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27 lines
942 B
Python
27 lines
942 B
Python
from ctypes import *
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import math, os
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## Load the V shared library:
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so_file="./test.so"
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if os.name=="nt":
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so_file="./test.dll"
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lib = CDLL(so_file)
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## Pass an integer to a V function, and receiving back an integer:
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print("lib.square(10) result is", lib.square(10))
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assert lib.square(10) == 100, "Cannot validate V square()."
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## Pass a floating point number to a V function:
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lib.sqrt_of_sum_of_squares.restype = c_double
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assert lib.sqrt_of_sum_of_squares(c_double(1.1), c_double(2.2)) == math.sqrt(1.1*1.1 + 2.2*2.2), "Cannot validate V sqrt_of_sum_of_squares()."
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## Passing a V string to a V function, and receiving back a V string:
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class VString(Structure):
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_fields_ = [("str", c_char_p), ("len", c_int)]
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lib.process_v_string.argtypes = [VString]
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lib.process_v_string.restype = VString
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assert lib.process_v_string(VString(b'World', 5)).str == b'v World v'
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print('Hello', str(lib.process_v_string(VString(b'World', 5)).str, 'utf-8'))
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