/*  sncfile.h  by K.Tsuru  */ 
/************************************************
It provides a method which automatically update
constant files.
*************************************************/
#ifndef SNC_FILE_H
#define SNC_FILE_H

// If you don't use constant files, change this value to 0.
#define UsesSNConstantFile 1

/*************************************************
 Definition of directory for three constant files 
"e.snc", "pi.snc" and "log10.snc".
**************************************************/
#ifndef __unix__
#define SNC_DIR ".\\snconst\\"
#define DIR_DLMT '\\'   // delimiter of directory
#else
#define SNC_DIR "./snconst/"
#define DIR_DLMT '/'
#endif

#define SNC_MAX_PATH    260

// definition of file names
#define E_FILE     "e.snc"      // E()
#define Log10_FILE "log10.snc"  // Log10()
#define Pi_FILE    "pi.snc"     // Pi()
/******************************************************
It searches the directory "SNC_DIR" in the current (./)
or upper (../) directory.
If neither "SNC_DIR" nor "*.snc" file is found, it 
neither create nor update the constant file.
*******************************************************/
bool ExistSncDirectory(char* sncDir);   // set found directory in "sncDir"
bool ExistDirectory(const char* const dir);
bool ExistFile(const char* const fname);
char* LastChar(const char* s);

/*************************************************************
fname = "e.snc", "log10.snc" or "pi.snc"
If there is not the directory "SNC_DIR", it searches "*.snc" 
file in the current directory only.
return NO_SNC_FILE: Neither "SNC_DIR" nor "*.snc" file exists.
return SNC_ENOUGH : The constant file has enough length.
return SNC_UPDATE : The constant file has been updated.
***************************************************************/
enum { NO_SNC_FILE =0, SNC_ENOUGH, SNC_UPDATE };
int UpdateConstantFile(const char* fname,
SDouble (*pfunc)(const SDouble* c, SDouble (*pf)()),
SDouble (*pfCalcFunc)(), uint ef);      // 3701

#endif  //SNC_FILE_H