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596 lines
14 KiB
Go
Vendored
596 lines
14 KiB
Go
Vendored
package log
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import (
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"bytes"
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"fmt"
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"io"
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"os"
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"runtime"
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"strings"
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"sync"
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"time"
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)
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// These flags define which text to prefix to each log entry generated by the Logger.
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const (
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// Bits or'ed together to control what's printed. There is no control over the
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// order they appear (the order listed here) or the format they present (as
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// described in the comments). A colon appears after these items:
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// 2009/0123 01:23:23.123123 /a/b/c/d.go:23: message
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Ldate = 1 << iota // the date: 2009/0123
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Ltime // the time: 01:23:23
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Lmicroseconds // microsecond resolution: 01:23:23.123123. assumes Ltime.
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Llongfile // full file name and line number: /a/b/c/d.go:23
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Lshortfile // final file name element and line number: d.go:23. overrides Llongfile
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Lmodule // module name
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Llevel // level: 0(Debug), 1(Info), 2(Warn), 3(Error), 4(Panic), 5(Fatal)
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Llongcolor // color will start [info] end of line
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Lshortcolor // color only include [info]
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LstdFlags = Ldate | Ltime // initial values for the standard logger
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//Ldefault = Llevel | LstdFlags | Lshortfile | Llongcolor
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) // [prefix][time][level][module][shortfile|longfile]
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func Ldefault() int {
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if runtime.GOOS == "windows" {
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return Llevel | LstdFlags | Lshortfile
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}
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return Llevel | LstdFlags | Lshortfile | Llongcolor
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}
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func Version() string {
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return "0.2.0.1121"
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}
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const (
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Lall = iota
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)
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const (
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Ldebug = iota
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Linfo
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Lwarn
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Lerror
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Lpanic
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Lfatal
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Lnone
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)
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const (
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ForeBlack = iota + 30 //30
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ForeRed //31
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ForeGreen //32
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ForeYellow //33
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ForeBlue //34
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ForePurple //35
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ForeCyan //36
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ForeWhite //37
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)
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const (
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BackBlack = iota + 40 //40
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BackRed //41
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BackGreen //42
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BackYellow //43
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BackBlue //44
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BackPurple //45
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BackCyan //46
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BackWhite //47
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)
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var levels = []string{
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"[Debug]",
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"[Info]",
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"[Warn]",
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"[Error]",
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"[Panic]",
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"[Fatal]",
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}
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// MUST called before all logs
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func SetLevels(lvs []string) {
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levels = lvs
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}
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var colors = []int{
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ForeCyan,
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ForeGreen,
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ForeYellow,
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ForeRed,
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ForePurple,
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ForeBlue,
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}
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// MUST called before all logs
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func SetColors(cls []int) {
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colors = cls
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}
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// A Logger represents an active logging object that generates lines of
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// output to an io.Writer. Each logging operation makes a single call to
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// the Writer's Write method. A Logger can be used simultaneously from
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// multiple goroutines; it guarantees to serialize access to the Writer.
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type Logger struct {
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mu sync.Mutex // ensures atomic writes; protects the following fields
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prefix string // prefix to write at beginning of each line
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flag int // properties
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Level int
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out io.Writer // destination for output
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buf bytes.Buffer // for accumulating text to write
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levelStats [6]int64
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loc *time.Location
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}
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// New creates a new Logger. The out variable sets the
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// destination to which log data will be written.
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// The prefix appears at the beginning of each generated log line.
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// The flag argument defines the logging properties.
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func New(out io.Writer, prefix string, flag int) *Logger {
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l := &Logger{out: out, prefix: prefix, Level: 1, flag: flag, loc: time.Local}
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if out != os.Stdout {
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l.flag = RmColorFlags(l.flag)
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}
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return l
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}
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var Std = New(os.Stderr, "", Ldefault())
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// Cheap integer to fixed-width decimal ASCII. Give a negative width to avoid zero-padding.
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// Knows the buffer has capacity.
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func itoa(buf *bytes.Buffer, i int, wid int) {
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var u uint = uint(i)
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if u == 0 && wid <= 1 {
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buf.WriteByte('0')
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return
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}
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// Assemble decimal in reverse order.
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var b [32]byte
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bp := len(b)
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for ; u > 0 || wid > 0; u /= 10 {
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bp--
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wid--
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b[bp] = byte(u%10) + '0'
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}
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// avoid slicing b to avoid an allocation.
