b3cd9c64a9
Files correlati : no patch Ricompilazione Demo : [ ] Commento : Riportata la versione 01.05 patch 888 sul main trunk git-svn-id: svn://10.65.10.50/trunk@9217 c028cbd2-c16b-5b4b-a496-9718f37d4682
2854 lines
69 KiB
C++
Executable File
2854 lines
69 KiB
C++
Executable File
#include <config.h>
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#include <expr.h>
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#include <extcdecl.h>
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#include <prefix.h>
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#include <relation.h>
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#include <sheet.h>
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#include <sort.h>
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#include <tabutil.h>
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#include <codeb.h>
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// *** check if not already defined
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#define NOTFOUND (-1)
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// *** maximum number of elements in a cursor working page
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#define CMAXELPAGE 8000
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#define print_name(out, f) out << (f.num() == LF_TABCOM ? "%" : "") << f.name()
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extern int get_error(int);
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HIDDEN const char* field_type_str(TFieldtypes f)
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{
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const char* c = "";
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switch(f)
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{
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case _charfld:
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c = "Carattere"; break;
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case _realfld:
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c = "Reale"; break;
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case _datefld:
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c = "Data"; break;
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case _boolfld:
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c = "Logico"; break;
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// case _wordfld:
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// case _intzerofld:
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// case _longzerofld:
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// case _intfld:
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// case _longfld:
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default:
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c = "Intero"; break;
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}
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return c;
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}
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///////////////////////////////////////////////////////////
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// TRelationdef
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///////////////////////////////////////////////////////////
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class TRelationdef : public TObject
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{
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friend class TRelation;
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const TRelation* _rel; // Relazione padre
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int _num; // Posizione file
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int _numto; // Posizione padre
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int _alias; // Alias
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byte _key; // Chiave
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TArray _fields; // Campi di join
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TArray _exprs; // Condizioni di uguaglianza
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TArray _altexprs; // Condizioni di uguaglianza alternative
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TBit_array _forced;
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bool _first_match : 1; // primo match (ed esiste)
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bool _allow_lock : 1; // ??
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bool _write_enable : 1;
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public: // TObject
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virtual void print_on(ostream& out) const;
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public:
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int num() const { return _num; }
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int link() const { return _numto; }
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int alias() const { return _alias; }
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bool allow_lock() const { return _allow_lock; }
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bool write_enable() const { return _write_enable; }
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void write_enable(bool we) { _write_enable = we; }
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TRectype& load_rec(TRectype& r, const TRectype& from) const;
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const char* evaluate_expr(int j, const TLocalisamfile& to);
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void print_on(TToken_string& out) const;
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TRelationdef(const TRelation* rel, int file, byte key,
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int linkto, const char* relexprs, int alias,
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bool allow_lock);
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virtual ~TRelationdef() {}
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};
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TRelationdef::TRelationdef(const TRelation* rel, int idx_file, byte key,
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int idx_to, const char* relexprs, int alias,
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bool allow_lock)
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: _num(idx_file), _key(key), _numto(idx_to),
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_rel(rel), _fields(4), _exprs(4), _alias(alias),
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_first_match(FALSE), _allow_lock(allow_lock),
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_write_enable(FALSE)
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{
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TToken_string rels(relexprs);
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int i = 0;
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TString80 r,s;
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for (const char* g = rels.get(); g; g = rels.get(), i++)
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{
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r = g;
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int eq = r.find('=');
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CHECKS(eq > 0, "Ahoo! E l'uguale 'ndo sta? ", (const char*)g);
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s = r.left(eq); // Parte a sinistra dell' =
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#ifdef DBG
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const char* n = s;
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const int p = s.find('[');
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if (p > 0) n = s.left(p);
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if (rel->file(_num).curr().exist(n) == FALSE)
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{
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yesnofatal_box("Errore di JOIN: '%s' non e' un campo del file %d",
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n, rel->file(_num).num());
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continue;
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}
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#endif
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if (r[eq+1] == '=')
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{
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_forced.set(i);
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eq++;
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}
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_fields.add(new TFieldref(s, 0));
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s = r.mid(eq+1);
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const int par = s.find('(');
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if (par > 0)
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{
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_exprs.add(new TExpression(s.left(par), _strexpr), i);
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_altexprs.add(new TExpression(s.sub(par+1, s.len()-1), _strexpr), i);
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}
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else
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_exprs.add(new TExpression(s, _strexpr), i);
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}
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}
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void TRelationdef::print_on(ostream& out) const
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{
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const TLocalisamfile& f = _rel->file(_num);
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out << "JOIN ";
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print_name(out, f);
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if (_numto > 0)
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{
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out << " TO ";
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const int alias = _rel->reldef(_numto-1).alias();
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if (alias > 0) out << alias << '@';
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else
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{
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const TLocalisamfile& t = _rel->file(_numto);
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print_name(out, t);
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}
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}
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if (_key > 1) out << " KEY " << (int)_key;
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if (_alias > 0) out << " ALIAS " << _alias;
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for (int i = 0; i < _fields.items(); i++)
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{
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if (i == 0) out << " INTO";
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out << ' ' << _fields[i] << '=';
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if (_forced[i]) out << '=';
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out << _exprs[i];
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if (_altexprs.objptr(i))
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out << '(' << _altexprs[i] << ')';
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}
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}
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void TRelationdef::print_on(TToken_string& out) const
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{
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const TLocalisamfile& f = _rel->file(_num);
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out = "";
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print_name(out, f);
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// add description
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const char* name = f.name();
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if (f.tab())
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name = TDir::tab_des(name);
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else
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name = prefix().description(name);
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out.add(name);
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out << '|';
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if (_numto > 0)
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{
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const int alias = _rel->reldef(_numto-1).alias();
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if (alias > 0)
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out << alias << '@';
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else
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{
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const TLocalisamfile& t = _rel->file(_numto);
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print_name(out, t);
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}
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} else out << ' ';
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out.add(_key);
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out.add(_alias);
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out << '|';
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for (int i = 0; i < _fields.items(); i++)
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{
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if (i) out << ' ';
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out << _fields[i] << '=';
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if (_forced[i]) out << '=';
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out << _exprs[i];
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if (_altexprs.objptr(i))
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out << '(' << _altexprs[i] << ')';
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}
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}
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const char* TRelationdef::evaluate_expr(int j, const TLocalisamfile& to)
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{
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TExpression& expr = (TExpression&)_exprs[j];
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TString16 name;
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for (int k = 0; k < expr.numvar(); k++)
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{
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name = expr.varname(k); name.upper();
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expr.setvar(k, to.get(name));
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}
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const char* val = (const char* )expr.as_string();
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if (*val == '\0' && _altexprs.objptr(j))
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{
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TExpression& altexpr = (TExpression&)_altexprs[j];
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for (int k = 0; k < expr.numvar(); k++)
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{
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name = altexpr.varname(k); name.upper();
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altexpr.setvar(k, to.get(name));
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}
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val = (const char*)altexpr.as_string();
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}
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return val;
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}
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///////////////////////////////////////////////////////////
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// TRelation
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///////////////////////////////////////////////////////////
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TRelation::TRelation(int logicnum)
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: _files(4), _reldefs(4), _errors(NOERR)
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{
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TLocalisamfile* f = new TLocalisamfile(logicnum);
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_files.add(f);
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}
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TRelation::TRelation(const char* tabname)
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: _files(4), _reldefs(4), _errors(NOERR)
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{
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TTable* t = new TTable(tabname);
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_files.add(t);
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}
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TRelation::TRelation(TLocalisamfile* l)
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: _files(4), _reldefs(4), _errors(NOERR)
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{
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_files.add(l);
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}
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TRelation::~TRelation()
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{}
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void TRelation::print_on(ostream& out) const
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{
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const TLocalisamfile& f = file();
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out << "USE "; print_name(out, f);
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const int k = f.getkey();
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if (k > 1) out << " KEY " << k;
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out << endl;
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for (int r = 0; r < _reldefs.items(); r++)
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out << _reldefs[r] << endl;
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}
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void TRelation::restore_status()
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{
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_status.restart();
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for (int i = 0; i < _files.items(); i++)
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{
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const int err = _status.get_int();
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const TRecnotype recno = _status.get_long();
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const int key = _status.get_int();
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file(i).setkey(key);
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if (recno >= 0l) file(i).readat(recno);
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else file(i).curr().zero();
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file(i).setstatus(err);
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}
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for (i = 0; i < _reldefs.items(); i++)
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{
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const bool first_match = _status.get_int() ? TRUE : FALSE;
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reldef(i)._first_match = first_match;
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}
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}
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void TRelation::save_status()
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{
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_status.cut(0);
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for (int i = 0; i < _files.items(); i++)
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{
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const int err = file(i).status();
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const TRecnotype recno = file(i).eof() ? -1l : file(i).recno();
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const int key = file(i).getkey();
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_status.add (err);
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_status.add (recno);
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_status.add (key);
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}
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for (i = 0; i < _reldefs.items(); i++)
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{
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const bool first_match = reldef(i)._first_match;
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_status.add(first_match);
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}
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}
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// @doc EXTERNAL
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// @mfunc Ritorna l'indice di <p _files> del numero logico passato
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//
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// @rdesc Ritorna l'indice oppure NOTFOUND nel caso non sia presente
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int TRelation::log2ind(
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int log) const // @parm Numero logico del file di cui conoscere l'indice
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// @comm Nel caso <p log> sia minore di 0 chiama la <mf TRelation::alias2ind>
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//
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// @xref <mf TRelation::alias2ind> <mf TRelation::name2ind>
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{
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// returns _files index of logical number or NOTFOUND if not present
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if (log <= 0)
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return alias2ind(-log);
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const int nf = _files.items();
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for (int i = 0; i < nf; i++)
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if (file(i).num() == log)
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return i;
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return NOTFOUND;
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}
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// @doc EXTERNAL
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// @mfunc Ritorna l'indice di <p _files> del alias del file passato
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//
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// @rdesc Ritorna l'indice oppure NOTFOUND nel caso non sia presente
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int TRelation::alias2ind(
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int alias) const // @parm Alias del file di cui conoscere l'indice
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// @xref <mf TRelation::log2ind> <mf TRelation::name2ind>
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{
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if (alias <= 0) return 0;
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for (int i = 0; i < _reldefs.items(); i++)
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{
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const TRelationdef& r = (const TRelationdef&)_reldefs[i];
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if (r.alias() == alias) return r.num();
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}
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return NOTFOUND;
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}
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// @doc EXTERNAL
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// @mfunc Ritorna l'indice di <p _files> del nome del file passato
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//
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// @rdesc Ritorna l'indice oppure NOTFOUND nel caso non sia presente
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int TRelation::name2ind(
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const char* name) const // @parm Nome del file di cui conoscere l'indice
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// @xref <mf TRelation::alias2ind> <mf TRelation::alias2ind>
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{
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const int num = name2log(name);
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const int ind = log2ind(num);
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return ind;
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}
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// @doc EXTERNAL
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// @mfunc Ritorna il descrittore del file
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//
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// @rdesc Ritorna il reference ad un <c TLocalisamfile> che indica il descrittore del
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// file della relazione
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TLocalisamfile& TRelation::lfile(
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int logicnum) const // @parm Numero logico del file da ritornare (default 0)
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// @parm const char* | name | Nome del file da ritornare
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// @syntax TLocalisamfile& lfile(int logicnum)
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// @syntax TLocalisamfile& lfile(const char* name)
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//
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// @comm E' comodo utilizzare anche l'operatore [] che richiama questa funzione con
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// la prima sintassi.
