--- /dev/null
+// Protocol Buffers for Go with Gadgets
+//
+// Copyright (c) 2013, The GoGo Authors. All rights reserved.
+// http://github.com/gogo/protobuf
+//
+// Go support for Protocol Buffers - Google's data interchange format
+//
+// Copyright 2010 The Go Authors. All rights reserved.
+// https://github.com/golang/protobuf
+//
+// Redistribution and use in source and binary forms, with or without
+// modification, are permitted provided that the following conditions are
+// met:
+//
+// * Redistributions of source code must retain the above copyright
+// notice, this list of conditions and the following disclaimer.
+// * Redistributions in binary form must reproduce the above
+// copyright notice, this list of conditions and the following disclaimer
+// in the documentation and/or other materials provided with the
+// distribution.
+// * Neither the name of Google Inc. nor the names of its
+// contributors may be used to endorse or promote products derived from
+// this software without specific prior written permission.
+//
+// THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
+// "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
+// LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
+// A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
+// OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
+// SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
+// LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
+// DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
+// THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
+// (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
+// OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
+
+package proto
+
+// Functions for parsing the Text protocol buffer format.
+// TODO: message sets.
+
+import (
+ "encoding"
+ "errors"
+ "fmt"
+ "reflect"
+ "strconv"
+ "strings"
+ "time"
+ "unicode/utf8"
+)
+
+// Error string emitted when deserializing Any and fields are already set
+const anyRepeatedlyUnpacked = "Any message unpacked multiple times, or %q already set"
+
+type ParseError struct {
+ Message string
+ Line int // 1-based line number
+ Offset int // 0-based byte offset from start of input
+}
+
+func (p *ParseError) Error() string {
+ if p.Line == 1 {
+ // show offset only for first line
+ return fmt.Sprintf("line 1.%d: %v", p.Offset, p.Message)
+ }
+ return fmt.Sprintf("line %d: %v", p.Line, p.Message)
+}
+
+type token struct {
+ value string
+ err *ParseError
+ line int // line number
+ offset int // byte number from start of input, not start of line
+ unquoted string // the unquoted version of value, if it was a quoted string
+}
+
+func (t *token) String() string {
+ if t.err == nil {
+ return fmt.Sprintf("%q (line=%d, offset=%d)", t.value, t.line, t.offset)
+ }
+ return fmt.Sprintf("parse error: %v", t.err)
+}
+
+type textParser struct {
+ s string // remaining input
+ done bool // whether the parsing is finished (success or error)
+ backed bool // whether back() was called
+ offset, line int
+ cur token
+}
+
+func newTextParser(s string) *textParser {
+ p := new(textParser)
