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https://github.com/bdnugget/eggos.git
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jspc
86eec44700
When running applications on environments where there is no environment, calls to os.Setenv to set a loglevel have inconsistent results. Similarly, setting this environment variable before the first log event, and thus making that call moot, is racy. Instead, then, export log levels, drop the potential stutter in log.LogLvl to log.Level, and allow implementations/ callers of this package to set a log level accordingly, while maintaining the default behaviour
110 lines
1.8 KiB
Go
110 lines
1.8 KiB
Go
package log
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import (
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"bytes"
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"fmt"
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"os"
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"github.com/icexin/eggos/console"
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"github.com/icexin/eggos/drivers/uart"
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"github.com/icexin/eggos/kernel/sys"
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)
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type LogLevel int8
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const (
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LoglvlDebug LogLevel = iota
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LoglvlInfo
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LoglvlWarn
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LoglvlError
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LoglvlNone
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)
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const (
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loglvlEnv = "EGGOS_LOGLVL"
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loglvlEnvDebug = "debug"
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loglvlEnvInfo = "info"
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loglvlEnvWarn = "warn"
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loglvlEnvError = "error"
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loglvlEnvNone = "none"
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defaultLoglvl = LoglvlError
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)
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var (
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Level LogLevel
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ErrInvalidLogLevel = fmt.Errorf("invalid log level")
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)
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func init() {
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lvl := os.Getenv("EGGOS_LOGLVL")
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switch lvl {
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case loglvlEnvDebug:
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Level = LoglvlDebug
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case loglvlEnvInfo:
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Level = LoglvlInfo
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case loglvlEnvWarn:
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Level = LoglvlWarn
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case loglvlEnvError:
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Level = LoglvlError
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default:
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Level = defaultLoglvl
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}
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}
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func SetLevel(l LogLevel) error {
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if l < LoglvlDebug || l > LoglvlNone {
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return ErrInvalidLogLevel
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}
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Level = l
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return nil
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}
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func logf(lvl LogLevel, fmtstr string, args ...interface{}) {
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if lvl < Level {
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return
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}
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buf := bytes.Buffer{}
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fmt.Fprintf(&buf, fmtstr, args...)
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buf.WriteByte('\n')
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buf.WriteTo(console.Console())
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}
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func Debugf(fmtstr string, args ...interface{}) {
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logf(LoglvlDebug, fmtstr, args...)
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}
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func Infof(fmtstr string, args ...interface{}) {
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logf(LoglvlInfo, fmtstr, args...)
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}
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func Warnf(fmtstr string, args ...interface{}) {
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logf(LoglvlWarn, fmtstr, args...)
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}
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func Errorf(fmtstr string, args ...interface{}) {
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logf(LoglvlError, fmtstr, args...)
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}
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//go:nosplit
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func PrintStr(s string) {
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uart.WriteString(s)
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}
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const hextab = "0123456789abcdef"
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//go:nosplit
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func PrintHex(n uintptr) {
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shift := sys.PtrSize*8 - 4
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for ; shift > 0; shift = shift - 4 {
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v := (n >> shift) & 0x0F
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ch := hextab[v]
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uart.WriteByte(ch)
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}
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uart.WriteByte(hextab[n&0x0F])
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}
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