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{
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const int idx = log2ind(logicnum);
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CHECKD(idx != NOTFOUND, "Relation file not found n. ", logicnum);
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return (TLocalisamfile&)_files[idx];
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}
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TLocalisamfile& TRelation::lfile(const char* name) const
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{
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const int idx = name2ind(name);
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CHECKS(idx != NOTFOUND, "File or Table not found:", name);
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return (TLocalisamfile&)_files[idx];
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}
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// @doc EXTERNAL
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// @mfunc Abilita/disabilita la scrittura sul file
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void TRelation::write_enable(
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int logicnum, // @parm Numero logico del file da abilitare/disabilitare (default 0)
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// @parm cont char* | name | Nome del file da abilitare/disabilitare
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const bool on) // @parm Indica l'operazione da effettuare sul file:
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//
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// @flag TRUE | Abilita la scrittura sul file (default)
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// @flag FALSE | Disabilita la scrittura sul file
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// @syntax void write_enable(int logicnum, const bool on)
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// @syntax void write_enable(const char* name, const bool on)
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//
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// @comm Nel caso venga passato un numero logico uguale a 0 vengono abilitati/disabilitati tutti
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// i file della relazione
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{
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if (logicnum == 0)
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{
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for (int i = 0; i < _reldefs.items(); i++)
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reldef(i).write_enable(on);
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}
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else
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{
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const int idx = log2ind(logicnum);
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CHECKD(idx > 0, "File not found n. ", logicnum);
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reldef(idx-1).write_enable(on);
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}
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}
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void TRelation::write_enable(const char* name, const bool on)
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{
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const int idx = name2ind(name);
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CHECKS(idx > 0, "File or Table not found:", name);
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reldef(idx-1).write_enable(on);
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}
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// @doc EXTERNAL
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// @mfunc Aggiunge una nuovo file nella relazione
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//
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// @rdesc Ritorna se e' riuscito ad aggiungere il file alla relazione
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bool TRelation::add(
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TLocalisamfile* f, // @parm Descrittore del file da aggiungere
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const char* relexprs, // @parm Espressione della relazione
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int key, // @parm Chiave del file
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int linkto, // @parm Posizione alla quale aggiungere il file
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int alias, // @parm Alias da dare al file da aggiungere
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bool allow_lock) // @parm Indica se fare il lock sul file oppure ignorarli
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// @parm int | logicnum | Numero logico del file da aggiungere
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// @parm const char* | tabname | Nome della tabella da aggiungere
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// @syntax bool add(TLocalisamfile* f, const char* relexprs, int key, int linkto, int alias, bool allow_lock);
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// @syntax bool add(int logicnum, const char* relexprs, int key, int linkto, int alias, bool allow_lock);
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// @syntax bool add(const char* tabname, const char* relexprs, int key, int linkto, int alias, bool allow_lock);
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// @comm Il parametro <p linkto> puo' assumere i valori:
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//
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// @flag 0 | Per il file principale
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// @flag <gt>0 | Indica il numero logico del file
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// @flag <lt>0 | Indica l'alias del file
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{
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const int idxto = log2ind(linkto);
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if (idxto == NOTFOUND)
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fatal_box("Can't join file %d to %d", f->num(), linkto);
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const int idx = _files.add(f);
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CHECK(relexprs && *relexprs, "Mancano le espressioni di collegamento");
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TRelationdef* r = new TRelationdef(this, idx, key, idxto,
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relexprs, alias, allow_lock);
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_reldefs.add(r);
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return TRUE;
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}
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bool TRelation::add(int logicnum, const char* relexprs, int key,
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int linkto, int alias, bool allow_lock)
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{
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TLocalisamfile* f = new TLocalisamfile(logicnum);
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return add(f, relexprs, key, linkto, alias, allow_lock);
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}
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|
|
bool TRelation::add(const char* tabname, const char* relexprs, int key,
|
|
int linkto, int alias, bool allow_lock)
|
|
{
|
|
TTable* t = new TTable(tabname);
|
|
return add(t, relexprs, key, linkto, alias, allow_lock);
|
|
}
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Sostituisce nella relazione un file
|
|
void TRelation::replace(
|
|
TLocalisamfile* f, // @parm Descrittore del file sostituto
|
|
int index, // @parm Posizione nel quale sostituire il file (default 0)
|
|
const char* relexprs, // @parm Nuova Espressione della relazione
|
|
int key) // @parm Nuova Chiave del file
|
|
|
|
{
|
|
const TLocalisamfile* p = (const TLocalisamfile*)_files.objptr(index);
|
|
CHECK(p && p->num() == f->num(), "Can't replace a file with different logic number");
|
|
_files.add(f, index);
|
|
if (relexprs && *relexprs)
|
|
{
|
|
TRelationdef* oldr=(TRelationdef*)_reldefs.objptr(index-1);
|
|
TRelationdef* r = new TRelationdef(this, index, key, oldr->link(),
|
|
relexprs, oldr->alias(), oldr->allow_lock());
|
|
_reldefs.add(r,index-1);
|
|
}
|
|
}
|
|
|
|
// @mfunc Sostituisce nella relazione un file
|
|
void TRelation::replacef(
|
|
TLocalisamfile* f, // @parm Descrittore del file sostituto
|
|
int lognum, // @parm Numero logico o alias
|
|
const char* relexprs, // @parm Nuova Espressione della relazione
|
|
int key) // @parm Nuova Chiave del file
|
|
|
|
{
|
|
int index=0;
|
|
if (lognum<0) index=alias2ind(lognum);
|
|
if (lognum>0) index=log2ind(lognum);
|
|
replace(f,index,relexprs,key);
|
|
}
|
|
|
|
|
|
TRectype& TRelationdef::load_rec(TRectype& r, const TRectype& from) const
|
|
{
|
|
r.zero();
|
|
TString80 val; // Fisso la lunghezza massima ad 80, devono essere campi chiave!
|
|
for (int j = 0 ; j < _fields.items(); j++) // for each field
|
|
{
|
|
const TFieldref& s = (const TFieldref&) _fields[j];
|
|
val = s.read(from);
|
|
s.write(val, r);
|
|
}
|
|
|
|
return r;
|
|
}
|
|
|
|
|
|
void TRelation::zero()
|
|
{
|
|
for (int i = 0; i < _files.items(); i++)
|
|
file(i).zero();
|
|
}
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Permette di posizionare l'albero di relazioni tra i file
|
|
//
|
|
// @rdesc Ritorna il numero di errore avvenuto nell'opeerazione, NOERR nel caso
|
|
// venga eseguito tutto correttamente
|
|
int TRelation::position_rels(
|
|
TIsamop op, // @parm Operatore che esegue la relazione (default _isequal)
|
|
TReclock lockop, // @parm Tipo di lock sul file (default _nolock)
|
|
int first) // @parm Numero del file da cui costruire la relazione (default
|
|
// 0, cioe' dal file principale)
|
|
|
|
// @comm Viene eseguito tutto il lavoro di creazione delle relazione: se non
|
|
// trova un record adatto su un file, svuota il record corrente e non
|
|
// ritorna errore.
|
|
// <nl>Le altre funzioni sul record procedono normalmente
|
|
|
|
{
|
|
TString expr(80); // Stringa di lavoro per la valutazione delle espressioni
|
|
|
|
_errors = NOERR;
|
|
|
|
|
|
const int primo = first < 0 ? 0 : first;
|
|
const int ultimo = first < 0 && (-first) < _reldefs.items() ? -first : _reldefs.items();
|
|
|
|
// workhorse: position files for each active relation
|
|
for (int i = primo; i < ultimo; i++)
|
|
{
|
|
TRelationdef& rd = reldef(i);
|
|
|
|
TLocalisamfile& from = file(rd.num());
|
|
TLocalisamfile& to = file(rd.link());
|
|
from.zero(); // Azzera il record corrente (tutti se TSortedfile)
|
|
|
|
if (to.curr().empty())
|
|
continue;
|
|
|
|
from.setkey(rd._key);
|
|
|
|
// build record
|
|
TRectype& furr = from.curr();
|
|
for (int j = 0; j < rd._fields.items(); j++) // for each field
|
|
{
|
|
expr = rd.evaluate_expr(j, to);
|
|
TFieldref& s = (TFieldref&) rd._fields[j];
|
|
s.write(expr, furr);
|
|
} // for each field
|
|
|
|
const TReclock lck = rd._allow_lock ? lockop : _nolock;
|
|
from.read(_isgteq, lck);
|
|
|
|
// record read : if not found, zero current record
|
|
bool eq = !from.bad();
|
|
for (int kk = 0; eq && kk < rd._fields.items(); kk++)
|
|
{
|
|
TFieldref& fl = (TFieldref&)rd._fields[kk];
|
|
const TString80 f_fr(fl.read(furr));
|
|
const TString80 f_ex(rd.evaluate_expr(kk, to));
|
|
if (rd._forced[kk])
|
|
eq = f_fr == f_ex;
|
|
else
|
|
{
|
|
eq = f_fr.compare(f_ex, f_ex.len()) == 0;
|
|
|
|
// Becca anche 000001=1
|
|
if (!eq && real::is_natural(f_fr) && real::is_natural(f_ex))
|
|
eq = atol(f_fr) == atol(f_ex);
|
|
}
|
|
}
|
|
rd._first_match = eq;
|
|
if (eq)
|
|
from.setstatus(NOERR);
|
|
else
|
|
furr.zero();
|
|
} // for each relation
|
|
return _errors;
|
|
}
|
|
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Posiziona il numero logico sul record successivo
|
|
//
|
|
// @rdesc Ritorna se ha trovato la corrispondenza:
|
|
//
|
|
// @flag TRUE | Corrispondenza trovata
|
|
// @flag FALSE | Corrispondenza non trovata
|
|
bool TRelation::next_match(
|
|
int logicnum, // @parm Numero logico del file da fare avanzare
|
|
const char* fieldlist, // @parm Lista dei campi che devono rimanere costanti (default NULL)
|
|
int nkey) // @parm Numero della chiave (default 0)
|
|
|
|
// @comm Il posizionamento del numero logico non deve essere riferita al file
|
|
// principale; in ogni caso viene considerata consistente ad eccezione dei
|
|
// casi di inconsistenza nella prima posizione.
|
|
|
|
{
|
|
if (logicnum == file().num())
|
|
{
|
|
next();
|
|
return file().good();
|
|
}
|
|
|
|
const int i = log2ind(logicnum);
|
|
CHECKD(i != NOTFOUND,"Nonexistent file referenced in relation ",logicnum);
|
|
|
|
for (int j = 0; j < _reldefs.items(); j++)
|
|
if (reldef(j).num() == i) break;
|
|
|
|
TLocalisamfile& from = file(i);
|
|
TLocalisamfile& to = file(reldef(j).link());
|
|
|
|
reldef(j)._first_match = FALSE;
|
|
|
|
if (from.bad())
|
|
return FALSE; // && vaffanculo();
|
|
|
|
const TRecnotype last = from.recno();
|
|
|
|
bool ok = TRUE; // Corrispondenza trovata ?
