util.go

package util

import (
	"archive/zip"
	"bytes"
	"crypto/md5"
	"crypto/sha1"
	"encoding/base64"
	"encoding/binary"
	"encoding/csv"
	"encoding/hex"
	"encoding/json"
	"fmt"
	"hash/crc32"
	"html"
	"html/template"
	"io"
	"io/ioutil"
	"log"
	"math"
	"math/rand"
	"net"
	"net/url"
	"os"
	"os/exec"
	"path/filepath"
	"reflect"
	"regexp"
	"runtime"
	"sort"
	"strconv"
	"strings"
	"syscall"
	"time"
	_ "time/tzdata"
	"unicode"
	"unicode/utf8"

	"github.com/google/uuid"
	"github.com/mozillazg/go-pinyin"
	"github.com/pkg/errors"
	"go.mongodb.org/mongo-driver/bson"
	"go.mongodb.org/mongo-driver/mongo"
)

// DateFormat pattern rules.
var datePatterns = []string{
	// year
	"Y", "2006", // A full numeric representation of a year, 4 digits   Examples: 1999 or 2003
	"y", "06", // A two digit representation of a year   Examples: 99 or 03

	// month
	"m", "01", // Numeric representation of a month, with leading zeros 01 through 12
	"n", "1", // Numeric representation of a month, without leading zeros   1 through 12
	"M", "Jan", // A short textual representation of a month, three letters Jan through Dec
	"F", "January", // A full textual representation of a month, such as January or March   January through December

	// day
	"d", "02", // Day of the month, 2 digits with leading zeros 01 to 31
	"j", "2", // Day of the month without leading zeros 1 to 31

	// week
	"D", "Mon", // A textual representation of a day, three letters Mon through Sun
	"l", "Monday", // A full textual representation of the day of the week  Sunday through Saturday

	// time
	"g", "3", // 12-hour format of an hour without leading zeros    1 through 12
	"G", "15", // 24-hour format of an hour without leading zeros   0 through 23
	"h", "03", // 12-hour format of an hour with leading zeros  01 through 12
	"H", "15", // 24-hour format of an hour with leading zeros  00 through 23

	"a", "pm", // Lowercase Ante meridiem and Post meridiem am or pm
	"A", "PM", // Uppercase Ante meridiem and Post meridiem AM or PM

	"i", "04", // Minutes with leading zeros    00 to 59
	"s", "05", // Seconds, with leading zeros   00 through 59

	// time zone
	"T", "MST",
	"P", "-07:00",
	"O", "-0700",

	// RFC 2822
	"r", time.RFC1123Z,
}

var tagPatterns = []string{
	",", "/",
	"，", "/",
	"|", "/",
	"丨", "/",
	"、", "/",
	";", "/",
}

var errNegativeNotAllowed = errors.New("unable to cast negative value")

//timeZone 默认时区
var timeZone *time.Location

//GetTimeZone 获取时区
func GetTimeZone() *time.Location {
	if timeZone == nil {
		timeZone, _ = time.LoadLocation("Local")
	}
	return timeZone
}

//SetTimeZone 设置时区
func SetTimeZone(zone string) *time.Location {
	//loc, err := time.LoadLocation("Asia/Shanghai")
	timeZone, _ = time.LoadLocation(zone)
	return timeZone
}

// DateTime Functions

// Time time()
func Time() int64 {
	//cstZone := time.FixedZone("CST", 8*3600)
	cstZone := GetTimeZone()
	return time.Now().In(cstZone).Unix()
}

// Now time.Now()
func Now() time.Time {
	cstZone := GetTimeZone()
	return time.Now().In(cstZone)
}

//Timestamp 毫秒
func Timestamp() int64 {
	cstZone := GetTimeZone()
	return time.Now().In(cstZone).UnixNano() / int64(time.Millisecond)
}

// StrToTime StrToTime()
// StrToTime("02/01/2006 15:04:05", "02/01/2016 15:04:05") == 1451747045
// StrToTime("3 04 PM", "8 41 PM") == -62167144740
func StrToTime(format, strtime string) (int64, error) {
	replacer := strings.NewReplacer(datePatterns...)
	format = replacer.Replace(format)
	cstZone := GetTimeZone()
	t, err := time.ParseInLocation(format, strtime, cstZone)
	if err != nil {
		return 0, err
	}
	return t.Unix(), nil
}

// Date date()
func Date(format string, ts ...time.Time) string {

	cstZone := GetTimeZone()
	replacer := strings.NewReplacer(datePatterns...)
	formats := replacer.Replace(format)
	t := time.Now()
	if len(ts) > 0 {
		t = ts[0]
	}

	res := t.In(cstZone).Format(formats)

	if format == "G" && res[:1] == "0" {
		return res[1:]
	}
	return res
}

// Checkdate checkdate()
// Validate a Gregorian date
func Checkdate(month, day, year int) bool {
	if month < 1 || month > 12 || day < 1 || day > 31 || year < 1 || year > 32767 {
		return false
	}
	switch month {
	case 4, 6, 9, 11:
		if day > 30 {
			return false
		}
	case 2:
		// leap year
		if year%4 == 0 && (year%100 != 0 || year%400 == 0) {
			if day > 29 {
				return false
			}
		} else if day > 28 {
			return false
		}
	}

	return true
}

// Sleep sleep()
func Sleep(t int64) {
	time.Sleep(time.Duration(t) * time.Second)
}

// Usleep usleep()
func Usleep(t int64) {
	time.Sleep(time.Duration(t) * time.Microsecond)
}

// Strpos strpos()
func Strpos(haystack, needle string, offset int) int {
	length := len(haystack)
	if length == 0 || offset > length || -offset > length {
		return -1
	}

	if offset < 0 {
		offset += length
	}
	pos := strings.Index(haystack[offset:], needle)
	if pos == -1 {
		return -1
	}
	return pos + offset
}

// Stripos stripos()
func Stripos(haystack, needle string, offset int) int {
	length := len(haystack)
	if length == 0 || offset > length || -offset > length {
		return -1
	}

	haystack = haystack[offset:]
	if offset < 0 {
		offset += length
	}
	pos := strings.Index(strings.ToLower(haystack), strings.ToLower(needle))
	if pos == -1 {
		return -1
	}
	return pos + offset
}

// StrRpos StrRpos()
func StrRpos(haystack, needle string, offset int) int {
	pos, length := 0, len(haystack)
	if length == 0 || offset > length || -offset > length {
		return -1
	}

	if offset < 0 {
		haystack = haystack[:offset+length+1]
	} else {
		haystack = haystack[offset:]
	}
	pos = strings.LastIndex(haystack, needle)
	if offset > 0 && pos != -1 {
		pos += offset
	}
	return pos
}

// StrRipos StrRipos()
func StrRipos(haystack, needle string, offset int) int {
	pos, length := 0, len(haystack)
	if length == 0 || offset > length || -offset > length {
		return -1
	}

	if offset < 0 {
		haystack = haystack[:offset+length+1]
	} else {
		haystack = haystack[offset:]
	}
	pos = strings.LastIndex(strings.ToLower(haystack), strings.ToLower(needle))
	if offset > 0 && pos != -1 {
		pos += offset
	}
	return pos
}

// StrReplace str_replace()
func StrReplace(search, replace, subject string, count int) string {
	return strings.Replace(subject, search, replace, count)
}

// StrToUpper StrToUpper()
func StrToUpper(str string) string {
	return strings.ToUpper(str)
}

// StrToLower StrToLower()
func StrToLower(str string) string {
	return strings.ToLower(str)
}

// UcFirst UcFirst()
func UcFirst(str string) string {
	for _, v := range str {
		u := string(unicode.ToUpper(v))
		return u + str[len(u):]
	}
	return ""
}

// LcFirst LcFirst()
func LcFirst(str string) string {
	for _, v := range str {
		u := string(unicode.ToLower(v))
		return u + str[len(u):]
	}
	return ""
}

// UcWords UcWords()
func UcWords(str string) string {
	return strings.Title(str)
}

// Substr substr()
func Substr(str string, start uint, length int) string {
	if start < 0 || length < -1 {
		return str
	}
	switch {
	case length == -1:
		return str[start:]
	case length == 0:
		return ""
	}
	end := int(start) + length
	if end > len(str) {
		end = len(str)
	}
	return str[start:end]
}

// Strrev strrev()
func Strrev(str string) string {
	runes := []rune(str)
	for i, j := 0, len(runes)-1; i < j; i, j = i+1, j-1 {
		runes[i], runes[j] = runes[j], runes[i]
	}
	return string(runes)
}

// ParseStr parse_str()
// f1=m&f2=n -> map[f1:m f2:n]
// f[a]=m&f[b]=n -> map[f:map[a:m b:n]]
// f[a][a]=m&f[a][b]=n -> map[f:map[a:map[a:m b:n]]]
// f[]=m&f[]=n -> map[f:[m n]]
// f[a][]=m&f[a][]=n -> map[f:map[a:[m n]]]
// f[][]=m&f[][]=n -> map[f:[map[]]] // Currently does not support nested slice.
// f=m&f[a]=n -> error // This is not the same as PHP.
// a .[[b=c -> map[a___[b:c]
func ParseStr(encodedString string, result map[string]interface{}) error {
	// build nested map.
	var build func(map[string]interface{}, []string, interface{}) error

	build = func(result map[string]interface{}, keys []string, value interface{}) error {
		length := len(keys)
		// trim ',"
		key := strings.Trim(keys[0], "'\"")
		if length == 1 {
			result[key] = value
			return nil
		}

		// The end is slice. like f[], f[a][]
		if keys[1] == "" && length == 2 {
			// todo nested slice
			if key == "" {
				return nil
			}
			val, ok := result[key]
			if !ok {
				result[key] = []interface{}{value}
				return nil
			}
			children, ok := val.([]interface{})
			if !ok {
				return fmt.Errorf("expected type '[]interface{}' for key '%s', but got '%T'", key, val)
			}
			result[key] = append(children, value)
			return nil
		}

		// The end is slice + map. like f[][a]
		if keys[1] == "" && length > 2 && keys[2] != "" {
			val, ok := result[key]
			if !ok {
				result[key] = []interface{}{}
				val = result[key]
			}
			children, ok := val.([]interface{})
			if !ok {
				return fmt.Errorf("expected type '[]interface{}' for key '%s', but got '%T'", key, val)
			}
			if l := len(children); l > 0 {
				if child, ok := children[l-1].(map[string]interface{}); ok {
					if _, ok := child[keys[2]]; !ok {
						_ = build(child, keys[2:], value)
						return nil
					}
				}
			}
			child := map[string]interface{}{}
			_ = build(child, keys[2:], value)
			result[key] = append(children, child)

			return nil
		}

		// map. like f[a], f[a][b]
		val, ok := result[key]
		if !ok {
			result[key] = map[string]interface{}{}
			val = result[key]
		}
		children, ok := val.(map[string]interface{})
		if !ok {
			return fmt.Errorf("expected type 'map[string]interface{}' for key '%s', but got '%T'", key, val)
		}

		return build(children, keys[1:], value)
	}

	// split encodedString.
	parts := strings.Split(encodedString, "&")
	for _, part := range parts {
		pos := strings.Index(part, "=")
		if pos <= 0 {
			continue
		}
		key, err := url.QueryUnescape(part[:pos])
		if err != nil {
			return err
		}
		for key[0] == ' ' {
			key = key[1:]
		}
		if key == "" || key[0] == '[' {
			continue
		}
		value, err := url.QueryUnescape(part[pos+1:])
		if err != nil {
			return err
		}

		// split into multiple keys
		var keys []string
		left := 0
		for i, k := range key {
			if k == '[' && left == 0 {
				left = i
			} else if k == ']' {
				if left > 0 {
					if len(keys) == 0 {
						keys = append(keys, key[:left])
					}
					keys = append(keys, key[left+1:i])
					left = 0
					if i+1 < len(key) && key[i+1] != '[' {
						break
					}
				}
			}
		}
		if len(keys) == 0 {
			keys = append(keys, key)
		}
		// first key
		first := ""
		for i, chr := range keys[0] {
			if chr == ' ' || chr == '.' || chr == '[' {
				first += "_"
			} else {
				first += string(chr)
			}
			if chr == '[' {
				first += keys[0][i+1:]
				break
			}
		}
		keys[0] = first

		// build nested map
		if err := build(result, keys, value); err != nil {
			return err
		}
	}

	return nil
}

// NumberFormat number_format()
// decimals: Sets the number of decimal points.
// decPoint: Sets the separator for the decimal point.
// thousandsSep: Sets the thousands separator.
func NumberFormat(number float64, decimals uint, decPoint, thousandsSep string) string {
	neg := false
	if number < 0 {
		number = -number
		neg = true
	}
	dec := int(decimals)
	// Will round off
	str := fmt.Sprintf("%."+strconv.Itoa(dec)+"F", number)
	prefix, suffix := "", ""
	if dec > 0 {
		prefix = str[:len(str)-(dec+1)]
		suffix = str[len(str)-dec:]
	} else {
		prefix = str
	}
	sep := []byte(thousandsSep)
	n, l1, l2 := 0, len(prefix), len(sep)
	// thousands sep num
	c := (l1 - 1) / 3
	tmp := make([]byte, l2*c+l1)
	pos := len(tmp) - 1
	for i := l1 - 1; i >= 0; i, n, pos = i-1, n+1, pos-1 {
		if l2 > 0 && n > 0 && n%3 == 0 {
			for j := range sep {
				tmp[pos] = sep[l2-j-1]
				pos--
			}
		}
		tmp[pos] = prefix[i]
	}
	s := string(tmp)
	if dec > 0 {
		s += decPoint + suffix
	}
	if neg {
		s = "-" + s
	}

	return s
}

// ChunkSplit chunk_split()
func ChunkSplit(body string, chunklen uint, end string) string {
	if end == "" {
		end = "\r\n"
	}
	runes, erunes := []rune(body), []rune(end)
	l := uint(len(runes))
	if l <= 1 || l < chunklen {
		return body + end
	}
	ns := make([]rune, 0, len(runes)+len(erunes))
	var i uint
	for i = 0; i < l; i += chunklen {
		if i+chunklen > l {
			ns = append(ns, runes[i:]...)
		} else {
			ns = append(ns, runes[i:i+chunklen]...)
		}
		ns = append(ns, erunes...)
	}
	return string(ns)
}