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for bp < len(b) {
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buf.WriteByte(b[bp])
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bp++
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}
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}
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func moduleOf(file string) string {
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pos := strings.LastIndex(file, "/")
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if pos != -1 {
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pos1 := strings.LastIndex(file[:pos], "/src/")
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if pos1 != -1 {
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return file[pos1+5 : pos]
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}
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}
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return "UNKNOWN"
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}
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func (l *Logger) formatHeader(buf *bytes.Buffer, t time.Time,
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file string, line int, lvl int, reqId string) {
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if l.prefix != "" {
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buf.WriteString(l.prefix)
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}
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if l.flag&(Ldate|Ltime|Lmicroseconds) != 0 {
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if l.flag&Ldate != 0 {
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year, month, day := t.Date()
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itoa(buf, year, 4)
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buf.WriteByte('/')
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itoa(buf, int(month), 2)
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buf.WriteByte('/')
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itoa(buf, day, 2)
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buf.WriteByte(' ')
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}
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if l.flag&(Ltime|Lmicroseconds) != 0 {
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hour, min, sec := t.Clock()
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itoa(buf, hour, 2)
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buf.WriteByte(':')
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itoa(buf, min, 2)
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buf.WriteByte(':')
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itoa(buf, sec, 2)
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if l.flag&Lmicroseconds != 0 {
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buf.WriteByte('.')
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itoa(buf, t.Nanosecond()/1e3, 6)
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}
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buf.WriteByte(' ')
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}
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}
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if reqId != "" {
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buf.WriteByte('[')
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buf.WriteString(reqId)
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buf.WriteByte(']')
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buf.WriteByte(' ')
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}
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if l.flag&(Lshortcolor|Llongcolor) != 0 {
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buf.WriteString(fmt.Sprintf("\033[1;%dm", colors[lvl]))
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}
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if l.flag&Llevel != 0 {
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buf.WriteString(levels[lvl])
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buf.WriteByte(' ')
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}
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if l.flag&Lshortcolor != 0 {
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buf.WriteString("\033[0m")
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}
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if l.flag&Lmodule != 0 {
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buf.WriteByte('[')
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buf.WriteString(moduleOf(file))
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buf.WriteByte(']')
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buf.WriteByte(' ')
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}
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if l.flag&(Lshortfile|Llongfile) != 0 {
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if l.flag&Lshortfile != 0 {
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short := file
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for i := len(file) - 1; i > 0; i-- {
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if file[i] == '/' {
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short = file[i+1:]
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break
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}
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}
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file = short
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}
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buf.WriteString(file)
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buf.WriteByte(':')
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itoa(buf, line, -1)
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buf.WriteByte(' ')
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}
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}
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// Output writes the output for a logging event. The string s contains
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// the text to print after the prefix specified by the flags of the
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// Logger. A newline is appended if the last character of s is not
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// already a newline. Calldepth is used to recover the PC and is
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// provided for generality, although at the moment on all pre-defined
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// paths it will be 2.
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func (l *Logger) Output(reqId string, lvl int, calldepth int, s string) error {
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if lvl < l.Level {
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return nil
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}
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now := time.Now().In(l.loc) // get this early.
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var file string
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var line int
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l.mu.Lock()
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defer l.mu.Unlock()
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if l.flag&(Lshortfile|Llongfile|Lmodule) != 0 {
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// release lock while getting caller info - it's expensive.
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l.mu.Unlock()
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var ok bool
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_, file, line, ok = runtime.Caller(calldepth)
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if !ok {
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file = "???"
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line = 0
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}
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l.mu.Lock()
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}
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l.levelStats[lvl]++
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l.buf.Reset()
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l.formatHeader(&l.buf, now, file, line, lvl, reqId)
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l.buf.WriteString(s)
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if l.flag&Llongcolor != 0 {
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l.buf.WriteString("\033[0m")
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}
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if len(s) > 0 && s[len(s)-1] != '\n' {
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l.buf.WriteByte('\n')
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}
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_, err := l.out.Write(l.buf.Bytes())
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return err
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}
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// -----------------------------------------
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// Printf calls l.Output to print to the logger.
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// Arguments are handled in the manner of fmt.Printf.
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func (l *Logger) Printf(format string, v ...interface{}) {
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l.Output("", Linfo, 2, fmt.Sprintf(format, v...))
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}
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// Print calls l.Output to print to the logger.
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// Arguments are handled in the manner of fmt.Print.
