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: meminfo.go
    path of file: ./repos/kubeedge/vendor/github.com/prometheus/procfs
    
    the code of the file until where you have to start completion: // Copyright 2019 The Prometheus Authors
// Licensed under the Apache License, Version 2.0 (the "License");
// you may not use this file except in compliance with the License.
// You may obtain a copy of the License at
//
// http://www.apache.org/licenses/LICENSE-2.0
//
// Unless required by applicable law or agreed to in writing, software
// distributed under the License is distributed on an "AS IS" BASIS,
// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
// See the License for the specific language governing permissions and
// limitations under the License.

package procfs

import (
	"bufio"
	"bytes"
	"fmt"
	"io"
	"strconv"
	"strings"

	"github.com/prometheus/procfs/internal/util"
)

// Meminfo represents memory statistics.
type Meminfo struct {
	// Total usable ram (i.e. physical ram minus a few reserved
	// bits and the kernel binary code)
	MemTotal *uint64
	// The sum of LowFree+HighFree
	MemFree *uint64
	// An estimate of how much memory is available for starting
	// new applications, without swapping. Calculated from
	// MemFree,
    
func parseMemInfo(r io.Reader) (*Meminfo, error) {
	var m Meminfo
	s := bufio.NewScanner(r)
	for s.Scan() {
		// Each line has at least a name and value; we ignore the unit.
		fields := strings.Fields(s.Text())
		if len(fields) < 2 {
			return nil, fmt.Errorf("malformed meminfo line: %q", s.Text())
		}

		v, err := strconv.ParseUint(fields[1], 0, 64)
		if err != nil {
			return nil, err
		}

		switch fields[0] {
		case "MemTotal:":
			m.MemTotal = &v
		case "MemFree:":
			m.MemFree = &v
		case "MemAvailable:":
			m.MemAvailable = &v
		case "Buffers:":
			m.Buffers = &v
		case "Cached:":
			m.Cached = &v
		case "SwapCached:":
			m.SwapCached = &v
		case "Active:":
			m.Active = &v
		case "Inactive:":
			m.Inactive = &v
		case "Active(anon):":
			m.ActiveAnon = &v
		case "Inactive(anon):":
			m.InactiveAnon = &v
		case "Active(file):":
			m.ActiveFile = &v
		case "Inactive(file):":
			m.InactiveFile = &v
		case "Unevictable:":
			m.Unevictable = &v
		case "Mlocked:":
			m.Mlocked = &v
		case "SwapTotal:":
			m.SwapTotal = &v
		case "SwapFree:":
			m.SwapFree = &v
		case "Dirty:":
			m.Dirty = &v
		case "Writeback:":
			m.Writeback = &v
		case "AnonPages:":
			m.AnonPages = &v
		case "Mapped:":
			m.Mapped = &v
		case "Shmem:":
			m.Shmem = &v
		case "Slab:":
			m.Slab = &v
		case "SReclaimable:":
			m.SReclaimable = &v
		case "SUnreclaim:":
			m.SUnreclaim = &v
		case "KernelStack:":
			m.KernelStack = &v
		case "PageTables:":
			m.PageTables = &v
		case "NFS_Unstable:":
			m.NFSUnstable = &v
		case "Bounce:":
			m.Bounce = &v
		case "WritebackTmp:":
			m.WritebackTmp = &v
		case "CommitLimit:":
			m.CommitLimit = &v
		case "Committed_AS:":
			m.CommittedAS = &v
		case "VmallocTotal:":
			m.VmallocTotal = &v
		case "VmallocUsed:":
			m.VmallocUsed = &v
		case "VmallocChunk:":
			m.VmallocChunk = &v
		case "HardwareCorrupted:":
			m.HardwareCorrupted = &v
		case "AnonHugePages:":
			m.AnonHugePages = &v
		case "ShmemHugePages:":
			m.ShmemHugePages = &v
		case "ShmemPmdMapped:":
			m.ShmemPmdMapped = &v
		case "CmaTotal:":
			m.CmaTotal = &v
		case "CmaFree:":
			m.CmaFree = &v
		case "HugePages_Total:":
			m.HugePagesTotal = &v
		case "HugePages_Free:":
			m.HugePagesFree = &v
		case "HugePages_Rsvd:":
			m.HugePagesRsvd = &v
		case "HugePages_Surp:":
			m.HugePagesSurp = &v
		case "Hugepagesize:":
			m.Hugepagesize = &v
		case "DirectMap4k:":
			m.DirectMap4k = &v
		case "DirectMap2M:":
			m.DirectMap2M = &v
		case "DirectMap1G:":
			m.DirectMap1G = &v
		}
	}

	return &m, nil
}