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 

    82 

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

    84   std::cout << str;

    85   return NULL;

    86 }

    87 

    88 

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

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

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

    92    */

    93 #if 0

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

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

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

    97 #else

    98   /* Or more simply... */

    99     printupper(str.c_str());

   100 #endif

   101   return NULL;

   102 }

   103 

   104 

   105 

   106 /***********************************************************************/

   107 /***********************************************************************/

   108 /***********************************************************************/

   109 /***********************************************************************/

   110 /***********************************************************************/

   111 /***********************************************************************/

   112 /***********************************************************************/

   113 /***********************************************************************/

   114 /***********************************************************************/

   115 /***********************************************************************/

   116 

   117 

   118 

   119 /* forward declarations... */

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

   121 visitor_c *new_code_generator(stage4out_c *s4o);

   122 void delete_code_generator(visitor_c *code_generator);

   123 

   124 

   125 int stage4(symbol_c *tree_root) {

   126   stage4out_c s4o;

   127   visitor_c *generate_code = new_code_generator(&s4o);

   128 

   129   if (NULL == generate_code)

   130     return -1;

   131 

   132   tree_root->accept(*generate_code);

   133 

   134   delete_code_generator(generate_code);

   135 

   136   return 0;

   137 }

   138