emitcommon.c 2.87 KB
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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.
 */

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#include <assert.h>

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#include "py/emit.h"
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#if MICROPY_ENABLE_COMPILER

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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) {
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        scope_find_local_and_close_over(scope, id, qst);
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    }
}

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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) {
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        if (SCOPE_IS_FUNC_LIKE(scope->kind)) {
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            id->kind = ID_INFO_KIND_LOCAL;
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        } else {
            id->kind = ID_INFO_KIND_GLOBAL_IMPLICIT;
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        }
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    } else if (SCOPE_IS_FUNC_LIKE(scope->kind) && id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
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        // rebind as a local variable
        id->kind = ID_INFO_KIND_LOCAL;
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    }
}

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

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    id_info_t *id = scope_find(scope, qst);
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    assert(id != NULL);
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    // call the emit backend with the correct code
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    if (id->kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
        emit_method_table->name(emit, qst);
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    } else if (id->kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
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        emit_method_table->global(emit, qst);
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    } else if (id->kind == ID_INFO_KIND_LOCAL) {
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        emit_method_table->fast(emit, qst, id->local_num);
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    } else {
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        assert(id->kind == ID_INFO_KIND_CELL || id->kind == ID_INFO_KIND_FREE);
        emit_method_table->deref(emit, qst, id->local_num);
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    }
}
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#endif // MICROPY_ENABLE_COMPILER