campo-sirio/include/multirec.cpp

#include <stdlib.h>

#include <multirec.h>
#include <relation.h>

bool TMultiple_rectype::key_complete() const
{
  const RecDes& recd = rec_des();    // Descrizione del record
  const KeyDes& kd = recd.Ky[0];
  const int nf = kd.FieldSeq[kd.NkFields - 1] % MaxFields; //posizione ultimo campo chiave principale
  const RecFieldDes& rf = recd.Fd[nf];

  const TString& val = get(rf.Name);
  bool ok = !val.blank();
  if (ok)
  {
	  const int type = rf.TypeF;  // Controllo meglio i campi numerici
	  if (type == _intfld || type == _longfld || type == _intzerofld || type == _longzerofld)
	    ok = atol(val) > 0;
  }

  return ok;
}

//assegna il prossimo numero all'ultimo campo della chiave principale della testata
bool TMultiple_rectype::renum()
{
  const RecDes& recd = rec_des();    // Descrizione del record
  const KeyDes& kd = recd.Ky[0];
  const int nf = kd.FieldSeq[kd.NkFields - 1] % MaxFields; //posizione ultimo campo chiave principale
  const RecFieldDes& rf = recd.Fd[nf];

  const int type = rf.TypeF;  // Controllo che il campo sia numerico
  if (type != _intfld && type != _longfld && type != _intzerofld && type != _longzerofld)
    return false;

  TRectype::zero(rf.Name); //azzera il contenuto del campo chiave numerico
  long next_num = 1;

  if (kd.NkFields == 1)  //chiave principale con un solo campo
  {
    TLocalisamfile file(num());
    if (file.last() == NOERR)
      next_num += file.get_long(rf.Name);
  }
  else  //chiave principale con piu' campi
  {
    TRelation rel(num()); //relazione sul file principale
    TCursor cur(&rel, "", 1, this, this); //cursore generale per chiavi multicampo
    const long items = cur.items();
  
    if (items > 0)
    {
      cur.freeze();
      cur = items - 1;  //va sull'ultimo record del file
      next_num += cur.curr().get_long(rf.Name);
    }
  }

  put(rf.Name, next_num);

  return true;
}

void TMultiple_rectype::set_body_key(TRectype & rowrec)
{
  const RecDes& recd = rowrec.rec_des(); // Descrizione del record della testata
  const KeyDes& kd = recd.Ky[0];         // Elenco dei campi della chiave 1
  
  // Copia tutti i campi chiave, tranne l'ultimo, in tutti i records
  for (int i = kd.NkFields-2; i >= 0; i--)
  {                        
    const int nf = kd.FieldSeq[i] % MaxFields;
    const RecFieldDes& rf = recd.Fd[nf];  
    const TString& val = get(rf.Name);
    rowrec.renum_key(rf.Name, val);
  }
}

void TMultiple_rectype::load_rows_file(int logicnum)
{
  const int index = log2ind(logicnum);
  TRecord_array* r = (TRecord_array*)_files.objptr(index);
  if (r == NULL)
  {
    // crea
    if (logicnum <= 0) logicnum = lognum(index);
    r = new TRecord_array(logicnum, _numfields.row(index));
    _files.add(r, index);
  }
  TRectype* rec = new_body_record(logicnum);
  set_body_key(*rec);
  r->read(rec);  // rilegge
  _changed.reset(index);
}

int TMultiple_rectype::find(int logicnum, const char* fieldname, const char* s, int from, bool reverse) const
{
  const TRecord_array& recarray = body(logicnum);
  const int last = recarray.last_row();
  const int len = s ? strlen(s) : 0;

  if (reverse)
  {
    if (from > 0)
    {
      if (len == 0)
        return from - 1;
      for (int i = recarray.pred_row(from); i > 0; i = recarray.pred_row(i))
        if (recarray[i].get(fieldname) == s)
          return i;
    }
  }
  else
  {
    if (last > from)
    {
      if (len == 0)
        return from + 1;
      for (int i = recarray.succ_row(from); i <= last; i = recarray.succ_row(i))
        if (recarray[i].get(fieldname) == s)
          return i;
    }
  }
  return -1;
}

int TMultiple_rectype::write_rewrite(TBaseisamfile & f, bool re) const
{
  int err = NOERR;

  if (_nuovo && re)           // E' nuovo di zecca! quindi ...
    re = FALSE;               // ... non fare la rewrite

