Potenziate espressioni e corretto distruttore dell TIndwin.

git-svn-id: svn://10.65.10.50/trunk@3448 c028cbd2-c16b-5b4b-a496-9718f37d4682

include/expr.cpp

@@ -52,81 +52,80 @@ void TVararray::add(const char* name, const TValue& val)
 }
 
 void TVararray::set(const char* name, const real& val)
-  
 {
-  for (int i = 0; i < items(); i++)
+  for (int i = items()-1; i >= 0; i--)
-    if (strcmp(((TVar *) objptr(i))->getname(), name) == 0)
+  {
+    TVar* var = (TVar*)objptr(i);
+    CHECKS(var, "Variabile NULLA ", name);
+    if (strcmp(var->getname(), name) == 0)
     {     
-      TArray::add(new TValue(val), i);
+      *var = val;
-      return;
+      break;
     }
+  }  
 }
 
 
 void TVararray::set(const char* name, const char* val)
-  
 {
-  for (int i = 0; i < items(); i++)
+  for (int i = items()-1; i >= 0; i--)
-    if (strcmp(((TVar *) objptr(i))->getname(), name) == 0)
+  {
+    TVar* var = (TVar*)objptr(i);
+    CHECKS(var, "Variabile NULLA ", name);
+    if (strcmp(var->getname(), name) == 0)
     {
-      TArray::add(new TValue(val), i);
+      *var = val;
-      return;
+      break;
     }
+  }  
 }
 
 
-real __r;
-
 const real& TVararray::getnum(const char* name)
-  
 {
-  int i;
+  for (int i = items()-1; i >= 0; i--)
-
-  for (i = 0; i < items(); i++)
   {
-    if (strcmp(((TVar*) objptr(i))->getname(), name) == 0)
+    const TVar* var = (const TVar*)objptr(i);
-    {
+    CHECKS(var, "Variabile NULLA ", name);
-      __r  = ((TVar*) objptr(i))->number();
+    if (strcmp(var->getname(), name) == 0)
-      return __r;
+      return var->number();
-    }
   }
-  fatal_box("Unknown variable : %s", name);
+  NFCHECK("Unknown variable: %s", name);
-  return __r;
+  return ZERO;
 }
 
 
 const real& TVararray::getnum(int varnum)
-
 {
   if (varnum >= items())
     fatal_box("invalid variable number : %d", varnum);
-  __r  = ((TVar*) objptr(varnum))->number();
+  return ((TVar*)objptr(varnum))->number();
-  return __r;
 }
 
 
 const char* TVararray::getstring(const char* name)
-
 {
-  const char* s = NULL;
+  for (int i = items()-1; i >= 0; i--)
-  int   i;
-
-  for (i = 0; i < items(); i++)
   {
-    if (strcmp(((TVar*) objptr(i))->getname(), name) == 0)
+    const TVar* var = (TVar*)objptr(i);
-      return ((TVar*) objptr(i))->string();
+    if (strcmp(var->getname(), name) == 0)
+      return var->string();
   }
-  fatal_box("Unknown variable : %s", name);
+  NFCHECK("Unknown variable : %s", name);
-  return s;
+  return "";
 }
 
 
 const char* TVararray::getstring(int varnum)
-
 {
-  if (varnum >= items())
+  if (varnum < 0 || varnum >= items())
-    fatal_box("invalid variable number : %d", varnum);
+  {
-  return ((TVar*) objptr(varnum))->string();
+    NFCHECK("Invalid variable number : %d", varnum);
+    return "";
+  }        
+  const TVar* var = (const TVar*)objptr(varnum);
+  CHECKD(var, "Variabile nulla: ", varnum);
+  return var->string();
 }
 
 
@@ -195,12 +194,14 @@ void TExpression::print_on(ostream& out) const
 { out << _original; }
 
 void TExpression::evaluate_user_func(int index, int nparms, TStack & stack, TTypeexp  type) const
-
 {                
   CHECKD(FALSE, "Unknown function ", index);
   for ( int i = nparms ; i > 0; i--)
     stack.pop(); 
-  stack.push(ZERO);
+  if (curtype == _numexpr)  
+    stack.push(ZERO);
+  else
+    stack.push(TString(""));
 }    
 
 TExpression::operator bool()
@@ -215,37 +216,50 @@ TExpression::operator bool()
 void TExpression::setvar(const char* varname, const real& val)
 
 {
-  _dirty |= _var.getnum(varname) != val;
+  if (_var.getnum(varname) != val)
-  _var.set(varname, val);
+  {
+    _var.set(varname, val);
+    _dirty = TRUE;
+  }  
 }
 
 
 void TExpression::setvar(int varnum, const real& val)
 
 {
-  _dirty |= _var.getnum(varnum) != val;
+  if (_var.getnum(varnum) != val)
-  _var.set(varnum, val);
+  {
+    _var.set(varnum, val);
+    _dirty = TRUE;
+  }  
 }
 
 
 void TExpression::setvar(const char* varname, const char* val)
-
 {
-  _dirty |= strcmp(_var.getstring(varname), val) != 0;
+  if (strcmp(_var.getstring(varname), val) != 0)
-  _var.set(varname, val);
+  {
+    _var.set(varname, val);
+    _dirty = TRUE;
+  }  
 }
 
 
 void TExpression::setvar(int varnum, const char* val)
-
 {
-  _dirty |= strcmp(_var.getstring(varnum), val) != 0;
+  if (strcmp(_var.getstring(varnum), val) != 0)
-  _var.set(varnum, val);
+  {
+    _var.set(varnum, val);
+    _dirty = TRUE;
+  }  
 }
 
+bool TExpression::print_error(const char* msg) const
+{
+  return fatal_box("%s", msg);
+}
 
 void TExpression::eval()
-
 {                                   
   TStack        evalstack(50);
   TBit_array    types;
@@ -314,6 +328,11 @@ void TExpression::eval()
       break;
     case _divide:
       o2 = (real&) evalstack.pop();
+      if (o2.is_zero())
+      {
+        print_error("Divisione per zero!");
+        o2 = 1.0;
+      }
       o1 = (real&) evalstack.pop();
       evalstack.push(real(o1 / o2));
       break;

include/expr.h

@@ -397,6 +397,8 @@ class TExpression : public TObject
 protected:
   // @cmember funzione utente da ricalcolare
   virtual bool user_func_dirty() { return _user_func_defined;}
+  // @cmember stampa un messaggio d'errore
+  virtual bool print_error(const char* msg) const;
   // @cmember Valuta (calcola) l'espressione
   void eval();
   // @cmember Converte una stringa in un nome di funzione o _invalid se non esiste

include/progind.cpp

@@ -69,7 +69,8 @@ void TIndwin::set_text(
 
 TIndwin::~TIndwin()
 {     
-  close_modal(); 
+  if (is_open())
+    close_modal(); 
   
   if (_text) delete _text;
   if (_cancel) delete _cancel;