diff options
Diffstat (limited to 'vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/types_generate.go')
-rw-r--r-- | vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/types_generate.go | 271 |
1 files changed, 0 insertions, 271 deletions
diff --git a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/types_generate.go b/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/types_generate.go deleted file mode 100644 index dd1310942..000000000 --- a/vendor/github.com/rsc/letsencrypt/vendor/github.com/miekg/dns/types_generate.go +++ /dev/null @@ -1,271 +0,0 @@ -//+build ignore - -// types_generate.go is meant to run with go generate. It will use -// go/{importer,types} to track down all the RR struct types. Then for each type -// it will generate conversion tables (TypeToRR and TypeToString) and banal -// methods (len, Header, copy) based on the struct tags. The generated source is -// written to ztypes.go, and is meant to be checked into git. -package main - -import ( - "bytes" - "fmt" - "go/format" - "go/importer" - "go/types" - "log" - "os" - "strings" - "text/template" -) - -var skipLen = map[string]struct{}{ - "NSEC": {}, - "NSEC3": {}, - "OPT": {}, -} - -var packageHdr = ` -// *** DO NOT MODIFY *** -// AUTOGENERATED BY go generate from type_generate.go - -package dns - -import ( - "encoding/base64" - "net" -) - -` - -var TypeToRR = template.Must(template.New("TypeToRR").Parse(` -// TypeToRR is a map of constructors for each RR type. -var TypeToRR = map[uint16]func() RR{ -{{range .}}{{if ne . "RFC3597"}} Type{{.}}: func() RR { return new({{.}}) }, -{{end}}{{end}} } - -`)) - -var typeToString = template.Must(template.New("typeToString").Parse(` -// TypeToString is a map of strings for each RR type. -var TypeToString = map[uint16]string{ -{{range .}}{{if ne . "NSAPPTR"}} Type{{.}}: "{{.}}", -{{end}}{{end}} TypeNSAPPTR: "NSAP-PTR", -} - -`)) - -var headerFunc = template.Must(template.New("headerFunc").Parse(` -// Header() functions -{{range .}} func (rr *{{.}}) Header() *RR_Header { return &rr.Hdr } -{{end}} - -`)) - -// getTypeStruct will take a type and the package scope, and return the -// (innermost) struct if the type is considered a RR type (currently defined as -// those structs beginning with a RR_Header, could be redefined as implementing -// the RR interface). The bool return value indicates if embedded structs were -// resolved. -func getTypeStruct(t types.Type, scope *types.Scope) (*types.Struct, bool) { - st, ok := t.Underlying().(*types.Struct) - if !ok { - return nil, false - } - if st.Field(0).Type() == scope.Lookup("RR_Header").Type() { - return st, false - } - if st.Field(0).Anonymous() { - st, _ := getTypeStruct(st.Field(0).Type(), scope) - return st, true - } - return nil, false -} - -func main() { - // Import and type-check the package - pkg, err := importer.Default().Import("github.com/miekg/dns") - fatalIfErr(err) - scope := pkg.Scope() - - // Collect constants like TypeX - var numberedTypes []string - for _, name := range scope.Names() { - o := scope.Lookup(name) - if o == nil || !o.Exported() { - continue - } - b, ok := o.Type().(*types.Basic) - if !ok || b.Kind() != types.Uint16 { - continue - } - if !strings.HasPrefix(o.Name(), "Type") { - continue - } - name := strings.TrimPrefix(o.Name(), "Type") - if name == "PrivateRR" { - continue - } - numberedTypes = append(numberedTypes, name) - } - - // Collect actual types (*X) - var namedTypes []string - for _, name := range scope.Names() { - o := scope.Lookup(name) - if o == nil || !o.Exported() { - continue - } - if st, _ := getTypeStruct(o.Type(), scope); st == nil { - continue - } - if name == "PrivateRR" { - continue - } - - // Check if corresponding TypeX exists - if