1  // Copyright (c) 2013-2016 The btcsuite developers
 2  // Use of this source code is governed by an ISC
 3  // license that can be found in the LICENSE file.
 4  
 5  package mempool
 6  
 7  import (
 8  	"github.com/btcsuite/btclog"
 9  )
10  
11  // log is a logger that is initialized with no output filters.  This
12  // means the package will not perform any logging by default until the caller
13  // requests it.
14  var log btclog.Logger
15  
16  // The default amount of logging is none.
17  func init() {
18  	DisableLog()
19  }
20  
21  // DisableLog disables all library log output.  Logging output is disabled
22  // by default until either UseLogger or SetLogWriter are called.
23  func DisableLog() {
24  	log = btclog.Disabled
25  }
26  
27  // UseLogger uses a specified Logger to output package logging info.
28  // This should be used in preference to SetLogWriter if the caller is also
29  // using btclog.
30  func UseLogger(logger btclog.Logger) {
31  	log = logger
32  }
33  
34  // pickNoun returns the singular or plural form of a noun depending
35  // on the count n.
36  func pickNoun(n int, singular, plural string) string {
37  	if n == 1 {
38  		return singular
39  	}
40  	return plural
41  }