+ p.s = s
+ p.line = 1
+ p.cur.line = 1
+ return p
+}
+
+func (p *textParser) errorf(format string, a ...interface{}) *ParseError {
+ pe := &ParseError{fmt.Sprintf(format, a...), p.cur.line, p.cur.offset}
+ p.cur.err = pe
+ p.done = true
+ return pe
+}
+
+// Numbers and identifiers are matched by [-+._A-Za-z0-9]
+func isIdentOrNumberChar(c byte) bool {
+ switch {
+ case 'A' <= c && c <= 'Z', 'a' <= c && c <= 'z':
+ return true
+ case '0' <= c && c <= '9':
+ return true
+ }
+ switch c {
+ case '-', '+', '.', '_':
+ return true
+ }
+ return false
+}
+
+func isWhitespace(c byte) bool {
+ switch c {
+ case ' ', '\t', '\n', '\r':
+ return true
+ }
+ return false
+}
+
+func isQuote(c byte) bool {
+ switch c {
+ case '"', '\'':
+ return true
+ }
+ return false
+}
+
+func (p *textParser) skipWhitespace() {
+ i := 0
+ for i < len(p.s) && (isWhitespace(p.s[i]) || p.s[i] == '#') {
+ if p.s[i] == '#' {
+ // comment; skip to end of line or input
+ for i < len(p.s) && p.s[i] != '\n' {
+ i++
+ }
+ if i == len(p.s) {
+ break
+ }
+ }
+ if p.s[i] == '\n' {
+ p.line++
+ }
+ i++
+ }
+ p.offset += i
+ p.s = p.s[i:len(p.s)]
+ if len(p.s) == 0 {
+ p.done = true
+ }
+}
+
+func (p *textParser) advance() {
+ // Skip whitespace
+ p.skipWhitespace()
+ if p.done {
+ return
+ }
+
+ // Start of non-whitespace
+ p.cur.err = nil
+ p.cur.offset, p.cur.line = p.offset, p.line
+ p.cur.unquoted = ""
+ switch p.s[0] {
+ case '<', '>', '{', '}', ':', '[', ']', ';', ',', '/':
+ // Single symbol
+ p.cur.value, p.s = p.s[0:1], p.s[1:len(p.s)]
+ case '"', '\'':
+ // Quoted string
+ i := 1
+ for i < len(p.s) && p.s[i] != p.s[0] && p.s[i] != '\n' {
+ if p.s[i] == '\\' && i+1 < len(p.s) {
+ // skip escaped char
+ i++
+ }
+ i++
+ }
+ if i >= len(p.s) || p.s[i] != p.s[0] {
+ p.errorf("unmatched quote")
+ return
+ }
+ unq, err := unquoteC(p.s[1:i], rune(p.s[0]))
+ if err != nil {
+ p.errorf("invalid quoted string %s: %v", p.s[0:i+1], err)
+ return
+ }
+ p.cur.value, p.s = p.s[0:i+1], p.s[i+1:len(p.s)]
+ p.cur.unquoted = unq
+ default:
+ i := 0
+ for i < len(p.s) && isIdentOrNumberChar(p.s[i]) {
+ i++
+ }
+ if i == 0 {
+ p.errorf("unexpected byte %#x", p.s[0])
+ return
+ }
+ p.cur.value, p.s = p.s[0:i], p.s[i:len(p.s)]
+ }
+ p.offset += len(p.cur.value)
+}
+
+var (
+ errBadUTF8 = errors.New("proto: bad UTF-8")
+)
+
+func unquoteC(s string, quote rune) (string, error) {
+ // This is based on C++'s tokenizer.cc.
+ // Despite its name, this is *not* parsing C syntax.
+ // For instance, "\0" is an invalid quoted string.
+
+ // Avoid allocation in trivial cases.
+ simple := true
+ for _, r := range s {
+ if r == '\\' || r == quote {
+ simple = false
+ break
+ }
+ }
+ if simple {
+ return s, nil
+ }
+
+ buf := make([]byte, 0, 3*len(s)/2)
+ for len(s) > 0 {
+ r, n := utf8.DecodeRuneInString(s)
+ if r == utf8.RuneError && n == 1 {
+ return "", errBadUTF8
+ }
+ s = s[n:]
+ if r != '\\' {
+ if r < utf8.RuneSelf {
+ buf = append(buf, byte(r))
+ } else {
+ buf = append(buf, string(r)...)
+ }
+ continue
+ }
+
+ ch, tail, err := unescape(s)
+ if err != nil {
+ return "", err
+ }
+ buf = append(buf, ch...)
