/*  sreal.h  by K.Tsuru  */
/*******************************
RealSize and SCalcInfo class
********************************/
#ifndef S_REAL_H
#define S_REAL_H
class RealSize : public virtual SNManager {
    enum { EFF_FIG = 0, HIDDEN_FIG, REAL_MAX_SIZE, BIN_DEC_MAX_SIZE};
    uint size[4];
    void Save(){
        size[EFF_FIG] = effFigures;
        size[HIDDEN_FIG] = hidden;
        size[REAL_MAX_SIZE] = maxSize[REAL];
        size[BIN_DEC_MAX_SIZE] = maxSize[BIN_DEC];
    }
    void Restore(){
        effFigures = size[EFF_FIG];
        hidden = size[HIDDEN_FIG];
        maxSize[REAL] = size[REAL_MAX_SIZE];
        maxSize[BIN_DEC] = size[BIN_DEC_MAX_SIZE];
        size[0] = size[1] = size[2] = size[3] = 0;
    }
// cannot use
    RealSize(const RealSize&);
    RealSize& operator=(const RealSize&);
public:
/************************************************************************
If PROPER bit is ON, set an efficient size for memory and FFT.
TEMP_EXTEND bit should be ON when you temporaly extend effective figures.
If PREF_SPEED bit is ON, set SNManager::preferSpeed = ON.
See : SDouble::ProperUpPrec()
*************************************************************************/
    uint SetEffFig(uint eff_fig, int proper = 0);
    RealSize(){ size[0] = size[1] = size[2] = size[3] = 0;  }
    enum { PROPER = 1, TEMP_EXTEND = 2, PREF_SPEED = 4};
    RealSize(uint ef, int p = 0){
        size[0] = size[1] = size[2] = size[3] = 0;
        SetEffFig(ef, p);   // includes Save()
    }
    ~RealSize();            // includes Restore()
};

/************************************************
stucture for infomation of series and iteration
all members are public
*************************************************/
struct SCalcInfo {
    static int   iterationCount;    // number of ireration in Newton method, etc.
    static ulong upToTerm;          // number of summing up terms in series

    int     ItrCounts() const {
        int it = iterationCount;
        iterationCount = 0;         // reset
        return it;
    }
    ulong   UpToTerm()  const {
        ulong ut = upToTerm;
        upToTerm = 0;               // reset
        return ut;
    }
};
#endif // S_REAL_H