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rebase: vendor dependencies for Vault API

Browse Source 
Uses github.com/libopenstorage/secrets to communicate with Vault. This
removes the need for maintaining our own limited Vault APIs.

By adding the new dependency, several other packages got updated in the
process. Unused indirect dependencies have been removed from go.mod.

Signed-off-by: Niels de Vos <ndevos@redhat.com>
This commit is contained in:
Niels de Vos
2020-11-19 08:52:04 +01:00
committed by mergify[bot]
parent 7824cb5ed7
commit 91774fc936
618 changed files with 80427 additions and 31593 deletions
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665
vendor/google.golang.org/protobuf/internal/encoding/text/decode.go generated vendored Normal file
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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package text
import (
"bytes"
"fmt"
"io"
"regexp"
"strconv"
"unicode/utf8"
"google.golang.org/protobuf/internal/errors"
)
// Decoder is a token-based textproto decoder.
type Decoder struct {
// lastCall is last method called, either readCall or peekCall.
// Initial value is readCall.
lastCall call
// lastToken contains the last read token.
lastToken Token
// lastErr contains the last read error.
lastErr error
// openStack is a stack containing the byte characters for MessageOpen and
// ListOpen kinds. The top of stack represents the message or the list that
// the current token is nested in. An empty stack means the current token is
// at the top level message. The characters '{' and '<' both represent the
// MessageOpen kind.
openStack []byte
// orig is used in reporting line and column.
orig []byte
// in contains the unconsumed input.
in []byte
}
// NewDecoder returns a Decoder to read the given []byte.
func NewDecoder(b []byte) *Decoder {
return &Decoder{orig: b, in: b}
}
// ErrUnexpectedEOF means that EOF was encountered in the middle of the input.
var ErrUnexpectedEOF = errors.New("%v", io.ErrUnexpectedEOF)
// call specifies which Decoder method was invoked.
type call uint8
const (
readCall call = iota
peekCall
)
// Peek looks ahead and returns the next token and error without advancing a read.
func (d *Decoder) Peek() (Token, error) {
defer func() { d.lastCall = peekCall }()
if d.lastCall == readCall {
d.lastToken, d.lastErr = d.Read()
}
return d.lastToken, d.lastErr
}
// Read returns the next token.
// It will return an error if there is no valid token.
func (d *Decoder) Read() (Token, error) {
defer func() { d.lastCall = readCall }()
if d.lastCall == peekCall {
return d.lastToken, d.lastErr
}
tok, err := d.parseNext(d.lastToken.kind)
if err != nil {
return Token{}, err
}
switch tok.kind {
case comma, semicolon:
tok, err = d.parseNext(tok.kind)
if err != nil {
return Token{}, err
}
}
d.lastToken = tok
return tok, nil
}
const (
mismatchedFmt = "mismatched close character %q"
unexpectedFmt = "unexpected character %q"
)
// parseNext parses the next Token based on given last kind.
func (d *Decoder) parseNext(lastKind Kind) (Token, error) {
// Trim leading spaces.
d.consume(0)
isEOF := false
if len(d.in) == 0 {
isEOF = true
}
switch lastKind {
case EOF:
return d.consumeToken(EOF, 0, 0), nil
case bof:
// Start of top level message. Next token can be EOF or Name.
if isEOF {
return d.consumeToken(EOF, 0, 0), nil
}
return d.parseFieldName()
case Name:
// Next token can be MessageOpen, ListOpen or Scalar.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case '{', '<':
d.pushOpenStack(ch)
return d.consumeToken(MessageOpen, 1, 0), nil
case '[':
d.pushOpenStack(ch)
return d.consumeToken(ListOpen, 1, 0), nil
default:
return d.parseScalar()
}
case Scalar:
openKind, closeCh := d.currentOpenKind()
switch openKind {
case bof:
// Top level message.
// Next token can be EOF, comma, semicolon or Name.
if isEOF {
return d.consumeToken(EOF, 0, 0), nil
}
switch d.in[0] {
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
case MessageOpen:
// Next token can be MessageClose, comma, semicolon or Name.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(MessageClose, 1, 0), nil
case otherCloseChar[closeCh]:
return Token{}, d.newSyntaxError(mismatchedFmt, ch)
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
case ListOpen:
// Next token can be ListClose or comma.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case ']':
d.popOpenStack()
return d.consumeToken(ListClose, 1, 0), nil
case ',':
return d.consumeToken(comma, 1, 0), nil
default:
return Token{}, d.newSyntaxError(unexpectedFmt, ch)
}
}
case MessageOpen:
// Next token can be MessageClose or Name.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
_, closeCh := d.currentOpenKind()
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(MessageClose, 1, 0), nil
case otherCloseChar[closeCh]:
return Token{}, d.newSyntaxError(mismatchedFmt, ch)
default:
return d.parseFieldName()
}
case MessageClose:
openKind, closeCh := d.currentOpenKind()
switch openKind {
case bof:
// Top level message.
// Next token can be EOF, comma, semicolon or Name.
if isEOF {
return d.consumeToken(EOF, 0, 0), nil
}
switch ch := d.in[0]; ch {
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
case MessageOpen:
// Next token can be MessageClose, comma, semicolon or Name.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(MessageClose, 1, 0), nil
case otherCloseChar[closeCh]:
return Token{}, d.newSyntaxError(mismatchedFmt, ch)
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
case ListOpen:
// Next token can be ListClose or comma
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(ListClose, 1, 0), nil
case ',':
return d.consumeToken(comma, 1, 0), nil
default:
return Token{}, d.newSyntaxError(unexpectedFmt, ch)
}
}
case ListOpen:
// Next token can be ListClose, MessageStart or Scalar.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case ']':
d.popOpenStack()
return d.consumeToken(ListClose, 1, 0), nil
case '{', '<':
d.pushOpenStack(ch)
return d.consumeToken(MessageOpen, 1, 0), nil
default:
return d.parseScalar()
}
case ListClose:
openKind, closeCh := d.currentOpenKind()
switch openKind {
case bof:
// Top level message.