// StrWordCount str_word_count()
func StrWordCount(str string) []string {
	return strings.Fields(str)
}

// Wordwrap wordwrap()
func Wordwrap(str string, width uint, br string, cut bool) string {
	strlen := len(str)
	brlen := len(br)
	linelen := int(width)

	if strlen == 0 {
		return ""
	}
	if brlen == 0 {
		panic("break string cannot be empty")
	}
	if linelen == 0 && cut {
		panic("can't force cut when width is zero")
	}

	current, laststart, lastspace := 0, 0, 0
	var ns []byte
	for current = 0; current < strlen; current++ {
		if str[current] == br[0] && current+brlen < strlen && str[current:current+brlen] == br {
			ns = append(ns, str[laststart:current+brlen]...)
			current += brlen - 1
			lastspace = current + 1
			laststart = lastspace
		} else if str[current] == ' ' {
			if current-laststart >= linelen {
				ns = append(ns, str[laststart:current]...)
				ns = append(ns, br[:]...)
				laststart = current + 1
			}
			lastspace = current
		} else if current-laststart >= linelen && cut && laststart >= lastspace {
			ns = append(ns, str[laststart:current]...)
			ns = append(ns, br[:]...)
			laststart = current
			lastspace = current
		} else if current-laststart >= linelen && laststart < lastspace {
			ns = append(ns, str[laststart:lastspace]...)
			ns = append(ns, br[:]...)
			lastspace++
			laststart = lastspace
		}
	}

	if laststart != current {
		ns = append(ns, str[laststart:current]...)
	}
	return string(ns)
}

// Strlen strlen()
func Strlen(str string) int {
	return len(str)
}

// MbStrlen mb_strlen()
func MbStrlen(str string) int {
	return utf8.RuneCountInString(str)
}

// StrRepeat str_repeat()
func StrRepeat(input string, multiplier int) string {
	return strings.Repeat(input, multiplier)
}

// Strstr strstr()
func Strstr(haystack string, needle string) string {
	if needle == "" {
		return ""
	}
	idx := strings.Index(haystack, needle)
	if idx == -1 {
		return ""
	}
	return haystack[idx+len([]byte(needle))-1:]
}

// Strtr strtr()
//
// If the parameter length is 1, type is: map[string]string
// Strtr("baab", map[string]string{"ab": "01"}) will return "ba01"
// If the parameter length is 2, type is: string, string
// Strtr("baab", "ab", "01") will return "1001", a => 0; b => 1.
func Strtr(haystack string, params ...interface{}) string {
	ac := len(params)
	if ac == 1 {
		pairs := params[0].(map[string]string)
		length := len(pairs)
		if length == 0 {
			return haystack
		}
		oldnew := make([]string, length*2)
		for o, n := range pairs {
			if o == "" {
				return haystack
			}
			oldnew = append(oldnew, o, n)
		}
		return strings.NewReplacer(oldnew...).Replace(haystack)
	} else if ac == 2 {
		from := params[0].(string)
		to := params[1].(string)
		trlen, lt := len(from), len(to)
		if trlen > lt {
			trlen = lt
		}
		if trlen == 0 {
			return haystack
		}

		str := make([]uint8, len(haystack))
		var xlat [256]uint8
		var i int
		var j uint8
		if trlen == 1 {
			for i = 0; i < len(haystack); i++ {
				if haystack[i] == from[0] {
					str[i] = to[0]
				} else {
					str[i] = haystack[i]
				}
			}
			return string(str)
		}
		// trlen != 1
		for {
			xlat[j] = j
			if j++; j == 0 {
				break
			}
		}
		for i = 0; i < trlen; i++ {
			xlat[from[i]] = to[i]
		}
		for i = 0; i < len(haystack); i++ {
			str[i] = xlat[haystack[i]]
		}
		return string(str)
	}

	return haystack
}

// StrShuffle str_shuffle()
func StrShuffle(str string) string {
	runes := []rune(str)
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	s := make([]rune, len(runes))
	for i, v := range r.Perm(len(runes)) {
		s[i] = runes[v]
	}
	return string(s)
}

// Trim trim()
func Trim(str string, characterMask ...string) string {
	if len(characterMask) == 0 {
		return strings.TrimSpace(str)
	}
	return strings.Trim(str, characterMask[0])
}

//StrTrim 去除空格
func StrTrim(str string) string {
	return strings.TrimSpace(str)
}

// Ltrim ltrim()
func Ltrim(str string, characterMask ...string) string {
	if len(characterMask) == 0 {
		return strings.TrimLeftFunc(str, unicode.IsSpace)
	}
	return strings.TrimLeft(str, characterMask[0])
}

// Rtrim rtrim()
func Rtrim(str string, characterMask ...string) string {
	if len(characterMask) == 0 {
		return strings.TrimRightFunc(str, unicode.IsSpace)
	}
	return strings.TrimRight(str, characterMask[0])
}

// Explode explode()
func Explode(delimiter, str string) []string {
	return strings.Split(str, delimiter)
}

// Chr chr()
func Chr(ascii int) string {
	return string(ascii)
}

// Ord ord()
func Ord(char string) int {
	r, _ := utf8.DecodeRune([]byte(char))
	return int(r)
}

// Nl2br nl2br()
// \n\r, \r\n, \r, \n
func Nl2br(str string, isXhtml bool) string {
	r, n, runes := '\r', '\n', []rune(str)
	var br []byte
	if isXhtml {
		br = []byte("<br />")
	} else {
		br = []byte("<br>")
	}
	skip := false
	length := len(runes)
	var buf bytes.Buffer
	for i, v := range runes {
		if skip {
			skip = false
			continue
		}
		switch v {
		case n, r:
			if (i+1 < length) && (v == r && runes[i+1] == n) || (v == n && runes[i+1] == r) {
				buf.Write(br)
				skip = true
				continue
			}
			buf.Write(br)
		default:
			buf.WriteRune(v)
		}
	}
	return buf.String()
}

// JSONDecode json_decode()
func JSONDecode(data []byte, val interface{}) error {
	return json.Unmarshal(data, val)
}

// JSONEncode json_encode()
func JSONEncode(val interface{}) ([]byte, error) {
	return json.Marshal(val)
}

// Addslashes addslashes()
func Addslashes(str string) string {
	var buf bytes.Buffer
	for _, char := range str {
		switch char {
		case '\'', '"', '\\':
			buf.WriteRune('\\')
		}
		buf.WriteRune(char)
	}
	return buf.String()
}

// Stripslashes stripslashes()
func Stripslashes(str string) string {
	var buf bytes.Buffer
	l, skip := len(str), false
	for i, char := range str {
		if skip {
			skip = false
		} else if char == '\\' {
			if i+1 < l && str[i+1] == '\\' {
				skip = true
			}
			continue
		}
		buf.WriteRune(char)
	}
	return buf.String()
}

// Quotemeta quotemeta()
func Quotemeta(str string) string {
	var buf bytes.Buffer
	for _, char := range str {
		switch char {
		case '.', '+', '\\', '(', '$', ')', '[', '^', ']', '*', '?':
			buf.WriteRune('\\')
		}
		buf.WriteRune(char)
	}
	return buf.String()
}

// Htmlentities htmlentities()
func Htmlentities(str string) string {
	return html.EscapeString(str)
}

// HTMLEntityDecode html_entity_decode()
func HTMLEntityDecode(str string) string {
	return html.UnescapeString(str)
}

// Md5 md5()
func Md5(str string) string {
	hash := md5.New()
	hash.Write([]byte(str))
	return hex.EncodeToString(hash.Sum(nil))
}

// Md5File md5_file()
func Md5File(path string) (string, error) {
	data, err := ioutil.ReadFile(path)
	if err != nil {
		return "", err
	}
	hash := md5.New()
	hash.Write([]byte(data))
	return hex.EncodeToString(hash.Sum(nil)), nil
}

// Sha1 sha1()
func Sha1(str string) string {
	hash := sha1.New()
	hash.Write([]byte(str))
	return hex.EncodeToString(hash.Sum(nil))
}

// Sha1File sha1_file()
func Sha1File(path string) (string, error) {
	data, err := ioutil.ReadFile(path)
	if err != nil {
		return "", err
	}
	hash := sha1.New()
	hash.Write([]byte(data))
	return hex.EncodeToString(hash.Sum(nil)), nil
}

// Crc32 crc32()
func Crc32(str string) uint32 {
	return crc32.ChecksumIEEE([]byte(str))
}

// Levenshtein levenshtein()
// costIns: Defines the cost of insertion.
// costRep: Defines the cost of replacement.
// costDel: Defines the cost of deletion.
func Levenshtein(str1, str2 string, costIns, costRep, costDel int) int {
	var maxLen = 255
	l1 := len(str1)
	l2 := len(str2)
	if l1 == 0 {
		return l2 * costIns
	}
	if l2 == 0 {
		return l1 * costDel
	}
	if l1 > maxLen || l2 > maxLen {
		return -1
	}

	p1 := make([]int, l2+1)
	p2 := make([]int, l2+1)
	var c0, c1, c2 int
	var i1, i2 int
	for i2 := 0; i2 <= l2; i2++ {
		p1[i2] = i2 * costIns
	}
	for i1 = 0; i1 < l1; i1++ {
		p2[0] = p1[0] + costDel
		for i2 = 0; i2 < l2; i2++ {
			if str1[i1] == str2[i2] {
				c0 = p1[i2]
			} else {
				c0 = p1[i2] + costRep
			}
			c1 = p1[i2+1] + costDel
			if c1 < c0 {
				c0 = c1
			}
			c2 = p2[i2] + costIns
			if c2 < c0 {
				c0 = c2
			}
			p2[i2+1] = c0
		}
		tmp := p1
		p1 = p2
		p2 = tmp
	}
	c0 = p1[l2]

	return c0
}

// SimilarText similar_text()
func SimilarText(first, second string, percent *float64) int {
	var similarText func(string, string, int, int) int
	similarText = func(str1, str2 string, len1, len2 int) int {
		var sum, max int
		pos1, pos2 := 0, 0

		// Find the longest segment of the same section in two strings
		for i := 0; i < len1; i++ {
			for j := 0; j < len2; j++ {
				for l := 0; (i+l < len1) && (j+l < len2) && (str1[i+l] == str2[j+l]); l++ {
					if l+1 > max {
						max = l + 1
						pos1 = i
						pos2 = j
					}
				}
			}
		}

		if sum = max; sum > 0 {
			if pos1 > 0 && pos2 > 0 {
				sum += similarText(str1, str2, pos1, pos2)
			}
			if (pos1+max < len1) && (pos2+max < len2) {
				s1 := []byte(str1)
				s2 := []byte(str2)
				sum += similarText(string(s1[pos1+max:]), string(s2[pos2+max:]), len1-pos1-max, len2-pos2-max)
			}
		}

		return sum
	}

	l1, l2 := len(first), len(second)
	if l1+l2 == 0 {
		return 0
	}
	sim := similarText(first, second, l1, l2)
	if percent != nil {
		*percent = float64(sim*200) / float64(l1+l2)
	}
	return sim
}

// Soundex soundex()
// Calculate the soundex key of a string.
func Soundex(str string) string {
	if str == "" {
		panic("str: cannot be an empty string")
	}
	table := [26]rune{
		// A, B, C, D
		'0', '1', '2', '3',
		// E, F, G
		'0', '1', '2',
		// H
		'0',
		// I, J, K, L, M, N
		'0', '2', '2', '4', '5', '5',
		// O, P, Q, R, S, T
		'0', '1', '2', '6', '2', '3',
		// U, V
		'0', '1',
		// W, X
		'0', '2',
		// Y, Z
		'0', '2',
	}
	last, code, small := -1, 0, 0
	sd := make([]rune, 4)
	// build soundex string
	for i := 0; i < len(str) && small < 4; i++ {
		// ToUpper
		char := str[i]
		if char < '\u007F' && 'a' <= char && char <= 'z' {
			code = int(char - 'a' + 'A')
		} else {
			code = int(char)
		}
		if code >= 'A' && code <= 'Z' {
			if small == 0 {
				sd[small] = rune(code)
				small++
				last = int(table[code-'A'])
			} else {
				code = int(table[code-'A'])
				if code != last {
					if code != 0 {
						sd[small] = rune(code)
						small++
					}
					last = code
				}
			}
		}
	}
	// pad with "0"
	for ; small < 4; small++ {
		sd[small] = '0'
	}
	return string(sd)
}

