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Tidied up Base85 ops

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This commit is contained in:
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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7
src/core/operations/FromBase85.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 FromBase85 extends Operation {
this.name = "From 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 decodes data from an ASCII string (with an alphabet of your choosing, presets included).<br><br>e.g. <code>BOu!rD]j7BEbo7</code> becomes <code>hello world</code><br><br>Base85 is commonly used in Adobe's PostScript and PDF file formats.";
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 decodes data from an ASCII string (with an alphabet of your choosing, presets included).<br><br>e.g. <code>BOu!rD]j7BEbo7</code> becomes <code>hello world</code><br><br>Base85 is commonly used in Adobe's PostScript and PDF file formats.";
this.infoURL = "https://wikipedia.org/wiki/Ascii85";
this.inputType = "string";
this.outputType = "byteArray";
@ -40,7 +41,7 @@ class FromBase85 extends Operation {
* @returns {byteArray}
*/
run(input, args) {
const alphabet = args[0] || ALPHABET_OPTIONS[0].value,
const alphabet = Utils.expandAlphRange(args[0]).join(""),
encoding = alphabetName(alphabet),
result = [];
@ -68,7 +69,7 @@ class FromBase85 extends Operation {
.map((chr, idx) => {
const digit = alphabet.indexOf(chr);
if (digit < 0 || digit > 84) {
throw "Invalid character '" + chr + "' at index " + idx;
throw `Invalid character '${chr}' at index ${idx}`;
}
return digit;
});