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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
Download Patch File Download Diff File Expand all files Collapse all files

17
py/objstr.c
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@@ -38,7 +38,7 @@
STATIC mp_obj_t str_modulo_format(mp_obj_t pattern, size_t n_args, const mp_obj_t *args, mp_obj_t dict);
STATIC mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str);
STATIC mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf);
STATIC NORETURN void bad_implicit_conversion(mp_obj_t self_in);
/******************************************************************************/
@@ -231,7 +231,8 @@ STATIC mp_obj_t bytes_make_new(const mp_obj_type_t *type_in, size_t n_args, size
vstr_init(&vstr, len);
}
mp_obj_t iterable = mp_getiter(args[0]);
mp_obj_iter_buf_t iter_buf;
mp_obj_t iterable = mp_getiter(args[0], &iter_buf);
mp_obj_t item;
while ((item = mp_iternext(iterable)) != MP_OBJ_STOP_ITERATION) {
mp_int_t val = mp_obj_get_int(item);
@@ -1942,7 +1943,7 @@ STATIC const mp_rom_map_elem_t str8_locals_dict_table[] = {
STATIC MP_DEFINE_CONST_DICT(str8_locals_dict, str8_locals_dict_table);
#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);
const mp_obj_type_t mp_type_str = {
{ &mp_type_type },
@@ -2142,8 +2143,9 @@ 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_str8_it_t *o = m_new_obj(mp_obj_str8_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_str8_it_t) <= sizeof(mp_obj_iter_buf_t));
mp_obj_str8_it_t *o = (mp_obj_str8_it_t*)iter_buf;
o->base.type = &mp_type_polymorph_iter;
o->iternext = str_it_iternext;
o->str = str;
@@ -2164,8 +2166,9 @@ STATIC mp_obj_t bytes_it_iternext(mp_obj_t self_in) {
}
}
mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str) {
mp_obj_str8_it_t *o = m_new_obj(mp_obj_str8_it_t);
mp_obj_t mp_obj_new_bytes_iterator(mp_obj_t str, mp_obj_iter_buf_t *iter_buf) {
assert(sizeof(mp_obj_str8_it_t) <= sizeof(mp_obj_iter_buf_t));
mp_obj_str8_it_t *o = (mp_obj_str8_it_t*)iter_buf;
o->base.type = &mp_type_polymorph_iter;
o->iternext = bytes_it_iternext;
o->str = str;