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micropython/py/objnamedtuple.c
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/* | |
* This file is part of the MicroPython project, http://micropython.org/ | |
* | |
* The MIT License (MIT) | |
* | |
* Copyright (c) 2013, 2014 Damien P. George | |
* Copyright (c) 2014 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/objtuple.h" | |
#include "py/runtime.h" | |
#include "py/objstr.h" | |
#include "py/objnamedtuple.h" | |
#if MICROPY_PY_COLLECTIONS | |
size_t mp_obj_namedtuple_find_field(const mp_obj_namedtuple_type_t *type, qstr name) { | |
for (size_t i = 0; i < type->n_fields; i++) { | |
if (type->fields[i] == name) { | |
return i; | |
} | |
} | |
return (size_t)-1; | |
} | |
#if MICROPY_PY_COLLECTIONS_NAMEDTUPLE__ASDICT | |
static mp_obj_t namedtuple_asdict(mp_obj_t self_in) { | |
mp_obj_namedtuple_t *self = MP_OBJ_TO_PTR(self_in); | |
const qstr *fields = ((mp_obj_namedtuple_type_t *)self->tuple.base.type)->fields; | |
mp_obj_t dict = mp_obj_new_dict(self->tuple.len); | |
// make it an OrderedDict | |
mp_obj_dict_t *dictObj = MP_OBJ_TO_PTR(dict); | |
dictObj->base.type = &mp_type_ordereddict; | |
dictObj->map.is_ordered = 1; | |
for (size_t i = 0; i < self->tuple.len; ++i) { | |
mp_obj_dict_store(dict, MP_OBJ_NEW_QSTR(fields[i]), self->tuple.items[i]); | |
} | |
return dict; | |
} | |
MP_DEFINE_CONST_FUN_OBJ_1(namedtuple_asdict_obj, namedtuple_asdict); | |
#endif | |
static void namedtuple_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) { | |
(void)kind; | |
mp_obj_namedtuple_t *o = MP_OBJ_TO_PTR(o_in); | |
mp_printf(print, "%q", o->tuple.base.type->name); | |
const qstr *fields = ((mp_obj_namedtuple_type_t *)o->tuple.base.type)->fields; | |
mp_obj_attrtuple_print_helper(print, fields, &o->tuple); | |
} | |
static void namedtuple_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) { | |
if (dest[0] == MP_OBJ_NULL) { | |
// load attribute | |
mp_obj_namedtuple_t *self = MP_OBJ_TO_PTR(self_in); | |
#if MICROPY_PY_COLLECTIONS_NAMEDTUPLE__ASDICT | |
if (attr == MP_QSTR__asdict) { | |
dest[0] = MP_OBJ_FROM_PTR(&namedtuple_asdict_obj); | |
dest[1] = self_in; | |
return; | |
} | |
#endif | |
size_t id = mp_obj_namedtuple_find_field((mp_obj_namedtuple_type_t *)self->tuple.base.type, attr); | |
if (id == (size_t)-1) { | |
return; | |
} | |
dest[0] = self->tuple.items[id]; | |
} else { | |
// delete/store attribute | |
// provide more detailed error message than we'd get by just returning | |
mp_raise_msg(&mp_type_AttributeError, MP_ERROR_TEXT("can't set attribute")); | |
} | |
} | |
static mp_obj_t namedtuple_make_new(const mp_obj_type_t *type_in, size_t n_args, size_t n_kw, const mp_obj_t *args) { | |
const mp_obj_namedtuple_type_t *type = (const mp_obj_namedtuple_type_t *)type_in; | |
size_t num_fields = type->n_fields; | |
if (n_args + n_kw != num_fields) { | |
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE | |
mp_arg_error_terse_mismatch(); | |
#elif MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NORMAL | |
mp_raise_msg_varg(&mp_type_TypeError, | |
MP_ERROR_TEXT("function takes %d positional arguments but %d were given"), | |
num_fields, n_args + n_kw); | |
#elif MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED | |
mp_raise_msg_varg(&mp_type_TypeError, | |
MP_ERROR_TEXT("%q() takes %d positional arguments but %d were given"), | |
((mp_obj_type_t *)&type->base)->name, num_fields, n_args + n_kw); | |
#endif | |
} | |
// Create a namedtuple with explicit malloc. Calling mp_obj_new_tuple | |
// with num_fields=0 returns a read-only object. | |
mp_obj_tuple_t *tuple = mp_obj_malloc_var(mp_obj_tuple_t, items, mp_obj_t, num_fields, type_in); | |
tuple->len = num_fields; | |
// Copy the positional args into the first slots of the namedtuple | |
memcpy(&tuple->items[0], args, sizeof(mp_obj_t) * n_args); | |
// Fill in the remaining slots with the keyword args | |
memset(&tuple->items[n_args], 0, sizeof(mp_obj_t) * n_kw); | |
for (size_t i = n_args; i < n_args + 2 * n_kw; i += 2) { | |
qstr kw = mp_obj_str_get_qstr(args[i]); | |
size_t id = mp_obj_namedtuple_find_field(type, kw); | |
if (id == (size_t)-1) { | |
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE | |
mp_arg_error_terse_mismatch(); | |
#else | |
mp_raise_msg_varg(&mp_type_TypeError, MP_ERROR_TEXT("unexpected keyword argument '%q'"), kw); | |
#endif | |
} | |
if (tuple->items[id] != MP_OBJ_NULL) { | |
#if MICROPY_ERROR_REPORTING <= MICROPY_ERROR_REPORTING_TERSE | |
mp_arg_error_terse_mismatch(); | |
#else | |
mp_raise_msg_varg(&mp_type_TypeError, | |
MP_ERROR_TEXT("function got multiple values for argument '%q'"), kw); | |
#endif | |
} | |
tuple->items[id] = args[i + 1]; | |
} | |
return MP_OBJ_FROM_PTR(tuple); | |
} | |
mp_obj_namedtuple_type_t *mp_obj_new_namedtuple_base(size_t n_fields, mp_obj_t *fields) { | |
mp_obj_namedtuple_type_t *o = m_new_obj_var0(mp_obj_namedtuple_type_t, fields, qstr, n_fields); | |
o->n_fields = n_fields; | |
for (size_t i = 0; i < n_fields; i++) { | |
o->fields[i] = mp_obj_str_get_qstr(fields[i]); | |
} | |
return o; | |
} | |
static mp_obj_t mp_obj_new_namedtuple_type(qstr name, size_t n_fields, mp_obj_t *fields) { | |
mp_obj_namedtuple_type_t *o = mp_obj_new_namedtuple_base(n_fields, fields); | |
mp_obj_type_t *type = (mp_obj_type_t *)&o->base; | |
type->base.type = &mp_type_type; | |
type->flags = MP_TYPE_FLAG_EQ_CHECKS_OTHER_TYPE; // can match tuple | |
type->name = name; | |
MP_OBJ_TYPE_SET_SLOT(type, make_new, namedtuple_make_new, 0); | |
MP_OBJ_TYPE_SET_SLOT(type, print, namedtuple_print, 1); | |
MP_OBJ_TYPE_SET_SLOT(type, unary_op, mp_obj_tuple_unary_op, 2); | |
MP_OBJ_TYPE_SET_SLOT(type, binary_op, mp_obj_tuple_binary_op, 3); | |
MP_OBJ_TYPE_SET_SLOT(type, attr, namedtuple_attr, 4); | |
MP_OBJ_TYPE_SET_SLOT(type, subscr, mp_obj_tuple_subscr, 5); | |
MP_OBJ_TYPE_SET_SLOT(type, iter, mp_obj_tuple_getiter, 6); | |
MP_OBJ_TYPE_SET_SLOT(type, parent, &mp_type_tuple, 7); | |
return MP_OBJ_FROM_PTR(o); | |
} | |
static mp_obj_t new_namedtuple_type(mp_obj_t name_in, mp_obj_t fields_in) { | |
qstr name = mp_obj_str_get_qstr(name_in); | |
size_t n_fields; | |
mp_obj_t *fields; | |
#if MICROPY_CPYTHON_COMPAT | |
if (mp_obj_is_str(fields_in)) { | |
fields_in = mp_obj_str_split(1, &fields_in); | |
} | |
#endif | |
mp_obj_get_array(fields_in, &n_fields, &fields); | |
return mp_obj_new_namedtuple_type(name, n_fields, fields); | |
} | |
MP_DEFINE_CONST_FUN_OBJ_2(mp_namedtuple_obj, new_namedtuple_type); | |
#endif // MICROPY_PY_COLLECTIONS |