circuitpython/examples/embedding/hello-embed.c

/*
 * This file is part of the Micro Python project, http://micropython.org/
 *
 * The MIT License (MIT)
 *
 * Copyright (c) 2016 Paul Sokolovsky
 *
 * 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 <string.h>
#include <stdio.h>
#include <stdlib.h>

#include "py/compile.h"
#include "py/runtime.h"
#include "py/gc.h"
#include "py/stackctrl.h"

static char heap[16384];

mp_obj_t execute_from_str(const char *str) {
    nlr_buf_t nlr;
    if (nlr_push(&nlr) == 0) {
        mp_lexer_t *lex = mp_lexer_new_from_str_len(0/*MP_QSTR_*/, str, strlen(str), false);
        mp_parse_tree_t pt = mp_parse(lex, MP_PARSE_FILE_INPUT);
        mp_obj_t module_fun = mp_compile(&pt, lex->source_name, MP_EMIT_OPT_NONE, false);
        mp_call_function_0(module_fun);
        nlr_pop();
        return 0;
    } else {
        // uncaught exception
        return (mp_obj_t)nlr.ret_val;
    }
}

int main() {
    // Initialized stack limit
    mp_stack_set_limit(40000 * (BYTES_PER_WORD / 4));
    // Initialize heap
    gc_init(heap, heap + sizeof(heap));
    // Initialize interpreter
    mp_init();

    const char str[] = "print('Hello world of easy embedding!')";
    if (execute_from_str(str)) {
        printf("Error\n");
    }
}

uint mp_import_stat(const char *path) {
    return MP_IMPORT_STAT_NO_EXIST;
}

void nlr_jump_fail(void *val) {
    printf("FATAL: uncaught NLR %p\n", val);
    exit(1);
}