#include <stdio.h>
#include <stdlib.h>        

#define __ISAM_CPP

#ifndef FOXPRO
#include <expr.h>
#include <execp.h>
#include <progind.h>
#endif

#include <config.h>
#include <extcdecl.h>
#include <mailbox.h>                
#include <prefix.h>
#include <relation.h>
#include <scanner.h>
#include <utility.h>  
#include <memo.h>
#include <codeb.h>  
#include <varrec.h>

#define RECLOCKTYPES    0xFF00
#define READTYPES       0x00FF                                                                       
#define INVFLD          255

Str80    cprefix;

HIDDEN char _isam_string[257];

#define NOALLOC (char **) -1

HIDDEN bool __autoload = TRUE;   
                                    
// @doc INTERNAL

////////////////////////////////////////////////////////////////////////////////////////////////////
// Funzioni C 
////////////////////////////////////////////////////////////////////////////////////////////////////

int hashfun(const char *s) 
{
  int             l = strlen(s);
  unsigned short  temp = 0, *pw = (unsigned short *) s;

  const unsigned short * end = (unsigned short *) (s + (l - 1));
  while ((char *) pw < (char *) end)
  {
    temp ^= *pw;
    pw++;
  }                       
  if (ODD(l))
   temp ^= (unsigned short ) (8192 + s[l - 1]);
  l = (short) (temp % (MaxFields - 3));            
  CHECKS(l >= 0, "Negative remainder on ", s);
  return(l);
}

int findfld(const RecDes *recd, const char *s) 
{
  short stp = hashfun(s);

  for (byte i = 0 ; i < MaxFields; i++) 
  {                             
    if (stp + i >= MaxFields)
      stp -= MaxFields;
    byte p = stp + i;
    const int fp = recd->SortFd[p];
    
    if (fp == INVFLD) return(FIELDERR);
    
    const int cmp = strcmp(recd->Fd[fp].Name, s);
    if (!cmp)
      return (int) fp;
    else
      if (cmp > 0) return(FIELDERR);
  }
  return(FIELDERR);
}

void __getfieldbuff(byte l, byte t, const char * recin, char *s)

{     
  CHECK(recin, "Can't read from a Null record");
  
  if (t != _alfafld && t != _datefld)
  {                   
    if (t == _intzerofld || t == _longzerofld)
    {             
      byte i = 0;
      for (char* c = (char*)recin; *c == ' ' && i < l; c++, i++)
        *c = '0';     
      if (i == l) 
        l = 0;  
    }
    else                            
    {
      while ((*recin == ' ') && (l))
      {
        recin++;
        l--;
      }
      if ((t != _realfld) && (t != _charfld))
      {
        while ((*recin == '0') && (l))
        {
          recin++;
          l--;
        }
      }
    }  
  }

  if (l)
  {
    while(l > 0 && recin[l - 1] == ' ') l--;
    if (l)
      strncpy(s, recin, l);
  }
  s[l] = '\0'; 
  if (l)
  {
    if (t == _datefld)
    {
      TDate dt(s);
#ifdef _DEMO_
      int y = dt.year();
      if (y & 0x0001) y--;  
      y >>= 3;
      y++;
      y /= 10; 
      if (y >= 25)
      {
        int m = dt.month();
        if (m > 3)
          dt.set_month(rand() % 3 + 1);
      }
#endif
      strcpy(s, dt.string(full));
    }
    else
      if (t == _boolfld)
      {
        const char ok = toupper(*s);
        if (ok == 'T' || ok == 'Y' || ok == 'S' || ok == 'X')
          strcpy(s,"X");
        else
          strcpy(s," ");
      }    
  }
}

void  __putfieldbuff(byte l, byte d, byte t, const char* s, char* recout)
{
  int len, i;

  CHECK(recout, "Can't write null record" );

  char s2[40];

  if (t == _datefld)
  {
    if (*s)
    {
      const TDate dt(s);    
      strcpy(s2, dt.string(ANSI));
      s = s2;
    }
  }
  else
    if (t == _boolfld)
    {           
      strcpy(s2, (*s && strchr("STXY", toupper(*s)) != NULL) ? "T" : "F");
      s = s2;
    }
    else
      if (t == _realfld)
      {
        real r(s);
        strcpy(s2, r.string(l, d)); 
        s = s2;
      }

  len = strlen(s);
  
  const bool exceeded = len > l;

  if ((t == _intfld)     ||
      (t == _longfld)    ||
      (t == _wordfld)    ||
      (t == _realfld)    ||
      (t == _intzerofld) ||
      (t == _longzerofld)
      )
  {
    if (len == 0 || exceeded)
    {
      strcpy(s2, "0");
      s = s2;
      len = 1;
    } 
    
    const char c = (t == _intzerofld || t == _longzerofld) ? '0' : ' ';
    for  (i = l - len - 1; i >= 0; i--) recout[i] = c;
    strncpy(&recout[l - len], s, len) ;
  }
  else
  {
    if (exceeded)
      len = l;
    strncpy(recout, s, len) ;
    for  (i = l - 1; i >= len; i--) recout[i] = ' ';
  }
}      

////////////////////////////////////////////////////////////////////////////////////////////////////
// Funzioni implementate per la gestione file dati tramite Codebase
////////////////////////////////////////////////////////////////////////////////////////////////////
// Inizio(@)

// @doc INTERNAL

// @func Ritorna una Token_string con in nome dell'indice
void get_idx_names(
     int logicnum,    // @parm Numero logico del file di cui riconoscere l'indice
     TToken_string& i_names)  // @parm Token_string in cui inserire il nome dell'indice

// @comm Ritorna il nome con il prefisso corrente
{
  long      c = DB_getconf();
  TDir      d; 
  TTrec     r;
  d.get(logicnum);
  r.get(logicnum);
  TFilename f(d.name());
  
  if ( c & 1) f.ext("cdx");
  if ( c & 4) f.ext("mdx");
  i_names.cut(0);
  i_names.add(f);
  f.ext("");
  f.rtrim(1);
  if (c & 2 || c & 8)    // DBIII or CLIPPER format, returns f_name + .cgp, f_nameX + .n{d|t}x
    for (int j=1; j<=r.keys();j++)
    { 
      TString xx=f.name();
      if (xx.len()<8)
        f << ('0' + j);
      else
        f[8] = ('0' + j); 
      if (c & 2) // CLIPPER
        f.ext("ndx");        
      else       // DBIII
        f.ext("ntx");
      i_names.add(f);
    }
  i_names.restart();
}

// Converte un errore di codebase in un errore isam
int get_error(int err)
{   
//   Codici negativi
HIDDEN int error_codes_g[] = {-1,_isnotopen,-1,-1,-1,_islocked,-1,-1,-1,-1,-1,-1,_isfilefull,
                              -1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,-1,_iskeynotfound,_ispatherr,-1,-1,_isdupkey}; 
//   Codici da 0 a 9
HIDDEN int error_codes_ra[] = {NOERR,NOERR,_iskeynotfound,_iseof,_isbof,_isnrecerr}  ;
//   Codici da  10 a ...  
HIDDEN int error_codes_rb[] = {-1,-1,_isreinsert,-1,-1,_islocked,-1,_isalropen,_iskeyerr }      ;

  int isamerr = NOERR;
  if (err > 0)  
  { 
    if (err >= 10)
    {
      if (err > 80 || error_codes_rb[err/10]==-1) 
        isamerr = err;
      else
        isamerr = error_codes_rb[err/10];
    }
    else
      isamerr = error_codes_ra[err];      
  }
  else
    if (err < 0)
    { 
      if (err == -1)
        isamerr = _isnotopen;
      else
      {
        int ierr = DB_get_error();  
        if (ierr == 0) ierr = -err;  // DB_get_error already called
        if (ierr < 0) ierr = -ierr;
        if (ierr > 340 || error_codes_g[ierr/10]==-1) 
          isamerr = -ierr;
        else
          isamerr = error_codes_g[ierr/10];
      }
    }                    
  DB_zero_error();      
  return isamerr;
}

HIDDEN bool rec_has_memo(const RecDes* rd)
{ 
  for( int i = rd->NFields - 1; i >= 0; i--)
    if (rd->Fd[i].TypeF == _memofld)
      return  TRUE;
  return FALSE;
}  

HIDDEN void browse_null(char *start, int nc)
{                 
  for (int i = nc - 1; i >= 0 ; i--) // Anche il primo byte(deletion flag) deve essere cambiato. nc comprende il primo byte
    if (start[i] == '\0') start[i] = ' '; 
}

HIDDEN  int __build_key(const RecDes *recd, int numkey, RecType recin, char *key, bool build_x_cb)
  /* *recd;       descrittore record               */
  /* numkey;      numero chiave                    */
  /* recin;       buffer contenente il record      */
  /* *key;        valore della chiave              */
  /* build_x_cb   flag di costruzione per codebase */
{           
  CHECKD(numkey > 0, "Can't build key ", numkey);
  
  const char null_char = -1;
  key[0] = '\0';
  if (numkey-- <= recd->NKeys)
  { 
    int l = 0;                                   
    for (int i = 0; i < recd->Ky[numkey].NkFields; i++)
    {                        
      const KeyDes& kd = recd->Ky[numkey];
      const bool upp = kd.FieldSeq[i] > MaxFields;
      const int nf = upp ? kd.FieldSeq[i] - MaxFields : kd.FieldSeq[i];
      const RecFieldDes& rf = recd->Fd[nf];  
      const TFieldtypes f = (TFieldtypes) rf.TypeF;
      
      int off, len;
      if (kd.FromCh[i] == 255)
      {
        off = rf.RecOff;
        len = rf.Len;
      }
      else
      { 
        off = rf.RecOff + kd.FromCh[i];
        len = kd.ToCh[i] - kd.FromCh[i] + 1;
      }
      if ((l + len) > 80)
      {
        key[0] = '\0';
        return(_iskeylenerr);
      }
      if (f == _boolfld) 
      {               
        const bool on = *(recin + off) > ' ' && strchr("STXY", *(recin + off)) != NULL;
        key[l] = on ? 'T' : 'F';
      }  
      else             
        strncpy((key + l), (recin + off), len);
        
      if (recin[off] == '\0')
      {
        memset(key + l, ' ', len);
        if ((f == _intfld) || (f == _longfld) || (f == _wordfld) || 
                            (f == _intzerofld) || (f == _longzerofld))
          key[l + len - 1] = build_x_cb ? '0' : null_char;
      }
      else
        if ((f == _intfld) || (f == _longfld) || (f == _wordfld) || (f == _intzerofld) || (f == _longzerofld))
        {   
          int w = l, j = l + len;
          while (w < j && key[w] == ' ') w++;
          while (w < j && key[w] == '0') key[w++] = ' ';
          if (w == j) key[w-1] = build_x_cb ? '0' : null_char;
        } 
      if (upp)
        for (int i = l+len-1; i >= l; i--)
          key[i] = toupper(key[i]);

      l += len;
    }
    
    // rtrim            
    if (build_x_cb)
    {
      for (l--; l>=0 && key[l] == ' '; l--);
      key[l + 1] = '\0';
    }
    else
    {
      for (l--; l>=0 && (key[l] == ' ' || key[l] == null_char); l--);
      key[l + 1] = '\0';
      for (;l >= 0; l--)
        if (key[l] == null_char)
          key[l] = '0';
    }
    
    return(NOERR);
  }
  return(_ispatherr);
}


HIDDEN int cisread(int fhnd, int knum, TRectype& record, int mode, TRecnotype& curr_recno)
{
  const int rmode = (mode & READTYPES);
  const int lmode = (mode & RECLOCKTYPES);