|
|
|
|
if (fieldlist == NULL)
|
|
{
|
|
TRectype rec(from.num());
|
|
reldef(j).load_rec(rec, from.curr());
|
|
|
|
from.setkey(reldef(j)._key);
|
|
from.next();
|
|
ok = (from.good() && from.curr() == rec);
|
|
for (int kk = 0; ok && kk < reldef(j)._fields.items(); kk++)
|
|
{
|
|
if (reldef(j)._forced[kk])
|
|
{
|
|
TFieldref& fl = (TFieldref&)reldef(j)._fields[kk];
|
|
const TString f_fr(fl.read(from.curr()));
|
|
const TString f_to(fl.read(rec));
|
|
|
|
ok = (f_fr == f_to);
|
|
}
|
|
}
|
|
if (ok) from.setstatus(NOERR);
|
|
}
|
|
else
|
|
{
|
|
if (nkey > 0)
|
|
from.setkey(nkey);
|
|
TToken_string fields(fieldlist);
|
|
TToken_string old(80);
|
|
for (const char* f = fields.get(0); f; f = fields.get())
|
|
old.add(from.curr().get(f));
|
|
|
|
from.next();
|
|
|
|
old.restart();
|
|
|
|
for (f = fields.get(0); f && ok; f = fields.get())
|
|
{
|
|
const TFixed_string v(from.curr().get(f));
|
|
const char* o = old.get();
|
|
if (v != o)
|
|
ok = FALSE;
|
|
}
|
|
}
|
|
|
|
if (!ok)
|
|
{
|
|
from.readat(last);
|
|
return FALSE;
|
|
}
|
|
|
|
// Riposiziona gli eventuali files successivi
|
|
position_rels(_isequal, _nolock, j+1);
|
|
reldef(j)._first_match = FALSE;
|
|
|
|
return ok;
|
|
}
|
|
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Controlla se c'e' un record ed e' il primo match (non si e' mai fatta
|
|
// <mf TRelation::position_rels>)
|
|
//
|
|
// @rdesc Ritorna TRUE se c'e' un record ed e' il primo match
|
|
bool TRelation::is_first_match(
|
|
int logicnum) // @parm Numero logico del file da controllare
|
|
{
|
|
const int i = log2ind(logicnum);
|
|
CHECKD(i != NOTFOUND,"Nonexistent file referenced in relation ",logicnum);
|
|
|
|
for (int j = 0; j < _reldefs.items(); j++)
|
|
{
|
|
TRelationdef& rdj = reldef(j);
|
|
if (rdj.num() == i)
|
|
return rdj._first_match;
|
|
}
|
|
const int err = file().status();
|
|
return err == NOERR;
|
|
}
|
|
|
|
|
|
#ifdef DBG
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Controlla se la relazione e' corretta
|
|
//
|
|
// @rdesc Ritorna i seguent valori
|
|
//
|
|
// @flag TRUE | La relazione soddisfa i criteri di correttezza
|
|
// @flag FALSE | La relazione manca di almeno uno di criteri di correttezza
|
|
bool TRelation::isconsistent(
|
|
bool reset) // @parm Indica se cercare di riportare la relazione ad uno stato
|
|
// consistente (default FALSE)
|
|
|
|
// @comm Per essere corretta una relazione necessita che tutti i file siano
|
|
// corretti, che il record corrente non sia vuoto e che la relazione sia
|
|
// consistente
|
|
// <nl>Se <p reset> e' TRUE si cerca di riportare la relazione in uno stato
|
|
// consistente (basato sul record principale). Non viene fatto nessun altro
|
|
// controllo
|
|
// <nl>Questa funzione e' chiamata internamente da <mf TRelation::update>
|
|
// e <mf TRelation::remove>.
|
|
|
|
{
|
|
const int MAXREL = 24;
|
|
int bad = 0;
|
|
TRecnotype recnos[MAXREL];
|
|
|
|
for (int i = 0; i < _files.items() && i < MAXREL; i++)
|
|
{
|
|
// must be file OK, non-empty record
|
|
bad |= file(i).good() || file(i).curr().empty();
|
|
recnos[i] = file(i).recno();
|
|
}
|
|
|
|
// if the above hold, check consistency
|
|
if (bad)
|
|
{
|
|
_errors = bad;
|
|
return FALSE;
|
|
}
|
|
|
|
position_rels(_isequal, _nolock);
|
|
for (i = 0; i < _files.items(); i++)
|
|
if (file(i).recno() != recnos[i])
|
|
{
|
|
bad = -1;
|
|
break;
|
|
}
|
|
|
|
if (reset == FALSE)
|
|
// leave as before
|
|
for(i = 0; i < _files.items(); i++)
|
|
file(i).readat(recnos[i]);
|
|
|
|
return TRUE;
|
|
}
|
|
|
|
#endif
|
|
|
|
|
|
int TRelation::write(bool force)
|
|
{
|
|
_errors = file(0).write();
|
|
if (_errors != NOERR)
|
|
return _errors;
|
|
|
|
for (int i = 0; i < _reldefs.items(); i++)
|
|
{
|
|
TRelationdef& rd = reldef(i);
|
|
TLocalisamfile& lf = file(rd.num());
|
|
|
|
if (!rd.write_enable() || lf.curr().empty())
|
|
continue;
|
|
|
|
int res = lf.write();
|
|
if (force && res == _isreinsert)
|
|
res = lf.rewrite();
|
|
if (_errors == NOERR)
|
|
_errors = res;
|
|
}
|
|
|
|
return _errors;
|
|
}
|
|
|
|
int TRelation::rewrite(bool force)
|
|
{
|
|
_errors = file(0).rewrite(); // Riscrive testata
|
|
if (force && _errors == _iskeynotfound) // Se non la trova ...
|
|
_errors = file(0).write(); // ... forza la scrittura
|
|
|
|
for (int i = 0; i < _reldefs.items(); i++)
|
|
{
|
|
TRelationdef& rd = reldef(i);
|
|
TLocalisamfile& lf = file(rd.num());
|
|
|
|
if (!rd.write_enable() || lf.curr().empty())
|
|
continue;
|
|
|
|
int res = lf.rewrite();
|
|
if (force && (res == _iskeynotfound || res == _iseof || res == _isemptyfile))
|
|
res = lf.write();
|
|
if (_errors == NOERR)
|
|
_errors = res;
|
|
}
|
|
|
|
return _errors;
|
|
}
|
|
|
|
int TRelation::remove()
|
|
{
|
|
const int res = file(0).remove();
|
|
if (_errors == NOERR && res != _iskeynotfound) _errors = res;
|
|
for (int i = 0; i < _reldefs.items(); i++)
|
|
{
|
|
TRelationdef& rd = reldef(i);
|
|
const int log = rd.num();
|
|
|
|
if (!rd.write_enable() ||
|
|
(file(log).curr()).empty()) continue;
|
|
|
|
const int res = file(log).remove();
|
|
if (_errors == NOERR && res != _iskeynotfound) _errors = res;
|
|
}
|
|
return _errors;
|
|
}
|
|
|
|
bool TRelation::exist(int logicnum) const
|
|
{
|
|
const bool lucky = log2ind(logicnum) >= 0;
|
|
return lucky;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////
|
|
// TCursor
|
|
///////////////////////////////////////////////////////////
|
|
|
|
HIDDEN bool __evalcondition(const TRelation& /* r */,TExpression* cond, const TArray& frefs)
|
|
{
|
|
for (int i = cond->numvar() - 1; i >= 0; i--)
|
|
{
|
|
const TRecfield* fr = (const TRecfield*)frefs.objptr(i);
|
|
if (fr)
|
|
cond->setvar(i, (const char*)*fr);
|
|
}
|
|
return cond->as_bool();
|
|
}
|
|
|
|
// @doc EXTERNAL
|
|
|
|
static TFilename _last_name;
|
|
static FILE* _last_ndx = NULL;
|
|
static bool _last_created = FALSE;
|
|
|
|
// @mfunc Apre il file di indice
|
|
//
|
|
// @rdesc Ritorna l'handle del file aperto
|
|
FILE* TCursor::open_index(
|
|
bool create) // @parm Indica se creare l'indice nel caso manchi (default FALSE)
|
|
{
|
|
_last_created = create;
|
|
if (_indexname.empty())
|
|
{
|
|
TString16 radix;
|
|
radix.format("c%d_", file().num());
|
|
_indexname.temp(radix);
|
|
}
|
|
|
|
if (_indexname != _last_name || create)
|
|
{
|
|
if (_last_ndx != NULL)
|
|
fclose(_last_ndx);
|
|
_last_ndx = fopen(_indexname, create ? "wb" : "rb");
|
|
if (_last_ndx == NULL)
|
|
fatal_box("Can't use cursor index for file %d: '%s'\n",
|
|
file().num(), (const char*)_indexname);
|
|
_last_name = _indexname;
|
|
}
|
|
return _last_ndx;
|
|
}
|
|
|
|
void TCursor::close_index(FILE* f)
|
|
{
|
|
CHECK(f == _last_ndx, "Bad open/close index sequence");
|
|
if (_last_created)
|
|
{
|
|
fclose(_last_ndx);
|
|
_last_ndx = NULL;
|
|
_last_name.cut(0);
|
|
_last_created = FALSE;
|
|
}
|
|
}
|
|
|
|
bool TCursor::has_simple_filter() const
|
|
{
|
|
bool yes = _filterfunction == NULL;
|
|
if (yes && _fexpr && _fexpr->numvar() > 0)
|
|
{
|
|
const RecDes& recd = *curr().rec_des(); // Descrizione del record della testata
|
|
const KeyDes& kd = recd.Ky[_nkey-1]; // Elenco dei campi della chiave del cursore
|
|
for (int i = _fexpr->numvar()-1; yes && i >= 0; i--)
|
|
{
|
|
const TString& vn = _fexpr->varname(i);
|
|
TFieldref f(vn, 0);
|
|
yes = f.file() == 0;
|
|
if (yes)
|
|
{
|
|
for (int k = kd.NkFields-1; k >= 0; k--)
|
|
{
|
|
const int nf = kd.FieldSeq[k] % MaxFields;
|
|
const RecFieldDes& rf = recd.Fd[nf];
|
|
yes = kd.FromCh[k] == 255 && f.name() == rf.Name;
|
|
if (yes) break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
return yes;
|
|
}
|
|
|
|
TRecnotype TCursor::buildcursor(TRecnotype rp)
|
|
{
|
|
TRecnotype oldrecno=0,ap = 0;
|
|
int pagecnt = 0;
|
|
const bool filtered = has_filter();
|
|
|
|
FILE* _f = open_index(TRUE);
|
|
|
|
const int fhnd = file().handle();
|
|
if (DB_reccount(fhnd) == 0)
|
|
{
|
|
close_index(_f);
|
|
return 0;
|
|
}
|
|
|
|
fseek(_f, 0L, SEEK_SET);
|
|
|
|
const int l = strlen(to());
|
|
int junk = DB_index_seek(fhnd, (char*)(const char*) from());
|
|
if (junk < 0) junk=get_error(junk);
|
|
if (junk == _iseof) return 0;
|
|
|
|
TRecnotype* page = new TRecnotype [CMAXELPAGE];
|
|
|
|
DB_index_recno(fhnd);
|
|
_pos=-1;
|
|
|
|
const bool simple_filter = has_simple_filter();
|
|
|
|
while (TRUE)
|
|
{
|
|
if (DB_index_eof(fhnd)) break;
|
|
const char* s0 = DB_index_getkey(fhnd);
|
|
if (l && (strncmp(to(), s0, l) < 0))
|
|
break;
|
|
const TRecnotype recno = DB_index_recno(fhnd);
|
|
if (recno == oldrecno)
|
|
break; // means that no more keys are available
|
|
oldrecno=recno;
|
|
if (pagecnt == CMAXELPAGE)
|
|
{
|
|
if (filtered && !simple_filter)
|
|
pagecnt = filtercursor(pagecnt,page);
|
|
fwrite(page,sizeof(TRecnotype),pagecnt,_f);
|
|
for (int i= 0; i< pagecnt; i++)
|
|
if (page[i] == rp)
|
|
{
|
|
_pos = ap + i;
|
|
break;
|
|
}
|
|
ap += pagecnt;
|
|
pagecnt = 0;
|
|
}
|
|
if (filtered && simple_filter)
|
|
{
|
|
if (simple_filtercursor(s0))
|
|
page[pagecnt++] = recno;
|
|
}
|
|
else
|
|
page[pagecnt++] = recno;
|
|
|
|
DB_index_next(fhnd);
|
|
/*
|
|
int rt=get_error(-1); // Get Last Codebase Error
|
|
if (rt != NOERR)
|
|
fatal_box("Can't read index n. %d - file n. %d",DB_tagget(fhnd), file().num());
|
|
*/
|
|
} // while
|
|
if (pagecnt)
|
|
{
|
|
if (filtered && !simple_filter)
|
|
pagecnt = filtercursor(pagecnt, page);
|
|
|
|
fwrite(page, sizeof(TRecnotype), pagecnt, _f);
|
|
for (int i = 0; i < pagecnt; i++)
|
|
if (page[i] == rp)
|
|
{
|
|
_pos = ap + i;
|
|
break;
|
|
}
|
|
ap += pagecnt;
|
|
}
|
|
delete page;
|
|
close_index(_f);
|
|
return ap;
|
|
}
|
|
|
|
int TCursor::filtercursor(int pagecnt, TRecnotype* page)
|
|
{
|
|
TLocalisamfile& fil = file();
|
|
TRectype& rec = fil.curr();
|
|
int np = 0;
|
|
|
|
for (int i = 0; i < pagecnt; i++)
|
|
{
|
|
rec.readat(fil,page[i]);
|
|
if (update_relation())
|
|
_if->update(-filter_limit());
|
|
|
|
bool ok = TRUE;
|
|
if (_filterfunction)
|
|
ok = _filterfunction(_if);
|
|
if (ok && _fexpr)
|
|
ok = __evalcondition(*_if, _fexpr, _frefs);
|
|
|
|
if (ok)
|
|
{
|
|
if (np < i) page[np] = page[i];
|
|
np++;
|
|
}
|
|
}
|
|
return np;
|
|
}
|
|
|
|
bool TCursor::simple_filtercursor(const char* key) const
|
|
{
|
|
const RecDes& recd = *curr().rec_des(); // Descrizione del record della testata
|
|
const KeyDes& kd = recd.Ky[_nkey-1]; // Elenco dei campi della chiave del cursore
|
|
|
|
TFieldref f;
|
|
for (int i = _fexpr->numvar()-1; i >= 0; i--)
|
|
{
|
|
f = _fexpr->varname(i);
|
|
int offset = 0;
|
|
for (int k = 0; k < kd.NkFields; k++)
|
|
{
|
|
const int nf = kd.FieldSeq[k] % MaxFields;
|
|
const RecFieldDes& rf = recd.Fd[nf];
|
|
int len = rf.Len;
|
|
if (f.name() == rf.Name)
|
|
{
|
|
offset += f.from();
|
|
if (f.to() > f.from())
|
|
len = f.to() - f.from();
|
|
else
|
|
len -= f.from();
|
|
char* val = (char*)(key+offset);
|
|
char oldchar = '\0';
|
|
for (int l = len; l >= 0; l--) // rtrim
|
|
{
|
|
if (l == 0 || val[l-1] != ' ')
