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// Copyright 2017 The Gitea Authors. All rights reserved.
// Use of this source code is governed by a MIT-style
// license that can be found in the LICENSE file.
package util
import (
"bytes"
"strings"
)
// OptionalBool a boolean that can be "null"
type OptionalBool byte
const (
// OptionalBoolNone a "null" boolean value
OptionalBoolNone = iota
// OptionalBoolTrue a "true" boolean value
OptionalBoolTrue
// OptionalBoolFalse a "false" boolean value
OptionalBoolFalse
)
// IsTrue return true if equal to OptionalBoolTrue
func (o OptionalBool) IsTrue() bool {
return o == OptionalBoolTrue
}
// IsFalse return true if equal to OptionalBoolFalse
func (o OptionalBool) IsFalse() bool {
return o == OptionalBoolFalse
}
// IsNone return true if equal to OptionalBoolNone
func (o OptionalBool) IsNone() bool {
return o == OptionalBoolNone
}
// OptionalBoolOf get the corresponding OptionalBool of a bool
func OptionalBoolOf(b bool) OptionalBool {
if b {
return OptionalBoolTrue
}
return OptionalBoolFalse
}
// Max max of two ints
func Max(a, b int) int {
if a < b {
return b
}
return a
}
// Min min of two ints
func Min(a, b int) int {
if a > b {
return b
}
return a
}
// IsEmptyString checks if the provided string is empty
func IsEmptyString(s string) bool {
return len(strings.TrimSpace(s)) == 0
}
// NormalizeEOL will convert Windows (CRLF) and Mac (CR) EOLs to UNIX (LF)
func NormalizeEOL(input []byte) []byte {
var right, left, pos int
if right = bytes.IndexByte(input, '\r'); right == -1 {
return input
}
length := len(input)
tmp := make([]byte, length)
// We know that left < length because otherwise right would be -1 from IndexByte.
copy(tmp[pos:pos+right], input[left:left+right])
pos += right
tmp[pos] = '\n'
left += right + 1
pos++
for left < length {
if input[left] == '\n' {
left++
}
right = bytes.IndexByte(input[left:], '\r')
if right == -1 {
copy(tmp[pos:], input[left:])
pos += length - left
break
}
copy(tmp[pos:pos+right], input[left:left+right])
pos += right
tmp[pos] = '\n'
left += right + 1
pos++
}
return tmp[:pos]
}
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