isbn

README

isbn

Package isbn provides functions to validate ISBN strings, calculate ISBN check digits and convert ISBN-10 to ISBN-13.

License

BSD licensed. See the LICENSE file for details.

Documentation

Overview

Package isbn provides functions to validate ISBN strings, calculate ISBN check digits and convert ISBN-10 to ISBN-13.

Index

• func CheckDigit10(isbn10 string) (string, error)
• func CheckDigit13(isbn13 string) (string, error)
• func To13(isbn10 string) (string, error)
• func Validate(isbn string) bool
• func Validate10(isbn10 string) bool
• func Validate13(isbn13 string) bool

Functions

func CheckDigit10

func CheckDigit10(isbn10 string) (string, error)

CheckDigit10 returns the check digit for an ISBN-10.

The provided string must have a length of 9 or 10 and no formatting characters (spaces or hyphens). For a 10-length string, the last character (the digit) is ignored since that is what is being (re)calculated.

func CheckDigit13

func CheckDigit13(isbn13 string) (string, error)

CheckDigit13 returns the check digit for an ISBN-13.

The provided string must have a length of 12 or 13 and no formatting characters (spaces or hyphens). For a 13-length string, the last character (the digit) is ignored since that is what is being (re)calculated.

func To13

func To13(isbn10 string) (string, error)

To13 converts an ISBN-10 to an ISBN-13.

The provided string must have a length of 9 or 10 and no formatting characters (spaces or hyphens).

func Validate

func Validate(isbn string) bool

Validate returns true if the provided string is a valid ISBN-10 or ISBN-13.

The provided string must have a length of 10 or 13 and no formatting characters (spaces or hyphens).

func Validate10

func Validate10(isbn10 string) bool

Validate10 returns true if the provided string is a valid ISBN-10.

The provided string must have a length of 10 and no formatting characters (spaces or hyphens).

func Validate13

func Validate13(isbn13 string) bool

Validate13 returns true if the provided string is a valid ISBN-13.

The provided string must have a length of 13 and no formatting characters (spaces or hyphens).