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https://github.com/licsber/micropython.git
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Foreign Function Interface module allows to load native dynamic libraries, call functions and access variables in them. This makes possible to write interface modules in pure Python. This module provides thin wrapper around libffi. ctypes compatibility might be possible to implement on top of this module (though ctypes allow to call functions without prototypes, which is not supported by libffi (i.e. implementation would be inefficient))).
287 lines
7.1 KiB
C
287 lines
7.1 KiB
C
#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include <stdlib.h>
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#include "nlr.h"
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "lexer.h"
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#include "lexerunix.h"
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#include "parse.h"
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#include "obj.h"
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#include "compile.h"
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#include "runtime0.h"
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#include "runtime.h"
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#include "repl.h"
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#if MICROPY_USE_READLINE
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#include <readline/readline.h>
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#include <readline/history.h>
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#endif
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extern const mp_obj_fun_native_t mp_builtin_open_obj;
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void file_init();
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void rawsocket_init();
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void ffi_init();
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static void execute_from_lexer(mp_lexer_t *lex, mp_parse_input_kind_t input_kind, bool is_repl) {
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if (lex == NULL) {
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return;
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}
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if (0) {
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// just tokenise
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while (!mp_lexer_is_kind(lex, MP_TOKEN_END)) {
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mp_token_show(mp_lexer_cur(lex));
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mp_lexer_to_next(lex);
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}
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mp_lexer_free(lex);
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return;
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}
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qstr parse_exc_id;
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const char *parse_exc_msg;
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mp_parse_node_t pn = mp_parse(lex, input_kind, &parse_exc_id, &parse_exc_msg);
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if (pn == MP_PARSE_NODE_NULL) {
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// parse error
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mp_lexer_show_error_pythonic_prefix(lex);
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printf("%s: %s\n", qstr_str(parse_exc_id), parse_exc_msg);
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mp_lexer_free(lex);
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return;
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}
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qstr source_name = mp_lexer_source_name(lex);
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mp_lexer_free(lex);
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/*
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printf("----------------\n");
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mp_parse_node_print(pn, 0);
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printf("----------------\n");
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*/
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mp_obj_t module_fun = mp_compile(pn, source_name, is_repl);
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if (module_fun == mp_const_none) {
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// compile error
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return;
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}
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// execute it
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nlr_buf_t nlr;
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if (nlr_push(&nlr) == 0) {
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rt_call_function_0(module_fun);
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nlr_pop();
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} else {
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// uncaught exception
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mp_obj_print_exception((mp_obj_t)nlr.ret_val);
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}
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}
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static char *str_join(const char *s1, int sep_char, const char *s2) {
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int l1 = strlen(s1);
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int l2 = strlen(s2);
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char *s = m_new(char, l1 + l2 + 2);
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memcpy(s, s1, l1);
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if (sep_char != 0) {
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s[l1] = sep_char;
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l1 += 1;
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}
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memcpy(s + l1, s2, l2);
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s[l1 + l2] = 0;
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return s;
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}
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static char *prompt(char *p) {
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#if MICROPY_USE_READLINE
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char *line = readline(p);
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if (line) {
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add_history(line);
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}
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#else
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static char buf[256];
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fputs(p, stdout);
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char *s = fgets(buf, sizeof(buf), stdin);
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if (!s) {
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return NULL;
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}
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int l = strlen(buf);
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if (buf[l - 1] == '\n') {
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buf[l - 1] = 0;
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} else {
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l++;
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}
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char *line = malloc(l);
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memcpy(line, buf, l);
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#endif
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return line;
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}
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static void do_repl(void) {
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for (;;) {
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char *line = prompt(">>> ");
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if (line == NULL) {
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// EOF
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return;
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}
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if (mp_repl_is_compound_stmt(line)) {
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for (;;) {
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char *line2 = prompt("... ");
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if (line2 == NULL || strlen(line2) == 0) {
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break;
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}
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char *line3 = str_join(line, '\n', line2);
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free(line);
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free(line2);
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line = line3;
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}
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}
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, line, strlen(line), false);
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execute_from_lexer(lex, MP_PARSE_SINGLE_INPUT, true);
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free(line);
