Diff: py/builtinevex.c

Revision:

0:5868e8752d44

--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/py/builtinevex.c	Sat Apr 16 17:11:56 2016 +0000
@@ -0,0 +1,168 @@
+/*
+ * 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 <stdint.h>
+
+#include "py/nlr.h"
+#include "py/objfun.h"
+#include "py/compile.h"
+#include "py/runtime.h"
+#include "py/builtin.h"
+
+#if MICROPY_PY_BUILTINS_COMPILE
+
+typedef struct _mp_obj_code_t {
+    mp_obj_base_t base;
+    mp_obj_t module_fun;
+} mp_obj_code_t;
+
+STATIC const mp_obj_type_t mp_type_code = {
+    { &mp_type_type },
+    .name = MP_QSTR_code,
+};
+
+STATIC mp_obj_t code_execute(mp_obj_code_t *self, mp_obj_dict_t *globals, mp_obj_dict_t *locals) {
+    // save context and set new context
+    mp_obj_dict_t *old_globals = mp_globals_get();
+    mp_obj_dict_t *old_locals = mp_locals_get();
+    mp_globals_set(globals);
+    mp_locals_set(locals);
+
+    // a bit of a hack: fun_bc will re-set globals, so need to make sure it's
+    // the correct one
+    if (MP_OBJ_IS_TYPE(self->module_fun, &mp_type_fun_bc)) {
+        mp_obj_fun_bc_t *fun_bc = MP_OBJ_TO_PTR(self->module_fun);
+        fun_bc->globals = globals;
+    }
+
+    // execute code
+    nlr_buf_t nlr;
+    if (nlr_push(&nlr) == 0) {
+        mp_obj_t ret = mp_call_function_0(self->module_fun);
+        nlr_pop();
+        mp_globals_set(old_globals);
+        mp_locals_set(old_locals);
+        return ret;
+    } else {
+        // exception; restore context and re-raise same exception
+        mp_globals_set(old_globals);
+        mp_locals_set(old_locals);
+        nlr_jump(nlr.ret_val);
+    }
+}
+
+STATIC mp_obj_t mp_builtin_compile(size_t n_args, const mp_obj_t *args) {
+    (void)n_args;
+
+    // get the source
+    mp_uint_t str_len;
+    const char *str = mp_obj_str_get_data(args[0], &str_len);
+
+    // get the filename
+    qstr filename = mp_obj_str_get_qstr(args[1]);
+
+    // create the lexer
+    mp_lexer_t *lex = mp_lexer_new_from_str_len(filename, str, str_len, 0);
+
+    // get the compile mode
+    qstr mode = mp_obj_str_get_qstr(args[2]);
+    mp_parse_input_kind_t parse_input_kind;
+    switch (mode) {
+        case MP_QSTR_single: parse_input_kind = MP_PARSE_SINGLE_INPUT; break;
+        case MP_QSTR_exec: parse_input_kind = MP_PARSE_FILE_INPUT; break;
+        case MP_QSTR_eval: parse_input_kind = MP_PARSE_EVAL_INPUT; break;
+        default:
+            nlr_raise(mp_obj_new_exception_msg(&mp_type_ValueError, "bad compile mode"));
+    }
+
+    mp_obj_code_t *code = m_new_obj(mp_obj_code_t);
+    code->base.type = &mp_type_code;
+    code->module_fun = mp_parse_compile_execute(lex, parse_input_kind, NULL, NULL);
+    return MP_OBJ_FROM_PTR(code);
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_compile_obj, 3, 6, mp_builtin_compile);
+
+#endif // MICROPY_PY_BUILTINS_COMPILE
+
+#if MICROPY_PY_BUILTINS_EVAL_EXEC
+
+STATIC mp_obj_t eval_exec_helper(size_t n_args, const mp_obj_t *args, mp_parse_input_kind_t parse_input_kind) {
+    // work out the context
+    mp_obj_dict_t *globals = mp_globals_get();
+    mp_obj_dict_t *locals = mp_locals_get();
+    if (n_args > 1) {
+        globals = MP_OBJ_TO_PTR(args[1]);
+        if (n_args > 2) {
+            locals = MP_OBJ_TO_PTR(args[2]);
+        } else {
+            locals = globals;
+        }
+    }
+
+    #if MICROPY_PY_BUILTINS_COMPILE
+    if (MP_OBJ_IS_TYPE(args[0], &mp_type_code)) {
+        return code_execute(MP_OBJ_TO_PTR(args[0]), globals, locals);
+    }
+    #endif
+
+    mp_uint_t str_len;
+    const char *str = mp_obj_str_get_data(args[0], &str_len);
+
+    // create the lexer
+    // MP_PARSE_SINGLE_INPUT is used to indicate a file input
+    mp_lexer_t *lex;
+    if (MICROPY_PY_BUILTINS_EXECFILE && parse_input_kind == MP_PARSE_SINGLE_INPUT) {
+        lex = mp_lexer_new_from_file(str);
+        if (lex == NULL) {
+            nlr_raise(mp_obj_new_exception_msg_varg(&mp_type_OSError, "could not open file '%s'", str));
+        }
+        parse_input_kind = MP_PARSE_FILE_INPUT;
+    } else {
+        lex = mp_lexer_new_from_str_len(MP_QSTR__lt_string_gt_, str, str_len, 0);
+    }
+
+    return mp_parse_compile_execute(lex, parse_input_kind, globals, locals);
+}
+
+STATIC mp_obj_t mp_builtin_eval(size_t n_args, const mp_obj_t *args) {
+    return eval_exec_helper(n_args, args, MP_PARSE_EVAL_INPUT);
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_eval_obj, 1, 3, mp_builtin_eval);
+
+STATIC mp_obj_t mp_builtin_exec(size_t n_args, const mp_obj_t *args) {
+    return eval_exec_helper(n_args, args, MP_PARSE_FILE_INPUT);
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_exec_obj, 1, 3, mp_builtin_exec);
+
+#endif // MICROPY_PY_BUILTINS_EVAL_EXEC
+
+#if MICROPY_PY_BUILTINS_EXECFILE
+STATIC mp_obj_t mp_builtin_execfile(size_t n_args, const mp_obj_t *args) {
+    // MP_PARSE_SINGLE_INPUT is used to indicate a file input
+    return eval_exec_helper(n_args, args, MP_PARSE_SINGLE_INPUT);
+}
+MP_DEFINE_CONST_FUN_OBJ_VAR_BETWEEN(mp_builtin_execfile_obj, 1, 3, mp_builtin_execfile);
+#endif