// Next token can be EOF, comma, semicolon or Name.
if isEOF {
return d.consumeToken(EOF, 0, 0), nil
}
switch ch := d.in[0]; ch {
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
case MessageOpen:
// Next token can be MessageClose, comma, semicolon or Name.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(MessageClose, 1, 0), nil
case otherCloseChar[closeCh]:
return Token{}, d.newSyntaxError(mismatchedFmt, ch)
case ',':
return d.consumeToken(comma, 1, 0), nil
case ';':
return d.consumeToken(semicolon, 1, 0), nil
default:
return d.parseFieldName()
}
default:
// It is not possible to have this case. Let it panic below.
}
case comma, semicolon:
openKind, closeCh := d.currentOpenKind()
switch openKind {
case bof:
// Top level message. Next token can be EOF or Name.
if isEOF {
return d.consumeToken(EOF, 0, 0), nil
}
return d.parseFieldName()
case MessageOpen:
// Next token can be MessageClose or Name.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case closeCh:
d.popOpenStack()
return d.consumeToken(MessageClose, 1, 0), nil
case otherCloseChar[closeCh]:
return Token{}, d.newSyntaxError(mismatchedFmt, ch)
default:
return d.parseFieldName()
}
case ListOpen:
if lastKind == semicolon {
// It is not be possible to have this case as logic here
// should not have produced a semicolon Token when inside a
// list. Let it panic below.
break
}
// Next token can be MessageOpen or Scalar.
if isEOF {
return Token{}, ErrUnexpectedEOF
}
switch ch := d.in[0]; ch {
case '{', '<':
d.pushOpenStack(ch)
return d.consumeToken(MessageOpen, 1, 0), nil
default:
return d.parseScalar()
}
}
}
line, column := d.Position(len(d.orig) - len(d.in))
panic(fmt.Sprintf("Decoder.parseNext: bug at handling line %d:%d with lastKind=%v", line, column, lastKind))
}
var otherCloseChar = map[byte]byte{
'}': '>',
'>': '}',
}
// currentOpenKind indicates whether current position is inside a message, list
// or top-level message by returning MessageOpen, ListOpen or bof respectively.
// If the returned kind is either a MessageOpen or ListOpen, it also returns the
// corresponding closing character.
func (d *Decoder) currentOpenKind() (Kind, byte) {
if len(d.openStack) == 0 {
return bof, 0
}
openCh := d.openStack[len(d.openStack)-1]
switch openCh {
case '{':
return MessageOpen, '}'
case '<':
return MessageOpen, '>'
case '[':
return ListOpen, ']'
}
panic(fmt.Sprintf("Decoder: openStack contains invalid byte %s", string(openCh)))
}
func (d *Decoder) pushOpenStack(ch byte) {
d.openStack = append(d.openStack, ch)
}
func (d *Decoder) popOpenStack() {
d.openStack = d.openStack[:len(d.openStack)-1]
}
// parseFieldName parses field name and separator.
func (d *Decoder) parseFieldName() (tok Token, err error) {
defer func() {
if err == nil && d.tryConsumeChar(':') {
tok.attrs |= hasSeparator
}
}()
// Extension or Any type URL.
if d.in[0] == '[' {
return d.parseTypeName()
}
// Identifier.
if size := parseIdent(d.in, false); size > 0 {
return d.consumeToken(Name, size, uint8(IdentName)), nil
}
// Field number. Identify if input is a valid number that is not negative
// and is decimal integer within 32-bit range.
if num := parseNumber(d.in); num.size > 0 {
if !num.neg && num.kind == numDec {
if _, err := strconv.ParseInt(string(d.in[:num.size]), 10, 32); err == nil {
return d.consumeToken(Name, num.size, uint8(FieldNumber)), nil
}
}
return Token{}, d.newSyntaxError("invalid field number: %s", d.in[:num.size])
}
return Token{}, d.newSyntaxError("invalid field name: %s", errRegexp.Find(d.in))
}
// parseTypeName parses Any type URL or extension field name. The name is
// enclosed in [ and ] characters. The C++ parser does not handle many legal URL
// strings. This implementation is more liberal and allows for the pattern
// ^[-_a-zA-Z0-9]+([./][-_a-zA-Z0-9]+)*`). Whitespaces and comments are allowed
// in between [ ], '.', '/' and the sub names.
func (d *Decoder) parseTypeName() (Token, error) {
startPos := len(d.orig) - len(d.in)
// Use alias s to advance first in order to use d.in for error handling.
