Adding upstream version 2.52.6.

Signed-off-by: Daniel Baumann <daniel@debian.org>

utils/common.go

@@ -0,0 +1,160 @@
+// ⚡️ Fiber is an Express inspired web framework written in Go with ☕️
+// 🤖 Github Repository: https://github.com/gofiber/fiber
+// 📌 API Documentation: https://docs.gofiber.io
+
+package utils
+
+import (
+	"bytes"
+	"crypto/rand"
+	"encoding/binary"
+	"encoding/hex"
+	"math"
+	"net"
+	"os"
+	"reflect"
+	"runtime"
+	"strconv"
+	"sync"
+	"sync/atomic"
+	"unicode"
+
+	googleuuid "github.com/google/uuid"
+)
+
+const (
+	toLowerTable = "\x00\x01\x02\x03\x04\x05\x06\a\b\t\n\v\f\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>?@abcdefghijklmnopqrstuvwxyz[\\]^_`abcdefghijklmnopqrstuvwxyz{|}~\u007f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
+	toUpperTable = "\x00\x01\x02\x03\x04\x05\x06\a\b\t\n\v\f\r\x0e\x0f\x10\x11\x12\x13\x14\x15\x16\x17\x18\x19\x1a\x1b\x1c\x1d\x1e\x1f !\"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_`ABCDEFGHIJKLMNOPQRSTUVWXYZ{|}~\u007f\x80\x81\x82\x83\x84\x85\x86\x87\x88\x89\x8a\x8b\x8c\x8d\x8e\x8f\x90\x91\x92\x93\x94\x95\x96\x97\x98\x99\x9a\x9b\x9c\x9d\x9e\x9f\xa0\xa1\xa2\xa3\xa4\xa5\xa6\xa7\xa8\xa9\xaa\xab\xac\xad\xae\xaf\xb0\xb1\xb2\xb3\xb4\xb5\xb6\xb7\xb8\xb9\xba\xbb\xbc\xbd\xbe\xbf\xc0\xc1\xc2\xc3\xc4\xc5\xc6\xc7\xc8\xc9\xca\xcb\xcc\xcd\xce\xcf\xd0\xd1\xd2\xd3\xd4\xd5\xd6\xd7\xd8\xd9\xda\xdb\xdc\xdd\xde\xdf\xe0\xe1\xe2\xe3\xe4\xe5\xe6\xe7\xe8\xe9\xea\xeb\xec\xed\xee\xef\xf0\xf1\xf2\xf3\xf4\xf5\xf6\xf7\xf8\xf9\xfa\xfb\xfc\xfd\xfe\xff"
+)
+
+// Copyright © 2014, Roger Peppe
+// github.com/rogpeppe/fastuuid
+// All rights reserved.
+
+const (
+	emptyUUID = "00000000-0000-0000-0000-000000000000"
+)
+
+var (
+	uuidSeed    [24]byte
+	uuidCounter uint64
+	uuidSetup   sync.Once
+	unitsSlice  = []byte("kmgtp")
+)
+
+// UUID generates an universally unique identifier (UUID)
+func UUID() string {
+	// Setup seed & counter once
+	uuidSetup.Do(func() {
+		if _, err := rand.Read(uuidSeed[:]); err != nil {
+			return
+		}
+		uuidCounter = binary.LittleEndian.Uint64(uuidSeed[:8])
+	})
+	if atomic.LoadUint64(&uuidCounter) <= 0 {
+		return emptyUUID
+	}
+	// first 8 bytes differ, taking a slice of the first 16 bytes
+	x := atomic.AddUint64(&uuidCounter, 1)
+	uuid := uuidSeed
+	binary.LittleEndian.PutUint64(uuid[:8], x)
+	uuid[6], uuid[9] = uuid[9], uuid[6]
+
+	// RFC4122 v4
+	uuid[6] = (uuid[6] & 0x0f) | 0x40
+	uuid[8] = uuid[8]&0x3f | 0x80
+
+	// create UUID representation of the first 128 bits
+	b := make([]byte, 36)
+	hex.Encode(b[0:8], uuid[0:4])
+	b[8] = '-'
+	hex.Encode(b[9:13], uuid[4:6])
+	b[13] = '-'
+	hex.Encode(b[14:18], uuid[6:8])
+	b[18] = '-'
+	hex.Encode(b[19:23], uuid[8:10])
+	b[23] = '-'
+	hex.Encode(b[24:], uuid[10:16])
+
+	return UnsafeString(b)
+}
+
+// UUIDv4 returns a Random (Version 4) UUID.
+// The strength of the UUIDs is based on the strength of the crypto/rand package.
+func UUIDv4() string {
+	token, err := googleuuid.NewRandom()
+	if err != nil {
+		return UUID()
+	}
+	return token.String()
+}
+
+// FunctionName returns function name
+func FunctionName(fn interface{}) string {
+	t := reflect.ValueOf(fn).Type()
+	if t.Kind() == reflect.Func {
+		return runtime.FuncForPC(reflect.ValueOf(fn).Pointer()).Name()
+	}
+	return t.String()
+}
+
+// GetArgument check if key is in arguments
+func GetArgument(arg string) bool {
+	for i := range os.Args[1:] {
+		if os.Args[1:][i] == arg {
+			return true
+		}
+	}
+	return false
+}
+
+// IncrementIPRange Find available next IP address
+func IncrementIPRange(ip net.IP) {
+	for j := len(ip) - 1; j >= 0; j-- {
+		ip[j]++
+		if ip[j] > 0 {
+			break
+		}
+	}
+}
+
+// ConvertToBytes returns integer size of bytes from human-readable string, ex. 42kb, 42M
+// Returns 0 if string is unrecognized
+func ConvertToBytes(humanReadableString string) int {
+	strLen := len(humanReadableString)
+	if strLen == 0 {
+		return 0
+	}
+	var unitPrefixPos, lastNumberPos int
+	// loop the string
+	for i := strLen - 1; i >= 0; i-- {
+		// check if the char is a number
+		if unicode.IsDigit(rune(humanReadableString[i])) {
+			lastNumberPos = i
+			break
+		} else if humanReadableString[i] != ' ' {
+			unitPrefixPos = i
+		}
+	}
+
+	if lastNumberPos < 0 {
+		return 0
+	}
+	// fetch the number part and parse it to float
+	size, err := strconv.ParseFloat(humanReadableString[:lastNumberPos+1], 64)
+	if err != nil {
+		return 0
+	}
+
+	// check the multiplier from the string and use it
+	if unitPrefixPos > 0 {
+		// convert multiplier char to lowercase and check if exists in units slice
+		index := bytes.IndexByte(unitsSlice, toLowerTable[humanReadableString[unitPrefixPos]])
+		if index != -1 {
+			const bytesPerKB = 1000
+			size *= math.Pow(bytesPerKB, float64(index+1))
+		}
+	}
+
+	return int(size)
+}