QBlindTools.cc

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#include "QBlindTools.hh"
#include "QDiana.hh"
#include <sstream>
#define Alphabet "qwertyuiopasdfghjklzxcvbnm0123456789"
 
 
QBlindTools::QBlindTools(const std::string& stSeed) 
    : fStringSeed(stSeed)
{
 
    if (fStringSeed.length()<5) {
        QError err = QERR_OUT_OF_RANGE;
        std::stringstream msg;
        msg<<"Your string seed \""<<stSeed<<"\" is shorter than 5 char";
        err.SetDescription(msg.str());
 
        DianaThrow(err);
    }
    std::string::iterator result=fStringSeed.begin();
    std::transform(fStringSeed.begin(),fStringSeed.end(),result,tolower);
    fSeed = Scramble(fStringSeed);
}
 
double QBlindTools::Uniform() const
{
   return Uniform(fSeed);
}
 
 
int QBlindTools::Scramble(const std::string& word) const
{
    const char* StringAlphabet = Alphabet;
    int length= word.length();
    int sum = 0;
    for (int i=0; i<length; i++){
        for (int iAlphabet=0; iAlphabet<26+10; iAlphabet++){
            if ( word[i] == StringAlphabet[iAlphabet] ){
                sum= sum+ iAlphabet ;
            }
        }      
    }
    return sum;
}
 
double QBlindTools::Uniform(const int seed) const
{
    if (seed<1 || seed>8000) {
        QError err = QERR_OUT_OF_RANGE;
        std::stringstream msg;
        msg<<"Your numeric seed \""<<seed<<"\" is out of the 1-8000 range";
        err.SetDescription(msg.str());
 
        DianaThrow(err);
    }
 
    int ia = 8121;
    int ic = 28411;
    int im = 134456;
    unsigned int jRan = (seed*ia + ic) % im;
 
    jRan = (jRan*ia + ic) % im;
    jRan = (jRan*ia + ic) % im;
    jRan = (jRan*ia + ic) % im;
 
    double theRan = (float) jRan / (float) im;     
 
    return theRan;    //theRan is between 0.0 - 1.0
}