//////////// URL Functions ////////////

// ParseURL parse_url()
// Parse a URL and return its components
// -1: all; 1: scheme; 2: host; 4: port; 8: user; 16: pass; 32: path; 64: query; 128: fragment
func ParseURL(str string, component int) (map[string]string, error) {
	u, err := url.Parse(str)
	if err != nil {
		return nil, err
	}
	if component == -1 {
		component = 1 | 2 | 4 | 8 | 16 | 32 | 64 | 128
	}
	var components = make(map[string]string)
	if (component & 1) == 1 {
		components["scheme"] = u.Scheme
	}
	if (component & 2) == 2 {
		components["host"] = u.Hostname()
	}
	if (component & 4) == 4 {
		components["port"] = u.Port()
	}
	if (component & 8) == 8 {
		components["user"] = u.User.Username()
	}
	if (component & 16) == 16 {
		components["pass"], _ = u.User.Password()
	}
	if (component & 32) == 32 {
		components["path"] = u.Path
	}
	if (component & 64) == 64 {
		components["query"] = u.RawQuery
	}
	if (component & 128) == 128 {
		components["fragment"] = u.Fragment
	}
	return components, nil
}

// URLEncode urlencode()
func URLEncode(str string) string {
	return url.QueryEscape(str)
}

// URLDecode urldecode()
func URLDecode(str string) (string, error) {
	return url.QueryUnescape(str)
}

// Rawurlencode rawurlencode()
func Rawurlencode(str string) string {
	return strings.Replace(url.QueryEscape(str), "+", "%20", -1)
}

// Rawurldecode rawurldecode()
func Rawurldecode(str string) (string, error) {
	return url.QueryUnescape(strings.Replace(str, "%20", "+", -1))
}

// HTTPBuildQuery http_build_query()
func HTTPBuildQuery(queryData url.Values) string {
	return queryData.Encode()
}

// Base64Encode base64_encode()
func Base64Encode(str string) string {
	return base64.StdEncoding.EncodeToString([]byte(str))
}

// Base64Decode base64_decode()
func Base64Decode(str string) (string, error) {
	switch len(str) % 4 {
	case 2:
		str += "=="
	case 3:
		str += "="
	}

	data, err := base64.StdEncoding.DecodeString(str)
	if err != nil {
		return "", err
	}
	return string(data), nil
}

//////////// Array(Slice/Map) Functions ////////////

// ArrayFill array_fill()
func ArrayFill(startIndex int, num uint, value interface{}) map[int]interface{} {
	m := make(map[int]interface{})
	var i uint
	for i = 0; i < num; i++ {
		m[startIndex] = value
		startIndex++
	}
	return m
}

// ArrayFlip array_flip()
func ArrayFlip(m map[interface{}]interface{}) map[interface{}]interface{} {
	n := make(map[interface{}]interface{})
	for i, v := range m {
		n[v] = i
	}
	return n
}

// ArrayKeys array_keys()
func ArrayKeys(elements map[interface{}]interface{}) []interface{} {
	i, keys := 0, make([]interface{}, len(elements))
	for key := range elements {
		keys[i] = key
		i++
	}
	return keys
}

// ArrayValues array_values()
func ArrayValues(elements map[interface{}]interface{}) []interface{} {
	i, vals := 0, make([]interface{}, len(elements))
	for _, val := range elements {
		vals[i] = val
		i++
	}
	return vals
}

// ArrayMerge array_merge()
func ArrayMerge(ss ...[]interface{}) []interface{} {
	n := 0
	for _, v := range ss {
		n += len(v)
	}
	s := make([]interface{}, 0, n)
	for _, v := range ss {
		s = append(s, v...)
	}
	return s
}

// ArrayChunk array_chunk()
func ArrayChunk(s []interface{}, size int) [][]interface{} {
	if size < 1 {
		panic("size: cannot be less than 1")
	}
	length := len(s)
	chunks := int(math.Ceil(float64(length) / float64(size)))
	var n [][]interface{}
	for i, end := 0, 0; chunks > 0; chunks-- {
		end = (i + 1) * size
		if end > length {
			end = length
		}
		n = append(n, s[i*size:end])
		i++
	}
	return n
}

// ArrayPad array_pad()
func ArrayPad(s []interface{}, size int, val interface{}) []interface{} {
	if size == 0 || (size > 0 && size < len(s)) || (size < 0 && size > -len(s)) {
		return s
	}
	n := size
	if size < 0 {
		n = -size
	}
	n -= len(s)
	tmp := make([]interface{}, n)
	for i := 0; i < n; i++ {
		tmp[i] = val
	}
	if size > 0 {
		return append(s, tmp...)
	}
	return append(tmp, s...)
}

// ArraySlice array_slice()
func ArraySlice(s []interface{}, offset, length uint) []interface{} {
	if offset > uint(len(s)) {
		panic("offset: the offset is less than the length of s")
	}
	end := offset + length
	if end < uint(len(s)) {
		return s[offset:end]
	}
	return s[offset:]
}

// ArrayRand array_rand()
func ArrayRand(elements []interface{}) []interface{} {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	n := make([]interface{}, len(elements))
	for i, v := range r.Perm(len(elements)) {
		n[i] = elements[v]
	}
	return n
}

//ArrayRandMap 随即
func ArrayRandMap(elements []map[string]string) []map[string]string {
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	n := make([]map[string]string, len(elements))
	for i, v := range r.Perm(len(elements)) {
		n[i] = elements[v]
	}
	return n
}

// ArrayColumn array_column()
func ArrayColumn(input map[string]map[string]interface{}, columnKey string) []interface{} {
	columns := make([]interface{}, 0, len(input))
	for _, val := range input {
		if v, ok := val[columnKey]; ok {
			columns = append(columns, v)
		}
	}
	return columns
}

// ArrayPush array_push()
// Push one or more elements onto the end of slice
func ArrayPush(s *[]interface{}, elements ...interface{}) int {
	*s = append(*s, elements...)
	return len(*s)
}

// ArrayPop array_pop()
// Pop the element off the end of slice
func ArrayPop(s *[]interface{}) interface{} {
	if len(*s) == 0 {
		return nil
	}
	ep := len(*s) - 1
	e := (*s)[ep]
	*s = (*s)[:ep]
	return e
}

// ArrayUnshift array_unshift()
// Prepend one or more elements to the beginning of a slice
func ArrayUnshift(s *[]interface{}, elements ...interface{}) int {
	*s = append(elements, *s...)
	return len(*s)
}

// ArrayShift array_shift()
// Shift an element off the beginning of slice
func ArrayShift(s *[]interface{}) interface{} {
	if len(*s) == 0 {
		return nil
	}
	f := (*s)[0]
	*s = (*s)[1:]
	return f
}

// ArrayKeyExists array_key_exists()
func ArrayKeyExists(key interface{}, m map[interface{}]interface{}) bool {
	_, ok := m[key]
	return ok
}

// ArrayCombine array_combine()
func ArrayCombine(s1, s2 []interface{}) map[interface{}]interface{} {
	if len(s1) != len(s2) {
		panic("the number of elements for each slice isn't equal")
	}
	m := make(map[interface{}]interface{}, len(s1))
	for i, v := range s1 {
		m[v] = s2[i]
	}
	return m
}

// ArrayReverse array_reverse()
func ArrayReverse(s []interface{}) []interface{} {
	for i, j := 0, len(s)-1; i < j; i, j = i+1, j-1 {
		s[i], s[j] = s[j], s[i]
	}
	return s
}

// Implode implode()
func Implode(glue string, pieces []string) string {
	var buf bytes.Buffer
	l := len(pieces)
	for _, str := range pieces {
		buf.WriteString(str)
		if l--; l > 0 {
			buf.WriteString(glue)
		}
	}
	return buf.String()
}

// InArray in_array()
// haystack supported types: slice, array or map
func InArray(needle interface{}, haystack interface{}) bool {
	val := reflect.ValueOf(haystack)
	switch val.Kind() {
	case reflect.Slice, reflect.Array:
		for i := 0; i < val.Len(); i++ {
			if reflect.DeepEqual(needle, val.Index(i).Interface()) {
				return true
			}
		}
	case reflect.Map:
		for _, k := range val.MapKeys() {
			if reflect.DeepEqual(needle, val.MapIndex(k).Interface()) {
				return true
			}
		}
	default:
		panic("haystack: haystack type muset be slice, array or map")
	}

	return false
}

//判断二维数组里面是不是只有一条数据
func MultiArray(haystack interface{}) bool {
	val := reflect.ValueOf(haystack)
	switch val.Kind() {
	case reflect.Slice, reflect.Array:
		if val.Len() > 1 {
			return true
		}
	default:
		return false
	}
	return false
}

//////////// Mathematical Functions ////////////

// Abs abs()
func Abs(number float64) float64 {
	return math.Abs(number)
}

// Rand rand()
// Range: [0, 2147483647]
func Rand(min, max int) int {
	if min > max {
		panic("min: min cannot be greater than max")
	}
	// PHP: getrandmax()
	if int31 := 1<<31 - 1; max > int31 {
		panic("max: max can not be greater than " + strconv.Itoa(int31))
	}
	if min == max {
		return min
	}
	r := rand.New(rand.NewSource(time.Now().UnixNano()))
	return r.Intn(max+1-min) + min
}

// Round round()
func Round(value float64) float64 {
	return math.Floor(value + 0.5)
}

// Floor floor()
func Floor(value float64) float64 {
	return math.Floor(value)
}

// Ceil ceil()
func Ceil(value float64) float64 {
	return math.Ceil(value)
}

// Pi pi()
func Pi() float64 {
	return math.Pi
}

// Max max()
func Max(nums ...float64) float64 {
	if len(nums) < 2 {
		panic("nums: the nums length is less than 2")
	}
	max := nums[0]
	for i := 1; i < len(nums); i++ {
		max = math.Max(max, nums[i])
	}
	return max
}

// Min min()
func Min(nums ...float64) float64 {
	if len(nums) < 2 {
		panic("nums: the nums length is less than 2")
	}
	min := nums[0]
	for i := 1; i < len(nums); i++ {
		min = math.Min(min, nums[i])
	}
	return min
}

// Decbin decbin()
func Decbin(number int64) string {
	return strconv.FormatInt(number, 2)
}

// Bindec bindec()
func Bindec(str string) (string, error) {
	i, err := strconv.ParseInt(str, 2, 0)
	if err != nil {
		return "", err
	}
	return strconv.FormatInt(i, 10), nil
}

// Hex2bin hex2bin()
func Hex2bin(data string) (string, error) {
	i, err := strconv.ParseInt(data, 16, 0)
	if err != nil {
		return "", err
	}
	return strconv.FormatInt(i, 2), nil
}

// Bin2hex bin2hex()
func Bin2hex(str string) (string, error) {
	i, err := strconv.ParseInt(str, 2, 0)
	if err != nil {
		return "", err
	}
	return strconv.FormatInt(i, 16), nil
}

// Dechex dechex()
func Dechex(number int64) string {
	return strconv.FormatInt(number, 16)
}

// Hexdec hexdec()
func Hexdec(str string) (int64, error) {
	return strconv.ParseInt(str, 16, 0)
}

// Decoct decoct()
func Decoct(number int64) string {
	return strconv.FormatInt(number, 8)
}

// Octdec Octdec()
func Octdec(str string) (int64, error) {
	return strconv.ParseInt(str, 8, 0)
}

// BaseConvert base_convert()
func BaseConvert(number string, frombase, tobase int) (string, error) {
	i, err := strconv.ParseInt(number, frombase, 0)
	if err != nil {
		return "", err
	}
	return strconv.FormatInt(i, tobase), nil
}

// IsNan is_nan()
func IsNan(val float64) bool {
	return math.IsNaN(val)
}

//////////// Directory/Filesystem Functions ////////////

// Stat stat()
func Stat(filename string) (os.FileInfo, error) {
	return os.Stat(filename)
}

// Pathinfo pathinfo()
// -1: all; 1: dirname; 2: basename; 4: extension; 8: filename
// Usage:
// Pathinfo("/home/go/path/src/php2go/php2go.go", 1|2|4|8)
func Pathinfo(path string, options int) map[string]string {
	if options == -1 {
		options = 1 | 2 | 4 | 8
	}
	info := make(map[string]string)
	if (options & 1) == 1 {
		info["dirname"] = filepath.Dir(path)
	}
	if (options & 2) == 2 {
		info["basename"] = filepath.Base(path)
	}
	if ((options & 4) == 4) || ((options & 8) == 8) {
		basename := ""
		if (options & 2) == 2 {
			basename, _ = info["basename"]
		} else {
			basename = filepath.Base(path)
		}
		p := strings.LastIndex(basename, ".")
		filename, extension := "", ""
		if p > 0 {
			filename, extension = basename[:p], basename[p+1:]
		} else if p == -1 {
			filename = basename
		} else if p == 0 {
			extension = basename[p+1:]
		}
		if (options & 4) == 4 {
			info["extension"] = extension
		}
		if (options & 8) == 8 {
			info["filename"] = filename
		}
	}
	return info
}

// FileExists file_exists()
func FileExists(filename string) bool {
	_, err := os.Stat(filename)
	if err != nil && os.IsNotExist(err) {
		return false
	}
	return true
}

// IsFile is_file()
func IsFile(filename string) bool {
	_, err := os.Stat(filename)
	if err != nil && os.IsNotExist(err) {
		return false
	}
	return true
}

// IsDir is_dir()
func IsDir(filename string) (bool, error) {
	fd, err := os.Stat(filename)
	if err != nil {
		return false, err
	}
	fm := fd.Mode()
	return fm.IsDir(), nil
}

// FileSize filesize()
func FileSize(filename string) (int64, error) {
	info, err := os.Stat(filename)
	if err != nil && os.IsNotExist(err) {
		return 0, err
	}
	return info.Size(), nil
}

// FilePutContents file_put_contents()
func FilePutContents(filename string, data string, mode os.FileMode) error {
	return ioutil.WriteFile(filename, []byte(data), mode)
}

