adding vendor folder

vendor/github.com/malfunkt/iprange/lex.go

@@ -0,0 +1,84 @@
+package iprange
+
+import (
+	"bytes"
+	"errors"
+	"log"
+	"strconv"
+	"unicode/utf8"
+)
+
+const eof = 0
+
+type ipLex struct {
+	line   []byte
+	peek   rune
+	output AddressRangeList
+	err    error
+}
+
+func (ip *ipLex) Lex(yylval *ipSymType) int {
+	for {
+		c := ip.next()
+		switch c {
+		case eof:
+			return eof
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			return ip.byte(c, yylval)
+		default:
+			return int(c)
+		}
+	}
+}
+
+func (ip *ipLex) byte(c rune, yylval *ipSymType) int {
+	add := func(b *bytes.Buffer, c rune) {
+		if _, err := b.WriteRune(c); err != nil {
+			log.Fatalf("WriteRune: %s", err)
+		}
+	}
+	var b bytes.Buffer
+	add(&b, c)
+L:
+	for {
+		c = ip.next()
+		switch c {
+		case '0', '1', '2', '3', '4', '5', '6', '7', '8', '9':
+			add(&b, c)
+		default:
+			break L
+		}
+	}
+	if c != eof {
+		ip.peek = c
+	}
+	octet, err := strconv.ParseUint(b.String(), 10, 32)
+	if err != nil {
+		log.Printf("badly formatted octet")
+		return eof
+	}
+	yylval.num = byte(octet)
+	return num
+}
+
+func (ip *ipLex) next() rune {
+	if ip.peek != eof {
+		r := ip.peek
+		ip.peek = eof
+		return r
+	}
+	if len(ip.line) == 0 {
+		return eof
+	}
+	c, size := utf8.DecodeRune(ip.line)
+	ip.line = ip.line[size:]
+	if c == utf8.RuneError && size == 1 {
+		log.Print("invalid utf8")
+		return ip.next()
+	}
+	return c
+}
+
+func (ip *ipLex) Error(s string) {
+	ip.err = errors.New(s)
+}