|
|
{
|
|
oldchar = val[l];
|
|
val[l] = '\0';
|
|
break;
|
|
}
|
|
}
|
|
switch (rf.TypeF)
|
|
{
|
|
case _boolfld:
|
|
_fexpr->setvar(i, strchr("1STXY", *val)!=NULL ? "X" : " ");
|
|
break;
|
|
case _intfld:
|
|
case _longfld:
|
|
{
|
|
for (const char* v = val; *v == ' ' || *v == '0'; v++);
|
|
_fexpr->setvar(i, v);
|
|
}
|
|
break;
|
|
default:
|
|
_fexpr->setvar(i, val);
|
|
break;
|
|
}
|
|
if (oldchar)
|
|
val[l] = oldchar;
|
|
break;
|
|
}
|
|
offset += len;
|
|
}
|
|
}
|
|
return _fexpr->as_bool();
|
|
}
|
|
|
|
bool TCursor::ok() const
|
|
{
|
|
if (file().bad())
|
|
return FALSE;
|
|
|
|
const TRectype& rec = file().curr();
|
|
|
|
const TFixed_string key(rec.key(_nkey));
|
|
const TString& kf = from();
|
|
const TString& kt = to();
|
|
|
|
if (file().tab())
|
|
{
|
|
if (key.compare(kf, 3) < 0 || (kt.not_empty() && kt.compare(key, 3) < 0))
|
|
return FALSE;
|
|
}
|
|
else
|
|
{
|
|
if (key < kf || (kt.not_empty() && kt.compare(key, kt.len()) < 0))
|
|
return FALSE;
|
|
}
|
|
|
|
if (update_relation())
|
|
_if->update();
|
|
|
|
if ((_filterfunction ? _filterfunction(_if) : TRUE ) &&
|
|
(_fexpr ? __evalcondition(*_if, _fexpr, _frefs) : TRUE))
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
bool TCursor::changed()
|
|
{
|
|
if (_frozen && _lastrec > 0L)
|
|
return FALSE;
|
|
|
|
if (prefix().get_dirtype(file().num()) == _nordir &&
|
|
_index_firm != prefix().get_codditta())
|
|
return TRUE;
|
|
|
|
const int handle = file().handle();
|
|
const TRecnotype eod = DB_reccount(handle);
|
|
if (_lastrec != eod ||
|
|
_lastkrec != DB_changed(handle))
|
|
return TRUE;
|
|
|
|
if (!curr().valid())
|
|
return TRUE;
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
TRecnotype TCursor::update()
|
|
{
|
|
TWait_cursor hourglass;
|
|
|
|
file().setkey(_nkey);
|
|
if (file().curr().empty())
|
|
file().curr().zero();
|
|
file().read(_isgteq);
|
|
const TRecnotype totrec = buildcursor(file().recno());
|
|
|
|
const int handle = file().handle();
|
|
const TRecnotype eod = DB_reccount(handle);
|
|
|
|
_lastrec = eod;
|
|
_index_firm = prefix().get_codditta();
|
|
_lastkrec = DB_changed(handle);
|
|
|
|
return totrec;
|
|
}
|
|
|
|
|
|
HIDDEN void matildator(const TRectype& oldrec, int key, bool tilde, TString& str)
|
|
{
|
|
if (tilde)
|
|
{
|
|
TRectype rec(oldrec);
|
|
const RecDes* recd = rec.rec_des(); // Descrizione del record della testata
|
|
const KeyDes& kd = recd->Ky[key-1]; // Elenco dei campi della chiave
|
|
TString80 val;
|
|
for (int i = kd.NkFields-1; i >= 0; i--)
|
|
{
|
|
const int nf = kd.FieldSeq[i] % MaxFields;
|
|
const RecFieldDes& rf = recd->Fd[nf];
|
|
val = rec.get(rf.Name);
|
|
if (val.not_empty())
|
|
{
|
|
if (rf.TypeF == _alfafld && val.len() < rf.Len)
|
|
{
|
|
val.left_just(rf.Len, '~');
|
|
rec.put(rf.Name, val);
|
|
}
|
|
break;
|
|
}
|
|
}
|
|
str = rec.key(key);
|
|
}
|
|
else
|
|
str = oldrec.key(key);
|
|
str.replace('~', ' ');
|
|
}
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Setta il filtro sul cursore
|
|
void TCursor::filter(
|
|
const char* fil, // @parm Espressione del filtro
|
|
const TRectype* from, // @parm Primo record del pacchetto da esaminare
|
|
const TRectype* to, // @parm Ultimo record del pacchetto da esaminare
|
|
int tilde // @parm Flag per riempire le chiavi di ~ from(0x1) o to(0x2)
|
|
)
|
|
|
|
// @comm ATTENZIONE: non e' possibile filtrare un cursore congelato
|
|
|
|
{
|
|
TString kf(_keyfrom), kto(_keyto);
|
|
|
|
const bool filterchanged = (fil != NULL) && (_filter != fil);
|
|
|
|
if (file().tab())
|
|
{
|
|
const TTable& f = (const TTable&)file();
|
|
kf = kto = f.name();
|
|
}
|
|
if (from != NULL)
|
|
matildator(*from, _nkey, tilde & 0x1, kf);
|
|
if (to != NULL)
|
|
matildator(*to, _nkey, tilde & 0x2, kto);
|
|
|
|
if (filterchanged || (_keyfrom != kf) || (_keyto != kto))
|
|
{
|
|
CHECK(!frozen(), "Impossibile filtrare un cursore congelato");
|
|
|
|
_pos = 0;
|
|
_totrec = 0;
|
|
_lastrec = 0;
|
|
|
|
if (filterchanged)
|
|
{
|
|
_filter = fil;
|
|
if (_fexpr) delete _fexpr;
|
|
_frefs.destroy();
|
|
TTypeexp type = (_filter.find('"') != -1) ? _strexpr : _numexpr;
|
|
if (_filter.not_empty())
|
|
{
|
|
_fexpr = new TExpression(_filter, type);
|
|
if (_fexpr->type() == _numexpr)
|
|
for (int i = 0 ; i < _fexpr->numvar(); i++)
|
|
if (file().curr().type(_fexpr->varname(i)) == _alfafld)
|
|
{
|
|
_fexpr->set_type(_strexpr);
|
|
break;
|
|
}
|
|
}
|
|
else _fexpr = NULL;
|
|
if (_fexpr)
|
|
{
|
|
const int items = _fexpr->numvar();
|
|
for (int i = 0 ; i < items; i++)
|
|
{
|
|
const TString & vn = _fexpr->varname(i);
|
|
if (vn[0] != '#')
|
|
{
|
|
TFieldref f(vn, 0);
|
|
_frefs.add(new TRecfield(_if->curr(f.file()), f.name(), f.from(), f.to()), i);
|
|
}
|
|
else
|
|
NFCHECK("Variabile strana %s", (const char*)vn);
|
|
}
|
|
}
|
|
}
|
|
_keyfrom = kf;
|
|
_keyto = kto;
|
|
}
|
|
}
|
|
|
|
void TCursor::setkey(int nkey)
|
|
{
|
|
if (nkey != _nkey)
|
|
{
|
|
_lastrec = 0L;
|
|
_nkey = nkey;
|
|
file().setkey(_nkey);
|
|
filter(NULL);
|
|
}
|
|
}
|
|
|
|
int TCursor::test(TIsamop op, TReclock lockop) const
|
|
{
|
|
TLocalisamfile& curfile = file();
|
|
const TRectype& currec = curfile.curr();
|
|
curfile.setkey(_nkey);
|
|
|
|
int err = NOERR;
|
|
if (op == _isequal)
|
|
{
|
|
const TString match(currec.key(_nkey));
|
|
bool trovato = FALSE;
|
|
|
|
for (err = curfile.read(op, lockop);
|
|
err == NOERR && match == currec.key(_nkey);
|
|
err = curfile.next(lockop))
|
|
{
|
|
if (ok())
|
|
{
|
|
trovato = TRUE;
|
|
break;
|
|
}
|
|
else
|
|
{
|
|
if (lockop != _nolock)
|
|
curfile.reread(_unlock);
|
|
}
|
|
}
|
|
if (!trovato && err == NOERR)
|
|
{
|
|
err = _iskeynotfound;
|
|
curfile.setstatus(err);
|
|
}
|
|
}
|
|
else
|
|
{
|
|
for (err = curfile.read(op, lockop);
|
|
err == NOERR;
|
|
err = curfile.next(lockop))
|
|
{
|
|
if (ok())
|
|
break;
|
|
else
|
|
{
|
|
if (lockop != _nolock)
|
|
curfile.reread(_unlock);
|
|
|
|
const TString& kto = to();
|
|
if (kto.not_empty())
|
|
{
|
|
const TFixed_string curkey(currec.key(_nkey));
|
|
if (kto.compare(curkey, kto.len()) < 0)
|
|
{
|
|
err = _iseof;
|
|
break;
|
|
}
|
|
}
|
|
}
|
|
}
|
|
}
|
|
|
|
return err;
|
|
}
|
|
|
|
TRecnotype TCursor::read(TIsamop op, TReclock lockop)
|
|
{
|
|
int err = test(op, lockop);
|
|
TLocalisamfile& curfile = file();
|
|
const TRecnotype curpos = curfile.recno();
|
|
if (changed())
|
|
update();
|
|
|
|
if (err != NOERR)
|
|
{
|
|
_pos = _totrec - 1;
|
|
if (_pos < 0)
|
|
{
|
|
curfile.zero();
|
|
err = _isemptyfile;
|
|
}
|
|
else
|
|
readrec();
|
|
curfile.setstatus(err);
|
|
}
|
|
else
|
|
{
|
|
FILE* _f = open_index();
|
|
rewind(_f);
|
|
|
|
TRecnotype *page = new TRecnotype [CMAXELPAGE];
|
|
int pagecnt;
|
|
|
|
_pos = -1;
|
|
for (TRecnotype max = _totrec; _pos == -1 && max > 0; max -= pagecnt)
|
|
{
|
|
pagecnt = (max < CMAXELPAGE) ? (int)max : CMAXELPAGE;
|
|
fread(page, sizeof(TRecnotype), pagecnt, _f);
|
|
for (int i = 0; i < pagecnt; i++)
|
|
if (page[i] == curpos)
|
|
{
|
|
_pos = _totrec - max + i;
|
|
break;
|
|
}
|
|
}
|
|
delete page;
|
|
close_index(_f);
|
|
|
|
if (_pos < 0L)
|
|
_pos = 0L;
|
|
readrec();
|
|
}
|
|
|
|
return _pos;
|
|
}
|
|
|
|
|
|
TCursor::TCursor(TRelation* r, const char* fil, int nkey,
|
|
const TRectype *from, const TRectype* to, int tilde)
|
|
: _if(r), _nkey(nkey), _frozen(FALSE), _filterfunction(NULL), _fexpr(NULL),
|
|
_filter_update(FALSE), _filterfunction_update(FALSE), _filter_limit(0)
|
|
{
|
|
file().setkey(_nkey);
|
|
_pos = 0;
|
|
_totrec = 0;
|
|
_lastrec = 0;
|
|
_lastkrec = 0;
|
|
filter(fil, from, to, tilde);
|
|
}
|
|
|
|
|
|
TCursor::~TCursor()
|
|
{
|
|
if (_indexname.not_empty())
|
|
{
|
|
if (_indexname == _last_name && _last_ndx != NULL)
|
|
{
|
|
_last_created = TRUE; // Force close
|
|
close_index(_last_ndx);
|
|
}
|
|
::remove(_indexname);
|
|
}
|
|
if (_fexpr)
|
|
delete _fexpr;
|
|
}
|
|
|
|
|
|
TRecnotype TCursor::readrec()
|
|
{
|
|
TRecnotype nrec = 0L;
|
|
|
|
if (_pos >= items())
|
|
{
|
|
file().setstatus(_iseof);
|
|
curr().zero();
|
|
return nrec;
|
|
}
|
|
file().setstatus(NOERR);
|
|
|
|
FILE* _f = open_index();
|
|
if (fseek(_f, _pos * sizeof(TRecnotype), SEEK_SET) != 0)
|
|
fatal_box("Can't seek position %ld in cursor n. %d\n", _pos, file().num());
|
|
|
|
if (fread(&nrec, sizeof(TRecnotype), 1, _f) != 1)
|
|
fatal_box("Can't read position %ld in cursor n. %d\n", _pos, file().num());
|
|
|
|
close_index(_f);
|
|
|
|
curr().setdirty();
|
|
file().readat(nrec);
|
|
repos();
|
|
return nrec;
|
|
}
|
|
|
|
// @doc EXTERNAL
|
|
|
|
// @mfunc Mette un lock sul record
|
|
//
|
|
// @rdesc Ritorna il numero di errore che si verifica nel porre il lock (NOERR) se
|
|
// non si verificano errori
|
|
int TCursor::lock(
|
|
TReclock l) // @parm Tipo di lock da porre sul record (vedi <t TReclock>)
|
|
{
|
|
int rt=NOERR;
|
|
switch(l)
|
|
{
|
|
case _lock:
|
|
rt=DB_lock_rec(file().handle(),_pos);
|
|
break;
|
|
case _unlock:
|
|
rt=DB_unlock(file().handle());
|
|
break;
|
|
default:
|
|
break;
|
|
}
|
|
if (rt != NOERR) rt=get_error(rt);
|
|
return(rt);
|
|
}
|
|
|
|
TRecnotype TCursor::operator =(const TRecnotype pos)
|
|
{
|
|
if (changed())
|
|
update();
|
|
CHECKD(pos >= 0 && pos <= _totrec, "Bad cursor position : ", pos);
|
|
_pos = pos;
|
|
readrec();
|
|
|
|
return _pos;
|
|
}
|
|
|
|
TRecnotype TCursor::operator +=(const TRecnotype npos)
|
|
{
|
|
if (changed())
|
|
update();
|
|
|
|
_pos += npos;
|
|
if (_pos > _totrec)
|
|
_pos = _totrec;
|
|
else
|
|
if (_pos < 0) _pos = 0;
|
|
readrec();
|
|
|
|
return _pos;
|
|
}
|
|
|
|
TRecnotype TCursor::items()
|
|
{
|
|
if (changed())
|
|
update();
|
|
return _totrec;
|
|
}
|
|
|
|
bool TCursor::next_match(int lognum, const char* fl, int nk)
|
|
{
|
|
if (lognum == 0 || lognum == file().num())
|
|
{
|
|
++(*this);
|
|
return file().good();
|
|
}
|
|
else
|
|
return _if->next_match(lognum, fl, nk);
|
|
}
|
|
|
|
bool TCursor::is_first_match(int ln)
|
|
{
|
|
return (ln == 0 || ln == file().num()) ?
|
|
(_pos == 0 && file().good()) : (_if->is_first_match(ln));
|
|
}
|
|
|
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///////////////////////////////////////////////////////////
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// TSorted_cursor
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///////////////////////////////////////////////////////////
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typedef struct
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{
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char f[256];
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TRecnotype p;
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} El_To_Sort;
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// @doc EXTERNAL
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// @mfunc Controlla la validita' dell'espressione
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//
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// @rdesc Ritorna se si tratta di una espressione valida
