public char readChar()

in metron-platform/metron-parsing/metron-parsers/src/main/java/org/apache/metron/parsers/ise/JavaCharStream.java [275:366]
73 lines of code
16 McCabe index (conditional complexity)

  public char readChar() throws java.io.IOException
  {
    if (inBuf > 0)
    {
      --inBuf;

      if (++bufpos == bufsize)
        bufpos = 0;

      return buffer[bufpos];
    }

    char c;

    if (++bufpos == available)
      AdjustBuffSize();

    if ((buffer[bufpos] = c = ReadByte()) == '\\')
    {
      UpdateLineColumn(c);

      int backSlashCnt = 1;

      for (;;) // Read all the backslashes
      {
        if (++bufpos == available)
          AdjustBuffSize();

        try
        {
          if ((buffer[bufpos] = c = ReadByte()) != '\\')
          {
            UpdateLineColumn(c);
            // found a non-backslash char.
            if ((c == 'u') && ((backSlashCnt & 1) == 1))
            {
              if (--bufpos < 0)
                bufpos = bufsize - 1;

              break;
            }

            backup(backSlashCnt);
            return '\\';
          }
        }
        catch(java.io.IOException e)
        {
	  // We are returning one backslash so we should only backup (count-1)
          if (backSlashCnt > 1)
            backup(backSlashCnt-1);

          return '\\';
        }

        UpdateLineColumn(c);
        backSlashCnt++;
      }

      // Here, we have seen an odd number of backslash's followed by a 'u'
      try
      {
        while ((c = ReadByte()) == 'u')
          ++column;

        buffer[bufpos] = c = (char)(hexval(c) << 12 |
                                    hexval(ReadByte()) << 8 |
                                    hexval(ReadByte()) << 4 |
                                    hexval(ReadByte()));

        column += 4;
      }
      catch(java.io.IOException e)
      {
        throw new Error("Invalid escape character at line " + line +
                                         " column " + column + ".");
      }

      if (backSlashCnt == 1)
        return c;
      else
      {
        backup(backSlashCnt - 1);
        return '\\';
      }
    }
    else
    {
      UpdateLineColumn(c);
      return c;
    }
  }