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Diffstat (limited to 'py/objdeque.c')
| -rw-r--r-- | py/objdeque.c | 159 |
1 files changed, 159 insertions, 0 deletions
diff --git a/py/objdeque.c b/py/objdeque.c new file mode 100644 index 000000000..15936f9ab --- /dev/null +++ b/py/objdeque.c @@ -0,0 +1,159 @@ +/* + * This file is part of the MicroPython project, http://micropython.org/ + * + * The MIT License (MIT) + * + * Copyright (c) 2018 Paul Sokolovsky + * + * Permission is hereby granted, free of charge, to any person obtaining a copy + * of this software and associated documentation files (the "Software"), to deal + * in the Software without restriction, including without limitation the rights + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell + * copies of the Software, and to permit persons to whom the Software is + * furnished to do so, subject to the following conditions: + * + * The above copyright notice and this permission notice shall be included in + * all copies or substantial portions of the Software. + * + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN + * THE SOFTWARE. + */ + +#include <string.h> + +#include "py/mpconfig.h" +#if MICROPY_PY_COLLECTIONS_DEQUE + +#include "py/runtime.h" + +typedef struct _mp_obj_deque_t { + mp_obj_base_t base; + size_t alloc; + size_t i_get; + size_t i_put; + mp_obj_t *items; + uint32_t flags; + #define FLAG_CHECK_OVERFLOW 1 +} mp_obj_deque_t; + +STATIC mp_obj_t deque_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) { + mp_arg_check_num(n_args, n_kw, 2, 3, false); + + /* Initialization from existing sequence is not supported, so an empty + tuple must be passed as such. */ + if (args[0] != mp_const_empty_tuple) { + mp_raise_ValueError(NULL); + } + + mp_obj_deque_t *o = m_new_obj(mp_obj_deque_t); + o->base.type = type; + o->alloc = mp_obj_get_int(args[1]) + 1; + o->i_get = o->i_put = 0; + o->items = m_new(mp_obj_t, o->alloc); + mp_seq_clear(o->items, 0, o->alloc, sizeof(*o->items)); + + if (n_args > 2) { + o->flags = mp_obj_get_int(args[2]); + } + + return MP_OBJ_FROM_PTR(o); +} + +STATIC mp_obj_t deque_unary_op(mp_unary_op_t op, mp_obj_t self_in) { + mp_obj_deque_t *self = MP_OBJ_TO_PTR(self_in); + switch (op) { + case MP_UNARY_OP_BOOL: + return mp_obj_new_bool(self->i_get != self->i_put); + case MP_UNARY_OP_LEN: { + mp_int_t len = self->i_put - self->i_get; + if (len < 0) { + len += self->alloc; + } + return MP_OBJ_NEW_SMALL_INT(len); + } + #if MICROPY_PY_SYS_GETSIZEOF + case MP_UNARY_OP_SIZEOF: { + size_t sz = sizeof(*self) + sizeof(mp_obj_t) * self->alloc; + return MP_OBJ_NEW_SMALL_INT(sz); + } + #endif + default: + return MP_OBJ_NULL; // op not supported + } +} + +STATIC mp_obj_t mp_obj_deque_append(mp_obj_t self_in, mp_obj_t arg) { + mp_obj_deque_t *self = MP_OBJ_TO_PTR(self_in); + + size_t new_i_put = self->i_put + 1; + if (new_i_put == self->alloc) { + new_i_put = 0; + } + + if (self->flags & FLAG_CHECK_OVERFLOW && new_i_put == self->i_get) { + mp_raise_msg(&mp_type_IndexError, "full"); + } + + self->items[self->i_put] = arg; + self->i_put = new_i_put; + + if (self->i_get == new_i_put) { + if (++self->i_get == self->alloc) { + self->i_get = 0; + } + } + + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_2(deque_append_obj, mp_obj_deque_append); + +STATIC mp_obj_t deque_popleft(mp_obj_t self_in) { + mp_obj_deque_t *self = MP_OBJ_TO_PTR(self_in); + + if (self->i_get == self->i_put) { + mp_raise_msg(&mp_type_IndexError, "empty"); + } + + mp_obj_t ret = self->items[self->i_get]; + self->items[self->i_get] = MP_OBJ_NULL; + + if (++self->i_get == self->alloc) { + self->i_get = 0; + } + + return ret; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(deque_popleft_obj, deque_popleft); + +STATIC mp_obj_t deque_clear(mp_obj_t self_in) { + mp_obj_deque_t *self = MP_OBJ_TO_PTR(self_in); + self->i_get = self->i_put = 0; + mp_seq_clear(self->items, 0, self->alloc, sizeof(*self->items)); + return mp_const_none; +} +STATIC MP_DEFINE_CONST_FUN_OBJ_1(deque_clear_obj, deque_clear); + +STATIC const mp_rom_map_elem_t deque_locals_dict_table[] = { + { MP_ROM_QSTR(MP_QSTR_append), MP_ROM_PTR(&deque_append_obj) }, + #if 0 + { MP_ROM_QSTR(MP_QSTR_clear), MP_ROM_PTR(&deque_clear_obj) }, + #endif + { MP_ROM_QSTR(MP_QSTR_popleft), MP_ROM_PTR(&deque_popleft_obj) }, +}; + +STATIC MP_DEFINE_CONST_DICT(deque_locals_dict, deque_locals_dict_table); + +const mp_obj_type_t mp_type_deque = { + { &mp_type_type }, + .name = MP_QSTR_deque, + .make_new = deque_make_new, + .unary_op = deque_unary_op, + .locals_dict = (mp_obj_dict_t*)&deque_locals_dict, +}; + +#endif // MICROPY_PY_COLLECTIONS_DEQUE |