73 lines
2.5 KiB
C
73 lines
2.5 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include "py/nlr.h"
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#include "py/runtime.h"
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typedef struct _mp_obj_filter_t {
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mp_obj_base_t base;
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mp_obj_t fun;
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mp_obj_t iter;
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} mp_obj_filter_t;
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STATIC mp_obj_t filter_make_new(mp_obj_t type_in, mp_uint_t n_args, mp_uint_t n_kw, const mp_obj_t *args) {
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if (n_args != 2 || n_kw != 0) {
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nlr_raise(mp_obj_new_exception_msg(&mp_type_TypeError, "filter expected 2 arguments"));
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}
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assert(n_args == 2);
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mp_obj_filter_t *o = m_new_obj(mp_obj_filter_t);
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o->base.type = &mp_type_filter;
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o->fun = args[0];
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o->iter = mp_getiter(args[1]);
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return o;
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}
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STATIC mp_obj_t filter_iternext(mp_obj_t self_in) {
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assert(MP_OBJ_IS_TYPE(self_in, &mp_type_filter));
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mp_obj_filter_t *self = self_in;
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mp_obj_t next;
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while ((next = mp_iternext(self->iter)) != MP_OBJ_STOP_ITERATION) {
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mp_obj_t val;
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if (self->fun != mp_const_none) {
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val = mp_call_function_n_kw(self->fun, 1, 0, &next);
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} else {
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val = next;
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}
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if (mp_obj_is_true(val)) {
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return next;
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}
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}
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return MP_OBJ_STOP_ITERATION;
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}
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const mp_obj_type_t mp_type_filter = {
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{ &mp_type_type },
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.name = MP_QSTR_filter,
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.make_new = filter_make_new,
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.getiter = mp_identity,
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.iternext = filter_iternext,
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};
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