--- a/stage4/generate_cc/generate_cc_base.cc Tue Oct 23 10:35:58 2007 +0200
+++ /dev/null Thu Jan 01 00:00:00 1970 +0000
@@ -1,668 +0,0 @@
-/*
- * (c) 2003 Mario de Sousa
- *
- * Offered to the public under the terms of the GNU General Public License
- * as published by the Free Software Foundation; either version 2 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.
- *
- * 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 IL and ST compiler.
- *
- * Based on the
- * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)
- *
- */
-
-
-/*
- * Conversion of basic abstract syntax constructs.
- *
- * This is part of the 4th stage that generates
- * a c++ source program equivalent to the IL and ST
- * code.
- */
-
-
-
-
-
-
-//#include <stdio.h> /* required for NULL */
-//#include <string>
-//#include <iostream>
-
-//#include "../../util/symtable.hh"
-
-//#include "generate_cc.hh"
-
-
-
-
-
-
-
-
-
-
-
-
-
-class generate_cc_base_c: public iterator_visitor_c {
-
- protected:
- stage4out_c &s4o;
-
- private:
- /* Unlike programs that are mapped onto C++ classes, Function Blocks are mapped onto a data structure type
- * and a separate function conatining the code. This function is passed a pointer to an instance of the data
- * structure. This means that the code inside the functions must insert a pointer to the data structure whenever
- * it wishes to access a Function Block variable.
- * The variable_prefix_ variable will contain the correct string which needs to be prefixed to all variable accesses.
- * This string is set with the set_variable_prefix() member function.
- */
- const char *variable_prefix_;
-
-
-
- public:
- generate_cc_base_c(stage4out_c *s4o_ptr): s4o(*s4o_ptr) {variable_prefix_ = NULL;}
- ~generate_cc_base_c(void) {}
-
- void set_variable_prefix(const char *variable_prefix) {variable_prefix_ = variable_prefix;}
- void print_variable_prefix(void) {
- if (variable_prefix_ != NULL)
- s4o.print(variable_prefix_);
- }
-
- void *print_token(token_c *token, int offset = 0) {
- return s4o.printupper((token->value)+offset);
- }
-
- void *print_literal(symbol_c *type, symbol_c *value) {
- s4o.print("__");
- type->accept(*this);
- s4o.print("_LITERAL(");
- value->accept(*this);
- s4o.print(")");
- return NULL;
- }
-
- void *print_striped_token(token_c *token, int offset = 0) {
- std::string str = "";
- for (unsigned int i = offset; i < strlen(token->value); i++)
- if (token->value[i] != '_')
- str += token->value[i];
- return s4o.printupper(str);
- }
-
- void *print_striped_binary_token(token_c *token, unsigned int offset = 0) {
- /* convert the binary value to hexadecimal format... */
- unsigned char value, bit_mult;
- unsigned int i;
- int total_bits;
- char str[2] = {'A', '\0'}; /* since the s4o object is not prepared to print out one character at a time... */
-
- s4o.print("0x");
-
- total_bits = 0;
- for (i = offset; i < strlen(token->value); i++)
- if (token->value[i] != '_')
- total_bits++;
-
- value = 0;
- bit_mult = (unsigned char)1 << (((total_bits+3)%4)+1);
- for (i = offset; i < strlen(token->value); i++) {
- if (token->value[i] != '_') {
- bit_mult /= 2;
- value += bit_mult * ((token->value[i] == '0')? 0:1);
- if (bit_mult == 1) {
- str[0] = (value <= 9)? (char)'0' + value : (char)'A' + value;
- s4o.print(str);
- bit_mult = 0x10;
- value = 0;
- }
- }
- }
-
- return NULL;
- }
-
- void *print_list(list_c *list,
- std::string pre_elem_str = "",
- std::string inter_elem_str = "",
- std::string post_elem_str = "",
