Copy the KDE 3.5 branch to branches/trinity for new KDE 3.5 features.

BUG:215923


git-svn-id: svn://anonsvn.kde.org/home/kde/branches/trinity/kdeutils@1054174 283d02a7-25f6-0310-bc7c-ecb5cbfe19da

1 files changed, 181 insertions, 0 deletions

diff --git a/kcalc/kcalc_core.h b/kcalc/kcalc_core.h
new file mode 100644
index 0000000..edd33f3
--- /dev/null
+++ b/kcalc/kcalc_core.h
@@ -0,0 +1,181 @@
+/*
+
+    KCalc, a scientific calculator for the X window system using the
+    Qt widget libraries, available at no cost at http://www.troll.no
+
+    Copyright (C) 1996 Bernd Johannes Wuebben
+                       wuebben@math.cornell.edu
+
+    This program is free software; you can redistribute it and/or modify
+    it under the terms of the GNU General Public License as published by
+    the Free Software Foundation; either version 2 of the License, or
+    (at your option) any later version.
+
+    This program is distributed in the hope that it will be useful,
+    but WITHOUT ANY WARRANTY; without even the implied warranty of
+    MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+    GNU General Public License for more details.
+
+    You should have received a copy of the GNU General Public License
+    along with this program; if not, write to the Free Software
+    Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA  02110-1301, USA.
+
+*/
+
+#ifndef _KCALC_CORE_H
+#define _KCALC_CORE_H
+
+#include "stats.h"
+#include <qvaluestack.h>
+#include "knumber.h"
+
+#define		POS_ZERO	 1e-19L	 /* What we consider zero is */
+#define		NEG_ZERO	-1e-19L	 /* anything between these two */
+
+
+typedef	KNumber	(*Arith)(const KNumber &, const KNumber &);
+typedef	KNumber	(*Prcnt)(const KNumber &, const KNumber &);
+
+#define UNUSED(x) ((void)(x))
+
+
+
+struct operator_data {
+  int precedence;  // priority of operators in " enum Operation"
+  Arith arith_ptr;
+  Prcnt prcnt_ptr;
+};
+
+class CalcEngine
+{
+ public:
+  // operations that can be stored in calculation stack 
+  enum Operation {
+    FUNC_EQUAL,
+    FUNC_PERCENT,
+    FUNC_BRACKET,
+    FUNC_OR,
+    FUNC_XOR,
+    FUNC_AND,
+    FUNC_LSH,
+    FUNC_RSH,
+    FUNC_ADD,
+    FUNC_SUBTRACT,
+    FUNC_MULTIPLY,
+    FUNC_DIVIDE,
+    FUNC_MOD,
+    FUNC_INTDIV,
+    FUNC_POWER,
+    FUNC_PWR_ROOT
+  };
+
+  CalcEngine();
+  
+  KNumber lastOutput(bool &error) const;
+
+  void enterOperation(KNumber num, Operation func);
+
+
+  void ArcCosDeg(KNumber input);
+  void ArcCosRad(KNumber input);
+  void ArcCosGrad(KNumber input);
+  void ArcSinDeg(KNumber input);
+  void ArcSinRad(KNumber input);
+  void ArcSinGrad(KNumber input);
+  void ArcTangensDeg(KNumber input);
+  void ArcTangensRad(KNumber input);
+  void ArcTangensGrad(KNumber input);
+  void AreaCosHyp(KNumber input);
+  void AreaSinHyp(KNumber input);
+  void AreaTangensHyp(KNumber input);
+  void Complement(KNumber input);
+  void CosDeg(KNumber input);
+  void CosRad(KNumber input);
+  void CosGrad(KNumber input);
+  void CosHyp(KNumber input);
+  void Cube(KNumber input);
+  void CubeRoot(KNumber input);
+  void Exp(KNumber input);
+  void Exp10(KNumber input);
+  void Factorial(KNumber input);
+  void InvertSign(KNumber input);
+  void Ln(KNumber input);
+  void Log10(KNumber input);
+  void ParenClose(KNumber input);
+  void ParenOpen(KNumber input);
+  void Reciprocal(KNumber input);
+  void SinDeg(KNumber input);
+  void SinGrad(KNumber input);
+  void SinRad(KNumber input);
+  void SinHyp(KNumber input);
+  void Square(KNumber input);
+  void SquareRoot(KNumber input);
+  void StatClearAll(KNumber input);
+  void StatCount(KNumber input);
+  void StatDataNew(KNumber input);
+  void StatDataDel(KNumber input);
+  void StatMean(KNumber input);
+  void StatMedian(KNumber input);
+  void StatStdDeviation(KNumber input);
+  void StatStdSample(KNumber input);
+  void StatSum(KNumber input);
+  void StatSumSquares(KNumber input);
+  void TangensDeg(KNumber input);
+  void TangensRad(KNumber input);
+  void TangensGrad(KNumber input);
+  void TangensHyp(KNumber input);
+
+  void Reset();
+ private:
+  KStats	stats;
+
+  typedef struct {
+    KNumber number;
+    Operation operation;
+  } _node;
+
+  // Stack holds all operations and numbers that have not yet been
+  // processed, e.g. user types "2+3*", the calculation can not be
+  // executed, because "*" has a higher precedence than "+", so we
+  // need to wait for the next number.
+  //
+  // In the stack this would be stored as ((2,+),(3,*),...)
+  //
+  // "enterOperation": If the introduced Operation has lower priority
+  // than the preceding operations in the stack, then we can start to
+  // evaluate the stack (with "evalStack"). Otherwise we append the new
+  // Operation and number to the stack.
+  //
+  // E.g. "2*3+" evaluates to "6+", but "2+3*" can not be evaluated
+  // yet.
+  //
+  // We also take care of brackets, by writing a marker "FUNC_BRACKET"
+  // into the stack, each time the user opens one.  When a bracket is
+  // closed, everything in the stack is evaluated until the first
+  // marker "FUNC_BRACKET" found.
+  QValueStack<_node> _stack;
+
+  KNumber _last_number;
+
+  bool _percent_mode;
+
+
+  static const struct operator_data Operator[];
+
+  bool evalStack(void);
+
+  KNumber evalOperation(KNumber arg1, Operation operation, KNumber arg2);
+
+  const KNumber Deg2Rad(const KNumber &x) const
+  { return KNumber(2) * KNumber::Pi / KNumber(360) * x; }
+  const KNumber Gra2Rad(const KNumber &x) const
+  { return KNumber(2)*KNumber::Pi / KNumber(400) * x; }
+  const KNumber Rad2Deg(const KNumber &x) const
+  { return KNumber(360) / (KNumber(2) * KNumber::Pi) * x; }
+  const KNumber Rad2Gra(const KNumber &x) const
+  { return KNumber(400) / (KNumber(2)*KNumber::Pi) * x; }
+
+};
+
+
+#endif  //_KCALC_CORE_H