04b9147e15
Blanket wide to all .c and .h files. Some files originating from ST are difficult to deal with (license wise) so it was left out of those. Also merged modpyb.h, modos.h, modstm.h and modtime.h in stmhal/.
270 lines
9.0 KiB
C
270 lines
9.0 KiB
C
/*
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* This file is part of the Micro Python project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013, 2014 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <stdbool.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <assert.h>
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#include "misc.h"
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#include "mpconfig.h"
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#include "qstr.h"
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#include "obj.h"
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#include "parse.h"
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#include "emitglue.h"
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#include "scope.h"
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scope_t *scope_new(scope_kind_t kind, mp_parse_node_t pn, qstr source_file, uint emit_options) {
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scope_t *scope = m_new0(scope_t, 1);
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scope->kind = kind;
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scope->pn = pn;
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scope->source_file = source_file;
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switch (kind) {
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case SCOPE_MODULE:
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scope->simple_name = MP_QSTR__lt_module_gt_;
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break;
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case SCOPE_FUNCTION:
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case SCOPE_CLASS:
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assert(MP_PARSE_NODE_IS_STRUCT(pn));
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scope->simple_name = MP_PARSE_NODE_LEAF_ARG(((mp_parse_node_struct_t*)pn)->nodes[0]);
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break;
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case SCOPE_LAMBDA:
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scope->simple_name = MP_QSTR__lt_lambda_gt_;
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break;
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case SCOPE_LIST_COMP:
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scope->simple_name = MP_QSTR__lt_listcomp_gt_;
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break;
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case SCOPE_DICT_COMP:
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scope->simple_name = MP_QSTR__lt_dictcomp_gt_;
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break;
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case SCOPE_SET_COMP:
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scope->simple_name = MP_QSTR__lt_setcomp_gt_;
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break;
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case SCOPE_GEN_EXPR:
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scope->simple_name = MP_QSTR__lt_genexpr_gt_;
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break;
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default:
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assert(0);
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}
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scope->raw_code = mp_emit_glue_new_raw_code();
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scope->emit_options = emit_options;
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scope->id_info_alloc = 8;
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scope->id_info = m_new(id_info_t, scope->id_info_alloc);
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return scope;
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}
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void scope_free(scope_t *scope) {
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m_del(id_info_t, scope->id_info, scope->id_info_alloc);
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m_del(scope_t, scope, 1);
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}
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id_info_t *scope_find_or_add_id(scope_t *scope, qstr qstr, bool *added) {
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for (int i = 0; i < scope->id_info_len; i++) {
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if (scope->id_info[i].qstr == qstr) {
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*added = false;
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return &scope->id_info[i];
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}
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}
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// make sure we have enough memory
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if (scope->id_info_len >= scope->id_info_alloc) {
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scope->id_info = m_renew(id_info_t, scope->id_info, scope->id_info_alloc, scope->id_info_alloc * 2);
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scope->id_info_alloc *= 2;
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}
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// add new id to end of array of all ids; this seems to match CPython
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// important thing is that function arguments are first, but that is
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// handled by the compiler because it adds arguments before compiling the body
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id_info_t *id_info = &scope->id_info[scope->id_info_len++];
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id_info->kind = 0;
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id_info->flags = 0;
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id_info->local_num = 0;
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id_info->qstr = qstr;
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*added = true;
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return id_info;
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}
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id_info_t *scope_find(scope_t *scope, qstr qstr) {
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for (int i = 0; i < scope->id_info_len; i++) {
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if (scope->id_info[i].qstr == qstr) {
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return &scope->id_info[i];
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}
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}
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return NULL;
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}
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id_info_t *scope_find_global(scope_t *scope, qstr qstr) {
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while (scope->parent != NULL) {
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scope = scope->parent;
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}
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for (int i = 0; i < scope->id_info_len; i++) {
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if (scope->id_info[i].qstr == qstr) {
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return &scope->id_info[i];
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}
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}
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return NULL;
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}
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id_info_t *scope_find_local_in_parent(scope_t *scope, qstr qstr) {
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if (scope->parent == NULL) {
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return NULL;
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}
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for (scope_t *s = scope->parent; s->parent != NULL; s = s->parent) {
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].qstr == qstr) {
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return &s->id_info[i];
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}
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}
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}
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return NULL;
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}
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void scope_close_over_in_parents(scope_t *scope, qstr qstr) {
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assert(scope->parent != NULL); // we should have at least 1 parent
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for (scope_t *s = scope->parent; s->parent != NULL; s = s->parent) {
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id_info_t *id = NULL;