- visitor_c *visitor = NULL) {
- if (visitor == NULL) visitor = this;
-
- if (list->n > 0) {
-//std::cout << "generate_cc_base_c::print_list(n = " << list->n << ") 000\n";
- s4o.print(pre_elem_str);
- list->elements[0]->accept(*visitor);
- }
-
- for(int i = 1; i < list->n; i++) {
-//std::cout << "generate_cc_base_c::print_list " << i << "\n";
- s4o.print(inter_elem_str);
- list->elements[i]->accept(*visitor);
- }
-
- if (list->n > 0)
- s4o.print(post_elem_str);
-
- return NULL;
- }
-
-
- void *print_binary_expression(symbol_c *l_exp,
- symbol_c *r_exp,
- const char *operation) {
- s4o.print("(");
- l_exp->accept(*this);
- s4o.print(operation);
- r_exp->accept(*this);
- s4o.print(")");
- return NULL;
- }
-
- void *print_unary_expression(symbol_c *exp,
- const char *operation) {
- s4o.print(operation);
- s4o.print("(");
- exp->accept(*this);
- s4o.print(")");
- return NULL;
- }
-
- void *print_binary_function(const char *function,
- symbol_c *l_exp,
- symbol_c *r_exp) {
- s4o.print(function);
- s4o.print("(");
- l_exp->accept(*this);
- s4o.print(", ");
- r_exp->accept(*this);
- s4o.print(")");
- return NULL;
- }
-
- void *print_compare_function(const char *function,
- symbol_c *compare_type,
- symbol_c *l_exp,
- symbol_c *r_exp) {
- s4o.print(function);
- compare_type->accept(*this);
- s4o.print("(2, ");
- l_exp->accept(*this);
- s4o.print(", ");
- r_exp->accept(*this);
- s4o.print(")");
- return NULL;
- }
-
-/***************************/
-/* 2.1.6 - Pragmas */
-/***************************/
- /* Do not use print_token() as it will change everything into uppercase */
- void *visit(pragma_c *symbol) {return s4o.print(symbol->value);}
-
-
-/***************************/
-/* B 0 - Programming Model */
-/***************************/
- /* leave for derived classes... */
-
-
-
-/*************************/
-/* B.1 - Common elements */
-/*************************/
-/*******************************************/
-/* B 1.1 - Letters, digits and identifiers */
-/*******************************************/
- void *visit(identifier_c *symbol) {return print_token(symbol);}
-
-/*********************/
-/* B 1.2 - Constants */
-/*********************/
- /* originally empty... */
-
-/******************************/
-/* B 1.2.1 - Numeric Literals */
-/******************************/
- void *visit(real_c *symbol) {return print_striped_token(symbol);}
- void *visit(integer_c *symbol) {return print_striped_token(symbol);}
- void *visit(binary_integer_c *symbol) {return print_striped_binary_token(symbol, 2);}
- void *visit(octal_integer_c *symbol) {s4o.print("0"); return print_striped_token(symbol, 2);}
- void *visit(hex_integer_c *symbol) {s4o.print("0x"); return print_striped_token(symbol, 3);}
-
- void *visit(numeric_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
- void *visit(integer_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
- void *visit(real_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
- void *visit(bit_string_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
- void *visit(boolean_literal_c *symbol) {return print_literal(symbol->type, symbol->value);}
-
- /* helper class for boolean_literal_c */
- void *visit(boolean_true_c *symbol) {s4o.print("TRUE"); return NULL;}
- void *visit(boolean_false_c *symbol) {s4o.print("FALSE"); return NULL;}
-
-/*******************************/
-/* B.1.2.2 Character Strings */
-/*******************************/
- void *visit(double_byte_character_string_c *symbol) {
- // TO DO ...