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func (l *Logger) Print(v ...interface{}) {
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l.Output("", Linfo, 2, fmt.Sprint(v...))
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}
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// Println calls l.Output to print to the logger.
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// Arguments are handled in the manner of fmt.Println.
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func (l *Logger) Println(v ...interface{}) {
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l.Output("", Linfo, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func (l *Logger) Debugf(format string, v ...interface{}) {
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l.Output("", Ldebug, 2, fmt.Sprintf(format, v...))
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}
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func (l *Logger) Debug(v ...interface{}) {
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l.Output("", Ldebug, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func (l *Logger) Infof(format string, v ...interface{}) {
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l.Output("", Linfo, 2, fmt.Sprintf(format, v...))
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}
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func (l *Logger) Info(v ...interface{}) {
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l.Output("", Linfo, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func (l *Logger) Warnf(format string, v ...interface{}) {
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l.Output("", Lwarn, 2, fmt.Sprintf(format, v...))
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}
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func (l *Logger) Warn(v ...interface{}) {
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l.Output("", Lwarn, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func (l *Logger) Errorf(format string, v ...interface{}) {
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l.Output("", Lerror, 2, fmt.Sprintf(format, v...))
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}
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func (l *Logger) Error(v ...interface{}) {
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l.Output("", Lerror, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func (l *Logger) Fatal(v ...interface{}) {
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l.Output("", Lfatal, 2, fmt.Sprintln(v...))
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os.Exit(1)
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}
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// Fatalf is equivalent to l.Printf() followed by a call to os.Exit(1).
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func (l *Logger) Fatalf(format string, v ...interface{}) {
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l.Output("", Lfatal, 2, fmt.Sprintf(format, v...))
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os.Exit(1)
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}
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// -----------------------------------------
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// Panic is equivalent to l.Print() followed by a call to panic().
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func (l *Logger) Panic(v ...interface{}) {
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s := fmt.Sprintln(v...)
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l.Output("", Lpanic, 2, s)
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panic(s)
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}
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// Panicf is equivalent to l.Printf() followed by a call to panic().
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func (l *Logger) Panicf(format string, v ...interface{}) {
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s := fmt.Sprintf(format, v...)
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l.Output("", Lpanic, 2, s)
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panic(s)
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}
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// -----------------------------------------
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func (l *Logger) Stack(v ...interface{}) {
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s := fmt.Sprint(v...)
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s += "\n"
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buf := make([]byte, 1024*1024)
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n := runtime.Stack(buf, true)
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s += string(buf[:n])
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s += "\n"
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l.Output("", Lerror, 2, s)
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}
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// -----------------------------------------
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func (l *Logger) Stat() (stats []int64) {
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l.mu.Lock()
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v := l.levelStats
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l.mu.Unlock()
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return v[:]
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}
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// Flags returns the output flags for the logger.
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func (l *Logger) Flags() int {
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l.mu.Lock()
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defer l.mu.Unlock()
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return l.flag
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}
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func RmColorFlags(flag int) int {
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// for un std out, it should not show color since almost them don't support
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if flag&Llongcolor != 0 {
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flag = flag ^ Llongcolor
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}
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if flag&Lshortcolor != 0 {
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flag = flag ^ Lshortcolor
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}
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return flag
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}
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func (l *Logger) Location() *time.Location {
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return l.loc
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}
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func (l *Logger) SetLocation(loc *time.Location) {
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l.loc = loc
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}
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// SetFlags sets the output flags for the logger.
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func (l *Logger) SetFlags(flag int) {
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l.mu.Lock()
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defer l.mu.Unlock()
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if l.out != os.Stdout {
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flag = RmColorFlags(flag)
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}
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l.flag = flag
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}
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// Prefix returns the output prefix for the logger.
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func (l *Logger) Prefix() string {
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l.mu.Lock()
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defer l.mu.Unlock()
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return l.prefix
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}
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// SetPrefix sets the output prefix for the logger.
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func (l *Logger) SetPrefix(prefix string) {
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l.mu.Lock()
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defer l.mu.Unlock()
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l.prefix = prefix
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}
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// SetOutputLevel sets the output level for the logger.
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func (l *Logger) SetOutputLevel(lvl int) {
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l.mu.Lock()
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defer l.mu.Unlock()
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l.Level = lvl
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}
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func (l *Logger) OutputLevel() int {
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return l.Level
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}
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func (l *Logger) SetOutput(w io.Writer) {
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l.mu.Lock()
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defer l.mu.Unlock()
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l.out = w
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if w != os.Stdout {
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l.flag = RmColorFlags(l.flag)
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}
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}
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// SetOutput sets the output destination for the standard logger.
