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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 "py/runtime.h"
#if MICROPY_PY_BUILTINS_FILTER
typedef struct _mp_obj_filter_t {
mp_obj_base_t base;
mp_obj_t fun;
mp_obj_t iter;
} mp_obj_filter_t;
STATIC mp_obj_t filter_make_new(const mp_obj_type_t *type, size_t n_args, size_t n_kw, const mp_obj_t *args) {
mp_arg_check_num(n_args, n_kw, 2, 2, false);
mp_obj_filter_t *o = mp_obj_malloc(mp_obj_filter_t, type);
o->fun = args[0];
o->iter = mp_getiter(args[1], NULL);
return MP_OBJ_FROM_PTR(o);
}
STATIC mp_obj_t filter_iternext(mp_obj_t self_in) {
mp_check_self(mp_obj_is_type(self_in, &mp_type_filter));
mp_obj_filter_t *self = MP_OBJ_TO_PTR(self_in);
mp_obj_t next;
while ((next = mp_iternext(self->iter)) != MP_OBJ_STOP_ITERATION) {
mp_obj_t val;
if (self->fun != mp_const_none) {
val = mp_call_function_n_kw(self->fun, 1, 0, &next);
} else {
val = next;
}
if (mp_obj_is_true(val)) {
return next;
}
}
return MP_OBJ_STOP_ITERATION;
}
const mp_obj_type_t mp_type_filter = {
{ &mp_type_type },
.name = MP_QSTR_filter,
.make_new = filter_make_new,
.getiter = mp_identity_getiter,
.iternext = filter_iternext,
};
#endif // MICROPY_PY_BUILTINS_FILTER
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