// FileGetContents file_get_contents()
func FileGetContents(filename string) (string, error) {
	data, err := ioutil.ReadFile(filename)
	return string(data), err
}

// Unlink unlink()
func Unlink(filename string) error {
	return os.Remove(filename)
}

// Delete delete()
func Delete(filename string) error {
	return os.Remove(filename)
}

// Copy copy()
func Copy(source, dest string) (bool, error) {
	fd1, err := os.Open(source)
	if err != nil {
		return false, err
	}
	defer fd1.Close()
	fd2, err := os.OpenFile(dest, os.O_WRONLY|os.O_CREATE, 0644)
	if err != nil {
		return false, err
	}
	defer fd2.Close()
	_, e := io.Copy(fd2, fd1)
	if e != nil {
		return false, e
	}
	return true, nil
}

// IsReadable is_readable()
func IsReadable(filename string) bool {
	_, err := syscall.Open(filename, syscall.O_RDONLY, 0)
	if err != nil {
		return false
	}
	return true
}

// IsWriteable is_writeable()
func IsWriteable(filename string) bool {
	_, err := syscall.Open(filename, syscall.O_WRONLY, 0)
	if err != nil {
		return false
	}
	return true
}

// Rename rename()
func Rename(oldname, newname string) error {
	return os.Rename(oldname, newname)
}

// Touch touch()
func Touch(filename string) (bool, error) {
	fd, err := os.OpenFile(filename, os.O_RDONLY|os.O_CREATE, 0666)
	if err != nil {
		return false, err
	}
	fd.Close()
	return true, nil
}

// Mkdir mkdir()
func Mkdir(filename string, mode os.FileMode) error {
	return os.Mkdir(filename, mode)
}

//MkdirAll 创建文件夹
func MkdirAll(filename string, mode os.FileMode) error {
	return os.MkdirAll(filename, mode)
}

// Getcwd getcwd()
func Getcwd() (string, error) {
	dir, err := os.Getwd()
	return dir, err
}

// Realpath realpath()
func Realpath(path string) (string, error) {
	return filepath.Abs(path)
}

// Basename basename()
func Basename(path string) string {
	return filepath.Base(path)
}

// Chmod chmod()
func Chmod(filename string, mode os.FileMode) error {
	return os.Chmod(filename, mode)
}

// Chown chown()
func Chown(filename string, uid, gid int) error {
	return os.Chown(filename, uid, gid)
}

// Fclose fclose()
func Fclose(handle *os.File) error {
	return handle.Close()
}

// Filemtime filemtime()
func Filemtime(filename string) (int64, error) {
	fd, err := os.Open(filename)
	if err != nil {
		return 0, err
	}
	defer fd.Close()
	fileinfo, err := fd.Stat()
	if err != nil {
		return 0, err
	}
	return fileinfo.ModTime().Unix(), nil
}

// Fgetcsv fgetcsv()
func Fgetcsv(handle *os.File, length int, delimiter rune) ([][]string, error) {
	reader := csv.NewReader(handle)
	reader.Comma = delimiter
	// TODO length limit
	return reader.ReadAll()
}

// Glob glob()
func Glob(pattern string) ([]string, error) {
	return filepath.Glob(pattern)
}

//////////// Variable handling Functions ////////////

// Empty empty()
func Empty(val interface{}) bool {
	if val == nil {
		return true
	}
	v := reflect.ValueOf(val)
	switch v.Kind() {
	case reflect.String, reflect.Array:
		return v.Len() == 0
	case reflect.Map, reflect.Slice:
		return v.Len() == 0 || v.IsNil()
	case reflect.Bool:
		return !v.Bool()
	case reflect.Int, reflect.Int8, reflect.Int16, reflect.Int32, reflect.Int64:
		return v.Int() == 0
	case reflect.Uint, reflect.Uint8, reflect.Uint16, reflect.Uint32, reflect.Uint64, reflect.Uintptr:
		return v.Uint() == 0
	case reflect.Float32, reflect.Float64:
		return v.Float() == 0
	case reflect.Interface, reflect.Ptr:
		return v.IsNil()
	}

	return reflect.DeepEqual(val, reflect.Zero(v.Type()).Interface())
}

// IsNumeric is_numeric()
// Numeric strings consist of optional sign, any number of digits, optional decimal part and optional exponential part.
// Thus +0123.45e6 is a valid numeric value.
// In PHP hexadecimal (e.g. 0xf4c3b00c) is not supported, but IsNumeric is supported.
func IsNumeric(val interface{}) bool {
	switch val.(type) {
	case int, int8, int16, int32, int64, uint, uint8, uint16, uint32, uint64:
		return true
	case float32, float64, complex64, complex128:
		return true
	case string:
		str := val.(string)
		if str == "" {
			return false
		}
		// Trim any whitespace
		str = strings.TrimSpace(str)
		if str[0] == '-' || str[0] == '+' {
			if len(str) == 1 {
				return false
			}
			str = str[1:]
		}
		// hex
		if len(str) > 2 && str[0] == '0' && (str[1] == 'x' || str[1] == 'X') {
			for _, h := range str[2:] {
				if !((h >= '0' && h <= '9') || (h >= 'a' && h <= 'f') || (h >= 'A' && h <= 'F')) {
					return false
				}
			}
			return true
		}
		// 0-9, Point, Scientific
		p, s, l := 0, 0, len(str)
		for i, v := range str {
			if v == '.' { // Point
				if p > 0 || s > 0 || i+1 == l {
					return false
				}
				p = i
			} else if v == 'e' || v == 'E' { // Scientific
				if i == 0 || s > 0 || i+1 == l {
					return false
				}
				s = i
			} else if v < '0' || v > '9' {
				return false
			}
		}
		return true
	}

	return false
}

//////////// Program execution Functions ////////////

// Exec exec()
// returnVar, 0: succ; 1: fail
// Return the last line from the result of the command.
// command format eg:
//   "ls -a"
//   "/bin/bash -c \"ls -a\""
func Exec(command string, output *[]string, returnVar *int) string {
	q := rune(0)
	parts := strings.FieldsFunc(command, func(r rune) bool {
		switch {
		case r == q:
			q = rune(0)
			return false
		case q != rune(0):
			return false
		case unicode.In(r, unicode.Quotation_Mark):
			q = r
			return false
		default:
			return unicode.IsSpace(r)
		}
	})
	// remove the " and ' on both sides
	for i, v := range parts {
		f, l := v[0], len(v)
		if l >= 2 && (f == '"' || f == '\'') {
			parts[i] = v[1 : l-1]
		}
	}
	cmd := exec.Command(parts[0], parts[1:]...)
	out, err := cmd.CombinedOutput()
	if err != nil {
		*returnVar = 1
		return ""
	}
	*returnVar = 0
	*output = strings.Split(strings.TrimRight(string(out), "\n"), "\n")
	if l := len(*output); l > 0 {
		return (*output)[l-1]
	}
	return ""
}

// System system()
// returnVar, 0: succ; 1: fail
// Returns the last line of the command output on success, and "" on failure.
func System(command string, returnVar *int) string {
	*returnVar = 0
	var stdBuf bytes.Buffer
	var err, err1, err2, err3 error

	// split command
	q := rune(0)
	parts := strings.FieldsFunc(command, func(r rune) bool {
		switch {
		case r == q:
			q = rune(0)
			return false
		case q != rune(0):
			return false
		case unicode.In(r, unicode.Quotation_Mark):
			q = r
			return false
		default:
			return unicode.IsSpace(r)
		}
	})
	// remove the " and ' on both sides
	for i, v := range parts {
		f, l := v[0], len(v)
		if l >= 2 && (f == '"' || f == '\'') {
			parts[i] = v[1 : l-1]
		}
	}
	cmd := exec.Command(parts[0], parts[1:]...)
	stdoutIn, _ := cmd.StdoutPipe()
	stderrIn, _ := cmd.StderrPipe()
	stdout := io.MultiWriter(os.Stdout, &stdBuf)
	stderr := io.MultiWriter(os.Stderr, &stdBuf)

	err = cmd.Start()
	if err != nil {
		*returnVar = 1
		return ""
	}

	go func() {
		_, err1 = io.Copy(stdout, stdoutIn)
	}()
	go func() {
		_, err2 = io.Copy(stderr, stderrIn)
	}()

	err3 = cmd.Wait()
	if err1 != nil || err2 != nil || err3 != nil {
		if err1 != nil {
			fmt.Println(err1)
		}
		if err2 != nil {
			fmt.Println(err2)
		}
		if err3 != nil {
			fmt.Println(err3)
		}
		*returnVar = 1
		return ""
	}
	if output := strings.TrimRight(stdBuf.String(), "\n"); output != "" {
		pos := strings.LastIndex(output, "\n")
		if pos == -1 {
			return output
		}
		return output[pos+1:]
	}
	return ""
}

// Passthru passthru()
// returnVar, 0: succ; 1: fail
func Passthru(command string, returnVar *int) {
	q := rune(0)
	parts := strings.FieldsFunc(command, func(r rune) bool {
		switch {
		case r == q:
			q = rune(0)
			return false
		case q != rune(0):
			return false
		case unicode.In(r, unicode.Quotation_Mark):
			q = r
			return false
		default:
			return unicode.IsSpace(r)
		}
	})
	// remove the " and ' on both sides
	for i, v := range parts {
		f, l := v[0], len(v)
		if l >= 2 && (f == '"' || f == '\'') {
			parts[i] = v[1 : l-1]
		}
	}
	cmd := exec.Command(parts[0], parts[1:]...)
	cmd.Stdout = os.Stdout
	cmd.Stderr = os.Stderr
	err := cmd.Run()
	if err != nil {
		*returnVar = 1
		fmt.Println(err)
	} else {
		*returnVar = 0
	}
}

//////////// Network Functions ////////////

// Gethostname gethostname()
func Gethostname() (string, error) {
	return os.Hostname()
}

// GethostByName GethostByName()
// Get the IPv4 address corresponding to a given Internet host name
func GethostByName(hostname string) (string, error) {
	ips, err := net.LookupIP(hostname)
	if ips != nil {
		for _, v := range ips {
			if v.To4() != nil {
				return v.String(), nil
			}
		}
		return "", nil
	}
	return "", err
}

// GethostByNamel GethostByNamel()
// Get a list of IPv4 addresses corresponding to a given Internet host name
func GethostByNamel(hostname string) ([]string, error) {
	ips, err := net.LookupIP(hostname)
	if ips != nil {
		var ipstrs []string
		for _, v := range ips {
			if v.To4() != nil {
				ipstrs = append(ipstrs, v.String())
			}
		}
		return ipstrs, nil
	}
	return nil, err
}

// GethostByAddr GethostByAddr()
// Get the Internet host name corresponding to a given IP address
func GethostByAddr(ipAddress string) (string, error) {
	names, err := net.LookupAddr(ipAddress)
	if names != nil {
		return strings.TrimRight(names[0], "."), nil
	}
	return "", err
}

// IP2long ip2long()
// IPv4
func IP2long(ipAddress string) uint32 {
	ip := net.ParseIP(ipAddress)
	if ip == nil {
		return 0
	}
	return binary.BigEndian.Uint32(ip.To4())
}

// Long2ip long2ip()
// IPv4
func Long2ip(properAddress uint32) string {
	ipByte := make([]byte, 4)
	binary.BigEndian.PutUint32(ipByte, properAddress)
	ip := net.IP(ipByte)
	return ip.String()
}

//////////// Misc. Functions ////////////

// Echo echo
func Echo(args ...interface{}) {
	fmt.Print(args...)
}

// Uniqid uniqid()
func Uniqid(prefix string) string {
	now := time.Now()
	return fmt.Sprintf("%s%08x%05x", prefix, now.Unix(), now.UnixNano()%0x100000)
}

// Exit exit()
func Exit(status int) {
	os.Exit(status)
}

// Die die()
func Die(status int) {
	os.Exit(status)
}

// Getenv getenv()
func Getenv(varname string) string {
	return os.Getenv(varname)
}

// Putenv putenv()
// The setting, like "FOO=BAR"
func Putenv(setting string) error {
	s := strings.Split(setting, "=")
	if len(s) != 2 {
		panic("setting: invalid")
	}
	return os.Setenv(s[0], s[1])
}

// MemoryGetUsage memory_get_usage()
// return in bytes
func MemoryGetUsage(realUsage bool) uint64 {
	stat := new(runtime.MemStats)
	runtime.ReadMemStats(stat)
	return stat.Alloc
}

// VersionCompare version_compare()
// The possible operators are: <, lt, <=, le, >, gt, >=, ge, ==, =, eq, !=, <>, ne respectively.
// special version strings these are handled in the following order,
// (any string not found) < dev < alpha = a < beta = b < RC = rc < # < pl = p
// Usage:
// VersionCompare("1.2.3-alpha", "1.2.3RC7", '>=')
// VersionCompare("1.2.3-beta", "1.2.3pl", 'lt')
// VersionCompare("1.1_dev", "1.2any", 'eq')
func VersionCompare(version1, version2, operator string) bool {
	var vcompare func(string, string) int
	var canonicalize func(string) string
	var special func(string, string) int

