Imported Upstream version 1.4upstream/1.4

1 files changed, 0 insertions, 133 deletions

diff --git a/src/pkg/encoding/binary/varint.go b/src/pkg/encoding/binary/varint.go
deleted file mode 100644
index 3a2dfa3c7..000000000
--- a/src/pkg/encoding/binary/varint.go
+++ /dev/null
@@ -1,133 +0,0 @@
-// Copyright 2011 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 binary
-
-// This file implements "varint" encoding of 64-bit integers.
-// The encoding is:
-// - unsigned integers are serialized 7 bits at a time, starting with the
-//   least significant bits
-// - the most significant bit (msb) in each output byte indicates if there
-//   is a continuation byte (msb = 1)
-// - signed integers are mapped to unsigned integers using "zig-zag"
-//   encoding: Positive values x are written as 2*x + 0, negative values
-//   are written as 2*(^x) + 1; that is, negative numbers are complemented
-//   and whether to complement is encoded in bit 0.
-//
-// Design note:
-// At most 10 bytes are needed for 64-bit values. The encoding could
-// be more dense: a full 64-bit value needs an extra byte just to hold bit 63.
-// Instead, the msb of the previous byte could be used to hold bit 63 since we
-// know there can't be more than 64 bits. This is a trivial improvement and
-// would reduce the maximum encoding length to 9 bytes. However, it breaks the
-// invariant that the msb is always the "continuation bit" and thus makes the
-// format incompatible with a varint encoding for larger numbers (say 128-bit).
-
-import (
-	"errors"
-	"io"
-)
-
-// MaxVarintLenN is the maximum length of a varint-encoded N-bit integer.
-const (
-	MaxVarintLen16 = 3
-	MaxVarintLen32 = 5
-	MaxVarintLen64 = 10
-)
-
-// PutUvarint encodes a uint64 into buf and returns the number of bytes written.
-// If the buffer is too small, PutUvarint will panic.
-func PutUvarint(buf []byte, x uint64) int {
-	i := 0
-	for x >= 0x80 {
-		buf[i] = byte(x) | 0x80
-		x >>= 7
-		i++
-	}
-	buf[i] = byte(x)
-	return i + 1
-}
-
-// Uvarint decodes a uint64 from buf and returns that value and the
-// number of bytes read (> 0). If an error occurred, the value is 0
-// and the number of bytes n is <= 0 meaning:
-//
-//	n == 0: buf too small
-//	n  < 0: value larger than 64 bits (overflow)
-//              and -n is the number of bytes read
-//
-func Uvarint(buf []byte) (uint64, int) {
-	var x uint64
-	var s uint
-	for i, b := range buf {
-		if b < 0x80 {
-			if i > 9 || i == 9 && b > 1 {
-				return 0, -(i + 1) // overflow
-			}
-			return x | uint64(b)<<s, i + 1
-		}
-		x |= uint64(b&0x7f) << s
-		s += 7
-	}
-	return 0, 0
-}
-
-// PutVarint encodes an int64 into buf and returns the number of bytes written.
-// If the buffer is too small, PutVarint will panic.
-func PutVarint(buf []byte, x int64) int {
-	ux := uint64(x) << 1
-	if x < 0 {
-		ux = ^ux
-	}
-	return PutUvarint(buf, ux)
-}
-
-// Varint decodes an int64 from buf and returns that value and the
-// number of bytes read (> 0). If an error occurred, the value is 0
-// and the number of bytes n is <= 0 with the following meaning:
-//
-//	n == 0: buf too small
-//	n  < 0: value larger than 64 bits (overflow)
-//              and -n is the number of bytes read
-//
-func Varint(buf []byte) (int64, int) {
-	ux, n := Uvarint(buf) // ok to continue in presence of error
-	x := int64(ux >> 1)
-	if ux&1 != 0 {
-		x = ^x
-	}
-	return x, n
-}
-
-var overflow = errors.New("binary: varint overflows a 64-bit integer")
-
-// ReadUvarint reads an encoded unsigned integer from r and returns it as a uint64.
-func ReadUvarint(r io.ByteReader) (uint64, error) {
-	var x uint64
-	var s uint
-	for i := 0; ; i++ {
-		b, err := r.ReadByte()
-		if err != nil {
-			return x, err
-		}
-		if b < 0x80 {
-			if i > 9 || i == 9 && b > 1 {
-				return x, overflow
-			}
-			return x | uint64(b)<<s, nil
-		}
-		x |= uint64(b&0x7f) << s
-		s += 7
-	}
-}
-
-// ReadVarint reads an encoded signed integer from r and returns it as an int64.
-func ReadVarint(r io.ByteReader) (int64, error) {
-	ux, err := ReadUvarint(r) // ok to continue in presence of error
-	x := int64(ux >> 1)
-	if ux&1 != 0 {
-		x = ^x
-	}
-	return x, err
-}