func ReadData(r io.Reader, n uint64) ([]byte, error)
ReadData reads n bytes from the input stream, but avoids allocating all n bytes if n is large. This avoids crashing the program by allocating all n bytes in cases where n is incorrect.
The error is io.EOF only if no bytes were read. If an io.EOF happens after reading some but not all the bytes, ReadData returns io.ErrUnexpectedEOF.
func ReadDataAt(r io.ReaderAt, n uint64, off int64) ([]byte, error)
ReadDataAt reads n bytes from the input stream at off, but avoids allocating all n bytes if n is large. This avoids crashing the program by allocating all n bytes in cases where n is incorrect.
func SliceCap[E any](c uint64) int
SliceCap is like SliceCapWithSize but using generics.
func SliceCapWithSize(size, c uint64) int
SliceCapWithSize returns the capacity to use when allocating a slice. After the slice is allocated with the capacity, it should be built using append. This will avoid allocating too much memory if the capacity is large and incorrect.
A negative result means that the value is always too big.