util.go

package main

import (
	"fmt"
	"path/filepath"
	"slices"
)

func splitPath(path string) []string {
	subPath := path
	var result []string
	for {
		subPath = filepath.Clean(subPath) // Amongst others, removes trailing slashes (except for the root directory).

		dir, last := filepath.Split(subPath)
		if last == "" {
			if dir != "" { // Root directory.
				result = append(result, dir)
			}
			break
		}
		result = append(result, last)

		if dir == "" { // Nothing to split anymore.
			break
		}
		subPath = dir
	}

	slices.Reverse(result)
	return result
}

func ByteCountSI(b int64) string {
	const unit = 1000
	if b < unit {
		return fmt.Sprintf("%d B", b)
	}
	div, exp := int64(unit), 0
	for n := b / unit; n >= unit; n /= unit {
		div *= unit
		exp++
	}
	return fmt.Sprintf("%.1f %cB",
		float64(b)/float64(div), "kMGTPE"[exp])
}

func ByteCountIEC(b int64) string {
	const unit = 1024
	if b < unit {
		return fmt.Sprintf("%d B", b)
	}
	div, exp := int64(unit), 0
	for n := b / unit; n >= unit; n /= unit {
		div *= unit
		exp++
	}
	return fmt.Sprintf("%.1f %ciB",
		float64(b)/float64(div), "KMGTPE"[exp])
}