+ s = tail
+ }
+ return string(buf), nil
+}
+
+func unescape(s string) (ch string, tail string, err error) {
+ r, n := utf8.DecodeRuneInString(s)
+ if r == utf8.RuneError && n == 1 {
+ return "", "", errBadUTF8
+ }
+ s = s[n:]
+ switch r {
+ case 'a':
+ return "\a", s, nil
+ case 'b':
+ return "\b", s, nil
+ case 'f':
+ return "\f", s, nil
+ case 'n':
+ return "\n", s, nil
+ case 'r':
+ return "\r", s, nil
+ case 't':
+ return "\t", s, nil
+ case 'v':
+ return "\v", s, nil
+ case '?':
+ return "?", s, nil // trigraph workaround
+ case '\'', '"', '\\':
+ return string(r), s, nil
+ case '0', '1', '2', '3', '4', '5', '6', '7':
+ if len(s) < 2 {
+ return "", "", fmt.Errorf(`\%c requires 2 following digits`, r)
+ }
+ ss := string(r) + s[:2]
+ s = s[2:]
+ i, err := strconv.ParseUint(ss, 8, 8)
+ if err != nil {
+ return "", "", fmt.Errorf(`\%s contains non-octal digits`, ss)
+ }
+ return string([]byte{byte(i)}), s, nil
+ case 'x', 'X', 'u', 'U':
+ var n int
+ switch r {
+ case 'x', 'X':
+ n = 2
+ case 'u':
+ n = 4
+ case 'U':
+ n = 8
+ }
+ if len(s) < n {
+ return "", "", fmt.Errorf(`\%c requires %d following digits`, r, n)
+ }
+ ss := s[:n]
+ s = s[n:]
+ i, err := strconv.ParseUint(ss, 16, 64)
+ if err != nil {
+ return "", "", fmt.Errorf(`\%c%s contains non-hexadecimal digits`, r, ss)
+ }
+ if r == 'x' || r == 'X' {
+ return string([]byte{byte(i)}), s, nil
+ }
+ if i > utf8.MaxRune {
+ return "", "", fmt.Errorf(`\%c%s is not a valid Unicode code point`, r, ss)
+ }
+ return string(i), s, nil
+ }
+ return "", "", fmt.Errorf(`unknown escape \%c`, r)
+}
+
+// Back off the parser by one token. Can only be done between calls to next().
+// It makes the next advance() a no-op.
+func (p *textParser) back() { p.backed = true }
+
+// Advances the parser and returns the new current token.
+func (p *textParser) next() *token {
+ if p.backed || p.done {
+ p.backed = false
+ return &p.cur
+ }
+ p.advance()
+ if p.done {
+ p.cur.value = ""
+ } else if len(p.cur.value) > 0 && isQuote(p.cur.value[0]) {
+ // Look for multiple quoted strings separated by whitespace,
+ // and concatenate them.
+ cat := p.cur
+ for {
+ p.skipWhitespace()
+ if p.done || !isQuote(p.s[0]) {
+ break
+ }
+ p.advance()
+ if p.cur.err != nil {
+ return &p.cur
+ }
+ cat.value += " " + p.cur.value
+ cat.unquoted += p.cur.unquoted
+ }
+ p.done = false // parser may have seen EOF, but we want to return cat
+ p.cur = cat
+ }
+ return &p.cur
+}
+
+func (p *textParser) consumeToken(s string) error {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value != s {
+ p.back()
+ return p.errorf("expected %q, found %q", s, tok.value)
+ }
+ return nil
+}
+
+// Return a RequiredNotSetError indicating which required field was not set.
+func (p *textParser) missingRequiredFieldError(sv reflect.Value) *RequiredNotSetError {
+ st := sv.Type()
+ sprops := GetProperties(st)
+ for i := 0; i < st.NumField(); i++ {
+ if !isNil(sv.Field(i)) {
+ continue
+ }
+
+ props := sprops.Prop[i]
+ if props.Required {
+ return &RequiredNotSetError{fmt.Sprintf("%v.%v", st, props.OrigName)}
+ }
+ }
+ return &RequiredNotSetError{fmt.Sprintf("%v.<unknown field name>", st)} // should not happen
+}
+
+// Returns the index in the struct for the named field, as well as the parsed tag properties.
+func structFieldByName(sprops *StructProperties, name string) (int, *Properties, bool) {
+ i, ok := sprops.decoderOrigNames[name]
+ if ok {
+ return i, sprops.Prop[i], true
+ }
+ return -1, nil, false
+}
+
+// Consume a ':' from the input stream (if the next token is a colon),
+// returning an error if a colon is needed but not present.
