tools

Documentation

Index

• Constants
• Variables
• func CheckSum(data []byte) uint32
• func CreateDir(path string, mode os.FileMode) error
• func CreateDirIfNotExists(path string, mode os.FileMode) error
• func CurrentDataCompactStr() string
• func CurrentDateInSeconds() int64
• func CurrentDateStr() string
• func CurrentDateTimeStr() string
• func CurrentTimeCompactStr() string
• func DaysBefore(days int) int64
• func Decode(jsonStr string, v interface{})
• func DecodeBytes(jsonBytes []byte, v interface{}) error
• func DecodeFile(file string, v interface{}) error
• func DeleteFile(path string) bool
• func DeleteFiles(path string) bool
• func Encode(v interface{}) string
• func EncodeBytes(v interface{}) []byte
• func EncodeObj(v interface{}, file string) error
• func FileCheckSum(file string) uint32
• func FileExists(path string) bool
• func Float32Round(f float32, pOffset int64) float32
• func GetTimeInSeconds(timeStr string) int64
• func HashUUID(bs []byte) string
• func ImagEmpty(a []uint8) float32
• func ImageColorId(im image.Image) uint64
• func ImageHashContentRate(a uint64) float32
• func ImageHashDiff(a, b uint64) float32
• func ImageHashId(im image.Image, bs []byte) (image.Image, image.Image, uint64, error)
• func ImageHashNull(a uint64) uint8
• func ImageMaskAllow(masks [][]float32, x, y int, w, h int) bool
• func ImagePixGray(im image.Image, x, y int) uint8
• func ImageSimilarity(a, b []uint8) float32
• func ImageTag(m image.Image, tagSpace int) []uint8
• func ImgBytesDecode(bs []byte) (image.Image, error)
• func ImgShmBytes(file string) ([]byte, error)
• func IsValidUUID(UUID string) bool
• func RandUUID() string
• func SplitSeconds(seconds int64) (int64, int64)
• func TimeRingFromDaysAgo(days int) *ring.Ring
• func TransTimeFormat(timeString string) string

Constants

const (
	AlgMd5    = 1
	AlgSha1   = 2
	AlgSha256 = 3
)

const (
	BoxSizeRateMin           float32 = 0.1
	ImageQueryBoxSizeRateMin float32 = 0.1
)

Variables

var Reader io.Reader

var UUIDRegexp = regexp.MustCompile(fmt.Sprintf("^[a-f0-9]{8}%c([a-f0-9]{4}%c){3}[a-f0-9]{12}$", uuidDash, uuidDash))

Functions

func CheckSum

func CheckSum(data []byte) uint32

compute checksum of input data.

func CreateDir

func CreateDir(path string, mode os.FileMode) error

create dir.

func CreateDirIfNotExists

func CreateDirIfNotExists(path string, mode os.FileMode) error

create dir if not exists.

func CurrentDataCompactStr

func CurrentDataCompactStr() string

CurrentDataCompactStr return current date in format yyyyMMdd

func CurrentDateInSeconds

func CurrentDateInSeconds() int64

CurrentDateInSeconds return the seconds representation of the current date in local

func CurrentDateStr

func CurrentDateStr() string

CurrentDateStr return current date in format yyyy-MM-dd

func CurrentDateTimeStr

func CurrentDateTimeStr() string

CurrentDateTimeStr return current datetime in format yyyy-MM-dd HH:mm:ss

func CurrentTimeCompactStr

func CurrentTimeCompactStr() string

CurrentTimeCompactStr return current time in format HHmmss

func DaysBefore

func DaysBefore(days int) int64

DaysBefore return the seconds representation of the start of days before now in local

func Decode

func Decode(jsonStr string, v interface{})

deserialize

func DecodeBytes

func DecodeBytes(jsonBytes []byte, v interface{}) error

deserialize

func DecodeFile

func DecodeFile(file string, v interface{}) error

deserialize file content.

func DeleteFile

func DeleteFile(path string) bool

remove file return false if failed.

func DeleteFiles

func DeleteFiles(path string) bool

remove dirs and files in path return false if failed.

func Encode

func Encode(v interface{}) string

serialize

func EncodeBytes

func EncodeBytes(v interface{}) []byte

serialize

func EncodeObj

func EncodeObj(v interface{}, file string) error

serialize object to file.

func FileCheckSum

func FileCheckSum(file string) uint32

compute checksum of the input file.

func FileExists

func FileExists(path string) bool

return true if file exists.

func Float32Round

func Float32Round(f float32, pOffset int64) float32

func GetTimeInSeconds

func GetTimeInSeconds(timeStr string) int64

GetTimeInSeconds return the seconds representation of the timeString

timeStr in format hhhmmmsss ,e.g. 23h10m34s ,otherwise return -1

func HashUUID

func HashUUID(bs []byte) string

generate hash uuid of the input data.

func ImagEmpty

func ImagEmpty(a []uint8) float32

func ImageColorId

func ImageColorId(im image.Image) uint64

func ImageHashContentRate

func ImageHashContentRate(a uint64) float32

func ImageHashDiff

func ImageHashDiff(a, b uint64) float32

func ImageHashId

func ImageHashId(im image.Image, bs []byte) (image.Image, image.Image, uint64, error)

func ImageHashNull

func ImageHashNull(a uint64) uint8

func ImageMaskAllow

func ImageMaskAllow(masks [][]float32, x, y int, w, h int) bool

func ImagePixGray

func ImagePixGray(im image.Image, x, y int) uint8

func ImageSimilarity

func ImageSimilarity(a, b []uint8) float32

func ImageTag

func ImageTag(m image.Image, tagSpace int) []uint8

func ImgBytesDecode

func ImgBytesDecode(bs []byte) (image.Image, error)

func ImgShmBytes

func ImgShmBytes(file string) ([]byte, error)

func IsValidUUID

func IsValidUUID(UUID string) bool

check if UUID is in valid format.

func RandUUID

func RandUUID() string

generate random hash uuid.

func SplitSeconds

func SplitSeconds(seconds int64) (int64, int64)

SplitSeconds return unix timestamp in seconds with two part:begin of a day and the offset

func TimeRingFromDaysAgo

func TimeRingFromDaysAgo(days int) *ring.Ring

TimeRingFromDaysAgo return time ring from days ago util next day.

func TransTimeFormat

func TransTimeFormat(timeString string) string

TransTimeFormat Trans time format from hh:mm:ss to hhhmmmsss.If timeString format invalid return itself

eg. 23:10:34 => 23h10m34s