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Go: documentation cleanup

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This commit is contained in:
Přemysl Eric Janouch 2018-10-04 13:11:10 +02:00
parent 9ac8360979
commit 62206ed344
Signed by: p
GPG Key ID: A0420B94F92B9493
1 changed files with 16 additions and 18 deletions
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34
pdf/pdf.go
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@ -68,16 +68,11 @@ const (
type Object struct {
Kind ObjectKind
// Comment/Keyword/Name/String
String string
// Bool, Numeric
Number float64
// Array, Indirect
Array []Object
// Dict, in the future also Stream
Dict map[string]Object
// Indirect, Reference
N, Generation uint
String string // Comment/Keyword/Name/String
Number float64 // Bool, Numeric
Array []Object // Array, Indirect
Dict map[string]Object // Dict, in the future also Stream
N, Generation uint // Indirect, Reference
}
// IsInteger checks if the PDF object is an integer number.
@ -93,9 +88,11 @@ func (o *Object) IsUint() bool {
// A slew of constructors that will hopefully get all inlined.
// New returns a new Object of the given kind, with default values.
func New(kind ObjectKind) Object { return Object{Kind: kind} }
func NewComment(c string) Object { return Object{Kind: Comment, String: c} }
func NewKeyword(k string) Object { return Object{Kind: Keyword, String: k} }
func New(kind ObjectKind) Object { return Object{Kind: kind} }
func NewBool(b bool) Object {
var b64 float64
@ -884,8 +881,8 @@ func NewDate(ts time.Time) Object {
}
// GetFirstPage retrieves the first page of the document or a Nil object.
func GetFirstPage(pdf *Updater, nodeN, nodeGeneration uint) Object {
obj, _ := pdf.Get(nodeN, nodeGeneration)
func (u *Updater) GetFirstPage(nodeN, nodeGeneration uint) Object {
obj, _ := u.Get(nodeN, nodeGeneration)
if obj.Kind != Dict {
return New(Nil)
}
@ -912,7 +909,7 @@ func GetFirstPage(pdf *Updater, nodeN, nodeGeneration uint) Object {
}
// XXX: Nothing prevents us from recursing in an evil circular graph.
return GetFirstPage(pdf, kids.Array[0].N, kids.Array[0].Generation)
return u.GetFirstPage(kids.Array[0].N, kids.Array[0].Generation)
}
// -----------------------------------------------------------------------------
@ -1009,8 +1006,9 @@ func PKCS12Parse(p12 []byte, password string) (
// FillInSignature signs PDF contents and writes the signature into the given
// window that has been reserved for this specific purpose.
// This is a very low-level function.
func FillInSignature(document []byte, signOff, signLen int,
key crypto.PublicKey, certs []*x509.Certificate) error {
key crypto.PrivateKey, certs []*x509.Certificate) error {
if signOff < 0 || signOff > len(document) ||
signLen < 2 || signOff+signLen > len(document) {
return errors.New("invalid signing window")
@ -1095,8 +1093,8 @@ func FillInSignature(document []byte, signOff, signLen int,
//
// Carelessly assumes that the version of the original document is at most
// PDF 1.6.
func Sign(document []byte, key crypto.PrivateKey, certs []*x509.Certificate) (
[]byte, error) {
func Sign(document []byte,
key crypto.PrivateKey, certs []*x509.Certificate) ([]byte, error) {
pdf := &Updater{Document: document}
if err := pdf.Initialize(); err != nil {
return nil, err
@ -1160,7 +1158,7 @@ func Sign(document []byte, key crypto.PrivateKey, certs []*x509.Certificate) (
if !ok || pagesRef.Kind != Reference {
return nil, errors.New("invalid Pages reference")
}
page := GetFirstPage(pdf, pagesRef.N, pagesRef.Generation)
page := pdf.GetFirstPage(pagesRef.N, pagesRef.Generation)
if page.Kind != Dict {
return nil, errors.New("invalid or unsupported page tree")
}