- ERROR;
- return print_token(symbol);
- }
-
- void *visit(single_byte_character_string_c *symbol) {
- std::string str = "";
- unsigned int count = 0;
- str += '"';
- /* we ignore the first and last bytes, they will be the character ' */
- for (unsigned int i = 1; i < strlen(symbol->value) - 1; i++) {
- char c = symbol->value[i];
- if ((c == '\\') || (c == '"'))
- {str += '\\'; str += c; count ++; continue;}
- if (c != '$')
- {str += c; count++; continue;}
- /* this should be safe, since the code has passed the syntax parser!! */
- c = symbol->value[++i];
- switch (c) {
- case '$':
- case '\'':
- {str += c; count++; continue;}
- case 'L':
- case 'l':
- {str += "\x0A"; /* LF */; count++; continue;}
- case 'N':
- case 'n':
- {str += "\\x0A"; /* NL */; count++; continue;}
- case 'P':
- case 'p':
- {str += "\\f"; /* FF */; count++; continue;}
- case 'R':
- case 'r':
- {str += "\\r"; /* CR */; count++; continue;}
- case 'T':
- case 't':
- {str += "\\t"; /* tab */; count++; continue;}
- default: {
- if (isxdigit(c)) {
- /* this should be safe, since the code has passed the syntax parser!! */
- char c2 = symbol->value[++i];
- if (isxdigit(c2)) {
- str += '\\'; str += 'x'; str += c; str += c2;
- count++; continue;
- }
- }
- }
- /* otherwise we have an invalid string!! */
- /* This should not have got through the syntax parser! */
- ERROR;
- } /* switch() */
- } /* for() */
-
- str += '"';
- s4o.print("(STRING){");
- s4o.print_integer(count);
- s4o.print(",");
- s4o.print(str);
- s4o.print("}");
- return NULL;
- }
-
-
-/***************************/
-/* B 1.2.3 - Time Literals */
-/***************************/
-
-/************************/
-/* B 1.2.3.1 - Duration */
-/************************/
-/* The following output is actually the parameters to the constructor of the TIME class! */
-
-/* SYM_REF0(neg_time_c) */
-void *visit(neg_time_c *symbol) {s4o.print("-1"); /* negative time value */; return NULL;}
-
-
-/* SYM_REF2(duration_c, neg, interval) */
-void *visit(duration_c *symbol) {
- TRACE("duration_c");
- s4o.print("__time_to_timespec(");
- if (NULL == symbol->neg)
- s4o.print("1"); /* positive time value */
- else
- symbol->neg->accept(*this); /* this will print '-1' :-) */
-
- s4o.print(", ");
-
- symbol->interval->accept(*this);
- if (typeid(*symbol->interval) == typeid(hours_c)) {s4o.print(", 0");}
- if (typeid(*symbol->interval) == typeid(minutes_c)) {s4o.print(", 0, 0");}
- if (typeid(*symbol->interval) == typeid(seconds_c)) {s4o.print(", 0, 0, 0");}
- if (typeid(*symbol->interval) == typeid(milliseconds_c)) {s4o.print(", 0, 0, 0, 0");}
- s4o.print(")");
- return NULL;
-}
-
-
-/* SYM_TOKEN(fixed_point_c) */
-void *visit(fixed_point_c *symbol) {return print_token(symbol);}
-
-
-/* SYM_REF2(days_c, days, hours) */
-void *visit(days_c *symbol) {
- TRACE("days_c");
- if (NULL == symbol->hours)
- s4o.print("0, 0, 0, 0"); /* milliseconds, seconds, minutes, hours */
- else
- symbol->hours->accept(*this);
-
- s4o.print(", ");
-
- symbol->days->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(hours_c, hours, minutes) */
-void *visit(hours_c *symbol) {
- TRACE("hours_c");
- if (NULL == symbol->minutes)
- s4o.print("0, 0, 0"); /* milliseconds, seconds, minutes */
- else
- symbol->minutes->accept(*this);
-
- s4o.print(", ");
-
- symbol->hours->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(minutes_c, minutes, seconds) */
-void *visit(minutes_c *symbol) {
- TRACE("minutes_c");
- if (NULL == symbol->seconds)
- s4o.print("0, 0"); /* milliseconds, seconds */
- else
- symbol->seconds->accept(*this);
-
- s4o.print(", ");
-
- symbol->minutes->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(seconds_c, seconds, milliseconds) */
-void *visit(seconds_c *symbol) {
- TRACE("seconds_c");
- if (NULL == symbol->milliseconds)
- s4o.print("0"); /* milliseconds */