+func (p *textParser) checkForColon(props *Properties, typ reflect.Type) *ParseError {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value != ":" {
+ // Colon is optional when the field is a group or message.
+ needColon := true
+ switch props.Wire {
+ case "group":
+ needColon = false
+ case "bytes":
+ // A "bytes" field is either a message, a string, or a repeated field;
+ // those three become *T, *string and []T respectively, so we can check for
+ // this field being a pointer to a non-string.
+ if typ.Kind() == reflect.Ptr {
+ // *T or *string
+ if typ.Elem().Kind() == reflect.String {
+ break
+ }
+ } else if typ.Kind() == reflect.Slice {
+ // []T or []*T
+ if typ.Elem().Kind() != reflect.Ptr {
+ break
+ }
+ } else if typ.Kind() == reflect.String {
+ // The proto3 exception is for a string field,
+ // which requires a colon.
+ break
+ }
+ needColon = false
+ }
+ if needColon {
+ return p.errorf("expected ':', found %q", tok.value)
+ }
+ p.back()
+ }
+ return nil
+}
+
+func (p *textParser) readStruct(sv reflect.Value, terminator string) error {
+ st := sv.Type()
+ sprops := GetProperties(st)
+ reqCount := sprops.reqCount
+ var reqFieldErr error
+ fieldSet := make(map[string]bool)
+ // A struct is a sequence of "name: value", terminated by one of
+ // '>' or '}', or the end of the input. A name may also be
+ // "[extension]" or "[type/url]".
+ //
+ // The whole struct can also be an expanded Any message, like:
+ // [type/url] < ... struct contents ... >
+ for {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value == terminator {
+ break
+ }
+ if tok.value == "[" {
+ // Looks like an extension or an Any.
+ //
+ // TODO: Check whether we need to handle
+ // namespace rooted names (e.g. ".something.Foo").
+ extName, err := p.consumeExtName()
+ if err != nil {
+ return err
+ }
+
+ if s := strings.LastIndex(extName, "/"); s >= 0 {
+ // If it contains a slash, it's an Any type URL.
+ messageName := extName[s+1:]
+ mt := MessageType(messageName)
+ if mt == nil {
+ return p.errorf("unrecognized message %q in google.protobuf.Any", messageName)
+ }
+ tok = p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ // consume an optional colon
+ if tok.value == ":" {
+ tok = p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ }
+ var terminator string
+ switch tok.value {
+ case "<":
+ terminator = ">"
+ case "{":
+ terminator = "}"
+ default:
+ return p.errorf("expected '{' or '<', found %q", tok.value)
+ }
+ v := reflect.New(mt.Elem())
+ if pe := p.readStruct(v.Elem(), terminator); pe != nil {
+ return pe
+ }
+ b, err := Marshal(v.Interface().(Message))
+ if err != nil {
+ return p.errorf("failed to marshal message of type %q: %v", messageName, err)
+ }
+ if fieldSet["type_url"] {
+ return p.errorf(anyRepeatedlyUnpacked, "type_url")
+ }
+ if fieldSet["value"] {
+ return p.errorf(anyRepeatedlyUnpacked, "value")
+ }
+ sv.FieldByName("TypeUrl").SetString(extName)
+ sv.FieldByName("Value").SetBytes(b)
+ fieldSet["type_url"] = true
+ fieldSet["value"] = true
+ continue
+ }
+
+ var desc *ExtensionDesc
+ // This could be faster, but it's functional.
+ // TODO: Do something smarter than a linear scan.
+ for _, d := range RegisteredExtensions(reflect.New(st).Interface().(Message)) {
+ if d.Name == extName {
+ desc = d
+ break
+ }
+ }
+ if desc == nil {
+ return p.errorf("unrecognized extension %q", extName)
+ }
+
+ props := &Properties{}
+ props.Parse(desc.Tag)
+
+ typ := reflect.TypeOf(desc.ExtensionType)
+ if err := p.checkForColon(props, typ); err != nil {
+ return err
+ }
+
+ rep := desc.repeated()
+
+ // Read the extension structure, and set it in
+ // the value we're constructing.
