...

xlog.go

@@ -0,0 +1,83 @@
+// vi:ts=4:sts=4:sw=4:noet:tw=72
+
+package xlog
+
+import (
+	"fmt"
+	"log"
+	"os"
+	"runtime"
+)
+
+const (
+	FATAL = iota
+	ERROR
+	WARNING
+	INFO
+	DEBUG
+)
+
+var levelNames = map[int]string{
+	FATAL:   "[FAT] ",
+	ERROR:   "[ERR] ",
+	WARNING: "[WRN] ",
+	INFO:    "[INF] ",
+	DEBUG:   "[DBG] ",
+}
+
+var logLevel int
+var logger *log.Logger
+
+type LogWriter struct {
+}
+
+func (w *LogWriter) Write(buf []byte) (int, error) {
+	fmt.Printf("%s", string(buf))
+	return len(buf), nil
+}
+
+func Init(lvl int) {
+	logger = log.New(&LogWriter{}, "", log.Ldate|log.Ltime)
+	logLevel = lvl
+}
+
+func Log(lvl int, s string, a ...interface{}) {
+	if lvl <= logLevel {
+		_, file, line, ok := runtime.Caller(2)
+		if !ok {
+			file = "???"
+		} else {
+			short := file
+			for i := len(file) - 1; i > 0; i-- {
+				if file[i] == '/' {
+					short = file[i+1:]
+					break
+				}
+			}
+			file = short
+		}
+		l := fmt.Sprintf("%d", line)
+		logger.Printf(levelNames[lvl]+file+":"+l+": "+s, a...)
+	}
+}
+
+func Debug(s string, a ...interface{}) {
+	Log(DEBUG, s, a...)
+}
+
+func Info(s string, a ...interface{}) {
+	Log(INFO, s, a...)
+}
+
+func Warning(s string, a ...interface{}) {
+	Log(WARNING, s, a...)
+}
+
+func Error(s string, a ...interface{}) {
+	Log(ERROR, s, a...)
+}
+
+func Fatal(s string, a ...interface{}) {
+	Log(FATAL, s, a...)
+	os.Exit(0)
+}