1

/*

     2

 *  matiec - a compiler for the programming languages defined in IEC 61131-3

     3

 *  Copyright (C) 2012  Mario de Sousa (msousa@fe.up.pt)

     4

 *

     5

 *  This program is free software: you can redistribute it and/or modify

     6

 *  it under the terms of the GNU General Public License as published by

     7

 *  the Free Software Foundation, either version 3 of the License, or

     8

 *  (at your option) any later version.

     9

 *

    10

 *  This program is distributed in the hope that it will be useful,

    11

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    12

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    13

 *  GNU General Public License for more details.

    14

 *

    15

 *  You should have received a copy of the GNU General Public License

    16

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

    17

 *

    18

 *

    19

 * This code is made available on the understanding that it will not be

    20

 * used in safety-critical situations without a full and competent review.

    21

 */

    22

    23

/*

    24

 * An IEC 61131-3 compiler.

    25

 *

    26

 * Based on the

    27

 * FINAL DRAFT - IEC 61131-3, 2nd Ed. (2001-12-10)

    28

 *

    29

 */

    30

    31

    32

/*

    33

 * Some classes to help with debuging.

    34

 *

    35

 * These classes will print out the current state of a symbol or a portion of the Abstract Syntax Tree.

    36

 */

    37

    38

/* TODO: Use a class similar to stage4out_c so that we can have nice indentation when printing an AST

    39

 *       Create a template so that we can TRACE the execution of other visitor classes doing usefull work!

    40

 */

    41

    42

    43

    44

#include <unistd.h>

    45

#include <stdio.h>  /* required for NULL */

    46

#include "absyntax_utils.hh"

    73

    74

    75

    76

    77

print_symbol_c *print_symbol_c::singleton = NULL;

    78

    79

    80

void print_symbol_c::print(symbol_c* symbol) {

    81

  if (NULL == singleton)   singleton = new print_symbol_c();

    82

  if (NULL == singleton)   ERROR;

    83

    84

  symbol->accept(*singleton);

    85

}

    86

    87

    88

    89

    90

    91

void print_symbol_c::fcall(symbol_c* symbol) {

    92

  dump_symbol(symbol);

    93

  fprintf(stderr, "\n");

    94

}

    95

    96

    97

void print_symbol_c::dump_symbol(symbol_c* symbol) {

    98

  fprintf(stderr, "(%03d:%03d..%03d:%03d) \t%s\t", symbol->first_line, symbol->first_column, symbol->last_line, symbol->last_column, symbol->absyntax_cname());

    99

   100

  fprintf(stderr, "  datatype=");

   101

  if (NULL == symbol->datatype)

   102

    fprintf(stderr, "NULL\t\t");

   103

  else 

   104

    fprintf(stderr, symbol->datatype->absyntax_cname());

   105

  fprintf(stderr, "\t<-{");

   106

  if (symbol->candidate_datatypes.size() == 0) {

   107

    fprintf(stderr, "\t\t\t\t\t");

   108

  } else if (symbol->candidate_datatypes.size() <= 2) {

   109

    for (unsigned int i = 0; i < 2; i++)

   110

      if (i < symbol->candidate_datatypes.size())

   111

        fprintf(stderr, " %s,", symbol->candidate_datatypes[i]->absyntax_cname());

   112

      else

   113

        fprintf(stderr, "\t\t\t");

   114

  } else {

   115

    fprintf(stderr, "(%d)\t\t\t\t\t", symbol->candidate_datatypes.size());

   116

  }

   117

  fprintf(stderr, "}\t");          

   118

}

   119

   120

   121

   122

void *print_symbol_c::visit(il_instruction_c *symbol) {

   123

   dump_symbol(symbol);

   124

   125

  fprintf(stderr, "  next_il_=%d ", symbol->next_il_instruction.size());

   126

  fprintf(stderr, "  prev_il_=%d ", symbol->prev_il_instruction.size());

   127

   128

  if (symbol->prev_il_instruction.size() == 0)

   129

    fprintf(stderr, "(----,");

   130

  else if (symbol->prev_il_instruction[0]->datatype == NULL)

   131

    fprintf(stderr, "(NULL,");

   132

  else if (!get_datatype_info_c::is_type_valid(symbol->prev_il_instruction[0]->datatype))

   133

    fprintf(stderr, "(****,");

   134

  else

   135

    fprintf(stderr, "(    ,");

   136

   137

  if (symbol->next_il_instruction.size() == 0)

   138

    fprintf(stderr, "----)");

   139

  else if (symbol->next_il_instruction[0]->datatype == NULL)

   140

    fprintf(stderr, "NULL)");

   141

  else if (!get_datatype_info_c::is_type_valid(symbol->next_il_instruction[0]->datatype))

   142

    fprintf(stderr, "****)");

   143

  else 

   144

    fprintf(stderr, "    )");

   145

   146

  fprintf(stderr, "\n");

   147

   148

  return NULL;

   149

};

   150

   151

   152

   153

   154

   171

   172

   173

   174

   175

print_ast_c *print_ast_c::singleton = NULL;

   176

   177

   178

void print_ast_c::print(symbol_c* symbol) {

   179

  if (NULL == singleton)   singleton = new print_ast_c();

   180

  if (NULL == singleton)   ERROR;

   181

   182

  symbol->accept(*singleton);

   183

}

   184

   190

   191

void print_ast_c::prefix_fcall(symbol_c* symbol) {print_symbol_c::print(symbol);}

   192

void print_ast_c::suffix_fcall(symbol_c* symbol) {}

   193

   194

   195

   196

   197