+++ /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(), "")
-}
OSDN Git Service
