90a8784d3b
Files correlati : Ricompilazione Demo : [ ] Commento : git-svn-id: svn://10.65.10.50/trunk@19539 c028cbd2-c16b-5b4b-a496-9718f37d4682
114 lines
3.2 KiB
C++
Executable File
114 lines
3.2 KiB
C++
Executable File
#ifndef __VARIANT_H
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#define __VARIANT_H
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#ifndef __DATE_H
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#include <date.h>
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#endif
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#ifndef __REAL_H
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#include <real.h>
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#endif
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#ifndef __RECTYPES_H
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#include <rectypes.h>
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#endif
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///////////////////////////////////////////////////////////
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// TVariant
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///////////////////////////////////////////////////////////
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class TVariant : public TSortable
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{
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TFieldtypes _type;
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void* _ptr;
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protected:
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virtual TObject* dup() const { return new TVariant(*this); }
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virtual word class_id() const { return CLASS_VARIANT; }
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virtual bool is_kind_of(word cid) const;
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void copy(const TVariant& var);
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public:
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TFieldtypes type() const { return _type; } // Internal use only
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bool is_string() const { return _type == _alfafld; }
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bool is_bool() const { return _type == _boolfld; }
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bool is_date() const { return _type == _datefld; }
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bool is_real() const { return _type == _realfld; }
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bool is_empty() const;
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bool is_null() const { return _type == _nullfld; }
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bool is_zero() const;
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void set_null();
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void set(const char* str);
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void set(const real& r);
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void set(const long n);
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void set(const int i);
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void set(const TDate& d);
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void set(const bool b);
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TVariant& operator=(const TVariant& var) { copy(var); return *this; }
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TVariant& operator=(const char* str) { set(str); return *this; }
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TVariant& operator=(const TString& str) { set(str); return *this; }
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TVariant& operator=(const real& r) { set(r); return *this; }
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TVariant& operator=(const long n) { set(n); return *this; }
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TVariant& operator=(const int i) { set(i); return *this; }
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TVariant& operator=(const TDate& d) { set(d); return *this; }
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TVariant& operator=(bool b) { set(b); return *this; }
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TVariant& operator+=(const TVariant& var) { return add(var); }
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const TString& as_string() const;
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bool as_string(TString& str) const;
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real as_real() const;
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long as_int() const;
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TDate as_date() const;
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bool as_bool() const;
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unsigned long as_color() const;
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void convert_to(TFieldtypes ft);
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virtual void print_on(ostream& out) const;
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virtual int compare(const TSortable& s) const;
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TVariant& add(const TVariant& var);
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TVariant& sub(const TVariant& var);
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TVariant() : _type(_nullfld), _ptr(NULL) { }
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TVariant(const char* str) : _type(_alfafld), _ptr(new TString(str)) { }
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TVariant(const TString& str) : _type(_alfafld), _ptr(new TString(str)) { }
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TVariant(const real& num) : _type(_realfld), _ptr(new real(num)) { };
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TVariant(const TDate& d) : _type(_datefld), _ptr((void*)d.date2ansi()) { };
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TVariant(long num) : _type(_longfld), _ptr((void*)num) { };
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TVariant(bool ok) : _type(_longfld), _ptr((void*)ok) { };
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TVariant(const TVariant& var) : _type(_nullfld), _ptr(NULL) { copy(var); }
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virtual ~TVariant() { set_null(); }
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};
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extern const TVariant NULL_VARIANT;
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class TVariant_stack : public TObject
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{
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TArray _var;
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int _sp;
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public:
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int items() const { return _sp; }
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bool empty() const { return _sp <= 0; }
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bool drop();
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TVariant& pop();
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TVariant& peek(int depth = 0);
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void roll(int depth);
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void push(const TVariant& var);
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void push(long n);
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void push(const real& n);
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void push(const char* str);
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void push(const TString& str);
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void reset();
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bool overflow() const;
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TVariant_stack() : _sp(0) { }
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};
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#endif
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