list: Implement list multiplication.
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bab5cfb34f
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074d3b5f86
15
py/objlist.c
15
py/objlist.c
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@ -81,6 +81,21 @@ static mp_obj_t list_binary_op(int op, mp_obj_t lhs, mp_obj_t rhs) {
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memcpy(s->items + o->len, p->items, sizeof(mp_obj_t) * p->len);
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return s;
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}
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case RT_BINARY_OP_MULTIPLY:
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{
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if (!MP_OBJ_IS_SMALL_INT(rhs)) {
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return NULL;
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}
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int n = MP_OBJ_SMALL_INT_VALUE(rhs);
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int len = o->len;
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mp_obj_list_t *s = list_new(len * n);
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mp_obj_t *dest = s->items;
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for (int i = 0; i < n; i++) {
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memcpy(dest, o->items, sizeof(mp_obj_t) * len);
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dest += len;
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}
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return s;
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}
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default:
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// op not supported
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return NULL;
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@ -0,0 +1,4 @@
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print([0] * 5)
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a = [1, 2, 3]
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c = a * 3
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print(c)
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