+ var ext reflect.Value
+ if !rep {
+ ext = reflect.New(typ).Elem()
+ } else {
+ ext = reflect.New(typ.Elem()).Elem()
+ }
+ if err := p.readAny(ext, props); err != nil {
+ if _, ok := err.(*RequiredNotSetError); !ok {
+ return err
+ }
+ reqFieldErr = err
+ }
+ ep := sv.Addr().Interface().(Message)
+ if !rep {
+ SetExtension(ep, desc, ext.Interface())
+ } else {
+ old, err := GetExtension(ep, desc)
+ var sl reflect.Value
+ if err == nil {
+ sl = reflect.ValueOf(old) // existing slice
+ } else {
+ sl = reflect.MakeSlice(typ, 0, 1)
+ }
+ sl = reflect.Append(sl, ext)
+ SetExtension(ep, desc, sl.Interface())
+ }
+ if err := p.consumeOptionalSeparator(); err != nil {
+ return err
+ }
+ continue
+ }
+
+ // This is a normal, non-extension field.
+ name := tok.value
+ var dst reflect.Value
+ fi, props, ok := structFieldByName(sprops, name)
+ if ok {
+ dst = sv.Field(fi)
+ } else if oop, ok := sprops.OneofTypes[name]; ok {
+ // It is a oneof.
+ props = oop.Prop
+ nv := reflect.New(oop.Type.Elem())
+ dst = nv.Elem().Field(0)
+ field := sv.Field(oop.Field)
+ if !field.IsNil() {
+ return p.errorf("field '%s' would overwrite already parsed oneof '%s'", name, sv.Type().Field(oop.Field).Name)
+ }
+ field.Set(nv)
+ }
+ if !dst.IsValid() {
+ return p.errorf("unknown field name %q in %v", name, st)
+ }
+
+ if dst.Kind() == reflect.Map {
+ // Consume any colon.
+ if err := p.checkForColon(props, dst.Type()); err != nil {
+ return err
+ }
+
+ // Construct the map if it doesn't already exist.
+ if dst.IsNil() {
+ dst.Set(reflect.MakeMap(dst.Type()))
+ }
+ key := reflect.New(dst.Type().Key()).Elem()
+ val := reflect.New(dst.Type().Elem()).Elem()
+
+ // The map entry should be this sequence of tokens:
+ // < key : KEY value : VALUE >
+ // However, implementations may omit key or value, and technically
+ // we should support them in any order. See b/28924776 for a time
+ // this went wrong.
+
+ tok := p.next()
+ var terminator string
+ switch tok.value {
+ case "<":
+ terminator = ">"
+ case "{":
+ terminator = "}"
+ default:
+ return p.errorf("expected '{' or '<', found %q", tok.value)
+ }
+ for {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value == terminator {
+ break
+ }
+ switch tok.value {
+ case "key":
+ if err := p.consumeToken(":"); err != nil {
+ return err
+ }
+ if err := p.readAny(key, props.MapKeyProp); err != nil {
+ return err
+ }
+ if err := p.consumeOptionalSeparator(); err != nil {
+ return err
+ }
+ case "value":
+ if err := p.checkForColon(props.MapValProp, dst.Type().Elem()); err != nil {
+ return err
+ }
+ if err := p.readAny(val, props.MapValProp); err != nil {
+ return err
+ }
+ if err := p.consumeOptionalSeparator(); err != nil {
+ return err
+ }
+ default:
+ p.back()
+ return p.errorf(`expected "key", "value", or %q, found %q`, terminator, tok.value)
+ }
+ }
+
+ dst.SetMapIndex(key, val)
+ continue
+ }
+
+ // Check that it's not already set if it's not a repeated field.
