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A number of the file system specific resize() methods use floating point calculations to convert from the new partition size in sectors to the new file system size to be passed to the resize command in bytes or kibibytes. This is bad because there could be rounding errors converting from integer to floating point, performing the calculation and converting back. Replace with integer only multiply and divide calculations. Integer division always truncates [1] which is exactly what is needed. The largest integer will be the size of the file system in bytes held in a signed 64-bit long long, or Sector or Byte_Value typedef of the same type. This will limit the size that a file system can be shrunk to, to 8 EiB - 1 byte. [1] C++ Arithmetic operators https://en.cppreference.com/w/cpp/language/operator_arithmetic "the algebraic quotient of integer division is truncated towards zero (fractional part is discarded)" Clos...f098ba1e
