/// <summary>
/// Calculates the check digit of a number, limiting power operations on powerLimite parameter.
/// </summary>
/// <param name="mode">One of <see cref="CheckDigitAlgorithm"/> values that determines witch algorithm will be used.</param>
/// <param name="number">The desired number to calculate check digit.</param>
/// <param name="digitLength">The size of digits generated.</param>
/// <param name="powerLimit">An integer limit of power operations.</param>
/// <returns>An integer of the check digit.</returns>
/// <remarks>
/// </remarks>
public static int CalculateCheckDigit(CheckDigitAlgorithm mode, long number, int digitLength, int powerLimit)
{
if (number < 0)
{
throw new ArgumentOutOfRangeException("number");
}
if (digitLength < 1 || digitLength > 8)
{
throw new ArgumentOutOfRangeException("digitLength");
}
string result = number.ToString();
long power, amount;
int i, n;
for (n = 1; n <= digitLength; n++)
{
amount = 0;
power = 2;
for (i = result.Length - 1; i >= 0; i--)
{
amount += (power * Convert.ToInt32(result[i].ToString()));
if (++power > powerLimit)
{
power = 2;
}
}
result += (((amount * 10) % 11) % 10).ToString();
}
return(Convert.ToInt32(result.Substring(result.Length - digitLength, digitLength)));
}
/*
*
* / -----------------------------------------------------------------*
| CalculaDigitoMod11(Dado, NumDig, LimMult) |
| Retorna o(s) NumDig Dígitos de Controle Módulo 11 do |
| Dado, limitando o Valor de Multiplicação em LimMult: |
| |
| Números Comuns: NumDig LimMult |
| CNPJ 2 9 |
| CPF 2 12 |
| PIS,C/C,Age 1 9 |
*----------------------------------------------------------------- /
* function CalculaDigitoMod11(Dado, NumDig, LimMult)
* {
* var Mult, Soma, i, n;
*
* for(n=1; n<=NumDig; n++)
* {
* Soma = 0;
* Mult = 2;
* for(i=Dado.length-1; i>=0; i--)
* {
* Soma += (Mult * parseInt(Dado.charAt(i)));
* if(++Mult > LimMult) Mult = 2;
* }
* Dado += ((Soma * 10) % 11) % 10;
* }
* return Dado.substr(Dado.length-NumDig, NumDig);
* }
*/
/// <summary>
/// Calculates the check digit of a number, limiting power operations on powerLimit parameter.
/// </summary>
/// <param name="mode">One of <see cref="CheckDigitAlgorithm"/> values that determines witch algorithm will be used.</param>
/// <param name="number">The desired number to calculate check digit.</param>
/// <returns>An integer of the check digit.</returns>
public static int CalculateCheckDigit(CheckDigitAlgorithm mode, long number)
{
return(CalculateCheckDigit(mode, number, 1, 9));
}