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/*

* 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 <assert.h>

#include "py/emit.h"

#if MICROPY_ENABLE_COMPILER

void mp_emit_common_get_id_for_load(scope_t *scope, qstr qst) {

// name adding/lookup

bool added;

id_info_t *id = scope_find_or_add_id(scope, qst, &added);

if (added) {

id_info_t *id2 = scope_find_local_in_parent(scope, qst);

if (id2 != NULL && (id2->kind == ID_INFO_KIND_LOCAL || id2->kind == ID_INFO_KIND_CELL || id2->kind == ID_INFO_KIND_FREE)) {

id->kind = ID_INFO_KIND_FREE;

scope_close_over_in_parents(scope, qst);

} else {

id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;

}

}

}

void mp_emit_common_get_id_for_modification(scope_t *scope, qstr qst) {

// name adding/lookup

bool added;

id_info_t *id = scope_find_or_add_id(scope, qst, &added);

if (added) {

if (scope->kind == SCOPE_MODULE || scope->kind == SCOPE_CLASS) {

id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;

} else {

id->kind = ID_INFO_KIND_LOCAL;

}

} else if (scope->kind >= SCOPE_FUNCTION && scope->kind <= SCOPE_GEN_EXPR && id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {

// rebind as a local variable

id->kind = ID_INFO_KIND_LOCAL;

}

}

void mp_emit_common_id_op(emit_t *emit, const mp_emit_method_table_id_ops_t *emit_method_table, scope_t *scope, qstr qst) {

// assumes pass is greater than 1, ie that all identifiers are defined in the scope

id_info_t *id = scope_find(scope, qst);

assert(id != NULL);

// call the emit backend with the correct code

if (id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {

emit_method_table->name(emit, qst);

} else if (id->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {

emit_method_table->global(emit, qst);

} else if (id->kind == ID_INFO_KIND_LOCAL) {

emit_method_table->fast(emit, qst, id->local_num);

} else {

assert(id->kind == ID_INFO_KIND_CELL || id->kind == ID_INFO_KIND_FREE);

emit_method_table->deref(emit, qst, id->local_num);

}

}

#endif // MICROPY_ENABLE_COMPILER