protected override bool ValidCheckBitImpl(ReadOnlySpan <char> idNumber, ChinaIdNumberValidationOptions options, List <VerifyFailure> failures, out char rightBit)
{
var mod = ISO7064_1983.MOD11_2(idNumber.SelectAndTakeToInt32Array(17), WeightFactors, 11);
rightBit = CheckBits[mod];
return(rightBit == idNumber[17]);
}
/// <summary>
/// 获取校验码
/// </summary>
/// <param name="code">组织机构代码前八位，注意必须大写字母或数字，如超出8位也只取前8位</param>
/// <returns></returns>
public static char GetCheckBit(string code)
{
if (code == null || !Regex.IsMatch(code, @"^[0-9A-Z]{8,}$"))
{
throw new ArgumentException("Error code.");
}
var mod = (11 - ISO7064_1983.MOD_11_2(code.Select(c => CodeDictionary[c]).Take(8).ToArray(), WeightingFactors, 11)) % 11;
return(CheckBits[mod]);
}
public void MOD_11_2_Error()
{
Assert.Throws <ArgumentException>(() => ISO7064_1983.MOD_11_2(null, null, 10));
Assert.Throws <ArgumentException>(() => ISO7064_1983.MOD_11_2(new int[] { 1, 2 }, null, 10));
Assert.Throws <ArgumentException>(() => ISO7064_1983.MOD_11_2(new int[] { 1, 2 }, new int[] { 1, 2, 3 }, 10));
}
private char GetCheckBit(string code)
{
var mod = (31 - ISO7064_1983.MOD_11_2(code.Select(c => CodeDictionary[c]).Take(17).ToArray(), WeightingFactors, 31)) % 31;
return(CodeDictionary.First(kv => kv.Value == mod).Key);
}
private char GetCheckBit(string idNumber)
{
var mod = ISO7064_1983.MOD_11_2(idNumber.Select(c => (int)c - 48).Take(17).ToArray(), WeightingFactors, 11);
return(CheckBits[mod]);
}
