forgejo/vendor/code.gitea.io/git/sha1.go
Tris Forster 85d14cc229 Symlink icons (#1416) (#3826)
* Updated vendor code for code.gitea.io/git

* Display symlinks correctly for files and directories

* Added symlink tests

* Applied silverwinds stylesheet patch

Signed-off-by: Tris Forster <tris.git@shoddynet.org>
2018-05-01 10:04:36 +03:00

76 lines
1.7 KiB
Go

// Copyright 2015 The Gogs 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 git
import (
"bytes"
"encoding/hex"
"fmt"
"strings"
)
// EmptySHA defines empty git SHA
const EmptySHA = "0000000000000000000000000000000000000000"
// SHA1 a git commit name
type SHA1 [20]byte
// Equal returns true if s has the same SHA1 as caller.
// Support 40-length-string, []byte, SHA1.
func (id SHA1) Equal(s2 interface{}) bool {
switch v := s2.(type) {
case string:
if len(v) != 40 {
return false
}
return v == id.String()
case []byte:
return bytes.Equal(v, id[:])
case SHA1:
return v == id
default:
return false
}
}
// String returns string (hex) representation of the Oid.
func (id SHA1) String() string {
return hex.EncodeToString(id[:])
}
// MustID always creates a new SHA1 from a [20]byte array with no validation of input.
func MustID(b []byte) SHA1 {
var id SHA1
copy(id[:], b)
return id
}
// NewID creates a new SHA1 from a [20]byte array.
func NewID(b []byte) (SHA1, error) {
if len(b) != 20 {
return SHA1{}, fmt.Errorf("Length must be 20: %v", b)
}
return MustID(b), nil
}
// MustIDFromString always creates a new sha from a ID with no validation of input.
func MustIDFromString(s string) SHA1 {
b, _ := hex.DecodeString(s)
return MustID(b)
}
// NewIDFromString creates a new SHA1 from a ID string of length 40.
func NewIDFromString(s string) (SHA1, error) {
var id SHA1
s = strings.TrimSpace(s)
if len(s) != 40 {
return id, fmt.Errorf("Length must be 40: %s", s)
}
b, err := hex.DecodeString(s)
if err != nil {
return id, err
}
return NewID(b)
}