revert commits improved performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)
Following commits are reverted:
mjsousa 0b275a2 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- increase hardcoded limit to 499
mjsousa 2228799 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR) -- Add comments!!
mjsousa ce81fa6 improve performance of some extensible Standard Functions (ADD, MUL, AND, OR, XOR)"
The reason is that they cause regression in some cases (if function is
used as argument for function block, for example) and this is not
fixed for a long time.
/*
* matiec - a compiler for the programming languages defined in IEC 61131-3
*
* Copyright (C) 2003-2011 Mario de Sousa (msousa@fe.up.pt)
* Copyright (C) 2007-2011 Laurent Bessard and Edouard Tisserant
*
* This program is free software: you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation, either version 3 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program. If not, see <http://www.gnu.org/licenses/>.
*
*
* This code is made available on the understanding that it will not be
* used in safety-critical situations without a full and competent review.
*/
/*
* An IEC 61131-3 compiler.
*
* Based on the
* FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
*
*/
/*
* The private interface to stage1_2.cc
*/
/* !!! WARNING !!!
*
* Whoever includes this file (stage1_2_priv.hh) will need
* to first inlcude iec_bison.hh !!
*
* Read other comments further down to understand why we don't
* include iec_bison.hh in this file.
*/
/* file with the declarations of symbol tables... */
#include "../util/symtable.hh"
#include "stage1_2.hh"
/*
* This file includes the interface through which the lexical parser (stage 1 - flex)
* and the syntax analyser (stage 2 - bison) interact between themselves.
*
* This is mostly through direct access to shared global variables, however some
* of the global variables will only be accessed through some accessor functions.
*
* This file also includes the interface between the main stage1_2() functions and
* the flex lexical parser.
*
* This file also includes some utility functions (strdupX() ) that are both used
* in the lexical and syntax analysers.
*/
/*************************************************************/
/*************************************************************/
/**** *****/
/**** I n t e r f a c e B e t w e e n *****/
/**** F l e x a n d s t a g e 1 _ 2 () *****/
/**** *****/
/*************************************************************/
/*************************************************************/
/******************************************************/
/* whether we are suporting safe extensions */
/* as defined in PLCopen - Technical Committee 5 */
/* Safety Software Technical Specification, */
/* Part 1: Concepts and Function Blocks, */
/* Version 1.0 – Official Release */
/******************************************************/
bool get_opt_safe_extensions();
/************************************/
/* whether to allow nested comments */
/************************************/
bool get_opt_nested_comments();
/**************************************************************************/
/* whether to allow REF(), DREF(), REF_TO, NULL and ^ operators/keywords */
/**************************************************************************/
bool get_opt_ref_standard_extensions();
/*************************************************************/
/*************************************************************/
/**** *****/
/**** I n t e r f a c e B e t w e e n *****/
/**** F l e x a n d B i s o n *****/
/**** *****/
/*************************************************************/
/*************************************************************/
/*********************************************/
/* print the include file stack to stderr... */
/*********************************************/
/* This is a service that flex provides to bison... */
void print_include_stack(void);
/*****************************************************/
/* Ask flex to include the source code in the string */
/*****************************************************/
/* This is a service that flex provides to bison... */
/* The string should contain valid IEC 61131-3 source code. Bison will ask flex to insert source
* code into the input stream of IEC code being parsed. The code to be inserted is typically
* generated automatically.
* Currently this is used to insert conversion functions ***_TO_*** (as defined by the standard)
* between user defined (i.e. derived) enumerated datatypes, and some basic datatypes
* (e.g. INT, STRING, etc...)
*/
void include_string(const char *source_code);
/**********************************/
/* Tell flex which file to parse. */
/**********************************/
/* This is a service that flex provides to bison... */
/* Tell flex which file to parse. This function will not imediately start parsing the file.
* To parse the file, you then need to call yyparse()
*
* Returns NULL on error opening the file (and a valid errno), or 0 on success.
* Caller must close the file!
*/
FILE *parse_file(const char *filename);
/**********************************************************************************************/
/* whether bison is doing the pre-parsing, where POU bodies and var declarations are ignored! */
/**********************************************************************************************/
void set_preparse_state(void);
void rst_preparse_state(void);
bool get_preparse_state(); // returns true if bison is in preparse state
/****************************************************/
/* Controlling the entry to the body_state in flex. */
/****************************************************/
void cmd_goto_body_state(void);
int get_goto_body_state(void);
void rst_goto_body_state(void);
/*************************************************************/
/* Controlling the entry to the sfc_qualifier_state in flex. */
/*************************************************************/
void cmd_goto_sfc_qualifier_state(void);
int get_goto_sfc_qualifier_state(void);
void rst_goto_sfc_qualifier_state(void);
/*************************************************************/
/* Controlling the entry to the sfc_priority_state in flex. */
/*************************************************************/
void cmd_goto_sfc_priority_state(void);
int get_goto_sfc_priority_state(void);
void rst_goto_sfc_priority_state(void);
/*********************************************************/
/* Controlling the entry to the task_init_state in flex. */
/*********************************************************/
void cmd_goto_task_init_state(void);
int get_goto_task_init_state(void);
void rst_goto_task_init_state(void);
/****************************************************************/
/* Returning to state in flex previously pushed onto the stack. */
/****************************************************************/
void cmd_pop_state(void);
int get_pop_state(void);
void rst_pop_state(void);
/*********************************/
/* The global symbol tables... */
/*********************************/
/* NOTE: only accessed indirectly by the lexical parser (flex)
* through the function get_identifier_token()
*
* Bison accesses these data structures directly.
*
* In essence, they are a data passing mechanism between Bison and Flex.
*/
/* A symbol table to store all the library elements */
/* e.g.: <function_name , function_decl>
* <fb_name , fb_decl>
* <type_name , type_decl>
* <program_name , program_decl>
* <configuration_name , configuration_decl>
*/
typedef symtable_c<int> library_element_symtable_t;
extern library_element_symtable_t library_element_symtable;
/* A symbol table to store the declared variables of
* the function currently being parsed...
*/
typedef symtable_c<int> variable_name_symtable_t;
extern variable_name_symtable_t variable_name_symtable;
/* A symbol table to store the declared direct variables of
* the function currently being parsed...
*/
typedef symtable_c<int> direct_variable_symtable_t;
extern direct_variable_symtable_t direct_variable_symtable;
/* Function only called from within flex!
*
* search for a symbol in either of the two symbol tables
* declared above, and return the token id of the first
* symbol found.
* Searches first in the variables, and only if not found
* does it continue searching in the library elements
*/
int get_identifier_token(const char *identifier_str);
/* Function only called from within flex!
*
* search for a symbol in direct variables symbol table
* declared above, and return the token id of the first
* symbol found.
*/
int get_direct_variable_token(const char *direct_variable_str);
/*************************************************************/
/*************************************************************/
/**** *****/
/**** U t i l i t y F u n c t i o n s ... *****/
/**** *****/
/**** *****/
/*************************************************************/
/*************************************************************/
/* Join two strings together. Allocate space with malloc(3). */
char *strdup2(const char *a, const char *b);
/* Join three strings together. Allocate space with malloc(3). */
char *strdup3(const char *a, const char *b, const char *c);