56 lines
1.4 KiB
C
56 lines
1.4 KiB
C
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#include <stdlib.h>
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#include <assert.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_map_t {
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mp_obj_base_t base;
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machine_uint_t n_iters;
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mp_obj_t fun;
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mp_obj_t iters[];
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} mp_obj_map_t;
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static mp_obj_t map_make_new(mp_obj_t type_in, int n_args, const mp_obj_t *args) {
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/* NOTE: args are backwards */
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mp_obj_map_t *o = m_new_obj_var(mp_obj_map_t, mp_obj_t, n_args - 1);
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assert(n_args >= 2);
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o->base.type = &map_type;
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o->n_iters = n_args - 1;
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o->fun = args[n_args - 1];
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for (int i = 0; i < n_args - 1; i++) {
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o->iters[i] = rt_getiter(args[n_args-i-2]);
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}
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return o;
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}
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static mp_obj_t map_getiter(mp_obj_t self_in) {
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return self_in;
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}
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static mp_obj_t map_iternext(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &map_type));
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mp_obj_map_t *self = self_in;
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mp_obj_t *nextses = m_new(mp_obj_t, self->n_iters);
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for (int i = 0; i < self->n_iters; i++) {
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mp_obj_t next = rt_iternext(self->iters[i]);
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if (next == mp_const_stop_iteration) {
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m_del(mp_obj_t, nextses, self->n_iters);
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return mp_const_stop_iteration;
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}
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nextses[i] = next;
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}
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return rt_call_function_n(self->fun, self->n_iters, nextses);
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}
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const mp_obj_type_t map_type = {
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{ &mp_const_type },
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"map",
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.make_new = map_make_new,
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.getiter = map_getiter,
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.iternext = map_iternext,
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};
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