+ if !props.Repeated && fieldSet[name] {
+ return p.errorf("non-repeated field %q was repeated", name)
+ }
+
+ if err := p.checkForColon(props, dst.Type()); err != nil {
+ return err
+ }
+
+ // Parse into the field.
+ fieldSet[name] = true
+ if err := p.readAny(dst, props); err != nil {
+ if _, ok := err.(*RequiredNotSetError); !ok {
+ return err
+ }
+ reqFieldErr = err
+ }
+ if props.Required {
+ reqCount--
+ }
+
+ if err := p.consumeOptionalSeparator(); err != nil {
+ return err
+ }
+
+ }
+
+ if reqCount > 0 {
+ return p.missingRequiredFieldError(sv)
+ }
+ return reqFieldErr
+}
+
+// consumeExtName consumes extension name or expanded Any type URL and the
+// following ']'. It returns the name or URL consumed.
+func (p *textParser) consumeExtName() (string, error) {
+ tok := p.next()
+ if tok.err != nil {
+ return "", tok.err
+ }
+
+ // If extension name or type url is quoted, it's a single token.
+ if len(tok.value) > 2 && isQuote(tok.value[0]) && tok.value[len(tok.value)-1] == tok.value[0] {
+ name, err := unquoteC(tok.value[1:len(tok.value)-1], rune(tok.value[0]))
+ if err != nil {
+ return "", err
+ }
+ return name, p.consumeToken("]")
+ }
+
+ // Consume everything up to "]"
+ var parts []string
+ for tok.value != "]" {
+ parts = append(parts, tok.value)
+ tok = p.next()
+ if tok.err != nil {
+ return "", p.errorf("unrecognized type_url or extension name: %s", tok.err)
+ }
+ if p.done && tok.value != "]" {
+ return "", p.errorf("unclosed type_url or extension name")
+ }
+ }
+ return strings.Join(parts, ""), nil
+}
+
+// consumeOptionalSeparator consumes an optional semicolon or comma.
+// It is used in readStruct to provide backward compatibility.
+func (p *textParser) consumeOptionalSeparator() error {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value != ";" && tok.value != "," {
+ p.back()
+ }
+ return nil
+}
+
+func (p *textParser) readAny(v reflect.Value, props *Properties) error {
+ tok := p.next()
+ if tok.err != nil {
+ return tok.err
+ }
+ if tok.value == "" {
+ return p.errorf("unexpected EOF")
+ }
+ if len(props.CustomType) > 0 {
+ if props.Repeated {
+ t := reflect.TypeOf(v.Interface())
+ if t.Kind() == reflect.Slice {
+ tc := reflect.TypeOf(new(Marshaler))
+ ok := t.Elem().Implements(tc.Elem())
+ if ok {
+ fv := v
+ flen := fv.Len()
+ if flen == fv.Cap() {
+ nav := reflect.MakeSlice(v.Type(), flen, 2*flen+1)
+ reflect.Copy(nav, fv)
+ fv.Set(nav)
+ }
+ fv.SetLen(flen + 1)
+
+ // Read one.
