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Diffstat (limited to 'vendor/github.com/dsoprea/go-exif/v2/utility.go')
-rw-r--r--vendor/github.com/dsoprea/go-exif/v2/utility.go233
1 files changed, 0 insertions, 233 deletions
diff --git a/vendor/github.com/dsoprea/go-exif/v2/utility.go b/vendor/github.com/dsoprea/go-exif/v2/utility.go
deleted file mode 100644
index ad692477e..000000000
--- a/vendor/github.com/dsoprea/go-exif/v2/utility.go
+++ /dev/null
@@ -1,233 +0,0 @@
-package exif
-
-import (
- "fmt"
- "math"
- "reflect"
- "strconv"
- "strings"
- "time"
-
- "github.com/dsoprea/go-logging"
-
- "github.com/dsoprea/go-exif/v2/common"
- "github.com/dsoprea/go-exif/v2/undefined"
-)
-
-var (
- utilityLogger = log.NewLogger("exif.utility")
-)
-
-var (
- timeType = reflect.TypeOf(time.Time{})
-)
-
-// ParseExifFullTimestamp parses dates like "2018:11:30 13:01:49" into a UTC
-// `time.Time` struct.
-func ParseExifFullTimestamp(fullTimestampPhrase string) (timestamp time.Time, err error) {
- defer func() {
- if state := recover(); state != nil {
- err = log.Wrap(state.(error))
- }
- }()
-
- parts := strings.Split(fullTimestampPhrase, " ")
- datestampValue, timestampValue := parts[0], parts[1]
-
- // Normalize the separators.
- datestampValue = strings.ReplaceAll(datestampValue, "-", ":")
- timestampValue = strings.ReplaceAll(timestampValue, "-", ":")
-
- dateParts := strings.Split(datestampValue, ":")
-
- year, err := strconv.ParseUint(dateParts[0], 10, 16)
- if err != nil {
- log.Panicf("could not parse year")
- }
-
- month, err := strconv.ParseUint(dateParts[1], 10, 8)
- if err != nil {
- log.Panicf("could not parse month")
- }
-
- day, err := strconv.ParseUint(dateParts[2], 10, 8)
- if err != nil {
- log.Panicf("could not parse day")
- }
-
- timeParts := strings.Split(timestampValue, ":")
-
- hour, err := strconv.ParseUint(timeParts[0], 10, 8)
- if err != nil {
- log.Panicf("could not parse hour")
- }
-
- minute, err := strconv.ParseUint(timeParts[1], 10, 8)
- if err != nil {
- log.Panicf("could not parse minute")
- }
-
- second, err := strconv.ParseUint(timeParts[2], 10, 8)
- if err != nil {
- log.Panicf("could not parse second")
- }
-
- timestamp = time.Date(int(year), time.Month(month), int(day), int(hour), int(minute), int(second), 0, time.UTC)
- return timestamp, nil
-}
-
-// ExifFullTimestampString produces a string like "2018:11:30 13:01:49" from a
-// `time.Time` struct. It will attempt to convert to UTC first.
-func ExifFullTimestampString(t time.Time) (fullTimestampPhrase string) {
- return exifcommon.ExifFullTimestampString(t)
-}
-
-// ExifTag is one simple representation of a tag in a flat list of all of them.
-type ExifTag struct {
- // IfdPath is the fully-qualified IFD path (even though it is not named as
- // such).
- IfdPath string `json:"ifd_path"`
-
- // TagId is the tag-ID.
- TagId uint16 `json:"id"`
-
- // TagName is the tag-name. This is never empty.
- TagName string `json:"name"`
-
- // UnitCount is the recorded number of units constution of the value.
- UnitCount uint32 `json:"unit_count"`
-
- // TagTypeId is the type-ID.
- TagTypeId exifcommon.TagTypePrimitive `json:"type_id"`
-
- // TagTypeName is the type name.
- TagTypeName string `json:"type_name"`
-
- // Value is the decoded value.
- Value interface{} `json:"value"`
-
- // ValueBytes is the raw, encoded value.
- ValueBytes []byte `json:"value_bytes"`
-
- // Formatted is the human representation of the first value (tag values are
- // always an array).
