ULEB128_33
Encoding and decoding large numbers (uleb128 and uleb128_33)
Installation
npm install uleb128_33Documentation
readUleb128: Gets the Uint8Array parameter, returns the object
const readUleb128: (buffer: Uint8Array) => {
value: string;
length: number;
};
readUleb128_33: Gets the Uint8Array parameter, returns the object
const readUleb128_33: (buffer: Uint8Array) => {
value: string;
length: number;
isMark: number;
};
writeUleb128: Gets an integer parameter, can be a string or a number. Returns array of bytes
const writeUleb128: (integer: number | string) => number[];
writeUleb128_33: Gets an integer parameter, can be a string or a number, and an optional isMark, boolean (see below). If not specified, it is determined automatically. Returns an array of bytes
const writeUleb128_33: (integer: number | string, isMark?: boolean) => number[];
getUleb128Length: Gets an integer parameter, can be a string or a number. Returns number length
const getUleb128Length: (integer: number | string) => number;
getUleb128_33Length: Gets an integer parameter, can be a string or a number. Returns number length
const getUleb128_33Length: (integer: number | string) => number;isMark
If the "isMark" is 0, then the value read is a number (32-bit number) Otherwise, the value is a 64-bit number, and you need to read another ULEB128
Usage
ESNext
import {
getUleb128Length,
getUleb128_33Length,
readUleb128,
readUleb128_33,
writeUleb128,
writeUleb128_33,
} from "uleb128_33";CommonJS
const {
getUleb128Length,
getUleb128_33Length,
readUleb128,
readUleb128_33,
writeUleb128,
writeUleb128_33,
} = require("uleb128_33");readUleb128
const uintArray = new Uint8Array([
133, 133, 133, 5, 255, 243, 151, 229, 228, 131, 24, 11, 35, 11, 111, 66,
]);
const dataOne = readUleb128(uintArray);
const dataTwo = readUleb128(uintArray.subarray(dataOne.length));
console.log(dataOne); // { length: 4, value: "10568325" }
console.log(dataTwo); // { length: 7, value: "105683251231231" }readUleb128_33
const uintArray = new Uint8Array([
138, 152, 184, 128, 1, 193, 253, 243, 174, 137, 188, 188, 222, 3,
]);
const dataOne = readUleb128_33(uintArray);
const dataTwo = readUleb128_33(uintArray.subarray(dataOne.length));
console.log(dataOne); // { isMark: 0, value: "134678021", length: 5 }
console.log(dataTwo); // { isMark: 1, value: "134678012312321888", length: 9 }writeUleb128_33
const dataOne = writeUleb128_33(134678021);
const dataTwo = writeUleb128_33("134678012312321888");
console.log(dataOne); // [138, 152, 184, 128, 1]
console.log(dataTwo); // [193, 253, 243, 174, 137, 188, 188, 222, 3]Test
You can run the tests through npm run test.
You will need to install rimraf, typescript, and jest in the global area
LICENSE
The MIT License (MIT)