diff options
author | 2025-03-09 17:47:56 +0100 | |
---|---|---|
committer | 2025-03-10 01:59:49 +0100 | |
commit | 3ac1ee16f377d31a0fb80c8dae28b6239ac4229e (patch) | |
tree | f61faa581feaaeaba2542b9f2b8234a590684413 /vendor/github.com/miekg/dns/generate.go | |
parent | [chore] update URLs to forked source (diff) | |
download | gotosocial-3ac1ee16f377d31a0fb80c8dae28b6239ac4229e.tar.xz |
[chore] remove vendor
Diffstat (limited to 'vendor/github.com/miekg/dns/generate.go')
-rw-r--r-- | vendor/github.com/miekg/dns/generate.go | 248 |
1 files changed, 0 insertions, 248 deletions
diff --git a/vendor/github.com/miekg/dns/generate.go b/vendor/github.com/miekg/dns/generate.go deleted file mode 100644 index a81d2bc51..000000000 --- a/vendor/github.com/miekg/dns/generate.go +++ /dev/null @@ -1,248 +0,0 @@ -package dns - -import ( - "bytes" - "fmt" - "io" - "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. -func (zp *ZoneParser) generate(l lex) (RR, bool) { - token := l.token - step := int64(1) - if i := strings.IndexByte(token, '/'); i >= 0 { - if i+1 == len(token) { - return zp.setParseError("bad step in $GENERATE range", l) - } - - s, err := strconv.ParseInt(token[i+1:], 10, 64) - if err != nil || s <= 0 { - return zp.setParseError("bad step in $GENERATE range", l) - } - - step = s - token = token[:i] - } - - startStr, endStr, ok := strings.Cut(token, "-") - if !ok { - return zp.setParseError("bad start-stop in $GENERATE range", l) - } - - start, err := strconv.ParseInt(startStr, 10, 64) - if err != nil { - return zp.setParseError("bad start in $GENERATE range", l) - } - - end, err := strconv.ParseInt(endStr, 10, 64) - if err != nil { - return zp.setParseError("bad stop in $GENERATE range", l) - } - if end < 0 || start < 0 || end < start || (end-start)/step > 65535 { - return zp.setParseError("bad range in $GENERATE range", l) - } - - // _BLANK - l, ok = zp.c.Next() - if !ok || l.value != zBlank { - return zp.setParseError("garbage after $GENERATE range", l) - } - - // Create a complete new string, which we then parse again. - var s string - for l, ok := zp.c.Next(); ok; l, ok = zp.c.Next() { - if l.err { - return zp.setParseError("bad data in $GENERATE directive", l) - } - if l.value == zNewline { - break - } - - s += l.token - } - - r := &generateReader{ - s: s, - - cur: start, - start: start, - end: end, - step: step, - - file: zp.file, - lex: &l, - } - zp.sub = NewZoneParser(r, zp.origin, zp.file) - zp.sub.includeDepth, zp.sub.includeAllowed = zp.includeDepth, zp.includeAllowed - zp.sub.generateDisallowed = true - zp.sub.SetDefaultTTL(defaultTtl) - return zp.subNext() -} - -type generateReader struct { - s string - si int - - cur int64 - start int64 - end int64 - step int64 - - mod bytes.Buffer - - escape bool - - eof bool - - file string - lex *lex -} - -func (r *generateReader) parseError(msg string, end int) *ParseError { - r.eof = true // Make errors sticky. - - l := *r.lex - l.token = r.s[r.si-1 : end] - l.column += r.si // l.column starts one zBLANK before r.s - - return &ParseError{file: r.file, err: msg, lex: l} -} - -func (r *generateReader) Read(p []byte) (int, error) { - // NewZLexer, through NewZoneParser, should use ReadByte and - // not end up here. - - panic("not implemented") -} - -func (r *generateReader) ReadByte() (byte, error) { - if r.eof { - return 0, io.EOF - } - if r.mod.Len() > 0 { - return r.mod.ReadByte() - } - - if r.si >= len(r.s) { - r.si = 0 - r.cur += r.step - - r.eof = r.cur > r.end || r.cur < 0 - return '\n', nil - } - - si := r.si - r.si++ - - switch r.s[si] { - case '\\': - if r.escape { - r.escape = false - return '\\', nil - } - - r.escape = true - return r.ReadByte() - case '$': - if r.escape { - r.escape = false - return '$', nil - } - - mod := "%d" - - if si >= len(r.s)-1 { - // End of the string - fmt.Fprintf(&r.mod, mod, r.cur) - return r.mod.ReadByte() - } - - if r.s[si+1] == '$' { - r.si++ - return '$', nil - } - - var offset int64 - - // Search for { and } - if r.s[si+1] == '{' { - // Modifier block - sep := strings.Index(r.s[si+2:], "}") - if sep < 0 { - return 0, r.parseError("bad modifier in $GENERATE", len(r.s)) - } - - var errMsg string - mod, offset, errMsg = modToPrintf(r.s[si+2 : si+2+sep]) - if errMsg != "" { - return 0, r.parseError(errMsg, si+3+sep) - } - if r.start+offset < 0 || r.end+offset > 1<<31-1 { - return 0, r.parseError("bad offset in $GENERATE", si+3+sep) - } - - r.si += 2 + sep // Jump to it - } - - fmt.Fprintf(&r.mod, mod, r.cur+offset) - return r.mod.ReadByte() - default: - if r.escape { // Pretty useless here - r.escape = false - return r.ReadByte() - } - - return r.s[si], nil - } -} - -// Convert a $GENERATE modifier 0,0,d to something Printf can deal with. -func modToPrintf(s string) (string, int64, string) { - // Modifier is { offset [ ,width [ ,base ] ] } - provide default - // values for optional width and type, if necessary. - offStr, s, ok0 := strings.Cut(s, ",") - widthStr, s, ok1 := strings.Cut(s, ",") - base, _, ok2 := strings.Cut(s, ",") - if !ok0 { - widthStr = "0" - } - if !ok1 { - base = "d" - } - if ok2 { - return "", 0, "bad modifier in $GENERATE" - } - - switch base { - case "o", "d", "x", "X": - default: - return "", 0, "bad base in $GENERATE" - } - - offset, err := strconv.ParseInt(offStr, 10, 64) - if err != nil { - return "", 0, "bad offset in $GENERATE" - } - - width, err := strconv.ParseUint(widthStr, 10, 8) - if err != nil { - return "", 0, "bad width in $GENERATE" - } - - if width == 0 { - return "%" + base, offset, "" - } - - return "%0" + widthStr + base, offset, "" -} |