// Caller already checks for [ as first character.
s := consume(d.in[1:], 0)
if len(s) == 0 {
return Token{}, ErrUnexpectedEOF
}
var name []byte
for len(s) > 0 && isTypeNameChar(s[0]) {
name = append(name, s[0])
s = s[1:]
}
s = consume(s, 0)
var closed bool
for len(s) > 0 && !closed {
switch {
case s[0] == ']':
s = s[1:]
closed = true
case s[0] == '/', s[0] == '.':
if len(name) > 0 && (name[len(name)-1] == '/' || name[len(name)-1] == '.') {
return Token{}, d.newSyntaxError("invalid type URL/extension field name: %s",
d.orig[startPos:len(d.orig)-len(s)+1])
}
name = append(name, s[0])
s = s[1:]
s = consume(s, 0)
for len(s) > 0 && isTypeNameChar(s[0]) {
name = append(name, s[0])
s = s[1:]
}
s = consume(s, 0)
default:
return Token{}, d.newSyntaxError(
"invalid type URL/extension field name: %s", d.orig[startPos:len(d.orig)-len(s)+1])
}
}
if !closed {
return Token{}, ErrUnexpectedEOF
}
// First character cannot be '.'. Last character cannot be '.' or '/'.
size := len(name)
if size == 0 || name[0] == '.' || name[size-1] == '.' || name[size-1] == '/' {
return Token{}, d.newSyntaxError("invalid type URL/extension field name: %s",
d.orig[startPos:len(d.orig)-len(s)])
}
d.in = s
endPos := len(d.orig) - len(d.in)
d.consume(0)
return Token{
kind: Name,
attrs: uint8(TypeName),
pos: startPos,
raw: d.orig[startPos:endPos],
str: string(name),
}, nil
}
func isTypeNameChar(b byte) bool {
return (b == '-' || b == '_' ||
('0' <= b && b <= '9') ||
('a' <= b && b <= 'z') ||
('A' <= b && b <= 'Z'))
}
func isWhiteSpace(b byte) bool {
switch b {
case ' ', '\n', '\r', '\t':
return true
default:
return false
}
}
// parseIdent parses an unquoted proto identifier and returns size.
// If allowNeg is true, it allows '-' to be the first character in the
// identifier. This is used when parsing literal values like -infinity, etc.
// Regular expression matches an identifier: `^[_a-zA-Z][_a-zA-Z0-9]*`
func parseIdent(input []byte, allowNeg bool) int {
var size int
s := input
if len(s) == 0 {
return 0
}
if allowNeg && s[0] == '-' {
s = s[1:]
size++
if len(s) == 0 {
return 0
}
}
switch {
case s[0] == '_',
'a' <= s[0] && s[0] <= 'z',
'A' <= s[0] && s[0] <= 'Z':
s = s[1:]
size++
default:
return 0
}
for len(s) > 0 && (s[0] == '_' ||
'a' <= s[0] && s[0] <= 'z' ||
'A' <= s[0] && s[0] <= 'Z' ||
'0' <= s[0] && s[0] <= '9') {
s = s[1:]
size++
}
if len(s) > 0 && !isDelim(s[0]) {
return 0
}
return size
}
// parseScalar parses for a string, literal or number value.
func (d *Decoder) parseScalar() (Token, error) {
if d.in[0] == '"' || d.in[0] == '\'' {
return d.parseStringValue()
}
if tok, ok := d.parseLiteralValue(); ok {
return tok, nil
}
if tok, ok := d.parseNumberValue(); ok {
return tok, nil
}
return Token{}, d.newSyntaxError("invalid scalar value: %s", errRegexp.Find(d.in))
}
// parseLiteralValue parses a literal value. A literal value is used for
// bools, special floats and enums. This function simply identifies that the
// field value is a literal.
func (d *Decoder) parseLiteralValue() (Token, bool) {
size := parseIdent(d.in, true)
if size == 0 {
return Token{}, false
}
return d.consumeToken(Scalar, size, literalValue), true
}
// consumeToken constructs a Token for given Kind from d.in and consumes given
// size-length from it.
func (d *Decoder) consumeToken(kind Kind, size int, attrs uint8) Token {
// Important to compute raw and pos before consuming.
tok := Token{
kind: kind,
attrs: attrs,
pos: len(d.orig) - len(d.in),
raw: d.in[:size],
}
d.consume(size)
return tok
}
// newSyntaxError returns a syntax error with line and column information for
// current position.
func (d *Decoder) newSyntaxError(f string, x ...interface{}) error {
e := errors.New(f, x...)
line, column := d.Position(len(d.orig) - len(d.in))
return errors.New("syntax error (line %d:%d): %v", line, column, e)
}
// Position returns line and column number of given index of the original input.
// It will panic if index is out of range.
func (d *Decoder) Position(idx int) (line int, column int) {
b := d.orig[:idx]
line = bytes.Count(b, []byte("\n")) + 1
if i := bytes.LastIndexByte(b, '\n'); i >= 0 {
b = b[i+1:]
}
column = utf8.RuneCount(b) + 1 // ignore multi-rune characters
return line, column
}
func (d *Decoder) tryConsumeChar(c byte) bool {
if len(d.in) > 0 && d.in[0] == c {
d.consume(1)
return true
}
return false
}
// consume consumes n bytes of input and any subsequent whitespace or comments.
func (d *Decoder) consume(n int) {
d.in = consume(d.in, n)
return
}
// consume consumes n bytes of input and any subsequent whitespace or comments.
func consume(b []byte, n int) []byte {
b = b[n:]
for len(b) > 0 {
switch b[0] {
case ' ', '\n', '\r', '\t':
b = b[1:]
case '#':
if i := bytes.IndexByte(b, '\n'); i >= 0 {
b = b[i+len("\n"):]
} else {
b = nil
}
default:
return b
}
}
return b
}
// Any sequence that looks like a non-delimiter (for error reporting).
var errRegexp = regexp.MustCompile(`^([-+._a-zA-Z0-9\/]+|.)`)
// isDelim returns true if given byte is a delimiter character.
