micropython: add micropython component

components/language/micropython/tests/unix/ffi_float.py

@@ -0,0 +1,49 @@
+# 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))