	// version compare
	vcompare = func(origV1, origV2 string) int {
		if origV1 == "" || origV2 == "" {
			if origV1 == "" && origV2 == "" {
				return 0
			}
			if origV1 == "" {
				return -1
			}
			return 1
		}

		ver1, ver2, compare := "", "", 0
		if origV1[0] == '#' {
			ver1 = origV1
		} else {
			ver1 = canonicalize(origV1)
		}
		if origV2[0] == '#' {
			ver2 = origV2
		} else {
			ver2 = canonicalize(origV2)
		}
		n1, n2 := 0, 0
		for {
			p1, p2 := "", ""
			n1 = strings.IndexByte(ver1, '.')
			if n1 == -1 {
				p1, ver1 = ver1[:], ""
			} else {
				p1, ver1 = ver1[:n1], ver1[n1+1:]
			}
			n2 = strings.IndexByte(ver2, '.')
			if n2 == -1 {
				p2, ver2 = ver2, ""
			} else {
				p2, ver2 = ver2[:n2], ver2[n2+1:]
			}

			if (p1[0] >= '0' && p1[0] <= '9') && (p2[0] >= '0' && p2[0] <= '9') { // all is digit
				l1, _ := strconv.Atoi(p1)
				l2, _ := strconv.Atoi(p2)
				if l1 > l2 {
					compare = 1
				} else if l1 == l2 {
					compare = 0
				} else {
					compare = -1
				}
			} else if !(p1[0] >= '0' && p1[0] <= '9') && !(p2[0] >= '0' && p2[0] <= '9') { // all digit
				compare = special(p1, p2)
			} else { // part is digit
				if p1[0] >= '0' && p1[0] <= '9' { // is digit
					compare = special("#N#", p2)
				} else {
					compare = special(p1, "#N#")
				}
			}

			if compare != 0 || n1 == -1 || n2 == -1 {
				break
			}
		}

		if compare == 0 {
			if ver1 != "" {
				if ver1[0] >= '0' && ver1[0] <= '9' {
					compare = 1
				} else {
					compare = vcompare(ver1, "#N#")
				}
			} else if ver2 != "" {
				if ver2[0] >= '0' && ver2[0] <= '9' {
					compare = -1
				} else {
					compare = vcompare("#N#", ver2)
				}
			}
		}

		return compare
	}

	// canonicalize
	canonicalize = func(version string) string {
		ver := []byte(version)
		l := len(ver)
		if l == 0 {
			return ""
		}
		var buf = make([]byte, l*2)
		j := 0
		for i, v := range ver {
			next := uint8(0)
			if i+1 < l { // Have the next one
				next = ver[i+1]
			}
			if v == '-' || v == '_' || v == '+' { // replace '-', '_', '+' to '.'
				if j > 0 && buf[j-1] != '.' {
					buf[j] = '.'
					j++
				}
			} else if (next > 0) &&
				(!(next >= '0' && next <= '9') && (v >= '0' && v <= '9')) ||
				(!(v >= '0' && v <= '9') && (next >= '0' && next <= '9')) { // Insert '.' before and after a non-digit
				buf[j] = v
				j++
				if v != '.' && next != '.' {
					buf[j] = '.'
					j++
				}
				continue
			} else if !((v >= '0' && v <= '9') ||
				(v >= 'a' && v <= 'z') || (v >= 'A' && v <= 'Z')) { // Non-letters and numbers
				if j > 0 && buf[j-1] != '.' {
					buf[j] = '.'
					j++
				}
			} else {
				buf[j] = v
				j++
			}
		}

		return string(buf[:j])
	}

	// compare special version forms
	special = func(form1, form2 string) int {
		found1, found2, len1, len2 := -1, -1, len(form1), len(form2)
		// (Any string not found) < dev < alpha = a < beta = b < RC = rc < # < pl = p
		forms := map[string]int{
			"dev":   0,
			"alpha": 1,
			"a":     1,
			"beta":  2,
			"b":     2,
			"RC":    3,
			"rc":    3,
			"#":     4,
			"pl":    5,
			"p":     5,
		}

		for name, order := range forms {
			if len1 < len(name) {
				continue
			}
			if strings.Compare(form1[:len(name)], name) == 0 {
				found1 = order
				break
			}
		}
		for name, order := range forms {
			if len2 < len(name) {
				continue
			}
			if strings.Compare(form2[:len(name)], name) == 0 {
				found2 = order
				break
			}
		}

		if found1 == found2 {
			return 0
		} else if found1 > found2 {
			return 1
		} else {
			return -1
		}
	}

	compare := vcompare(version1, version2)

	switch operator {
	case "<", "lt":
		return compare == -1
	case "<=", "le":
		return compare != 1
	case ">", "gt":
		return compare == 1
	case ">=", "ge":
		return compare != -1
	case "==", "=", "eq":
		return compare == 0
	case "!=", "<>", "ne":
		return compare != 0
	default:
		panic("operator: invalid")
	}
}

// ZipOpen zip_open()
func ZipOpen(filename string) (*zip.ReadCloser, error) {
	return zip.OpenReader(filename)
}

// Pack pack()
func Pack(order binary.ByteOrder, data interface{}) (string, error) {
	buf := new(bytes.Buffer)
	err := binary.Write(buf, order, data)
	if err != nil {
		return "", err
	}

	return buf.String(), nil
}

// Unpack unpack()
func Unpack(order binary.ByteOrder, data string) (interface{}, error) {
	var result []byte
	r := bytes.NewReader([]byte(data))
	err := binary.Read(r, order, &result)
	if err != nil {
		return nil, err
	}

	return result, nil
}

// Ternary Ternary expression
// max := Ternary(a > b, a, b).(int)
func Ternary(condition bool, trueVal, falseVal interface{}) interface{} {
	if condition {
		return trueVal
	}
	return falseVal
}

//StrToInt 字符串换数字
func StrToInt(str string, val int) int {
	num, err := strconv.Atoi(str)
	if err != nil {
		return val
	}
	return num
}

func StrToInt64(str string, val int64) int64 {
	num, err := strconv.ParseInt(str, 10, 64)
	if err != nil {
		return val
	}
	return num
}

func UnixTimeFormatDate(str interface{}) string {
	return Date("Y-m-d H:i:s", ToTime(ToInt64(str)))
}

//ZhCharToFirstPinyin 将中文转换成小写字母
func ZhCharToFirstPinyin(p string) string {
	var a = pinyin.NewArgs()
	var s string
	a.Style = pinyin.FirstLetter
	for _, r := range p {
		if unicode.Is(unicode.Han, r) {
			s += string(pinyin.Pinyin(string(r), a)[0][0])
		} else if unicode.IsNumber(r) || unicode.IsLetter(r) {
			s += string(r)
		}
	}
	return StrToLower(s)
}

func InterfaceToString(data []interface{}) (s []string) {
	for _, v := range data {
		s = append(s, fmt.Sprintf("%v", v))
	}
	return s
}

//分割字符串 p 字符串, split 分隔符 , space 是否需要保留文字中的空格
func SplitString(p, split string, space bool) string {
	var res string
	for _, c := range p {
		if unicode.IsPunct(c) || unicode.IsSymbol(c) {
			res += string(split)
		} else {
			//如果不保留空格空格
			if !space {
				if unicode.IsSpace(c) {
					continue
				} else {
					res += string(c)
				}
			} else {
				res += string(c)
			}
		}
	}
	reg := regexp.MustCompile(`\/{2,}`)
	res = reg.ReplaceAllString(res, split)
	args := Explode(split, res)
	newAry := make(map[string]string, 0)
	newArys := make(map[interface{}]interface{}, 0)
	for _, v := range args {
		if len(StrTrim(v)) > 0 {
			newAry[StrTrim(v)] = StrTrim(v)
		}
	}
	for _, v := range newAry {
		newArys[v] = v
	}
	data := InterfaceToString(ArrayValues(newArys))
	return Implode(split, data)
}

func ArrayPluck(data []map[string]string, value string) []string {
	res := make([]string, 0)
	for _, v := range data {
		res = append(res, v[value])
	}
	return res
}

func ArrayKeyPluck(data []map[string]string, value, key string) map[string]string {
	res := make(map[string]string, 0)
	for _, v := range data {
		res[v[key]] = v[value]
	}
	return res
}

// jsonStringToObject attempts to unmarshall a string as JSON into
// the object passed as pointer.
func jsonStringToObject(s string, v interface{}) error {
	data := []byte(s)
	return json.Unmarshal(data, v)
}

// ToTimeE casts an interface to a time.Time type.
func ToTimeE(i interface{}) (tim time.Time, err error) {
	i = indirect(i)

	cstZone := GetTimeZone()

	switch v := i.(type) {
	case time.Time:
		return v, nil
	case string:
		return StringToDate(v)
	case int:
		return time.Unix(int64(v), 0).In(cstZone), nil
	case int64:
		return time.Unix(v, 0).In(cstZone), nil
	case int32:
		return time.Unix(int64(v), 0).In(cstZone), nil
	case uint:
		return time.Unix(int64(v), 0).In(cstZone), nil
	case uint64:
		return time.Unix(int64(v), 0).In(cstZone), nil
	case uint32:
		return time.Unix(int64(v), 0).In(cstZone), nil
	default:
		return time.Time{}, fmt.Errorf("unable to cast %#v of type %T to Time", i, i)
	}
}

// ToDurationE casts an interface to a time.Duration type.
func ToDurationE(i interface{}) (d time.Duration, err error) {
	i = indirect(i)

	switch s := i.(type) {
	case time.Duration:
		return s, nil
	case int, int64, int32, int16, int8, uint, uint64, uint32, uint16, uint8:
		d = time.Duration(ToInt64(s))
		return
	case float32, float64:
		d = time.Duration(ToFloat64(s))
		return
	case string:
		if strings.ContainsAny(s, "nsuµmh") {
			d, err = time.ParseDuration(s)
		} else {
			d, err = time.ParseDuration(s + "ns")
		}
		return
	default:
		err = fmt.Errorf("unable to cast %#v of type %T to Duration", i, i)
		return
	}
}

// ToBoolE casts an interface to a bool type.
func ToBoolE(i interface{}) (bool, error) {
	i = indirect(i)

	switch b := i.(type) {
	case bool:
		return b, nil
	case nil:
		return false, nil
	case int:
		if i.(int) != 0 {
			return true, nil
		}
		return false, nil
	case string:
		return strconv.ParseBool(i.(string))
	default:
		return false, fmt.Errorf("unable to cast %#v of type %T to bool", i, i)
	}
}

// ToFloat64E casts an interface to a float64 type.
func ToFloat64E(i interface{}) (float64, error) {
	i = indirect(i)

	switch s := i.(type) {
	case float64:
		return s, nil
	case float32:
		return float64(s), nil
	case int:
		return float64(s), nil
	case int64:
		return float64(s), nil
	case int32:
		return float64(s), nil
	case int16:
		return float64(s), nil
	case int8:
		return float64(s), nil
	case uint:
		return float64(s), nil
	case uint64:
		return float64(s), nil
	case uint32:
		return float64(s), nil
	case uint16:
		return float64(s), nil
	case uint8:
		return float64(s), nil
	case string:
		v, err := strconv.ParseFloat(s, 64)
		if err == nil {
			return v, nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to float64", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to float64", i, i)
	}
}

// ToFloat32E casts an interface to a float32 type.
func ToFloat32E(i interface{}) (float32, error) {
	i = indirect(i)

	switch s := i.(type) {
	case float64:
		return float32(s), nil
	case float32:
		return s, nil
	case int:
		return float32(s), nil
	case int64:
		return float32(s), nil
	case int32:
		return float32(s), nil
	case int16:
		return float32(s), nil
	case int8:
		return float32(s), nil
	case uint:
		return float32(s), nil
	case uint64:
		return float32(s), nil
	case uint32:
		return float32(s), nil
	case uint16:
		return float32(s), nil
	case uint8:
		return float32(s), nil
	case string:
		v, err := strconv.ParseFloat(s, 32)
		if err == nil {
			return float32(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to float32", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to float32", i, i)
	}
}

// ToInt64E casts an interface to an int64 type.
func ToInt64E(i interface{}) (int64, error) {
	i = indirect(i)

	switch s := i.(type) {
	case int:
		return int64(s), nil
	case int64:
		return s, nil
	case int32:
		return int64(s), nil
	case int16:
		return int64(s), nil
	case int8:
		return int64(s), nil
	case uint:
		return int64(s), nil
	case uint64:
		return int64(s), nil
	case uint32:
		return int64(s), nil
	case uint16:
		return int64(s), nil
	case uint8:
		return int64(s), nil
	case float64:
		return int64(s), nil
	case float32:
		return int64(s), nil
	case string:
		v, err := strconv.ParseInt(s, 0, 0)
		if err == nil {
			return v, nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to int64", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to int64", i, i)
	}
}

// ToInt32E casts an interface to an int32 type.
func ToInt32E(i interface{}) (int32, error) {
	i = indirect(i)

	switch s := i.(type) {
	case int:
		return int32(s), nil
	case int64:
		return int32(s), nil
	case int32:
		return s, nil
	case int16:
		return int32(s), nil
	case int8:
		return int32(s), nil
	case uint:
		return int32(s), nil
	case uint64:
		return int32(s), nil
	case uint32:
		return int32(s), nil
	case uint16:
		return int32(s), nil
	case uint8:
		return int32(s), nil
	case float64:
		return int32(s), nil
	case float32:
		return int32(s), nil
	case string:
		v, err := strconv.ParseInt(s, 0, 0)
		if err == nil {
			return int32(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to int32", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to int32", i, i)
	}
}