func isDelim(c byte) bool {
return !(c == '-' || c == '+' || c == '.' || c == '_' ||
('a' <= c && c <= 'z') ||
('A' <= c && c <= 'Z') ||
('0' <= c && c <= '9'))
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package text
// parseNumberValue parses a number from the input and returns a Token object.
func (d *Decoder) parseNumberValue() (Token, bool) {
in := d.in
num := parseNumber(in)
if num.size == 0 {
return Token{}, false
}
numAttrs := num.kind
if num.neg {
numAttrs |= isNegative
}
strSize := num.size
last := num.size - 1
if num.kind == numFloat && (d.in[last] == 'f' || d.in[last] == 'F') {
strSize = last
}
tok := Token{
kind: Scalar,
attrs: numberValue,
pos: len(d.orig) - len(d.in),
raw: d.in[:num.size],
str: string(d.in[:strSize]),
numAttrs: numAttrs,
}
d.consume(num.size)
return tok, true
}
const (
numDec uint8 = (1 << iota) / 2
numHex
numOct
numFloat
)
// number is the result of parsing out a valid number from parseNumber. It
// contains data for doing float or integer conversion via the strconv package
// in conjunction with the input bytes.
type number struct {
kind uint8
neg bool
size int
}
// parseNumber constructs a number object from given input. It allows for the
// following patterns:
// integer: ^-?([1-9][0-9]*|0[xX][0-9a-fA-F]+|0[0-7]*)
// float: ^-?((0|[1-9][0-9]*)?([.][0-9]*)?([eE][+-]?[0-9]+)?[fF]?)
// It also returns the number of parsed bytes for the given number, 0 if it is
// not a number.
func parseNumber(input []byte) number {
kind := numDec
var size int
var neg bool
s := input
if len(s) == 0 {
return number{}
}
// Optional -
if s[0] == '-' {
neg = true
s = s[1:]
size++
if len(s) == 0 {
return number{}
}
}
// C++ allows for whitespace and comments in between the negative sign and
// the rest of the number. This logic currently does not but is consistent
// with v1.
switch {
case s[0] == '0':
if len(s) > 1 {
switch {
case s[1] == 'x' || s[1] == 'X':
// Parse as hex number.
kind = numHex
n := 2
s = s[2:]
for len(s) > 0 && (('0' <= s[0] && s[0] <= '9') ||
('a' <= s[0] && s[0] <= 'f') ||
('A' <= s[0] && s[0] <= 'F')) {
s = s[1:]
n++
}
if n == 2 {
return number{}
}
size += n
case '0' <= s[1] && s[1] <= '7':
// Parse as octal number.
kind = numOct
n := 2
s = s[2:]
for len(s) > 0 && '0' <= s[0] && s[0] <= '7' {
s = s[1:]
n++
}
size += n
}
if kind&(numHex|numOct) > 0 {
if len(s) > 0 && !isDelim(s[0]) {
return number{}
}
return number{kind: kind, neg: neg, size: size}
}
}
s = s[1:]
size++
case '1' <= s[0] && s[0] <= '9':
n := 1
s = s[1:]
for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
s = s[1:]
n++
}
size += n
case s[0] == '.':
// Set kind to numFloat to signify the intent to parse as float. And
// that it needs to have other digits after '.'.
kind = numFloat
default:
return number{}
}
// . followed by 0 or more digits.
if len(s) > 0 && s[0] == '.' {
n := 1
s = s[1:]
// If decimal point was before any digits, it should be followed by
// other digits.
if len(s) == 0 && kind == numFloat {
return number{}
}
for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
s = s[1:]
n++
}
size += n
kind = numFloat
}
// e or E followed by an optional - or + and 1 or more digits.
if len(s) >= 2 && (s[0] == 'e' || s[0] == 'E') {
kind = numFloat
s = s[1:]
n := 1
if s[0] == '+' || s[0] == '-' {
s = s[1:]
n++
if len(s) == 0 {
return number{}
}
}
for len(s) > 0 && '0' <= s[0] && s[0] <= '9' {
s = s[1:]
n++
}
size += n
}
// Optional suffix f or F for floats.
if len(s) > 0 && (s[0] == 'f' || s[0] == 'F') {
kind = numFloat
s = s[1:]
size++
}
// Check that next byte is a delimiter or it is at the end.
if len(s) > 0 && !isDelim(s[0]) {
return number{}
}
return number{kind: kind, neg: neg, size: size}
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package text
import (
"bytes"
"strconv"
"strings"
"unicode"
"unicode/utf16"
"unicode/utf8"
"google.golang.org/protobuf/internal/strs"
)
// parseStringValue parses string field token.
// This differs from parseString since the text format allows
// multiple back-to-back string literals where they are semantically treated
// as a single large string with all values concatenated.
//
// E.g., `"foo" "bar" "baz"` => "foobarbaz"
func (d *Decoder) parseStringValue() (Token, error) {
// Note that the ending quote is sufficient to unambiguously mark the end
// of a string. Thus, the text grammar does not require intervening
// whitespace or control characters in-between strings.
