1 files changed, 0 insertions, 147 deletions
diff --git a/vendor/go.opencensus.io/trace/tracestate/tracestate.go b/vendor/go.opencensus.io/trace/tracestate/tracestate.go
deleted file mode 100644
index 2d6c713..0000000
--- a/vendor/go.opencensus.io/trace/tracestate/tracestate.go
+++ /dev/null
@@ -1,147 +0,0 @@
-// Copyright 2018, OpenCensus Authors
-//
-// Licensed under the Apache License, Version 2.0 (the "License");
-// you may not use this file except in compliance with the License.
-// You may obtain a copy of the License at
-//
-//     http://www.apache.org/licenses/LICENSE-2.0
-//
-// Unless required by applicable law or agreed to in writing, software
-// distributed under the License is distributed on an "AS IS" BASIS,
-// WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
-// See the License for the specific language governing permissions and
-// limitations under the License.
-
-// Package tracestate implements support for the Tracestate header of the
-// W3C TraceContext propagation format.
-package tracestate
-
-import (
-	"fmt"
-	"regexp"
-)
-
-const (
-	keyMaxSize       = 256
-	valueMaxSize     = 256
-	maxKeyValuePairs = 32
-)
-
-const (
-	keyWithoutVendorFormat = `[a-z][_0-9a-z\-\*\/]{0,255}`
-	keyWithVendorFormat    = `[a-z][_0-9a-z\-\*\/]{0,240}@[a-z][_0-9a-z\-\*\/]{0,13}`
-	keyFormat              = `(` + keyWithoutVendorFormat + `)|(` + keyWithVendorFormat + `)`
-	valueFormat            = `[\x20-\x2b\x2d-\x3c\x3e-\x7e]{0,255}[\x21-\x2b\x2d-\x3c\x3e-\x7e]`
-)
-
-var keyValidationRegExp = regexp.MustCompile(`^(` + keyFormat + `)$`)
-var valueValidationRegExp = regexp.MustCompile(`^(` + valueFormat + `)$`)
-
-// Tracestate represents tracing-system specific context in a list of key-value pairs. Tracestate allows different
-// vendors propagate additional information and inter-operate with their legacy Id formats.
-type Tracestate struct {
-	entries []Entry
-}
-
-// Entry represents one key-value pair in a list of key-value pair of Tracestate.
-type Entry struct {
-	// Key is an opaque string up to 256 characters printable. It MUST begin with a lowercase letter,
-	// and can only contain lowercase letters a-z, digits 0-9, underscores _, dashes -, asterisks *, and
-	// forward slashes /.
-	Key string
-
-	// Value is an opaque string up to 256 characters printable ASCII RFC0020 characters (i.e., the
-	// range 0x20 to 0x7E) except comma , and =.
-	Value string
-}
-
-// Entries returns a slice of Entry.
-func (ts *Tracestate) Entries() []Entry {
-	if ts == nil {
-		return nil
-	}
-	return ts.entries
-}
-
-func (ts *Tracestate) remove(key string) *Entry {
-	for index, entry := range ts.entries {
-		if entry.Key == key {
-			ts.entries = append(ts.entries[:index], ts.entries[index+1:]...)
-			return &entry
-		}
-	}
-	return nil
-}
-
-func (ts *Tracestate) add(entries []Entry) error {
-	for _, entry := range entries {
-		ts.remove(entry.Key)
-	}
-	if len(ts.entries)+len(entries) > maxKeyValuePairs {
-		return fmt.Errorf("adding %d key-value pairs to current %d pairs exceeds the limit of %d",
-			len(entries), len(ts.entries), maxKeyValuePairs)
-	}
-	ts.entries = append(entries, ts.entries...)
-	return nil
-}
-
-func isValid(entry Entry) bool {
-	return keyValidationRegExp.MatchString(entry.Key) &&
-		valueValidationRegExp.MatchString(entry.Value)
-}
-
-func containsDuplicateKey(entries ...Entry) (string, bool) {
-	keyMap := make(map[string]int)
-	for _, entry := range entries {
-		if _, ok := keyMap[entry.Key]; ok {
-			return entry.Key, true
-		}
-		keyMap[entry.Key] = 1
-	}
-	return "", false
-}
-
-func areEntriesValid(entries ...Entry) (*Entry, bool) {
-	for _, entry := range entries {
-		if !isValid(entry) {
-			return &entry, false
-		}
-	}
-	return nil, true
-}
-
-// New creates a Tracestate object from a parent and/or entries (key-value pair).
-// Entries from the parent are copied if present. The entries passed to this function
-// are inserted in front of those copied from the parent. If an entry copied from the
-// parent contains the same key as one of the entry in entries then the entry copied
-// from the parent is removed. See add func.
-//
-// An error is returned with nil Tracestate if
-//  1. one or more entry in entries is invalid.
-//  2. two or more entries in the input entries have the same key.
-//  3. the number of entries combined from the parent and the input entries exceeds maxKeyValuePairs.
-//     (duplicate entry is counted only once).
-func New(parent *Tracestate, entries ...Entry) (*Tracestate, error) {
-	if parent == nil && len(entries) == 0 {
-		return nil, nil
-	}
-	if entry, ok := areEntriesValid(entries...); !ok {
-		return nil, fmt.Errorf("key-value pair {%s, %s} is invalid", entry.Key, entry.Value)
-	}
-
-	if key, duplicate := containsDuplicateKey(entries...); duplicate {
-		return nil, fmt.Errorf("contains duplicate keys (%s)", key)
-	}
-
-	tracestate := Tracestate{}
-
-	if parent != nil && len(parent.entries) > 0 {
-		tracestate.entries = append([]Entry{}, parent.entries...)
-	}
-
-	err := tracestate.add(entries)
-	if err != nil {
-		return nil, err
-	}
-	return &tracestate, nil
-}