author | Mario de Sousa <msousa@fe.up.pt> |
Fri, 02 Feb 2018 18:31:40 +0000 | |
changeset 1068 | 222879991f44 |
parent 971 | 8aee27d46208 |
permissions | -rw-r--r-- |
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/* |
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* matiec - a compiler for the programming languages defined in IEC 61131-3 |
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* |
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* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt) |
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* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant |
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* |
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* This program is free software: you can redistribute it and/or modify |
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* it under the terms of the GNU General Public License as published by |
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* the Free Software Foundation, either version 3 of the License, or |
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* (at your option) any later version. |
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* |
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* This program is distributed in the hope that it will be useful, |
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* but WITHOUT ANY WARRANTY; without even the implied warranty of |
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the |
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* GNU General Public License for more details. |
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* |
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* You should have received a copy of the GNU General Public License |
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* along with this program. If not, see <http://www.gnu.org/licenses/>. |
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* |
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* |
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* This code is made available on the understanding that it will not be |
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* used in safety-critical situations without a full and competent review. |
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*/ |
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/* |
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* An IEC 61131-3 compiler. |
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* |
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* Based on the |
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* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10) |
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* |
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*/ |
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/* |
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* This file contains the code that calls the stage 1 (lexical anayser) |
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* and stage 2 (syntax parser) during the first pass. |
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*/ |
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#include <string.h> |
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#include <stdlib.h> |
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/* file with declaration of absyntax classes... */ |
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#include "../absyntax/absyntax.hh" |
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#include "../main.hh" |
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#include "stage1_2.hh" |
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#include "iec_bison.hh" |
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#include "stage1_2_priv.hh" |
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#include "create_enumtype_conversion_functions.hh" |
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/******************************************************/ |
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/* whether we are supporting safe extensions */ |
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/* as defined in PLCopen - Technical Committee 5 */ |
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/* Safety Software Technical Specification, */ |
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/* Part 1: Concepts and Function Blocks, */ |
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/* Version 1.0 – Official Release */ |
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/******************************************************/ |
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bool get_opt_safe_extensions() {return runtime_options.safe_extensions;} |
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/************************************/ |
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/* whether to allow nested comments */ |
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/************************************/ |
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bool get_opt_nested_comments() {return runtime_options.nested_comments;} |
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/**************************************************************************/ |
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/* whether to allow REF(), DREF(), REF_TO, NULL and ^ operators/keywords */ |
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/**************************************************************************/ |
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bool get_opt_ref_standard_extensions() {return runtime_options.ref_standard_extensions;} |
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/**********************************************************************************************/ |
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/* whether bison is doing the pre-parsing, where POU bodies and var declarations are ignored! */ |
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/**********************************************************************************************/ |
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static bool preparse_state__ = false; |
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void set_preparse_state(void) {preparse_state__ = true; } |
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void rst_preparse_state(void) {preparse_state__ = false;} |
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bool get_preparse_state(void) {return preparse_state__;} // returns true if bison is in preparse state |
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/****************************************************/ |
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/* Controlling the entry to the body_state in flex. */ |
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/****************************************************/ |
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static int goto_body_state__ = 0; |
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void cmd_goto_body_state(void) {goto_body_state__ = 1;} |
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int get_goto_body_state(void) {return goto_body_state__;} |
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void rst_goto_body_state(void) {goto_body_state__ = 0;} |
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/*************************************************************/ |
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/* Controlling the entry to the sfc_qualifier_state in flex. */ |
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/*************************************************************/ |
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static int goto_sfc_qualifier_state__ = 0; |
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void cmd_goto_sfc_qualifier_state(void) {goto_sfc_qualifier_state__ = 1;} |
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int get_goto_sfc_qualifier_state(void) {return goto_sfc_qualifier_state__;} |
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void rst_goto_sfc_qualifier_state(void) {goto_sfc_qualifier_state__ = 0;} |
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/*************************************************************/ |
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/* Controlling the entry to the sfc_priority_state in flex. */ |
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/*************************************************************/ |
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static int goto_sfc_priority_state__ = 0; |
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void cmd_goto_sfc_priority_state(void) {goto_sfc_priority_state__ = 1;} |
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int get_goto_sfc_priority_state(void) {return goto_sfc_priority_state__;} |
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void rst_goto_sfc_priority_state(void) {goto_sfc_priority_state__ = 0;} |
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/*************************************************************/ |
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/* Controlling the entry to the sfc_qualifier_state in flex. */ |
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/*************************************************************/ |
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static int goto_task_init_state__ = 0; |
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void cmd_goto_task_init_state(void) {goto_task_init_state__ = 1;} |
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int get_goto_task_init_state(void) {return goto_task_init_state__;} |
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void rst_goto_task_init_state(void) {goto_task_init_state__ = 0;} |
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/****************************************************************/ |
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/* Returning to state in flex previously pushed onto the stack. */ |
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/****************************************************************/ |
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static int pop_state__ = 0; |
