public static string SubstituteVariables()

in src/log4net/Util/OptionConverter.cs [334:379]

43 lines of code
6 McCabe index (conditional complexity)


  public static string SubstituteVariables(string value, System.Collections.IDictionary props)
  {
    value.EnsureNotNull();
    props.EnsureNotNull();
    StringBuilder buf = new();

    int i = 0;
    int j, k;

    while (true)
    {
      j = value.IndexOf(DelimStart, i, StringComparison.Ordinal);
      if (j == -1)
      {
        if (i == 0)
        {
          return value;
        }
        else
        {
          buf.Append(value.Substring(i, value.Length - i));
          return buf.ToString();
        }
      }
      else
      {
        buf.Append(value.Substring(i, j - i));
        k = value.IndexOf(DelimStop, j);
        if (k == -1)
        {
          throw new LogException("[" + value + "] has no closing brace. Opening brace at position [" + j + "]");
        }
        else
        {
          j += DelimStartLen;
          string key = value.Substring(j, k - j);

          if (props[key] is string replacement)
          {
            buf.Append(replacement);
          }
          i = k + DelimStopLen;
        }
      }
    }
  }