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import {u8Encode, u8Decode} from "./text.ts";
const MINIPACK_NAME = 1;const MINIPACK_BODY = 4;
/*** Simple name and data pair.*/export interface DataMap{    name: string;    body: Uint8Array;}
/*** Concatenate files with "minipack" format.* @see https://deno.land/x/simple_utility#minipack* @example* ```ts* const files = [{*     name: "foo.txt",*     body: await Deno.readFile("./foo.txt")* }];* const encode = minipackEncode(files);* const decode = minipackDecode(encode);* ```*/export function minipackEncode(files:DataMap[]):Uint8Array{    const archive = new Uint8Array(files.reduce((size, {name, body}) => size + MINIPACK_NAME + MINIPACK_BODY + u8Encode(name).byteLength + body.byteLength, 0));
    let i = 0;    for(const {name, body} of files){        const u8name = u8Encode(name);
        new DataView(archive.buffer, i).setUint8(0, u8name.byteLength);        i += MINIPACK_NAME;
        new DataView(archive.buffer, i).setUint32(0, body.byteLength);        i += MINIPACK_BODY;
        archive.set(u8name, i);        i += u8name.byteLength;
        archive.set(body, i);        i += body.byteLength;    }
    return archive;}
/*** Decode binary of "minipack" format.* @see https://deno.land/x/simple_utility#minipack* @example* ```ts* const files = [{*     name: "foo.txt",*     body: await Deno.readFile("./foo.txt")* }];* const encode = minipackEncode(files);* const decode = minipackDecode(encode);* ```*/export function minipackDecode(archive:Uint8Array):DataMap[]{    const files:DataMap[] = [];
    for(let i = 0; i < archive.byteLength;){        const ns = new DataView(archive.buffer, i).getUint8(0);        i += MINIPACK_NAME;
        const bs = new DataView(archive.buffer, i).getUint32(0);        i += MINIPACK_BODY;
        files.push({            name: u8Decode(archive.subarray(i, i += ns)),            body: archive.slice(i, i += bs)        });    }
    return files;}