/usr/share/gocode/src/github.com/google/cups-connector/snmp/oid/oid.go is in google-cloud-print-connector 0.0~git20151105.24.1902938-2.
This file is owned by root:root, with mode 0o644.
The actual contents of the file can be viewed below.
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Copyright 2015 Google Inc. All rights reserved.
Use of this source code is governed by a BSD-style
license that can be found in the LICENSE file or at
https://developers.google.com/open-source/licenses/bsd
*/
// Package oid implements SNMP OID and related data structures.
package oid
import (
"fmt"
"sort"
"strings"
)
// OID reprents a numeric object ID.
type OID []uint
// AsString formats the OID as a string.
func (o OID) AsString() string {
q := make([]string, len(o))
for i := range o {
q[i] = fmt.Sprintf("%d", o[i])
}
return strings.Join(q, ".")
}
// HasPrefix answers the question "does this OID have this prefix?"
func (a OID) HasPrefix(b OID) bool {
if len(a) < len(b) {
return false
}
for i := 0; i < len(b); i++ {
if a[i] != b[i] {
return false
}
}
return true
}
// IsEqualTo checks whether this OID == that OID.
func (a OID) IsEqualTo(b OID) bool {
if len(a) != len(b) {
return false
}
for i := 0; i < len(a); i++ {
if a[i] != b[i] {
return false
}
}
return true
}
// ComesBefore answers the question "does this OID sort before that OID?"
func (a OID) ComesBefore(b OID) bool {
var size int
if len(a) < len(b) {
size = len(a)
} else {
size = len(b)
}
for i := 0; i < size; i++ {
if a[i] < b[i] {
return true
}
if a[i] > b[i] {
return false
}
}
if len(a) < len(b) {
return true
}
return false
}
// Variable represents an OID name:value pair.
type Variable struct {
Name OID
Value string
}
// NameAsString formats OID.Name as a string.
func (v *Variable) NameAsString() string {
return v.Name.AsString()
}
// VariableSet represents an ordered set of OID variables.
type VariableSet struct {
vars []Variable
}
// Size gets the current size of this set.
func (vs *VariableSet) Size() int {
return len(vs.vars)
}
// Returns the variables in this set.
func (vs *VariableSet) Variables() []Variable {
return vs.vars
}
// AddVariable adds a variable to this set.
func (vs *VariableSet) AddVariable(name OID, value string) {
if strings.HasPrefix(value, "\"") && strings.HasSuffix(value, "\"") {
value = value[1 : len(value)-1]
}
vs.vars = append(vs.vars, Variable{name, value})
}
// GetSubtree gets the subtree of variables whose OID name has prefix.
func (vs *VariableSet) GetSubtree(prefix OID) *VariableSet {
head := sort.Search(len(vs.vars), func(i int) bool { return !vs.vars[i].Name.ComesBefore(prefix) })
tail := head
for tail < len(vs.vars) && vs.vars[tail].Name.HasPrefix(prefix) {
tail++
}
return &VariableSet{vs.vars[head:tail]}
}
// GetValues gets all values in this set.
func (vs *VariableSet) GetValues() []string {
values := make([]string, len(vs.vars))
for i := range vs.vars {
values[i] = vs.vars[i].Value
}
return values
}
// GetVariable gets a single variable, by OID.
func (vs *VariableSet) GetVariable(o OID) (*Variable, bool) {
subtree := vs.GetSubtree(o)
if len(subtree.vars) > 0 && subtree.vars[0].Name.IsEqualTo(o) {
return &subtree.vars[0], true
}
return nil, false
}
// GetValue gets the value of a single variable, by OID.
func (vs *VariableSet) GetValue(o OID) (string, bool) {
if v, exists := vs.GetVariable(o); exists {
return v.Value, true
}
return "", false
}
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