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}
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}
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static void do_file(const char *file) {
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// hack: set dir for import based on where this file is
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{
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const char * s = strrchr(file, '/');
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if (s != NULL) {
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int len = s - file;
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char *dir = m_new(char, len + 1);
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memcpy(dir, file, len);
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dir[len] = '\0';
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mp_import_set_directory(dir);
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}
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}
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mp_lexer_t *lex = mp_lexer_new_from_file(file);
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execute_from_lexer(lex, MP_PARSE_FILE_INPUT, false);
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}
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static void do_str(const char *str) {
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mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_stdin_gt_, str, strlen(str), false);
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execute_from_lexer(lex, MP_PARSE_SINGLE_INPUT, false);
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}
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typedef struct _test_obj_t {
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mp_obj_base_t base;
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int value;
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} test_obj_t;
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static void test_print(void (*print)(void *env, const char *fmt, ...), void *env, mp_obj_t self_in, mp_print_kind_t kind) {
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test_obj_t *self = self_in;
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print(env, "<test %d>", self->value);
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}
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static mp_obj_t test_get(mp_obj_t self_in) {
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test_obj_t *self = self_in;
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return mp_obj_new_int(self->value);
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}
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static mp_obj_t test_set(mp_obj_t self_in, mp_obj_t arg) {
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test_obj_t *self = self_in;
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self->value = mp_obj_get_int(arg);
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return mp_const_none;
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}
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static MP_DEFINE_CONST_FUN_OBJ_1(test_get_obj, test_get);
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static MP_DEFINE_CONST_FUN_OBJ_2(test_set_obj, test_set);
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static const mp_method_t test_methods[] = {
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{ "get", &test_get_obj },
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{ "set", &test_set_obj },
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{ NULL, NULL },
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};
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static const mp_obj_type_t test_type = {
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{ &mp_const_type },
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"Test",
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.print = test_print,
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.methods = test_methods,
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};
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mp_obj_t test_obj_new(int value) {
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test_obj_t *o = m_new_obj(test_obj_t);
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o->base.type = &test_type;
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o->value = value;
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return o;
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}
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int usage(void) {
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printf("usage: py [-c <command>] [<filename>]\n");
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return 1;
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}
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int main(int argc, char **argv) {
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qstr_init();
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rt_init();
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mp_obj_t m_sys = mp_obj_new_module(MP_QSTR_sys);
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mp_obj_t py_argv = mp_obj_new_list(0, NULL);
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rt_store_attr(m_sys, MP_QSTR_argv, py_argv);
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rt_store_name(qstr_from_str("test"), test_obj_new(42));
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file_init();
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rawsocket_init();
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ffi_init();
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// Here is some example code to create a class and instance of that class.
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// First is the Python, then the C code.
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//
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// class TestClass:
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// pass
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// test_obj = TestClass()
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// test_obj.attr = 42
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mp_obj_t test_class_type, test_class_instance;
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test_class_type = mp_obj_new_type("TestClass", mp_const_empty_tuple, mp_obj_new_dict(0));
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rt_store_name(QSTR_FROM_STR_STATIC("test_obj"), test_class_instance = rt_call_function_0(test_class_type));
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rt_store_attr(test_class_instance, QSTR_FROM_STR_STATIC("attr"), mp_obj_new_int(42));
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/*
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printf("bytes:\n");
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printf(" total %d\n", m_get_total_bytes_allocated());
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printf(" cur %d\n", m_get_current_bytes_allocated());
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printf(" peak %d\n", m_get_peak_bytes_allocated());
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*/
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if (argc == 1) {
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do_repl();
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} else {
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for (int a = 1; a < argc; a++) {
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if (argv[a][0] == '-') {
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if (strcmp(argv[a], "-c") == 0) {
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if (a + 1 >= argc) {
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return usage();
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}
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do_str(argv[a + 1]);
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a += 1;
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} else {
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return usage();
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}
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} else {
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for (int i = a; i < argc; i++) {
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rt_list_append(py_argv, MP_OBJ_NEW_QSTR(qstr_from_str(argv[i])));
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}
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do_file(argv[a]);
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break;
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}
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}
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}
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rt_deinit();
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//printf("total bytes = %d\n", m_get_total_bytes_allocated());
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return 0;
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}
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// for sqrt
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#include <math.h>
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machine_float_t machine_sqrt(machine_float_t x) {
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return sqrt(x);
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}
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