aboutsummaryrefslogtreecommitdiff
path: root/libgo/go/utf8/utf8.go
diff options
context:
space:
mode:
Diffstat (limited to 'libgo/go/utf8/utf8.go')
-rw-r--r--libgo/go/utf8/utf8.go120
1 files changed, 60 insertions, 60 deletions
diff --git a/libgo/go/utf8/utf8.go b/libgo/go/utf8/utf8.go
index f542358..8910e17d 100644
--- a/libgo/go/utf8/utf8.go
+++ b/libgo/go/utf8/utf8.go
@@ -16,22 +16,22 @@ const (
)
const (
- _T1 = 0x00 // 0000 0000
- _Tx = 0x80 // 1000 0000
- _T2 = 0xC0 // 1100 0000
- _T3 = 0xE0 // 1110 0000
- _T4 = 0xF0 // 1111 0000
- _T5 = 0xF8 // 1111 1000
-
- _Maskx = 0x3F // 0011 1111
- _Mask2 = 0x1F // 0001 1111
- _Mask3 = 0x0F // 0000 1111
- _Mask4 = 0x07 // 0000 0111
-
- _Rune1Max = 1<<7 - 1
- _Rune2Max = 1<<11 - 1
- _Rune3Max = 1<<16 - 1
- _Rune4Max = 1<<21 - 1
+ t1 = 0x00 // 0000 0000
+ tx = 0x80 // 1000 0000
+ t2 = 0xC0 // 1100 0000
+ t3 = 0xE0 // 1110 0000
+ t4 = 0xF0 // 1111 0000
+ t5 = 0xF8 // 1111 1000
+
+ maskx = 0x3F // 0011 1111
+ mask2 = 0x1F // 0001 1111
+ mask3 = 0x0F // 0000 1111
+ mask4 = 0x07 // 0000 0111
+
+ rune1Max = 1<<7 - 1
+ rune2Max = 1<<11 - 1
+ rune3Max = 1<<16 - 1
+ rune4Max = 1<<21 - 1
)
func decodeRuneInternal(p []byte) (rune, size int, short bool) {
@@ -42,12 +42,12 @@ func decodeRuneInternal(p []byte) (rune, size int, short bool) {
c0 := p[0]
// 1-byte, 7-bit sequence?
- if c0 < _Tx {
+ if c0 < tx {
return int(c0), 1, false
}
// unexpected continuation byte?
- if c0 < _T2 {
+ if c0 < t2 {
return RuneError, 1, false
}
@@ -56,14 +56,14 @@ func decodeRuneInternal(p []byte) (rune, size int, short bool) {
return RuneError, 1, true
}
c1 := p[1]
- if c1 < _Tx || _T2 <= c1 {
+ if c1 < tx || t2 <= c1 {
return RuneError, 1, false
}
// 2-byte, 11-bit sequence?
- if c0 < _T3 {
- rune = int(c0&_Mask2)<<6 | int(c1&_Maskx)
- if rune <= _Rune1Max {
+ if c0 < t3 {
+ rune = int(c0&mask2)<<6 | int(c1&maskx)
+ if rune <= rune1Max {
return RuneError, 1, false
}
return rune, 2, false
@@ -74,14 +74,14 @@ func decodeRuneInternal(p []byte) (rune, size int, short bool) {
return RuneError, 1, true
}
c2 := p[2]
- if c2 < _Tx || _T2 <= c2 {
+ if c2 < tx || t2 <= c2 {
return RuneError, 1, false
}
// 3-byte, 16-bit sequence?
- if c0 < _T4 {
- rune = int(c0&_Mask3)<<12 | int(c1&_Maskx)<<6 | int(c2&_Maskx)
- if rune <= _Rune2Max {
+ if c0 < t4 {
+ rune = int(c0&mask3)<<12 | int(c1&maskx)<<6 | int(c2&maskx)
+ if rune <= rune2Max {
return RuneError, 1, false
}
return rune, 3, false
@@ -92,14 +92,14 @@ func decodeRuneInternal(p []byte) (rune, size int, short bool) {
return RuneError, 1, true
}
c3 := p[3]
- if c3 < _Tx || _T2 <= c3 {
+ if c3 < tx || t2 <= c3 {
return RuneError, 1, false
}
// 4-byte, 21-bit sequence?
- if c0 < _T5 {
- rune = int(c0&_Mask4)<<18 | int(c1&_Maskx)<<12 | int(c2&_Maskx)<<6 | int(c3&_Maskx)
- if rune <= _Rune3Max {
+ if c0 < t5 {
+ rune = int(c0&mask4)<<18 | int(c1&maskx)<<12 | int(c2&maskx)<<6 | int(c3&maskx)
+ if rune <= rune3Max {
return RuneError, 1, false
}
return rune, 4, false
@@ -117,12 +117,12 @@ func decodeRuneInStringInternal(s string) (rune, size int, short bool) {
c0 := s[0]
// 1-byte, 7-bit sequence?
