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py: Allow builtins to be overridden.
This patch adds a configuration option (MICROPY_CAN_OVERRIDE_BUILTINS) which, when enabled, allows to override all names within the builtins module. A builtins override dict is created the first time the user assigns to a name in the builtins model, and then that dict is searched first on subsequent lookups. Note that this implementation doesn't allow deleting of names. This patch also does some refactoring of builtins code, creating the modbuiltins.c file. Addresses issue adafruit#959.
1 parent e6e8ad8 commit 78d702c

14 files changed

Lines changed: 283 additions & 307 deletions

‎py/builtin.h‎

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Original file line numberDiff line numberDiff line change
@@ -73,6 +73,7 @@ MP_DECLARE_CONST_FUN_OBJ(mp_op_setitem_obj);
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MP_DECLARE_CONST_FUN_OBJ(mp_op_delitem_obj);
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extern const mp_obj_module_t mp_module___main__;
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extern const mp_obj_module_t mp_module_builtins;
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extern const mp_obj_module_t mp_module_array;
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extern const mp_obj_module_t mp_module_collections;
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extern const mp_obj_module_t mp_module_io;
@@ -83,6 +84,9 @@ extern const mp_obj_module_t mp_module_struct;
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extern const mp_obj_module_t mp_module_sys;
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extern const mp_obj_module_t mp_module_gc;
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extern const mp_obj_dict_t mp_module_builtins_globals;
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extern mp_obj_dict_t *mp_module_builtins_override_dict;
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struct _dummy_t;
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extern struct _dummy_t mp_sys_stdin_obj;
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extern struct _dummy_t mp_sys_stdout_obj;

‎py/builtinimport.c‎

Lines changed: 9 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -44,7 +44,6 @@
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#include "runtime0.h"
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#include "runtime.h"
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#include "builtin.h"
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#include "builtintables.h"
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#if 0 // print debugging info
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#define DEBUG_PRINT (1)
@@ -56,6 +55,14 @@
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#define PATH_SEP_CHAR '/'
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#if MICROPY_MODULE_WEAK_LINKS
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STATIC const mp_map_elem_t mp_builtin_module_weak_links_table[] = {
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MICROPY_PORT_BUILTIN_MODULE_WEAK_LINKS
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};
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STATIC MP_DEFINE_CONST_MAP(mp_builtin_module_weak_links_map, mp_builtin_module_weak_links_table);
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#endif
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bool mp_obj_is_package(mp_obj_t module) {
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mp_obj_t dest[2];
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mp_load_method_maybe(module, MP_QSTR___path__, dest);
@@ -270,7 +277,7 @@ mp_obj_t mp_builtin___import__(mp_uint_t n_args, const mp_obj_t *args) {
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#if MICROPY_MODULE_WEAK_LINKS
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// check if there is a weak link to this module
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if (i == mod_len) {
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mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_dict_obj.map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP);
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mp_map_elem_t *el = mp_map_lookup((mp_map_t*)&mp_builtin_module_weak_links_map, MP_OBJ_NEW_QSTR(mod_name), MP_MAP_LOOKUP);
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if (el == NULL) {
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goto no_exist;
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}

‎py/builtintables.c‎

Lines changed: 0 additions & 261 deletions
This file was deleted.

‎py/builtintables.h‎

Lines changed: 0 additions & 32 deletions
This file was deleted.

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