1

/*

     2

 * (c) 2003 Mario de Sousa

     3

 *

     4

 * Offered to the public under the terms of the GNU General Public License

     5

 * as published by the Free Software Foundation; either version 2 of the

     6

 * License, or (at your option) any later version.

     7

 *

     8

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

     9

 * WITHOUT ANY WARRANTY; without even the implied warranty of

    10

 * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General

    11

 * Public License for more details.

    12

 *

    13

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

    14

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

    15

 */

    16

    17

/*

    18

 * An IEC 61131-3 IL and ST compiler.

    19

 *

    20

 * Based on the

    21

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

    22

 *

    23

 */

    24

    25

    26

/*

    27

 * This file contains the code that stores the output generated

    28

 * by each specific version of the 4th stage.

    29

 */

    30

    31

    32

    33

    34

    35

    36

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

    37

#include <string>

    38

#include <iostream>

    39

#include <fstream>

    40

    41

    42

#include "stage4.hh"

    43

    44

    45

    46

    47

    48

    49

stage4out_c::stage4out_c(std::string indent_level):

    50

	m_file(NULL) {

    51

  out = &std::cout;

    52

  this->indent_level = indent_level;

    53

  this->indent_spaces = "";

    54

}

    55

    56

stage4out_c::stage4out_c(const char *radix, const char *extension, std::string indent_level) {	

    57

  std::string filename(radix);

    58

  filename += ".";

    59

  filename += extension;

    60

  std::fstream *file = new std::fstream(filename.c_str(), std::fstream::out);

    61

  out = file;

    62

  m_file = file;

    63

  this->indent_level = indent_level;

    64

  this->indent_spaces = "";

    65

}

    66

    67

stage4out_c::~stage4out_c(void) {

    68

  if(m_file)

    69

  {

    70

    m_file->close();

    71

    delete m_file;

    72

  }

    73

}

    74

    75

    76

void stage4out_c::indent_right(void) {

    77

  indent_spaces+=indent_level;

    78

}

    79

    80

void stage4out_c::indent_left(void) {

    81

  if (indent_spaces.length() >= indent_level.length())

    82

    indent_spaces.erase(indent_spaces.length() - indent_level.length(), indent_level.length());

    83

  else

    84

    indent_spaces.erase();

    85

}

    86

    87

    88

void *stage4out_c::print(const char *str) {

    89

  *out << str;

    90

  return NULL;

    91

}

    92

    93

void *stage4out_c::print_integer(int integer) {

    94

  *out << integer;

    95

  return NULL;

    96

}

    97

    98

void *stage4out_c::printupper(const char *str) {

    99

  for (int i = 0; str[i] != '\0'; i++)

   100

    *out << (unsigned char)toupper(str[i]);

   101

  return NULL;

   102

}

   103

   104

void *stage4out_c::printlocation(const char *str) {

   105

  *out << "__";

   106

  for (int i = 0; str[i] != '\0'; i++)

   107

    if(str[i] == '.')

   108

      *out << '_';

   109

    else

   110

      *out << (unsigned char)toupper(str[i]);

   111

  return NULL;

   112

}

   113

   114

void *stage4out_c::print(std::string str) {

   115

  *out << str;

   116

  return NULL;

   117

}

   118

   119

   120

void *stage4out_c::printupper(std::string str) {

   121

  /* The string standard class does not have a converter member function to upper case.

   122

   * We have to do it ourselves, a character at a time...

   123

   */

   124

#if 0

   125

  /* The C++ way of doint things... */

   126

  for (string::const_iterator p = str.begin(); p != str.end(); ++p)

   127

    *out << (unsigned char)toupper(*p);

   128

#else

   129

  /* Or more simply... */

   130

    printupper(str.c_str());

   131

#endif

   132

  return NULL;

   133

}

   134

void *stage4out_c::printlocation(std::string str) {

   135

  return printlocation(str.c_str());

   136

}

   137

   138

   139

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

   140

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

   141

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

   142

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

   143

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

   144

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

   145

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

   146

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

   147

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

   148

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

   149

   150

   151

   152

/* forward declarations... */

   153

/* These functions will be implemented in generate_XXX.cc */

   154

visitor_c *new_code_generator(stage4out_c *s4o);

   155

void delete_code_generator(visitor_c *code_generator);

   156

   157

   158

int stage4(symbol_c *tree_root) {

   159

  stage4out_c s4o;

   160

  visitor_c *generate_code = new_code_generator(&s4o);

   161

   162

  if (NULL == generate_code)

   163

    return -1;

   164

   165

  tree_root->accept(*generate_code);

   166

   167

  delete_code_generator(generate_code);

   168

   169

  return 0;

   170

}

   171