  if (re)
  {
    for (int i = _files.last(); err == NOERR && i >= 0 ; i = _files.pred(i))
    {
      TRecord_array * r = (TRecord_array *) _files.objptr(i);
      if (r && !_changed[i])
        err = r->write(re);
    }
    // rewrite:
    if (err == NOERR)
    {
      err = TRectype::rewrite(f);
      if (err != NOERR)
        err = TRectype::write(f);
    }
  }
  else
  {
    // write:
    TMultiple_rectype & myself = *(TMultiple_rectype *)this;
    const bool to_complete = !myself.key_complete();
    if (to_complete)
      myself.renum();
    myself.renum_key(); 
    myself._nuovo |= to_complete;
    if (_nuovo)
    {
      do
      {
        err = TRectype::write(f);
        if (err == _isreinsert)
          if (myself.renum())
            myself.renum_key();
          else
            break;
      } while (err == _isreinsert);
      myself._nuovo = (err != NOERR);
    }
    else
    {
      err = TRectype::write(f);
      if (err != NOERR)
        err = TRectype::rewrite(f);
    }
    for (int i = _files.last(); err == NOERR && i >= 0 ; i = _files.pred(i))
    {
      TRecord_array * r = (TRecord_array *)_files.objptr(i);
      if (r && !_changed[i])
        err = r->write(re);
    }
  }
  return err;
}

void TMultiple_rectype::remove_body(int logicnum)
{
  const int index = log2ind(logicnum);
  _files.destroy(index);
}

int TMultiple_rectype::log2ind(int logicnum) const
{
  if (logicnum <= 0)
    return 0;
  for (int i = _logicnums.last(); i >= 0 ; i--)
    if (lognum(i) == logicnum)
      return i;
  NFCHECK("Can't find file %d in multiple record", logicnum);
  return 0;
}

TRecord_array& TMultiple_rectype::body(int logicnum) const
{
  const int index = log2ind(logicnum);
  if (_files.objptr(index) == NULL || _changed[index])
    ((TMultiple_rectype*)this)->load_rows_file(lognum(index)); // logicnum may be 0!
  return (TRecord_array&)_files[index];
}

void TMultiple_rectype::renum_key()
{
  TString oldkey;
  for (int i = _files.last(); i >= 0 ; i = _files.pred(i)) 
  {
    const int logicnum = lognum(i);
    TRecord_array* b = &body(logicnum);
    if (b)
    {
      if (i==0)
        oldkey=b->key().build_key();
      // convertire al piu' presto le seguenti righe ...
      //TRectype * rec = new TRectype(b->key()); // Crea riga della classe base?
      TRectype* rec = new_body_record(logicnum); // Crea riga della classe giusta!
      set_body_key(*rec);
      b->set_key(rec); // Aggiorna righe
      // .. nella piu' economiche
      //set_body_key(*b);
      // ...dove set_body_key(TRecarray & b) e' la nuova funzione virtuale da implementare
      // che realizza direttamente la rinumerazione del record array
      if (i==0)
        if (oldkey != b->key().build_key())
          _nuovo = TRUE;
    }
  }
}


TRectype & TMultiple_rectype::operator =(const TRectype & r)
{
  TRectype::operator=(r);
  reset_fields(*this);
  set_fields(*this);
  return *this;
}

TRectype & TMultiple_rectype::operator =(const char * r)
{
  TRectype::operator=(r);
  reset_fields(*this);
  set_fields(*this);
  return *this;
}

void TMultiple_rectype::zero(char c)
{
  reset_fields(*this);
  TAuto_variable_rectype::zero(c);
  for (int i = _files.last(); i >= 0 ; i = _files.pred(i))
    ((TRecord_array &)_files[i]).destroy_rows();
  _nuovo = TRUE;
}

int TMultiple_rectype::readat(TBaseisamfile& f, TRecnotype nrec, word lockop)
{
  _nuovo = FALSE;
  int err = TRectype::readat(f, nrec, lockop);
  synchronize_bodies();
  return err;
}

int TMultiple_rectype::read(TBaseisamfile & f, word op, word lockop)
{
  int err = NOERR;

  _nuovo = FALSE;
  if (op == _isequal)
  {
    const TRectype oldr(*this);
  
    err = TRectype::read(f, op, lockop);
    if (err != NOERR)
    {
      *this = oldr;
      _nuovo = TRUE;
    }
  }                
  else
  {
    err = TRectype::read(f, op, lockop);
  }
  
  synchronize_bodies();
 
  return err;
}


void TMultiple_rectype::synchronize_bodies()
{
  for (int i = _logicnums.last(); i >= 0 ; i--)
  {
    if (_nuovo)          
    {   
      TRecord_array * b = (TRecord_array *) _files.objptr(i);
      if (b == NULL)
      {
        b = new TRecord_array(lognum(i), (TString &) _numfields[i]);
        _files.add(b, i);
      }
      _changed.reset(i);
      b->destroy_rows();  
      TRectype * r = new_body_record(lognum(i));
      set_body_key(*r);
      b->set_key(r);
    }
    else
    {
      if (_autoload[i])
        load_rows_file(lognum(i));
      else
        if (_files.objptr(i) != NULL)
          _changed.set(i);
    }
  }
}

// @mfunc Copia il multiple rectype r su quello corrente
TMultiple_rectype & TMultiple_rectype::copy(const TMultiple_rectype& r)
{
  // copia..  
  TAuto_variable_rectype::operator=((TAuto_variable_rectype&)r);

