1

/****

     2

 * IEC 61131-3 standard function lib

     3

 */

     4

     5

#include <limits.h>

     6

#include <float.h>

     7

#include <math.h>

     8

#include <time.h>

     9

#include <sys/types.h>

    10

    11

#include <stdio.h>

    12

#include <stdlib.h>

    13

#include <string.h>

    14

#include <stdarg.h>

    15

    16

#include "iec_std_lib_generated.h"

    17

    18

#define __print_BOOL(name) printf("  %s = (BOOL) %s\n",#name, name?"TRUE":"FALSE");

    19

#define __print_SINT(name) printf("  %s = (SINT) %d\n",#name, name);

    20

#define __print_INT(name) printf("  %s = (INT) %d\n",#name, name);

    21

#define __print_DINT(name) printf("  %s = (DINT) %d\n",#name, name);

    22

#define __print_LINT(name) printf("  %s = (LINT) %d\n",#name, name);

    23

#define __print_USINT(name) printf("  %s = (USINT) %u\n",#name, name);

    24

#define __print_UINT(name) printf("  %s = (UINT) %u\n",#name, name);

    25

#define __print_UDINT(name) printf("  %s = (UDINT) %u\n",#name, name);

    26

#define __print_ULINT(name) printf("  %s = (ULINT) %lu\n",#name, name);

    27

#define __print_REAL(name) printf("  %s = (REAL) %f\n",#name, (double)name);

    28

#define __print_LREAL(name) printf("  %s = (LREAL) %f\n",#name, (double)name);

    29

#define __print_TIME(name) {STRING __tmp = __time_to_string(name);__tmp.body[__tmp.len] = 0; printf("  %s = (TIME) %*s\n",#name, __tmp.len, &__tmp.body);}

    30

#define __print_DATE(name) {STRING __tmp = __date_to_string(name);__tmp.body[__tmp.len] = 0; printf("  %s = (DATE) %*s\n",#name, __tmp.len, &__tmp.body);}

    31

#define __print_TOD(name) {STRING __tmp = __tod_to_string(name);__tmp.body[__tmp.len] = 0; printf("  %s = (TOD) %*s\n",#name, __tmp.len, &__tmp.body);}

    32

#define __print_DT(name) {STRING __tmp = __dt_to_string(name);__tmp.body[__tmp.len] = 0; printf("  %s = (DT) %*s\n",#name, __tmp.len, &__tmp.body);}

    33

#define __print_STRING(name) printf("  %s = (STRING) {%d, \"%*s\"}\n",#name, name.len, name.len, &name.body);

    34

#define __print_BYTE(name) printf("  %s = (BYTE) 0x%2.2x\n",#name, name);

    35

#define __print_WORD(name) printf("  %s = (WORD) 0x%4.4x\n",#name, name);

    36

#define __print_DWORD(name) printf("  %s = (DWORD) 0x%8.8x\n",#name, name);

    37

#define __print_LWORD(name) printf("  %s = (LWORD) 0x%16.16lx\n",#name, name);

    38

    39

#ifdef DEBUG_IEC

    40

#define DBG(...) printf(__VA_ARGS__);

    41

#define DBG_TYPE(TYPENAME, name) __print_##TYPENAME(name);

    42

#else

    43

#define DBG(...)

    44

#define DBG_TYPE(TYPENAME, name)

    45

#endif

    46

    47

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

    48

/*  Types defs   */

    49

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

    50

    51

typedef u_int8_t  BOOL;

    52

    53

#define TRUE 1

    54

#define FALSE 0

    55

    56

typedef int8_t    SINT;

    57

typedef int16_t   INT;

    58

typedef int32_t   DINT;

    59

typedef int64_t   LINT;

    60

    61

typedef u_int8_t    USINT;

    62

typedef u_int16_t   UINT;

    63

typedef u_int32_t   UDINT;

    64

typedef u_int64_t   ULINT;

    65

    66

typedef u_int8_t    BYTE;

    67

typedef u_int16_t   WORD;

    68

typedef u_int32_t   DWORD;

    69

typedef u_int64_t   LWORD;

    70

    71

typedef float    REAL;

    72

typedef double   LREAL;

    73

    74

typedef struct timespec TIME;

    75

typedef struct timespec DATE;

    76

typedef struct timespec DT;

    77

typedef struct timespec TOD;

    78

    79

#define __TIME_CMP(t1, t2) (t2.tv_sec == t1.tv_sec ? t2.tv_nsec - t1.tv_nsec : t1.tv_sec - t2.tv_sec) 

