package log

import (
	"fmt"
	"runtime"
)

func caller(depth int) string {
	_, file, line, _ := runtime.Caller(depth)
	short := file
	for i := len(file) - 1; i > 0; i-- {
		if file[i] == '/' {
			short = file[i+1:]
			break
		}
	}
	return fmt.Sprintf("%s:%d", short, line)
}

func stack() string {
	buf := make([]byte, 1024)
	for {
		n := runtime.Stack(buf, false)
		if n < len(buf) {
			return string(buf[:n])
		}
		buf = make([]byte, 2*len(buf))
	}
}