  // Non usare mai _isnextn o _isprevn, usare il metodo skip!  
  CHECK (rmode !=_isnextn && rmode !=_isprevn, "_isnextn and _isprevn not supported in cisread");

  TString256 keystr;
  char* key = keystr.get_buffer();
  
  int err = NOERR ;
  do
  {
    if (rmode>=_isequal && rmode<=_isgteq)
    {   
      const RecDes* r = record.rec_des();
      err=__build_key(r, knum, record.string(),key,TRUE);
      if (err == NOERR)
      {
        err = DB_seek(fhnd,key); 
        if (err == NOERR && rmode == _isgreat)  
          err = DB_next(fhnd);
        if (err != NOERR) 
          err = get_error(err);
      }
      if (rmode != _isequal && err == _iskeynotfound) 
        err = NOERR;
    }
    else
    {
      if (rmode==_isfirst)   
        err=DB_first(fhnd);
      else
        if (rmode==_islast)
          err=DB_last(fhnd);
        else
          if (rmode==_isnext)
          {
            if (curr_recno != DB_recno(fhnd))
            {
              RecDes* r = record.rec_des();
              err = __build_key(r, knum, record.string(),key,TRUE);
              if (err == NOERR)
              {
                err = DB_seek(fhnd,key);
                err = get_error(err);
                if (err != NOERR && err != _iskeynotfound)
                  fatal_box("Errore nella next %d : non posso riposizionarmi", err);
                else
                  if (err == NOERR)
                    err=DB_next(fhnd);
              }                         
            }
            else
              err=DB_next(fhnd);
          }
          else
            if (rmode==_isprev)
            {
              if (curr_recno != DB_recno(fhnd))
              {
                RecDes* r = record.rec_des();
                err = __build_key(r, knum, record.string(),key,TRUE);
                if (err == NOERR)
                {
                  err = DB_seek(fhnd,key);
                  err = get_error(err);
                  if (err != NOERR && err != _iseof)
                    fatal_box("Errore nella next %d : non posso riposizionarmi", err);
                  else
                    if (err == NOERR)
                      err=DB_prev(fhnd);
                }
              }
              else
                err=DB_prev(fhnd);
            }
            else
              if (rmode==_iscurr)
                err=DB_go(fhnd,DB_recno(fhnd));  
      if (err != NOERR) 
        err=get_error(err);       
    }
    
    if (err == _iseof)
      DB_last(fhnd);
    if (err == NOERR && (lmode == _lock || lmode == _testandlock))   // _lock e _testandlock
    {
      err=DB_lock(fhnd);
      if (err != NOERR) 
        err = get_error(err);
      if (err == _islocked && lmode == _testandlock) 
        break;
    }
    if (err == _islocked)
    {
      RecDes* r = record.rec_des();
      record = (const char *) DB_getrecord(fhnd);
      __build_key(r, knum, record.string(), key, TRUE);
      message_box("Codice %s in uso da parte\ndi un altro utente.", key);
    } 
  } while (err ==_islocked);  

  if (err == NOERR && lmode == _unlock)            
  {
    err=DB_unlock(fhnd);  
    if (err != NOERR) 
      err = get_error(err);
  }

  curr_recno = DB_recno(fhnd);
  record = (const char *)DB_getrecord(fhnd);

  return err;
}

////////////////////////////////////////////////////////////////////////////////////////////////////
// Funzioni implementate per la gestione file dati tramite Codebase
////////////////////////////////////////////////////////////////////////////////////////////////////
// Fine(@)

// @doc EXTERNAL

// @func Setta il valore della variabile <p __autoload>
void set_autoload_new_files(
     bool on) // @parm Valore da assegnare

// @comm Il valore di <p __autoload> indica il caricamento dei valori standard dei file

{
  __autoload = on;
}

///////////////////////////////////////////////////////////
// TExtrectype
///////////////////////////////////////////////////////////

class TExtrectype : public TVariable_rectype
{         
  RecDes* _rd;

protected: // TRectype
  virtual RecDes* rec_des() const { return _rd; }
  virtual bool auto_virtual_fields() const { return TRUE; }

public:

  TExtrectype(const TTrec& r);  // Costruisce il record a partire da r
  virtual ~TExtrectype() {}
};

TExtrectype::TExtrectype(const TTrec& r) : TVariable_rectype(r.num())
  
{
  delete _rec;
  _length = r.len();
  _rec = new char [ _length ];
  _rd = r.rec();
  if( rec_has_memo(r.rec()))
    init_memo(RECORD_NON_FISICO );
  zero();
}


///////////////////////////////////////////////////////////
// TBaseisamfile
///////////////////////////////////////////////////////////

TBaseisamfile::TBaseisamfile(int logicnum)
{
  _logicnum = logicnum;
  _isam_handle = 0;
  _curr_key = 0;
  _lasterr = NOERR;
  _current = new TRectype(this);
}

// @doc EXTERNAL

// @mfunc Reperisce il tracciato dal file stesso.
//
TBaseisamfile::TBaseisamfile(
    const char* name, int mode, bool index) // @parm Indica il nome del file
// @comm Esiste la possibilita' di codificare i valori di pathpref e prefix in <p name>
// %  si riferisce ai dati comuni
// $  si riferisce ai dati di ditta corrente
// #  si riferisce al direttorio indicato da PATHPREF.INI
{
  _lasterr = NOERR;
  TFilename filename(name);
  
// Espande il nome!
  const char c = filename[0];
  if (c == '%' || c == '$')
    filename = CAddPref(filename.get_buffer());
  else
    if (c == '#')
    {
      filename.ltrim(1);
      filename.format("%s/%s",__ptprf,(const char*)filename);
    } 
  _logicnum = LF_EXTERNAL;
  _isam_handle = prefix().open_isamfile(_logicnum, filename, mode == _excllock, index);
  _current = new TRectype(this);
}

TBaseisamfile::~TBaseisamfile()
{
  if (_current)
    delete _current;
}

TCodeb_handle TBaseisamfile::handle(int key) const
{
  return prefix().get_handle(_isam_handle, key > 0 ? key : _curr_key);
}

long TBaseisamfile::items() const
{                  
  return DB_reccount(handle());
}

const char* TBaseisamfile::name() const
{     
  sprintf(_isam_string, "%d", num());
  return _isam_string;
}

const char* TBaseisamfile::filename() const
{                                     
  const int n = _isam_handle > 0 ? _isam_handle : num();
  const FileDes& d = prefix().get_filedes(n);
  strcpy(_isam_string, d.SysName);
  strcat(_isam_string, ".dbf");
  return _isam_string;
}

const char* TBaseisamfile::description()
{
  const int n = _isam_handle > 0 ? _isam_handle : num();
  const FileDes& d = prefix().get_filedes(n);
  return d.Des;
}

TRecnotype TBaseisamfile::eod() const
{
  return items();
}                                         

void TBaseisamfile::set_curr(TRectype * curr)
{ 
  CHECK(curr != NULL, "You must set a valid current record");
  CHECK(num() == curr->num(), "You must set a coherent current record");
  if (_current != NULL)
    delete _current;
  _current = curr;                     
}

void TBaseisamfile::setkey(int nkey)
{
  _curr_key = nkey;
}

int TBaseisamfile::getkey() const
{
  return _curr_key;
}

int TBaseisamfile::first(word lockop)
{
  return TBaseisamfile::read(curr(), _isfirst, lockop);
}

int TBaseisamfile::last(word lockop)
{
  return TBaseisamfile::read(curr(), _islast, lockop);
}

int TBaseisamfile::next(word lockop)
{
  return TBaseisamfile::read(curr(), _isnext, lockop);
}

int TBaseisamfile::prev(word lockop)
{
  return TBaseisamfile::read(curr(), _isprev, lockop);
}

int TBaseisamfile::reread(word lockop)
 
{
  return TBaseisamfile::reread(curr(), lockop);
}

int TBaseisamfile::reread(TRectype& rec, word lockop)
{
  return rec.read(*this, _iscurr, lockop);
}

int TBaseisamfile::skip(TRecnotype nrec, word lockop)
{   
  if (!nrec) return NOERR;
  curr().setdirty();  

  const int fhnd = handle();

  // controllo se mi sono spostato dall'ultima lettura
  if (_recno != DB_recno(fhnd))
  {
    _lasterr = DB_go(fhnd, _recno);
    if (_lasterr != NOERR)
    { 
      _lasterr = get_error(_lasterr);
      if (_lasterr != _islocked)
        fatal_box("Errore nella skip %d : non posso riposizionarmi", _lasterr);
    }
  }
  _lasterr=DB_skip(fhnd, nrec);
  if (_lasterr != NOERR) 
    _lasterr = get_error(_lasterr);
  while (_lasterr ==_islocked) 
  { 
    const RecDes& r = prefix().get_recdes(num());
    TString key(128);
    __build_key(&r, _curr_key, curr().string(), key.get_buffer(), TRUE);
    message_box("Codice %s in uso da parte\ndi un altro utente.", (const char*)key);
    _lasterr = cisread(fhnd, getkey(), curr(),_iscurr + lockop, _recno);
  } 
  
  if (curr().has_memo())
    curr().init_memo(_recno);
  
  return _lasterr;
}

// funzione  di lettura dei file
int TBaseisamfile::_read(TRectype& rec, word op, word lockop)
{
  const TCodeb_handle fhnd = handle();
  rec.setdirty();
  _lasterr=cisread(fhnd, getkey(), rec, op + lockop, _recno);
  if(rec.has_memo())
    rec.init_memo(_recno);
  if (lockop && _lasterr == NOERR)
  {
    if (lockop == _lock)
      prefix().lock_record(_isam_handle, _recno);
    if (lockop == _unlock)
      prefix().unlock_record(_isam_handle, _recno);
  }
  return _lasterr;
}

int TBaseisamfile::read(TRectype& rec, word op, word lockop)
{
  _lasterr=rec.read(*this, op, lockop);
  return _lasterr;
}

int TBaseisamfile::read(word op, word lockop)
 