    80

extern TIME __CURRENT_TIME;

    81

    82

#define STR_MAX_LEN 40

    83

typedef int8_t __strlen_t;

    84

typedef struct {

    85

    __strlen_t len;

    86

    u_int8_t body[STR_MAX_LEN];

    87

} STRING;

    88

    89

#define __STR_CMP(str1, str2) memcmp((char*)&str1.body,(char*)&str2.body, str1.len < str2.len ? str1.len : str2.len)

    90

    91

/* TODO

    92

typedef struct {

    93

    __strlen_t len;

    94

    u_int16_t body[STR_MAX_LEN];

    95

} WSTRING;

    96

*/

    97

   121

#define __INIT_REAL 0

   122

#define __INIT_LREAL 0

   123

#define __INIT_SINT 0

   124

#define __INIT_INT 0

   125

#define __INIT_DINT 0

   126

#define __INIT_LINT 0

   127

#define __INIT_USINT 0

   128

#define __INIT_UINT 0

   129

#define __INIT_UDINT 0

   130

#define __INIT_ULINT 0

   131

#define __INIT_TIME (TIME){0,0}

   132

#define __INIT_BOOL 0

   133

#define __INIT_BYTE 0

   134

#define __INIT_WORD 0

   135

#define __INIT_DWORD 0

   136

#define __INIT_LWORD 0

   137

#define __INIT_STRING (STRING){0,""}

   138

//#define __INIT_WSTRING

   139

#define __INIT_DATE (DATE){0,0}

   140

#define __INIT_TOD (TOD){0,0}

   141

#define __INIT_DT (DT){0,0}

   142

   143

typedef union __IL_DEFVAR_T {

   144

    BOOL    BOOLvar;

   145

   146

    SINT    SINTvar;

   147

    INT     INTvar;

   148

    DINT    DINTvar;

   149

    LINT    LINTvar;

   150

   151

    USINT   USINTvar;

   152

    UINT    UINTvar;

   153

    UDINT   UDINTvar;

   154

    ULINT   ULINTvar;

   155

   156

    BYTE    BYTEvar;

   157

    WORD    WORDvar;

   158

    DWORD   DWORDvar;

   159

    LWORD   LWORDvar;

   160

   161

    REAL    REALvar;

   162

    LREAL   LREALvar;

   163

   164

    TIME    TIMEvar;

   165

    TOD TODvar;

   166

    DT  DTvar;

   167

    DATE    DATEvar;

   168

} __IL_DEFVAR_T;

   169

   170

   171

   172

   173

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

   174

/* Misc internal */

   175

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

   176

   177

/* function that generates an IEC runtime error */

   178

static inline void IEC_error(void) {

   179

  /* TODO... */

   180

  fprintf(stderr, "IEC 61131-3 runtime error.\n");

   181

  /*exit(1);*/

   182

}

   183

   184

   185

static inline void __normalize_timespec (struct timespec *ts) {

   186

  if( ts->tv_nsec < -1000000000 || (( ts->tv_sec > 0 ) && ( ts->tv_nsec < 0 ))){

   187

    ts->tv_sec--;

   188

    ts->tv_nsec += 1000000000;

   189

  }

   190

  if( ts->tv_nsec > 1000000000 || (( ts->tv_sec < 0 ) && ( ts->tv_nsec > 0 ))){

   191

    ts->tv_sec++;

   192

    ts->tv_nsec -= 1000000000;

   193

  }

   194

}

   195

   196

static inline struct timespec __time_to_timespec(int sign, double mseconds, double seconds, double minutes, double hours, double days) {

   197

  struct timespec ts;

   198

   199

  /* sign is 1 for positive values, -1 for negative time... */

   200

  long double total_sec = ((days*24 + hours)*60 + minutes)*60 + seconds + mseconds/1e3;

   201

  if (sign >= 0) sign = 1; else sign = -1;

   202

  ts.tv_sec = sign * (long int)total_sec;

   203

  ts.tv_nsec = sign * (long int)((total_sec - ts.tv_sec)*1e9);

   204

   205

  return ts;

   206

}

   207

   208

   209

static inline struct timespec __tod_to_timespec(double seconds, double minutes, double hours) {

   210

  struct timespec ts;

   211

   212

  long double total_sec = (hours*60 + minutes)*60 + seconds;

   213

  ts.tv_sec = (long int)total_sec;

