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/*
* This file is part of the Micro Python 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/nlr.h"
#include "py/objtuple.h"
#include "py/runtime.h"
#include "py/objstr.h"
#if MICROPY_PY_COLLECTIONS
typedef struct _mp_obj_namedtuple_type_t {
mp_obj_type_t base;
mp_uint_t n_fields;
qstr fields[];
} mp_obj_namedtuple_type_t;
typedef struct _mp_obj_namedtuple_t {
mp_obj_tuple_t tuple;
} mp_obj_namedtuple_t;
STATIC mp_uint_t namedtuple_find_field(mp_obj_namedtuple_type_t *type, qstr name) {
for (mp_uint_t i = 0; i < type->n_fields; i++) {
if (type->fields[i] == name) {
return i;
}
}
return -1;
}
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 = 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 = self_in;
int id = namedtuple_find_field((mp_obj_namedtuple_type_t*)self->tuple.base.type, attr);
if (id == -1) {
return;
}
dest[0] = self->tuple.items[id];
} else {
// delete/store attribute
// provide more detailed error message than we'd get by just returning
nlr_raise(mp_obj_new_exception_msg(&mp_type_AttributeError, "can't set attribute"));
}
}
STATIC mp_obj_t namedtuple_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
mp_obj_namedtuple_type_t *type = type_in;
mp_uint_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();
} else if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_NORMAL) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"function takes %d positional arguments but %d were given",
num_fields, n_args + n_kw));
} else if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED) {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"%q() takes %d positional arguments but %d were given",
type->base.name, num_fields, n_args + n_kw));
}
}
mp_obj_t *arg_objects;
if (n_args == num_fields) {
arg_objects = (mp_obj_t*)args;
} else {
size_t alloc_size = sizeof(mp_obj_t) * num_fields;
arg_objects = alloca(alloc_size);
memset(arg_objects, 0, alloc_size);
for (mp_uint_t i = 0; i < n_args; i++) {
arg_objects[i] = args[i];
}
for (mp_uint_t i = n_args; i < n_args + 2 * n_kw; i += 2) {
qstr kw = mp_obj_str_get_qstr(args[i]);
int id = namedtuple_find_field(type, kw);
if (id == -1) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
mp_arg_error_terse_mismatch();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"unexpected keyword argument '%q'", kw));
}
}
if (arg_objects[id] != NULL) {
if (MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_TERSE) {
mp_arg_error_terse_mismatch();
} else {
nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_TypeError,
"function got multiple values for argument '%q'", kw));
}
}
arg_objects[id] = args[i + 1];
}
}
mp_obj_tuple_t *tuple = mp_obj_new_tuple(num_fields, arg_objects);
tuple->base.type = type_in;
return tuple;
}
STATIC const mp_rom_obj_tuple_t namedtuple_base_tuple = {{&mp_type_tuple}, 1, {MP_ROM_PTR(&mp_type_tuple)}};
STATIC mp_obj_t mp_obj_new_namedtuple_type(qstr name, mp_uint_t n_fields, mp_obj_t *fields) {
mp_obj_namedtuple_type_t *o = m_new_obj_var(mp_obj_namedtuple_type_t, qstr, n_fields);
memset(&o->base, 0, sizeof(o->base));
o->base.base.type = &mp_type_type;
o->base.name = name;
o->base.print = namedtuple_print;
o->base.make_new = namedtuple_make_new;
o->base.unary_op = mp_obj_tuple_unary_op;
o->base.binary_op = mp_obj_tuple_binary_op;
o->base.attr = namedtuple_attr;
o->base.subscr = mp_obj_tuple_subscr;
o->base.getiter = mp_obj_tuple_getiter;
o->base.bases_tuple = (mp_obj_t)&namedtuple_base_tuple;
o->n_fields = n_fields;
for (mp_uint_t i = 0; i < n_fields; i++) {
o->fields[i] = mp_obj_str_get_qstr(fields[i]);
}
return 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);
mp_uint_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
if (!MP_OBJ_IS_TYPE(fields_in, &mp_type_list)) {
nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "list required"));
}
mp_obj_list_get(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
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