{
  return TBaseisamfile::read(curr(), op, lockop);
}

int TBaseisamfile::readat(TRectype& rec, TRecnotype nrec, word lockop)
{
  return rec.readat(*this, nrec, lockop);
}

int TBaseisamfile::readat(TRecnotype nrec, word lockop)
{
  return TBaseisamfile::readat(curr(), nrec, lockop);
}

int TBaseisamfile::_readat(TRectype& rec, TRecnotype nrec, word lockop)
{
  const int fhnd = handle();
  rec.setdirty();
  _lasterr=DB_go(fhnd,nrec);                             
  if (_lasterr != NOERR) 
    _lasterr = get_error(_lasterr);
  else
    rec = (const char *) DB_getrecord(fhnd);
  _recno = DB_recno(fhnd);
  if(rec.has_memo())
    rec.init_memo(_recno);
  return _lasterr;
}


int TBaseisamfile::_write(const TRectype& rec)
{
  CHECK(!rec.empty(), "Can't write an empty record");

#ifdef _DEMO_
  
  if ((num() > LF_COMUNI && num() < LF_ANALISI) || num() > LF_RELANA)
  {
    if (items() > 979L)
      return _isfilefull;
  }
#endif

  // Forza l'uso della chiave principale (per chiavi duplicate?)
  const int fhnd = handle(1);
  
  const int dst_len = DB_reclen(fhnd);
  if (dst_len != rec.len())
    NFCHECK("Record size mismatch on file %d: RecDes=%d, DB_reclen=%d", 
            _logicnum, rec.len(), dst_len);

  browse_null(rec.string(), dst_len);
  memcpy(DB_getrecord(fhnd), rec.string(), dst_len);           
  _lasterr = DB_add(fhnd);
  if (_lasterr != NOERR) _lasterr = get_error(_lasterr);
  
  _recno = DB_recno(fhnd);
  if (_lasterr == NOERR && rec.has_memo())
    ((TRectype &)rec).write_memo( fhnd, _recno );
  return _lasterr;
}

int TBaseisamfile::write(const TRectype& rec)
{
  return rec.write(*this);
}


int TBaseisamfile::write()
{                 
  return TBaseisamfile::write(curr());
}

int TBaseisamfile::_rewrite(const TRectype& rec)
{
  CHECK(!rec.empty(), "Can't write an empty record");

  TRectype save_rec(rec);

  // Forza l'uso della chiave principale (per chiavi duplicate?)
  const int fhnd = handle(1);
  _lasterr = cisread(fhnd, 1, save_rec, _isequal + _nolock, _recno); // Si Posiziona per sicurezza...
  
  if (_lasterr == NOERR)
  {
    const int len = DB_reclen(fhnd);
    if (len != save_rec.len())
      NFCHECK("Record size mismatch on file %d: RecDes=%d, DB_reclen=%d", 
              _logicnum, save_rec.len(), len);

    browse_null(rec.string(), len);
    if (memcmp(rec.string(), save_rec.string(), len) != 0)
    {
      memcpy(DB_getrecord(fhnd), rec.string(), len); 
      _lasterr = DB_rewrite(fhnd);
      if (_lasterr != NOERR) 
        _lasterr = get_error(_lasterr);
    }
    else
      DB_unlock(fhnd);  
    _recno = DB_recno(fhnd);
    if(_lasterr == NOERR && curr().has_memo( ))
      ((TRectype &)rec).write_memo( fhnd, _recno );
  }    
  return _lasterr;
}

int TBaseisamfile::rewrite(const TRectype& rec)
{
  return rec.rewrite(*this);
}

int TBaseisamfile::rewrite()
{
  return TBaseisamfile::rewrite(curr());
}

int TBaseisamfile::rewriteat(const TRectype& rec, TRecnotype nrec)
{
  const int fhnd = handle();

  if ((_lasterr=DB_go(fhnd,nrec))== NOERR)
  {                                      
    browse_null(rec.string(),DB_reclen(fhnd));
    memcpy(DB_getrecord(fhnd),rec.string(),DB_reclen(fhnd));
    _lasterr=DB_rewrite(fhnd);
    if (_lasterr != NOERR) _lasterr = get_error(_lasterr);
  } else
    _lasterr = get_error(_lasterr);
  _recno = DB_recno(fhnd);
  if(_lasterr == NOERR && curr().has_memo( ))
    ((TRectype &)rec).write_memo( fhnd, _recno );
  return _lasterr;
}

int TBaseisamfile::rewriteat(TRecnotype nrec)
{
  return TBaseisamfile::rewriteat(curr(),nrec);
}


int TBaseisamfile::_remove(const TRectype& rec)
{
  CHECK(!rec.empty(), "Can't remove an empty record");

  const int fhnd = handle(1);
  memcpy(DB_getrecord(fhnd),rec.string(),DB_reclen(fhnd)); 
  if ((_lasterr=cisread(fhnd, 1, (TRectype&)rec, _isequal + _nolock, _recno))==NOERR)
  {
    _lasterr = DB_delete(fhnd);   // Put only deletion flag on record, must remove keys too!
    if (_lasterr != NOERR)         
    {
      _lasterr = get_error(_lasterr);
      DB_recall(fhnd);
    }
  }

  if(_lasterr == NOERR && curr().has_memo())
    curr().memo_recno();

  return _lasterr;
}

int TBaseisamfile::remove(const TRectype& rec)
{
  return rec.remove(*this);  
}

int TBaseisamfile::remove()
{
  return TBaseisamfile::remove(curr());
}

int TBaseisamfile::lock()
{
  const int fhnd = handle();
  _lasterr = DB_lockfile(fhnd);
  if (_lasterr != NOERR) 
    _lasterr = get_error(_lasterr);
  return _lasterr;
}

int TBaseisamfile::unlock()  
{
  const int fhnd = handle();
  _lasterr = DB_unlock(fhnd);
  if (_lasterr != NOERR) 
    _lasterr = get_error(_lasterr);
  return (_lasterr);
}

void TBaseisamfile::indexon()
{
}

void TBaseisamfile::indexoff()
{
}

bool TBaseisamfile::empty()
{ 
  return items() <= 0;
}


// @doc EXTERNAL

// @mfunc Apre il file isam di base con lock
//
// @rdesc Ritorna NOERR se e' riuscita ad aprire il file, altrimenti ritorna il numero di errore
//    generato (vedi <t TIsamerr>).
int TBaseisamfile::_open(
    unsigned int mode,  // @parm Indica il modo di apertura del file (default _manulock)
    bool index)         // @parm Indica se aprire con indici o meno  (default TRUE)

// @comm Il parametro <p mode> puo' assumere i valori:
//
// @flag _manulock | Il lock dei record viene fatto manualmente
// @flag _exclock | Il file viene aperte in modo esclusivo
// @flag _autolock | Il lock dei record viene fatto in modo automatico
// @comm Il parametro <p index> puo' assumere i valori:
//
// @flag TRUE  | Il file viene aperto con indici
// @flag FALSE | Il file viene aperto senza indici
  
{
  CHECKD(_isam_handle == 0, "Can't reopen file ", _logicnum);
  _curr_key = index ? 1 : 0;

  TFilename filename;
  _isam_handle = prefix().open_isamfile(_logicnum, filename, mode==_excllock, index);
  if (_isam_handle > 0)
  {                       
    _recno = RECORD_NON_FISICO;
    _lasterr = NOERR;
  }  
  else            
  {   
    TString e_msg;
    _lasterr = get_error(_isam_handle);
    if (_lasterr == -60)
    {
      if (!filename.exist())
        e_msg.format("Il file %d(%s) non esiste, errore %d",num(),(const char*)filename,_lasterr);
      else
        e_msg.format("Il file %d(%s) e' aperto in modo esclusivo da un'altra applicazione",
                     num(), (const char*)filename);
    }
    if (e_msg.empty())
      e_msg.format("Il file %d(%s) non puo' essere aperto, errore %d",num(),(const char*)filename,_lasterr);
    fatal_box((const char*) e_msg);
  }
  return _lasterr;
}

int TBaseisamfile::_open_ex(
    unsigned int mode,  // @parm Indica il modo di apertura del file (default _manulock)
    bool index)         // @parm Indica se aprire con indici o meno  (default TRUE)

// @comm Il parametro <p mode> puo' assumere i valori:
//
// @flag _manulock | Il lock dei record viene fatto manualmente
// @flag _exclock | Il file viene aperte in modo esclusivo
// @flag _autolock | Il lock dei record viene fatto in modo automatico
// @comm Il parametro <p index> puo' assumere i valori:
//
// @flag TRUE  | Il file viene aperto con indici
// @flag FALSE | Il file viene aperto senza indici
  
{
  CHECKD(_isam_handle == 0, "Can't reopen file ", _logicnum);
  _curr_key = index ? 1 : 0;

  TFilename filename;
  _isam_handle = prefix().open_isamfile(_logicnum, filename, mode==_excllock, index);
  if (_isam_handle > 0)
  {                
    if (prefix().get_reclen(_logicnum) > 0)
    {
      const int fhnd = handle();
      if (fhnd >= 0)
      {
        _recno = RECORD_NON_FISICO;
        _lasterr = NOERR;
      }
      else
        _lasterr = get_error(fhnd);
    }
    else
      _lasterr = _isbadtrc;
  }  
  else            
  {
    _isam_handle = 0;
    _lasterr = get_error(_isam_handle);
  }
  return _lasterr;
}

int TBaseisamfile::_close()
{
  int err = prefix().close_isamfile(_isam_handle);
  setstatus(err);
  return err;
}

int TBaseisamfile::is_valid()
{ // Ritorna NOERR se il file puo' essere aperto senza errori
  CHECKD(_isam_handle == 0, "Can't reopen file ", _logicnum);
  TFilename filename;
  TIsam_handle isam_handle = prefix().open_isamfile(_logicnum, filename, FALSE, TRUE);
  int err= isam_handle > 0 ? prefix().get_handle(isam_handle,1) : -60;
  if (err < 0)
    err = get_error(err);
  else
  {
    if (prefix().get_reclen(_logicnum) > 0)
      err = NOERR;
    else
      err = _isbadtrc;
  }
  if (isam_handle > 0)
    prefix().close_isamfile(isam_handle);
  return err;
}

///////////////////////////////////////////////////////////
// TLocalisamfile
///////////////////////////////////////////////////////////

// @doc EXTERNAL

// @mfunc Costruttore
//
// @rdesc Ritorna l'oggetto <c TLocalisamfile>
TLocalisamfile::TLocalisamfile(
                int logicnum)     // @parm Numero del logico del file
              : TBaseisamfile(logicnum)
{             
  if (open() != NOERR)
    fatal_box("Impossibile aprire il file %d", logicnum);
}