   214

  ts.tv_nsec = (long int)((total_sec - ts.tv_sec)*1e9);

   215

   216

  return ts;

   217

}

   218

   219

static inline struct timespec __date_to_timespec(int day, int month, int year) {

   220

  struct timespec ts;

   221

  struct tm broken_down_time;

   222

   223

  broken_down_time.tm_sec = 0;

   224

  broken_down_time.tm_min = 0;

   225

  broken_down_time.tm_hour = 0;

   226

  broken_down_time.tm_mday = day;  /* day of month, from 1 to 31 */

   227

  broken_down_time.tm_mon = month - 1;   /* month since January, in the range 0 to 11 */

   228

  broken_down_time.tm_year = year - 1900;  /* number of years since 1900 */

   229

   230

  time_t epoch_seconds = mktime(&broken_down_time); /* determine number of seconds since the epoch, i.e. Jan 1st 1970 */

   231

   232

  if ((time_t)(-1) == epoch_seconds)

   233

    IEC_error();

   234

   235

  ts.tv_sec = epoch_seconds;

   236

  ts.tv_nsec = 0;

   237

   238

  return ts;

   239

}

   240

   241

static inline struct timespec __dt_to_timespec(double seconds,  double minutes, double hours, int day, int month, int year) {

   242

  struct timespec ts;

   243

   244

  long double total_sec = (hours*60 + minutes)*60 + seconds;

   245

  ts.tv_sec = (long int)total_sec;

   246

  ts.tv_nsec = (long int)((total_sec - ts.tv_sec)*1e9);

   247

   248

  struct tm broken_down_time;

   249

  broken_down_time.tm_sec = 0;

   250

  broken_down_time.tm_min = 0;

   251

  broken_down_time.tm_hour = 0;

   252

  broken_down_time.tm_mday = day;  /* day of month, from 1 to 31 */

   253

  broken_down_time.tm_mon = month - 1;   /* month since January, in the range 0 to 11 */

   254

  broken_down_time.tm_year = year - 1900;  /* number of years since 1900 */

   255

   256

  time_t epoch_seconds = mktime(&broken_down_time); /* determine number of seconds since the epoch, i.e. Jan 1st 1970 */

   257

  if ((time_t)(-1) == epoch_seconds)

   258

    IEC_error();

   259

   260

  ts.tv_sec += epoch_seconds;

   261

  if (ts.tv_sec < epoch_seconds)

   262

    /* since the TOD is always positive, if the above happens then we had an overflow */

   263

    IEC_error();

   264

   265

  return ts;

   266

}

   267

   268

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

   269

/*   Time ops  */

   270

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

   271

static inline TIME __date_and_time_to_time_of_day(TIME IN){

   272

  return (TIME){IN.tv_sec % 86400, IN.tv_nsec};

   273

}

   274

static inline TIME __date_and_time_to_date(TIME IN){

   275

  return (TIME){IN.tv_sec - (IN.tv_sec % (24*60*60)), 0};

   276

}

   277

static inline TIME __time_add(TIME IN1, TIME IN2){

   278

  TIME res ={IN1.tv_sec + IN2.tv_sec,

   279

             IN1.tv_nsec + IN2.tv_nsec };

   280

  __normalize_timespec(&res);

   281

  return res;

   282

}

   283

static inline TIME __time_sub(TIME IN1, TIME IN2){

   284

  TIME res ={IN1.tv_sec - IN2.tv_sec,

   285

             IN1.tv_nsec - IN2.tv_nsec };

   286

  __normalize_timespec(&res);

   287

  return res;

   288

}

   289

static inline TIME __time_mul(TIME IN1, LREAL IN2){

   290

  LREAL s_f = IN1.tv_sec * IN2;

   291

  time_t s = s_f;

   292

  div_t ns = div((LREAL)IN1.tv_nsec * IN2, 1000000000);

   293

  TIME res = {s + ns.quot,

   294

              ns.rem + (s_f - s) * 1000000000 };

   295

  __normalize_timespec(&res);

   296

  return res;

   297

}

   298

static inline TIME __time_div(TIME IN1, LREAL IN2){

   299

  LREAL s_f = IN1.tv_sec / IN2;

   300

  time_t s = s_f;

   301

  TIME res = {s,

   302

              IN1.tv_nsec / IN2 + (s_f - s) * 1000000000 };

   303

  __normalize_timespec(&res);

   304

  return res;

