encode_ascii_dataarray6_rank3_I2P Function

  function encode_ascii_dataarray6_rank3_I2P(u, v, w, x, y, z) result(code)
  !< Encode (Base64) a dataarray with 6 components of rank 3 (I2P).
  integer(I2P),    intent(in)   :: u(1:,1:,1:) !< U component.
  integer(I2P),    intent(in)   :: v(1:,1:,1:) !< V component.
  integer(I2P),    intent(in)   :: w(1:,1:,1:) !< W component.
  integer(I2P),    intent(in)   :: x(1:,1:,1:) !< X component.
  integer(I2P),    intent(in)   :: y(1:,1:,1:) !< Y component.
  integer(I2P),    intent(in)   :: z(1:,1:,1:) !< Z component.
  character(len=:), allocatable :: code        !< Encoded base64 dataarray.
  integer(I4P)                  :: n1          !< Counter.
  integer(I4P)                  :: n2          !< Counter.
  integer(I4P)                  :: n3          !< Counter.
  integer(I4P)                  :: l           !< Length
  integer(I4P)                  :: sp          !< String pointer
  integer(I4P)                  :: size_n1     !< Dimension 1 size
  integer(I4P)                  :: size_n2     !< Dimension 2 size
  integer(I4P)                  :: size_n3     !< Dimension 3 size

  size_n1 = size(x, dim=1)
  size_n2 = size(x, dim=2)
  size_n3 = size(x, dim=3)
  
  l = DI2P*6 + 5
  sp = 0
  code = repeat(' ',l*size_n1*size_n2*size_n3)
  do n3=1, size_n3
    do n2=1, size_n2
      do n1=1, size_n1
        code(sp+1:sp+l) = str(n=u(n1, n2, n3))//' '//str(n=v(n1, n2, n3))//' '//str(n=w(n1, n2, n3))// &
          str(n=x(n1, n2, n3))//' '//str(n=y(n1, n2, n3))//' '//str(n=z(n1, n2, n3))
        sp = sp + l
      enddo
    enddo
  enddo
  endfunction encode_ascii_dataarray6_rank3_I2P