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package textutil
import "fmt"
// HumanBytes renders n in a short human-friendly form using base-1000 units.
// Examples: 999 -> 999B, 1200 -> 1.2k, 1540000 -> 1.5M
func HumanBytes(n int64) string {
// Handle negative values by processing absolute value and adding sign back
negative := n < 0
if negative {
n = -n
}
if n < 1000 {
result := fmt.Sprintf("%dB", n)
if negative {
return "-" + result
}
return result
}
const unit = 1000.0
v := float64(n)
suffix := []string{"k", "M", "G", "T"}
// Divide first to get into the k range, then loop for higher units
v /= unit
i := 0
for v >= unit && i < len(suffix)-1 {
v /= unit
i++
}
s := fmt.Sprintf("%.1f%s", v, suffix[i])
// Strip trailing ".0" before the suffix (e.g., "1.0k" -> "1k")
// Find the suffix position and check if ".0" precedes it
suffixLen := len(suffix[i])
if len(s) >= suffixLen+3 {
// Check if the portion before the suffix ends with ".0"
beforeSuffix := s[:len(s)-suffixLen]
if len(beforeSuffix) >= 2 && beforeSuffix[len(beforeSuffix)-2:] == ".0" {
s = fmt.Sprintf("%d%s", int(v), suffix[i])
}
}
if negative {
return "-" + s
}
return s
}
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