micropython: add micropython component

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

@@ -0,0 +1,36 @@
+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"))
+
+qsort = libc.func("v", "qsort", "piip")
+
+
+def cmp(pa, pb):
+    a = ffi.as_bytearray(pa, 1)
+    b = ffi.as_bytearray(pb, 1)
+    # print("cmp:", a, b)
+    return a[0] - b[0]
+
+
+cmp_c = ffi.callback("i", cmp, "pp")
+
+s = bytearray(b"foobar")
+print("org string:", s)
+qsort(s, len(s), 1, cmp_c)
+print("qsort'ed:", s)