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@alttiri/base85

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@alttiri/base85 - npm Package Compare versions

Comparing version 1.5.0 to 1.5.1

0

base85.d.ts

@@ -0,0 +0,0 @@ /** 85 unique characters string */

33

base85.js
const ascii85 = charsetToMap(`!"#$%&'()*+,-./0123456789:;<=>?@ABCDEFGHIJKLMNOPQRSTUVWXYZ[\\]^_\`abcdefghijklmnopqrstu`);
const z85 = charsetToMap(`0123456789abcdefghijklmnopqrstuvwxyzABCDEFGHIJKLMNOPQRSTUVWXYZ.-:+=^!/*?&<>()[]{}@%$#`);
const pow2 = 85 * 85;
const pow3 = 85 * 85 * 85;
const pow4 = 85 * 85 * 85 * 85;
const pow2 = 85 ** 2;
const pow3 = 85 ** 3;
const pow4 = 85 ** 4;

@@ -11,3 +11,5 @@ /** @param {"ascii85" | "z85" | string} [charset="z85"]

function getMap(charset = "z85") {
if (charset === "ascii85") {return ascii85;}
if (charset === "ascii85") {
return ascii85;
}
if (charset?.length === 85) {

@@ -27,2 +29,3 @@ return charsetToMap(charset);

}
/** @param {Uint8Array} mapOrig

@@ -48,3 +51,3 @@ * @return {Uint8Array} */

const last5Length = remain ? remain + 1 : 0;
const length = Math.ceil(ui8a.length * 5/4);
const length = Math.ceil(ui8a.length * 5 / 4);
const target = new Uint8Array(length);

@@ -57,3 +60,3 @@

for (let k = 4; k >= 0; k--) {
target[k + i*5] = charMap[num % 85];
target[k + i * 5] = charMap[num % 85];
num = Math.trunc(num / 85);

@@ -90,3 +93,3 @@ }

const map = getMap(charset);
const revMap = getReverseMap(map);
const revMap = getReverseMap(map);

@@ -100,8 +103,8 @@ const base85ab = new TextEncoder().encode(base85);

for (; i < base85ab.length / 5 - 1; i++) {
const c1 = revMap[base85ab[i*5 + 4]];
const c2 = revMap[base85ab[i*5 + 3]] * 85;
const c3 = revMap[base85ab[i*5 + 2]] * pow2;
const c4 = revMap[base85ab[i*5 + 1]] * pow3;
const c5 = revMap[base85ab[i*5 ]] * pow4;
dw.setUint32(i * 4, c1+c2+c3+c4+c5);
const c1 = revMap[base85ab[i * 5 + 4]];
const c2 = revMap[base85ab[i * 5 + 3]] * 85;
const c3 = revMap[base85ab[i * 5 + 2]] * pow2;
const c4 = revMap[base85ab[i * 5 + 1]] * pow3;
const c5 = revMap[base85ab[i * 5 ]] * pow4;
dw.setUint32(i * 4, c1 + c2 + c3 + c4 + c5);
}

@@ -117,5 +120,5 @@

const c5 = revMap[lastPart[0]] * pow4;
dw.setUint32(0, c1+c2+c3+c4+c5);
dw.setUint32(0, c1 + c2 + c3 + c4 + c5);
for (let j = 0; j < 4 - pad; j++) {
ints[i*4 + j] = lastPart[j];
ints[i * 4 + j] = lastPart[j];
}

@@ -122,0 +125,0 @@

2

package.json
{
"name": "@alttiri/base85",
"version": "1.5.0",
"version": "1.5.1",
"description": "Pretty fast base85 JavaScript library",

@@ -5,0 +5,0 @@ "author": "alttiri",

17

README.md
# base85
[Pretty fast](https://github.com/AlttiRi/base85/blob/7a6edf4b9c0b16e0d63e35c0c102c1875f78ddb0/tests/test-2-speed.js#L23-L52) base85 JavaScript library (with TS support).
It is designed to encode binary data (`Uint8Array`) into a "base85" text string.
It is designed to encode binary data (`Uint8Array`) into a "base85" text string and vice versa.
```bash
npm install @alttiri/base85
```
## API
#### `function encode(ui8a: Uint8Array, charset?: "ascii85" | "z85" | string) : string`
#### `function encode(ui8a: Uint8Array, charset?: "ascii85" | "z85" | string): string`
[`encode`](https://github.com/AlttiRi/base85/blob/42343e624f27ec68aa936a274c297ccd6c15c8cb/index.js#L42) encodes the input `Uint8Array` into base85 `String`.
[`encode`](https://github.com/AlttiRi/base85/blob/42343e624f27ec68aa936a274c297ccd6c15c8cb/index.js#L42) encodes the input `Uint8Array` into base85 `string`.
#### `function decode(base85: string, charset?: "ascii85" | "z85" | string) : Uint8Array`
#### `function decode(base85: string, charset?: "ascii85" | "z85" | string): Uint8Array`
[`decode`](https://github.com/AlttiRi/base85/blob/42343e624f27ec68aa936a274c297ccd6c15c8cb/index.js#L84) decodes the input base85 `String` into `Uint8Array`.
[`decode`](https://github.com/AlttiRi/base85/blob/42343e624f27ec68aa936a274c297ccd6c15c8cb/index.js#L84) decodes the input base85 `string` into `Uint8Array`.

