[VOL-4291] OfAgent changes for gRPC migration
Change-Id: I8da1db6df49d478ef24ec8f9bd719e9692f48a7f
diff --git a/vendor/google.golang.org/protobuf/internal/errors/errors.go b/vendor/google.golang.org/protobuf/internal/errors/errors.go
new file mode 100644
index 0000000..20c17b3
--- /dev/null
+++ b/vendor/google.golang.org/protobuf/internal/errors/errors.go
@@ -0,0 +1,89 @@
+// 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 errors implements functions to manipulate errors.
+package errors
+
+import (
+ "errors"
+ "fmt"
+
+ "google.golang.org/protobuf/internal/detrand"
+)
+
+// Error is a sentinel matching all errors produced by this package.
+var Error = errors.New("protobuf error")
+
+// New formats a string according to the format specifier and arguments and
+// returns an error that has a "proto" prefix.
+func New(f string, x ...interface{}) error {
+ return &prefixError{s: format(f, x...)}
+}
+
+type prefixError struct{ s string }
+
+var prefix = func() string {
+ // Deliberately introduce instability into the error message string to
+ // discourage users from performing error string comparisons.
+ if detrand.Bool() {
+ return "proto: " // use non-breaking spaces (U+00a0)
+ } else {
+ return "proto: " // use regular spaces (U+0020)
+ }
+}()
+
+func (e *prefixError) Error() string {
+ return prefix + e.s
+}
+
+func (e *prefixError) Unwrap() error {
+ return Error
+}
+
+// Wrap returns an error that has a "proto" prefix, the formatted string described
+// by the format specifier and arguments, and a suffix of err. The error wraps err.
+func Wrap(err error, f string, x ...interface{}) error {
+ return &wrapError{
+ s: format(f, x...),
+ err: err,
+ }
+}
+
+type wrapError struct {
+ s string
+ err error
+}
+
+func (e *wrapError) Error() string {
+ return format("%v%v: %v", prefix, e.s, e.err)
+}
+
+func (e *wrapError) Unwrap() error {
+ return e.err
+}
+
+func (e *wrapError) Is(target error) bool {
+ return target == Error
+}
+
+func format(f string, x ...interface{}) string {
+ // avoid "proto: " prefix when chaining
+ for i := 0; i < len(x); i++ {
+ switch e := x[i].(type) {
+ case *prefixError:
+ x[i] = e.s
+ case *wrapError:
+ x[i] = format("%v: %v", e.s, e.err)
+ }
+ }
+ return fmt.Sprintf(f, x...)
+}
+
+func InvalidUTF8(name string) error {
+ return New("field %v contains invalid UTF-8", name)
+}
+
+func RequiredNotSet(name string) error {
+ return New("required field %v not set", name)
+}