File: position.go

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golang-github-biogo-biogo 1.0.4-1
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// Copyright ©2011-2012 The bíogo Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.

package feat

// Convert from 1-based to 0-based indexing
func OneToZero(pos int) int {
	if pos == 0 {
		panic("feat: 1-based index == 0")
	}
	if pos > 0 {
		pos--
	}

	return pos
}

// Convert from 0-based to 1-based indexing
func ZeroToOne(pos int) int {
	if pos >= 0 {
		pos++
	}

	return pos
}