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objcell.c

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    Damien George authored
    This allows the mp_obj_t type to be configured to something other than a
    pointer-sized primitive type.
    
    This patch also includes additional changes to allow the code to compile
    when sizeof(mp_uint_t) != sizeof(void*), such as using size_t instead of
    mp_uint_t, and various casts.
    999cedb9
    History
    objcell.c 2.39 KiB
    /*
     * This file is part of the Micro Python 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/obj.h"
    
    typedef struct _mp_obj_cell_t {
        mp_obj_base_t base;
        mp_obj_t obj;
    } mp_obj_cell_t;
    
    mp_obj_t mp_obj_cell_get(mp_obj_t self_in) {
        mp_obj_cell_t *self = MP_OBJ_TO_PTR(self_in);
        return self->obj;
    }
    
    void mp_obj_cell_set(mp_obj_t self_in, mp_obj_t obj) {
        mp_obj_cell_t *self = MP_OBJ_TO_PTR(self_in);
        self->obj = obj;
    }
    
    #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
    STATIC void cell_print(const mp_print_t *print, mp_obj_t o_in, mp_print_kind_t kind) {
        (void)kind;
        mp_obj_cell_t *o = MP_OBJ_TO_PTR(o_in);
        mp_printf(print, "<cell %p ", o->obj);
        if (o->obj == MP_OBJ_NULL) {
            mp_print_str(print, "(nil)");
        } else {
            mp_obj_print_helper(print, o->obj, PRINT_REPR);
        }
        mp_print_str(print, ">");
    }
    #endif
    
    STATIC const mp_obj_type_t mp_type_cell = {
        { &mp_type_type },
        .name = MP_QSTR_, // cell representation is just value in < >
    #if MICROPY_ERROR_REPORTING == MICROPY_ERROR_REPORTING_DETAILED
        .print = cell_print,
    #endif
    };
    
    mp_obj_t mp_obj_new_cell(mp_obj_t obj) {
        mp_obj_cell_t *o = m_new_obj(mp_obj_cell_t);
        o->base.type = &mp_type_cell;
        o->obj = obj;
        return MP_OBJ_FROM_PTR(o);