1 files changed, 0 insertions, 333 deletions
diff --git a/vendor/github.com/dsoprea/go-exif/v3/exif.go b/vendor/github.com/dsoprea/go-exif/v3/exif.go
deleted file mode 100644
index f66e839d9..000000000
--- a/vendor/github.com/dsoprea/go-exif/v3/exif.go
+++ /dev/null
@@ -1,333 +0,0 @@
-package exif
-
-import (
-	"bufio"
-	"bytes"
-	"errors"
-	"fmt"
-	"io"
-	"os"
-
-	"encoding/binary"
-	"io/ioutil"
-
-	"github.com/dsoprea/go-logging"
-
-	"github.com/dsoprea/go-exif/v3/common"
-)
-
-const (
-	// ExifAddressableAreaStart is the absolute offset in the file that all
-	// offsets are relative to.
-	ExifAddressableAreaStart = uint32(0x0)
-
-	// ExifDefaultFirstIfdOffset is essentially the number of bytes in addition
-	// to `ExifAddressableAreaStart` that you have to move in order to escape
-	// the rest of the header and get to the earliest point where we can put
-	// stuff (which has to be the first IFD). This is the size of the header
-	// sequence containing the two-character byte-order, two-character fixed-
-	// bytes, and the four bytes describing the first-IFD offset.
-	ExifDefaultFirstIfdOffset = uint32(2 + 2 + 4)
-)
-
-const (
-	// ExifSignatureLength is the number of bytes in the EXIF signature (which
-	// customarily includes the first IFD offset).
-	ExifSignatureLength = 8
-)
-
-var (
-	exifLogger = log.NewLogger("exif.exif")
-
-	ExifBigEndianSignature    = [4]byte{'M', 'M', 0x00, 0x2a}
-	ExifLittleEndianSignature = [4]byte{'I', 'I', 0x2a, 0x00}
-)
-
-var (
-	ErrNoExif          = errors.New("no exif data")
-	ErrExifHeaderError = errors.New("exif header error")
-)
-
-// SearchAndExtractExif searches for an EXIF blob in the byte-slice.
-func SearchAndExtractExif(data []byte) (rawExif []byte, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	b := bytes.NewBuffer(data)
-
-	rawExif, err = SearchAndExtractExifWithReader(b)
-	if err != nil {
-		if err == ErrNoExif {
-			return nil, err
-		}
-
-		log.Panic(err)
-	}
-
-	return rawExif, nil
-}
-
-// SearchAndExtractExifN searches for an EXIF blob in the byte-slice, but skips
-// the given number of EXIF blocks first. This is a forensics tool that helps
-// identify multiple EXIF blocks in a file.
-func SearchAndExtractExifN(data []byte, n int) (rawExif []byte, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	skips := 0
-	totalDiscarded := 0
-	for {
-		b := bytes.NewBuffer(data)
-
-		var discarded int
-
-		rawExif, discarded, err = searchAndExtractExifWithReaderWithDiscarded(b)
-		if err != nil {
-			if err == ErrNoExif {
-				return nil, err
-			}
-
-			log.Panic(err)
-		}
-
-		exifLogger.Debugf(nil, "Read EXIF block (%d).", skips)
-
-		totalDiscarded += discarded
-
-		if skips >= n {
-			exifLogger.Debugf(nil, "Reached requested EXIF block (%d).", n)
-			break
-		}
-
-		nextOffset := discarded + 1
-		exifLogger.Debugf(nil, "Skipping EXIF block (%d) by seeking to position (%d).", skips, nextOffset)
-
-		data = data[nextOffset:]
-		skips++
-	}
-
-	exifLogger.Debugf(nil, "Found EXIF blob (%d) bytes from initial position.", totalDiscarded)
-	return rawExif, nil
-}
-
-// searchAndExtractExifWithReaderWithDiscarded searches for an EXIF blob using
-// an `io.Reader`. We can't know how much long the EXIF data is without parsing
-// it, so this will likely grab up a lot of the image-data, too.
-//
-// This function returned the count of preceding bytes.
-func searchAndExtractExifWithReaderWithDiscarded(r io.Reader) (rawExif []byte, discarded int, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	// Search for the beginning of the EXIF information. The EXIF is near the
-	// beginning of most JPEGs, so this likely doesn't have a high cost (at
-	// least, again, with JPEGs).
-
-	br := bufio.NewReader(r)
-
-	for {
-		window, err := br.Peek(ExifSignatureLength)
-		if err != nil {
-			if err == io.EOF {
-				return nil, 0, ErrNoExif
-			}
-
-			log.Panic(err)
-		}
-
-		_, err = ParseExifHeader(window)
-		if err != nil {
-			if log.Is(err, ErrNoExif) == true {
-				// No EXIF. Move forward by one byte.
-
-				_, err := br.Discard(1)
-				log.PanicIf(err)
-
-				discarded++
-
-				continue
-			}
-
-			// Some other error.
