/*  snconst.h  by K.Tsuru  */
/***********************
SN library
Definition for constants
************************/
#ifndef SN_CONST_H
#define SN_CONST_H

#include <limits.h>
#include <cmath>
#include <float.h>

// typedef
#ifndef TYPEDEF_H
#include "typedef.h"
#endif
// Max size of memory block
/*
 maxSizeOfMemoryBlock =1,073,741,824(1GB) maxDigits =2147483648
 Maximum number of digits 4,294,967,296 digits
 INT_MAX= 2,147,483,647
*/
// Uses this value in SXXX class files, block.h and ncblock.h
const unsigned long maxSizeOfMemoryBlock = 1024ul*1024uL*1024uL; // 1,073,741,824(1GB)
//Maximum number of digits = (maxSizeOfMemoryBlock/sizeof(fType))*DFIGURES
const unsigned long maxDigits = maxSizeOfMemoryBlock*2UL; // 2,147,483,648 digits

// type of figure[]  2 bytes
typedef unsigned short fType; // "FType" is changed into "fType" since vesion 2.30

enum { NO = 0, YES = 1 };
// enum { FALSE = 0, TRUE = 1 }; // ver.2.17
enum { OFF = 0, ON = 1 };
enum { DISABLE = 0, ENABLE = 1};

// common constants
const fType fTypeMax = USHRT_MAX;   // maximum value of fType
const fType DRADIX = 10000u;        // decimal radix (= 10^DFIGURES)
const int DFIGURES    = 4;              // figure of DRADIX -1
const int DOUBLE_FIG   = DBL_DIG;       // effective figures of double
const int DOUBLE_BITS  = DBL_MANT_DIG;  // bits of mantissa of double = 53
const double ROUND_DBL_INT = 0.25 +1.0/(1 << 20); //= 0.2500009536... additional value to round double to integer
// used in FFT multiplication etc. Added  "1.0/(1 << 20)" since version 2.30 for BRADIX. See "\test\fftlimit.cpp"

//maximum value of exponent in SDouble class (|rdxExp| <= DRADIX_EXP_MAX)
//condition DRADIX_EXP_MAX < maxDigits must be satisfied Max(SDouble 10^DRADIX_EXP_MAX) < Max(SLong 10^maxDigits)
const int DRADIX_EXP_MAX = INT_MAX - 1;

const ulong DRADIX_SQ = (ulong)DRADIX*(ulong)DRADIX;    // square of DRADIX
extern const double INT_MAX_DBL;// maximum integer in double = 1.0e15

// For SInteger & SDecimal class
// condition 2*BRADIX -1 == fTypeMax must be satisfied
const int BRADIX_BITS = 15;                     // bits of binary radix
const fType BRADIX    = (1u << BRADIX_BITS);    // binary radix
const fType BRADIX1   = BRADIX-1u;
const ulong BRADIX_SQ = (1uL << 2*BRADIX_BITS); // square of BRADIX
const int BFIGURES  = 5;                        // figures of BRADIX in decimal

#define atoF (fType)atoi    // string --> fType
#define fTypeFormat "hu"    // format of fType

// figures which can be displayed on CRT
const unsigned int displayWidth = 80u;

#endif  // SN_CONST_H