source: cpp/frams/neuro/impl/neuroimpl-fuzzy-f0.cpp @ 875

// This file is a part of Framsticks SDK.  http://www.framsticks.com/
// Copyright (C) 1999-2015  Maciej Komosinski and Szymon Ulatowski.
// See LICENSE.txt for details.

/// this is a module included into neuroimpl-fuzzy
/// it converts string parameters - fuzzy sets and fuzzy rules - into appropriate variables

#include "neuroimpl-fuzzy-f0.h"
#include <common/nonstd_stl.h> //min,max

//this part concerns fuzzy sets transformation

/** This function converts given string into numbers representing fuzzy sets */
int FuzzyF0String::convertStrToSets(const SString& str, double numbers[], int nrOfSets)
{
        int pos = 0;
        SString t;
        int have = 0;
        int maxnumbers = 4 * nrOfSets; //number of semicolons should be equal 4*nrOfSets

        while (str.getNextToken(pos, t, ';'))
                if (have >= maxnumbers)
                        break;
                else
                        numbers[have++] = atof(t.c_str());

        //check if number of read numbers (separated with semicolon) is equal to declared
        if (have != 4 * nrOfSets)
                return -1; //number of sets found is lower than declared!

        //check corectness of sets - must not be decreasing
        for (int i = 0; i < nrOfSets; i++)
                if ((numbers[4 * i] > numbers[4 * i + 1]) || (numbers[4 * i + 1] > numbers[4 * i + 2]) || (numbers[4 * i + 2] > numbers[4 * i + 3]))
                        return -2; //error

        return 0;
}

//this part concerns fuzzy rules transformation

/** This function counts number of inputs and outputs given in string consisting fuzzy rules.
It counts number of separators:
; between inputs/outputs and fuzzy sets number
: between conditional and decision part of a rule
/ end of rule
*/
int FuzzyF0String::countInputsOutputs(const char* str, int ruldef[], int rulesNr)
{ //ruledef will remember counted number of inputs and outputs for every rule
        const char* t;
        int separators = 0, inouts = 0;

        for (t = str; *t; t++)
        {
                while (isdigit(*t))
                        t++; //only count, does not care about numbers now
                if (!*t)
                        break; //end of the string - get out of 'for' loop
                if ((*t == ';') || (*t == ':') || (*t == '/')) //found sth different than digit - it must be a separator
                {
                        separators++; //one of separators
                        if (*t != ';') // end of [conditional part of] rule
                        {
                                if (inouts >= 2 * rulesNr) //more rules declared in string than declared in rulesNr
                                        return -2;
                                ruldef[inouts] = (separators + 1) / 2; //cause fuzzy sets - for 1 in/out there are 2 semicolons
                                separators = 0;  //begin counting number of in/out from zero
                                inouts++; //next part of rule / or next rule
                        }
                }
                else // illegal character
                        return -1;
        }

        //check, if nr of found rules is equal to declared
        if (inouts == 2 * rulesNr) //each rule has a conditional part (inputs) and decisional part (outputs)
                return 0;
        else
                return -5; // ShowMessage("Inconsistent number of rules!");
}

/** This function converts given string into variable 'rules' that remembers all inputs/outputs and fuzzy set.
The procedure is conduct according to ruledef, calculated earlier.*/
int FuzzyF0String::convertStrToRules(const SString& str, const int ruledef[], int **rules, int setsNr, int rulesNr, int &maxOutputNr)
{
        int pos = 0, j, k, len = str.len();
        int dNr = 0, sNr = 0;
        int inNr, outNr; //number of inputs/outputs and corresponding fuzzy sets
        SString t;
        bool conditional = true; //which part of rule: conditional or decisional

        maxOutputNr = 0; //sets maximum output nr found in rules string

        //check corectness of the string: number semicolon ... separated with colon or slash
        while (pos < len)
        {
                while ((pos < len) && (isdigit(str.charAt(pos)))) pos++;
                if (!(pos < len))
                        break; //end of the string
                if (str.charAt(pos) != ';')
                        if ((str.charAt(pos) == ':') && (conditional))
                        {
                                sNr++; conditional = false;
                        }
                        else if ((str.charAt(pos) == '/') && (!conditional))
                        {
                                dNr++; conditional = true;
                        }
                        else
                                return -4; //error - illegal character
                pos++;
        }
        if ((dNr != sNr) || (dNr != rulesNr))
                return -5; //error - wrong number of rules

        pos = 0;

        for (j = 0; j < rulesNr; j++)
        { //sum of inputs and outputs
                inNr = 2 * ruledef[2 * j];
                outNr = 2 * ruledef[2 * j + 1];
                for (k = 0; k < inNr + outNr; k++)
                {
                        t = ""; //clear previous value
                        //cuts next integer values
                        while ((pos < len) && (isdigit(str.charAt(pos))))
                                t += str.charAt(pos++);
                        pos++;
                        rules[j][k] = atol(t.c_str()); //convert cut out string into number
                        //fuzzy sets - odd index table - are counted from 0,
                        //so if 5 fuzzy sets declared, values acceptable are 0,1,2,3,4
                        if (((k % 2) != 0) && (rules[j][k] >= setsNr))
                                return -1;
                        if ((k >= inNr) && ((k % 2) == 0))
                                maxOutputNr = max(maxOutputNr, rules[j][k]);
                }
        }
        return 0;
}