str directly
-	mov rbx, lapcount ; first digit ptr
-	add rbx, lapcountlen ; rightmost digit ptr
-	sub rbx, 1
-	mov r8, 1 ; counter
-	lap_handler_inc_lap:
-		mov r10b, [rbx]
-		cmp r10b, 0x39 ; '9'
-		jl lap_handler_inc_end
-
-		add r8, 1
-		cmp r8, [laplen]
-		jl lap_handler_laplen_noupd
-		mov [laplen], r8 ; update laplen
-
-		lap_handler_laplen_noupd:
-		mov byte [rbx], 0x30 ; set current digit to '0'
-		sub rbx, 1
-		cmp rbx, lapcount
-		jl fault
-		jmp lap_handler_inc_lap
-	lap_handler_inc_end:
-		add r10b, 1
-		mov [rbx], r10b
+	mov rcx, lapcountlen - 1; digit counter starting by the right most
+	proclap_loop:
+		cmp byte [lapcount + rcx], '9'
+		jl proclap_loopend
+		mov byte [lapcount + rcx], '0' ; set current digit to '0'
+		loop proclap_loop
+	proclap_loopend:
+	add byte [lapcount + rcx], 1 ; increment current digit
+
+	mov rdx, lapcountlen
+	sub rdx, rcx
+	cmp rdx, [laplen] ; update laplen if needed
+	cmovl rdx, [laplen]
+	mov [laplen], rdx
+	mov rsi, lapcount + lapcountlen
+	sub rsi, rdx
 	
 	mov rax, 1
 	mov rdi, 1 ; stdout
-	mov rdx, [laplen]
-	mov rsi, lapcount
-	add rsi, lapcountlen
-	sub rsi, rdx ; leftmost digit ptr
 	syscall
 
 	mov rax, 1 ; write
-	mov rsi, lapsmsg + 4
+	mov rsi, lapsmsg + 3
 	mov rdx, 3 ; " : "
 	syscall
 
@@ -555,9 +544,9 @@ usage:
 proc_strlen:
 	mov r8, rax
 	mov r9, r8
-	sub r9, 1
+	dec r9
 	strlen_loop:
-		add r9, 1
+		inc r9
 		mov al, [r9]
 		cmp al, 0
 		jne strlen_loop