Merge pull request #43056 from ydb-platform/merge-rightlib-260610-0127HEADmain

1 files changed, 0 insertions, 144 deletions

diff --git a/contrib/go/_std_1.25/src/unicode/utf16/utf16.go b/contrib/go/_std_1.25/src/unicode/utf16/utf16.go
deleted file mode 100644
index 0293bbf639b..00000000000
--- a/contrib/go/_std_1.25/src/unicode/utf16/utf16.go
+++ /dev/null
@@ -1,144 +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 reports whether 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) + surrSelf
-	}
-	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 {
-		return replacementChar, replacementChar
-	}
-	r -= surrSelf
-	return surr1 + (r>>10)&0x3ff, surr2 + r&0x3ff
-}
-
-// RuneLen returns the number of 16-bit words in the UTF-16 encoding of the rune.
-// It returns -1 if the rune is not a valid value to encode in UTF-16.
-func RuneLen(r rune) int {
-	switch {
-	case 0 <= r && r < surr1, surr3 <= r && r < surrSelf:
-		return 1
-	case surrSelf <= r && r <= maxRune:
-		return 2
-	default:
-		return -1
-	}
-}
-
-// 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 RuneLen(v) {
-		case 1: // normal rune
-			a[n] = uint16(v)
-			n++
-		case 2: // needs surrogate sequence
-			r1, r2 := EncodeRune(v)
-			a[n] = uint16(r1)
-			a[n+1] = uint16(r2)
-			n += 2
-		default:
-			a[n] = uint16(replacementChar)
-			n++
-		}
-	}
-	return a[:n]
-}
-
-// AppendRune appends the UTF-16 encoding of the Unicode code point r
-// to the end of p and returns the extended buffer. If the rune is not
-// a valid Unicode code point, it appends the encoding of U+FFFD.
-func AppendRune(a []uint16, r rune) []uint16 {
-	// This function is inlineable for fast handling of ASCII.
-	switch {
-	case 0 <= r && r < surr1, surr3 <= r && r < surrSelf:
-		// normal rune
-		return append(a, uint16(r))
-	case surrSelf <= r && r <= maxRune:
-		// needs surrogate sequence
-		r1, r2 := EncodeRune(r)
-		return append(a, uint16(r1), uint16(r2))
-	}
-	return append(a, replacementChar)
-}
-
-// Decode returns the Unicode code point sequence represented
-// by the UTF-16 encoding s.
-func Decode(s []uint16) []rune {
-	// Preallocate capacity to hold up to 64 runes.
-	// Decode inlines, so the allocation can live on the stack.
-	buf := make([]rune, 0, 64)
-	return decode(s, buf)
-}
-
-// decode appends to buf the Unicode code point sequence represented
-// by the UTF-16 encoding s and return the extended buffer.
-func decode(s []uint16, buf []rune) []rune {
-	for i := 0; i < len(s); i++ {
-		var ar rune
-		switch r := s[i]; {
-		case r < surr1, surr3 <= r:
-			// normal rune
-			ar = rune(r)
-		case surr1 <= r && r < surr2 && i+1 < len(s) &&
-			surr2 <= s[i+1] && s[i+1] < surr3:
-			// valid surrogate sequence
-			ar = DecodeRune(rune(r), rune(s[i+1]))
-			i++
-		default:
-			// invalid surrogate sequence
-			ar = replacementChar
-		}
-		buf = append(buf, ar)
-	}
-	return buf
-}