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bool TSorted_cursor::check_expr(
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TString& s) // @parm Espressione da controllare
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// @comm Modifica l'espressione in modo da avere una valido parametro per TFieldref!
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// <nl>Es. UPPER(20->RAGSOC[1,40]+) ==> 20->RAGSOC[1,40]+
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// <nl>N.B.: la direzione dell'ordinamento va messa indicata sempre dopo la definizione del campo, mai
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// dopo l'operatore UPPER(). E' a cura delle altre funzioni esterne che utilizzano la check_expr()
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// discriminare il segno + o - che sia.
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{
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int p=s.find('(');
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int p1=s.find(')');
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bool rt=TRUE;
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if (p>-1 && p1>-1)
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if (s.find("UPPER") < 0)
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{
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error_box("Only UPPER() operator is allowed");
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rt=FALSE;
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}
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else
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{
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s=s.mid(6,s.len()-7);
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p=s.find('(');
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p1=s.find(')');
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if (p>-1 || p1 >-1)
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{
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error_box("Too many parentheses!");
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rt=FALSE;
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}
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}
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else
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if ((p>-1 && p1==-1) || (p==-1 && p1>-1))
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{
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error_box("Unbalanced parentheses in expression");
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rt=FALSE;
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}
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return rt;
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}
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bool TSorted_cursor::is_upper(TString& s)
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// Controlla se nell'espressione esiste l'operatore UPPER()
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{
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bool rt=FALSE;
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if (s.find("UPPER") >= 0)
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rt = check_expr(s);
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return rt;
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}
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TRecnotype TSorted_cursor::buildcursor(TRecnotype rp)
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{
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TRecnotype oldrecno=0,pos,ap = 0;
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int abspos=0,junk, l, pagecnt = 0;
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const bool filtered = has_filter();
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TString s;
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_sort = new TSort(sizeof(El_To_Sort));
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_order_expr.restart();
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while ((s=_order_expr.get()).not_empty())
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{
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check_expr(s); // Toglie l'eventuale operatore UPPER(), in modo che l'ultimo carattere
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// indichi eventualmente la direzione dell'ordinamento
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char versus = (s.right(1)=="-") ? 'd' : 'a';
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if (s.right(1) == "-" || s.right(1) == "+")
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s.cut(s.len()-1);
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TFieldref f(s,0);
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// Il controllo del file e' automatico in f.len()
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int n = f.file();
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int flen = f.len(n<0 ? relation()->lfile(n).curr() : relation()->curr());
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_sort->addsortkey(abspos+f.from(),flen,versus);
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CHECKS(flen!=0,"Field can not have null length: ",(const char *) s);
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const TRectype& r = relation()->lfile(n).curr();
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abspos+=r.length(f.name());
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CHECKD(abspos<=256,"Cannot exceed 256 bytes-key %d",abspos);
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}
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_sort->init();
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FILE* _f = open_index(TRUE);
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if (file().empty())
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{
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close_index(_f);
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return 0;
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}
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const int handle = file().handle();
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fseek(_f, 0L, SEEK_SET);
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l = strlen(to());
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junk=DB_index_seek(handle, (char*)(const char*) from());
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if (junk < 0) junk=get_error(junk);
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if (junk == _iseof) return 0;
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TRecnotype* page = new TRecnotype [CMAXELPAGE];
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pos = DB_index_recno(handle);
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TCursor::pos()=-1;
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while (TRUE)
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{
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if (DB_index_eof(handle)) break;
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const char* s0 = DB_index_getkey(handle);
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const TRecnotype recno = DB_index_recno(handle);
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if (l && (strncmp(to(), s0, l) < 0)) break;
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if (recno == oldrecno) break; // means that no more keys are available
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oldrecno=recno;
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if (pagecnt == CMAXELPAGE)
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{
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pagecnt = filtercursor(pagecnt,page);
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for (int i= 0; i< pagecnt; i++)
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if (page[i] == rp)
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{
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TCursor::pos() = ap + i;
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break;
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}
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ap += pagecnt;
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pagecnt = 0;
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}
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page[pagecnt++] = recno; // lasciare cosi' altrimenti la readat legge due volte lo stesso record
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long rec = DB_index_next(handle);
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if (rec < 0)
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fatal_box("Can't read index n. %d - file n. %d",file().getkey(),file().num());
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} // while
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if (pagecnt)
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{
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pagecnt = filtercursor(pagecnt, page);
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for (int i = 0; i < pagecnt; i++)
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if (page[i] == rp)
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{
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TCursor::pos() = ap + i;
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break;
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}
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ap += pagecnt;
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}
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_sort->endsort();
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ap = 0;
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pagecnt = 0;
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El_To_Sort* Element = NULL;
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while ((Element=(El_To_Sort *)_sort->retrieve()) != NULL)
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{
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page[pagecnt++]=Element->p;
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if (pagecnt==CMAXELPAGE)
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{
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fwrite(page,sizeof(TRecnotype),pagecnt,_f);
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pagecnt=0;
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}
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ap++;
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}
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if (pagecnt)
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fwrite(page,sizeof(TRecnotype),pagecnt,_f);
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// if (TCursor::pos() == -1) pos=0; // Guy: Non serve ad una cippa!
