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Tidied up Base85 ops

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n1474335 2018-08-23 22:05:31 +01:00
parent c818370123
commit 8e9fece77d
3 changed files with 15 additions and 14 deletions
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16
src/core/operations/ToBase85.mjs
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@ -6,6 +6,7 @@
import Operation from "../Operation";
import OperationError from "../errors/OperationError";
import Utils from "../Utils";
import {alphabetName, ALPHABET_OPTIONS} from "../lib/Base85";
/**
@ -21,7 +22,7 @@ class ToBase85 extends Operation {
this.name = "To Base85";
this.module = "Default";
this.description = "Base85 (similar to Base64) is a notation for encoding arbitrary byte data. It is usually more efficient that Base64.<br><br>This operation encodes data in an ASCII string (with an alphabet of your choosing, presets included).<br><br>e.g. <code>hello world</code> becomes <code>BOu!rD]j7BEbo7</code><br><br>Base85 is commonly used in Adobe's PostScript and PDF file formats.<br><br><strong>Options</strong><br><u>Alphabet</u><ul><li>Standard - The standard alphabet, referred to as Ascii85</li><li>Z85 (ZeroMQ) - A string-safe variant of Base85, which avoids quote marks and backslash characters</li><li>IPv6 - A variant of Base85 suitable for encoding IPv6 addresses (RFC 1924)</li></ul><u>Include delimiter</u><br>Adds a '<~' and '~>' delimiter to the start and end of the data. This is standard for Adobe's implementation of Base85.";
this.description = "Base85 (also called Ascii85) is a notation for encoding arbitrary byte data. It is usually more efficient that Base64.<br><br>This operation encodes data in an ASCII string (with an alphabet of your choosing, presets included).<br><br>e.g. <code>hello world</code> becomes <code>BOu!rD]j7BEbo7</code><br><br>Base85 is commonly used in Adobe's PostScript and PDF file formats.<br><br><strong>Options</strong><br><u>Alphabet</u><ul><li>Standard - The standard alphabet, referred to as Ascii85</li><li>Z85 (ZeroMQ) - A string-safe variant of Base85, which avoids quote marks and backslash characters</li><li>IPv6 - A variant of Base85 suitable for encoding IPv6 addresses (RFC 1924)</li></ul><u>Include delimiter</u><br>Adds a '<~' and '~>' delimiter to the start and end of the data. This is standard for Adobe's implementation of Base85.";
this.infoURL = "https://wikipedia.org/wiki/Ascii85";
this.inputType = "byteArray";
this.outputType = "string";
@ -32,7 +33,7 @@ class ToBase85 extends Operation {
value: ALPHABET_OPTIONS
},
{
name: "Include Delimeter",
name: "Include delimeter",
type: "boolean",
value: false
}
@ -45,13 +46,14 @@ class ToBase85 extends Operation {
* @returns {string}
*/
run(input, args) {
const alphabet = args[0] || ALPHABET_OPTIONS[0].value,
encoding = alphabetName(alphabet);
const alphabet = Utils.expandAlphRange(args[0]).join(""),
encoding = alphabetName(alphabet),
includeDelim = args[1];
let result = "";
if (alphabet.length !== 85 ||
[].unique.call(alphabet).length !== 85) {
throw new OperationError("Error: alphabet must be of length 85");
throw new OperationError("Error: Alphabet must be of length 85");
}
if (input.length === 0) return "";
@ -84,9 +86,7 @@ class ToBase85 extends Operation {
}
}
if (args[1] === true) result = "<~" + result + "~>";
return result;
return includeDelim ? `<~${result}~>` : result;
}
}