GoToSocial/vendor/github.com/tdewolff/parse/v2/css/hash.go

76 lines
1.8 KiB
Go

package css
// generated by hasher -type=Hash -file=hash.go; DO NOT EDIT, except for adding more constants to the list and rerun go generate
// uses github.com/tdewolff/hasher
//go:generate hasher -type=Hash -file=hash.go
// Hash defines perfect hashes for a predefined list of strings
type Hash uint32
// Unique hash definitions to be used instead of strings
const (
Document Hash = 0x8 // document
Font_Face Hash = 0x809 // font-face
Keyframes Hash = 0x1109 // keyframes
Media Hash = 0x2105 // media
Page Hash = 0x2604 // page
Supports Hash = 0x1908 // supports
)
// String returns the hash' name.
func (i Hash) String() string {
start := uint32(i >> 8)
n := uint32(i & 0xff)
if start+n > uint32(len(_Hash_text)) {
return ""
}
return _Hash_text[start : start+n]
}
// ToHash returns the hash whose name is s. It returns zero if there is no
// such hash. It is case sensitive.
func ToHash(s []byte) Hash {
if len(s) == 0 || len(s) > _Hash_maxLen {
return 0
}
h := uint32(_Hash_hash0)
for i := 0; i < len(s); i++ {
h ^= uint32(s[i])
h *= 16777619
}
if i := _Hash_table[h&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
t := _Hash_text[i>>8 : i>>8+i&0xff]
for i := 0; i < len(s); i++ {
if t[i] != s[i] {
goto NEXT
}
}
return i
}
NEXT:
if i := _Hash_table[(h>>16)&uint32(len(_Hash_table)-1)]; int(i&0xff) == len(s) {
t := _Hash_text[i>>8 : i>>8+i&0xff]
for i := 0; i < len(s); i++ {
if t[i] != s[i] {
return 0
}
}
return i
}
return 0
}
const _Hash_hash0 = 0x9acb0442
const _Hash_maxLen = 9
const _Hash_text = "documentfont-facekeyframesupportsmediapage"
var _Hash_table = [1 << 3]Hash{
0x1: 0x2604, // page
0x2: 0x2105, // media
0x3: 0x809, // font-face
0x5: 0x1109, // keyframes
0x6: 0x1908, // supports
0x7: 0x8, // document
}