// Thus, the following is valid:
// `"foo"'bar'"baz"` => "foobarbaz"
in0 := d.in
var ss []string
for len(d.in) > 0 && (d.in[0] == '"' || d.in[0] == '\'') {
s, err := d.parseString()
if err != nil {
return Token{}, err
}
ss = append(ss, s)
}
// d.in already points to the end of the value at this point.
return Token{
kind: Scalar,
attrs: stringValue,
pos: len(d.orig) - len(in0),
raw: in0[:len(in0)-len(d.in)],
str: strings.Join(ss, ""),
}, nil
}
// parseString parses a string value enclosed in " or '.
func (d *Decoder) parseString() (string, error) {
in := d.in
if len(in) == 0 {
return "", ErrUnexpectedEOF
}
quote := in[0]
in = in[1:]
i := indexNeedEscapeInBytes(in)
in, out := in[i:], in[:i:i] // set cap to prevent mutations
for len(in) > 0 {
switch r, n := utf8.DecodeRune(in); {
case r == utf8.RuneError && n == 1:
return "", d.newSyntaxError("invalid UTF-8 detected")
case r == 0 || r == '\n':
return "", d.newSyntaxError("invalid character %q in string", r)
case r == rune(quote):
in = in[1:]
d.consume(len(d.in) - len(in))
return string(out), nil
case r == '\\':
if len(in) < 2 {
return "", ErrUnexpectedEOF
}
switch r := in[1]; r {
case '"', '\'', '\\', '?':
in, out = in[2:], append(out, r)
case 'a':
in, out = in[2:], append(out, '\a')
case 'b':
in, out = in[2:], append(out, '\b')
case 'n':
in, out = in[2:], append(out, '\n')
case 'r':
in, out = in[2:], append(out, '\r')
case 't':
in, out = in[2:], append(out, '\t')
case 'v':
in, out = in[2:], append(out, '\v')
case 'f':
in, out = in[2:], append(out, '\f')
case '0', '1', '2', '3', '4', '5', '6', '7':
// One, two, or three octal characters.
n := len(in[1:]) - len(bytes.TrimLeft(in[1:], "01234567"))
if n > 3 {
n = 3
}
v, err := strconv.ParseUint(string(in[1:1+n]), 8, 8)
if err != nil {
return "", d.newSyntaxError("invalid octal escape code %q in string", in[:1+n])
}
in, out = in[1+n:], append(out, byte(v))
case 'x':
// One or two hexadecimal characters.
n := len(in[2:]) - len(bytes.TrimLeft(in[2:], "0123456789abcdefABCDEF"))
if n > 2 {
n = 2
}
v, err := strconv.ParseUint(string(in[2:2+n]), 16, 8)
if err != nil {
return "", d.newSyntaxError("invalid hex escape code %q in string", in[:2+n])
}
in, out = in[2+n:], append(out, byte(v))
case 'u', 'U':
// Four or eight hexadecimal characters
n := 6
if r == 'U' {
n = 10
}
if len(in) < n {
return "", ErrUnexpectedEOF
}
v, err := strconv.ParseUint(string(in[2:n]), 16, 32)
if utf8.MaxRune < v || err != nil {
return "", d.newSyntaxError("invalid Unicode escape code %q in string", in[:n])
}
in = in[n:]
r := rune(v)
if utf16.IsSurrogate(r) {
if len(in) < 6 {
return "", ErrUnexpectedEOF
}
v, err := strconv.ParseUint(string(in[2:6]), 16, 16)
r = utf16.DecodeRune(r, rune(v))
if in[0] != '\\' || in[1] != 'u' || r == unicode.ReplacementChar || err != nil {
return "", d.newSyntaxError("invalid Unicode escape code %q in string", in[:6])
}
in = in[6:]
}
out = append(out, string(r)...)
default:
return "", d.newSyntaxError("invalid escape code %q in string", in[:2])
}
default:
i := indexNeedEscapeInBytes(in[n:])
in, out = in[n+i:], append(out, in[:n+i]...)
}
}
return "", ErrUnexpectedEOF
}
// indexNeedEscapeInString returns the index of the character that needs
// escaping. If no characters need escaping, this returns the input length.
func indexNeedEscapeInBytes(b []byte) int { return indexNeedEscapeInString(strs.UnsafeString(b)) }
// UnmarshalString returns an unescaped string given a textproto string value.
// String value needs to contain single or double quotes. This is only used by
// internal/encoding/defval package for unmarshaling bytes.
func UnmarshalString(s string) (string, error) {
d := NewDecoder([]byte(s))
return d.parseString()
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package text
import (
"bytes"
"fmt"
"math"
"strconv"
"strings"
"google.golang.org/protobuf/internal/flags"
)
// Kind represents a token kind expressible in the textproto format.
type Kind uint8
// Kind values.
const (
Invalid Kind = iota
EOF
Name // Name indicates the field name.
Scalar // Scalar are scalar values, e.g. "string", 47, ENUM_LITERAL, true.
MessageOpen
MessageClose
ListOpen
ListClose
// comma and semi-colon are only for parsing in between values and should not be exposed.
comma
semicolon
// bof indicates beginning of file, which is the default token
// kind at the beginning of parsing.
bof = Invalid
)
func (t Kind) String() string {
switch t {
case Invalid:
return "<invalid>"
case EOF:
return "eof"
case Scalar:
return "scalar"
case Name:
return "name"
case MessageOpen:
return "{"
case MessageClose:
return "}"
case ListOpen:
return "["
case ListClose:
return "]"
case comma:
return ","
case semicolon:
return ";"
default:
return fmt.Sprintf("<invalid:%v>", uint8(t))
}
}
// NameKind represents different types of field names.
type NameKind uint8
// NameKind values.
const (
IdentName NameKind = iota + 1
TypeName
FieldNumber
)
func (t NameKind) String() string {
switch t {
case IdentName:
return "IdentName"
case TypeName:
return "TypeName"
case FieldNumber:
return "FieldNumber"
default:
return fmt.Sprintf("<invalid:%v>", uint8(t))
}
}
// Bit mask in Token.attrs to indicate if a Name token is followed by the
// separator char ':'. The field name separator char is optional for message
// field or repeated message field, but required for all other types. Decoder
// simply indicates whether a Name token is followed by separator or not. It is
// up to the prototext package to validate.
const hasSeparator = 1 << 7
// Scalar value types.
const (
numberValue = iota + 1
stringValue
literalValue
)
// Bit mask in Token.numAttrs to indicate that the number is a negative.
const isNegative = 1 << 7
// Token provides a parsed token kind and value. Values are provided by the
// different accessor methods.
type Token struct {
// Kind of the Token object.
kind Kind
// attrs contains metadata for the following Kinds:
// Name: hasSeparator bit and one of NameKind.
