caller2.go

func (l *loggingT) setV(pc uintptr) Level {
 fn := runtime.FuncForPC(pc)
 file, _ := fn.FileLine(pc)
 // The file is something like /a/b/c/d.go. We want just the d.
 if strings.HasSuffix(file, ".go") {
  file = file[:len(file)-3]
 }
 if slash := strings.LastIndex(file, "/"); slash >= 0 {
  file = file[slash+1:]
 }
 for _, filter := range l.vmodule.filter {
  if filter.match(file) {
   l.vmap[pc] = filter.level
   return filter.level
  }
 }
 l.vmap[pc] = 0
 return 0
}