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logx.go
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logx.go
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/*
logx.go
esme使用的日志库
sam
2022-04-25
*/
package logx
import (
"bytes"
"fmt"
"os"
"runtime"
"strings"
"sync"
"time"
)
const (
LogDate = 1 << iota
LogTime
LogMicroSeconds
LogLongFile
LogShortFile
LogUTC
LogModule
LogLevel
StdFlags = LogDate | LogMicroSeconds | LogShortFile | LogLevel
)
const (
test = iota
debug
info
notice
warn
logError
logPanic
fatal
)
var (
levels = []string{
"[T]",
"[D]",
"[I]",
"[N]",
"[W]",
"[E]",
"[P]",
"[F]",
}
)
type Logger struct {
flag int
level int
out Writer
callDepth int
prefix string
Pool *sync.Pool
}
func NewLogger(w Writer, flag, level int) *Logger {
return &Logger{
flag: flag,
level: level,
out: w,
callDepth: 2,
Pool: &sync.Pool{
New: func() interface{} {
return bytes.NewBuffer(nil)
},
},
}
}
func (log *Logger) Info(format string, v ...interface{}) {
if info < log.level {
return
}
log.output(info, fmt.Sprintf(format, v...))
}
func (log *Logger) Debug(format string, v ...interface{}) {
if debug < log.level {
return
}
log.output(debug, fmt.Sprintf(format, v...))
}
func (log *Logger) Notice(format string, v ...interface{}) {
if notice < log.level {
return
}
log.output(notice, fmt.Sprintf(format, v...))
}
func (log *Logger) Error(format string, v ...interface{}) {
if logError < log.level {
return
}
log.output(logError, fmt.Sprintf(format, v...))
}
func (log *Logger) Warn(format string, v ...interface{}) {
if warn < log.level {
return
}
log.output(warn, fmt.Sprintf(format, v...))
}
func (log *Logger) Panic(format string, v ...interface{}) {
if logPanic < log.level {
return
}
s := fmt.Sprintf(format, v...)
log.output(logPanic, s)
panic(s)
}
func (log *Logger) Fatal(format string, v ...interface{}) {
if fatal < log.level {
return
}
log.output(fatal, fmt.Sprintf(format, v...))
os.Exit(-1)
}
/*
get set
*/
func (log *Logger) GetCallDepth() int {
return log.callDepth
}
func (log *Logger) SetCalldepth(depth int) {
log.callDepth = depth
}
func (log *Logger) SetFlags(flag int) {
log.flag = flag
}
func (log *Logger) SetPrefix(prefix string) {
log.prefix = prefix
}
func (log *Logger) SetOutput(w Writer, prefix string) {
log.out = w
log.prefix = prefix
}
/*
private
*/
func (log *Logger) output(level int, msg string) {
var (
now = time.Now()
file string
line int
)
if log.flag&(LogShortFile|LogLongFile) != 0 {
ok := false
_, file, line, ok = runtime.Caller(log.callDepth)
if !ok {
file = "???"
line = 0
}
}
buffer := log.Pool.Get().(*bytes.Buffer)
buffer.Reset()
log.writeHeader(buffer, now, file, line, level)
buffer.WriteString(msg)
if len(msg) > 0 && msg[len(msg)-1] != '\n' {
buffer.WriteByte('\n')
}
log.out.WriteLog(now, level, buffer.Bytes())
log.Pool.Put(buffer)
}
func (log *Logger) writeHeader(buffer *bytes.Buffer, now time.Time, file string, line int, level int) {
// prefix
if log.prefix != "" {
buffer.WriteByte('[')
buffer.WriteString(log.prefix)
buffer.WriteByte(']')
buffer.WriteByte(' ')
}
// datetime
if log.flag&(LogDate|LogTime|LogMicroSeconds) != 0 {
if log.flag&LogDate != 0 {
year, month, day := now.Date()
formatWrite(buffer, year, 4)
buffer.WriteByte('/')
formatWrite(buffer, int(month), 2)
buffer.WriteByte('/')
formatWrite(buffer, day, 2)
buffer.WriteByte(' ')
}
if log.flag&(LogTime|LogMicroSeconds) != 0 {
hour, min, sec := now.Clock()
formatWrite(buffer, hour, 2)
buffer.WriteByte(':')
formatWrite(buffer, min, 2)
buffer.WriteByte(':')
formatWrite(buffer, sec, 2)
if log.flag&LogMicroSeconds != 0 {
buffer.WriteByte('.')
formatWrite(buffer, now.Nanosecond()/1e6, 3)
}
buffer.WriteByte(' ')
}
}
// level
if log.flag&LogLevel != 0 {
buffer.WriteString(levels[level])
buffer.WriteByte(' ')
}
// package
if log.flag&LogModule != 0 {
buffer.WriteByte('[')
buffer.WriteString(moduleOf(file))
buffer.WriteByte(']')
buffer.WriteByte(' ')
}
// filename and line
if log.flag&(LogShortFile|LogLongFile) != 0 {
if log.flag&LogShortFile != 0 {
i := strings.LastIndex(file, "/")
file = file[i+1:]
}
buffer.WriteString(file)
buffer.WriteByte(':')
formatWrite(buffer, line, -1)
buffer.WriteByte(':')
buffer.WriteByte(' ')
}
}
func formatWrite(buffer *bytes.Buffer, i int, wid int) {
var u = uint(i)
if u == 0 && wid <= 1 {
buffer.WriteByte('0')
return
}
var b [32]byte
bp := len(b)
for ; u > 0 || wid > 0; u /= 10 {
bp--
wid--
b[bp] = byte(u%10) + '0'
}
for bp < len(b) {
buffer.WriteByte(b[bp])
bp++
}
}
func moduleOf(file string) string {
pos := strings.LastIndex(file, "/")
if pos != -1 {
pos1 := strings.LastIndex(file[:pos], "/src/")
if pos1 != -1 {
return file[pos1+5 : pos]
}
}
return "UNKNOWN"
}