// Scalar: one of numberValue, stringValue, literalValue.
attrs uint8
// numAttrs contains metadata for numberValue:
// - highest bit is whether negative or positive.
// - lower bits indicate one of numDec, numHex, numOct, numFloat.
numAttrs uint8
// pos provides the position of the token in the original input.
pos int
// raw bytes of the serialized token.
// This is a subslice into the original input.
raw []byte
// str contains parsed string for the following:
// - stringValue of Scalar kind
// - numberValue of Scalar kind
// - TypeName of Name kind
str string
}
// Kind returns the token kind.
func (t Token) Kind() Kind {
return t.kind
}
// RawString returns the read value in string.
func (t Token) RawString() string {
return string(t.raw)
}
// Pos returns the token position from the input.
func (t Token) Pos() int {
return t.pos
}
// NameKind returns IdentName, TypeName or FieldNumber.
// It panics if type is not Name.
func (t Token) NameKind() NameKind {
if t.kind == Name {
return NameKind(t.attrs &^ hasSeparator)
}
panic(fmt.Sprintf("Token is not a Name type: %s", t.kind))
}
// HasSeparator returns true if the field name is followed by the separator char
// ':', else false. It panics if type is not Name.
func (t Token) HasSeparator() bool {
if t.kind == Name {
return t.attrs&hasSeparator != 0
}
panic(fmt.Sprintf("Token is not a Name type: %s", t.kind))
}
// IdentName returns the value for IdentName type.
func (t Token) IdentName() string {
if t.kind == Name && t.attrs&uint8(IdentName) != 0 {
return string(t.raw)
}
panic(fmt.Sprintf("Token is not an IdentName: %s:%s", t.kind, NameKind(t.attrs&^hasSeparator)))
}
// TypeName returns the value for TypeName type.
func (t Token) TypeName() string {
if t.kind == Name && t.attrs&uint8(TypeName) != 0 {
return t.str
}
panic(fmt.Sprintf("Token is not a TypeName: %s:%s", t.kind, NameKind(t.attrs&^hasSeparator)))
}
// FieldNumber returns the value for FieldNumber type. It returns a
// non-negative int32 value. Caller will still need to validate for the correct
// field number range.
func (t Token) FieldNumber() int32 {
if t.kind != Name || t.attrs&uint8(FieldNumber) == 0 {
panic(fmt.Sprintf("Token is not a FieldNumber: %s:%s", t.kind, NameKind(t.attrs&^hasSeparator)))
}
// Following should not return an error as it had already been called right
// before this Token was constructed.
num, _ := strconv.ParseInt(string(t.raw), 10, 32)
return int32(num)
}
// String returns the string value for a Scalar type.
func (t Token) String() (string, bool) {
if t.kind != Scalar || t.attrs != stringValue {
return "", false
}
return t.str, true
}
// Enum returns the literal value for a Scalar type for use as enum literals.
func (t Token) Enum() (string, bool) {
if t.kind != Scalar || t.attrs != literalValue || (len(t.raw) > 0 && t.raw[0] == '-') {
return "", false
}
return string(t.raw), true
}
// Bool returns the bool value for a Scalar type.
func (t Token) Bool() (bool, bool) {
if t.kind != Scalar {
return false, false
}
switch t.attrs {
case literalValue:
if b, ok := boolLits[string(t.raw)]; ok {
return b, true
}
case numberValue:
// Unsigned integer representation of 0 or 1 is permitted: 00, 0x0, 01,
// 0x1, etc.
n, err := strconv.ParseUint(t.str, 0, 64)
if err == nil {
switch n {
case 0:
return false, true
case 1:
return true, true
}
}
}
return false, false
}
// These exact boolean literals are the ones supported in C++.
var boolLits = map[string]bool{
"t": true,
"true": true,
"True": true,
"f": false,
"false": false,
"False": false,
}
// Uint64 returns the uint64 value for a Scalar type.
func (t Token) Uint64() (uint64, bool) {
if t.kind != Scalar || t.attrs != numberValue ||
t.numAttrs&isNegative > 0 || t.numAttrs&numFloat > 0 {
return 0, false
}
n, err := strconv.ParseUint(t.str, 0, 64)
if err != nil {
return 0, false
}
return n, true
}
// Uint32 returns the uint32 value for a Scalar type.
func (t Token) Uint32() (uint32, bool) {
if t.kind != Scalar || t.attrs != numberValue ||
t.numAttrs&isNegative > 0 || t.numAttrs&numFloat > 0 {
return 0, false
}
n, err := strconv.ParseUint(t.str, 0, 32)
if err != nil {
return 0, false
}
return uint32(n), true
}
// Int64 returns the int64 value for a Scalar type.
func (t Token) Int64() (int64, bool) {
if t.kind != Scalar || t.attrs != numberValue || t.numAttrs&numFloat > 0 {
return 0, false
}
if n, err := strconv.ParseInt(t.str, 0, 64); err == nil {
return n, true
}
// C++ accepts large positive hex numbers as negative values.
