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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
*
* 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/obj.h"
#include "py/runtime.h"
typedef struct _mp_obj_closure_t {
mp_obj_base_t base;
mp_obj_t fun;
size_t n_closed;
mp_obj_t closed[];
} mp_obj_closure_t;
STATIC mp_obj_t closure_call(mp_obj_t self_in, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_obj_closure_t *self = MP_OBJ_TO_PTR(self_in);
// need to concatenate closed-over-vars and args
size_t n_total = self->n_closed + n_args + 2 * n_kw;
if (n_total <= 5) {
// use stack to allocate temporary args array
mp_obj_t args2[5];
memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
return mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
} else {
// use heap to allocate temporary args array
mp_obj_t *args2 = m_new(mp_obj_t, n_total);
memcpy(args2, self->closed, self->n_closed * sizeof(mp_obj_t));
memcpy(args2 + self->n_closed, args, (n_args + 2 * n_kw) * sizeof(mp_obj_t));
mp_obj_t res = mp_call_function_n_kw(self->fun, self->n_closed + n_args, n_kw, args2);
m_del(mp_obj_t, args2, n_total);
return res;
}
}
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
STATIC void closure_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
(void)kind;
mp_obj_closure_t *o = MP_OBJ_TO_PTR(o_in);
mp_print_str(print, "<closure ");
mp_obj_print_helper(print, o->fun, PRINT_REPR);
mp_printf(print, " at %p, n_closed=%u ", o, (int)o->n_closed);
for (size_t i = 0; i < o->n_closed; i++) {
if (o->closed[i] == MP_OBJ_NULL) {
mp_print_str(print, "(nil)");
} else {
mp_obj_print_helper(print, o->closed[i], PRINT_REPR);
}
mp_print_str(print, " ");
}
mp_print_str(print, ">");
}
#endif
const mp_obj_type_t closure_type = {
{ &mp_type_type },
.name = MP_QSTR_closure,
#if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
.print = closure_print,
#endif
.call = closure_call,
};
mp_obj_t mp_obj_new_closure(mp_obj_t fun, size_t n_closed_over, const mp_obj_t *closed) {
mp_obj_closure_t *o = m_new_obj_var(mp_obj_closure_t, mp_obj_t, n_closed_over);
o->base.type = &closure_type;
o->fun = fun;
o->n_closed = n_closed_over;
memcpy(o->closed, closed, n_closed_over * sizeof(mp_obj_t));
return MP_OBJ_FROM_PTR(o);
}
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