54 lines
1.5 KiB
C
54 lines
1.5 KiB
C
#include <stdlib.h>
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#include <stdint.h>
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#include <string.h>
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#include <assert.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "obj.h"
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#include "runtime.h"
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typedef struct _mp_obj_closure_t {
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mp_obj_base_t base;
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mp_obj_t fun;
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uint n_closed;
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mp_obj_t *closed;
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} mp_obj_closure_t;
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// args are in reverse order in the array
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mp_obj_t closure_call_n(mp_obj_t self_in, int n_args, const mp_obj_t *args) {
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mp_obj_closure_t *self = self_in;
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// concatenate args and closed-over-vars, in reverse order
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// TODO perhaps cache this array so we don't need to create it each time we are called
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mp_obj_t *args2 = m_new(mp_obj_t, self->n_closed + n_args);
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memcpy(args2, args, n_args * sizeof(mp_obj_t));
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for (int i = 0; i < self->n_closed; i++) {
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args2[n_args + i] = self->closed[self->n_closed - 1 - i];
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}
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// call the function with the new vars array
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return rt_call_function_n(self->fun, n_args + self->n_closed, args2);
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}
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const mp_obj_type_t closure_type = {
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{ &mp_const_type },
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"closure",
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NULL, // print
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closure_call_n, // call_n
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NULL, // unary_op
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NULL, // binary_op
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NULL, // getiter
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NULL, // iternext
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{{NULL, NULL},}, // method list
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};
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mp_obj_t mp_obj_new_closure(mp_obj_t fun, mp_obj_t closure_tuple) {
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mp_obj_closure_t *o = m_new_obj(mp_obj_closure_t);
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o->base.type = &closure_type;
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o->fun = fun;
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mp_obj_tuple_get(closure_tuple, &o->n_closed, &o->closed);
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return o;
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}
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