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py: More robust int conversion and overflow checking.

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This commit is contained in:
Damien George
2014-04-03 11:00:54 +00:00
parent a58a7aefbd
commit 8270e3853d
6 changed files with 63 additions and 9 deletions
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18
py/obj.c
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@@ -203,6 +203,24 @@ machine_int_t mp_obj_get_int(mp_obj_t arg) {
}
}
// returns false if arg is not of integral type
// returns true and sets *value if it is of integral type
// can throw OverflowError if arg is of integral type, but doesn't fit in a machine_int_t
bool mp_obj_get_int_maybe(mp_obj_t arg, machine_int_t *value) {
if (arg == mp_const_false) {
*value = 0;
} else if (arg == mp_const_true) {
*value = 1;
} else if (MP_OBJ_IS_SMALL_INT(arg)) {
*value = MP_OBJ_SMALL_INT_VALUE(arg);
} else if (MP_OBJ_IS_TYPE(arg, &mp_type_int)) {
*value = mp_obj_int_get_checked(arg);
} else {
return false;
}
return true;
}
#if MICROPY_ENABLE_FLOAT
mp_float_t mp_obj_get_float(mp_obj_t arg) {
if (arg == mp_const_false) {