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/*

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

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

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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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 * Some classes to help with debuging.

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 *

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

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 */

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

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

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 */

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#include <unistd.h>

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

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#include "absyntax_utils.hh"

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#include "../absyntax/visitor.hh"

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/*********************************/

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/* Class to print a symbol       */

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/*********************************/

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class print_symbol_c: public fcall_visitor_c { 

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  public:

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    static void print(symbol_c *symbol);

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  protected:

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    void fcall(symbol_c *symbol);  

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    /* AST symbols with extra data have their own specialised methods for printing that data */

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    void *visit(il_instruction_c *symbol);

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  private:

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    static print_symbol_c *singleton;

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    void dump_symbol(symbol_c* symbol);

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};

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print_symbol_c *print_symbol_c::singleton = NULL;

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void print_symbol_c::print(symbol_c* symbol) {

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

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  if (NULL == singleton)   ERROR;

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  symbol->accept(*singleton);

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}

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void print_symbol_c::fcall(symbol_c* symbol) {

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  dump_symbol(symbol);

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  fprintf(stderr, "\n");

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}

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void print_symbol_c::dump_symbol(symbol_c* symbol) {

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

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  fprintf(stderr, "  datatype=");

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  if (NULL == symbol->datatype)

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

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  else {

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	  fprintf(stderr, "%s", symbol->datatype->absyntax_cname());

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  }

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

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

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

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

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

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

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

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      else

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

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  } else {

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    fprintf(stderr, "(%lu)\t\t\t\t\t", (unsigned long int)symbol->candidate_datatypes.size());

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  }

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  fprintf(stderr, "}\t");         

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  /* print the const values... */

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  fprintf(stderr, " constv{f=%f, i=%"PRId64", u=%"PRIu64", b=%d}\t", symbol->const_value._real64.value, symbol->const_value._int64.value, symbol->const_value._uint64.value, symbol->const_value._bool.value?1:0);

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}

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

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   dump_symbol(symbol);

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   /* NOTE: std::map.size() returns a size_type, whose type is dependent on compiler/platform. To be portable, we need to do an explicit type cast. */

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  fprintf(stderr, "  next_il_=%lu ", (unsigned long int)symbol->next_il_instruction.size());

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  fprintf(stderr, "  prev_il_=%lu ", (unsigned long int)symbol->prev_il_instruction.size());

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

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

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

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    fprintf(stderr, "(NULL,");

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

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

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  else

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    fprintf(stderr, "(    ,");

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

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

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

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    fprintf(stderr, "NULL)");

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

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

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  else 

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    fprintf(stderr, "    )");

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  fprintf(stderr, "\n");

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  return NULL;

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};

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/*********************************/

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/* Class to print an AST         */

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/*********************************/

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class print_ast_c: public fcall_iterator_visitor_c { 

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  public:

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    static void print(symbol_c *symbol);

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    static void print(const char *str);

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  protected:

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    void prefix_fcall(symbol_c *symbol);

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    void suffix_fcall(symbol_c *symbol);  

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  private:

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    static print_ast_c *singleton;    

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};

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print_ast_c *print_ast_c::singleton = NULL;

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void print_ast_c::print(symbol_c* symbol) {

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

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  if (NULL == singleton)   ERROR;

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  symbol->accept(*singleton);

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}

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void print_ast_c::print(const char *str) {

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  fprintf(stderr, "%s", str);

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}

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

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

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/*********************************/

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/* The DEBUG class               */

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/*********************************/

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void debug_c::print(const char *str) {

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  fprintf(stderr, "%s", str);

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}

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void debug_c::print(symbol_c *symbol) {

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  print_symbol_c::print(symbol);

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}

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void debug_c::print_ast(symbol_c *symbol) {

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  print_ast_c::print(symbol);

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}

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