nativeglue.c

/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 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 <stdio.h>
#include <string.h>
#include <assert.h>

#include "py/nlr.h"
#include "py/runtime0.h"
#include "py/runtime.h"
#include "py/emitglue.h"

#if MICROPY_EMIT_NATIVE

#if 0 // print debugging info
#define DEBUG_printf DEBUG_printf
#else // don't print debugging info
#define DEBUG_printf(...) (void)0
#endif

// convert a Micro Python object to a valid native value based on type
mp_uint_t mp_convert_obj_to_native(mp_obj_t obj, mp_uint_t type) {
    DEBUG_printf("mp_convert_obj_to_native(%p, " UINT_FMT ")\n", obj, type);
    switch (type & 3) {
        case MP_NATIVE_TYPE_OBJ: return (mp_uint_t)obj;
        case MP_NATIVE_TYPE_BOOL:
        case MP_NATIVE_TYPE_INT: return mp_obj_get_int(obj);
        case MP_NATIVE_TYPE_UINT: {
            mp_buffer_info_t bufinfo;
            if (mp_get_buffer(obj, &bufinfo, MP_BUFFER_RW)) {
                return (mp_uint_t)bufinfo.buf;
            } else {
                // TODO should be mp_obj_get_uint_truncated or something
                return mp_obj_get_int(obj);
            }
        }
        default: assert(0); return 0;
    }
}

// convert a native value to a Micro Python object based on type
mp_obj_t mp_convert_native_to_obj(mp_uint_t val, mp_uint_t type) {
    DEBUG_printf("mp_convert_native_to_obj(" UINT_FMT ", " UINT_FMT ")\n", val, type);
    switch (type & 3) {
        case MP_NATIVE_TYPE_OBJ: return (mp_obj_t)val;
        case MP_NATIVE_TYPE_BOOL: return MP_BOOL(val);
        case MP_NATIVE_TYPE_INT: return mp_obj_new_int(val);