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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))
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