scope.Lookup("Type"+o.Name()) == nil && o.Name() != "RFC3597" { - log.Fatalf("Constant Type%s does not exist.", o.Name()) - } - - namedTypes = append(namedTypes, o.Name()) - } - - b := &bytes.Buffer{} - b.WriteString(packageHdr) - - // Generate TypeToRR - fatalIfErr(TypeToRR.Execute(b, namedTypes)) - - // Generate typeToString - fatalIfErr(typeToString.Execute(b, numberedTypes)) - - // Generate headerFunc - fatalIfErr(headerFunc.Execute(b, namedTypes)) - - // Generate len() - fmt.Fprint(b, "// len() functions\n") - for _, name := range namedTypes { - if _, ok := skipLen[name]; ok { - continue - } - o := scope.Lookup(name) - st, isEmbedded := getTypeStruct(o.Type(), scope) - if isEmbedded { - continue - } - fmt.Fprintf(b, "func (rr *%s) len() int {\n", name) - fmt.Fprintf(b, "l := rr.Hdr.len()\n") - for i := 1; i < st.NumFields(); i++ { - o := func(s string) { fmt.Fprintf(b, s, st.Field(i).Name()) } - - if _, ok := st.Field(i).Type().(*types.Slice); ok { - switch st.Tag(i) { - case `dns:"-"`: - // ignored - case `dns:"cdomain-name"`, `dns:"domain-name"`, `dns:"txt"`: - o("for _, x := range rr.%s { l += len(x) + 1 }\n") - default: - log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) - } - continue - } - - switch { - case st.Tag(i) == `dns:"-"`: - // ignored - case st.Tag(i) == `dns:"cdomain-name"`, st.Tag(i) == `dns:"domain-name"`: - o("l += len(rr.%s) + 1\n") - case st.Tag(i) == `dns:"octet"`: - o("l += len(rr.%s)\n") - case strings.HasPrefix(st.Tag(i), `dns:"size-base64`): - fallthrough - case st.Tag(i) == `dns:"base64"`: - o("l += base64.StdEncoding.DecodedLen(len(rr.%s))\n") - case strings.HasPrefix(st.Tag(i), `dns:"size-hex`): - fallthrough - case st.Tag(i) == `dns:"hex"`: - o("l += len(rr.%s)/2 + 1\n") - case st.Tag(i) == `dns:"a"`: - o("l += net.IPv4len // %s\n") - case st.Tag(i) == `dns:"aaaa"`: - o("l += net.IPv6len // %s\n") - case st.Tag(i) == `dns:"txt"`: - o("for _, t := range rr.%s { l += len(t) + 1 }\n") - case st.Tag(i) == `dns:"uint48"`: - o("l += 6 // %s\n") - case st.Tag(i) == "": - switch st.Field(i).Type().(*types.Basic).Kind() { - case types.Uint8: - o("l++ // %s\n") - case types.Uint16: - o("l += 2 // %s\n") - case types.Uint32: - o("l += 4 // %s\n") - case types.Uint64: - o("l += 8 // %s\n") - case types.String: - o("l += len(rr.%s) + 1\n") - default: - log.Fatalln(name, st.Field(i).Name()) - } - default: - log.Fatalln(name, st.Field(i).Name(), st.Tag(i)) - } - } - fmt.Fprintf(b, "return l }\n") - } - - // Generate copy() - fmt.Fprint(b, "// copy() functions\n") - for _, name := range namedTypes { - o := scope.Lookup(name) - st, isEmbedded := getTypeStruct(o.Type(), scope) - if isEmbedded { - continue - } - fmt.Fprintf(b, "func (rr *%s) copy() RR {\n", name) - fields := []string{"*rr.Hdr.copyHeader()"} - for i := 1; i < st.NumFields(); i++ { - f := st.Field(i).Name() - if sl, ok := st.Field(i).Type().(*types.Slice); ok { - t := sl.Underlying().String() - t = strings.TrimPrefix(t, "[]") - if strings.Contains(t, ".") { - splits := strings.Split(t, ".") - t = splits[len(splits)-1] - } - fmt.Fprintf(b, "%s := make([]%s, len(rr.%s)); copy(%s, rr.%s)\n", - f, t, f, f, f) - fields = append(fields, f) - continue - } - if st.Field(i).Type().String() == "net.IP" { - fields = append(fields, "copyIP(rr."+f+")") - continue - } - fields = append(fields, "rr."+f) - } - fmt.Fprintf(b, "return &%s{%s}\n", name, strings.Join(fields, ",")) - fmt.Fprintf(b, "}\n") - } - - // gofmt - res, err := format.Source(b.Bytes()) - if err != nil { - b.WriteTo(os.Stderr) - log.Fatal(err) - } - - // write result - f, err := os.Create("ztypes.go") - fatalIfErr(err) - defer f.Close() - f.Write(res) -} - -func fatalIfErr(err error) { - if err != nil { - log.Fatal(err) - } -} |