/
common.go
136 lines (111 loc) · 2.02 KB
/
common.go
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package common
import (
"runtime"
"strings"
"sync"
)
const (
MaxUint = ^uint(0)
MinUint = 0
MaxInt = int(MaxUint >> 1)
MinInt = -MaxInt - 1
)
type MultiValueFlag []string
func (this *MultiValueFlag) String() string {
if this == nil {
return ""
}
return strings.Join(*this, ",")
}
func (this *MultiValueFlag) Set(value string) error {
splits := strings.Split(value, ",")
*this = append(*this, splits...)
return nil
}
type ChannelError struct {
m sync.Mutex
l []error
}
func (c *ChannelError) Add(err error) {
c.m.Lock()
c.l = append(c.l, err)
c.m.Unlock()
}
func (c *ChannelError) Get() error {
c.m.Lock()
defer c.m.Unlock()
if len(c.l) > 0 {
return c.l[0]
} else {
return nil
}
}
func (c *ChannelError) GetAll() []error {
return c.l
}
func (c *ChannelError) Exists() bool {
c.m.Lock()
defer c.m.Unlock()
return len(c.l) > 0
}
// IsWindowsOS reports true if underlying OS is MS Windows
func IsWindowsOS() bool {
return runtime.GOOS == "windows"
}
// IsLinuxOS reports true if underlying OS is Linux
func IsLinuxOS() bool {
return runtime.GOOS == "linux"
}
// IsMacOS reports true if underlying OS is MacOS
func IsMacOS() bool {
return runtime.GOOS == "darwin"
}
// ToBool reports if value indicates "true"
func ToBool(s string) bool {
if len(s) == 0 {
return false
}
s = strings.ToLower(s)
return s == "true" || s == "1" || strings.HasPrefix(s, "t") || strings.HasPrefix(s, "y") || strings.HasPrefix(s, "j")
}
func Eval(b bool, trueFunc interface{}, falseFunc interface{}) interface{} {
if b {
if f, ok := trueFunc.(func() interface{}); ok {
return f()
} else {
return trueFunc
}
} else {
if f, ok := falseFunc.(func() interface{}); ok {
return f()
} else {
return falseFunc
}
}
}
func Min(v ...int) int {
var r int
for i, vi := range v {
if i == 0 {
r = vi
} else {
if vi < r {
r = vi
}
}
}
return r
}
func Max(v ...int) int {
var r int
for i, vi := range v {
if i == 0 {
r = vi
} else {
if vi > r {
r = vi
}
}
}
return r
}