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].qstr == qstr) {
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id = &s->id_info[i];
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break;
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}
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}
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if (id == NULL) {
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// variable not declared in this scope, so declare it as free and keep searching parents
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bool added;
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id = scope_find_or_add_id(s, qstr, &added);
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assert(added);
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id->kind = ID_INFO_KIND_FREE;
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} else {
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// variable is declared in this scope, so finish
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switch (id->kind) {
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case ID_INFO_KIND_LOCAL: id->kind = ID_INFO_KIND_CELL; break; // variable local to this scope, close it over
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case ID_INFO_KIND_FREE: break; // variable already closed over in a parent scope
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case ID_INFO_KIND_CELL: break; // variable already closed over in this scope
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default: assert(0); // TODO
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}
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return;
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}
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}
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assert(0); // we should have found the variable in one of the parents
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}
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void scope_declare_global(scope_t *scope, qstr qstr) {
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if (scope->kind == SCOPE_MODULE) {
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printf("SyntaxError?: can't declare global in outer code\n");
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return;
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}
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bool added;
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id_info_t *id_info = scope_find_or_add_id(scope, qstr, &added);
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if (!added) {
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printf("SyntaxError?: identifier already declared something\n");
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return;
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}
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id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
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// if the id exists in the global scope, set its kind to EXPLICIT_GLOBAL
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id_info = scope_find_global(scope, qstr);
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if (id_info != NULL) {
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id_info->kind = ID_INFO_KIND_GLOBAL_EXPLICIT;
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}
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}
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void scope_declare_nonlocal(scope_t *scope, qstr qstr) {
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if (scope->kind == SCOPE_MODULE) {
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printf("SyntaxError?: can't declare nonlocal in outer code\n");
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return;
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}
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bool added;
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id_info_t *id_info = scope_find_or_add_id(scope, qstr, &added);
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if (!added) {
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printf("SyntaxError?: identifier already declared something\n");
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return;
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}
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id_info_t *id_info2 = scope_find_local_in_parent(scope, qstr);
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if (id_info2 == NULL || !(id_info2->kind == ID_INFO_KIND_LOCAL || id_info2->kind == ID_INFO_KIND_CELL || id_info2->kind == ID_INFO_KIND_FREE)) {
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printf("SyntaxError: no binding for nonlocal '%s' found\n", qstr_str(qstr));
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return;
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}
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id_info->kind = ID_INFO_KIND_FREE;
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scope_close_over_in_parents(scope, qstr);
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}
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#if MICROPY_EMIT_CPYTHON
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void scope_print_info(scope_t *s) {
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if (s->kind == SCOPE_MODULE) {
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printf("code <module>\n");
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} else if (s->kind == SCOPE_LAMBDA) {
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printf("code <lambda>\n");
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} else if (s->kind == SCOPE_LIST_COMP) {
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printf("code <listcomp>\n");
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} else if (s->kind == SCOPE_DICT_COMP) {
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printf("code <dictcomp>\n");
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} else if (s->kind == SCOPE_SET_COMP) {
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printf("code <setcomp>\n");
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} else if (s->kind == SCOPE_GEN_EXPR) {
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printf("code <genexpr>\n");
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} else {
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printf("code %s\n", qstr_str(s->simple_name));
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}
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/*
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printf("var global:");
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].kind == ID_INFO_KIND_GLOBAL_EXPLICIT) {
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printf(" %s", qstr_str(s->id_info[i].qstr));
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}
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}
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printf("\n");
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printf("var name:");
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].kind == ID_INFO_KIND_GLOBAL_IMPLICIT) {
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printf(" %s", qstr_str(s->id_info[i].qstr));
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}
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}
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printf("\n");
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printf("var local:");
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].kind == ID_INFO_KIND_LOCAL) {
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printf(" %s", qstr_str(s->id_info[i].qstr));
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}
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}
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printf("\n");
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printf("var free:");
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for (int i = 0; i < s->id_info_len; i++) {
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if (s->id_info[i].kind == ID_INFO_KIND_FREE) {
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printf(" %s", qstr_str(s->id_info[i].qstr));
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}
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}
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printf("\n");
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*/
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printf(" flags %04x\n", s->scope_flags);
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printf(" argcount %d\n", s->num_pos_args);
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printf(" nlocals %d\n", s->num_locals);
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printf(" stacksize %d\n", s->stack_size);
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}
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#endif
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