1

/*

     2

 *  matiec - a compiler for the programming languages defined in IEC 61131-3

     3

 *

     4

 *  Copyright (C) 2009-2011  Mario de Sousa (msousa@fe.up.pt)

     5

 *  Copyright (C) 2011-2012  Manuele Conti (manuele.conti@sirius-es.it)

     6

 *  Copyright (C) 2011-2012  Matteo Facchinetti (matteo.facchinetti@sirius-es.it)

     7

 *

     8

 *

     9

 *  This program is free software: you can redistribute it and/or modify

    10

 *  it under the terms of the GNU General Public License as published by

    11

 *  the Free Software Foundation, either version 3 of the License, or

    12

 *  (at your option) any later version.

    13

 *

    14

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

    15

 *  but WITHOUT ANY WARRANTY; without even the implied warranty of

    16

 *  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the

    17

 *  GNU General Public License for more details.

    18

 *

    19

 *  You should have received a copy of the GNU General Public License

    20

 *  along with this program.  If not, see <http://www.gnu.org/licenses/>.

    21

 *

    22

 *

    23

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

    24

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

    25

 */

    26

    27

/*

    28

 * An IEC 61131-3 compiler.

    29

 *

    30

 * Based on the

    31

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

    32

 *

    33

 */

    34

    35

/* NOTE: The algorithm implemented here assumes that the symbol_c.candidate_datatype, and the symbol_c.datatype 

    36

 *       annotations have already been apropriately filled in!

    37

 *       BEFORE running this visitor, be sure to CALL the fill_candidate_datatypes_c, and the narrow_candidate_datatypes_c visitors!

    38

 */

    39

    40

    41

/*

    42

 *  By analysing the candidate datatype lists, as well as the chosen datatype for each expression, determine

    43

 *  if an datatype error has been found, and if so, print out an error message.

    44

 */

    45

    46

    47

#include "../absyntax_utils/absyntax_utils.hh"

    48

#include "datatype_functions.hh"

    49

    50

    51

class print_datatypes_error_c: public iterator_visitor_c {

    52

    53

  private:

    54

    /* The level of detail that the user wants us to display error messages. */

    55

//     #define error_level_default (1)

    56

    #define error_level_default (1)

    57

    #define error_level_nagging (4)

    58

    unsigned int current_display_error_level;

    59

    60

    search_varfb_instance_type_c *search_varfb_instance_type;

    61

    /* When calling a function block, we must first find it's type,

    62

     * by searching through the declarations of the variables currently

    63

     * in scope.

    64

     * This class does just that...

    65

     * A new object instance is instantiated whenever we start checking semantics

    66

     * for a function block type declaration, or a program declaration.

    67

     * This object instance will then later be called while the

    68

     * function block's or the program's body is being handled.

    69

     *

    70

     * Note that functions cannot contain calls to function blocks,

    71

     * so we do not create an object instance when handling

    72

     * a function declaration.

    73

     */

    74

    75

    /* In IL code, once we find a type mismatch error, it is best to

    76

     * ignore any further errors until the end of the logical operation,

    77

     * i.e. until the next LD.

    78

     * However, we cannot clear the il_error flag on all LD operations,

    79

     * as these may also be used within parenthesis. LD operations

    80

     * within parenthesis may not clear the error flag.

    81

     * We therefore need a counter to know how deep inside a parenthesis

    82

     * structure we are.

    83

     */

    84

    int  il_parenthesis_level;

    85

    bool il_error;

    86

    int  error_count;

    87

    bool warning_found;

    88

    89

    /* the current data type of the data stored in the IL stack, i.e. the default variable */

    90

    il_instruction_c *fake_prev_il_instruction;

    91

    /* the narrow algorithm will need access to the intersected candidate_datatype lists of all prev_il_instructions, as well as the 

    92

     * list of the prev_il_instructions.

    93

     * Instead of creating two 'global' (within the class) variables, we create a single il_instruction_c variable (fake_prev_il_instruction),

    94

     * and shove that data into this single variable.

    95

     */

    96

    symbol_c *il_operand_type;

    97

    symbol_c *il_operand;

    98

    99

    /* some helper functions... */

   100

    void handle_function_invocation(symbol_c *fcall, generic_function_call_t fcall_data);

   101

    void *handle_implicit_il_fb_invocation(const char *param_name, symbol_c *il_operator, symbol_c *called_fb_declaration);  

   102

    void *handle_conditional_flow_control_IL_instruction(symbol_c *symbol, const char *oper);

   103

   104

    void *print_binary_operator_errors  (const char *il_operator, symbol_c *symbol,                                     bool deprecated_operation = false);

   105

    void *print_binary_expression_errors(const char *operation  , symbol_c *symbol, symbol_c *l_expr, symbol_c *r_expr, bool deprecated_operation = false);

   106

   107

   108

  public:

