py: Implement builtin exec.

1 files changed, 64 insertions, 0 deletions

diff --git a/py/builtinevex.c b/py/builtinevex.c
new file mode 100644
index 000000000..03db86273
--- /dev/null
+++ b/py/builtinevex.c
@@ -0,0 +1,64 @@
+#include <stdint.h>
+#include <stdlib.h>
+#include <stdio.h>
+#include <stdarg.h>
+#include <string.h>
+#include <assert.h>
+
+#include "nlr.h"
+#include "misc.h"
+#include "mpconfig.h"
+#include "qstr.h"
+#include "lexer.h"
+#include "lexerunix.h"
+#include "parse.h"
+#include "obj.h"
+#include "compile.h"
+#include "runtime0.h"
+#include "runtime.h"
+#include "map.h"
+#include "builtin.h"
+
+static mp_obj_t parse_compile_execute(mp_obj_t o_in, mp_parse_input_kind_t parse_input_kind) {
+    uint str_len;
+    const byte *str = mp_obj_str_get_data(o_in, &str_len);
+
+    // create the lexer
+    mp_lexer_t *lex = mp_lexer_new_from_str_len(MP_QSTR__lt_string_gt_, (const char*)str, str_len, 0);
+    qstr source_name = mp_lexer_source_name(lex);
+
+    // parse the string
+    qstr parse_exc_id;
+    const char *parse_exc_msg;
+    mp_parse_node_t pn = mp_parse(lex, parse_input_kind, &parse_exc_id, &parse_exc_msg);
+    mp_lexer_free(lex);
+
+    if (pn == MP_PARSE_NODE_NULL) {
+        // parse error; raise exception
+        nlr_jump(mp_obj_new_exception_msg(parse_exc_id, parse_exc_msg));
+    }
+
+    // compile the string
+    mp_obj_t module_fun = mp_compile(pn, source_name, false);
+    mp_parse_node_free(pn);
+
+    if (module_fun == mp_const_none) {
+        // TODO handle compile error correctly
+        return mp_const_none;
+    }
+
+    // complied successfully, execute it
+    return rt_call_function_0(module_fun);
+}
+
+static mp_obj_t mp_builtin_eval(mp_obj_t o_in) {
+    return parse_compile_execute(o_in, MP_PARSE_EVAL_INPUT);
+}
+
+MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_eval_obj, mp_builtin_eval);
+
+static mp_obj_t mp_builtin_exec(mp_obj_t o_in) {
+    return parse_compile_execute(o_in, MP_PARSE_FILE_INPUT);
+}
+
+MP_DEFINE_CONST_FUN_OBJ_1(mp_builtin_exec_obj, mp_builtin_exec);