- else
- symbol->milliseconds->accept(*this);
-
- s4o.print(", ");
-
- symbol->seconds->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(milliseconds_c, milliseconds, unused) */
-void *visit(milliseconds_c *symbol) {
- TRACE("milliseconds_c");
- symbol->milliseconds->accept(*this);
- return NULL;
-}
-
-/************************************/
-/* B 1.2.3.2 - Time of day and Date */
-/************************************/
-
-/* SYM_REF2(time_of_day_c, daytime, unused) */
-void *visit(time_of_day_c *symbol) {
- TRACE("time_of_day_c");
- s4o.print("__tod_to_timespec(");
- symbol->daytime->accept(*this);
- s4o.print(")");
- return NULL;
-}
-
-
-/* SYM_REF4(daytime_c, day_hour, day_minute, day_second, unused) */
-void *visit(daytime_c *symbol) {
- TRACE("daytime_c");
- symbol->day_second->accept(*this);
- s4o.print(", ");
- symbol->day_minute->accept(*this);
- s4o.print(", ");
- symbol->day_hour->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(date_c, date_literal, unused) */
-void *visit(date_c *symbol) {
- TRACE("date_c");
- s4o.print("__date_to_timespec(");
- symbol->date_literal->accept(*this);
- s4o.print(")");
- return NULL;
-}
-
-
-/* SYM_REF4(date_literal_c, year, month, day, unused) */
-void *visit(date_literal_c *symbol) {
- TRACE("date_literal_c");
- symbol->day->accept(*this);
- s4o.print(", ");
- symbol->month->accept(*this);
- s4o.print(", ");
- symbol->year->accept(*this);
- return NULL;
-}
-
-
-/* SYM_REF2(date_and_time_c, date_literal, daytime) */
-void *visit(date_and_time_c *symbol) {
- TRACE("date_and_time_c");
- s4o.print("__dt_to_timespec(");
- symbol->daytime->accept(*this);
- s4o.print(", ");
- symbol->date_literal->accept(*this);
- s4o.print(")");
- return NULL;
-}
-
-
-/**********************/
-/* B.1.3 - Data types */
-/**********************/
-/***********************************/
-/* B 1.3.1 - Elementary Data Types */
-/***********************************/
- void *visit(time_type_name_c *symbol) {s4o.print("TIME"); return NULL;}
- void *visit(bool_type_name_c *symbol) {s4o.print("BOOL"); return NULL;}
- void *visit(sint_type_name_c *symbol) {s4o.print("SINT"); return NULL;}
- void *visit(int_type_name_c *symbol) {s4o.print("INT"); return NULL;}
- void *visit(dint_type_name_c *symbol) {s4o.print("DINT"); return NULL;}
- void *visit(lint_type_name_c *symbol) {s4o.print("LINT"); return NULL;}
- void *visit(usint_type_name_c *symbol) {s4o.print("USINT"); return NULL;}
- void *visit(uint_type_name_c *symbol) {s4o.print("UINT"); return NULL;}
- void *visit(udint_type_name_c *symbol) {s4o.print("UDINT"); return NULL;}
- void *visit(ulint_type_name_c *symbol) {s4o.print("ULINT"); return NULL;}
- void *visit(real_type_name_c *symbol) {s4o.print("REAL"); return NULL;}
- void *visit(lreal_type_name_c *symbol) {s4o.print("LREAL"); return NULL;}
- void *visit(date_type_name_c *symbol) {s4o.print("DATE"); return NULL;}
- void *visit(tod_type_name_c *symbol) {s4o.print("TOD"); return NULL;}
- void *visit(dt_type_name_c *symbol) {s4o.print("DT"); return NULL;}
- void *visit(byte_type_name_c *symbol) {s4o.print("BYTE"); return NULL;}
- void *visit(word_type_name_c *symbol) {s4o.print("WORD"); return NULL;}
- void *visit(lword_type_name_c *symbol) {s4o.print("LWORD"); return NULL;}
- void *visit(dword_type_name_c *symbol) {s4o.print("DWORD"); return NULL;}
- void *visit(string_type_name_c *symbol) {s4o.print("STRING"); return NULL;}
- void *visit(wstring_type_name_c *symbol) {s4o.print("WSTRING"); return NULL;}
-
-/********************************/
-/* B.1.3.2 - Generic data types */
-/********************************/
- /* originally empty... */
-
-/********************************/
-/* B 1.3.3 - Derived data types */
-/********************************/
- /* leave for derived classes... */
-
-/*********************/
