1 files changed, 0 insertions, 108 deletions
diff --git a/src/pkg/unicode/utf16/utf16.go b/src/pkg/unicode/utf16/utf16.go
deleted file mode 100644
index c0e47c535..000000000
--- a/src/pkg/unicode/utf16/utf16.go
+++ /dev/null
@@ -1,108 +0,0 @@
-// Copyright 2010 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 utf16 implements encoding and decoding of UTF-16 sequences.
-package utf16
-
-// The conditions replacementChar==unicode.ReplacementChar and
-// maxRune==unicode.MaxRune are verified in the tests.
-// Defining them locally avoids this package depending on package unicode.
-
-const (
-	replacementChar = '\uFFFD'     // Unicode replacement character
-	maxRune         = '\U0010FFFF' // Maximum valid Unicode code point.
-)
-
-const (
-	// 0xd800-0xdc00 encodes the high 10 bits of a pair.
-	// 0xdc00-0xe000 encodes the low 10 bits of a pair.
-	// the value is those 20 bits plus 0x10000.
-	surr1 = 0xd800
-	surr2 = 0xdc00
-	surr3 = 0xe000
-
-	surrSelf = 0x10000
-)
-
-// IsSurrogate returns true if the specified Unicode code point
-// can appear in a surrogate pair.
-func IsSurrogate(r rune) bool {
-	return surr1 <= r && r < surr3
-}
-
-// DecodeRune returns the UTF-16 decoding of a surrogate pair.
-// If the pair is not a valid UTF-16 surrogate pair, DecodeRune returns
-// the Unicode replacement code point U+FFFD.
-func DecodeRune(r1, r2 rune) rune {
-	if surr1 <= r1 && r1 < surr2 && surr2 <= r2 && r2 < surr3 {
-		return (r1-surr1)<<10 | (r2 - surr2) + 0x10000
-	}
-	return replacementChar
-}
-
-// EncodeRune returns the UTF-16 surrogate pair r1, r2 for the given rune.
-// If the rune is not a valid Unicode code point or does not need encoding,
-// EncodeRune returns U+FFFD, U+FFFD.
-func EncodeRune(r rune) (r1, r2 rune) {
-	if r < surrSelf || r > maxRune || IsSurrogate(r) {
-		return replacementChar, replacementChar
-	}
-	r -= surrSelf
-	return surr1 + (r>>10)&0x3ff, surr2 + r&0x3ff
-}
-
-// Encode returns the UTF-16 encoding of the Unicode code point sequence s.
-func Encode(s []rune) []uint16 {
-	n := len(s)
-	for _, v := range s {
-		if v >= surrSelf {
-			n++
-		}
-	}
-
-	a := make([]uint16, n)
-	n = 0
-	for _, v := range s {
-		switch {
-		case v < 0, surr1 <= v && v < surr3, v > maxRune:
-			v = replacementChar
-			fallthrough
-		case v < surrSelf:
-			a[n] = uint16(v)
-			n++
-		default:
-			r1, r2 := EncodeRune(v)
-			a[n] = uint16(r1)
-			a[n+1] = uint16(r2)
-			n += 2
-		}
-	}
-	return a[0:n]
-}
-
-// Decode returns the Unicode code point sequence represented
-// by the UTF-16 encoding s.
-func Decode(s []uint16) []rune {
-	a := make([]rune, len(s))
-	n := 0
-	for i := 0; i < len(s); i++ {
-		switch r := s[i]; {
-		case surr1 <= r && r < surr2 && i+1 < len(s) &&
-			surr2 <= s[i+1] && s[i+1] < surr3:
-			// valid surrogate sequence
-			a[n] = DecodeRune(rune(r), rune(s[i+1]))
-			i++
-			n++
-		case surr1 <= r && r < surr3:
-			// invalid surrogate sequence
-			a[n] = replacementChar
-			n++
-		default:
-			// normal rune
-			a[n] = rune(r)
-			n++
-		}
-	}
-	return a[0:n]
-}