1 files changed, 0 insertions, 356 deletions
diff --git a/src/pkg/utf8/utf8.go b/src/pkg/utf8/utf8.go
deleted file mode 100644
index f542358d6..000000000
--- a/src/pkg/utf8/utf8.go
+++ /dev/null
@@ -1,356 +0,0 @@
-// Copyright 2009 The Go Authors. All rights reserved.
-// Use of this source code is governed by a BSD-style
-// license that can be found in the LICENSE file.
-
-// Package utf8 implements functions and constants to support text encoded in
-// UTF-8. This package calls a Unicode character a rune for brevity.
-package utf8
-
-import "unicode" // only needed for a couple of constants
-
-// Numbers fundamental to the encoding.
-const (
-	RuneError = unicode.ReplacementChar // the "error" Rune or "replacement character".
-	RuneSelf  = 0x80                    // characters below Runeself are represented as themselves in a single byte.
-	UTFMax    = 4                       // maximum number of bytes of a UTF-8 encoded Unicode character.
-)
-
-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
-)
-
-func decodeRuneInternal(p []byte) (rune, size int, short bool) {
-	n := len(p)
-	if n < 1 {
-		return RuneError, 0, true
-	}
-	c0 := p[0]
-
-	// 1-byte, 7-bit sequence?
-	if c0 < _Tx {
-		return int(c0), 1, false
-	}
-
-	// unexpected continuation byte?
-	if c0 < _T2 {
-		return RuneError, 1, false
-	}
-
-	// need first continuation byte
-	if n < 2 {
-		return RuneError, 1, true
-	}
-	c1 := p[1]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 2, false
-	}
-
-	// need second continuation byte
-	if n < 3 {
-		return RuneError, 1, true
-	}
-	c2 := p[2]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 3, false
-	}
-
-	// need third continuation byte
-	if n < 4 {
-		return RuneError, 1, true
-	}
-	c3 := p[3]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 4, false
-	}
-
-	// error
-	return RuneError, 1, false
-}
-
-func decodeRuneInStringInternal(s string) (rune, size int, short bool) {
-	n := len(s)
-	if n < 1 {
-		return RuneError, 0, true
-	}
-	c0 := s[0]
-
-	// 1-byte, 7-bit sequence?
-	if c0 < _Tx {
-		return int(c0), 1, false
-	}
-
-	// unexpected continuation byte?
-	if c0 < _T2 {
-		return RuneError, 1, false
-	}
-
-	// need first continuation byte
-	if n < 2 {
-		return RuneError, 1, true
-	}
-	c1 := s[1]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 2, false
-	}
-
-	// need second continuation byte
-	if n < 3 {
-		return RuneError, 1, true
-	}
-	c2 := s[2]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 3, false
-	}
-
-	// need third continuation byte
-	if n < 4 {
-		return RuneError, 1, true
-	}
-	c3 := s[3]
-	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 {
-			return RuneError, 1, false
-		}
-		return rune, 4, false
-	}
-
-	// error
-	return RuneError, 1, false
-}
-
-// FullRune reports whether the bytes in p begin with a full UTF-8 encoding of a rune.
-// An invalid encoding is considered a full Rune since it will convert as a width-1 error rune.
-func FullRune(p []byte) bool {
-	_, _, short := decodeRuneInternal(p)
-	return !short
-}
-
-// FullRuneInString is like FullRune but its input is a string.
-func FullRuneInString(s string) bool {
-	_, _, short := decodeRuneInStringInternal(s)
-	return !short
-}
-
-// DecodeRune unpacks the first UTF-8 encoding in p and returns the rune and its width in bytes.
-func DecodeRune(p []byte) (rune, size int) {
-	rune, size, _ = decodeRuneInternal(p)
-	return
-}
-
-// DecodeRuneInString is like DecodeRune but its input is a string.
-func DecodeRuneInString(s string) (rune, size int) {
-	rune, size, _ = decodeRuneInStringInternal(s)
-	return
-}
-
-// DecodeLastRune unpacks the last UTF-8 encoding in p
-// and returns the rune and its width in bytes.
-func DecodeLastRune(p []byte) (rune, size int) {
-	end := len(p)
-	if end == 0 {
-		return RuneError, 0
-	}
-	start := end - 1
-	rune = int(p[start])
-	if rune < RuneSelf {
-		return rune, 1
-	}
-	// guard against O(n^2) behavior when traversing
-	// backwards through strings with long sequences of
-	// invalid UTF-8.
-	lim := end - UTFMax
-	if lim < 0 {
-		lim = 0
-	}
-	for start--; start >= lim; start-- {
-		if RuneStart(p[start]) {
-			break
-		}
-	}
-	if start < 0 {
-		start = 0
-	}
-	rune, size = DecodeRune(p[start:end])
-	if start+size != end {
-		return RuneError, 1
-	}
-	return rune, size
-}
-
-// DecodeLastRuneInString is like DecodeLastRune but its input is a string.
-func DecodeLastRuneInString(s string) (rune, size int) {
-	end := len(s)
-	if end == 0 {
-		return RuneError, 0
-	}
-	start := end - 1
-	rune = int(s[start])
-	if rune < RuneSelf {
-		return rune, 1
-	}
-	// guard against O(n^2) behavior when traversing
-	// backwards through strings with long sequences of
-	// invalid UTF-8.
-	lim := end - UTFMax
-	if lim < 0 {
-		lim = 0
-	}
-	for start--; start >= lim; start-- {
-		if RuneStart(s[start]) {
-			break
-		}
-	}
-	if start < 0 {
-		start = 0
-	}
-	rune, size = DecodeRuneInString(s[start:end])
-	if start+size != end {
-		return RuneError, 1
-	}
-	return rune, size
-}
-
-// RuneLen returns the number of bytes required to encode the rune.
-func RuneLen(rune int) int {
-	switch {
-	case rune <= _Rune1Max:
-		return 1
-	case rune <= _Rune2Max:
-		return 2
-	case rune <= _Rune3Max:
-		return 3
-	case rune <= _Rune4Max:
-		return 4
-	}
-	return -1
-}
-
-// EncodeRune writes into p (which must be large enough) the UTF-8 encoding of the rune.
-// It returns the number of bytes written.
-func EncodeRune(p []byte, rune int) int {
-	// Negative values are erroneous.  Making it unsigned addresses the problem.
-	r := uint(rune)
-
-	if r <= _Rune1Max {
-		p[0] = byte(r)
-		return 1
-	}
-
-	if r <= _Rune2Max {
-		p[0] = _T2 | byte(r>>6)
-		p[1] = _Tx | byte(r)&_Maskx
-		return 2
-	}
-
-	if r > unicode.MaxRune {
-		r = RuneError
-	}
-
-	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
-	return 4
-}
-
-// RuneCount returns the number of runes in p.  Erroneous and short
-// encodings are treated as single runes of width 1 byte.
-func RuneCount(p []byte) int {
-	i := 0
-	var n int
-	for n = 0; i < len(p); n++ {
-		if p[i] < RuneSelf {
-			i++
-		} else {
-			_, size := DecodeRune(p[i:])
-			i += size
-		}
-	}
-	return n
-}
-
-// RuneCountInString is like RuneCount but its input is a string.
-func RuneCountInString(s string) (n int) {
-	for _ = range s {
-		n++
-	}
-	return
-}
-
-// RuneStart reports whether the byte could be the first byte of
-// an encoded rune.  Second and subsequent bytes always have the top
-// two bits set to 10.
-func RuneStart(b byte) bool { return b&0xC0 != 0x80 }