// This feature is here for proto1 backwards compatibility purposes.
if flags.ProtoLegacy && (t.numAttrs == numHex) {
if n, err := strconv.ParseUint(t.str, 0, 64); err == nil {
return int64(n), true
}
}
return 0, false
}
// Int32 returns the int32 value for a Scalar type.
func (t Token) Int32() (int32, bool) {
if t.kind != Scalar || t.attrs != numberValue || t.numAttrs&numFloat > 0 {
return 0, false
}
if n, err := strconv.ParseInt(t.str, 0, 32); err == nil {
return int32(n), true
}
// C++ accepts large positive hex numbers as negative values.
// This feature is here for proto1 backwards compatibility purposes.
if flags.ProtoLegacy && (t.numAttrs == numHex) {
if n, err := strconv.ParseUint(t.str, 0, 32); err == nil {
return int32(n), true
}
}
return 0, false
}
// Float64 returns the float64 value for a Scalar type.
func (t Token) Float64() (float64, bool) {
if t.kind != Scalar {
return 0, false
}
switch t.attrs {
case literalValue:
if f, ok := floatLits[strings.ToLower(string(t.raw))]; ok {
return f, true
}
case numberValue:
n, err := strconv.ParseFloat(t.str, 64)
if err == nil {
return n, true
}
nerr := err.(*strconv.NumError)
if nerr.Err == strconv.ErrRange {
return n, true
}
}
return 0, false
}
// Float32 returns the float32 value for a Scalar type.
func (t Token) Float32() (float32, bool) {
if t.kind != Scalar {
return 0, false
}
switch t.attrs {
case literalValue:
if f, ok := floatLits[strings.ToLower(string(t.raw))]; ok {
return float32(f), true
}
case numberValue:
n, err := strconv.ParseFloat(t.str, 64)
if err == nil {
// Overflows are treated as (-)infinity.
return float32(n), true
}
nerr := err.(*strconv.NumError)
if nerr.Err == strconv.ErrRange {
return float32(n), true
}
}
return 0, false
}
// These are the supported float literals which C++ permits case-insensitive
// variants of these.
var floatLits = map[string]float64{
"nan": math.NaN(),
"inf": math.Inf(1),
"infinity": math.Inf(1),
"-inf": math.Inf(-1),
"-infinity": math.Inf(-1),
}
// TokenEquals returns true if given Tokens are equal, else false.
func TokenEquals(x, y Token) bool {
return x.kind == y.kind &&
x.attrs == y.attrs &&
x.numAttrs == y.numAttrs &&
x.pos == y.pos &&
bytes.Equal(x.raw, y.raw) &&
x.str == y.str
}

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
// Package text implements the text format for protocol buffers.
// This package has no semantic understanding for protocol buffers and is only
// a parser and composer for the format.
//
// There is no formal specification for the protobuf text format, as such the
// C++ implementation (see google::protobuf::TextFormat) is the reference
// implementation of the text format.
//
// This package is neither a superset nor a subset of the C++ implementation.
// This implementation permits a more liberal grammar in some cases to be
// backwards compatible with the historical Go implementation.
// Future parsings unique to Go should not be added.
// Some grammars allowed by the C++ implementation are deliberately
// not implemented here because they are considered a bug by the protobuf team
// and should not be replicated.
//
// The Go implementation should implement a sufficient amount of the C++
// grammar such that the default text serialization by C++ can be parsed by Go.
// However, just because the C++ parser accepts some input does not mean that
// the Go implementation should as well.
//
// The text format is almost a superset of JSON except:
// * message keys are not quoted strings, but identifiers
// * the top-level value must be a message without the delimiters
package text

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// Copyright 2018 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package text
import (
"math"
"math/bits"
"strconv"
"strings"
"unicode/utf8"
"google.golang.org/protobuf/internal/detrand"
"google.golang.org/protobuf/internal/errors"
)
// encType represents an encoding type.
type encType uint8
const (
_ encType = (1 << iota) / 2
name
scalar
messageOpen
messageClose
)
// Encoder provides methods to write out textproto constructs and values. The user is
// responsible for producing valid sequences of constructs and values.
type Encoder struct {
encoderState
indent string
newline string // set to "\n" if len(indent) > 0
delims [2]byte
outputASCII bool
}
type encoderState struct {
lastType encType
indents []byte
out []byte
}
// NewEncoder returns an Encoder.
//
// If indent is a non-empty string, it causes every entry in a List or Message
// to be preceded by the indent and trailed by a newline.
//
// If delims is not the zero value, it controls the delimiter characters used
// for messages (e.g., "{}" vs "<>").
//
// If outputASCII is true, strings will be serialized in such a way that
// multi-byte UTF-8 sequences are escaped. This property ensures that the
// overall output is ASCII (as opposed to UTF-8).
func NewEncoder(indent string, delims [2]byte, outputASCII bool) (*Encoder, error) {
e := &Encoder{}
if len(indent) > 0 {
if strings.Trim(indent, " \t") != "" {
return nil, errors.New("indent may only be composed of space and tab characters")
}
e.indent = indent
e.newline = "\n"
}
switch delims {
case [2]byte{0, 0}:
e.delims = [2]byte{'{', '}'}
case [2]byte{'{', '}'}, [2]byte{'<', '>'}:
e.delims = delims
default:
return nil, errors.New("delimiters may only be \"{}\" or \"<>\"")
}
e.outputASCII = outputASCII
return e, nil
}
// Bytes returns the content of the written bytes.
func (e *Encoder) Bytes() []byte {
return e.out
}
// StartMessage writes out the '{' or '<' symbol.
