You are an expert in writing code in many different languages. Your goal is to perform code completion for the following code, keeping in mind the rest of the code and the file meta data.
    Metadata details:
    filename: debug.go
    path of file: ./repos/gccrs/libgo/go/encoding/gob
    
    the code of the file until where you have to start completion: // 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.

// Delete the next line to include in the gob package.
//go:build ignore

package gob

// This file is not normally included in the gob package. Used only for debugging the package itself.
// Except for reading uints, it is an implementation of a reader that is indepe
    
func (p *peekReader) peek(b []byte) (n int, err error) {
	if len(p.data) > 0 {
		n = copy(b, p.data)
		if n == len(b) {
			return
		}
		b = b[n:]
	}
	if len(b) == 0 {
		return
	}
	m, e := io.ReadFull(p.r, b)
	if m > 0 {
		p.data = append(p.data, b[:m]...)
	}
	n += m
	if e == io.ErrUnexpectedEOF {
		// That means m > 0 but we reached EOF. If we got data
		// we won't complain about not being able to peek enough.
		if n > 0 {
			e = nil
		} else {
			e = io.EOF
		}
	}
	return n, e
}