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delete page;
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if (_sort) delete _sort;
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close_index(_f);
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return ap;
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}
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const char* TSorted_cursor::fill_sort_key(char* k)
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{
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TString16 fmt;
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TString sf;
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*k = '\0';
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for (TString80 s = _order_expr.get(0); s.not_empty(); s = _order_expr.get())
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{
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const bool is_up = is_upper(s);
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const int p = s.find('[');// Qui estrae il nome del campo:
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if (p >= 0) // rimane solo l'indicazione del file (eventuale)
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s.cut(p); // ed il nome del campo:
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else // UPPER(20->RAGSOC[1,30]+) --->> 20->RAGSOC
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{
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const char last = s.right(1)[0];
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if (last == '-' || last == '+')
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s.rtrim(1);
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}
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const TFieldref f(s,0);
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sf = f.read(*relation());
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const TRectype& frec = curr(f.file());
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const TFieldtypes fld_type = frec.type(f.name());
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if (fld_type == _datefld) // Se il campo e' di tipo data, la converte in ANSI!
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{
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TDate d(sf);
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sf=d.string(ANSI);
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}
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if (is_up) sf.upper();
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if (fld_type == _alfafld || fld_type == _datefld)
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fmt.format("%%-%ds",f.len(frec));
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else
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fmt.format("%%%ds",f.len(frec));
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strcat(k, format(fmt, (const char*)sf));
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}
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return k;
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}
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int TSorted_cursor::filtercursor(int pagecnt, TRecnotype* page)
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{
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int np=0 /*, handle=file().filehnd()->fhnd */;
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TRectype& rec=file().curr();
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TString s, sf, fmt;
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El_To_Sort Element;
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for (int i=0; i< pagecnt; i++)
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{
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file().readat(rec,page[i]);
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if (update_relation())
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relation()->update(-filter_limit());
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if ((filterfunction() ? filterfunction()(relation()) : TRUE ) &&
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(expression() ? __evalcondition(*relation(), expression(), field_refs()) : TRUE))
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{
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if (np < i) page[np] = page[i];
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np++;
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fill_sort_key(Element.f);
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Element.p=page[i];
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_sort->sort((char *) &Element);
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}
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}
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return np;
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}
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bool TSorted_cursor::changed()
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{
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bool rt = FALSE;
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if (_is_valid_expr)
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{
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rt = TCursor::changed();
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if (!rt) rt=_is_changed_expr;
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_is_changed_expr = FALSE;
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}
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else
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NFCHECK("Can't perform changed() while sorted cursor expression is not valid!");
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return rt;
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}
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TRecnotype TSorted_cursor::read(TIsamop op, TReclock lockop)
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{
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TString256 searching; fill_sort_key(searching.get_buffer());
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searching.rtrim();
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const int cmplen = searching.len();
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TRecnotype first = 0L;
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TRecnotype last = items()-1;
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TRecnotype found = -1L;
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const bool ghiacciato = !frozen();
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if (ghiacciato) freeze(TRUE);
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TString256 testing;
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while (first <= last)
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{
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const TRecnotype test = (first+last)/2;
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TCursor::operator=(test);
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fill_sort_key(testing.get_buffer());
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const int cmp = searching.compare(testing, cmplen);
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if (cmp == 0)
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{
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if (op != _isgreat)
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{
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if (found < 0l || test < found)
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found = test;
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last = test-1;
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}
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else
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first = test+1;
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}
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else
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{
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if (cmp < 0)
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{
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last = test-1;
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if (op != _isequal)
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{
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if (found < 0l || test < found)
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found = test;
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}
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}
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else
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first = test+1;
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}
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}
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if (found >= 0L)
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{
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TCursor::operator=(found);
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file().setstatus(NOERR);
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if (lockop != _nolock)
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lock(lockop);
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}
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else
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{
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found = items()-1;
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if (found >= 0)
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TCursor::operator=(found);
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file().setstatus(op == _isequal ? _iskeynotfound : _iseof);
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}
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if (ghiacciato) freeze(FALSE);
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return found;
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}
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void TSorted_cursor::change_order(const char* order_expr)
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{
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if (order_expr && *order_expr && _order_expr != order_expr)
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{
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TString s;
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_order_expr = order_expr;
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_order_expr.restart();
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while ((s=_order_expr.get()).not_empty() && (_is_valid_expr=check_expr(s))) ;
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if (_is_valid_expr)
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_is_changed_expr=TRUE;
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}
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}
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TSorted_cursor::TSorted_cursor(TRelation *f, const char * order_expr, const char * filter, int key, const TRectype* from, const TRectype* to)
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: TCursor(f,filter,key,from,to)
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{
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change_order(order_expr);
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}
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TSorted_cursor::~TSorted_cursor()
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{
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}
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///////////////////////////////////////////////////////////
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// TFieldRef
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///////////////////////////////////////////////////////////
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// @doc EXTERNAL
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// @func Converte una stringa in numero logico o numero tabella
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//
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// @rdesc Ritorna il numero logico del file o il numero della tabella
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int name2log(
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const char* name) // @parm Stringa da convertire
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{
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int log = 0;
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if (name)
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while (*name == ' ') name++;
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if (name && *name)
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{
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if (isdigit(*name) || *name == '-')
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{
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log = atoi(name);
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if (strchr(name, '@')) log = -log;
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}
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else
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{
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const int len = strlen(name);
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if (len == 3 || len == 4)
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log = TTable::name2log(name);
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}
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CHECKS(log != 0, "Non e' un file ne' una tabella: ", name);
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}
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return log;
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}
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TFieldref::TFieldref() : _fileid(0), _name(0) {}
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TFieldref::TFieldref(const TString& s, short defid)
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{
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operator=(s);
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if (_fileid == 0) _fileid = defid;
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}
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void TFieldref::copy(const TFieldref& f)
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{
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_fileid = f._fileid;
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_id = f._id;
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_name = f._name;
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_from = f._from;
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_to = f._to;
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}
