diff options
Diffstat (limited to 'vendor/github.com/dsoprea/go-exif/v2/utility.go')
-rw-r--r-- | vendor/github.com/dsoprea/go-exif/v2/utility.go | 233 |
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 -} |