func (e *Encoder) StartMessage() {
e.prepareNext(messageOpen)
e.out = append(e.out, e.delims[0])
}
// EndMessage writes out the '}' or '>' symbol.
func (e *Encoder) EndMessage() {
e.prepareNext(messageClose)
e.out = append(e.out, e.delims[1])
}
// WriteName writes out the field name and the separator ':'.
func (e *Encoder) WriteName(s string) {
e.prepareNext(name)
e.out = append(e.out, s...)
e.out = append(e.out, ':')
}
// WriteBool writes out the given boolean value.
func (e *Encoder) WriteBool(b bool) {
if b {
e.WriteLiteral("true")
} else {
e.WriteLiteral("false")
}
}
// WriteString writes out the given string value.
func (e *Encoder) WriteString(s string) {
e.prepareNext(scalar)
e.out = appendString(e.out, s, e.outputASCII)
}
func appendString(out []byte, in string, outputASCII bool) []byte {
out = append(out, '"')
i := indexNeedEscapeInString(in)
in, out = in[i:], append(out, in[:i]...)
for len(in) > 0 {
switch r, n := utf8.DecodeRuneInString(in); {
case r == utf8.RuneError && n == 1:
// We do not report invalid UTF-8 because strings in the text format
// are used to represent both the proto string and bytes type.
r = rune(in[0])
fallthrough
case r < ' ' || r == '"' || r == '\\':
out = append(out, '\\')
switch r {
case '"', '\\':
out = append(out, byte(r))
case '\n':
out = append(out, 'n')
case '\r':
out = append(out, 'r')
case '\t':
out = append(out, 't')
default:
out = append(out, 'x')
out = append(out, "00"[1+(bits.Len32(uint32(r))-1)/4:]...)
out = strconv.AppendUint(out, uint64(r), 16)
}
in = in[n:]
case outputASCII && r >= utf8.RuneSelf:
out = append(out, '\\')
if r <= math.MaxUint16 {
out = append(out, 'u')
out = append(out, "0000"[1+(bits.Len32(uint32(r))-1)/4:]...)
out = strconv.AppendUint(out, uint64(r), 16)
} else {
out = append(out, 'U')
out = append(out, "00000000"[1+(bits.Len32(uint32(r))-1)/4:]...)
out = strconv.AppendUint(out, uint64(r), 16)
}
in = in[n:]
default:
i := indexNeedEscapeInString(in[n:])
in, out = in[n+i:], append(out, in[:n+i]...)
}
}
out = append(out, '"')
return out
}
// indexNeedEscapeInString returns the index of the character that needs
// escaping. If no characters need escaping, this returns the input length.
func indexNeedEscapeInString(s string) int {
for i := 0; i < len(s); i++ {
if c := s[i]; c < ' ' || c == '"' || c == '\'' || c == '\\' || c >= utf8.RuneSelf {
return i
}
}
return len(s)
}
// WriteFloat writes out the given float value for given bitSize.
func (e *Encoder) WriteFloat(n float64, bitSize int) {
e.prepareNext(scalar)
e.out = appendFloat(e.out, n, bitSize)
}
func appendFloat(out []byte, n float64, bitSize int) []byte {
switch {
case math.IsNaN(n):
return append(out, "nan"...)
case math.IsInf(n, +1):
return append(out, "inf"...)
case math.IsInf(n, -1):
return append(out, "-inf"...)
default:
return strconv.AppendFloat(out, n, 'g', -1, bitSize)
}
}
// WriteInt writes out the given signed integer value.
func (e *Encoder) WriteInt(n int64) {
e.prepareNext(scalar)
e.out = append(e.out, strconv.FormatInt(n, 10)...)
}
// WriteUint writes out the given unsigned integer value.
func (e *Encoder) WriteUint(n uint64) {
e.prepareNext(scalar)
e.out = append(e.out, strconv.FormatUint(n, 10)...)
}
// WriteLiteral writes out the given string as a literal value without quotes.
// This is used for writing enum literal strings.
func (e *Encoder) WriteLiteral(s string) {
e.prepareNext(scalar)
e.out = append(e.out, s...)
}
// prepareNext adds possible space and indentation for the next value based
// on last encType and indent option. It also updates e.lastType to next.
func (e *Encoder) prepareNext(next encType) {
defer func() {
e.lastType = next
}()
// Single line.
if len(e.indent) == 0 {
// Add space after each field before the next one.
if e.lastType&(scalar|messageClose) != 0 && next == name {
e.out = append(e.out, ' ')
// Add a random extra space to make output unstable.
if detrand.Bool() {
e.out = append(e.out, ' ')
}
}
return
}
// Multi-line.
switch {
case e.lastType == name:
e.out = append(e.out, ' ')
// Add a random extra space after name: to make output unstable.
if detrand.Bool() {
e.out = append(e.out, ' ')
}
case e.lastType == messageOpen && next != messageClose:
e.indents = append(e.indents, e.indent...)
e.out = append(e.out, '\n')
e.out = append(e.out, e.indents...)
case e.lastType&(scalar|messageClose) != 0:
if next == messageClose {
e.indents = e.indents[:len(e.indents)-len(e.indent)]
}
e.out = append(e.out, '\n')
e.out = append(e.out, e.indents...)
}
}
// Snapshot returns the current snapshot for use in Reset.
func (e *Encoder) Snapshot() encoderState {
return e.encoderState
}
// Reset resets the Encoder to the given encoderState from a Snapshot.
func (e *Encoder) Reset(es encoderState) {
e.encoderState = es
}