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py: Add iter_buf to getiter type method.

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Allows to iterate over the following without allocating on the heap:
- tuple
- list
- string, bytes
- bytearray, array
- dict (not dict.keys, dict.values, dict.items)
- set, frozenset

Allows to call the following without heap memory:
- all, any, min, max, sum

TODO: still need to allocate stack memory in bytecode for iter_buf.
This commit is contained in:
Damien George
2016-01-09 23:14:54 +00:00
parent 101886f529
commit ae8d867586
36 changed files with 162 additions and 106 deletions
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7
py/objstrunicode.c
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@@ -36,7 +36,7 @@
#if MICROPY_PY_BUILTINS_STR_UNICODE
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str);
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf);
/******************************************************************************/
/* str */
@@ -301,8 +301,9 @@ STATIC mp_obj_t str_it_iternext(mp_obj_t self_in) {
}
}
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str) {
mp_obj_str_it_t *o = m_new_obj(mp_obj_str_it_t);
STATIC mp_obj_t mp_obj_new_str_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf) {
assert(sizeof(mp_obj_str_it_t) <= sizeof(mp_obj_iter_buf_t));
mp_obj_str_it_t *o = (mp_obj_str_it_t*)iter_buf;
o->base.type = &mp_type_polymorph_iter;
o->iternext = str_it_iternext;
o->str = str;