Diff: py/objmodule.c

Revision:

0:5868e8752d44

Child:

2:c89e95946844

diff -r 000000000000 -r 5868e8752d44 py/objmodule.c
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/py/objmodule.c	Sat Apr 16 17:11:56 2016 +0000
@@ -0,0 +1,246 @@
+/*
+ * 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 <stdlib.h>
+#include <assert.h>
+
+#include "py/mpstate.h"
+#include "py/nlr.h"
+#include "py/objmodule.h"
+#include "py/runtime.h"
+#include "py/builtin.h"
+
+STATIC void module_print(const mp_print_t *print, mp_obj_t self_in, mp_print_kind_t kind) {
+    (void)kind;
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+
+#if MICROPY_PY___FILE__
+    // If we store __file__ to imported modules then try to lookup this
+    // symbol to give more information about the module.
+    mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(MP_QSTR___file__), MP_MAP_LOOKUP);
+    if (elem != NULL) {
+        mp_printf(print, "<module '%q' from '%s'>", self->name, mp_obj_str_get_str(elem->value));
+        return;
+    }
+#endif
+
+    mp_printf(print, "<module '%q'>", self->name);
+}
+
+STATIC void module_attr(mp_obj_t self_in, qstr attr, mp_obj_t *dest) {
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+    if (dest[0] == MP_OBJ_NULL) {
+        // load attribute
+        mp_map_elem_t *elem = mp_map_lookup(&self->globals->map, MP_OBJ_NEW_QSTR(attr), MP_MAP_LOOKUP);
+        if (elem != NULL) {
+            dest[0] = elem->value;
+        }
+    } else {
+        // delete/store attribute
+        mp_obj_dict_t *dict = self->globals;
+        if (dict->map.is_fixed) {
+            #if MICROPY_CAN_OVERRIDE_BUILTINS
+            if (dict == &mp_module_builtins_globals) {
+                if (MP_STATE_VM(mp_module_builtins_override_dict) == NULL) {
+                    MP_STATE_VM(mp_module_builtins_override_dict) = MP_OBJ_TO_PTR(mp_obj_new_dict(1));
+                }
+                dict = MP_STATE_VM(mp_module_builtins_override_dict);
+            } else
+            #endif
+            {
+                // can't delete or store to fixed map
+                return;
+            }
+        }
+        if (dest[1] == MP_OBJ_NULL) {
+            // delete attribute
+            mp_obj_dict_delete(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr));
+        } else {
+            // store attribute
+            // TODO CPython allows STORE_ATTR to a module, but is this the correct implementation?
+            mp_obj_dict_store(MP_OBJ_FROM_PTR(dict), MP_OBJ_NEW_QSTR(attr), dest[1]);
+        }
+        dest[0] = MP_OBJ_NULL; // indicate success
+    }
+}
+
+const mp_obj_type_t mp_type_module = {
+    { &mp_type_type },
+    .name = MP_QSTR_module,
+    .print = module_print,
+    .attr = module_attr,
+};
+
+mp_obj_t mp_obj_new_module(qstr module_name) {
+    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
+    mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND);
+    // We could error out if module already exists, but let C extensions
+    // add new members to existing modules.
+    if (el->value != MP_OBJ_NULL) {
+        return el->value;
+    }
+
+    // create new module object
+    mp_obj_module_t *o = m_new_obj(mp_obj_module_t);
+    o->base.type = &mp_type_module;
+    o->name = module_name;
+    o->globals = MP_OBJ_TO_PTR(mp_obj_new_dict(MICROPY_MODULE_DICT_SIZE));
+
+    // store __name__ entry in the module
+    mp_obj_dict_store(MP_OBJ_FROM_PTR(o->globals), MP_OBJ_NEW_QSTR(MP_QSTR___name__), MP_OBJ_NEW_QSTR(module_name));
+
+    // store the new module into the slot in the global dict holding all modules
+    el->value = MP_OBJ_FROM_PTR(o);
+
+    // return the new module
+    return MP_OBJ_FROM_PTR(o);
+}
+
+mp_obj_dict_t *mp_obj_module_get_globals(mp_obj_t self_in) {
+    assert(MP_OBJ_IS_TYPE(self_in, &mp_type_module));
+    mp_obj_module_t *self = MP_OBJ_TO_PTR(self_in);
+    return self->globals;
+}
+
+/******************************************************************************/