// ToInt16E casts an interface to an int16 type.
func ToInt16E(i interface{}) (int16, error) {
	i = indirect(i)

	switch s := i.(type) {
	case int:
		return int16(s), nil
	case int64:
		return int16(s), nil
	case int32:
		return int16(s), nil
	case int16:
		return s, nil
	case int8:
		return int16(s), nil
	case uint:
		return int16(s), nil
	case uint64:
		return int16(s), nil
	case uint32:
		return int16(s), nil
	case uint16:
		return int16(s), nil
	case uint8:
		return int16(s), nil
	case float64:
		return int16(s), nil
	case float32:
		return int16(s), nil
	case string:
		v, err := strconv.ParseInt(s, 0, 0)
		if err == nil {
			return int16(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to int16", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to int16", i, i)
	}
}

// ToInt8E casts an interface to an int8 type.
func ToInt8E(i interface{}) (int8, error) {
	i = indirect(i)

	switch s := i.(type) {
	case int:
		return int8(s), nil
	case int64:
		return int8(s), nil
	case int32:
		return int8(s), nil
	case int16:
		return int8(s), nil
	case int8:
		return s, nil
	case uint:
		return int8(s), nil
	case uint64:
		return int8(s), nil
	case uint32:
		return int8(s), nil
	case uint16:
		return int8(s), nil
	case uint8:
		return int8(s), nil
	case float64:
		return int8(s), nil
	case float32:
		return int8(s), nil
	case string:
		v, err := strconv.ParseInt(s, 0, 0)
		if err == nil {
			return int8(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to int8", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to int8", i, i)
	}
}

// ToIntE casts an interface to an int type.
func ToIntE(i interface{}) (int, error) {
	i = indirect(i)

	switch s := i.(type) {
	case int:
		return s, nil
	case int64:
		return int(s), nil
	case int32:
		return int(s), nil
	case int16:
		return int(s), nil
	case int8:
		return int(s), nil
	case uint:
		return int(s), nil
	case uint64:
		return int(s), nil
	case uint32:
		return int(s), nil
	case uint16:
		return int(s), nil
	case uint8:
		return int(s), nil
	case float64:
		return int(s), nil
	case float32:
		return int(s), nil
	case string:
		v, err := strconv.ParseInt(s, 0, 0)
		if err == nil {
			return int(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v of type %T to int", i, i)
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to int", i, i)
	}
}

// ToUintE casts an interface to a uint type.
func ToUintE(i interface{}) (uint, error) {
	i = indirect(i)

	switch s := i.(type) {
	case string:
		v, err := strconv.ParseUint(s, 0, 0)
		if err == nil {
			return uint(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v to uint: %s", i, err)
	case int:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case int64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case int32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case int16:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case int8:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case uint:
		return s, nil
	case uint64:
		return uint(s), nil
	case uint32:
		return uint(s), nil
	case uint16:
		return uint(s), nil
	case uint8:
		return uint(s), nil
	case float64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case float32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint(s), nil
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to uint", i, i)
	}
}

// ToUint64E casts an interface to a uint64 type.
func ToUint64E(i interface{}) (uint64, error) {
	i = indirect(i)

	switch s := i.(type) {
	case string:
		v, err := strconv.ParseUint(s, 0, 64)
		if err == nil {
			return v, nil
		}
		return 0, fmt.Errorf("unable to cast %#v to uint64: %s", i, err)
	case int:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case int64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case int32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case int16:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case int8:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case uint:
		return uint64(s), nil
	case uint64:
		return s, nil
	case uint32:
		return uint64(s), nil
	case uint16:
		return uint64(s), nil
	case uint8:
		return uint64(s), nil
	case float32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case float64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint64(s), nil
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to uint64", i, i)
	}
}

// ToUint32E casts an interface to a uint32 type.
func ToUint32E(i interface{}) (uint32, error) {
	i = indirect(i)

	switch s := i.(type) {
	case string:
		v, err := strconv.ParseUint(s, 0, 32)
		if err == nil {
			return uint32(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v to uint32: %s", i, err)
	case int:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case int64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case int32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case int16:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case int8:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case uint:
		return uint32(s), nil
	case uint64:
		return uint32(s), nil
	case uint32:
		return s, nil
	case uint16:
		return uint32(s), nil
	case uint8:
		return uint32(s), nil
	case float64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case float32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint32(s), nil
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to uint32", i, i)
	}
}

// ToUint16E casts an interface to a uint16 type.
func ToUint16E(i interface{}) (uint16, error) {
	i = indirect(i)

	switch s := i.(type) {
	case string:
		v, err := strconv.ParseUint(s, 0, 16)
		if err == nil {
			return uint16(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v to uint16: %s", i, err)
	case int:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case int64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case int32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case int16:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case int8:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case uint:
		return uint16(s), nil
	case uint64:
		return uint16(s), nil
	case uint32:
		return uint16(s), nil
	case uint16:
		return s, nil
	case uint8:
		return uint16(s), nil
	case float64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case float32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint16(s), nil
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to uint16", i, i)
	}
}

// ToUint8E casts an interface to a uint type.
func ToUint8E(i interface{}) (uint8, error) {
	i = indirect(i)

	switch s := i.(type) {
	case string:
		v, err := strconv.ParseUint(s, 0, 8)
		if err == nil {
			return uint8(v), nil
		}
		return 0, fmt.Errorf("unable to cast %#v to uint8: %s", i, err)
	case int:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case int64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case int32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case int16:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case int8:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case uint:
		return uint8(s), nil
	case uint64:
		return uint8(s), nil
	case uint32:
		return uint8(s), nil
	case uint16:
		return uint8(s), nil
	case uint8:
		return s, nil
	case float64:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case float32:
		if s < 0 {
			return 0, errNegativeNotAllowed
		}
		return uint8(s), nil
	case bool:
		if s {
			return 1, nil
		}
		return 0, nil
	case nil:
		return 0, nil
	default:
		return 0, fmt.Errorf("unable to cast %#v of type %T to uint8", i, i)
	}
}

// From html/template/content.go
// Copyright 2011 The Go Authors. All rights reserved.
// indirect returns the value, after dereferencing as many times
// as necessary to reach the base type (or nil).
func indirect(a interface{}) interface{} {
	if a == nil {
		return nil
	}
	if t := reflect.TypeOf(a); t.Kind() != reflect.Ptr {
		// Avoid creating a reflect.Value if it's not a pointer.
		return a
	}
	v := reflect.ValueOf(a)
	for v.Kind() == reflect.Ptr && !v.IsNil() {
		v = v.Elem()
	}
	return v.Interface()
}

// From html/template/content.go
// Copyright 2011 The Go Authors. All rights reserved.
// indirectToStringerOrError returns the value, after dereferencing as many times
// as necessary to reach the base type (or nil) or an implementation of fmt.Stringer
// or error,
func indirectToStringerOrError(a interface{}) interface{} {
	if a == nil {
		return nil
	}

	var errorType = reflect.TypeOf((*error)(nil)).Elem()
	var fmtStringerType = reflect.TypeOf((*fmt.Stringer)(nil)).Elem()

	v := reflect.ValueOf(a)
	for !v.Type().Implements(fmtStringerType) && !v.Type().Implements(errorType) && v.Kind() == reflect.Ptr && !v.IsNil() {
		v = v.Elem()
	}
	return v.Interface()
}

// ToStringE casts an interface to a string type.
func ToStringE(i interface{}) (string, error) {
	i = indirectToStringerOrError(i)

	switch s := i.(type) {
	case string:
		return s, nil
	case bool:
		return strconv.FormatBool(s), nil
	case float64:
		return strconv.FormatFloat(s, 'f', -1, 64), nil
	case float32:
		return strconv.FormatFloat(float64(s), 'f', -1, 32), nil
	case int:
		return strconv.Itoa(s), nil
	case int64:
		return strconv.FormatInt(s, 10), nil
	case int32:
		return strconv.Itoa(int(s)), nil
	case int16:
		return strconv.FormatInt(int64(s), 10), nil
	case int8:
		return strconv.FormatInt(int64(s), 10), nil
	case uint:
		return strconv.FormatUint(uint64(s), 10), nil
	case uint64:
		return strconv.FormatUint(uint64(s), 10), nil
	case uint32:
		return strconv.FormatUint(uint64(s), 10), nil
	case uint16:
		return strconv.FormatUint(uint64(s), 10), nil
	case uint8:
		return strconv.FormatUint(uint64(s), 10), nil
	case []byte:
		return string(s), nil
	case template.HTML:
		return string(s), nil
	case template.URL:
		return string(s), nil
	case template.JS:
		return string(s), nil
	case template.CSS:
		return string(s), nil
	case template.HTMLAttr:
		return string(s), nil
	case nil:
		return "", nil
	case fmt.Stringer:
		return s.String(), nil
	case error:
		return s.Error(), nil
	default:
		return "", fmt.Errorf("unable to cast %#v of type %T to string", i, i)
	}
}

// ToStringMapStringE casts an interface to a map[string]string type.
func ToStringMapStringE(i interface{}) (map[string]string, error) {
	var m = map[string]string{}

	switch v := i.(type) {
	case map[string]string:
		return v, nil
	case map[string]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToString(val)
		}
		return m, nil
	case map[interface{}]string:
		for k, val := range v {
			m[ToString(k)] = ToString(val)
		}
		return m, nil
	case map[interface{}]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToString(val)
		}
		return m, nil
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	default:
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]string", i, i)
	}
}

// ToStringMapStringSliceE casts an interface to a map[string][]string type.
func ToStringMapStringSliceE(i interface{}) (map[string][]string, error) {
	var m = map[string][]string{}

	switch v := i.(type) {
	case map[string][]string:
		return v, nil
	case map[string][]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToStringSlice(val)
		}
		return m, nil
	case map[string]string:
		for k, val := range v {
			m[ToString(k)] = []string{val}
		}
	case map[string]interface{}:
		for k, val := range v {
			switch vt := val.(type) {
			case []interface{}:
				m[ToString(k)] = ToStringSlice(vt)
			case []string:
				m[ToString(k)] = vt
			default:
				m[ToString(k)] = []string{ToString(val)}
			}
		}
		return m, nil
	case map[interface{}][]string:
		for k, val := range v {
			m[ToString(k)] = ToStringSlice(val)
		}
		return m, nil
	case map[interface{}]string:
		for k, val := range v {
			m[ToString(k)] = ToStringSlice(val)
		}
		return m, nil
	case map[interface{}][]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToStringSlice(val)
		}
		return m, nil
	case map[interface{}]interface{}:
		for k, val := range v {
			key, err := ToStringE(k)
			if err != nil {
				return m, fmt.Errorf("unable to cast %#v of type %T to map[string][]string", i, i)
			}
			value, err := ToStringSliceE(val)
			if err != nil {
				return m, fmt.Errorf("unable to cast %#v of type %T to map[string][]string", i, i)
			}
			m[key] = value
		}
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	default:
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string][]string", i, i)
	}
	return m, nil
}

// ToStringMapBoolE casts an interface to a map[string]bool type.
func ToStringMapBoolE(i interface{}) (map[string]bool, error) {
	var m = map[string]bool{}

	switch v := i.(type) {
	case map[interface{}]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToBool(val)
		}
		return m, nil
	case map[string]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToBool(val)
		}
		return m, nil
	case map[string]bool:
		return v, nil
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	default:
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]bool", i, i)
	}
}

// ToStringMapE casts an interface to a map[string]interface{} type.
func ToStringMapE(i interface{}) (map[string]interface{}, error) {
	var m = map[string]interface{}{}

	switch v := i.(type) {
	case map[interface{}]interface{}:
		for k, val := range v {
			m[ToString(k)] = val
		}
		return m, nil
	case map[string]interface{}:
		return v, nil
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	default:
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]interface{}", i, i)
	}
}

// ToStringMapIntE casts an interface to a map[string]int{} type.
func ToStringMapIntE(i interface{}) (map[string]int, error) {
	var m = map[string]int{}
	if i == nil {
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
	}

	switch v := i.(type) {
	case map[interface{}]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToInt(val)
		}
		return m, nil
	case map[string]interface{}:
		for k, val := range v {
			m[k] = ToInt(val)
		}
		return m, nil
	case map[string]int:
		return v, nil
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	}

	if reflect.TypeOf(i).Kind() != reflect.Map {
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
	}

	mVal := reflect.ValueOf(m)
	v := reflect.ValueOf(i)
	for _, keyVal := range v.MapKeys() {
		val, err := ToIntE(v.MapIndex(keyVal).Interface())
		if err != nil {
			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int", i, i)
		}
		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
	}
	return m, nil
}

// ToStringMapInt64E casts an interface to a map[string]int64{} type.
func ToStringMapInt64E(i interface{}) (map[string]int64, error) {
	var m = map[string]int64{}
	if i == nil {
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
	}

	switch v := i.(type) {
	case map[interface{}]interface{}:
		for k, val := range v {
			m[ToString(k)] = ToInt64(val)
		}
		return m, nil
	case map[string]interface{}:
		for k, val := range v {
			m[k] = ToInt64(val)
		}
		return m, nil
	case map[string]int64:
		return v, nil
	case string:
		err := jsonStringToObject(v, &m)
		return m, err
	}

	if reflect.TypeOf(i).Kind() != reflect.Map {
		return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
	}
	mVal := reflect.ValueOf(m)
	v := reflect.ValueOf(i)
	for _, keyVal := range v.MapKeys() {
		val, err := ToInt64E(v.MapIndex(keyVal).Interface())
		if err != nil {
			return m, fmt.Errorf("unable to cast %#v of type %T to map[string]int64", i, i)
		}
		mVal.SetMapIndex(keyVal, reflect.ValueOf(val))
	}
	return m, nil
}

