// Copyright (c) 2013 ActiveState Software Inc. All rights reserved.

package tail

// partitionString partitions the string into chunks of given size,
// with the last chunk of variable size.
func partitionString(s string, chunkSize int) []string {
	if chunkSize <= 0 {
		panic("invalid chunkSize")
	}
	length := len(s)
	chunks := 1 + length/chunkSize
	start := 0
	end := chunkSize
	parts := make([]string, 0, chunks)
	for {
		if end > length {
			end = length
		}
		parts = append(parts, s[start:end])
		if end == length {
			break
		}
		start, end = end, end+chunkSize
	}
	return parts
}