// @mfunc Costruttore
//
// @rdesc Ritorna l'oggetto <c TLocalisamfile>
TLocalisamfile::TLocalisamfile(
                const char* name,     // @parm Nome del file esterno da aprire
                int mode,
                bool index)
: TBaseisamfile(name, mode, index)
{
}

TLocalisamfile::TLocalisamfile(int logicnum, bool tmpfile)
              : TBaseisamfile(logicnum)
{
  CHECK(tmpfile == TRUE, "Protected constructor badly used");
}
 

TLocalisamfile::~TLocalisamfile()
{         
  close();
}


int TLocalisamfile::close()
{
  return TBaseisamfile::_close();
}

int TLocalisamfile::open(unsigned int mode)
{
  return TBaseisamfile::_open(mode);
}

int TLocalisamfile::operator +=(const TRecnotype npos)
{ 
  skip(npos);
  return status();
}


int TLocalisamfile::operator -=(const TRecnotype npos)
{
  skip(-npos);
  return status();
}


int TLocalisamfile::operator ++()
{
  next();
  return status();
}


int TLocalisamfile::operator --()
{
  prev();
  return status();
}



TIsamfile::TIsamfile(int logicnum) 
         : TBaseisamfile(logicnum) 
{ }


TIsamfile::~TIsamfile()
{
  close();
}


/*

// @doc EXTERNAL

// @mfunc Aggiorna i flags associati al file
//
// @rdesc Ritorna NOERR se e' riuscita ad eseguire l'operazione, altrimenti ritorna il numero 
//    di errore generato (vedi <t TIsamerr>).
int TIsamfile::flags(
    bool updateeod) // @parm Indica se aggiornare anche l'EOD del file
  
{
  if (num() <= 0) 
    return NOERR ;

  TDir d;
  const TDirtype dirtype = prefix().get_dirtype(_filename);
  d.get(num(), _lock, dirtype);
  int err = d.status(dirtype);
  if (err == NOERR)
  {
    const FileDes& fd = prefix().get_filedes(_filename);
    d.flags() = fd.Flags;
    if (updateeod) 
      d.eod() = fd.EOD;
    d.put(num(), dirtype);
  }
  setstatus(err);
  return err;
}

*/

///////////////////////////////////////////////////////////
// TIsamtempfile
///////////////////////////////////////////////////////////

TIsamtempfile::TIsamtempfile(int logicnum, const char* radix, bool create, bool autodel)
             : TLocalisamfile(logicnum, TRUE) 
{                             
  TRecnotype eod = 0;
  TRecnotype eox = 100;

  TFilename n; 
  
  if (radix && *radix)
  {
    if (*radix == '%') 
      n = radix + 1;
    else
    {
      n.tempdir(); 
      n << SLASH << radix; 
    }
    n.ext("dbf");
  }  
  else
    n.temp(NULL, "dbf");
  
  if (!create)
  {      
    TDir dir; dir.get(logicnum);
    const word& len = dir.len();  

    FILE* f = fopen(n, "rb");
    if (f == NULL)
      fatal_box("Impossibile aprire il file temporaneo %s: %s",(const char*) n,(const char*)_strerror(NULL));

    fseek(f, 0, SEEK_END);
    eod = eox = ftell(f) / len;
    fclose(f);
  }
  
  CHECK(create == FALSE || create == TRUE, "Il flag di autodel ora si setta con il terzo parametro del costruttore");
  _autodel = autodel || (create != FALSE && create != TRUE);

  n.insert("%", 0);

  open(n, create, eod, eox);
}


TIsamtempfile::~TIsamtempfile()
{
  close();
}

// @doc EXTERNAL

// @mfunc Apre il file
//
// @rdesc Ritorna NOERR se e' riuscita ad aprire il file, altrimenti ritorna il numero di errore
//    generato (vedi <t TIsamerr>).
int TIsamtempfile::open(
    const char* radix,  // @parm Radice del path del file
    bool create,  // @parm Indica se va creatoun nuovo file (se FALSE il file esiste gia')
    TRecnotype eod,   // @parm Numero di record presenti nel file
    TRecnotype eox) // @parm Numero di record da aggiungere al file

// @comm Nel case <p create> sia TRUE allora viene settato automaticamente il valore di <p _autodel>
//   a TRUE, cioe' viene abilitata l'eliminazione del file in chiusura.
  
{
  int err = NOERR;
  
  TFilename filename;
  if (radix[0] == '%')
    filename << &radix[1] ;
  else
    filename.temp(radix);
  filename.ext("");  

  CHECKS(_isam_handle == 0, "File already open ", (const char*)filename);

  if (create)
  {
    RecDes* r = (RecDes*)&prefix().get_recdes(num());
    err = DB_build(filename, r) ;
    if (err != NOERR) 
    {                 
      err = get_error(err);     
      fatal_box("Can't create temp file '%s' num. %d: Error n. %d", (const char*)filename, num(), err);
    }
  }

  _isam_handle = prefix().open_isamfile(_logicnum, filename);
  TCodeb_handle fhnd = handle(_curr_key = 1);
  if (fhnd < 0) 
    err = get_error(fhnd);
  if (err != NOERR)
  {
    filename.ext("dbf");
    if (err == -60)
    {
      if (!filename.exist()) // check for existance
        fatal_box("Apertura file %s : errore n. %d. File non esistente.",(const char*)filename,err);
      else
        fatal_box("Apertura file %s : errore n. %d. File aperto in uso esclusivo da un'altra applicazione.",(const char*)filename,err);
    }
    else 
      fatal_box("Apertura file %s : errore n. %d ",(const char*)filename,err);
  }

  _recno = RECORD_NON_FISICO;
  setstatus(err);
  return err;
}


int TIsamtempfile::close()
{
  TFilename f = filename();
  int err = prefix().close_isamfile(_isam_handle);
  if (err == NOERR && _autodel)
  {
    long c = DB_getconf();

    f.ext("dbf");
    ::remove(f);
    if (c & 1)                                // FOXPRO format
      f.ext("cdx"); 
    if (c & 4)                                // DBIV format
      f.ext("mdx");
    if (c & 8 || c & 2)                       // CLIPPER and DBIII format
    {
      f.ext("cgp");
      FILE *fp=fopen((const char*)f,"r");
      char in[16];
      while (fgets(in,16,fp)!=NULL)
      {
        TFilename a(in);
        if (c & 8)                    // DBIII format
          a.ext("ndx");
        else
          a.ext("ntx");       // CLIPPER format
        ::remove((const char *)a);
      }
      fclose(fp);
    }
    ::remove(f);        
  }

  setstatus(err);
  return err;
}

///////////////////////////////////////////////////////////
// TExternisamfile
///////////////////////////////////////////////////////////
TExternisamfile::TExternisamfile(const char* name, int mode, bool index)
: TLocalisamfile(name, mode, index) 
{
}

TExternisamfile::~TExternisamfile()
{
  _close();
}

const char* TExternisamfile::name() const
{     
  return filename();
}

///////////////////////////////////////////////////////////
// TSystemisamfile
///////////////////////////////////////////////////////////

int TSystemisamfile::build(TRecnotype eox, const TTrec& r)
{
  int err=NOERR;
  TDir d;
  d.get(num());
  CHECK(r.len() != 0, "Can't create a file with empty field info");

  TFilename f(filename());

  TFilename fname(f); fname.ext("");  // sostituto per _filename

  f = f.path(); if (!is_not_slash(f.right(1)[0])) f.rtrim(1);
  if (!fexist(f)) 
    make_dir(f);
  if (r.len() != 0)
  {  
    err=DB_build(fname,r.rec());
    if (err != NOERR) 
      err = get_error(err);
    setstatus(err);
    
#ifndef FOXPRO  
    if (err == NOERR && __autoload)
    {
      TFilename lf;  
      lf.format("%sstd/lf%04d.txt", __ptprf, num());
      if (fexist(lf))
        load(lf, '|', '\0', '\n', TRUE, TRUE);
    }
#endif
  }
  return err;
}

int TSystemisamfile::build(TRecnotype eox)
{
  TTrec r;
  r.get(num());
  return build(eox,r);
}


int TSystemisamfile::extend(TRecnotype eox)
  
{
  int err = NOERR;
  return err;
}


long TSystemisamfile::size(TRecnotype eox)
{
  return 51200L;
}

#ifndef FOXPRO

// @doc INTERNAL

// @mfunc Esegue la conversione del file
//
// @rdesc Ritorna il rusultato dell'operazione
//
// @flag TRUE | Se la conversione e' stata effettuata correttamente
// @flag FALSE | Se h stato rilevato un errore durante la conversione (viene emesso un <f error_box>)
int TSystemisamfile::exec_convapp(
     long flev,   // @parm Livello a cui aggiornare l'archivio
     const bool before) // @parm Indica se viene chiamata prima o dopo la conversione
  
{
  const char * const v = before ? "BCNV" : "ACNV";
  int err = 0;

  if (flev == 0) flev = 199401;
  else flev++;
  
  TConfig conv(CONFIG_FCONV);
  TString16 paragraph; 
  
  TString_array paralist; 
  conv.list_paragraphs(paralist);
  
  for (long l = flev; err == 0 && l <= get_std_level(); l++)
  {
    paragraph.format("%06ld", l);
    if (paralist.find(paragraph) < 0)
      continue;
    if (conv.set_paragraph(paragraph) && conv.exist(v, num()))
    {
      TToken_string s(conv.get(v, NULL, num()), ' ');
      TFilename f(s.get(0));
      f.ext(".exe");
      s << " " << prefix().get_codditta();
      TExternal_app app(s);
      if (f.exist())
      {
        err = app.run(FALSE, 0x3);    // Synchronous Spawn with User
        TMailbox mail;
        TMessage* msg = mail.next(TRUE);
        if (err == 0 && msg != NULL)
          err = atoi(msg->body());
      }
      if (err && err != 8)
        return error_box("Impossibile eseguire il programma di %sconversione\ndel livello %ld/%ld\nErrore n.ro %d", before ? "pre" : "post", l / 100, l % 100, err); 
    }
  }
  return err;
}

// @doc INTERNAL

// @mfunc Recupera le conversioni logiche da effettuare sul file
//
// @rdesc Ritorna TRUE se occorre effettuare la conversione sul file
bool TSystemisamfile::getlcf(
     long flev)  // @parm livello archivi di partenza della convesione
     
// @comm Recupera le conversioni logiche da effettuare sul file per per passare dal
//       livello archivi <p flev> a quello attuale degli archivi standard.
  
