/*
 * (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 <fstream>


#include "stage4.hh"






stage4out_c::stage4out_c(std::string indent_level):
	m_file(NULL) {
  out = &std::cout;
  this->indent_level = indent_level;
  this->indent_spaces = "";
}

stage4out_c::stage4out_c(const char *dir, const char *radix, const char *extension, std::string indent_level) {	
  std::string filename(radix);
  filename += ".";
  filename += extension;
  std::string filepath("");
  if (dir != NULL) {
    filepath += dir;
    filepath += "/";
  }
  filepath += filename;
  std::fstream *file = new std::fstream(filepath.c_str(), std::fstream::out);
  if(file->fail()){
    std::cerr << "Cannot open " << filename << " for write access \n";
    exit(EXIT_FAILURE);
  }else{
    std::cout << filename << "\n";
  }
  out = file;
  m_file = file;
  this->indent_level = indent_level;
  this->indent_spaces = "";
}

stage4out_c::~stage4out_c(void) {
  if(m_file)
  {
    m_file->close();
    delete m_file;
  }
}


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) {
  *out << str;
  return NULL;
}

void *stage4out_c::print_integer(int integer) {
  *out << integer;
  return NULL;
}

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

void *stage4out_c::printlocation(const char *str) {
  *out << "__";
  for (int i = 0; str[i] != '\0'; i++)
    if(str[i] == '.')
      *out << '_';
    else
      *out << (unsigned char)toupper(str[i]);
  return NULL;
}

void *stage4out_c::print(std::string str) {
  *out << 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)
    *out << (unsigned char)toupper(*p);
#else
  /* Or more simply... */
    printupper(str.c_str());
#endif
  return NULL;
}
void *stage4out_c::printlocation(std::string str) {
  return printlocation(str.c_str());
}


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



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


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

  if (NULL == generate_code)
    return -1;

  tree_root->accept(*generate_code);

  delete_code_generator(generate_code);

  return 0;
}