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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(const 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 = 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);

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(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();

} 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] != MP_OBJ_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_TO_PTR(mp_obj_new_tuple(num_fields, arg_objects));

tuple->base.type = type_in;

return MP_OBJ_FROM_PTR(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_tuple_t*)(mp_rom_obj_tuple_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 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);

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