{
  _flds.destroy();
  _exps.destroy();
  if (flev == 0) flev = 199401;
  else flev++;

  TConfig conv(CONFIG_FCONV);
  TString16 paragraph; 
  
  TString_array paralist; 
  conv.list_paragraphs(paralist);

  for (long l = flev; l <= get_std_level(); l++)
  {
    paragraph.format("%06ld", l);
    if (paralist.find(paragraph) < 0)
      continue;
    
    if (conv.set_paragraph(paragraph) && conv.exist("F", num()))
    {
      TToken_string exprline(conv.get("F", NULL, num()));
      
      if (exprline.empty()) return FALSE;

      TToken_string w("", '=');
      const char * wexprs = exprline.get();

      while (wexprs != NULL)
      {
        w = wexprs;
        TFixed_string fld(w.get());
        _flds.add(new TFieldref(fld, 0));
        _exps.add(new TExpression(w.get(), _strexpr));
        wexprs = exprline.get();
      }
    }
  }
  return _flds.items() > 0;
}

void TSystemisamfile::makelc(TRectype& rec)
{
  for (int i = 0 ; i < _flds.items(); i++)
  {
    TFieldref& f = (TFieldref&) _flds[i];
    TExpression& e = (TExpression & )_exps[i]; 

    for (int k = 0; k < e.numvar(); k++)
      e.setvar(k, get(e.varname(k)));
    f.write(e, rec);
  }
}

// @doc EXTERNAL

// @mfunc Esegue la conversione del tracciato record del file
//
// @rdesc Ritorna il risulato della conversione, altrimenti il codice di errore generato 
//        (vedi <t TIsamerr>)

int TSystemisamfile::update(
    const TTrec& newrec, // @parm Nuovo tracciato record con cui aggiornare il file
    bool vis)      // @parm Indica se visualizzare lo stato dell'operazione
  
{        
  CHECK(newrec.len() != 0, "Can't update file with empty field info");
  int err = NOERR;
  
  TTrec wrec(newrec);
  TDir dir;

  dir.get(num(), _unlock, _nordir, _sysdirop);
  const bool is_com = prefix().is_com();
  const bool toconvert = is_com ? dir.is_com() : dir.is_firm();

  TTrec  oldrec;
  oldrec.get(num());

  const int lenr = wrec.len();

  if (lenr != 0)
  {
    const long lev = prefix().filelevel();
    const bool lcf = getlcf(lev);

    if (toconvert)
    {
      err = exec_convapp(lev, TRUE);  // Pre-conversion
      if (err != NOERR)
      {
        setstatus(err);
        return err;
      }
    
      if (!lcf && wrec == oldrec)
      {
        err = exec_convapp(lev, FALSE); // Post-conversion
        setstatus(err);
        return err;
      }
    }
    else
    {
      if (dir.eox() > 0L)
      {
        dir.eod() = 0L; 
        dir.eox() = 0L;
      }
    }

    TFilename fname;
    if (toconvert)
      fname = filename();

    if (toconvert && (dir.eox() > 0L || fname.exist()))
    {
      TRecnotype ni = 0L;     
      TFilename tmpfname; tmpfname.temp("tf");  
      
      err = _open_ex(_excllock);
      if (err != NOERR) 
        return err;

      err=DB_build(tmpfname, wrec.rec());
      if (err != NOERR) 
      {
        err=get_error(err);
        return (err);
      }

      // Apro il file destinazione in modo esclusivo e senza indici
      int tmpnum = num();
      TIsam_handle ishandle = prefix().open_isamfile(tmpnum, tmpfname, TRUE, FALSE);
      TCodeb_handle fhnd = prefix().get_handle(ishandle);
      if (fhnd < 0 ) 
      {
        err=get_error(fhnd);
        return err;
      }
    
      TString s(80);
      s.format("Aggiornamento archivio %s\nTempo stimato alla fine del processo: ", (const char*) fname);

      const TRecnotype nitems = items();
      TProgind p(nitems > 0 ? nitems : 1, s, FALSE, TRUE, 70);

      TExtrectype nrec(wrec);

      const int nflds = curr().items();
      TArray infld, outfld;
      for (int j = 0; j < nflds; j++)
      {
        const char* fld_name = curr().fieldname(j);
        infld.add(new TRecfield(curr(), fld_name), j);
        if (nrec.exist(fld_name))
          outfld.add(new TRecfield(nrec, fld_name), j);    
      }

      const clock_t start_time = clock();
      for (first(); good(); next())
      {
        const bool tick = p.addstatus(1);
        ni++;

        if (curr().isdeleted())
          continue;

        nrec.zero();
        for (j = outfld.first(); j < nflds; j = outfld.succ(j))
        {
          TRecfield& in_fld = (TRecfield&)infld[j];
          TRecfield& out_fld = (TRecfield&)outfld[j];
          const char* fld_val = in_fld;
          out_fld = fld_val;
        }
        if (lcf)
          makelc((TRectype &)nrec);
        browse_null(nrec.string(),lenr/*DB_reclen(fhnd)*/); 
        memcpy(DB_getrecord(fhnd),nrec.string(),lenr/*DB_reclen(fhnd)*/);  
        err=DB_add(fhnd);
        if ( err == NOERR && nrec.has_memo())
          nrec.write_memo(fhnd, DB_recno(fhnd)); 
        if (err != NOERR) 
          err=get_error(err);
        setstatus(err);

        if (tick)
        {
          const clock_t elapsed_ticks = clock() - start_time;
          const clock_t total_ticks = elapsed_ticks * nitems / ni;
          const clock_t estimated_ticks = total_ticks - elapsed_ticks;
          long secs = estimated_ticks / CLOCKS_PER_SEC;
          CHECK(secs >= 0, "Bad time estimation");
          const int hours = int(secs / 3600L);
          secs %= 3600L;
          const int mins = int(secs / 60L);
          secs %= 60L;
          const int append_pos = s.find("o: ")+3;
          s.cut(append_pos);
          s << format("%02d:%02d:%02ld", hours, mins, secs);
          p.set_text(s);
        }
      }
      close();
      prefix().close_isamfile(ishandle);

      if (err!=NOERR) err=get_error(err);

      p.setstatus(nitems);
      if (err == NOERR)
      {           
        long c = DB_getconf();
        fname.ext("dbf");
        tmpfname.ext("dbf");
        fcopy(tmpfname, fname);
        ::remove(tmpfname);
        if (c & 1)
          tmpfname.ext("fpt");
        else
          tmpfname.ext("dbt");
        if (tmpfname.exist())
        {
          if (c & 1)
            fname.ext("fpt");
          else
            fname.ext("dbt");
          fcopy(tmpfname, fname);
          ::remove(tmpfname);
        }
        if (c & 1)                        // FOXPRO format
          tmpfname.ext("cdx");
        if (c & 4)                        // DBIV format
          tmpfname.ext("mdx");
        if (c & 8 || c & 2)
        {                   
          tmpfname.ext("cgp");
          TFilename a;    
          FILE *fp=fopen(tmpfname,"rb");
          while (fgets(a.get_buffer(),16,fp) != NULL)
          {
            a.rtrim(1); // Cut \n
            if (c & 8)                    // DBIII format
              a.ext("ndx");
            else
              a.ext("ntx");       // CLIPPER format
            ::remove(a);
          }
          fclose(fp);
        }
        ::remove(tmpfname);            
        dir.eod() = ni;
      }
    }
    dir.set_len(lenr);
    dir.put(num(), _nordir, _sysdirop);
    wrec.put(num());
    prefix().update_recdes(num());

    if (toconvert)
    {
      if (dir.eox() > 0L) 
        packindex();
      if (err == NOERR)
        err = exec_convapp(lev, FALSE);  // Post - conversion
    }
  }

  setstatus(err);
  return err;
}

// @doc EXTERNAL

// @mfunc Rimuove fisicamente i record cancellati
//
// @rdesc Ritorna NOERR se l'operazione di compattamento e' riuscita, altrimenti il codice di
//    di errore generato (vedi <t TIsamerr>).
int TSystemisamfile::packfile(
    bool vis, // @parm Indica se visualizzare lo stato dell'operazione
    bool zap) // @parm Indica se distruggere tutti i records

// @xref <mf TSystemisamfile::packindex>
  
{
  int err=NOERR;  
  TDir d;
  
//  d.get(num(),_nolock, _nordir,_sysdirop);
  d.get(num(),_nolock, (d.is_com()) ? _comdir : _nordir);
  
//  CHECKS(filehnd() == NULL, "Can't pack open file", (const char*)filename());
  
  err=DB_packfile(vis, d.name(), zap ? 0L : d.eod());
  
  if (zap && err == NOERR)
    err = packindex(vis, FALSE);
  if (err == NOERR && curr().has_memo())
    err = DB_packmemo(vis,d.name());
  
  if (err != NOERR) 
  {
    err = get_error(err);
    if (err != NOERR) 
      error_box("Errore in compattamento dati.\nFile %d : %d", num(),err);
  }    
  setstatus(err);
  return err;
}

// @doc EXTERNAL

// @mfunc Rimuove fisicamente gli indici cancellati
//
// @rdesc Ritorna NOERR se l'operazione di compattamento e' riuscita, altrimenti il codice di
//    di errore generato (vedi <t TIsamerr>).
int TSystemisamfile::packindex(
    bool vis, // @parm Indica se visualizzare lo stato dell'operazione
    bool ask) // @parm Indica se chiedere il recupero dei record duplicati

// @xref <mf TSystemisamfile::packfile>
  
{
  int err=NOERR;
  TRecnotype peod;
  TTrec r;
  TDir  d;
  
  r.get(num());                
  d.get(num(),_nolock, _nordir,_sysdirop);               
  bool is_com = d.is_com();
  d.get(num(),_nolock, is_com ? _comdir : _nordir);
  err=DB_packindex(vis,d.name(),r.rec(),&peod,ask);
  if (err != NOERR) 
    err = get_error(err);
  if (err != NOERR) 
    error_box("Errore in compattamento indici.\nFile %d : %d", num(),err);
  else
    if (peod >= 0 && peod != d.eod())
    {
      d.eod() = peod;
      d.put(num(), is_com ? _comdir : _nordir);
    }
  setstatus(err);
  return err;
}

int TSystemisamfile::pack(bool vis, bool ask)
{
  int err=NOERR;
  if ((err=packfile(vis))==NOERR)
    err=packindex(vis,ask); 
  setstatus(err);       
  return err;
}

// @doc EXTERNAL

// @mfunc Importa un file ascii
//
// @rdesc Ritorna NOERR se l'operazione di lettura e' riuscita, altrimenti il codice di
//    di errore generato (vedi <t TIsamerr>).
int TSystemisamfile::load(
    const char* from, // @parm Nome del file da importare 
    char fs,    // @parm Carattere separatore di campo (default <pipe>)
    char fd,            // @parm Carattere delimitatore di campi (default '\\0')
    char rs,            // @parm Carattere separatore di record (default '\\n')
    bool vis,     // @parm Indica se visualizzare lo stato dell'operazione (default TRUE)
    bool extended)  // @parm Indica se interpretare alcune stringhe come macro (default FALSE)
    