   305

}

   306

   307

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

   308

/* String ops  */

   309

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

   310

static inline UINT __len(STRING IN){

   311

    return IN.len;

   312

}

   313

static inline STRING __left(STRING IN, SINT L){

   314

    STRING res = __INIT_STRING;

   315

    L = L < IN.len ? L : IN.len;

   316

    memcpy(&res.body, &IN.body, L);

   317

    res.len = L;

   318

    return res;

   319

}

   320

static inline STRING __right(STRING IN, SINT L){

   321

    STRING res = __INIT_STRING;

   322

    L = L < IN.len ? L : IN.len;

   323

    memcpy(&res.body, &IN.body[IN.len - L], L);

   324

    res.len = L;

   325

    return res;

   326

}

   327

static inline STRING __mid(STRING IN, SINT L, SINT P){

   328

    STRING res = __INIT_STRING;

   329

    if(P <= IN.len){

   330

	    P -= 1; /* now can be used as [index]*/

   331

	    L = L + P <= IN.len ? L : IN.len - P;

   332

	    memcpy(&res.body, &IN.body[P] , L);

   333

        res.len = L;

   334

    }

   335

    return res;

   336

}

   337

static inline STRING __concat(SINT param_count, ...){

   338

  va_list ap;

   339

  UINT i;

   340

  __strlen_t charcount = 0;

   341

  STRING res = __INIT_STRING;

   342

   343

  va_start (ap, param_count);         /* Initialize the argument list.  */

   344

   345

  for (i = 0; i < param_count && charcount < STR_MAX_LEN; i++)

   346

  {

   347

    STRING tmp = va_arg(ap, STRING);

   348

    __strlen_t charrem = STR_MAX_LEN - charcount;

   349

    __strlen_t to_write = tmp.len > charrem ? charrem : tmp.len;

   350

    memcpy(&res.body[charcount], &tmp.body , to_write);

   351

    charcount += to_write;

   352

  }

   353

   354

  res.len = charcount;

   355

   356

  va_end (ap);                  /* Clean up.  */

   357

  return res;

   358

}

   359

static inline STRING __insert(STRING IN1, STRING IN2, SINT P){

   360

    STRING res = __INIT_STRING;

   361

    __strlen_t to_copy;

   362

   363

    to_copy = P > IN1.len ? IN1.len : P - 1;

   364

    memcpy(&res.body, &IN1.body , to_copy);

   365

    P = res.len = to_copy;

   366

   367

    to_copy = IN2.len + res.len > STR_MAX_LEN ? STR_MAX_LEN - res.len : IN2.len;

   368

    memcpy(&res.body[res.len], &IN2.body , to_copy);

   369

    res.len += to_copy;

   370

   371

    to_copy = IN1.len - P < STR_MAX_LEN - res.len ? IN1.len - P : STR_MAX_LEN - res.len ;

   372

    memcpy(&res.body[res.len], &IN1.body[P] , to_copy);

   373

    res.len += to_copy;

   374

   375

    return res;

   376

}

   377

static inline STRING __delete(STRING IN, SINT L, SINT P){

   378

    STRING res = __INIT_STRING;

   379

    __strlen_t to_copy;

   380

   381

    to_copy = P > IN.len ? IN.len : P-1;

   382

    memcpy(&res.body, &IN.body , to_copy);

   383

    P = res.len = to_copy;

   384

   385

    if( IN.len > P + L ){

   386

        to_copy = IN.len - P - L;

   387

        memcpy(&res.body[res.len], &IN.body[P + L], to_copy);

   388

        res.len += to_copy;

   389

    }

   390

   391

    return res;

   392

}

   393

static inline STRING __replace(STRING IN1, STRING IN2, SINT L, SINT P){

   394

    STRING res = __INIT_STRING;

   395

    __strlen_t to_copy;

   396

   397

    to_copy = P > IN1.len ? IN1.len : P-1;

   398

    memcpy(&res.body, &IN1.body , to_copy);

   399

    P = res.len = to_copy;

   400

   401

    to_copy = IN2.len < L ? IN2.len : L;

   402

   403

    if( to_copy + res.len > STR_MAX_LEN ) 

   404

       to_copy = STR_MAX_LEN - res.len;   

   405

   406

    memcpy(&res.body[res.len], &IN2.body , to_copy);

   407

    res.len += to_copy;

   408

   409

    P += L;

   410

    if( res.len <  STR_MAX_LEN && P < IN1.len)

