diff options
Diffstat (limited to 'vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/generate.go')
| -rw-r--r-- | vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/generate.go | 159 |
1 files changed, 0 insertions, 159 deletions
diff --git a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/generate.go b/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/generate.go deleted file mode 100644 index e4481a4b0..000000000 --- a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/generate.go +++ /dev/null @@ -1,159 +0,0 @@ -package dns - -import ( - "bytes" - "errors" - "fmt" - "strconv" - "strings" -) - -// Parse the $GENERATE statement as used in BIND9 zones. -// See http://www.zytrax.com/books/dns/ch8/generate.html for instance. -// We are called after '$GENERATE '. After which we expect: -// * the range (12-24/2) -// * lhs (ownername) -// * [[ttl][class]] -// * type -// * rhs (rdata) -// But we are lazy here, only the range is parsed *all* occurrences -// of $ after that are interpreted. -// Any error are returned as a string value, the empty string signals -// "no error". -func generate(l lex, c chan lex, t chan *Token, o string) string { - step := 1 - if i := strings.IndexAny(l.token, "/"); i != -1 { - if i+1 == len(l.token) { - return "bad step in $GENERATE range" - } - if s, err := strconv.Atoi(l.token[i+1:]); err == nil { - if s < 0 { - return "bad step in $GENERATE range" - } - step = s - } else { - return "bad step in $GENERATE range" - } - l.token = l.token[:i] - } - sx := strings.SplitN(l.token, "-", 2) - if len(sx) != 2 { - return "bad start-stop in $GENERATE range" - } - start, err := strconv.Atoi(sx[0]) - if err != nil { - return "bad start in $GENERATE range" - } - end, err := strconv.Atoi(sx[1]) - if err != nil { - return "bad stop in $GENERATE range" - } - if end < 0 || start < 0 || end < start { - return "bad range in $GENERATE range" - } - - <-c // _BLANK - // Create a complete new string, which we then parse again. - s := "" -BuildRR: - l = <-c - if l.value != zNewline && l.value != zEOF { - s += l.token - goto BuildRR - } - for i := start; i <= end; i += step { - var ( - escape bool - dom bytes.Buffer - mod string - err error - offset int - ) - - for j := 0; j < len(s); j++ { // No 'range' because we need to jump around - switch s[j] { - case '\\': - if escape { - dom.WriteByte('\\') - escape = false - continue - } - escape = true - case '$': - mod = "%d" - offset = 0 - if escape { - dom.WriteByte('$') - escape = false - continue - } - escape = false - if j+1 >= len(s) { // End of the string - dom.WriteString(fmt.Sprintf(mod, i+offset)) - continue - } else { - if s[j+1] == '$' { - dom.WriteByte('$') - j++ - continue - } - } - // Search for { and } - if s[j+1] == '{' { // Modifier block - sep := strings.Index(s[j+2:], "}") - if sep == -1 { - return "bad modifier in $GENERATE" - } - mod, offset, err = modToPrintf(s[j+2 : j+2+sep]) - if err != nil { - return err.Error() - } - j += 2 + sep // Jump to it - } - dom.WriteString(fmt.Sprintf(mod, i+offset)) - default: - if escape { // Pretty useless here - escape = false - continue - } - dom.WriteByte(s[j]) - } - } - // Re-parse the RR and send it on the current channel t - rx, err := NewRR("$ORIGIN " + o + "\n" + dom.String()) - if err != nil { - return err.Error() - } - t <- &Token{RR: rx} - // Its more efficient to first built the rrlist and then parse it in - // one go! But is this a problem? - } - return "" -} - -// Convert a $GENERATE modifier 0,0,d to something Printf can deal with. -func modToPrintf(s string) (string, int, error) { - xs := strings.SplitN(s, ",", 3) - if len(xs) != 3 { - return "", 0, errors.New("bad modifier in $GENERATE") - } - // xs[0] is offset, xs[1] is width, xs[2] is base - if xs[2] != "o" && xs[2] != "d" && xs[2] != "x" && xs[2] != "X" { - return "", 0, errors.New("bad base in $GENERATE") - } - offset, err := strconv.Atoi(xs[0]) - if err != nil || offset > 255 { - return "", 0, errors.New("bad offset in $GENERATE") - } - width, err := strconv.Atoi(xs[1]) - if err != nil || width > 255 { - return "", offset, errors.New("bad width in $GENERATE") - } - switch { - case width < 0: - return "", offset, errors.New("bad width in $GENERATE") - case width == 0: - return "%" + xs[1] + xs[2], offset, nil - } - return "%0" + xs[1] + xs[2], offset, nil -} |