// @comm Se <p extended> e' TRUE e trova alcune stringhe col formato %stringa% (es. %frm%)
//       ne sostituisce i valori (es. ditta corrente).
                                      
// @xref <mf TSystemisamfile::dump>
  
{
  int err=NOERR;
  FILE* fl = fopen(from, "r");
  if (fl == NULL) 
  {
    error_box("Impossibile aprire il file %s",from);
    return err = 2;
  }
  TRecnotype r = 0, e = 0, nitems = 0, nread = 0;
  TString16 firm, year, attprev("00000");

  if (extended)
  {
    TDate d(TODAY);
    TLocalisamfile ditte(LF_NDITTE);

    firm.format("%05ld", prefix().get_codditta());
    year.format("%04d", d.year());
    ditte.zero();
    ditte.put("CODDITTA", firm);
    if (ditte.read() == NOERR)
      attprev = ditte.get("CODATTPREV");
  }
  if (fl == NULL) 
  {                  // Come fa' ad arrivare qui, se fl non puo' essere NULL????
    clearerr(fl);
    setstatus(err);
    return err;      
  }
  char w[80];
  while ((fgets(w, 80, fl) != NULL))
  {
    if (strncmp(w, "[Data]", 6) == 0)
    {
      nitems = ftell(fl);
      break;
    }
  }
  fseek(fl, 0L, SEEK_END);
  nitems = ftell(fl) - nitems;
  fclose(fl);

  TFilename filename;
  TIsam_handle isam_handle = prefix().open_isamfile(_logicnum, filename);
  int fhnd = handle(isam_handle);
  if (fhnd < 0)
  {
    error_box("Impossibile aprire il file %s", (const char*)filename);
    return _isnotopen;
  }
  
  TScanner f(from);
  TToken_string s(1024, fs);
  bool fixedlen = (fs == '\0');
  int nflds = curr().items();
  TString_array  fld(nflds);
  int    len[MaxFields];
  TString sfd(3);
  TString s1(64);
  bool lcf = FALSE;

  if (f.paragraph("Header"))
  {       
    int equal;
    TString key;
    nflds = 0;
    while ((equal = f.line().find('=')) > 0)
    {
      key = f.token().left(equal);
      key.trim();
      if (key == "Version")
      {
        const long level = atol(f.token().mid(equal+1));
        if (level > prefix().filelevel())
          error_box("L'archivio %s e' stato generato con gli archivi di livello %ld%/%ld.\n Il livello attuale e' %ld/%ld.\n Convertire gli archivi e ripetere l' operazione.", 
                    from, level/100, level%100, get_std_level()/100, get_std_level()%100);
        lcf = getlcf(level);
      } else
      if (key == "File")
      {
        const int logic = atoi(f.token().mid(equal+1));
        if (logic != num())
          error_box("L'archivio %s e' stato generato dal file %d",
                     from, logic);
      } else
      if (key == "Fields")
      {                
        TToken_string riga = f.token().mid(equal+1);
        TToken_string wfd(32, ',');
        FOR_EACH_TOKEN(riga, fd)
        {
          wfd = fd; wfd.strip_spaces();
          fld.add(wfd.get(0));
          len[nflds] = wfd.get_int();
          nflds++;
        }
      }  
    }
  }
  
  if (nflds == 0 || fld.items() == 0)
  {   
    nflds = curr().items();
    for (int j = 0; j < nflds; j++)
    {
      fld.add(curr().fieldname(j), j);
      const TString & wfld = (const TString & ) fld[j];
      len[j] = (curr().type(wfld) == _datefld) ? 10 : curr().length(wfld);
    }
  }
  
  if (!f.paragraph("Data"))
  {
    error_box("Formato file non valido: manca il paragrafo [Data]");
    close();
    err = 1;
    setstatus(err);
    return err;
  }
  
  if (fd) sfd << fd;
  int last = NOERR;    
  
  s1.format("Imp. archivio %s\n%6ld records %6ld errori - %3d", (const char*)filename, r, e, last);
  TProgind p(nitems, s1, TRUE, TRUE, 70);
  for (s = f.line(); s.not_empty() && !p.iscancelled(); s = f.line())
  {
    if (extended)
    {
      int p, i;

      while ((p = s.find("%yr%")) >= 0)
        for (i = 0; i < 4; i++) s[p + i] = year[i];
      while ((p = s.find("%frm%")) >= 0)
        for (i = 0; i < 5; i++) s[p + i] = firm[i];
      while ((p = s.find("%att%")) >= 0)
        for (i = 0; i < 5; i++) s[p + i] = attprev[i];
    }
    if ((r + e) % 50 == 0)
    {
      s1.format("Imp. archivio %s\n%6ld records %6ld errori - %3d", (const char*)filename, r, e, last);
      p.set_text(s1);
    }
    p.setstatus(nread + 1);
    nread += s.len() + 1;
    zero();
    if (fixedlen)
    {
      int pos = 0;
      for (int j = 0; j < nflds; j++)
      {
        s1 = s.mid(pos,len[j]);
        s1.rtrim();
        put((const TString&) fld[j], s1);
        pos += len[j];
      }
    }
    else
    {
      s.restart();
      for (int j = 0; j < nflds; j++)
      {
        char* s2 = (char*) s.get();
        if (fd) 
        {
          s2++;
          s2[strlen(s2) - 1] = '\0';
        }
        put((const TString&) fld[j], s2);
      }
    }            
    
    int err = write();
    if (err == _isreinsert)
      err = rewrite();
      
    if (err == NOERR)  
      r++;
    else 
    {
      error_box("Errore di scrittura alla riga %ld", r+e+1);
      e++;
      last = status();
      break;
    }
  }
  s1.format("Imp. archivio %s\n%6ld records %6ld errori - %3d", (const char*)filename, r, e, last);
  p.set_text(s1);
  
  prefix().close_isamfile(isam_handle);
  
  setstatus(err);
  return err;
}

// @doc EXTERNAL

// @mfunc Esporta VERSO un file ascii. 
//
// @rdesc Ritorna NOERR se l'operazione di esportazione e' riuscita, altrimenti il codice di
//    di errore generato (vedi <t TIsamerr>).
int TSystemisamfile::dump(
    const char* to, // @parm Nome del file verso quale esportare
    int nkey,     // @parm Numero della chiave di ordinamento con cui scaricare i dati (defualt 1)
    char fs,    // @parm Carattere seperatore di campo (defualt <pipe>)
    char fd,            // @parm Carattere delimitatore di campo (default '\\0')
    char rs,            // @parm Carattere separatore di record (default '\\n')
    bool vis,     // @parm Indica se visualizzare lo stato dell'operazione (defualt TRUE)
    bool withdeleted) // @parm Indica se scaricare anche i record cancellati (dafault FALSE)

// @xref <mf TSystemisamfile::load>

{
  FILE* f = fopen(to, "w");

  if (f == NULL) 
  {
    setstatus(2);
    return 2;
  }

  if (withdeleted) nkey = 0;
  int err = ferror(f);
  
  open(FALSE, nkey ? TRUE : FALSE);
  TString s(512);
  bool fixedlen = (fs == '\0');
  int nflds = curr().items();
  TArray  fld(nflds);
  TBit_array rjust(nflds);
  int        len[MaxFields];

  for (int j = 0; j < nflds; j++)
  {
    fld.add(TString(curr().fieldname(j)), j);
    const TString & wfld = (const TString&) fld[j];
    const TFieldtypes t = curr().type(wfld);
    rjust.set(j, t == _intfld || t == _longfld || t == _realfld ||
              t == _wordfld || t == _intzerofld || t == _longzerofld);
    len[j] = (t == _datefld) ? 10 : curr().length(wfld);
  }
  TRecnotype i = 0;
// const TRecnotype nitems = nkey ? items() : filehnd()->d->EOD;
  const TRecnotype nitems = items();
  
  s.format("Esportazione archivio %s", filename());
  TProgind p(nitems, s, TRUE, TRUE, 70);
  TString s1;

  fprintf(f, "[Header]\nVersion=%ld\nFile=%d", 
          prefix().filelevel(), num());
  for (int k = 0; k < nflds; k++)
  {
    if ((k % 10) == 0) fprintf(f, "\nFields=");
    else fprintf(f, "|");
    fprintf(f, "%s,%d", (const char *) (const TString&) fld[k], len[k]);
  }
  fprintf(f, "\n\n[Data]\n");
  if (nkey)
  {
    setkey(nkey);
    for ( first(); status() == NOERR && !p.iscancelled(); next(), i++)
    {
      p.setstatus(i + 1);
      s = "";
      for (j = 0; j < nflds; j++)
      {
        if (fixedlen)
        {
          s1 = get((const TString&)fld[j]);
          if (rjust[j]) s1.right_just(len[j]);
          else s1.left_just(len[j]);
        }
        else
        {
          s1 = "";
          if (j && fs) s1 << fs;
          if (fd) s1 << fd;
          s1 << get((const TString&)fld[j]);
          if (fd) s1 << fd;
        }
        s << s1;
      }
      fprintf(f, "%s%c", (const char*) s, rs);
    }
  }
  else
  {
    for (i = 0; i < nitems && !p.iscancelled(); i++)
    {
      zero();
      p.setstatus(i + 1);
      readat(i + 1);
      s="";
      if (withdeleted || curr().valid())
      {
        for (j = 0; j < nflds; j++)
        {
          if (fixedlen)
          {
            s1 = get((const TString&)fld[j]);
            if (rjust[j]) s1.right_just(len[j]);
            else s1.left_just(len[j]);
          }
          else
          {
            s1 = "";
            if (j && fs) s1 << fs;
            if (fd) s1 << fd;
            s1 << get((const TString&)fld[j]);
            if (fd) s1 << fd;
          }
          s << s1;
        }
        fprintf(f, "%s%c", (const char*) s, rs);
      }
    }
  }
  p.setstatus(nitems);
  close();
  fclose(f);
  setstatus(err);
  return err;
}       

#endif // FOXPRO


void TBaseisamfile::recover()
{
}


////////////////////////////////////////////////////////////
//      TRectype
////////////////////////////////////////////////////////////

TRectype::TRectype(int logicnum)
         : _cod(NULL), _memo_data(NULL), _memo_dirty(NULL)
  
{
  _logicnum = logicnum;
  _length = prefix().get_reclen(logicnum);
  _rec = new char [_length];
  *_tab = '\0';
  if (_length > 0)
  {
    zero();
    if (rec_has_memo(rec_des()))
      init_memo(RECORD_NON_FISICO);
  }
  else
    setempty(TRUE);
}

