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go-exif
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exif: Added function descriptions.

pull/3/head
Dustin Oprea 2018-05-01 10:18:52 -04:00
parent 2fca65a8ea
commit 98620a7d84
1 changed files with 4 additions and 1 deletions
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5
exif.go
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@ -112,7 +112,7 @@ func (eh ExifHeader) String() string {
return fmt.Sprintf("ExifHeader<BYTE-ORDER=[%v] FIRST-IFD-OFFSET=(0x%02x)>", eh.ByteOrder, eh.FirstIfdOffset) return fmt.Sprintf("ExifHeader<BYTE-ORDER=[%v] FIRST-IFD-OFFSET=(0x%02x)>", eh.ByteOrder, eh.FirstIfdOffset)
} }
// ParseExifHeader parses the bytes at the very top of the header.
func (e *Exif) ParseExifHeader(data []byte) (eh ExifHeader, err error) { func (e *Exif) ParseExifHeader(data []byte) (eh ExifHeader, err error) {
defer func() { defer func() {
if state := recover(); state != nil { if state := recover(); state != nil {
@ -159,6 +159,7 @@ func (e *Exif) ParseExifHeader(data []byte) (eh ExifHeader, err error) {
return eh, nil return eh, nil
} }
// Visit recursively invokes a callback for every tag.
func (e *Exif) Visit(exifData []byte, visitor TagVisitor) (eh ExifHeader, err error) { func (e *Exif) Visit(exifData []byte, visitor TagVisitor) (eh ExifHeader, err error) {
defer func() { defer func() {
if state := recover(); state != nil { if state := recover(); state != nil {
@ -177,6 +178,7 @@ func (e *Exif) Visit(exifData []byte, visitor TagVisitor) (eh ExifHeader, err er
return eh, nil return eh, nil
} }
// Collect recursively builds a static structure of all IFDs and tags.
func (e *Exif) Collect(exifData []byte) (eh ExifHeader, index IfdIndex, err error) { func (e *Exif) Collect(exifData []byte) (eh ExifHeader, index IfdIndex, err error) {
defer func() { defer func() {
if state := recover(); state != nil { if state := recover(); state != nil {
@ -195,6 +197,7 @@ func (e *Exif) Collect(exifData []byte) (eh ExifHeader, index IfdIndex, err erro
return eh, index, nil return eh, index, nil
} }
// BuildExifHeader constructs the bytes that go in the very beginning.
func BuildExifHeader(byteOrder binary.ByteOrder, firstIfdOffset uint32) (headerBytes []byte, err error) { func BuildExifHeader(byteOrder binary.ByteOrder, firstIfdOffset uint32) (headerBytes []byte, err error) {
defer func() { defer func() {
if state := recover(); state != nil { if state := recover(); state != nil {