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package util
// #include <unistd.h>
import "C"
import (
"math"
"os"
"os/exec"
"time"
)
// Max returns the largest integer
func Max(first int, second int) int {
if first >= second {
return first
}
return second
}
// Max16 returns the largest integer
func Max16(first int16, second int16) int16 {
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
}
// Min returns the smallest integer
func Min(first int, second int) int {
if first <= second {
return first
}
return second
}
// Min32 returns the smallest 32-bit integer
func Min32(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
}
func AsUint16(val int) uint16 {
if val > math.MaxUint16 {
return math.MaxUint16
} else if val < 0 {
return 0
}
return uint16(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
}
// ExecCommand executes the given command with $SHELL
func ExecCommand(command string) *exec.Cmd {
shell := os.Getenv("SHELL")
if len(shell) == 0 {
shell = "sh"
}
return exec.Command(shell, "-c", command)
}
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