1 files changed, 61 insertions, 0 deletions
diff --git a/circuitpython/py/emitcommon.c b/circuitpython/py/emitcommon.c
new file mode 100644
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--- /dev/null
+++ b/circuitpython/py/emitcommon.c
@@ -0,0 +1,61 @@
+/*
+ * This file is part of the MicroPython project, http://micropython.org/
+ *
+ * The MIT License (MIT)
+ *
+ * SPDX-FileCopyrightText: 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_modification(scope_t *scope, qstr qst) {
+    // name adding/lookup
+    id_info_t *id = scope_find_or_add_id(scope, qst, ID_INFO_KIND_GLOBAL_IMPLICIT);
+    if (SCOPE_IS_FUNC_LIKE(scope->kind) && 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->global(emit, qst, MP_EMIT_IDOP_GLOBAL_NAME);
+    } else if (id->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
+        emit_method_table->global(emit, qst, MP_EMIT_IDOP_GLOBAL_GLOBAL);
+    } else if (id->kind == ID_INFO_KIND_LOCAL) {
+        emit_method_table->local(emit, qst, id->local_num, MP_EMIT_IDOP_LOCAL_FAST);
+    } else {
+        assert(id->kind == ID_INFO_KIND_CELL || id->kind == ID_INFO_KIND_FREE);
+        emit_method_table->local(emit, qst, id->local_num, MP_EMIT_IDOP_LOCAL_DEREF);
+    }
+}
+
+#endif // MICROPY_ENABLE_COMPILER