/*
 * (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)
 *
 */


/*
 * This file contains the code that stores the output generated
 * by each specific version of the 4th stage.
 */






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




#include "stage4.hh"






stage4out_c::stage4out_c(std::string indent_level) {
  this->indent_level = indent_level;
  this->indent_spaces = "";
}

stage4out_c::~stage4out_c(void) {}


void stage4out_c::indent_right(void) {
  indent_spaces+=indent_level;
}

void stage4out_c::indent_left(void) {
  if (indent_spaces.length() >= indent_level.length())
    indent_spaces.erase(indent_spaces.length() - indent_level.length(), indent_level.length());
  else
    indent_spaces.erase();
}


void *stage4out_c::print(const char *str) {
  std::cout << str;
  return NULL;
}


void *stage4out_c::printupper(const char *str) {
  for (int i = 0; str[i] != '\0'; i++)
    std::cout << (unsigned char)toupper(str[i]);
  return NULL;
}


void *stage4out_c::print(std::string str) {
  std::cout << str;
  return NULL;
}


void *stage4out_c::printupper(std::string str) {
  /* The string standard class does not have a converter member function to upper case.
   * We have to do it ourselves, a character at a time...
   */
#if 0
  /* The C++ way of doint things... */
  for (string::const_iterator p = str.begin(); p != str.end(); ++p)
    std::cout << (unsigned char)toupper(*p);
#else
  /* Or more simply... */
    printupper(str.c_str());
#endif
  return NULL;
}



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



/* forward declarations... */
/* These functions will be implemented in generate_XXX.cc */
visitor_c *new_code_generator(stage4out_c *s4o);
void delete_code_generator(visitor_c *code_generator);


int stage4(symbol_c *tree_root) {
  stage4out_c s4o;
  visitor_c *generate_code = new_code_generator(&s4o);

  if (NULL == generate_code)
    return -1;

  tree_root->accept(*generate_code);

  delete_code_generator(generate_code);

  return 0;
}