+ p.back()
+ return p.readAny(fv.Index(flen), props)
+ }
+ }
+ }
+ if reflect.TypeOf(v.Interface()).Kind() == reflect.Ptr {
+ custom := reflect.New(props.ctype.Elem()).Interface().(Unmarshaler)
+ err := custom.Unmarshal([]byte(tok.unquoted))
+ if err != nil {
+ return p.errorf("%v %v: %v", err, v.Type(), tok.value)
+ }
+ v.Set(reflect.ValueOf(custom))
+ } else {
+ custom := reflect.New(reflect.TypeOf(v.Interface())).Interface().(Unmarshaler)
+ err := custom.Unmarshal([]byte(tok.unquoted))
+ if err != nil {
+ return p.errorf("%v %v: %v", err, v.Type(), tok.value)
+ }
+ v.Set(reflect.Indirect(reflect.ValueOf(custom)))
+ }
+ return nil
+ }
+ if props.StdTime {
+ fv := v
+ p.back()
+ props.StdTime = false
+ tproto := ×tamp{}
+ err := p.readAny(reflect.ValueOf(tproto).Elem(), props)
+ props.StdTime = true
+ if err != nil {
+ return err
+ }
+ tim, err := timestampFromProto(tproto)
+ if err != nil {
+ return err
+ }
+ if props.Repeated {
+ t := reflect.TypeOf(v.Interface())
+ if t.Kind() == reflect.Slice {
+ if t.Elem().Kind() == reflect.Ptr {
+ ts := fv.Interface().([]*time.Time)
+ ts = append(ts, &tim)
+ fv.Set(reflect.ValueOf(ts))
+ return nil
+ } else {
+ ts := fv.Interface().([]time.Time)
+ ts = append(ts, tim)
+ fv.Set(reflect.ValueOf(ts))
+ return nil
+ }
+ }
+ }
+ if reflect.TypeOf(v.Interface()).Kind() == reflect.Ptr {
+ v.Set(reflect.ValueOf(&tim))
+ } else {
+ v.Set(reflect.Indirect(reflect.ValueOf(&tim)))
+ }
+ return nil
+ }
+ if props.StdDuration {
+ fv := v
+ p.back()
+ props.StdDuration = false
+ dproto := &duration{}
+ err := p.readAny(reflect.ValueOf(dproto).Elem(), props)
+ props.StdDuration = true
+ if err != nil {
+ return err
+ }
+ dur, err := durationFromProto(dproto)
+ if err != nil {
+ return err
+ }
+ if props.Repeated {
+ t := reflect.TypeOf(v.Interface())
+ if t.Kind() == reflect.Slice {
+ if t.Elem().Kind() == reflect.Ptr {
+ ds := fv.Interface().([]*time.Duration)
+ ds = append(ds, &dur)
+ fv.Set(reflect.ValueOf(ds))
+ return nil
+ } else {
+ ds := fv.Interface().([]time.Duration)
+ ds = append(ds, dur)
+ fv.Set(reflect.ValueOf(ds))
+ return nil
+ }
+ }
+ }
+ if reflect.TypeOf(v.Interface()).Kind() == reflect.Ptr {
+ v.Set(reflect.ValueOf(&dur))
+ } else {
+ v.Set(reflect.Indirect(reflect.ValueOf(&dur)))
+ }
+ return nil
+ }
+ switch fv := v; fv.Kind() {
+ case reflect.Slice:
+ at := v.Type()
+ if at.Elem().Kind() == reflect.Uint8 {
+ // Special case for []byte
+ if tok.value[0] != '"' && tok.value[0] != '\'' {
+ // Deliberately written out here, as the error after
+ // this switch statement would write "invalid []byte: ...",
+ // which is not as user-friendly.
+ return p.errorf("invalid string: %v", tok.value)
+ }
+ bytes := []byte(tok.unquoted)
+ fv.Set(reflect.ValueOf(bytes))
+ return nil
+ }
+ // Repeated field.
+ if tok.value == "[" {
+ // Repeated field with list notation, like [1,2,3].
+ for {
+ fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
+ err := p.readAny(fv.Index(fv.Len()-1), props)
+ if err != nil {
+ return err
+ }
+ ntok := p.next()
+ if ntok.err != nil {
+ return ntok.err
+ }
+ if ntok.value == "]" {
+ break
+ }
+ if ntok.value != "," {
+ return p.errorf("Expected ']' or ',' found %q", ntok.value)
+ }
+ }
+ return nil
+ }
+ // One value of the repeated field.
+ p.back()
+ fv.Set(reflect.Append(fv, reflect.New(at.Elem()).Elem()))
+ return p.readAny(fv.Index(fv.Len()-1), props)
+ case reflect.Bool:
+ // true/1/t/True or false/f/0/False.
