Samuele E. Locatelli
82 lines
2.6 KiB
C#
82 lines
2.6 KiB
C#
using System;
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namespace SteamWare
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{
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/// <summary>
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/// classe con funzioni specifiche di calcolo
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/// </summary>
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public class calcoli
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{
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/// <summary>
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/// inizializzazione classe
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/// </summary>
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protected calcoli()
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{
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}
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/// <summary>
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/// elenco dei caratteri base 36: 0..9A..Z
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/// </summary>
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protected String baseCharList = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
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/// <summary>
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/// converte un intero in un numero a base 36 (0..9A..Z)
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/// </summary>
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/// <param name="num">num intero da convertire</param>
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/// <param name="nBase">base, max 36 (0..9A..Z)</param>
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/// <returns></returns>
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public String ConvertToBase(int num, int nBase)
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{
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// check if we can convert to another base
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if (nBase < 2 || nBase > baseCharList.Length)
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return "";
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int r;
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String newNumber = "";
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// in r we have the offset of the char that was converted to the new base
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while (num >= nBase)
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{
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r = num % nBase;
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newNumber = baseCharList[r] + newNumber;
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num = num / nBase;
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}
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// the last number to convert
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newNumber = baseCharList[num] + newNumber;
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return newNumber;
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}
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/// <summary>
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/// converte da base di dimensione nBase a valore intero
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/// </summary>
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/// <param name="valore">valore in formato nBase</param>
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/// <param name="nBase">base, max 36 (0..9A..Z)</param>
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/// <returns></returns>
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public int ConvertFromBase(string valore, int nBase)
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{
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int answ = 0;
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int moduloPos = 0;
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int valorePos = 0;
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if (nBase < 2 || nBase > baseCharList.Length)
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return answ; // errore di base...
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// percorro il mio vaore string e ri-compongo il numero INT...
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for (int i = 0; i < valore.Length; i++)
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{
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// converto il valore in formato nBase in valore intero da moltiplcare x la base...
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moduloPos = baseCharList.IndexOf(valore[valore.Length - i - 1]);
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valorePos = Convert.ToInt32(Math.Pow(Convert.ToDouble(nBase), Convert.ToDouble(i)));
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// leggo da sx con potenze crescenti della base
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answ = answ + valorePos * moduloPos;
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}
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return answ;
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}
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/// <summary>
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/// metodo di accesso singleton
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/// </summary>
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public static calcoli obj = new calcoli();
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}
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}
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