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package util
// #include <unistd.h>
import "C"
import (
"os"
"time"
"unicode/utf8"
)
// Max returns the largest integer
func Max(first int, items ...int) int {
max := first
for _, item := range items {
if item > max {
max = item
}
}
return max
}
// Min32 returns the smallest 32-bit integer
func Min32(first int32, second int32) int32 {
if first <= second {
return first
}
return second
}
// Max32 returns the largest 32-bit integer
func Max32(first int32, second int32) int32 {
if first > second {
return first
}
return second
}
// Constrain32 limits the given 32-bit integer with the upper and lower bounds
func Constrain32(val int32, min int32, max int32) int32 {
if val < min {
return min
}
if val > max {
return max
}
return val
}
// Constrain limits the given integer with the upper and lower bounds
func Constrain(val int, min int, max int) int {
if val < min {
return min
}
if val > max {
return max
}
return val
}
// DurWithin limits the given time.Duration with the upper and lower bounds
func DurWithin(
val time.Duration, min time.Duration, max time.Duration) time.Duration {
if val < min {
return min
}
if val > max {
return max
}
return val
}
// IsTty returns true is stdin is a terminal
func IsTty() bool {
return int(C.isatty(C.int(os.Stdin.Fd()))) != 0
}
// TrimRight returns rune array with trailing white spaces cut off
func TrimRight(runes []rune) []rune {
var i int
for i = len(runes) - 1; i >= 0; i-- {
char := runes[i]
if char != ' ' && char != '\t' {
break
}
}
return runes[0 : i+1]
}
// BytesToRunes converts byte array into rune array
func BytesToRunes(bytea []byte) []rune {
runes := make([]rune, 0, len(bytea))
for i := 0; i < len(bytea); {
if bytea[i] < utf8.RuneSelf {
runes = append(runes, rune(bytea[i]))
i++
} else {
r, sz := utf8.DecodeRune(bytea[i:])
i += sz
runes = append(runes, r)
}
}
return runes
}
// TrimLen returns the length of trimmed rune array
func TrimLen(runes []rune) int {
var i int
for i = len(runes) - 1; i >= 0; i-- {
char := runes[i]
if char != ' ' && char != '\t' {
break
}
}
// Completely empty
if i < 0 {
return 0
}
var j int
for j = 0; j < len(runes); j++ {
char := runes[j]
if char != ' ' && char != '\t' {
break
}
}
return i - j + 1
}
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