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moductypes: When dereferencing a field which is array of uint8, use bytearray. 

Because bytearrays are much friendlier to work with, e.g. they can be printed
easily.
This commit is contained in:
Paul Sokolovsky 2014-10-30 03:32:54 +02:00
parent 2559e13957
commit 6d287a6a02
1 changed files with 13 additions and 2 deletions
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15
extmod/moductypes.c
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@ -101,11 +101,15 @@ enum {
// Here we need to set sign bit right
#define TYPE2SMALLINT(x, nbits) ((((int)x) << (32 - nbits)) >> 1)
#define GET_TYPE(x, nbits) (((x) >> (31 - nbits)) & ((1 << nbits) - 1));
#define GET_TYPE(x, nbits) (((x) >> (31 - nbits)) & ((1 << nbits) - 1))
// Bit 0 is "is_signed"
#define GET_SCALAR_SIZE(val_type) (1 << ((val_type) >> 1))
#define VALUE_MASK(type_nbits) ~((int)0x80000000 >> type_nbits)
#define IS_SCALAR_ARRAY(tuple_desc) ((tuple_desc)->len == 2)
// We cannot apply the below to INT8, as their range [-128, 127]
#define IS_SCALAR_ARRAY_OF_BYTES(tuple_desc) (GET_TYPE(MP_OBJ_SMALL_INT_VALUE((tuple_desc)->items[1]), VAL_TYPE_BITS) == UINT8)
// "struct" in uctypes context means "structural", i.e. aggregate, type.
STATIC const mp_obj_type_t uctypes_struct_type;
@ -454,7 +458,14 @@ STATIC mp_obj_t uctypes_struct_attr_op(mp_obj_t self_in, qstr attr, mp_obj_t set
o->flags = self->flags;
return o;
}
case PTR: case ARRAY: {
case ARRAY: {
mp_uint_t dummy;
if (IS_SCALAR_ARRAY(sub) && IS_SCALAR_ARRAY_OF_BYTES(sub)) {
return mp_obj_new_bytearray_by_ref(uctypes_struct_agg_size(sub, &dummy), self->addr + offset);
}
// Fall thru to return uctypes struct object
}
case PTR: {
mp_obj_uctypes_struct_t *o = m_new_obj(mp_obj_uctypes_struct_t);
o->base.type = &uctypes_struct_type;
o->desc = sub;