TRectype::TRectype(const TBaseisamfile* i)
         : _cod(NULL), _memo_data(NULL), _memo_dirty(NULL)
{
  _logicnum = i->num();
  _length = prefix().get_reclen(_logicnum);
  _rec = new char [_length];
  *_tab = '\0';
  if (_length > 0)
  {
    zero();
    if (rec_has_memo(rec_des()))
      init_memo(RECORD_NON_FISICO);
  }
  else
    setempty(TRUE);
}


TRectype::TRectype(const TRectype& r)
        : _logicnum(r._logicnum), _cod(NULL), 
          _memo_data(NULL), _memo_dirty(NULL)
  
{
  if (r._memo_data)
  {
    init_memo();                           
    *_memo_data = *r._memo_data;
    CHECK(r._memo_dirty, "memo_dirty NULL con memo_data valido");
    *_memo_dirty= *r._memo_dirty;
  }               
  _length = r.len();
  _rec = new char [ _length ];
  _rec[0] = r._rec[0];
  memcpy(_rec + 1, r._rec + 1, _length - 1);
  strcpy(_tab, r._tab);
  if (r._cod != NULL)
    _cod = new TRecfield(*this, "COD");
  setempty(r.empty());
}

TRectype::~TRectype()
{
  if (_cod != NULL) delete _cod;
  if (_rec != NULL) delete _rec;
  if (_memo_data != NULL ) delete _memo_data;
  if (_memo_dirty != NULL ) delete _memo_dirty;
}

void TRectype::unknown_field(const char* name) const 
{
  yesnofatal_box("Il campo '%s' non appartiene al file %d", name, _logicnum);
}
                    
void TRectype::write_memo(int fhnd, const TRecnotype recno)
{   
  memo_recno(recno);
  CHECK( _memo_recno > 0,  "Maiale! Non fare le GO con _recno < 0 " );
  DB_go( fhnd, _memo_recno );
  RecDes *r = rec_des( );
  for( int i = _memo_data->last( ); i > 0; i = _memo_data->pred( i ) )
    DB_memowrite( fhnd, r->Fd[ i ].Name, ( char * )( const char * )_memo_data->row( i ) );
  *this = (const char *) DB_getrecord(fhnd);
  init_memo(recno);
}


void TRectype::init_memo( const TRecnotype recno)
{  
  memo_recno(recno);
  if (_memo_data == NULL)
    _memo_data = new TString_array();
  else
    _memo_data->destroy();
  if (_memo_dirty == NULL)
    _memo_dirty = new TBit_array();
  else
    _memo_dirty->reset();
}

void TRectype::settab(const char *tab)
{ 
  if (_cod != NULL)
  {
    delete _cod;
    _cod = NULL;
  }
  strcpy(_tab, tab);
  if (*_tab != '\0')
    _cod = new TRecfield(*this, "COD"); 
  zero();  
}

TObject* TRectype::dup() const
{
  TRectype* o = new TRectype(*this);
  return o;
}

const char* TRectype::build_key(int num) const
{
  __build_key(rec_des(), num, string(), __tmp_string, TRUE);
  return __tmp_string;
}

const char* TRectype::last_key_field(int key) const
{
  const KeyDes& kd = rec_des()->Ky[key];
  const int last = kd.NkFields-1;
  const bool upp = kd.FieldSeq[last] > MaxFields;
  const int nf = upp ? kd.FieldSeq[last] - MaxFields : kd.FieldSeq[last];
  const RecFieldDes& rf = rec_des()->Fd[nf];  
  return rf.Name;
}

// @doc EXTERNAL

// @mfunc Confronta le chiavi di due record
//
// @rdesc Ritorna il risultato di una <f strcmp>:
//
// @flag 0 | Se le due chiavi sono uguali
// @flag <lt><gt>0 | Se le due chiavi sono diverse
int TRectype::compare_key(
    const TRectype& rec, // @parm Record di cui confrontare le chiavi
    int key,             // @parm Numero della chiave del presente record (defautl 1)
    int skip_last) const // @parm Numero di campi da ignorare nella comparazione a partire dall'ultimo

// @xref <mf TRectype::build_key>
{
  TString256 key1= build_key(key);
  TString256 key2 = rec.build_key(key);
  if (skip_last > 0)
  {                
    const KeyDes& kd = rec_des()->Ky[key-1];
    const int last = kd.NkFields-1;
    CHECKD(last >= skip_last, "Can't ignore so many fields in key: ", skip_last);
    for (int l = 0; l < skip_last; l++)
    {
      int nf = kd.FieldSeq[last-l]; 
      if (nf > MaxFields) nf -= MaxFields;
      const RecFieldDes& rf = rec_des()->Fd[nf];  
      key1.rtrim(rf.Len);
      key2.rtrim(rf.Len);
    }  
  }
  const int res = strcmp(key1, key2);
  return res;
}

HIDDEN bool fld_empty(const char* s, int len, bool number)
{
  if (*s)
  {
    for (; len; s++, len--)
      if (*s != ' ') return FALSE;
  }
  return TRUE;
}


HIDDEN int fld_cmp(const char* a, const char* b, int len, bool number)
{
  for (int i = 0; i < len && *a == *b; b++, a++, i++);
  if (i == len) return 0;
  int res = *a - *b;      
  if (number)
  {
    b -= i;
    i  = 0;
  }
  return fld_empty(b, len - i, number) ? 0 : res;
}


///////////////////////////////////////////////////////////
// TRectype (record di un file)
///////////////////////////////////////////////////////////

RecDes* TRectype::rec_des() const  
{
  return (RecDes*)&prefix().get_recdes(_logicnum);
}

int TRectype::items() const
{
  return rec_des()->NFields;
}


const char* TRectype::start(int nf) const
{
  return string() + rec_des()->Fd[nf].RecOff;
}


int TRectype::compare(const TSortable& s) const
{
  const TRectype& br = (const TRectype&) s;
  int res = 0;

  if (br.empty()) return UNDEFINED;
  
  const RecDes& rd = *rec_des();
  for (int i = 0; i < items() ; i++)
  {
    const char* b = br.start(i);
    const char* a = start(i);
    const byte typ = rd.Fd[i].TypeF;
    const int  sz  = rd.Fd[i].Len;
    const bool number = (typ == _intfld) || (typ == _realfld) ||
      (typ == _longfld) || (typ == _wordfld) ||
        (typ == _intzerofld) || (typ == _longzerofld)

          || (typ == _datefld) ;

    if (fld_empty(b, sz, number)) continue;
    res = ::fld_cmp(a, b, sz, number);
    if (res) return res;
  }
  return 0;
}

TFieldtypes TRectype::type(const char* fieldname) const
{
  const RecDes* recd = rec_des();
  int  p;

  if ((p = findfld(recd, fieldname)) != -1) return (TFieldtypes) recd->Fd[p].TypeF;
  else return _nullfld;
}


int TRectype::length(const char* fieldname) const

{
  int     p; 
  const RecDes * recd = rec_des();

  if ((p = findfld(recd, fieldname)) != -1) return(recd->Fd[p].Len);
  else return(0);
}


int TRectype::ndec(const char* fieldname) const

{
  int     p;
  const RecDes * recd = rec_des();

  if ((p = findfld(recd, fieldname)) != -1) return(recd->Fd[p].Dec);
  else return(0);
}


bool TRectype::exist(const char* fieldname) const
{                   
  const bool ok = findfld(rec_des(), (char*)fieldname) != FIELDERR;
  return ok;
}


const char* TRectype::fieldname(int i) const
{
  const RecDes * recd = rec_des();
  return i >= 0 && i < recd->NFields ? recd->Fd[i].Name : NULL;
}                            

const TString& TRectype::get_str(const char* fieldname) const
{     
  char * s = _isam_string;
  static TFixed_string tmp(_isam_string, sizeof(_isam_string));
  const RecDes * recd = rec_des();
  int nf = findfld(recd, fieldname);

  if (nf == FIELDERR)
  { 
    unknown_field(fieldname);
    *s = '\0';
  }
  else
    __getfieldbuff(recd->Fd[nf].Len, recd->Fd[nf].TypeF, 
                   _rec + recd->Fd[nf].RecOff, s);
  return tmp;
}

#ifndef FOXPRO

const TString& TRectype::get(const char* fieldname) const
{          
  if(type( fieldname ) == _memofld )
  {
    int index( findfld( rec_des( ), ( char * )fieldname ) );  
    if ( _memo_data->objptr( index ) && (*_memo_dirty)[ index ] )
      return _memo_data->row( index );    
    if( _memo_recno >=  0L )
    {
      TFilename fname;
      int lnum = num();
      TIsam_handle isam_handle = prefix().open_isamfile(lnum, fname);
      TCodeb_handle cb_handle = prefix().get_handle(isam_handle);
      CHECKD(cb_handle >= 0, "Can't read memo from file ", lnum);
      DB_go(cb_handle, _memo_recno );
      _memo_data->add( DB_memoptr(cb_handle, fieldname ), index );    
      prefix().close_isamfile(isam_handle);
    }
    else
      _memo_data->add( "", index );
    return _memo_data->row( index );
  }  
  return get_str(fieldname);
}

int TRectype::get_int(const char* fieldname) const
{
  
  return atoi(get_str(fieldname));
}


long TRectype::get_long(const char* fieldname) const
{
  return atol(get_str(fieldname));
}


word TRectype::get_word(const char* fieldname) const

{
  return (word)atoi(get_str(fieldname));
}

real TRectype::get_real(const char* fieldname) const

{
  real r(get_str(fieldname));
  return r;
}


char TRectype::get_char(const char* fieldname) const

{
  return *(get_str(fieldname));
}


bool TRectype::get_bool(const char* fieldname) const

{
  return *(get_str(fieldname)) == 'X';
}

// @doc EXTERNAL

// @mfunc Ritorna il contenuto di un campo memo
//
// @rdesc Ritorna sempre TRUE
bool TRectype::get_memo(
     const char* fieldname, // @parm Nome del campo da cui estrarre il contenuto
     TTextfile& txt) const  // @parm Reference della variabile a cui assegnare il contenuto dell campo
{
  TToken_string memo( get( fieldname ), '\n' );
  const int last = memo.items( );
  for( int i = 0; i < last; i ++ )
  {
     TString m(memo.get(i));
     const int l = m.len() > 0 ? m.len()-1 : 0;
     if (m[l] == '\r') m.cut(l);
     txt.append( m );
  }
  return TRUE;
}                   

#endif // FOXPRO


TDate TRectype::get_date(const char* fieldname) const

{
  TDate d(get_str(fieldname));
  return d;
}

#ifndef FOXPRO

void TRectype::put(const char* fieldname, int val)

{           
  sprintf(_isam_string, "%d", val);
  put_str( fieldname, _isam_string);
  setempty(FALSE);
}


void TRectype::put(const char* fieldname, long val)

