arithmetic types.  A C struct translates to a Go struct, field by
field; unrepresentable fields are replaced with opaque byte arrays.  A
C union translates into a struct containing the first union member and
perhaps additional padding.  C arrays become Go arrays.  C pointers
become Go pointers.  C function pointers become Go's uintptr.
C void pointers become Go's unsafe.Pointer.

For example, mpz_t is defined in <gmp.h> as:

		//	---------- 0/0               0 2017-07-13 19:40 global1
		//	---------- 0/0               0 2017-07-13 19:40 file2
		//	gnutar: Substituting `.' for empty member name
		//	---------- 0/0               0 1969-12-31 16:00
		//	gnutar: Substituting `.' for empty member name
		//	---------- 0/0               0 2014-05-13 09:53
		//
		// According to the PAX specification, this should have been the result:

	}
	numEntries, err := strconv.ParseInt(nextToken(), 10, 0) // Intentionally parse as native int
	if err != nil || numEntries < 0 || int(2*numEntries) < int(numEntries) {
		return nil, ErrHeader
	}

	// Parse for all member entries.
	// numEntries is trusted after this since a potential attacker must have
	// committed resources proportional to what this library used.
	if err := feedTokens(2 * numEntries); err != nil {
		return nil, err
	}