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// Copyright (c) 2012-2016 Eli Janssen
// Use of this source code is governed by an MIT-style
// license that can be found in the LICENSE file.
package mlog
import (
"sort"
"strings"
)
const (
// Bits or'ed together to control what's printed.
// Ltimestamp specifies to log the date+time stamp
Ltimestamp FlagSet = 1 << iota
// Ltai64n specifies to use tia64n timestamps
// overrides Ltimestamp.
Ltai64n
// Llevel specifies to log message level.
Llevel
// Llongfile specifies to log file path and line number: /a/b/c/d.go:23
Llongfile
// Lshortfile specifies to log file name and line number: d.go:23.
// overrides Llongfile.
Lshortfile
// Lsort specifies to sort Map key value pairs in output.
Lsort
// Ldebug specifies to enable debug level logging.
Ldebug
// Lstd is the standard log format if none is specified.
Lstd = Ltimestamp | Llevel | Lsort
)
var flagNames = map[FlagSet]string{
Ltimestamp: "Ltimestamp",
Ltai64n: "Ltai64n",
Llevel: "Llevel",
Llongfile: "Llongfile",
Lshortfile: "Lshortfile",
Lsort: "Lsort",
Ldebug: "Ldebug",
}
// FlagSet defines the output formatting flags (bitfield) type, which define
// certainly fields to appear in the output.
type FlagSet uint64
// Has returns true if the FlagSet argument is in the set of flags (binary &)
func (f *FlagSet) Has(p FlagSet) bool {
return *f&p != 0
}
// GoString fulfills the GoStringer interface, defining the format used for
// the %#v format string.
func (f FlagSet) GoString() string {
s := make([]byte, 0, len(flagNames))
var p uint64
for p = 256; p > 0; p >>= 1 {
if f&FlagSet(p) != 0 {
s = append(s, '1')
} else {
s = append(s, '0')
}
}
return string(s)
}
// String fulfills the Stringer interface, defining the format used for
// the %s format string.
func (f FlagSet) String() string {
flags := make([]string, 0, len(flagNames))
for k, v := range flagNames {
if f&k != 0 {
flags = append(flags, v)
}
}
sort.Strings(flags)
return "FlagSet(" + strings.Join(flags, "|") + ")"
}
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