byteutil

Documentation

Overview

Package byteutil provides various operations on bytes and byte strings.

Index

• func ByteToLower(b byte) byte
• func ByteToUpper(b byte) byte
• func IndexAny(s, chars string) int
• func IndexAnyTable(s string, t *[256]bool) int
• func IsAlphaNum(b byte) bool
• func IsDigit(b byte) bool
• func IsHexDigit(b byte) bool
• func IsLetter(b byte) bool
• func IsLowercaseLetter(b byte) bool
• func IsUppercaseLetter(b byte) bool
• func ToLower(s string) string
• func ToUpper(s string) string
• func Unhex(d byte) byte

Examples

• ByteToLower
• ByteToUpper
• IndexAny
• IndexAnyTable
• IsAlphaNum
• IsDigit
• IsHexDigit
• IsLetter
• IsLowercaseLetter
• IsUppercaseLetter
• ToLower
• ToUpper
• Unhex

Functions

func ByteToLower

func ByteToLower(b byte) byte

Example

fmt.Printf("%c\n", ByteToLower('a'))
fmt.Printf("%c\n", ByteToLower('A'))
fmt.Printf("%c\n", ByteToLower('0'))
fmt.Printf("%c\n", ByteToLower('.'))

Output:

a
a
0
.

func ByteToUpper

func ByteToUpper(b byte) byte

Example

fmt.Printf("%c\n", ByteToUpper('a'))
fmt.Printf("%c\n", ByteToUpper('A'))
fmt.Printf("%c\n", ByteToUpper('0'))
fmt.Printf("%c\n", ByteToUpper('.'))

Output:

A
A
0
.

func IndexAny

func IndexAny(s, chars string) int

Example

fmt.Println(IndexAny("abcdefghijklmnopqrstuvwxyz", "zyx"))

Output:

23

func IndexAnyTable

func IndexAnyTable(s string, t *[256]bool) int

Example

var t [256]bool
t['z'], t['y'], t['x'] = true, true, true
fmt.Println(IndexAnyTable("abcdefghijklmnopqrstuvwxyz", &t))

Output:

23

func IsAlphaNum

func IsAlphaNum(b byte) bool

Example

fmt.Println(IsAlphaNum('0'))
fmt.Println(IsAlphaNum('9'))
fmt.Println(IsAlphaNum('a'))
fmt.Println(IsAlphaNum('Z'))
fmt.Println(IsAlphaNum('.'))

Output:

true
true
true
true
false

func IsDigit

func IsDigit(b byte) bool

Example

fmt.Println(IsDigit('0'))
fmt.Println(IsDigit('9'))
fmt.Println(IsDigit('a'))

Output:

true
true
false

func IsHexDigit

func IsHexDigit(b byte) bool

Example

fmt.Println(IsHexDigit('0'))
fmt.Println(IsHexDigit('9'))
fmt.Println(IsHexDigit('a'))
fmt.Println(IsHexDigit('F'))
fmt.Println(IsHexDigit('G'))

Output:

true
true
true
true
false

func IsLetter

func IsLetter(b byte) bool

Example

fmt.Println(IsLetter('a'))
fmt.Println(IsLetter('Z'))
fmt.Println(IsLetter('0'))

Output:

true
true
false

func IsLowercaseLetter

func IsLowercaseLetter(b byte) bool

Example

fmt.Println(IsLowercaseLetter('a'))
fmt.Println(IsLowercaseLetter('z'))
fmt.Println(IsLowercaseLetter('A'))

Output:

true
true
false

func IsUppercaseLetter

func IsUppercaseLetter(b byte) bool

Example

fmt.Println(IsUppercaseLetter('A'))
fmt.Println(IsUppercaseLetter('Z'))
fmt.Println(IsUppercaseLetter('a'))

Output:

true
true
false

func ToLower

func ToLower(s string) string

Example

fmt.Println(ToLower(".012345abcdefABCDEFабвгд"))

Output:

.012345abcdefabcdefабвгд

func ToUpper

func ToUpper(s string) string

Example

fmt.Println(ToUpper(".012345abcdefABCDEFабвгд"))

Output:

.012345ABCDEFABCDEFабвгд

func Unhex

func Unhex(d byte) byte

Example

fmt.Println(Unhex('0'))
fmt.Println(Unhex('9'))
fmt.Println(Unhex('a'))
fmt.Println(Unhex('A'))
fmt.Println(Unhex('f'))
fmt.Println(Unhex('F'))

Output:

0
9
10
10
15
15