  _nuovo     = r._nuovo;
  _files     = r._files;
  _logicnums = r._logicnums;
  _changed   = r._changed;
  _autoload  = r._autoload;
  _numfields = r._numfields;   
  
  return *this;
}

// @mfunc Ritorna il numero di righe caricate
int TMultiple_rectype::loaded_rows(int logicnum) const
{          
  const int index = log2ind(logicnum);       
  TRecord_array* r = (TRecord_array*) ((TMultiple_rectype *) this)->_files.objptr(index);
  if (_changed[index] || r == NULL) 
    return 0;

  return r->rows();
}

// @mfunc confronta due record multipli
// Affidabilit<69> 95%
int TMultiple_rectype::compare(const TSortable& s) const
{                                  
  int res = TRectype::compare(s);
  TMultiple_rectype & m = (TMultiple_rectype &) s;

  for (int i =  0 ; res == 0 && i < _logicnums.items(); i++)
  {                                                 
    const int logicnum = lognum(i);
    TRecord_array & r = body(logicnum);
    TRecord_array & r1 = m.body(logicnum);
    res =  r.rows() - r1.rows();
    if (res == 0 && r.rows() > 0 && r1.rows() > 0)
    {
      for (int j = r.last_row(), k = r1.last_row(); res == 0 && j > 0 && k > 0; j = r.pred_row(j), k = r1.pred_row(k))
      {
        res = j - k; // Controlla che non  ci siano salti
        if (res == 0)
          res = r[j].compare(r1[j]);
      }
    }
  }
  return res;
}

// @mfunc controlla se due record multipli sono uguali
// Affidabilit<69> 100%
bool TMultiple_rectype::is_equal(const TMultiple_rectype& m) const
{                                  
  bool yes = TRectype::is_equal(m);
	const int last = _logicnums.last(); // qui
  for (int i = 0; yes && i < last; i++)
  {                                                 
    const int logicnum = lognum(i);
    TRecord_array & r = body(logicnum);
    TRecord_array & r1 = m.body(logicnum);
    yes = r.rows() == r1.rows();
    if (yes && r.rows() > 0 && r1.rows() > 0)
    {
      for (int j = r.last_row(), k = r1.last_row(); yes && j > 0 && k > 0; j = r.pred_row(j), k = r1.pred_row(k))
      {
        yes = (j == k) && r[j].is_equal(r1[k]);
      }
    }
  }
  return yes;
}

int TMultiple_rectype::remove(TBaseisamfile & f) const
{
  int err = NOERR;
  for (int i = _logicnums.last(); err == NOERR && i >= 0 ; i = _logicnums.pred(i))
  {
    TRecord_array & r = body(lognum(i));
    err = r.remove();
  }
  if (err == NOERR)
    err = TRectype::remove(f);
  return err;
}

void TMultiple_rectype::fill_transaction(TConfig& cfg, int row) const
{
  CHECK(row == 0, "You can't specify a row for multiple rectypes");
  TRectype::fill_transaction(cfg);
	const int last = _logicnums.last(); // qui
  for (int i = 0; i < last; i++)
  {                           
    TRecord_array& b = body(lognum(i));
    for (int r = 1; b.exist(r); r++)
      b[r].fill_transaction(cfg, r);
  }  
}

// @doc INTERNAL
TMultiple_rectype::TMultiple_rectype(int hfn)
                  : TAuto_variable_rectype(hfn), _nuovo(TRUE)
{
}

void TMultiple_rectype::enable_autoload(int logicnum,bool on)
{
  const int index = log2ind(logicnum);
  _autoload.set(index, on);
}
              
TRectype & TMultiple_rectype::insert_row(int row, int logicnum)
{       
  TRectype * r = new_body_record(logicnum);
  TRecord_array & b = body(logicnum);
  const int index = log2ind(logicnum);
  
  set_body_key(*r);
  r->put(_numfields.row(index), row);     
  b.insert_row(r);
  return *r;
}

TRectype & TMultiple_rectype::new_row(int logicnum)
{
  TRecord_array& b = body(logicnum);
  TRectype& r = b.row(-1, true);
  
  return r;
}

bool TMultiple_rectype::autoload_enabled(int logicnum)
{
  return _autoload[log2ind(logicnum)];
}

// @cmember Aggiunge il corpo lgicnum
void TMultiple_rectype::add_file(int logicnum, const char* numfield)
{
  _logicnums.add_long(logicnum);
  _numfields.add(numfield);
}

TMultiple_rectype::TMultiple_rectype(const TBaseisamfile* file)
                  :TAuto_variable_rectype(file), _nuovo(TRUE)
{
}

  // @ cmember costruttore dal record
TMultiple_rectype::TMultiple_rectype(const TRectype & rec)
                  :TAuto_variable_rectype(rec), _nuovo(TRUE)
{
}

// @mfunc costruttore di copia
TMultiple_rectype::TMultiple_rectype(const TMultiple_rectype& r)
                  :TAuto_variable_rectype(r)
{
  // copia..
  copy(r);
}