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# test ffi float support

try:

import ffi

except ImportError:

print("SKIP")

raise SystemExit

def ffi_open(names):

err = None

for n in names:

try:

mod = ffi.open(n)

return mod

except OSError as e:

err = e

raise err

libc = ffi_open(("libc.so", "libc.so.0", "libc.so.6", "libc.dylib"))

try:

strtof = libc.func("f", "strtof", "sp")

except OSError:

# Some libc's (e.g. Android's Bionic) define strtof as macro/inline func

# in terms of strtod().

print("SKIP")

raise SystemExit

print("%.6f" % strtof("1.23", None))

strtod = libc.func("d", "strtod", "sp")

print("%.6f" % strtod("1.23", None))

# test passing double and float args

libm = ffi_open(("libm.so", "libm.so.6", "libc.so.0", "libc.so.6", "libc.dylib"))

tgamma = libm.func("d", "tgamma", "d")

for fun_name in ("tgamma",):

fun = globals()[fun_name]

for val in (0.5, 1, 1.0, 1.5, 4, 4.0):

print(fun_name, "%.5f" % fun(val))

# test passing 2x float/double args

powf = libm.func("f", "powf", "ff")

pow = libm.func("d", "pow", "dd")

for fun_name in ("powf", "pow"):

fun = globals()[fun_name]

for args in ((0, 1), (1, 0), (2, 0.5), (3, 4)):

print(fun_name, "%.5f" % fun(*args))