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modbuiltins: round(): Accept second arg, and at least support it to be 0. 

Per https://docs.python.org/3/library/functions.html#round, 2-args format
guaranteedly returns float.
This commit is contained in:
Paul Sokolovsky 2015-03-30 02:20:23 +03:00
parent e178ef2520
commit fdaac1dbf8
1 changed files with 14 additions and 3 deletions
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17
py/modbuiltins.c
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@ -465,12 +465,20 @@ STATIC mp_obj_t mp_builtin_repr(mp_obj_t o_in) {
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_repr_obj, mp_builtin_repr);
STATIC mp_obj_t mp_builtin_round(mp_obj_t o_in) {
// TODO support second arg
STATIC mp_obj_t mp_builtin_round(mp_uint_t n_args, const mp_obj_t *args) {
// TODO really support second arg
mp_obj_t o_in = args[0];
if (MP_OBJ_IS_INT(o_in)) {
return o_in;
}
#if MICROPY_PY_BUILTINS_FLOAT
mp_int_t num_dig = 0;
if (n_args > 1) {
num_dig = mp_obj_get_int(args[1]);
if (num_dig > 0) {
mp_not_implemented("round(..., N>0)");
}
}
mp_float_t val = mp_obj_get_float(o_in);
mp_float_t rounded = MICROPY_FLOAT_C_FUN(round)(val);
mp_int_t r = rounded;
@ -480,12 +488,15 @@ STATIC mp_obj_t mp_builtin_round(mp_obj_t o_in) {
} else if (val - rounded == -0.5) {
r &= ~1;
}
if (n_args > 1) {
return mp_obj_new_float(r);
}
#else
mp_int_t r = mp_obj_get_int(o_in);
#endif
return mp_obj_new_int(r);
}
MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_round_obj, mp_builtin_round);
MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_round_obj, 1, 2, mp_builtin_round);
STATIC mp_obj_t mp_builtin_sum(mp_uint_t n_args, const mp_obj_t *args) {
assert(1 <= n_args && n_args <= 2);