return f.firstBoundary(inputString(s), len(s))
}

// NextBoundary reports the index of the boundary between the first and next
// segment in b or -1 if atEOF is false and there are not enough bytes to
// determine this boundary.
func (f Form) NextBoundary(b []byte, atEOF bool) int {
	return f.nextBoundary(inputBytes(b), len(b), atEOF)
}