// ToSliceE casts an interface to a []interface{} type.
func ToSliceE(i interface{}) ([]interface{}, error) {
	var s []interface{}

	switch v := i.(type) {
	case []interface{}:
		return append(s, v...), nil
	case []map[string]interface{}:
		for _, u := range v {
			s = append(s, u)
		}
		return s, nil
	default:
		return s, fmt.Errorf("unable to cast %#v of type %T to []interface{}", i, i)
	}
}

// ToBoolSliceE casts an interface to a []bool type.
func ToBoolSliceE(i interface{}) ([]bool, error) {
	if i == nil {
		return []bool{}, fmt.Errorf("unable to cast %#v of type %T to []bool", i, i)
	}

	switch v := i.(type) {
	case []bool:
		return v, nil
	}

	kind := reflect.TypeOf(i).Kind()
	switch kind {
	case reflect.Slice, reflect.Array:
		s := reflect.ValueOf(i)
		a := make([]bool, s.Len())
		for j := 0; j < s.Len(); j++ {
			val, err := ToBoolE(s.Index(j).Interface())
			if err != nil {
				return []bool{}, fmt.Errorf("unable to cast %#v of type %T to []bool", i, i)
			}
			a[j] = val
		}
		return a, nil
	default:
		return []bool{}, fmt.Errorf("unable to cast %#v of type %T to []bool", i, i)
	}
}

// ToStringSliceE casts an interface to a []string type.
func ToStringSliceE(i interface{}) ([]string, error) {
	var a []string

	switch v := i.(type) {
	case []interface{}:
		for _, u := range v {
			a = append(a, ToString(u))
		}
		return a, nil
	case []string:
		return v, nil
	case string:
		return strings.Fields(v), nil
	case interface{}:
		str, err := ToStringE(v)
		if err != nil {
			return a, fmt.Errorf("unable to cast %#v of type %T to []string", i, i)
		}
		return []string{str}, nil
	default:
		return a, fmt.Errorf("unable to cast %#v of type %T to []string", i, i)
	}
}

// ToIntSliceE casts an interface to a []int type.
func ToIntSliceE(i interface{}) ([]int, error) {
	if i == nil {
		return []int{}, fmt.Errorf("unable to cast %#v of type %T to []int", i, i)
	}

	switch v := i.(type) {
	case []int:
		return v, nil
	}

	kind := reflect.TypeOf(i).Kind()
	switch kind {
	case reflect.Slice, reflect.Array:
		s := reflect.ValueOf(i)
		a := make([]int, s.Len())
		for j := 0; j < s.Len(); j++ {
			val, err := ToIntE(s.Index(j).Interface())
			if err != nil {
				return []int{}, fmt.Errorf("unable to cast %#v of type %T to []int", i, i)
			}
			a[j] = val
		}
		return a, nil
	default:
		return []int{}, fmt.Errorf("unable to cast %#v of type %T to []int", i, i)
	}
}

// ToDurationSliceE casts an interface to a []time.Duration type.
func ToDurationSliceE(i interface{}) ([]time.Duration, error) {
	if i == nil {
		return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
	}

	switch v := i.(type) {
	case []time.Duration:
		return v, nil
	}

	kind := reflect.TypeOf(i).Kind()
	switch kind {
	case reflect.Slice, reflect.Array:
		s := reflect.ValueOf(i)
		a := make([]time.Duration, s.Len())
		for j := 0; j < s.Len(); j++ {
			val, err := ToDurationE(s.Index(j).Interface())
			if err != nil {
				return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
			}
			a[j] = val
		}
		return a, nil
	default:
		return []time.Duration{}, fmt.Errorf("unable to cast %#v of type %T to []time.Duration", i, i)
	}
}

// StringToDate attempts to parse a string into a time.Time type using a
// predefined list of formats.  If no suitable format is found, an error is
// returned.
func StringToDate(s string) (time.Time, error) {
	return parseDateWith(s, []string{
		time.RFC3339,
		"2006-01-02T15:04:05", // iso8601 without timezone
		time.RFC1123Z,
		time.RFC1123,
		time.RFC822Z,
		time.RFC822,
		time.RFC850,
		time.ANSIC,
		time.UnixDate,
		time.RubyDate,
		"2006-01-02 15:04:05.999999999 -0700 MST", // Time.String()
		"2006-01-02",
		"02 Jan 2006",
		"2006-01-02T15:04:05-0700", // RFC3339 without timezone hh:mm colon
		"2006-01-02 15:04:05 -07:00",
		"2006-01-02 15:04:05 -0700",
		"2006-01-02 15:04:05Z07:00", // RFC3339 without T
		"2006-01-02 15:04:05Z0700",  // RFC3339 without T or timezone hh:mm colon
		"2006-01-02 15:04:05",
		time.Kitchen,
		time.Stamp,
		time.StampMilli,
		time.StampMicro,
		time.StampNano,
	})
}

// func parseDateWith(s string, dates []string) (d time.Time, e error) {
// 	for _, dateType := range dates {
// 		if d, e = time.Parse(dateType, s); e == nil {
// 			return
// 		}
// 	}
// 	return d, fmt.Errorf("unable to parse date: %s", s)
// }

func parseDateWith(s string, dates []string) (d time.Time, e error) {
	cstZone := GetTimeZone()
	for _, dateType := range dates {
		if d, e = time.ParseInLocation(dateType, s, cstZone); e == nil {
			return
		}
	}
	return d, fmt.Errorf("unable to parse date: %s", s)
}

// ToBool casts an interface to a bool type.
func ToBool(i interface{}) bool {
	v, _ := ToBoolE(i)
	return v
}

// ToTime casts an interface to a time.Time type.
func ToTime(i interface{}) time.Time {
	v, _ := ToTimeE(i)
	return v
}

// ToDuration casts an interface to a time.Duration type.
func ToDuration(i interface{}) time.Duration {
	v, _ := ToDurationE(i)
	return v
}

// ToFloat64 casts an interface to a float64 type.
func ToFloat64(i interface{}) float64 {
	v, _ := ToFloat64E(i)
	return v
}

// ToFloat32 casts an interface to a float32 type.
func ToFloat32(i interface{}) float32 {
	v, _ := ToFloat32E(i)
	return v
}

// ToInt64 casts an interface to an int64 type.
func ToInt64(i interface{}) int64 {
	v, _ := ToInt64E(i)
	return v
}

// ToInt32 casts an interface to an int32 type.
func ToInt32(i interface{}) int32 {
	v, _ := ToInt32E(i)
	return v
}

// ToInt16 casts an interface to an int16 type.
func ToInt16(i interface{}) int16 {
	v, _ := ToInt16E(i)
	return v
}

// ToInt8 casts an interface to an int8 type.
func ToInt8(i interface{}) int8 {
	v, _ := ToInt8E(i)
	return v
}

// ToInt casts an interface to an int type.
func ToInt(i interface{}) int {
	v, _ := ToIntE(i)
	return v
}

// ToUint casts an interface to a uint type.
func ToUint(i interface{}) uint {
	v, _ := ToUintE(i)
	return v
}

// ToUint64 casts an interface to a uint64 type.
func ToUint64(i interface{}) uint64 {
	v, _ := ToUint64E(i)
	return v
}

// ToUint32 casts an interface to a uint32 type.
func ToUint32(i interface{}) uint32 {
	v, _ := ToUint32E(i)
	return v
}

// ToUint16 casts an interface to a uint16 type.
func ToUint16(i interface{}) uint16 {
	v, _ := ToUint16E(i)
	return v
}

// ToUint8 casts an interface to a uint8 type.
func ToUint8(i interface{}) uint8 {
	v, _ := ToUint8E(i)
	return v
}

// ToString casts an interface to a string type.
func ToString(i interface{}) string {
	v, _ := ToStringE(i)
	return v
}

// ToStringMapString casts an interface to a map[string]string type.
func ToStringMapString(i interface{}) map[string]string {
	v, _ := ToStringMapStringE(i)
	return v
}

// ToStringMapStringSlice casts an interface to a map[string][]string type.
func ToStringMapStringSlice(i interface{}) map[string][]string {
	v, _ := ToStringMapStringSliceE(i)
	return v
}

// ToStringMapBool casts an interface to a map[string]bool type.
func ToStringMapBool(i interface{}) map[string]bool {
	v, _ := ToStringMapBoolE(i)
	return v
}

// ToStringMapInt casts an interface to a map[string]int type.
func ToStringMapInt(i interface{}) map[string]int {
	v, _ := ToStringMapIntE(i)
	return v
}

// ToStringMapInt64 casts an interface to a map[string]int64 type.
func ToStringMapInt64(i interface{}) map[string]int64 {
	v, _ := ToStringMapInt64E(i)
	return v
}

// ToStringMap casts an interface to a map[string]interface{} type.
func ToStringMap(i interface{}) map[string]interface{} {
	v, _ := ToStringMapE(i)
	return v
}

// ToSlice casts an interface to a []interface{} type.
func ToSlice(i interface{}) []interface{} {
	v, _ := ToSliceE(i)
	return v
}

// ToBoolSlice casts an interface to a []bool type.
func ToBoolSlice(i interface{}) []bool {
	v, _ := ToBoolSliceE(i)
	return v
}

// ToStringSlice casts an interface to a []string type.
func ToStringSlice(i interface{}) []string {
	v, _ := ToStringSliceE(i)
	return v
}

// ToIntSlice casts an interface to a []int type.
func ToIntSlice(i interface{}) []int {
	v, _ := ToIntSliceE(i)
	return v
}

// ToDurationSlice casts an interface to a []time.Duration type.
func ToDurationSlice(i interface{}) []time.Duration {
	v, _ := ToDurationSliceE(i)
	return v
}

func AryMapStringToAryMapInterface(d []map[string]string) []map[string]interface{} {
	data := make([]map[string]interface{}, 0)
	for _, v := range d {
		data = append(data, MapStringToMapInterface(v))
	}
	return data
}

func MapStringToMapInterface(d map[string]string) map[string]interface{} {
	data := make(map[string]interface{}, 0)

	for k, v := range d {
		data[k] = interface{}(v)
	}
	return data
}

func AryMapInterfaceToAryMapString(d []map[string]interface{}) []map[string]string {
	data := make([]map[string]string, 0)
	for _, v := range d {
		data = append(data, MapInterfaceToMapString(v))
	}
	return data
}

func MapInterfaceToMapString(d map[string]interface{}) map[string]string {
	data := make(map[string]string, 0)

	for k, v := range d {
		data[k] = ToString(v)
	}
	return data
}

func ArgStringToAryInterface(d []string) []interface{} {
	data := make([]interface{}, 0)
	for _, v := range d {
		data = append(data, interface{}(v))
	}
	return data
}

func AryInterfaceToArgString(d []interface{}) []string {
	data := make([]string, 0)
	for _, v := range d {
		data = append(data, ToString(v))
	}
	return data
}

//查询是否被整除
func Divide(m, n interface{}) bool {
	r := math.Mod(ToFloat64(m), ToFloat64(n))
	if r == 0 {
		return true
	}
	return false
}

func Add(m, n interface{}) int {
	return ToInt(m) + ToInt(n)
}

// ordinalInYear returns the ordinal (within a year) day number.
func ordinalInYear(year int, month time.Month, day int) (dayNo int) {
	return DateToJulian(year, month, day) - DateToJulian(year, 1, 1) + 1
}

// ISOWeekday returns the ISO 8601 weekday number of given day.
// (1 = Mon, 2 = Tue,.. 7 = Sun)
//
// This is different from Go's standard time.Weekday.
func ISOWeekday(year int, month time.Month, day int) (weekday int) {
	// Richards, E. G. (2013) pp. 592, 618

	return DateToJulian(year, month, day)%7 + 1
}

// DateToJulian converts a date to a Julian day number.
func DateToJulian(year int, month time.Month, day int) (dayNo int) {
	// Claus Tøndering's Calendar FAQ
	// http://www.tondering.dk/claus/cal/julperiod.php#formula

	if month < 3 {
		year = year - 1
		month = month + 12
	}
	year = year + 4800

	return day + (153*(int(month)-3)+2)/5 + 365*year +
		year/4 - year/100 + year/400 - 32045
}

// JulianToDate converts a Julian day number to a date.
func JulianToDate(dayNo int) (year int, month time.Month, day int) {
	// Richards, E. G. (2013) pp. 585–624

	e := 4*(dayNo+1401+(4*dayNo+274277)/146097*3/4-38) + 3
	h := e%1461/4*5 + 2

	day = h%153/5 + 1
	month = time.Month((h/153+2)%12 + 1)
	year = e/1461 - 4716 + (14-int(month))/12

	return year, month, day
}

// startOffset returns the offset (in days) from the start of a year to
// Monday of the given week. Offset may be negative.
func startOffset(y, week int) (offset int) {
	// This is optimized version of the following:
	//
	// return week*7 - ISOWeekday(y, 1, 4) - 3
	//
	// Uses Tomohiko Sakamoto's algorithm for calculating the weekday.

	y = y - 1
	return week*7 - (y+y/4-y/100+y/400+3)%7 - 4
}

// StartDate returns the starting date (Monday) of the given ISO 8601 week.
func StartDate(wyear, week int) (year int, month time.Month, day int) {
	return JulianToDate(
		DateToJulian(wyear, 1, 1) + startOffset(wyear, week))
}

func FromYearWeek(year, month, day int) (wyear, week int) {
	return fromYearWeek(year, time.Month(month), day)
}

func fromYearWeek(year int, month time.Month, day int) (wyear, week int) {
	week = (ordinalInYear(year, month, day) - ISOWeekday(year, month, day) + 10) / 7
	if week < 1 {
		return fromYearWeek(year-1, 12, 31) // last week of preceding year
	}

	if week == 53 &&
		DateToJulian(StartDate(year+1, 1)) <= DateToJulian(year, month, day) {
		return year + 1, 1 // first week of following year
	}
	return year, week
}