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TObject* TFieldref::dup() const
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{
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TFieldref* f = new TFieldref(*this);
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return f;
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}
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// @doc EXTERNAL
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// @mfunc Operatore di assegnamento
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//
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// @rdesc Ritorna l'oggetto assegnato
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TFieldref& TFieldref::operator =(
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const TString& s) // @parm Stringa da assegnare all'oggetto
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// @comm Un <c TFildref> deve avere il seguente formato (solamente NAME e il mandante):
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// <nl>FILE->NAME[FROM,TO]
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{
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int pos = s.find("->");
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if (pos > 0)
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{
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_id = s.left(pos); _id.strip(" ");
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_fileid = name2log(_id);
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pos += 2;
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}
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else
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{
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_id.cut(0);
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_fileid = pos = 0;
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}
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int par = s.find('[', pos); // Cerca la fine del nome del campo
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_name = s.sub(pos, par); // Estrae il nome del campo
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_name.strip(" "); // Elimina eventuali spazi superflui
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if (par > 0)
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{
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pos = par+1;
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set_from(atoi(s.mid(pos)));
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par = s.find(',', pos);
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if (par > 0) set_to(atoi(s.mid(par+1)));
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else set_to(from()+1);
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}
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else
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{
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set_from(0);
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set_to(-1);
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}
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return *this;
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}
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void TFieldref::set_file(int f)
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{
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_id.cut(0);
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if (f != 0)
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{
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_fileid = f;
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_id << abs(f);
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if (f < 0) _id << '@';
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}
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else _fileid = 0;
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}
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void TFieldref::print_on(ostream& out) const
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{
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if (_id.not_empty()) out << _id << "->";
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out << _name;
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if (_from > 0 || _to > 0)
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{
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out << '[' << (_from+1);
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out << ',' << _to << ']';
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}
|
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}
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static TString buffer;
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const char* TFieldref::read(TConfig& ini, const char* defpar) const
|
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{
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ini.set_paragraph(_id.empty() ? defpar : _id);
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if (!ini.exist(_name))
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return "";
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|
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buffer = ini.get(_name);
|
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if (_from > 0 || _to > 0)
|
|
{
|
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const int l = buffer.len();
|
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if (_to < l && _to > 0) buffer.cut(_to);
|
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if (_from > 0) buffer.ltrim(_from);
|
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}
|
|
else
|
|
{
|
|
// Gestisce valori tra virgolette
|
|
const int last = buffer.len()-1;
|
|
if (last > 0)
|
|
{
|
|
if ((buffer[0] == '"' || buffer[0] == '\'') && buffer[0] == buffer[last])
|
|
{
|
|
buffer.cut(last);
|
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buffer.ltrim(1);
|
|
if (strchr(buffer, '\\'))
|
|
buffer = esc(buffer);
|
|
}
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
static int quotes_needed(const char* val)
|
|
{
|
|
int yes = 0;
|
|
for ( ; *val; val++) if (strchr("\t\n\r\"' ", *val))
|
|
{
|
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yes = 1;
|
|
if (*val < ' ')
|
|
{
|
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yes = 2;
|
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break;
|
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}
|
|
}
|
|
return yes;
|
|
}
|
|
|
|
static void escapes(TString& val)
|
|
{
|
|
for (int i = 0; val[i]; i++)
|
|
{
|
|
if (val[i] == '\n')
|
|
{
|
|
val.insert(" ", i);
|
|
val[i++] = '\\';
|
|
val[i] = 'n';
|
|
} else
|
|
if (val[i] == '\r')
|
|
{
|
|
val.insert(" ", i);
|
|
val[i++] = '\\';
|
|
val[i] = 'r';
|
|
} else
|
|
if (val[i] == '\t')
|
|
{
|
|
val.insert(" ", i);
|
|
val[i++] = '\\';
|
|
val[i] = 't';
|
|
}
|
|
}
|
|
}
|
|
|
|
void TFieldref::write(TConfig& ini, const char* defpar, const char* val) const
|
|
{
|
|
if ((val == NULL || *val == '\0') && !ini.exist(_name))
|
|
return;
|
|
|
|
const char* para = _id.empty() ? defpar : _id;
|
|
if (_from > 0 || _to > 0)
|
|
{
|
|
buffer = ini.get(_name, para);
|
|
buffer.overwrite(val, _from + (buffer[0] == '"'));
|
|
if (buffer[0] == ' ') // Metto le virgolette
|
|
{ buffer.insert("\"", 0); buffer << '"'; }
|
|
ini.set(_name, buffer, para);
|
|
}
|
|
else
|
|
{
|
|
const int qn = quotes_needed(val); // Controlla se c'e' bisogno di virgolette
|
|
if (qn)
|
|
{
|
|
if (qn == 2)
|
|
{
|
|
buffer = val;
|
|
escapes(buffer);
|
|
buffer.insert("\"", 0);
|
|
buffer << '"';
|
|
}
|
|
else
|
|
{
|
|
const char virg = strchr(val, '"') ? '\'' : '"';
|
|
buffer.cut(0);
|
|
buffer << virg << val << virg;
|
|
}
|
|
ini.set(_name, buffer, para);
|
|
}
|
|
else
|
|
ini.set(_name, val, para);
|
|
}
|
|
}
|
|
|
|
const char* TFieldref::read(const TRectype& rec) const
|
|
{
|
|
if (_fileid >= CNF_GENERAL)
|
|
{
|
|
TToken_string s(_name, '.');
|
|
TConfig c(_fileid - CNF_STUDIO, s.get(0));
|
|
buffer = c.get(s.get());
|
|
}
|
|
else
|
|
{
|
|
buffer = _name; buffer.upper();
|
|
buffer = rec.get(buffer);
|
|
if (_from > 0 || _to > 0)
|
|
{
|
|
const int l = buffer.len();
|
|
if (_to < l && _to > 0) buffer.cut(_to);
|
|
if (_from > 0) buffer.ltrim(_from);
|
|
}
|
|
}
|
|
return buffer;
|
|
}
|
|
|
|
const char* TFieldref::read(const TRelation& r) const
|
|
{
|
|
const TRectype& rec = _id.empty() ? r.curr() : r.lfile(_id).curr();
|
|
const char *s = read(rec);
|
|
return s;
|
|
}
|
|
|
|
void TFieldref::write(const char* val, TRelation& r) const
|
|
{
|
|
TRectype &rec = _id.empty() ? r.curr() : r.lfile(_id).curr();
|
|
write(val, rec);
|
|
}
|
|
|
|
|
|
void TFieldref::write(const char* val, TRectype& rec) const
|
|
{
|
|
if (_fileid >= CNF_GENERAL) return;
|
|
if (_from > 0 || _to > 0)
|
|
{
|
|
buffer = rec.get(_name);
|
|
if (_to <= _from)
|
|
((TFieldref*)this)->_to = rec.length(_name);
|
|
buffer.overwrite(val, _from, _to - _from);
|
|
rec.put(_name, buffer);
|
|
}
|
|
else
|
|
{
|
|
rec.put(_name, val);
|
|
}
|
|
}
|
|
|
|
int TFieldref::len(const TRectype &rec) const
|
|
{
|
|
if (_to > _from)
|
|
return _to - _from;
|
|
if (_fileid <= 0)
|
|
return rec.length(_name) - _from;
|
|
|
|
const TRectype r(_fileid);
|
|
const int len = r.length(_name);
|
|
return len - _from;
|
|
}
|
|
|
|
///////////////////////////////////////////////////////////
|
|
// TRelation_description
|
|
///////////////////////////////////////////////////////////
|
|
|
|
|
|
void TRelation_description::init_files_array()
|
|
{
|
|
const TLocalisamfile& f = _rel->file();
|
|
TToken_string s(128);
|
|
print_name(s, f); // Logic number
|
|
|
|
const char* name = f.name();
|
|
if (f.tab())
|
|
name = TDir::tab_des(name);
|
|
else
|
|
name = prefix().description(name);
|
|
s.add(name); // Description
|
|
s.add(" "); // No join
|
|
s.add(f.getkey()); // Key
|
|
s.add(" | "); // No Alias nor expression
|
|
|
|
_files.destroy();
|
|
_files.add(s); // Main file
|
|
for (int i = 0; i < _rel->items(); i++)
|
|
{
|
|
_rel->reldef(i).print_on(s);
|
|
_files.add(s);
|
|
}
|
|
}
|
|
|
|
|
|
void TRelation_description::read_rel()
|
|
{
|
|
// scan files and build description arrays
|
|
init_files_array();
|
|
|
|
_fields.destroy();
|
|
for (int i = 0; i < _files.items(); i++)
|
|
{
|
|
TToken_string& tt = (TToken_string&)_files[i];
|
|
TFilename descfname; descfname << DESCDIR << "/d";
|
|
|
|
const char* tn = tt.get(0); // Codice del file o tabella
|
|
|
|
int which_file = atoi(tn); // Non spostare questa riga (tn puo' cambiare!)
|
|
if (which_file == 0)
|
|
which_file = TTable::name2log(tn); // Numero logico del file
|
|
|
|
if (tn[0] == '%' || tn[0] == '$')
|
|
descfname << (tn+1);
|
|
else
|
|
descfname << tn;
|
|
descfname << ".des";
|
|
|
|
TConfig conf(descfname, DESCPAR);
|
|
// new record descriptor for _fields array
|
|
TString_array* rdesc = new TString_array;
|
|
|
|
TTrec trec; trec.get(which_file);
|
|
TToken_string ttmp(64);
|
|
TString dfld(256);
|
|
|
|
for (int f = 0; f < trec.fields(); f++)
|
|
{
|
|
ttmp = trec.fielddef(f);
|
|
const TString16 name(ttmp.get(0));
|
|
if (!name.blank())
|
|
{
|
|
dfld = conf.get(name, NULL, -1, "Missing description");
|
|
if (!dfld.blank() && dfld[0] != '#')
|
|
{
|
|
ttmp.add(dfld,4);
|
|
// contiene: nome campo, tipo, lunghezza, decimali, descrizione
|
|
rdesc->add(ttmp);
|
|
}
|
|
}
|
|
}
|
|
|
|
_fields.add(rdesc, i);
|
|
}
|
|
}
|
|
|
|
// @doc INTERNAL
|
|
|
|
// @mfunc Cambia la relazione descritta
|
|
void TRelation_description::change_relation(
|
|
TRelation& r, // @parm Nuova relazione da assegnare
|
|
TString_array& a) // @parm Array di descrittore dei file
|
|
{
|
|
_rel = &r;
|
|
read_rel();
|
|
if (a.items() > 0)
|
|
_files = a;
|
|
}
|
|
|
|
void TRelation_description::print_on(ostream& out) const
|
|
{
|
|
for (int i = 0; i < _files.items(); i++)
|
|
{
|
|
TToken_string& r = ((TRelation_description*)this)->_files.row(i);
|
|
TString16 cod(r.get(4));
|
|
if (atoi(cod) == 0)
|
|
cod = r.get(0);
|
|
else
|
|
cod << '@';
|
|
out << " " << cod << "->* ";
|
|
out << "\"" << r.get(1) << "\"\n";
|
|
}
|
|
}
|
|
|
|
// @doc INTERNAL
|
|
|
|
// @mfunc Seleziona un file
|
|
//
|
|
// @rdesc Ritorna il risultato dell'operazione:
|
|
//
|
|
// @flag TRUE | E' stato selzionato il file
|
|
// @flag FALSE | Non e' riuscito a selezionare il file
|
|
bool TRelation_description::choose_file(
|
|
int file) // @parm Numero logico del file da selezionare (default 0)
|
|
|
|
// @comm Dopo aver scelto un file (occorre che ritorni TRUE) i metodi della classe
|
|
// permettono di conoscere tutti i dati riguardanti i parametri del file selezionato
|
|
|
|
{
|
|
TArray_sheet sht(-1,-1,-4,-4,"Selezione archivio", "Codice|Descrizione archivio@70");
|
|
TToken_string tt(80);
|
|
|
|
int sel = 0;
|
|
|
|
for (int i = 0; i < _files.items(); i++)
|
|
{
|
|
TToken_string& tf = _files.row(i);
|
|
tt = tf.get(4);
|
|
|
|
int num = atoi(tt);
|
|
if (num == 0)
|
|
{
|
|
tt = tf.get(0);
|
|
num = atoi(tt);
|
|
if (sel == 0 && file > 0 && num == file)
|
|
sel = i;
|
|
}
|
|
else
|
|
{
|
|
if (sel == 0 && file < 0 && num == -file)
|
|
sel = i;
|
|
tt << '@';
|
|
}
|
|
|
|
tt.add(tf.get(1));
|
|
sht.add(tt);
|
|
}
|
|
|
|
sht.select(sel);
|
|
|
|
if (sht.run() == K_ENTER)
|
|
{
|
|
_cur_file = (int)sht.selected();
|
|
_cfile = _files.row(_cur_file);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
// @doc INTERNAL
|
|
|
|
// @mfunc Seleziona un campo <p fld> del file selezionato
|
|
//
|
|
// @rdesc Ritorna il risultato dell'operazione:
|
|
//
|
|
// @flag TRUE | E' stato selzionato il campo
|
|
// @flag FALSE | Non e' riuscito a selezionare il campo
|
|
bool TRelation_description::choose_field(
|
|
const char* fld) // @parm Nome del campo da selezionare (default "")
|
|
|
|
// @comm Occorre che sia selezionato un file, diversamente viene considerato
|
|
// selezionato il primo file
|
|
{
|
|
TArray_sheet sht(-1,-1,76,20,"Selezione campo",
|
|
"Campo@10|Descrizione@50|Tipo@10|Dim.");
|
|
TString_array& fd = (TString_array&)_fields[_cur_file];
|
|
TToken_string tt(80);
|
|
|
|
int sel = 0;
|
|
for (int i = 0; i < fd.items(); i++)
|
|
{
|
|
TToken_string& tf = fd.row(i);
|
|
tt = tf.get(0);
|
|
if (sel == 0 && tt == fld)
|
|
sel = i;
|
|
tt.add(tf.get(4));
|
|
tt.add(field_type_str((TFieldtypes)tf.get_int(1)));
|
|
tt.add(tf.get(2));
|
|
sht.add(tt);
|
|
}
|
|
|
|
sht.select(sel);
|
|
if (sht.run() == K_ENTER)
|
|
{
|
|
_cur_field = (int)sht.selected();
|
|
_cfield = fd.row(_cur_field);
|
|
return TRUE;
|
|
}
|
|
return FALSE;
|
|
}
|
|
|
|
// @doc INTERNAL
|
|
|
|
// @mfunc Costruisce un menu
|
|
//
|
|
// @rdesc Ritorna solamente FALSE
|
|
bool TRelation_description::build_menu(
|
|
const char* title) // @parm Titolo del menu'
|
|
|
|
// @comm Costruisce un albero di menu' e setta il campo corrente quando viene
|
|
// selezionato (deve essere popup)
|
|
//
|
|
// @devnote Funzione non implementata.