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func SetOutput(w io.Writer) {
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Std.SetOutput(w)
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}
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func SetLocation(loc *time.Location) {
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Std.SetLocation(loc)
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}
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func Location() *time.Location {
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return Std.Location()
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}
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// Flags returns the output flags for the standard logger.
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func Flags() int {
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return Std.Flags()
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}
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// SetFlags sets the output flags for the standard logger.
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func SetFlags(flag int) {
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Std.SetFlags(flag)
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}
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// Prefix returns the output prefix for the standard logger.
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func Prefix() string {
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return Std.Prefix()
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}
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// SetPrefix sets the output prefix for the standard logger.
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func SetPrefix(prefix string) {
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Std.SetPrefix(prefix)
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}
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func SetOutputLevel(lvl int) {
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Std.SetOutputLevel(lvl)
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}
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func OutputLevel() int {
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return Std.OutputLevel()
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}
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// -----------------------------------------
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// Print calls Output to print to the standard logger.
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// Arguments are handled in the manner of fmt.Print.
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func Print(v ...interface{}) {
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Std.Output("", Linfo, 2, fmt.Sprintln(v...))
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}
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// Printf calls Output to print to the standard logger.
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// Arguments are handled in the manner of fmt.Printf.
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func Printf(format string, v ...interface{}) {
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Std.Output("", Linfo, 2, fmt.Sprintf(format, v...))
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}
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// Println calls Output to print to the standard logger.
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// Arguments are handled in the manner of fmt.Println.
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func Println(v ...interface{}) {
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Std.Output("", Linfo, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func Debugf(format string, v ...interface{}) {
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Std.Output("", Ldebug, 2, fmt.Sprintf(format, v...))
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}
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func Debug(v ...interface{}) {
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Std.Output("", Ldebug, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func Infof(format string, v ...interface{}) {
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Std.Output("", Linfo, 2, fmt.Sprintf(format, v...))
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}
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func Info(v ...interface{}) {
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Std.Output("", Linfo, 2, fmt.Sprintln(v...))
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}
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// -----------------------------------------
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func Warnf(format string, v ...interface{}) {
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Std.Output("", Lwarn, 2, fmt.Sprintf(format, v...))
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}
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func Warn(v ...interface{}) {
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Std.Output("", Lwarn, 2, fmt.Sprintln(v...))
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}
|
|
|
|
// -----------------------------------------
|
|
|
|
func Errorf(format string, v ...interface{}) {
|
|
Std.Output("", Lerror, 2, fmt.Sprintf(format, v...))
|
|
}
|
|
|
|
func Error(v ...interface{}) {
|
|
Std.Output("", Lerror, 2, fmt.Sprintln(v...))
|
|
}
|
|
|
|
// -----------------------------------------
|
|
|
|
// Fatal is equivalent to Print() followed by a call to os.Exit(1).
|
|
func Fatal(v ...interface{}) {
|
|
Std.Output("", Lfatal, 2, fmt.Sprintln(v...))
|
|
}
|
|
|
|
// Fatalf is equivalent to Printf() followed by a call to os.Exit(1).
|
|
func Fatalf(format string, v ...interface{}) {
|
|
Std.Output("", Lfatal, 2, fmt.Sprintf(format, v...))
|
|
}
|
|
|
|
// -----------------------------------------
|
|
|
|
// Panic is equivalent to Print() followed by a call to panic().
|
|
func Panic(v ...interface{}) {
|
|
Std.Output("", Lpanic, 2, fmt.Sprintln(v...))
|
|
}
|
|
|
|
// Panicf is equivalent to Printf() followed by a call to panic().
|
|
func Panicf(format string, v ...interface{}) {
|
|
Std.Output("", Lpanic, 2, fmt.Sprintf(format, v...))
|
|
}
|
|
|
|
// -----------------------------------------
|
|
|
|
func Stack(v ...interface{}) {
|
|
s := fmt.Sprint(v...)
|
|
s += "\n"
|
|
buf := make([]byte, 1024*1024)
|
|
n := runtime.Stack(buf, true)
|
|
s += string(buf[:n])
|
|
s += "\n"
|
|
Std.Output("", Lerror, 2, s)
|
|
}
|
|
|
|
// -----------------------------------------
|