-			log.Panic(err)
-		}
-
-		break
-	}
-
-	exifLogger.Debugf(nil, "Found EXIF blob (%d) bytes from initial position.", discarded)
-
-	rawExif, err = ioutil.ReadAll(br)
-	log.PanicIf(err)
-
-	return rawExif, discarded, nil
-}
-
-// RELEASE(dustin): We should replace the implementation of SearchAndExtractExifWithReader with searchAndExtractExifWithReaderWithDiscarded and drop the latter.
-
-// SearchAndExtractExifWithReader searches for an EXIF blob using an
-// `io.Reader`. We can't know how much long the EXIF data is without parsing it,
-// so this will likely grab up a lot of the image-data, too.
-func SearchAndExtractExifWithReader(r io.Reader) (rawExif []byte, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	rawExif, _, err = searchAndExtractExifWithReaderWithDiscarded(r)
-	if err != nil {
-		if err == ErrNoExif {
-			return nil, err
-		}
-
-		log.Panic(err)
-	}
-
-	return rawExif, nil
-}
-
-// SearchFileAndExtractExif returns a slice from the beginning of the EXIF data
-// to the end of the file (it's not practical to try and calculate where the
-// data actually ends).
-func SearchFileAndExtractExif(filepath string) (rawExif []byte, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	// Open the file.
-
-	f, err := os.Open(filepath)
-	log.PanicIf(err)
-
-	defer f.Close()
-
-	rawExif, err = SearchAndExtractExifWithReader(f)
-	log.PanicIf(err)
-
-	return rawExif, nil
-}
-
-type ExifHeader struct {
-	ByteOrder      binary.ByteOrder
-	FirstIfdOffset uint32
-}
-
-func (eh ExifHeader) String() string {
-	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.
-//
-// This will panic with ErrNoExif on any data errors so that we can double as
-// an EXIF-detection routine.
-func ParseExifHeader(data []byte) (eh ExifHeader, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	// Good reference:
-	//
-	//      CIPA DC-008-2016; JEITA CP-3451D
-	//      -> http://www.cipa.jp/std/documents/e/DC-008-Translation-2016-E.pdf
-
-	if len(data) < ExifSignatureLength {
-		exifLogger.Warningf(nil, "Not enough data for EXIF header: (%d)", len(data))
-		return eh, ErrNoExif
-	}
-
-	if bytes.Equal(data[:4], ExifBigEndianSignature[:]) == true {
-		exifLogger.Debugf(nil, "Byte-order is big-endian.")
-		eh.ByteOrder = binary.BigEndian
-	} else if bytes.Equal(data[:4], ExifLittleEndianSignature[:]) == true {
-		eh.ByteOrder = binary.LittleEndian
-		exifLogger.Debugf(nil, "Byte-order is little-endian.")
-	} else {
-		return eh, ErrNoExif
-	}
-
-	eh.FirstIfdOffset = eh.ByteOrder.Uint32(data[4:8])
-
-	return eh, nil
-}
-
-// Visit recursively invokes a callback for every tag.
-func Visit(rootIfdIdentity *exifcommon.IfdIdentity, ifdMapping *exifcommon.IfdMapping, tagIndex *TagIndex, exifData []byte, visitor TagVisitorFn, so *ScanOptions) (eh ExifHeader, furthestOffset uint32, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	eh, err = ParseExifHeader(exifData)
-	log.PanicIf(err)
-
-	ebs := NewExifReadSeekerWithBytes(exifData)
-	ie := NewIfdEnumerate(ifdMapping, tagIndex, ebs, eh.ByteOrder)
-
-	_, err = ie.Scan(rootIfdIdentity, eh.FirstIfdOffset, visitor, so)
-	log.PanicIf(err)
-
-	furthestOffset = ie.FurthestOffset()
-
-	return eh, furthestOffset, nil
-}
-
-// Collect recursively builds a static structure of all IFDs and tags.
-func Collect(ifdMapping *exifcommon.IfdMapping, tagIndex *TagIndex, exifData []byte) (eh ExifHeader, index IfdIndex, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	eh, err = ParseExifHeader(exifData)
-	log.PanicIf(err)
-
-	ebs := NewExifReadSeekerWithBytes(exifData)
-	ie := NewIfdEnumerate(ifdMapping, tagIndex, ebs, eh.ByteOrder)
-
-	index, err = ie.Collect(eh.FirstIfdOffset)
-	log.PanicIf(err)
-
-	return eh, index, nil
-}
-
-// BuildExifHeader constructs the bytes that go at the front of the stream.
-func BuildExifHeader(byteOrder binary.ByteOrder, firstIfdOffset uint32) (headerBytes []byte, err error) {
-	defer func() {
-		if state := recover(); state != nil {
-			err = log.Wrap(state.(error))
-		}
-	}()
-
-	b := new(bytes.Buffer)
-
-	var signatureBytes []byte
-	if byteOrder == binary.BigEndian {
-		signatureBytes = ExifBigEndianSignature[:]
-	} else {
-		signatureBytes = ExifLittleEndianSignature[:]
-	}
-
-	_, err = b.Write(signatureBytes)
-	log.PanicIf(err)
-
-	err = binary.Write(b, byteOrder, firstIfdOffset)
-	log.PanicIf(err)
-
-	return b.Bytes(), nil
-}