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
bool TRelation_description::remove_menu()
|
|
{
|
|
return FALSE;
|
|
}
|
|
|
|
bool TRelation_description::set_cur_file(int id)
|
|
{
|
|
const int n = _rel->log2ind(id);
|
|
if (n >= 0 && n != _cur_file)
|
|
{
|
|
_cur_file = n;
|
|
_cfile = _files.row(n);
|
|
}
|
|
return n >= 0;
|
|
}
|
|
|
|
int TRelation_description::file_num()
|
|
{
|
|
int n = -_cfile.get_int(4);
|
|
if (n == 0)
|
|
n = _cfile.get_int(0);
|
|
return n;
|
|
}
|
|
|
|
const char* TRelation_description::file_desc()
|
|
{
|
|
return _cfile.get(1);
|
|
}
|
|
|
|
void TRelation_description::file_desc(const char* desc)
|
|
{
|
|
_cfile.add(desc, 1);
|
|
_files.row(_cur_file) = _cfile;
|
|
}
|
|
|
|
|
|
const char* TRelation_description::field_desc()
|
|
{
|
|
return _cfield.get(4);
|
|
}
|
|
|
|
const char* TRelation_description::field_name()
|
|
{
|
|
return _cfield.get(0);
|
|
}
|
|
|
|
int TRelation_description::field_len()
|
|
{
|
|
return _cfield.get_int(2);
|
|
}
|
|
|
|
TFieldtypes TRelation_description::field_type()
|
|
{
|
|
return (TFieldtypes)_cfield.get_int(1);
|
|
}
|
|
|
|
// @doc INTERNAL
|
|
|
|
// @mfunc Setta la descrizione del campo
|
|
//
|
|
// @rdesc Ritorna se ha trovato il campo da settare
|
|
bool TRelation_description::set_field_description(
|
|
const char* field, // @parm Campo a cui assegnare la descrizione
|
|
const char* des) // @parm Descrizione da assgnare al campo
|
|
{
|
|
TString_array& fld = (TString_array&)_fields[_cur_file];
|
|
|
|
for (int i = 0; i < fld.items(); i++)
|
|
{
|
|
TToken_string& tt = fld.row(i);
|
|
if (strcmp(tt.get(0),field) == 0)
|
|
{
|
|
if (des && *des)
|
|
tt.add(des, 4);
|
|
else
|
|
{
|
|
fld.destroy(i);
|
|
fld.pack();
|
|
}
|
|
return TRUE;
|
|
}
|
|
}
|
|
|
|
if (des && *des)
|
|
{
|
|
TToken_string tt(80);
|
|
tt.add(field);
|
|
tt.add(des, 4);
|
|
fld.add(tt);
|
|
return TRUE;
|
|
}
|
|
|
|
return FALSE;
|
|
}
|
|
|
|
const char* TRelation_description::get_field_description(const char* field)
|
|
{
|
|
TString_array& fld = (TString_array&)_fields[_cur_file];
|
|
|
|
for (int i = fld.items()-1; i >= 0; i--)
|
|
{
|
|
TToken_string& tt = fld.row(i);
|
|
if (strcmp(tt.get(0),field) == 0)
|
|
return tt.get(4);
|
|
}
|
|
return "";
|
|
}
|
|
|
|
|
|
TRelation_description::TRelation_description(TRelation& r)
|
|
: _rel(&r), _menu(FALSE), _cur_file(0), _cur_field(0),
|
|
_cfile(80), _cfield(80)
|
|
{
|
|
read_rel();
|
|
if (_files.items() > 0)
|
|
{
|
|
_cfile = _files.row(0);
|
|
_cfield = "";
|
|
}
|
|
}
|
|
|
|
TRelation_description::~TRelation_description()
|
|
{
|
|
if (_menu) remove_menu();
|
|
}
|
|
|
|
|
|
////////////////////////////////////
|
|
// TSortedfile
|
|
////////////////////////////////////
|
|
// @mfunc Avanza di <p npos> record
|
|
int TSortedfile::operator +=(const TRecnotype npos)
|
|
{
|
|
int err = NOERR;
|
|
TRecnotype p = _curs->pos() + npos;
|
|
if (p < 0)
|
|
{
|
|
p = 0;
|
|
err = _isbof;
|
|
}
|
|
if (p >= _curs->items())
|
|
{
|
|
err = _iseof;
|
|
p = _curs->items();
|
|
}
|
|
*_curs = p;
|
|
setstatus(err);
|
|
return err;
|
|
}
|
|
// @mfunc Sposta indietro di <p npos> record
|
|
int TSortedfile::operator -=(const TRecnotype npos)
|
|
{
|
|
return operator+=(-npos);
|
|
}
|
|
// @mfunc Avanza al record successivo
|
|
int TSortedfile::operator ++()
|
|
{
|
|
return *this+=1;
|
|
}
|
|
// @mfunc Indietreggia al record precedente
|
|
int TSortedfile::operator --()
|
|
{
|
|
return *this-=1;
|
|
}
|
|
|
|
// @mfunc Si posiziona sul primo record del file (vedi <t TReclock>)
|
|
int TSortedfile::first(word lockop)
|
|
{
|
|
int err = _curs->items() > 0 ? NOERR : _iseof;
|
|
_curs->first_item();
|
|
setstatus(err);
|
|
return err;
|
|
}
|
|
// @mfunc Si posiziona sull'ultimo record del file (vedi <t TReclock>)
|
|
int TSortedfile::last(word lockop)
|
|
{
|
|
int err = _curs->items() > 0 ? NOERR : _iseof;
|
|
_curs->last_item();
|
|
setstatus(err);
|
|
return err;
|
|
}
|
|
// @mfunc Si posiziona sul successivo record del file (vedi <t TReclock>)
|
|
int TSortedfile::next(word lockop )
|
|
{
|
|
int err = _curs->pos() < _curs->items() ? NOERR : _iseof;
|
|
if (err == NOERR)
|
|
_curs->succ_item();
|
|
setstatus(err);
|
|
return err;
|
|
}
|
|
// @mfunc Si posiziona sul precedente record del file (vedi <t TReclock>)
|
|
int TSortedfile::prev(word lockop )
|
|
{
|
|
int err = _curs->pos() > 0 ? NOERR : _isbof;
|
|
if (err == NOERR)
|
|
_curs->pred_item();
|
|
setstatus(err);
|
|
return err;
|
|
}
|
|
|
|
// @mfunc Salta <p nrec> record dalla posizione corrente (vedi <t TReclock>)
|
|
int TSortedfile::skip(TRecnotype nrec, word lockop )
|
|
{
|
|
*_curs += nrec; // manca il lock...
|
|
setstatus(_curs->file().status());
|
|
NFCHECK("Operazione 'skip' non consentita sul cursore");
|
|
return 0;
|
|
}
|
|
|
|
// @mfunc Rilegge l'ultimo record letto (vedi <t TReclock>)
|
|
int TSortedfile::reread(word lockop )
|
|
{
|
|
return reread(curr(),lockop);
|
|
}
|
|
// @mfunc Rilegge l'ultimo record letto e lo copia in <p rec> (vedi <t TReclock>)
|
|
int TSortedfile::reread(TRectype& rec, word lockop)
|
|
{
|
|
return 0;
|
|
}
|
|
|
|
|
|
// @mfunc Legge il record (vedi <t TReclock> e <t TIsamop>)
|
|
int TSortedfile::read(word op , word lockop )
|
|
{
|
|
return read(curr(),op,lockop);
|
|
}
|
|
// @mfunc Legge il record e lo copia in <p rec> (vedi <t TReclock> e <t TIsamop>)
|
|
int TSortedfile::read(TRectype& rec, word op , word lockop )
|
|
{
|
|
if (&curr() != &rec)
|
|
curr() = rec;
|
|
_curs->read((TIsamop)op,(TReclock)lockop);
|
|
setstatus(_curs->file().status());
|
|
if (&curr() != &rec)
|
|
rec = curr();
|
|
return status();
|
|
}
|
|
|
|
// @mfunc Legge il record alla posizione <p nrec> e lo copia in <p rec> (vedi <t TReclock>)
|
|
int TSortedfile::readat(TRectype& rec, TRecnotype nrec, word lockop )
|
|
{
|
|
// read(rec,_isequal,lockop);
|
|
// !!!!!!!!!!!!!! attenzione !!!!!!!!!!!!!!
|
|
// non usare un sorted file come file principale di un sorted cursor;
|
|
// portare invece le espressioni del sorted file a livello di cursore
|
|
// altrimenti questa readat non sempre funziona , perche' viene chiamata con
|
|
// parametri presi dalle funzioni a basso livello sugli isam, quindi relativi alle posizioni fisiche
|
|
// e non a quanto restituito da recno() (che da' la posizione all'interno del cursore)
|
|
*_curs=nrec;
|
|
if (&curr() != &rec)
|
|
rec=curr();
|
|
setstatus(_curs->file().status());
|
|
return status();
|
|
}
|
|
// @mfunc Legge il record alla posizione <p nrec> e lo copia in <p rec> (vedi <t TReclock>)
|
|
int TSortedfile::readat(TRecnotype nrec, word lockop )
|
|
{
|
|
return readat(curr(),nrec, lockop );
|
|
}
|
|
|
|
// @mfunc Aggiunge un record
|
|
int TSortedfile::write()
|
|
{
|
|
return write(curr());
|
|
}
|
|
// @mfunc Aggiunge un record copiando da <p rec>
|
|
int TSortedfile::write(const TRectype& rec)
|
|
{
|
|
NFCHECK("Operazione 'write' non consentita sul TSortedfile");
|
|
return 0;
|
|
}
|
|
|
|
// @mfunc Riscrive un record
|
|
int TSortedfile::rewrite()
|
|
{
|
|
rewrite(curr());
|
|
return 0;
|
|
}
|
|
// @mfunc Riscrive un record (il record <p rec>)
|
|
int TSortedfile::rewrite(const TRectype& rec)
|
|
{
|
|
NFCHECK("Operazione 'rewrite' non consentita sul TSortedfile");
|
|
return 0;
|
|
}
|
|
|
|
// @mfunc Riscrive un record alla posizione <p nrec> copiando da <p rec>
|
|
int TSortedfile::rewriteat(TRecnotype nrec)
|
|
{
|
|
return rewriteat(curr(),nrec);
|
|
}
|
|
// @mfunc Riscrive un record alla posizione <p nrec> copiando da <p rec>
|
|
int TSortedfile::rewriteat(const TRectype& rec, TRecnotype nrec)
|
|
{
|
|
NFCHECK("Operazione 'rewriteat' non consentita sul TSortedfile");
|
|
return 0;
|
|
}
|
|
|
|
// @mfunc Elimina il record
|
|
int TSortedfile::remove()
|
|
{
|
|
return remove(curr());
|
|
}
|
|
// @mfunc Elimina il record copiando da <p rec>
|
|
int TSortedfile::remove(const TRectype& rec)
|
|
{
|
|
NFCHECK("Operazione 'remove' non consentita sul TSortedfile");
|
|
return 0;
|
|
}
|
|
|
|
// @mfunc Attiva la chiave <p nkey> sul file aperto
|
|
void TSortedfile::setkey(int nkey)
|
|
{
|
|
_curs->setkey(nkey);
|
|
}
|
|
// @mfunc Resetta la regione del file (chiama <p TCursor::setregion>
|
|
void TSortedfile::setregion(const TRectype &f, const TRectype &t, int tilde)
|
|
{
|
|
_curs->setregion(f, t, tilde);
|
|
}
|
|
|
|
// @mfunc
|
|
TRecnotype TSortedfile::eod() const
|
|
{
|
|
return _curs->items();
|
|
}
|
|
// @mfunc
|
|
bool TSortedfile::empty()
|
|
{
|
|
return _curs->items()==0;
|
|
}
|
|
|
|
TRectype& TSortedfile::curr() const
|
|
{
|
|
return _curs->curr();
|
|
}
|
|
|
|
void TSortedfile::set_curr(TRectype* curr)
|
|
{
|
|
_curs->file().set_curr(curr);
|
|
}
|
|
|
|
// @mfunc Costruttore.
|
|
TSortedfile::TSortedfile(int logicnum, TRelation* rel, const char* ordexpr, const char* filter, int nkey)
|
|
: TLocalisamfile(logicnum), _rel(NULL)
|
|
{
|
|
// costruisce il cursore
|
|
if (!rel)
|
|
_rel = new TRelation(logicnum);
|
|
else
|
|
_rel = rel;
|
|
_curs = new TSorted_cursor(_rel, ordexpr, "", nkey);
|
|
|
|
if (&curr()!=&(_curs->file().curr()))
|
|
_curs->file().set_curr(&curr());
|
|
|
|
_curs->setfilter(filter,TRUE); //must pass TRUE because cursors doesn't update rel (BUG).
|
|
// DON't move this line BEFORE set_curr : filter's fieldrefs are allocated at cursor setfilter
|
|
}
|
|
|
|
// @mfunc Distruttore
|
|
TSortedfile::~TSortedfile()
|
|
{
|
|
delete _curs;
|
|
if (_rel)
|
|
delete _rel;
|
|
}
|
|
|
|
//
|
|
// *** EOF relation.cpp
|
|
|