@@ -91,7 +94,7 @@ `charset` is "z85" by default.

```bash
npm install git+https://github.com/alttiri/base85.git#semver:1.4.0
npm install git+https://github.com/alttiri/base85.git#semver:1.5.1
```
Or add
```
"@alttiri/base85": "github:alttiri/base85#semver:1.4.0"
"@alttiri/base85": "github:alttiri/base85#semver:1.5.1"
```

@@ -98,0 +101,0 @@ as `dependencies` in `package.json` file.

61

tests/test-2-speed.js
import {decode, encode} from "../base85.js";
const input = "QWERTY1234".repeat(100_000*5);
const input = "QWERTY1234".repeat(100_000 * 5);
console.log(`Input: ${input.length} chars string`);
// -----------------------------------

@@ -11,4 +13,4 @@ console.log("\n--- AlttiRi/base85 ---");

console.time("encode");
const encodedAb = new TextEncoder().encode(input);
const encoded1 = encode(encodedAb);
const inputAb = new TextEncoder().encode(input);
const encoded1 = encode(inputAb);
console.timeEnd("encode");

@@ -24,2 +26,3 @@

/*

@@ -54,16 +57,15 @@ Input: 5000000 chars string

output1 === output4: true
*/
*/
// Uncomment and install "base85"
// -----------------------------------
// Uncomment and "npm install base85" (4.68 MB of node_modules)
// https://github.com/noseglid/base85
// -----------------------------------
/*
// -----------------------------------
console.log("\n--- noseglid/base85 ---");
// https://github.com/noseglid/base85
import base85 from "base85";
console.time("total");
console.time("encode");
const encoded2 = base85.encode(input).toString();
const encoded2 = base85.encode(input);
console.timeEnd("encode");

@@ -76,14 +78,13 @@

console.log("input === output2:", input === output2);
console.log("output1 === output2:", output1 === output2);
console.log("input === output2: ", input === output2);
console.log("encoded1 === encoded2:", encoded1 === encoded2);
console.log("output1 === output2: ", output1 === output2);
*/
// -----------------------------------
// Uncomment and copy-paste the code from GitHub
// https://github.com/Sheep-y/Base85/blob/master/javascript/base85.js
// -----------------------------------
/*
// -----------------------------------
console.log("\n--- Sheep-y/Base85 ---");
// put code here from
// https://github.com/Sheep-y/Base85/blob/master/javascript/base85.js
(function() {})(

@@ -93,3 +94,2 @@ ...

console.time("total");

@@ -105,13 +105,13 @@ console.time("encode");

console.log("input === output3:", input === output3);
console.log("output1 === output3:", output1 === output3);
console.log("input === output3: ", input === output3);
console.log("encoded1 === encoded3:", encoded1 === encoded3);
console.log("output1 === output3: ", output1 === output3);
*/
// -----------------------------------
// Uncomment and install "npm install ascii85"
// https://github.com/huandu/node-ascii85
// -----------------------------------
/*
// Uncomment and install "ascii85"
// -----------------------------------
console.log("\n--- huandu/node-ascii85 ---");
// https://github.com/huandu/node-ascii85
import ascii85 from "ascii85";

@@ -123,12 +123,13 @@

console.time("encode");
const encoded3 = ZeroMQ.encode(input).toString();
const encoded4 = ZeroMQ.encode(input).toString();
console.timeEnd("encode");
console.time("decode");
const output4 = ZeroMQ.decode(encoded3).toString();
const output4 = ZeroMQ.decode(encoded4).toString();
console.timeEnd("decode");
console.timeEnd("total");
console.log("input === output4:", input === output4);
console.log("output1 === output4:", output1 === output4);
*/
console.log("input === output4: ", input === output4);
console.log("encoded1 === encoded4:", encoded1 === encoded4);
console.log("output1 === output4: ", output1 === output4);
*/
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