package common

import (
	"fmt"
)

// FormatBytes 格式化字节大小为人类可读格式
// 例如: 1024 → "1.00 KB", 1048576 → "1.00 MB"
func FormatBytes(bytes uint64) string {
	const unit = 1024
	if bytes < unit {
		return fmt.Sprintf("%d B", bytes)
	}
	div, exp := int64(unit), 0
	for n := bytes / unit; n >= unit; n /= unit {
		div *= unit
		exp++
	}
	return fmt.Sprintf("%.2f %cB", float64(bytes)/float64(div), "KMGTPE"[exp])
}