   109

    print_datatypes_error_c(symbol_c *ignore);

   110

    virtual ~print_datatypes_error_c(void);

   111

    int get_error_count();

   112

   113

   114

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

   115

    /* B 1.2 - Constants */

   116

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

   117

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

   118

    /* B 1.2.1 - Numeric Literals */

   119

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

   120

    void *visit(real_c *symbol);

   121

    void *visit(integer_c *symbol);

   122

    void *visit(neg_real_c *symbol);

   123

    void *visit(neg_integer_c *symbol);

   124

    void *visit(binary_integer_c *symbol);

   125

    void *visit(octal_integer_c *symbol);

   126

    void *visit(hex_integer_c *symbol);

   127

    void *visit(integer_literal_c *symbol);

   128

    void *visit(real_literal_c *symbol);

   129

    void *visit(bit_string_literal_c *symbol);

   130

    void *visit(boolean_literal_c *symbol);

   131

    void *visit(boolean_true_c *symbol);

   132

    void *visit(boolean_false_c *symbol);

   133

   134

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

   135

    /* B.1.2.2   Character Strings */

   136

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

   137

    void *visit(double_byte_character_string_c *symbol);

   138

    void *visit(single_byte_character_string_c *symbol);

   139

   140

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

   141

    /* B 1.2.3 - Time Literals */

   142

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

   143

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

   144

    /* B 1.2.3.1 - Duration */

   145

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

   146

    void *visit(duration_c *symbol);

   147

   148

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

   149

    /* B 1.2.3.2 - Time of day and Date */

   150

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

   151

    void *visit(time_of_day_c *symbol);

   152

    void *visit(date_c *symbol);

   153

    void *visit(date_and_time_c *symbol);

   154

   155

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

   156

    /* B 1.3 - Data types */

   157

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

   158

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

   159

    /* B 1.3.3 - Derived data types */

   160

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

   161

    void *visit(simple_spec_init_c *symbol);

   162

//  void *visit(data_type_declaration_c *symbol); /* use base iterator_c method! */

   163

    void *visit(enumerated_value_c *symbol);

   164

   165

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

   166

    /* B 1.4 - Variables */

   167

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

   168

    void *visit(symbolic_variable_c *symbol);

   169

   170

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

   171

    /* B 1.4.1 - Directly Represented Variables */

   172

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

   173

    void *visit(direct_variable_c *symbol);

   174

   175

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

   176

    /* B 1.4.2 - Multi-element variables */

   177

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

   178

    void *visit(array_variable_c *symbol);

   179

    void *visit(subscript_list_c *symbol);

   180

    void *visit(structured_variable_c *symbol);

   181

   182

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

   183

    /* B 1.4.3 - Declaration & Initialisation */

   184

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

   185

    void *visit(location_c *symbol);

   186

    void *visit(located_var_decl_c *symbol);

   187

   188

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

   189

    /* B 1.5 - Program organization units */

   190

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

   191

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

   192

    /* B 1.5.1 - Functions */

   193

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

   194

    void *visit(function_declaration_c *symbol);

   195

   196

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

   197

    /* B 1.5.2 - Function blocks */

   198

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

   199

    void *visit(function_block_declaration_c *symbol);

   200

   201

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

   202

    /* B 1.5.3 - Programs */

   203

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

   204

    void *visit(program_declaration_c *symbol);

   205

   206

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

   207

    /* B 1.6 Sequential function chart elements */

   208

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

   209

    void *visit(transition_condition_c *symbol);

   210

   211

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

   212

    /* B 1.7 Configuration elements */

   213

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

   214

    void *visit(configuration_declaration_c *symbol);

   215

   216

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

   217

    /* B.2 - Language IL (Instruction List) */

   218

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

   219

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

   220

    /* B 2.1 Instructions and Operands */

   221

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

   222

//  void *visit(instruction_list_c *symbol);

   223

    void *visit(il_instruction_c *symbol);

   224

    void *visit(il_simple_operation_c *symbol);

   225

    void *visit(il_function_call_c *symbol);

   226

    void *visit(il_expression_c *symbol);

   227

    void *visit(il_fb_call_c *symbol);

   228

    void *visit(il_formal_funct_call_c *symbol);

   229

//  void *visit(il_operand_list_c *symbol);

   230

//  void *visit(simple_instr_list_c *symbol);

   231

    void *visit(il_simple_instruction_c*symbol);

   232

//  void *visit(il_param_list_c *symbol);

   233

//  void *visit(il_param_assignment_c *symbol);

   234

//  void *visit(il_param_out_assignment_c *symbol);

   235

   236

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

   237

    /* B 2.2 Operators */

   238

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

   239

    void *visit(LD_operator_c *symbol);

   240

    void *visit(LDN_operator_c *symbol);

   241

    void *visit(ST_operator_c *symbol);

   242

    void *visit(STN_operator_c *symbol);

