crockford

This library implements Crockford's base 32 encoding as defined at https://www.crockford.com/base32.html.

Installation

1. Add the dependency to your shard.yml:

   dependencies:
     crockford:
       github: davidkellis/crockford

2. Run shards install

Usage

There are three methods that make up the API:

• Crockford.encode(number : Int, encoding : Encoding = Crockford::DEFAULT) : String

  Takes a non-negative integer and encodes it with Crockford's base-32 encoding. Returns a String representing the encoded value.

• Crockford.decode(str : String, encoding : Encoding = Crockford::DEFAULT) : UInt64

  Decodes the given Crockford base-32 encoded string. Raises ArgumentError if the encoded string value does not represent a valid encoded value. Returns a UInt64 representation of the encoded value.

• Crockford.decode?(str : String, encoding : Encoding = Crockford::DEFAULT) : UInt64?

  Decodes the given Crockford base-32 encoded string. Returns a UInt64 representation of the encoded value if the encoded string represents a valid encoded value; otherwise, returns nil.

require "crockford"

encoded_value = Crockford.encode(123)               # encoded_value = "3V"
decoded_value = Crockford.decode(encoded_value)     # decoded_value = 123

Crockford.encode(-5)                                # raises ArgumentError, "Unable to encode negative values."

Crockford.decode("invalid_value")                   # raises ArgumentError, "Unable to decode ordinal 95."

optional_val = Crockford.decode?("invalid_value")   # optional_val = nil

Contributors

• David Ellis - creator and maintainer