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

    40

    41

    42

    43

#include "stage4.hh"

    44

    45

    46

    47

    48

    49

    50

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

    51

  this->indent_level = indent_level;

    52

  this->indent_spaces = "";

    53

}

    54

    55

stage4out_c::~stage4out_c(void) {}

    56

    57

    58

void stage4out_c::indent_right(void) {

    59

  indent_spaces+=indent_level;

    60

}

    61

    62

void stage4out_c::indent_left(void) {

    63

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

    64

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

    65

  else

    66

    indent_spaces.erase();

    67

}

    68

    69

    70

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

    71

  std::cout << str;

    72

  return NULL;

    73

}

    74

    75

    76

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

    77

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

    78

    std::cout << (unsigned char)toupper(str[i]);

    79

  return NULL;

    80

}

    81

    91

    92

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

    93

  std::cout << str;

    94

  return NULL;

    95

}

    96

    97

    98

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

    99

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

   100

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

   101

   */

   102

#if 0

   103

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

   104

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

   105

    std::cout << (unsigned char)toupper(*p);

   106

#else

   107

  /* Or more simply... */

   108

    printupper(str.c_str());

   109

#endif

   110

  return NULL;

   111

}

   115

   116

   117

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

   118

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

   119

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

   120

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

   121

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

   122

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

   123

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

   124

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

   125

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

   126

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

   127

   128

   129

   130

/* forward declarations... */

   131

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

   132

visitor_c *new_code_generator(stage4out_c *s4o);

   133

void delete_code_generator(visitor_c *code_generator);

   134

   135

   136

int stage4(symbol_c *tree_root) {

   137

  stage4out_c s4o;

   138

  visitor_c *generate_code = new_code_generator(&s4o);

   139

   140

  if (NULL == generate_code)

   141

    return -1;

   142

   143

  tree_root->accept(*generate_code);

   144

   145

  delete_code_generator(generate_code);

   146

   147

  return 0;

   148

}

   149