+ switch tok.value {
+ case "true", "1", "t", "True":
+ fv.SetBool(true)
+ return nil
+ case "false", "0", "f", "False":
+ fv.SetBool(false)
+ return nil
+ }
+ case reflect.Float32, reflect.Float64:
+ v := tok.value
+ // Ignore 'f' for compatibility with output generated by C++, but don't
+ // remove 'f' when the value is "-inf" or "inf".
+ if strings.HasSuffix(v, "f") && tok.value != "-inf" && tok.value != "inf" {
+ v = v[:len(v)-1]
+ }
+ if f, err := strconv.ParseFloat(v, fv.Type().Bits()); err == nil {
+ fv.SetFloat(f)
+ return nil
+ }
+ case reflect.Int8:
+ if x, err := strconv.ParseInt(tok.value, 0, 8); err == nil {
+ fv.SetInt(x)
+ return nil
+ }
+ case reflect.Int16:
+ if x, err := strconv.ParseInt(tok.value, 0, 16); err == nil {
+ fv.SetInt(x)
+ return nil
+ }
+ case reflect.Int32:
+ if x, err := strconv.ParseInt(tok.value, 0, 32); err == nil {
+ fv.SetInt(x)
+ return nil
+ }
+
+ if len(props.Enum) == 0 {
+ break
+ }
+ m, ok := enumValueMaps[props.Enum]
+ if !ok {
+ break
+ }
+ x, ok := m[tok.value]
+ if !ok {
+ break
+ }
+ fv.SetInt(int64(x))
+ return nil
+ case reflect.Int64:
+ if x, err := strconv.ParseInt(tok.value, 0, 64); err == nil {
+ fv.SetInt(x)
+ return nil
+ }
+
+ case reflect.Ptr:
+ // A basic field (indirected through pointer), or a repeated message/group
+ p.back()
+ fv.Set(reflect.New(fv.Type().Elem()))
+ return p.readAny(fv.Elem(), props)
+ case reflect.String:
+ if tok.value[0] == '"' || tok.value[0] == '\'' {
+ fv.SetString(tok.unquoted)
+ return nil
+ }
+ case reflect.Struct:
+ var terminator string
+ switch tok.value {
+ case "{":
+ terminator = "}"
+ case "<":
+ terminator = ">"
+ default:
+ return p.errorf("expected '{' or '<', found %q", tok.value)
+ }
+ // TODO: Handle nested messages which implement encoding.TextUnmarshaler.
+ return p.readStruct(fv, terminator)
+ case reflect.Uint8:
+ if x, err := strconv.ParseUint(tok.value, 0, 8); err == nil {
+ fv.SetUint(x)
+ return nil
+ }
+ case reflect.Uint16:
+ if x, err := strconv.ParseUint(tok.value, 0, 16); err == nil {
+ fv.SetUint(x)
+ return nil
+ }
+ case reflect.Uint32:
+ if x, err := strconv.ParseUint(tok.value, 0, 32); err == nil {
+ fv.SetUint(uint64(x))
+ return nil
+ }
+ case reflect.Uint64:
+ if x, err := strconv.ParseUint(tok.value, 0, 64); err == nil {
+ fv.SetUint(x)
+ return nil
+ }
+ }
+ return p.errorf("invalid %v: %v", v.Type(), tok.value)
+}
+
+// UnmarshalText reads a protocol buffer in Text format. UnmarshalText resets pb
+// before starting to unmarshal, so any existing data in pb is always removed.
+// If a required field is not set and no other error occurs,
+// UnmarshalText returns *RequiredNotSetError.
+func UnmarshalText(s string, pb Message) error {
+ if um, ok := pb.(encoding.TextUnmarshaler); ok {
+ return um.UnmarshalText([]byte(s))
+ }
+ pb.Reset()
+ v := reflect.ValueOf(pb)
+ return newTextParser(s).readStruct(v.Elem(), "")
+}
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