   243

    void *visit(NOT_operator_c *symbol);

   244

    void *visit(S_operator_c *symbol);

   245

    void *visit(R_operator_c *symbol);

   246

    void *visit(S1_operator_c *symbol);

   247

    void *visit(R1_operator_c *symbol);

   248

    void *visit(CLK_operator_c *symbol);

   249

    void *visit(CU_operator_c *symbol);

   250

    void *visit(CD_operator_c *symbol);

   251

    void *visit(PV_operator_c *symbol);

   252

    void *visit(IN_operator_c *symbol);

   253

    void *visit(PT_operator_c *symbol);

   254

    void *visit(AND_operator_c *symbol);

   255

    void *visit(OR_operator_c *symbol);

   256

    void *visit(XOR_operator_c *symbol);

   257

    void *visit(ANDN_operator_c *symbol);

   258

    void *visit(ORN_operator_c *symbol);

   259

    void *visit(XORN_operator_c *symbol);

   260

    void *visit(ADD_operator_c *symbol);

   261

    void *visit(SUB_operator_c *symbol);

   262

    void *visit(MUL_operator_c *symbol);

   263

    void *visit(DIV_operator_c *symbol);

   264

    void *visit(MOD_operator_c *symbol);

   265

    void *visit(GT_operator_c *symbol);

   266

    void *visit(GE_operator_c *symbol);

   267

    void *visit(EQ_operator_c *symbol);

   268

    void *visit(LT_operator_c *symbol);

   269

    void *visit(LE_operator_c *symbol);

   270

    void *visit(NE_operator_c *symbol);

   271

    void *visit(CAL_operator_c *symbol);

   272

    void *visit(CALC_operator_c *symbol);

   273

    void *visit(CALCN_operator_c *symbol);

   274

    void *visit(RET_operator_c *symbol);

   275

    void *visit(RETC_operator_c *symbol);

   276

    void *visit(RETCN_operator_c *symbol);

   277

    void *visit(JMP_operator_c *symbol);

   278

    void *visit(JMPC_operator_c *symbol);

   279

    void *visit(JMPCN_operator_c *symbol);

   280

    /* Symbol class handled together with function call checks */

   281

    // void *visit(il_assign_operator_c *symbol, variable_name);

   282

    /* Symbol class handled together with function call checks */

   283

    // void *visit(il_assign_operator_c *symbol, option, variable_name);

   284

   285

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

   286

    /* B.3 - Language ST (Structured Text) */

   287

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

   288

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

   289

    /* B 3.1 - Expressions */

   290

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

   291

    void *visit(   deref_operator_c   *symbol);

   292

    void *visit(   deref_expression_c *symbol);

   293

    void *visit(     ref_expression_c *symbol);

   294

    void *visit(      or_expression_c *symbol);

   295

    void *visit(     xor_expression_c *symbol);

   296

    void *visit(     and_expression_c *symbol);

   297

    void *visit(     equ_expression_c *symbol);

   298

    void *visit(  notequ_expression_c *symbol);

   299

    void *visit(      lt_expression_c *symbol);

   300

    void *visit(      gt_expression_c *symbol);

   301

    void *visit(      le_expression_c *symbol);

   302

    void *visit(      ge_expression_c *symbol);

   303

    void *visit(     add_expression_c *symbol);

   304

    void *visit(     sub_expression_c *symbol);

   305

    void *visit(     mul_expression_c *symbol);

   306

    void *visit(     div_expression_c *symbol);

   307

    void *visit(     mod_expression_c *symbol);

   308

    void *visit(   power_expression_c *symbol);

   309

    void *visit(     neg_expression_c *symbol);

   310

    void *visit(     not_expression_c *symbol);

   311

    void *visit(function_invocation_c *symbol);

   312

   313

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

   314

    /* B 3.2.1 Assignment Statements */

   315

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

   316

    void *visit(assignment_statement_c *symbol);

   317

   318

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

   319

    /* B 3.2.2 Subprogram Control Statements */

   320

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

   321

    void *visit(fb_invocation_c *symbol);

   322

   323

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

   324

    /* B 3.2.3 Selection Statements */

   325

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

   326

    void *visit(if_statement_c *symbol);

   327

    //     void *visit(elseif_statement_list_c *symbol);

   328

    void *visit(elseif_statement_c *symbol);

   329

    void *visit(case_statement_c *symbol);

   330

    //     void *visit(case_element_list_c *symbol);

   331

    //     void *visit(case_element_c *symbol);

   332

    // void *visit(case_list_c *symbol);

   333

   334

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

   335

    /* B 3.2.4 Iteration Statements */

   336

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

   337

    void *visit(for_statement_c *symbol);

   338

    void *visit(while_statement_c *symbol);

   339

    void *visit(repeat_statement_c *symbol);

   340

   341

}; // print_datatypes_error_c

   342

   343

   344

   345

   346

   347

   348