-/* B 1.4 - Variables */
-/*********************/
-void *visit(symbolic_variable_c *symbol) {
- TRACE("symbolic_variable_c");
- this->print_variable_prefix();
- symbol->var_name->accept(*this);
- return NULL;
-}
-
-/********************************************/
-/* B.1.4.1 Directly Represented Variables */
-/********************************************/
-void *visit(direct_variable_c *symbol) {
- TRACE("direct_variable_c");
- /* Do not use print_token() as it will change everything into uppercase */
- return s4o.printlocation(symbol->value);
-}
-
-
-
-/*************************************/
-/* B.1.4.2 Multi-element Variables */
-/*************************************/
-#if 0
-/* subscripted_variable '[' subscript_list ']' */
-SYM_REF2(array_variable_c, subscripted_variable, subscript_list)
-
-/* subscript_list ',' subscript */
-SYM_LIST(subscript_list_c)
-#endif
-
-/* record_variable '.' field_selector */
-/* WARNING: input and/or output variables of function blocks
- * may be accessed as fields of a structured variable!
- * Code handling a structured_variable_c must take
- * this into account!
- */
-// SYM_REF2(structured_variable_c, record_variable, field_selector)
-void *visit(structured_variable_c *symbol) {
- TRACE("structured_variable_c");
-
- symbol->record_variable->accept(*this);
- s4o.print(".");
- symbol->field_selector->accept(*this);
- return NULL;
-}
-
-/******************************************/
-/* B 1.4.3 - Declaration & Initialisation */
-/******************************************/
- /* leave for derived classes... */
-
-/**************************************/
-/* B.1.5 - Program organization units */
-/**************************************/
-/***********************/
-/* B 1.5.1 - Functions */
-/***********************/
- /* leave for derived classes... */
-
-/*****************************/
-/* B 1.5.2 - Function Blocks */
-/*****************************/
- /* leave for derived classes... */
-
-/**********************/
-/* B 1.5.3 - Programs */
-/**********************/
- /* leave for derived classes... */
-
-/*********************************************/
-/* B.1.6 Sequential function chart elements */
-/*********************************************/
-
-/********************************/
-/* B 1.7 Configuration elements */
-/********************************/
- /* leave for derived classes... */
-
-/****************************************/
-/* B.2 - Language IL (Instruction List) */
-/****************************************/
-/***********************************/
-/* B 2.1 Instructions and Operands */
-/***********************************/
- /* leave for derived classes... */
-
-/*******************/
-/* B 2.2 Operators */
-/*******************/
- /* leave for derived classes... */
-
-
-/***************************************/
-/* B.3 - Language ST (Structured Text) */
-/***************************************/
-/***********************/
-/* B 3.1 - Expressions */
-/***********************/
- /* leave for derived classes... */
-
-/********************/
-/* B 3.2 Statements */
-/********************/
- /* leave for derived classes... */
-
-/*********************************/
-/* B 3.2.1 Assignment Statements */
-/*********************************/
- /* leave for derived classes... */
-
-/*****************************************/
-/* B 3.2.2 Subprogram Control Statements */
-/*****************************************/
- /* leave for derived classes... */
-
-/********************************/
-/* B 3.2.3 Selection Statements */
-/********************************/
- /* leave for derived classes... */
-
-/********************************/
-/* B 3.2.4 Iteration Statements */
-/********************************/
- /* leave for derived classes... */
-
-}; /* class generate_cc_basic_c */
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