func Pad(n int) int {
	return (n + 3) & ^3
}
Pad a length to align on 4 bytes.
package xgb
import (
	"fmt"
	"strings"
)
func StringsJoin(ss []string, sep string) string {
	return strings.Join(ss, sep)
}
func Sprintf(format string, v ...interface{}) string {
	return fmt.Sprintf(format, v...)
}
func Errorf(format string, v ...interface{}) error {
	return fmt.Errorf(format, v...)
}