int getColumn()

in lib/src/file.dart [165:188]

• 21 lines of code
• 7 McCabe index (conditional complexity)

  int getColumn(int offset, {int? line}) {
    if (offset < 0) {
      throw RangeError('Offset may not be negative, was $offset.');
    } else if (offset > length) {
      throw RangeError('Offset $offset must be not be greater than the '
          'number of characters in the file, $length.');
    }

    if (line == null) {
      line = getLine(offset);
    } else if (line < 0) {
      throw RangeError('Line may not be negative, was $line.');
    } else if (line >= lines) {
      throw RangeError('Line $line must be less than the number of '
          'lines in the file, $lines.');
    }

    final lineStart = _lineStarts[line];
    if (lineStart > offset) {
      throw RangeError('Line $line comes after offset $offset.');
    }

    return offset - lineStart;
  }