- FormattedFirst string `json:"formatted_first"`
-
- // Formatted is the human representation of the complete value.
- Formatted string `json:"formatted"`
-
- // ChildIfdPath is the name of the child IFD this tag represents (if it
- // represents any). Otherwise, this is empty.
- ChildIfdPath string `json:"child_ifd_path"`
-}
-
-// String returns a string representation.
-func (et ExifTag) String() string {
- return fmt.Sprintf(
- "ExifTag<"+
- "IFD-PATH=[%s] "+
- "TAG-ID=(0x%02x) "+
- "TAG-NAME=[%s] "+
- "TAG-TYPE=[%s] "+
- "VALUE=[%v] "+
- "VALUE-BYTES=(%d) "+
- "CHILD-IFD-PATH=[%s]",
- et.IfdPath, et.TagId, et.TagName, et.TagTypeName, et.FormattedFirst,
- len(et.ValueBytes), et.ChildIfdPath)
-}
-
-// GetFlatExifData returns a simple, flat representation of all tags.
-func GetFlatExifData(exifData []byte) (exifTags []ExifTag, err error) {
- defer func() {
- if state := recover(); state != nil {
- err = log.Wrap(state.(error))
- }
- }()
-
- eh, err := ParseExifHeader(exifData)
- log.PanicIf(err)
-
- im := NewIfdMappingWithStandard()
- ti := NewTagIndex()
-
- ie := NewIfdEnumerate(im, ti, exifData, eh.ByteOrder)
-
- exifTags = make([]ExifTag, 0)
-
- visitor := func(fqIfdPath string, ifdIndex int, ite *IfdTagEntry) (err error) {
- // This encodes down to base64. Since this an example tool and we do not
- // expect to ever decode the output, we are not worried about
- // specifically base64-encoding it in order to have a measure of
- // control.
- valueBytes, err := ite.GetRawBytes()
- if err != nil {
- if err == exifundefined.ErrUnparseableValue {
- return nil
- }
-
- log.Panic(err)
- }
-
- value, err := ite.Value()
- if err != nil {
- if err == exifcommon.ErrUnhandledUndefinedTypedTag {
- value = exifundefined.UnparseableUnknownTagValuePlaceholder
- } else {
- log.Panic(err)
- }
- }
-
- et := ExifTag{
- IfdPath: fqIfdPath,
- TagId: ite.TagId(),
- TagName: ite.TagName(),
- UnitCount: ite.UnitCount(),
- TagTypeId: ite.TagType(),
- TagTypeName: ite.TagType().String(),
- Value: value,
- ValueBytes: valueBytes,
- ChildIfdPath: ite.ChildIfdPath(),
- }
-
- et.Formatted, err = ite.Format()
- log.PanicIf(err)
-
- et.FormattedFirst, err = ite.FormatFirst()
- log.PanicIf(err)
-
- exifTags = append(exifTags, et)
-
- return nil
- }
-
- _, err = ie.Scan(exifcommon.IfdStandardIfdIdentity, eh.FirstIfdOffset, visitor)
- log.PanicIf(err)
-
- return exifTags, nil
-}
-
-// GpsDegreesEquals returns true if the two `GpsDegrees` are identical.
-func GpsDegreesEquals(gi1, gi2 GpsDegrees) bool {
- if gi2.Orientation != gi1.Orientation {
- return false
- }
-
- degreesRightBound := math.Nextafter(gi1.Degrees, gi1.Degrees+1)
- minutesRightBound := math.Nextafter(gi1.Minutes, gi1.Minutes+1)
- secondsRightBound := math.Nextafter(gi1.Seconds, gi1.Seconds+1)
-
- if gi2.Degrees < gi1.Degrees || gi2.Degrees >= degreesRightBound {
- return false
- } else if gi2.Minutes < gi1.Minutes || gi2.Minutes >= minutesRightBound {
- return false
- } else if gi2.Seconds < gi1.Seconds || gi2.Seconds >= secondsRightBound {
- return false
- }
-
- return true
-}
-
-// IsTime returns true if the value is a `time.Time`.
-func IsTime(v interface{}) bool {
- return reflect.TypeOf(v) == timeType
-}