+// Global module table and related functions
+
+STATIC const mp_rom_map_elem_t mp_builtin_module_table[] = {
+    { MP_ROM_QSTR(MP_QSTR___main__), MP_ROM_PTR(&mp_module___main__) },
+    { MP_ROM_QSTR(MP_QSTR_builtins), MP_ROM_PTR(&mp_module_builtins) },
+    { MP_ROM_QSTR(MP_QSTR_micropython), MP_ROM_PTR(&mp_module_micropython) },
+
+#if MICROPY_PY_ARRAY
+    { MP_ROM_QSTR(MP_QSTR_array), MP_ROM_PTR(&mp_module_array) },
+#endif
+#if MICROPY_PY_IO
+    { MP_ROM_QSTR(MP_QSTR__io), MP_ROM_PTR(&mp_module_io) },
+#endif
+#if MICROPY_PY_COLLECTIONS
+    { MP_ROM_QSTR(MP_QSTR__collections), MP_ROM_PTR(&mp_module_collections) },
+#endif
+#if MICROPY_PY_STRUCT
+    { MP_ROM_QSTR(MP_QSTR_ustruct), MP_ROM_PTR(&mp_module_ustruct) },
+#endif
+
+#if MICROPY_PY_BUILTINS_FLOAT
+#if MICROPY_PY_MATH
+    { MP_ROM_QSTR(MP_QSTR_math), MP_ROM_PTR(&mp_module_math) },
+#endif
+#if MICROPY_PY_BUILTINS_COMPLEX && MICROPY_PY_CMATH
+    { MP_ROM_QSTR(MP_QSTR_cmath), MP_ROM_PTR(&mp_module_cmath) },
+#endif
+#endif
+#if MICROPY_PY_SYS
+    { MP_ROM_QSTR(MP_QSTR_sys), MP_ROM_PTR(&mp_module_sys) },
+#endif
+#if MICROPY_PY_GC && MICROPY_ENABLE_GC
+    { MP_ROM_QSTR(MP_QSTR_gc), MP_ROM_PTR(&mp_module_gc) },
+#endif
+
+    // extmod modules
+
+#if MICROPY_PY_UCTYPES
+    { MP_ROM_QSTR(MP_QSTR_uctypes), MP_ROM_PTR(&mp_module_uctypes) },
+#endif
+#if MICROPY_PY_UZLIB
+    { MP_ROM_QSTR(MP_QSTR_uzlib), MP_ROM_PTR(&mp_module_uzlib) },
+#endif
+#if MICROPY_PY_UJSON
+    { MP_ROM_QSTR(MP_QSTR_ujson), MP_ROM_PTR(&mp_module_ujson) },
+#endif
+#if MICROPY_PY_URE
+    { MP_ROM_QSTR(MP_QSTR_ure), MP_ROM_PTR(&mp_module_ure) },
+#endif
+#if MICROPY_PY_UHEAPQ
+    { MP_ROM_QSTR(MP_QSTR_uheapq), MP_ROM_PTR(&mp_module_uheapq) },
+#endif
+#if MICROPY_PY_UHASHLIB
+    { MP_ROM_QSTR(MP_QSTR_uhashlib), MP_ROM_PTR(&mp_module_uhashlib) },
+#endif
+#if MICROPY_PY_UBINASCII
+    { MP_ROM_QSTR(MP_QSTR_ubinascii), MP_ROM_PTR(&mp_module_ubinascii) },
+#endif
+#if MICROPY_PY_URANDOM
+    { MP_ROM_QSTR(MP_QSTR_urandom), MP_ROM_PTR(&mp_module_urandom) },
+#endif
+#if MICROPY_PY_USSL
+    { MP_ROM_QSTR(MP_QSTR_ussl), MP_ROM_PTR(&mp_module_ussl) },
+#endif
+#if MICROPY_PY_LWIP
+    { MP_ROM_QSTR(MP_QSTR_lwip), MP_ROM_PTR(&mp_module_lwip) },
+#endif
+#if MICROPY_PY_WEBSOCKET
+    { MP_ROM_QSTR(MP_QSTR_websocket), MP_ROM_PTR(&mp_module_websocket) },
+#endif
+
+    // extra builtin modules as defined by a port
+    MICROPY_PORT_BUILTIN_MODULES
+};
+
+STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_map, mp_builtin_module_table);
+
+void mp_module_init(void) {
+    mp_obj_dict_init(&MP_STATE_VM(mp_loaded_modules_dict), 3);
+}
+
+void mp_module_deinit(void) {
+    //mp_map_deinit(&MP_STATE_VM(mp_loaded_modules_map));
+}
+
+// returns MP_OBJ_NULL if not found
+mp_obj_t mp_module_get(qstr module_name) {
+    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
+    // lookup module
+    mp_map_elem_t *el = mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+
+    if (el == NULL) {
+        // module not found, look for builtin module names
+        el = mp_map_lookup((mp_map_t*)&mp_builtin_module_map, MP_OBJ_NEW_QSTR(module_name), MP_MAP_LOOKUP);
+        if (el == NULL) {
+            return MP_OBJ_NULL;
+        }
+
+        if (MICROPY_MODULE_BUILTIN_INIT) {
+            // look for __init__ and call it if it exists
+            mp_obj_t dest[2];
+            mp_load_method_maybe(el->value, MP_QSTR___init__, dest);
+            if (dest[0] != MP_OBJ_NULL) {
+                mp_call_method_n_kw(0, 0, dest);
+                // register module so __init__ is not called again
+                mp_module_register(module_name, el->value);
+            }
+        }
+    }
+
+    // module found, return it
+    return el->value;
+}
+
+void mp_module_register(qstr qst, mp_obj_t module) {
+    mp_map_t *mp_loaded_modules_map = &MP_STATE_VM(mp_loaded_modules_dict).map;
+    mp_map_lookup(mp_loaded_modules_map, MP_OBJ_NEW_QSTR(qst), MP_MAP_LOOKUP_ADD_IF_NOT_FOUND)->value = module;
+}