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void cmd_pop_state(void) {pop_state__ = 1;} |
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int get_pop_state(void) {return pop_state__;} |
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void rst_pop_state(void) {pop_state__ = 0;} |
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/*********************************/ |
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/* The global symbol tables... */ |
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/*********************************/ |
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/* NOTE: only accessed indirectly by the lexical parser (flex) |
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* through the function get_identifier_token() |
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*/ |
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/* A symbol table to store all the library elements */ |
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/* e.g.: <function_name , function_decl> |
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* <fb_name , fb_decl> |
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* <type_name , type_decl> |
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* <program_name , program_decl> |
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* <configuration_name , configuration_decl> |
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*/ |
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/* static */ library_element_symtable_t library_element_symtable; |
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|
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/* A symbol table to store the declared variables of |
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* the function currently being parsed... |
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*/ |
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/* static */ variable_name_symtable_t variable_name_symtable; |
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|
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/* A symbol table to store the declared direct variables of |
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* the function currently being parsed... |
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*/ |
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/* static */ direct_variable_symtable_t direct_variable_symtable; |
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|
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/* Function only called from within flex! |
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* |
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* search for a symbol in either of the two symbol tables |
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* declared above, and return the token id of the first |
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* symbol found. |
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* Searches first in the variables, and only if not found |
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* does it continue searching in the library elements |
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*/ |
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int get_identifier_token(const char *identifier_str) { |
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// std::cout << "get_identifier_token(" << identifier_str << "): \n"; |
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variable_name_symtable_t ::iterator iter1; |
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library_element_symtable_t::iterator iter2; |
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|
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if ((iter1 = variable_name_symtable.find(identifier_str)) != variable_name_symtable.end()) |
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return iter1->second; |
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|
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if ((iter2 = library_element_symtable.find(identifier_str)) != library_element_symtable.end()) |
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return iter2->second; |
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|
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return identifier_token; |
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} |
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|
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/* Function only called from within flex! |
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* |
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* search for a symbol in direct variables symbol table |
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* declared above, and return the token id of the first |
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* symbol found. |
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*/ |
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int get_direct_variable_token(const char *direct_variable_str) { |
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direct_variable_symtable_t::iterator iter; |
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|
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if ((iter = direct_variable_symtable.find(direct_variable_str)) != direct_variable_symtable.end()) |
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return iter->second; |
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|
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return direct_variable_token; |
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} |
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|
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/************************/ |
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/* Utility Functions... */ |
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/************************/ |
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|
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/* |
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* Join two strings together. Allocate space with malloc(3). |
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*/ |
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char *strdup2(const char *a, const char *b) { |
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char *res = (char *)malloc(strlen(a) + strlen(b) + 1); |
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|
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if (!res) |
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return NULL; |
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return strcat(strcpy(res, a), b); /* safe, actually */ |
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} |
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|
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/* |
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* Join three strings together. Allocate space with malloc(3). |
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*/ |
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char *strdup3(const char *a, const char *b, const char *c) { |
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char *res = (char *)malloc(strlen(a) + strlen(b) + strlen(c) + 1); |
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|
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if (!res) |
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return NULL; |
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return strcat(strcat(strcpy(res, a), b), c); /* safe, actually */ |
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} |
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|
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|
136 | 221 |
|
222 |
/***********************************************************************/ |
|
223 |
/***********************************************************************/ |
|
224 |
/***********************************************************************/ |
|
225 |
/***********************************************************************/ |
|
226 |
/***********************************************************************/ |
|
227 |
/***********************************************************************/ |
|
228 |
/***********************************************************************/ |
|
229 |
/***********************************************************************/ |
|
230 |
/***********************************************************************/ |
|
231 |
/***********************************************************************/ |
|
232 |
||
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int stage2__(const char *filename, |
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symbol_c **tree_root_ref |
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); |
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|
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int stage1_2(const char *filename, symbol_c **tree_root_ref) { |
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/* NOTE: we only call stage2 (bison - syntax analysis) directly, as stage 2 will itself call stage1 (flex - lexical analysis) |
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* automatically as needed |
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*/ |
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|
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/* NOTE: Since we do not call stage1__ (flex) directly, we cannot directly pass any parameters to that function either. |
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* In this case, we use callback functions, i.e. stage1__ (i.e. flex) will call functions defined in this file |
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* whenever it needs info/parameters coming from stage1_2(). |
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* These callback functions will get their data from local (to this file) global variables... |
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* We now set those variables... |
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*/ |
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return stage2__(filename, tree_root_ref); |
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} |
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251 |