{
  sprintf(_isam_string, "%ld", val);
  put_str( fieldname, _isam_string);
  setempty(FALSE);
}

void TRectype::put(const char* fieldname, TTextfile& txt)
{
  long val = get_long(fieldname);
  const bool isnew = val == 0;
  
  TFilename fname;
  int logicnum = num();
  TIsam_handle isam_handle = prefix().open_isamfile(logicnum, fname);
  
  TMemo_file memo(fname);
  
  prefix().close_isamfile(isam_handle);

  const long id = memo.set_field(txt, isnew ? FIELDERR : val);
  if (isnew) val = id;

  sprintf(_isam_string, "%ld", val);
  put_str( fieldname, _isam_string);
  setempty(FALSE);
}


void TRectype::put(const char* fieldname, word val)

{
  sprintf(_isam_string, "%u", val);
  put_str( fieldname, _isam_string);
  setempty(FALSE);
}

void TRectype::put(const char* fieldname, const real& val)
{
  put_str( fieldname, val.string());
  setempty(FALSE);
}

void TRectype::put(const char* fieldname, const TDate& val)
{            
  put_str( fieldname, val.string(full));
  setempty(FALSE);
}

void TRectype::put(const char* fieldname, char val)

{
  const char  w[2] = {val, '\0'};
  
  put_str( fieldname, w);
  setempty(FALSE);
}


void TRectype::put(const char* fieldname, bool val)

{
  char s[2] = { val ? 'X' : ' ', '\0'};
  put_str( fieldname, s);
  setempty(FALSE);
}

#endif // FOXPRO


void TRectype::put_str(const char* fieldname, const char* val)
{                                            
  const RecDes* recd = rec_des();
  const int nf = findfld(recd, fieldname);
  if (nf == FIELDERR)
    unknown_field(fieldname);
  const TFieldtypes ft = (TFieldtypes)recd->Fd[nf].TypeF;
  
  if (val == NULL)
    val = "";
  if (ft == _boolfld)                            
    val = (*val && strchr("1STXY", toupper(*val)) != NULL) ? "T" : "F";
  if (*val == '\0')  // Da provare
  {
    TRecfield f(*this, fieldname);
    if (*f.pos() == '\0') return;
  }

  if(ft == _memofld)
  {
    _memo_dirty->set(nf);
    _memo_data->add(val, nf); 
  }  
  else
  {
    __putfieldbuff(recd->Fd[nf].Len, recd->Fd[nf].Dec, ft, val,
                    _rec + recd->Fd[nf].RecOff);
  }
  setempty(FALSE);
}

void TRectype::zero(const char* fieldname)
  
{
  if (_cod != NULL && strcmp(fieldname , "COD") == 0)
    *_cod = _tab;
  else 
  {
    const RecDes * recd = rec_des();
    int nf = findfld(recd, fieldname);
    if (nf == FIELDERR)
      unknown_field(fieldname);
    else
    {
      const int recoff = recd->Fd[nf].RecOff;
      char * p = _rec + recoff;
      const byte len = recd->Fd[nf].Len; 
      const byte dec = recd->Fd[nf].Dec; 
      const TFieldtypes type = (TFieldtypes) recd->Fd[nf].TypeF;
      if (type == _datefld)
        __putfieldbuff(len, dec, _datefld, "", p);
      else
      {
        memset(p, ' ', len);
        if ((type == _intfld) || (type == _longfld) || (type == _wordfld))
          *(p + len - 1) = '0';
        else
          if (type == _realfld)
          {
            if (dec)
            {
              memset(p + len - dec - 2, '0', dec + 2);
              *(p + len - dec - 1) = '.';
            }
            else
              *(p + len - 1) = '0';
          }
      }
    }
  }
}

void TRectype::zero(char c)
  
{
  recall();
  memset(_rec + 1, c, len() - 1);

  if (_cod != NULL)
    *_cod = _tab;
  
  if(has_memo())
    init_memo( RECORD_NON_FISICO );
  setempty(TRUE);
}


// Certified 99%
TRectype& TRectype::operator =(const TRectype& rec)
  
{
  CHECK(num() == rec.num(), "Can't assign records of different file");

  memcpy(_rec, rec._rec, _length);       // Copy contents
  if (rec._memo_data)
  {    
    init_memo(rec._memo_recno);//   ??                          
    *_memo_data = *rec._memo_data;
    CHECK(rec._memo_dirty, "memo_dirty NULL con memo_data valido");
    *_memo_dirty= *rec._memo_dirty;
  }
  setempty(rec.empty());                   // Copy emptiness status
  return *this;
}

// Certified 100%
TRectype& TRectype::operator =(const TBaseisamfile& f)
{
  return *this = f.curr();
}

// Certified  50%
int TRectype::read(TBaseisamfile& f, word op, word lockop)
{ 
  return f._read(*this,op,lockop) ;
}

int TRectype::readat(TBaseisamfile& f, TRecnotype nrec, word lockop)
{
  return f._readat(*this,nrec,lockop);
}


// Certified 100%
int TRectype::next(TBaseisamfile& f,word lockop)
{ 
/*  const int err = f._read(*this, _isnext, lockop); 
  *this = f.curr();
  return err;  */
  return read(f, _isnext, lockop); 
}

// Certified 100%
int TRectype::prev(TBaseisamfile& f,word lockop)
{ 
  return read(f, _isprev, lockop); 
}

int TRectype::first(TBaseisamfile& f,word lockop)
{ 
  return read(f, _isfirst, lockop); 
}

int TRectype::last(TBaseisamfile& f,word lockop)
{ 
  return read(f, _islast, lockop); 
}

// Certified ??%
int TRectype::write(TBaseisamfile& f) const
{ return f._write(*this); }

// Certified ??%
int TRectype::rewrite(TBaseisamfile& f) const
{ 
  return f._rewrite(*this); 
}

// Certified ??%
int TRectype::remove(TBaseisamfile& f) const
{ 
  return f._remove(*this); 
}

void TRectype::renum_key(const char* field, const char* val)
{
  put(field, val);
}

// Certified 99%
TRectype& TRectype::operator =(const char* rec)
{
  memcpy(_rec, rec, _length);
  setempty(FALSE);
  return *this;
}


const char* TRectype::key(int numkey) const
{
  __build_key(rec_des(), numkey, _rec, _isam_string,FALSE);
  return _isam_string;
}

///////////////////////////////////////////////////////////
// TRecfield (campo/sottocampo di un record)
///////////////////////////////////////////////////////////

void TRecfield::set(int from, int to)

{
  int nf;
  RecDes* rd = _rec->rec_des();

  if ((nf = findfld(rd, _name)) == FIELDERR)
  {
    _p = NULL;
    _len = 0;
    _dec = 0;
    _type = _nullfld;
    yesnofatal_box("File n. %d unknown field %s", _rec->num(), _name);
  }
  else
  {
    CHECK(from >= 0, "Invalid Start");
    _p = _rec->string() + rd->Fd[nf].RecOff + from;
    _dec = rd->Fd[nf].Dec;
    _type = (TFieldtypes)rd->Fd[nf].TypeF;
    if  (to >= 0)
    {
      CHECK(from <= to && to <= rd->Fd[nf].Len, "Invalid Range");
      _len = to - from + 1;
    }
    else _len = rd->Fd[nf].Len - from;
  }
}

TRecfield::TRecfield(TRectype& rec, const char* name, int from, int to)

{
  strcpy(_name, name);
  _rec = &rec;
  set(from, to);
}

int TRecfield::operator =(int i)

{
  sprintf(_isam_string, "%d", i);
  __putfieldbuff( _len, _dec, _type, _isam_string, _p);
  _rec->setempty(FALSE);
  return i;
}


long TRecfield::operator =(long l)

{
  sprintf(_isam_string, "%ld", l);
  __putfieldbuff( _len, _dec, _type, _isam_string, _p);
  _rec->setempty(FALSE);
  return l;
}


#ifndef FOXPRO

const real& TRecfield::operator =(const real& r)
{
  strcpy(_isam_string, r.string());
  __putfieldbuff( _len, _dec, _type, _isam_string, _p);
  _rec->setempty(FALSE);
  return r;
}

#endif // FOXPRO


const TDate& TRecfield::operator =(const TDate& d)
{
  strcpy(_isam_string, (const char*)d);
  __putfieldbuff( _len, _dec, _type, _isam_string, _p);
  _rec->setempty(FALSE);
  return d;
}

const char* TRecfield::operator =(const char* s)
{
  __putfieldbuff( _len, _dec, _type, s, _p);
  _rec->setempty(FALSE);
  return s;
}

void TRecfield::setptr(TRecnotype r)
{
  if (_p == NULL) return;
  
  bool n = r < 0;
  unsigned char*  wp = (unsigned char*) _p;

  if (n) r = -r;
  while(wp - (unsigned char*) _p <= 3)
  {
    *wp = r && 0x000000FF;
    r >>= 8;
    wp++;
  }
  if (n) *wp += 128;
}


TRecfield::operator int() const
{
  if (_type == _intfld || _type == _intzerofld || _type == _longfld || _type == _longzerofld)
  {
    strncpy(_isam_string, _p, _len);
    _isam_string[_len] = '\0';
  }  
  else
    __getfieldbuff( _len, _type, _p, _isam_string);
  return atoi(_isam_string);
}


TRecfield::operator long() const
{
  if (_type == _longfld || _type == _longzerofld || _type == _intfld || _type == _intzerofld)
  {
    strncpy(_isam_string, _p, _len);
    _isam_string[_len] = '\0';
  }
  else  
    __getfieldbuff( _len, _type, _p, _isam_string);
  
  return atol(_isam_string);
}



#ifndef FOXPRO

TRecfield::operator const real() const
{
  if (_type == _realfld)
  {
    strncpy(_isam_string, _p, _len);
    _isam_string[_len] = '\0';
  }
  else
    __getfieldbuff( _len, _type, _p, _isam_string);
  real r(_isam_string);
  return r;
}

#endif // FOXPRO


TRecfield::operator TDate() const
{    
  if (_type == _datefld)                          
  {
    strncpy(_isam_string, _p, 8);
    _isam_string[8] = '\0';
    return TDate(atol(_isam_string));
  }  
  __getfieldbuff(_len, _type, _p, _isam_string);
  return TDate(_isam_string);
}


TRecfield::operator const char*() const
{    
  if (_type == _memofld)
    return _rec->get(_name);

  __getfieldbuff(_len, _type, _p, _isam_string);
  return _isam_string;
}


TRecnotype TRecfield::ptr() const
{
  if (_p == NULL) return(RECORD_NON_FISICO);
  unsigned char*  wp = (unsigned char*) _p + 3;
  TRecnotype   r  = *wp;
  bool         n = r > 127;

  if (n) r -= 128;
  while(wp-- > (unsigned char*) _p) r = r << 8 + *wp;
  return n ? -r : r;
}