//NextMonthDate 获取当前日期的下个月的第一天和最后一天
func NextMonthDate(d string) (string, string) {
	now := ToTime(d)
	var nextMonth int
	var nextYear int
	year, month, _ := now.Date()

	if int(month) == 12 {
		nextMonth = 1
		nextYear = year + 1
	} else {
		nextMonth = int(month) + 1
		nextYear = year
	}

	currentLocation := now.Location()

	firstDate := time.Date(nextYear, time.Month(nextMonth), 1, 0, 0, 0, 0, currentLocation)
	lastDate := firstDate.AddDate(0, 1, -1)

	return Date("Y-m-d", firstDate), Date("Y-m-d", lastDate)
}

//NextMonthDate 获取当前日期的上个月的第一天和最后一天
func PrevMonthDate(d string) (string, string) {
	now := ToTime(d)
	var prevMonth int
	var prevYear int
	year, month, _ := now.Date()

	if int(month) == 1 {
		prevMonth = 12
		prevYear = year - 1
	} else {
		prevMonth = int(month) - 1
		prevYear = year
	}

	currentLocation := now.Location()

	firstDate := time.Date(prevYear, time.Month(prevMonth), 1, 0, 0, 0, 0, currentLocation)
	lastDate := firstDate.AddDate(0, 1, -1)

	return Date("Y-m-d", firstDate), Date("Y-m-d", lastDate)
}

// Pipeline gets aggregation pipeline from a string
func Pipeline(str string) mongo.Pipeline {
	var pipeline = []bson.D{}
	str = strings.TrimSpace(str)
	if strings.Index(str, "[") != 0 {
		var doc bson.M
		json.Unmarshal([]byte(str), &doc)
		var v bson.D
		b, _ := bson.Marshal(doc)
		bson.Unmarshal(b, &v)
		pipeline = append(pipeline, v)
	} else {
		var docs []bson.M
		json.Unmarshal([]byte(str), &docs)
		for _, doc := range docs {
			var v bson.D
			b, _ := bson.Marshal(doc)
			bson.Unmarshal(b, &v)
			pipeline = append(pipeline, v)
		}
	}
	return pipeline
}

//MonthDate 获取当前日期的当月的第一天和最后一天
func MonthDate(d string) (string, string) {
	now := ToTime(d)
	year, month, _ := now.Date()
	currentLocation := now.Location()
	firstDate := time.Date(year, month, 1, 0, 0, 0, 0, currentLocation)
	lastDate := firstDate.AddDate(0, 1, -1)
	return Date("Y-m-d", firstDate), Date("Y-m-d", lastDate)
}

//Month 获取当前月份前一年的月份 d Y-m-d
func Month(d string) ([]string, []int64) {
	now := ToTime(d)
	prevTime := now.AddDate(-1, 1, 0)

	res := make([]string, 0)
	resInt64 := make([]int64, 0)
	res = append(res, Date("Y-m", prevTime))
	resInt64 = append(resInt64, ToInt64(Date("Ym", prevTime)))

	for i := 1; i <= 11; i++ {
		prevNewTime := prevTime.AddDate(0, i, 0)
		res = append(res, Date("Y-m", prevNewTime))
		resInt64 = append(resInt64, ToInt64(Date("Ym", prevNewTime)))
	}
	return res, resInt64
}

//Day 获取起止日期中的天 s,e Y-m-d
func Day(s string, e string) ([]string, []int64) {
	start := ToTime(s)
	end := ToTime(e)
	total := int(math.Abs(float64(start.Sub(end).Hours() / 24)))
	res := make([]string, 0)
	resInt64 := make([]int64, 0)
	res = append(res, Date("Y-m-d", start))
	resInt64 = append(resInt64, ToInt64(Date("Ymd", start)))
	compareEnd := ToInt64(Date("Ymd", end))

	for i := 1; i <= total; i++ {
		prevNewDay := start.AddDate(0, 0, i)
		res = append(res, Date("Y-m-d", prevNewDay))
		compareTemp := ToInt64(Date("Ymd", prevNewDay))
		resInt64 = append(resInt64, compareTemp)
		if compareTemp == compareEnd {
			break
		}
	}
	return res, resInt64
}

//Day 获取起止日期中的小时 YmdH
func Hour(s string, e string) ([]string, []int64) {
	start := ToTime(s)
	end := ToTime(e)
	total := int(math.Abs(float64(start.Sub(end).Hours()))) + 23
	res := make([]string, 0)
	resInt64 := make([]int64, 0)

	for i := 0; i <= total; i++ {
		t, _ := time.ParseDuration(ToString(i) + "h")
		tempTime := start.Add(t)
		res = append(res, Date("Y-m-d H", tempTime))
		compareTemp := ToInt64(Date("YmdH", tempTime))
		resInt64 = append(resInt64, compareTemp)
	}
	return res, resInt64
}

//ConvertBson 构建 bson.D 查询数据
func ConvertBson(items bson.D, item bson.E) bson.D {
	key := make([]string, 0)
	for _, v := range items {
		key = append(key, v.Key)
	}
	if !InArray(item.Key, key) {
		items = append(items, item)
		return items
	}
	//再次赋值
	for i, newItem := range items {
		if newItem.Key == item.Key {
			tp := indirect(newItem.Value)
			switch tp.(type) {
			case bson.D:
				tran := items[i].Value.(bson.D)
				appendVal := item.Value.(bson.D)
				tran = append(tran, appendVal...)
				items[i].Value = tran
			default:
				items[i].Value = item.Value
			}
		}
	}
	return items
}

//StrPad 填充字符串
func StrPad(str1, str2 string, i int) string {
	n := i - len(str1) - len(str2)
	if n > 0 {
		for i := 0; i < n; i++ {
			str1 = str1 + "0"
		}
	}
	return str1 + str2
}

//DebugFormat debug
func DebugFormat(i interface{}) string {
	s := ToString(i)
	res := "Unknown"
	switch s {
	case "0":
		res = "Panic"
	case "1":
		res = "Fatal"
	case "2":
		res = "Error"
	case "3":
		res = "Warn"
	case "4":
		res = "Info"
	case "5":
		res = "Debug"
	case "6":
		res = "Trace"
	}
	return res
}

//Tag 数据标签
func Tag(i interface{}) string {
	replacer := strings.NewReplacer(tagPatterns...)
	format := ToString(i)
	return replacer.Replace(format)
}

func MarshalHTML(v interface{}) template.HTML {
	a, _ := json.Marshal(v)
	return template.HTML(a)
}

func MarshalJS(v interface{}) template.JS {
	a, _ := json.Marshal(v)
	return template.JS(a)
}

func JS(v string) template.JS {
	return template.JS(v)
}

func Static(p, v string) string {
	return "/" + p + "/" + v
}

func UnescapeString(v interface{}) string {
	a, _ := json.Marshal(v)
	return html.EscapeString(string(a))
}

//GetAppRootPath 获取应用程序根目录
func GetAppRootPath() string {
	return GetParentDirectory(GetCurrentDirectory())
}

func substr(s string, pos, length int) string {
	runes := []rune(s)
	l := pos + length
	if l > len(runes) {
		l = len(runes)
	}
	return string(runes[pos:l])
}

// GetParentDirectory 获取上级目录
func GetParentDirectory(dirctory string) string {
	return substr(dirctory, 0, strings.LastIndex(dirctory, "/"))
}

// GetCurrentDirectory 获取当前目录
func GetCurrentDirectory() string {
	dir, err := filepath.Abs(filepath.Dir(os.Args[0]))
	if err != nil {
		log.Fatal(err)
	}
	return strings.Replace(dir, "\\", "/", -1)
}

//Random 随机字符串
func Random() string {
	return uuid.New().String() + strconv.FormatInt(time.Now().UnixNano(), 10)
}

//VerifyPhone 验证电话号码是否正确
func VerifyPhone(phone string) bool {
	regular := "^((13[0-9])|(14[5,7])|(15[0-3,5-9])|(17[0,3,5-8])|(18[0-9])|166|198|199|(147))\\d{8}$"

	reg := regexp.MustCompile(regular)
	return reg.MatchString(phone)
}

//VerifyEmail 验证邮箱
func VerifyEmail(email string) bool {
	//pattern := `\w+([-+.]\w+)*@\w+([-.]\w+)*\.\w+([-.]\w+)*` //匹配电子邮箱
	pattern := `^[0-9a-z][_.0-9a-z-]{0,31}@([0-9a-z][0-9a-z-]{0,30}[0-9a-z]\.){1,4}[a-z]{2,4}$`

	reg := regexp.MustCompile(pattern)
	return reg.MatchString(email)
}

// VerifyIPv4 判断是否是否 ipv4 地址
func VerifyIPv4(address string) bool {
	res, _ := regexp.MatchString(`^((2[0-4]\d|25[0-5]|[01]?\d\d?)\.){3}(2[0-4]\d|25[0-5]|[01]?\d\d?)$`, address)
	return res
}

// VerifyIPv6 判断是否是 ipv6 地址
func VerifyIPv6(address string) bool {
	res, _ := regexp.MatchString(`^\s*((([0-9A-Fa-f]{1,4}:){7}([0-9A-Fa-f]{1,4}|:))|(([0-9A-Fa-f]{1,4}:){6}(:[0-9A-Fa-f]{1,4}|((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){5}(((:[0-9A-Fa-f]{1,4}){1,2})|:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3})|:))|(([0-9A-Fa-f]{1,4}:){4}(((:[0-9A-Fa-f]{1,4}){1,3})|((:[0-9A-Fa-f]{1,4})?:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){3}(((:[0-9A-Fa-f]{1,4}){1,4})|((:[0-9A-Fa-f]{1,4}){0,2}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){2}(((:[0-9A-Fa-f]{1,4}){1,5})|((:[0-9A-Fa-f]{1,4}){0,3}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(([0-9A-Fa-f]{1,4}:){1}(((:[0-9A-Fa-f]{1,4}){1,6})|((:[0-9A-Fa-f]{1,4}){0,4}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:))|(:(((:[0-9A-Fa-f]{1,4}){1,7})|((:[0-9A-Fa-f]{1,4}){0,5}:((25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)(\.(25[0-5]|2[0-4]\d|1\d\d|[1-9]?\d)){3}))|:)))(%.+)?\s*$`, address)
	return res
}

// FunctionName ...
func FunctionName(i interface{}) string {
	return runtime.FuncForPC(reflect.ValueOf(i).Pointer()).Name()
}

// ExtractIP returns a real ip
func ExtractIP(addr string) (string, error) {
	// if addr specified then its returned
	if len(addr) > 0 && (addr != "0.0.0.0" && addr != "[::]" && addr != "::") {
		return addr, nil
	}

	ifaces, err := net.Interfaces()
	if err != nil {
		return "", fmt.Errorf("Failed to get interfaces! Err: %v", err)
	}

	var addrs []net.Addr
	var loAddrs []net.Addr
	for _, iface := range ifaces {
		ifaceAddrs, err := iface.Addrs()
		if err != nil {
			// ignore error, interface can dissapear from system
			continue
		}
		if iface.Flags&net.FlagLoopback != 0 {
			loAddrs = append(loAddrs, ifaceAddrs...)
			continue
		}
		addrs = append(addrs, ifaceAddrs...)
	}
	addrs = append(addrs, loAddrs...)

	var ipAddr []byte
	var publicIP []byte

	for _, rawAddr := range addrs {
		var ip net.IP
		switch addr := rawAddr.(type) {
		case *net.IPAddr:
			ip = addr.IP
		case *net.IPNet:
			ip = addr.IP
		default:
			continue
		}

		if !isPrivateIP(ip.String()) {
			publicIP = ip
			continue
		}

		ipAddr = ip
		break
	}

	// return private ip
	if ipAddr != nil {
		return net.IP(ipAddr).String(), nil
	}

	// return public or virtual ip
	if publicIP != nil {
		return net.IP(publicIP).String(), nil
	}

	return "", fmt.Errorf("No IP address found, and explicit IP not provided")
}

func isPrivateIP(ipAddr string) bool {
	var privateBlocks []*net.IPNet

	for _, b := range []string{"10.0.0.0/8", "172.16.0.0/12", "192.168.0.0/16", "100.64.0.0/10", "fd00::/8"} {
		if _, block, err := net.ParseCIDR(b); err == nil {
			privateBlocks = append(privateBlocks, block)
		}
	}

	ip := net.ParseIP(ipAddr)
	for _, priv := range privateBlocks {
		if priv.Contains(ip) {
			return true
		}
	}
	return false
}

type intSlice []int

func (s intSlice) Len() int { return len(s) }

func (s intSlice) Swap(i, j int) { s[i], s[j] = s[j], s[i] }

func (s intSlice) Less(i, j int) bool { return s[i] < s[j] }

func equal(a, b []int) bool {
	if len(a) != len(b) {
		return false
	}
	for i, v := range a {
		if v != b[i] {
			return false
		}
	}
	return true
}

func GetMissingElement(arr []int) int {
	if arr == nil || len(arr) <= 0 {
		return 1
	}
	sort.Sort(intSlice(arr))
	var arrTemp []int

	for i := 1; i <= arr[len(arr)-1]; i++ {
		arrTemp = append(arrTemp, i)
	}
	if equal(arrTemp, arr) {
		return arr[len(arr)-1] + 1
	}
	for i, v := range arrTemp {
		if v != arr[i] {
			return v
		}
	}
	return 1
}