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# test loading from ptr8 type

@micropython.viper

def get(src:ptr8) -> int:

return src[0]

@micropython.viper

def get1(src:ptr8) -> int:

return src[1]

@micropython.viper

def memadd(src:ptr8, n:int) -> int:

sum = 0

for i in range(n):

sum += src[i]

return sum

@micropython.viper

def memadd2(src_in) -> int:

src = ptr8(src_in)

n = int(len(src_in))

sum = 0

for i in range(n):

sum += src[i]

return sum

b = bytearray(b'1234')

print(b)

print(get(b), get1(b))

print(memadd(b, 4))

print(memadd2(b))