diff options
Diffstat (limited to 'vendor/github.com/godbus/dbus/sig.go')
-rw-r--r-- | vendor/github.com/godbus/dbus/sig.go | 257 |
1 files changed, 0 insertions, 257 deletions
diff --git a/vendor/github.com/godbus/dbus/sig.go b/vendor/github.com/godbus/dbus/sig.go deleted file mode 100644 index f45b53ce1..000000000 --- a/vendor/github.com/godbus/dbus/sig.go +++ /dev/null @@ -1,257 +0,0 @@ -package dbus - -import ( - "fmt" - "reflect" - "strings" -) - -var sigToType = map[byte]reflect.Type{ - 'y': byteType, - 'b': boolType, - 'n': int16Type, - 'q': uint16Type, - 'i': int32Type, - 'u': uint32Type, - 'x': int64Type, - 't': uint64Type, - 'd': float64Type, - 's': stringType, - 'g': signatureType, - 'o': objectPathType, - 'v': variantType, - 'h': unixFDIndexType, -} - -// Signature represents a correct type signature as specified by the D-Bus -// specification. The zero value represents the empty signature, "". -type Signature struct { - str string -} - -// SignatureOf returns the concatenation of all the signatures of the given -// values. It panics if one of them is not representable in D-Bus. -func SignatureOf(vs ...interface{}) Signature { - var s string - for _, v := range vs { - s += getSignature(reflect.TypeOf(v)) - } - return Signature{s} -} - -// SignatureOfType returns the signature of the given type. It panics if the -// type is not representable in D-Bus. -func SignatureOfType(t reflect.Type) Signature { - return Signature{getSignature(t)} -} - -// getSignature returns the signature of the given type and panics on unknown types. -func getSignature(t reflect.Type) string { - // handle simple types first - switch t.Kind() { - case reflect.Uint8: - return "y" - case reflect.Bool: - return "b" - case reflect.Int16: - return "n" - case reflect.Uint16: - return "q" - case reflect.Int32: - if t == unixFDType { - return "h" - } - return "i" - case reflect.Uint32: - if t == unixFDIndexType { - return "h" - } - return "u" - case reflect.Int64: - return "x" - case reflect.Uint64: - return "t" - case reflect.Float64: - return "d" - case reflect.Ptr: - return getSignature(t.Elem()) - case reflect.String: - if t == objectPathType { - return "o" - } - return "s" - case reflect.Struct: - if t == variantType { - return "v" - } else if t == signatureType { - return "g" - } - var s string - for i := 0; i < t.NumField(); i++ { - field := t.Field(i) - if field.PkgPath == "" && field.Tag.Get("dbus") != "-" { - s += getSignature(t.Field(i).Type) - } - } - return "(" + s + ")" - case reflect.Array, reflect.Slice: - return "a" + getSignature(t.Elem()) - case reflect.Map: - if !isKeyType(t.Key()) { - panic(InvalidTypeError{t}) - } - return "a{" + getSignature(t.Key()) + getSignature(t.Elem()) + "}" - } - panic(InvalidTypeError{t}) -} - -// ParseSignature returns the signature represented by this string, or a -// SignatureError if the string is not a valid signature. -func ParseSignature(s string) (sig Signature, err error) { - if len(s) == 0 { - return - } - if len(s) > 255 { - return Signature{""}, SignatureError{s, "too long"} - } - sig.str = s - for err == nil && len(s) != 0 { - err, s = validSingle(s, 0) - } - if err != nil { - sig = Signature{""} - } - - return -} - -// ParseSignatureMust behaves like ParseSignature, except that it panics if s -// is not valid. -func ParseSignatureMust(s string) Signature { - sig, err := ParseSignature(s) - if err != nil { - panic(err) - } - return sig -} - -// Empty retruns whether the signature is the empty signature. -func (s Signature) Empty() bool { - return s.str == "" -} - -// Single returns whether the signature represents a single, complete type. -func (s Signature) Single() bool { - err, r := validSingle(s.str, 0) - return err != nil && r == "" -} - -// String returns the signature's string representation. -func (s Signature) String() string { - return s.str -} - -// A SignatureError indicates that a signature passed to a function or received -// on a connection is not a valid signature. -type SignatureError struct { - Sig string - Reason string -} - -func (e SignatureError) Error() string { - return fmt.Sprintf("dbus: invalid signature: %q (%s)", e.Sig, e.Reason) -} - -// Try to read a single type from this string. If it was successfull, err is nil -// and rem is the remaining unparsed part. Otherwise, err is a non-nil -// SignatureError and rem is "". depth is the current recursion depth which may -// not be greater than 64 and should be given as 0 on the first call. -func validSingle(s string, depth int) (err error, rem string) { - if s == "" { - return SignatureError{Sig: s, Reason: "empty signature"}, "" - } - if depth > 64 { - return SignatureError{Sig: s, Reason: "container nesting too deep"}, "" - } - switch s[0] { - case 'y', 'b', 'n', 'q', 'i', 'u', 'x', 't', 'd', 's', 'g', 'o', 'v', 'h': - return nil, s[1:] - case 'a': - if len(s) > 1 && s[1] == '{' { - i := findMatching(s[1:], '{', '}') - if i == -1 { - return SignatureError{Sig: s, Reason: "unmatched '{'"}, "" - } - i++ - rem = s[i+1:] - s = s[2:i] - if err, _ = validSingle(s[:1], depth+1); err != nil { - return err, "" - } - err, nr := validSingle(s[1:], depth+1) - if err != nil { - return err, "" - } - if nr != "" { - return SignatureError{Sig: s, Reason: "too many types in dict"}, "" - } - return nil, rem - } - return validSingle(s[1:], depth+1) - case '(': - i := findMatching(s, '(', ')') - if i == -1 { - return SignatureError{Sig: s, Reason: "unmatched ')'"}, "" - } - rem = s[i+1:] - s = s[1:i] - for err == nil && s != "" { - err, s = validSingle(s, depth+1) - } - if err != nil { - rem = "" - } - return - } - return SignatureError{Sig: s, Reason: "invalid type character"}, "" -} - -func findMatching(s string, left, right rune) int { - n := 0 - for i, v := range s { - if v == left { - n++ - } else if v == right { - n-- - } - if n == 0 { - return i - } - } - return -1 -} - -// typeFor returns the type of the given signature. It ignores any left over -// characters and panics if s doesn't start with a valid type signature. -func typeFor(s string) (t reflect.Type) { - err, _ := validSingle(s, 0) - if err != nil { - panic(err) - } - - if t, ok := sigToType[s[0]]; ok { - return t - } - switch s[0] { - case 'a': - if s[1] == '{' { - i := strings.LastIndex(s, "}") - t = reflect.MapOf(sigToType[s[2]], typeFor(s[3:i])) - } else { - t = reflect.SliceOf(typeFor(s[1:])) - } - case '(': - t = interfacesType - } - return -} |