1 files changed, 119 insertions, 0 deletions
diff --git a/vendor/github.com/dsoprea/go-photoshop-info-format/info.go b/vendor/github.com/dsoprea/go-photoshop-info-format/info.go
new file mode 100644
index 000000000..7f17fa6c0
--- /dev/null
+++ b/vendor/github.com/dsoprea/go-photoshop-info-format/info.go
@@ -0,0 +1,119 @@
+package photoshopinfo
+
+import (
+	"fmt"
+	"io"
+
+	"encoding/binary"
+
+	"github.com/dsoprea/go-logging"
+)
+
+var (
+	defaultByteOrder = binary.BigEndian
+)
+
+// Photoshop30InfoRecord is the data for one parsed Photoshop-info record.
+type Photoshop30InfoRecord struct {
+	// RecordType is the record-type.
+	RecordType string
+
+	// ImageResourceId is the image resource-ID.
+	ImageResourceId uint16
+
+	// Name is the name of the record. It is optional and will be an empty-
+	// string if not present.
+	Name string
+
+	// Data is the raw record data.
+	Data []byte
+}
+
+// String returns a descriptive string.
+func (pir Photoshop30InfoRecord) String() string {
+	return fmt.Sprintf("RECORD-TYPE=[%s] IMAGE-RESOURCE-ID=[0x%04x] NAME=[%s] DATA-SIZE=(%d)", pir.RecordType, pir.ImageResourceId, pir.Name, len(pir.Data))
+}
+
+// ReadPhotoshop30InfoRecord parses a single photoshop-info record.
+func ReadPhotoshop30InfoRecord(r io.Reader) (pir Photoshop30InfoRecord, err error) {
+	defer func() {
+		if state := recover(); state != nil {
+			err = log.Wrap(state.(error))
+		}
+	}()
+
+	recordType := make([]byte, 4)
+	_, err = io.ReadFull(r, recordType)
+	if err != nil {
+		if err == io.EOF {
+			return pir, err
+		}
+
+		log.Panic(err)
+	}
+
+	// TODO(dustin): Move BigEndian to constant/config.
+
+	irId := uint16(0)
+	err = binary.Read(r, defaultByteOrder, &irId)
+	log.PanicIf(err)
+
+	nameSize := uint8(0)
+	err = binary.Read(r, defaultByteOrder, &nameSize)
+	log.PanicIf(err)
+
+	// Add an extra byte if the two length+data size is odd to make the total
+	// bytes read even.
+	doAddPadding := (1+nameSize)%2 == 1
+	if doAddPadding == true {
+		nameSize++
+	}
+
+	name := make([]byte, nameSize)
+	_, err = io.ReadFull(r, name)
+	log.PanicIf(err)
+
+	// If the last byte is padding, truncate it.
+	if doAddPadding == true {
+		name = name[:nameSize-1]
+	}
+
+	dataSize := uint32(0)
+	err = binary.Read(r, defaultByteOrder, &dataSize)
+	log.PanicIf(err)
+
+	data := make([]byte, dataSize+dataSize%2)
+	_, err = io.ReadFull(r, data)
+	log.PanicIf(err)
+
+	data = data[:dataSize]
+
+	pir = Photoshop30InfoRecord{
+		RecordType:      string(recordType),
+		ImageResourceId: irId,
+		Name:            string(name),
+		Data:            data,
+	}
+
+	return pir, nil
+}
+
+// ReadPhotoshop30Info parses a sequence of photoship-info records from the stream.
+func ReadPhotoshop30Info(r io.Reader) (pirIndex map[uint16]Photoshop30InfoRecord, err error) {
+	pirIndex = make(map[uint16]Photoshop30InfoRecord)
+
+	for {
+		pir, err := ReadPhotoshop30InfoRecord(r)
+		if err != nil {
+			if err == io.EOF {
+				break
+			}
+
+			log.Panic(err)
+		}
+
+		pirIndex[pir.ImageResourceId] = pir
+	}
+
+	return pirIndex, nil
+}