40 lines
764 B
Python
40 lines
764 B
Python
# test passing addresses to viper
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@micropython.viper
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def get_addr(x:ptr) -> ptr:
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return x
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@micropython.viper
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def memset(dest:ptr8, c:int, n:int):
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for i in range(n):
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dest[i] = c
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@micropython.viper
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def memsum(src:ptr8, n:int) -> int:
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s = 0
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for i in range(n):
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s += src[i]
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return s
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# create array and get its address
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ar = bytearray('0000')
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addr = get_addr(ar)
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print(type(ar))
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print(type(addr))
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print(ar)
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# pass array as an object
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memset(ar, ord('1'), len(ar))
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print(ar)
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# pass direct pointer to array buffer
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memset(addr, ord('2'), len(ar))
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print(ar)
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# pass direct pointer to array buffer, with offset
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memset(addr + 2, ord('3'), len(ar) - 2)
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print(ar)
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# pass a read-only bytes object in
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print(memsum(b'\x01\x02\x03\x04', 4))
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