- if c0 < _Tx {
+ if c0 < tx {
return int(c0), 1, false
}
// unexpected continuation byte?
- if c0 < _T2 {
+ if c0 < t2 {
return RuneError, 1, false
}
@@ -131,14 +131,14 @@ func decodeRuneInStringInternal(s string) (rune, size int, short bool) {
return RuneError, 1, true
}
c1 := s[1]
- if c1 < _Tx || _T2 <= c1 {
+ if c1 < tx || t2 <= c1 {
return RuneError, 1, false
}
// 2-byte, 11-bit sequence?
- if c0 < _T3 {
- rune = int(c0&_Mask2)<<6 | int(c1&_Maskx)
- if rune <= _Rune1Max {
+ if c0 < t3 {
+ rune = int(c0&mask2)<<6 | int(c1&maskx)
+ if rune <= rune1Max {
return RuneError, 1, false
}
return rune, 2, false
@@ -149,14 +149,14 @@ func decodeRuneInStringInternal(s string) (rune, size int, short bool) {
return RuneError, 1, true
}
c2 := s[2]
- if c2 < _Tx || _T2 <= c2 {
+ if c2 < tx || t2 <= c2 {
return RuneError, 1, false
}
// 3-byte, 16-bit sequence?
- if c0 < _T4 {
- rune = int(c0&_Mask3)<<12 | int(c1&_Maskx)<<6 | int(c2&_Maskx)
- if rune <= _Rune2Max {
+ if c0 < t4 {
+ rune = int(c0&mask3)<<12 | int(c1&maskx)<<6 | int(c2&maskx)
+ if rune <= rune2Max {
return RuneError, 1, false
}
return rune, 3, false
@@ -167,14 +167,14 @@ func decodeRuneInStringInternal(s string) (rune, size int, short bool) {
return RuneError, 1, true
}
c3 := s[3]
- if c3 < _Tx || _T2 <= c3 {
+ if c3 < tx || t2 <= c3 {
return RuneError, 1, false
}
// 4-byte, 21-bit sequence?
- if c0 < _T5 {
- rune = int(c0&_Mask4)<<18 | int(c1&_Maskx)<<12 | int(c2&_Maskx)<<6 | int(c3&_Maskx)
- if rune <= _Rune3Max {
+ if c0 < t5 {
+ rune = int(c0&mask4)<<18 | int(c1&maskx)<<12 | int(c2&maskx)<<6 | int(c3&maskx)
+ if rune <= rune3Max {
return RuneError, 1, false
}
return rune, 4, false
@@ -279,13 +279,13 @@ func DecodeLastRuneInString(s string) (rune, size int) {
// RuneLen returns the number of bytes required to encode the rune.
func RuneLen(rune int) int {
switch {
- case rune <= _Rune1Max:
+ case rune <= rune1Max:
return 1
- case rune <= _Rune2Max:
+ case rune <= rune2Max:
return 2
- case rune <= _Rune3Max:
+ case rune <= rune3Max:
return 3
- case rune <= _Rune4Max:
+ case rune <= rune4Max:
return 4
}
return -1
@@ -297,14 +297,14 @@ func EncodeRune(p []byte, rune int) int {
// Negative values are erroneous. Making it unsigned addresses the problem.
r := uint(rune)
- if r <= _Rune1Max {
+ if r <= rune1Max {
p[0] = byte(r)
return 1
}
- if r <= _Rune2Max {
- p[0] = _T2 | byte(r>>6)
- p[1] = _Tx | byte(r)&_Maskx
+ if r <= rune2Max {
+ p[0] = t2 | byte(r>>6)
+ p[1] = tx | byte(r)&maskx
return 2
}
@@ -312,17 +312,17 @@ func EncodeRune(p []byte, rune int) int {
r = RuneError
}
- if r <= _Rune3Max {
- p[0] = _T3 | byte(r>>12)
- p[1] = _Tx | byte(r>>6)&_Maskx
- p[2] = _Tx | byte(r)&_Maskx
+ if r <= rune3Max {
+ p[0] = t3 | byte(r>>12)
+ p[1] = tx | byte(r>>6)&maskx
+ p[2] = tx | byte(r)&maskx
return 3
}
- p[0] = _T4 | byte(r>>18)
- p[1] = _Tx | byte(r>>12)&_Maskx
- p[2] = _Tx | byte(r>>6)&_Maskx
- p[3] = _Tx | byte(r)&_Maskx
+ p[0] = t4 | byte(r>>18)
+ p[1] = tx | byte(r>>12)&maskx
+ p[2] = tx | byte(r>>6)&maskx
+ p[3] = tx | byte(r)&maskx
return 4
}
generated by cgit v1.1 at 2025-04-15 00:56:45 +0000