dcrd/txscript/log.go
2019-03-18 11:16:35 -05:00

43 lines
1.1 KiB
Go

// Copyright (c) 2013-2015 The btcsuite developers
// Copyright (c) 2015-2019 The Decred developers
// Use of this source code is governed by an ISC
// license that can be found in the LICENSE file.
package txscript
import (
"github.com/decred/slog"
)
// log is a logger that is initialized with no output filters. This
// means the package will not perform any logging by default until the caller
// requests it.
// The default amount of logging is none.
var log = slog.Disabled
// DisableLog disables all library log output. Logging output is disabled
// by default until UseLogger is called.
//
// Deprecated: Use UseLogger(slog.Disabled) instead.
func DisableLog() {
log = slog.Disabled
}
// UseLogger uses a specified Logger to output package logging info.
func UseLogger(logger slog.Logger) {
log = logger
}
// LogClosure is a closure that can be printed with %v to be used to
// generate expensive-to-create data for a detailed log level and avoid doing
// the work if the data isn't printed.
type logClosure func() string
func (c logClosure) String() string {
return c()
}
func newLogClosure(c func() string) logClosure {
return logClosure(c)
}