b69a849114
This commit contains the entire btcchain repository along with several changes needed to move all of the files into the blockchain directory in order to prepare it for merging. This does NOT update btcd or any of the other packages to use the new location as that will be done separately. - All import paths in the old btcchain test files have been changed to the new location - All references to btcchain as the package name have been changed to blockchain
72 lines
1.8 KiB
Go
72 lines
1.8 KiB
Go
// Copyright (c) 2013-2014 Conformal Systems LLC.
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// Use of this source code is governed by an ISC
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// license that can be found in the LICENSE file.
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package blockchain
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import (
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"errors"
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"io"
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"github.com/btcsuite/btclog"
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)
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// log is a logger that is initialized with no output filters. This
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// means the package will not perform any logging by default until the caller
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// requests it.
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var log btclog.Logger
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// The default amount of logging is none.
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func init() {
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DisableLog()
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}
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// DisableLog disables all library log output. Logging output is disabled
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// by default until either UseLogger or SetLogWriter are called.
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func DisableLog() {
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log = btclog.Disabled
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}
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// UseLogger uses a specified Logger to output package logging info.
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// This should be used in preference to SetLogWriter if the caller is also
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// using btclog.
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func UseLogger(logger btclog.Logger) {
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log = logger
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}
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// SetLogWriter uses a specified io.Writer to output package logging info.
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// This allows a caller to direct package logging output without needing a
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// dependency on seelog. If the caller is also using btclog, UseLogger should
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// be used instead.
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func SetLogWriter(w io.Writer, level string) error {
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if w == nil {
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return errors.New("nil writer")
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}
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lvl, ok := btclog.LogLevelFromString(level)
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if !ok {
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return errors.New("invalid log level")
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}
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l, err := btclog.NewLoggerFromWriter(w, lvl)
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if err != nil {
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return err
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}
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UseLogger(l)
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return nil
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}
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// LogClosure is a closure that can be printed with %v to be used to
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// generate expensive-to-create data for a detailed log level and avoid doing
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// the work if the data isn't printed.
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type logClosure func() string
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func (c logClosure) String() string {
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return c()
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}
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func newLogClosure(c func() string) logClosure {
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return logClosure(c)
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}
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