   411

    {

   412

        to_copy = IN1.len - P;

   413

        memcpy(&res.body[res.len], &IN1.body[P] , to_copy);

   414

        res.len += to_copy;

   415

    }

   416

   417

    return res;

   418

}

   419

   420

   421

   422

static inline UINT __pfind(STRING* IN1, STRING* IN2){

   423

    UINT count1 = 0; /* offset of first matching char in IN1 */

   424

    UINT count2 = 0; /* count of matching char */

   425

    while(count1 + count2 < IN1->len && count2 < IN2->len)

   426

    {

   427

        if(IN1->body[count1 + count2] != IN2->body[count2++]){

   428

            count1 += count2;

   429

            count2 = 0;

   430

        }        

   431

    }

   432

    return count2 == IN2->len -1 ? 0 : count1 + 1;

   433

}

   434

static inline UINT __find(STRING IN1, STRING IN2){

   435

    return __pfind(&IN1, &IN2);

   436

}

   437

   438

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

   439

/* Convertions */

   440

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

   441

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

   442

    /*  TO_STRING  */

   443

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

   444

static inline STRING __bool_to_string(BOOL IN)

   445

{

   446

    if(IN)

   447

        return (STRING){4, "TRUE"};

   448

    return (STRING){5,"FALSE"};

   449

}

   450

static inline STRING __bit_to_string(LWORD IN){

   451

    STRING res = __INIT_STRING;

   452

    res.len = snprintf(res.body, STR_MAX_LEN, "16#%llx", IN);

   453

    if(res.len > STR_MAX_LEN) res.len = STR_MAX_LEN;

   454

    return res;

   455

}

   456

static inline STRING __real_to_string(LREAL IN){

   457

    STRING res = __INIT_STRING;

   458

    res.len = snprintf(res.body, STR_MAX_LEN, "%.10g", IN);

   459

    if(res.len > STR_MAX_LEN) res.len = STR_MAX_LEN;

   460

    return res;

   461

}

   462

static inline STRING __sint_to_string(LINT IN){

   463

    STRING res = __INIT_STRING;

   464

    res.len = snprintf(res.body, STR_MAX_LEN, "%lld", IN);

   465

    if(res.len > STR_MAX_LEN) res.len = STR_MAX_LEN;

   466

    return res;

   467

}

   468

static inline STRING __uint_to_string(ULINT IN){

   469

    STRING res = __INIT_STRING;

   470

    res.len = snprintf(res.body, STR_MAX_LEN, "%llu", IN);

   471

    if(res.len > STR_MAX_LEN) res.len = STR_MAX_LEN;

   472

    return res;

   473

}

   474

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

   475

    /* FROM_STRING */

   476

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

   477

static inline BOOL __string_to_bool(STRING IN){

   478

    return IN.len == 5 ? !memcmp(&IN.body,"TRUE", IN.len) : 0;

   479

}

   480

   481

static inline LINT __pstring_to_sint(STRING* IN){

   482

    LINT res = 0;

   483

    char tmp[STR_MAX_LEN];

   484

    char tmp2[STR_MAX_LEN];

   485

    __strlen_t l;

   486

    unsigned int shift = 0;

   487

   488

    if(IN->body[0]=='2' && IN->body[1]=='#'){

   489

        /* 2#0101_1010_1011_1111 */

   490

        for(l = IN->len - 1; l >= 2 && shift < 64; l--)

   491

        {

   492

            char c = IN->body[l];

   493

            if( c >= '0' && c <= '1'){

   494

                res |= ( c - '0') << shift;

   495

                shift += 1;

   496

            }

   497

        }

   498

    }else if(IN->body[0]=='8' && IN->body[1]=='#'){

   499

        /* 8#1234_5665_4321 */

   500

        for(l = IN->len - 1; l >= 2 && shift < 64; l--)

   501

        {

   502

            char c = IN->body[l];

   503

            if( c >= '0' && c <= '7'){

   504

                res |= ( c - '0') << shift;

   505

                shift += 3;

   506

            }

   507

        }

   508

    }else if(IN->body[0]=='1' && IN->body[1]=='6' && IN->body[2]=='#'){

   509

        /* 16#1234_5678_9abc_DEFG */

   510

        for(l = IN->len - 1; l >= 3 && shift < 64; l--)

   511

        {

   512

            char c = IN->body[l];

   513

            if( c >= '0' && c <= '9'){

   514

                res |= (LWORD)( c - '0') << shift;