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"

    47 

    48 

    49 

    50 

    51 

    52 

    53 

    54 

    55 

    56 

    57 

    58 

    59 print_symbol_c *print_symbol_c::singleton = NULL;

    60 

    61 

    62 void print_symbol_c::print(symbol_c* symbol) {

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

    64   if (NULL == singleton)   ERROR;

    65 

    66   symbol->accept(*singleton);

    67 }

    68 

    69 

    70 

    71 

    72 

    73 

    74 

    75 

    76 void print_symbol_c::fcall(symbol_c* symbol) {

    77   dump_symbol(symbol);

    78   fprintf(stderr, "\n");

    79 }

    80 

    81 

    82 void print_symbol_c::dump_symbol(symbol_c* symbol) {

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

    84 

    85   fprintf(stderr, "  datatype=");

    86   if (NULL == symbol->datatype)

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

    88   else 

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

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

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

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

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

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

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

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

    97       else

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

    99   } else {

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

   101   }

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

   103 }

   104 

   105 

   106 

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

   108    dump_symbol(symbol);

   109 

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

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

   112   

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

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

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

   116     fprintf(stderr, "(NULL,");

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

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

   119   else

   120     fprintf(stderr, "(    ,");

   121   

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

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

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

   125     fprintf(stderr, "NULL)");

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

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

   128   else 

   129     fprintf(stderr, "    )");

   130   

   131   fprintf(stderr, "\n");

   132   

   133   return NULL;

   134 };

   135 

   136 

   137 

   138 

   139 

   140 

   141 

   142 

   143 

   144 

   145 

   146 

   147 

   148 print_ast_c *print_ast_c::singleton = NULL;

   149 

   150 

   151 void print_ast_c::print(symbol_c* symbol) {

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

   153   if (NULL == singleton)   ERROR;

   154 

   155   symbol->accept(*singleton);

   156 }

   157 

   158   

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

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

   161   

   162 

   163 

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