libmount/dist/libmount.min.mjs

Standalone FAT12, FAT16, FAT32, VFAT implementation in JavaScript

/**
 * LibMount v0.3.0
 * (c) 2024-present vip.delete
 * @license MIT
 **/
const lm = {};
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class Ra{constructor(a,b){this.h=a;this.codepage=b;a.g=0;var c=m(a,3);var d=m(a,8);var e={A:p(a),L:n(a),W:p(a),S:n(a),T:p(a),fa:p(a),na:n(a),$:p(a),Ea:p(a),Ba:p(a),Aa:q(a),ga:q(a)};var f;0===e.T?f={la:q(a),wa:p(a),ma:p(a),V:q(a),ya:p(a),Y:p(a),Ca:m(a,12)}:f=null;c={Ga:c,ja:d,m:e,U:f,va:n(a),Da:n(a),ua:n(a),ha:q(a),X:m(a,11),za:m(a,8),ta:m(a,f?420:448),Fa:p(a)};d=c.m;l([512,1024,2048,4096].includes(d.A));l([1,2,4,8,16,32,64,128].includes(d.L));l(0<d.W);l(0<d.S);l(0===32*d.T%d.A);l([240,248,249,250,
251,252,253,254,255].includes(d.na));l(0===d.T||0<d.$);l(0<d.fa||65536<=d.ga);null!==c.U&&(d=c.U,l(0===d.ma),l(2<=d.V),l(0===d.Y||6===d.Y),l(2<=d.V));c=this.j=c;var g=c.m;c=c.U;var h=g.$,k=g.fa;d=g.A;e=g.L;var D=g.W;const X=g.S;f=Math.floor((32*g.T+(d-1))/d);const Y=null===c?h:c.la;g=0===k?g.ga:k;k=g-(D+X*Y+f);const ta=Math.floor(k/e);h=D+X*h;D=D+X*Y+f;this.i={Ma:f,xa:Y,Pa:g,Ia:k,J:d*e,R:ta,aa:ta+1,Ka:h,N:D,ea:d*(null===c?h:D+(c.V-2)*e)};4085>this.i.R?c=new ya(this.h,this.j.m,this.i):65525>this.i.R?
c=new za(this.h,this.j.m,this.i):(this.h.g=this.j.m.A,e=this.h,c=q(e),e.g+=480,d=q(e),q(e),q(e),e.g+=12,e=q(e),l(1096897106===c),l(1631679090===d),l(2857697280===e),c=new Aa(this.h,this.j.m,this.i));this.g=c;this.I=new Ga(a,this.g,b);this.volume=new Sa(this)}}function Ta(a){for(const b of G(a.g.I,C)){if(9===b.g)break;if(3===b.g)return b}return null}
function Ua(a,b,c){const d=new Uint8Array(Array(c).fill(32));null!==b&&(a=a.g.codepage.encode(b.substring(0,11).trimEnd()).subarray(0,c),d.set(a));return d}
function Z(a){a.g.h.g=0;var b=a.g.h;a=a.g.j;r(b,a.Ga);r(b,a.ja);var c=a.m;u(b,c.A);t(b,c.L);u(b,c.W);t(b,c.S);u(b,c.T);u(b,c.fa);t(b,c.na);u(b,c.$);u(b,c.Ea);u(b,c.Ba);v(b,c.Aa);v(b,c.ga);null!==a.U&&(c=a.U,v(b,c.la),u(b,c.wa),u(b,c.ma),v(b,c.V),u(b,c.ya),u(b,c.Y),r(b,c.Ca));t(b,a.va);t(b,a.Da);t(b,a.ua);v(b,a.ha);r(b,a.X);r(b,a.za);r(b,a.ta);u(b,a.Fa)}
class Sa{constructor(a){this.g=a}getLabel(){const a=Ta(this);return null===a?this.g.codepage.decode(this.g.j.X).trimEnd():a.u}setLabel(a){var b=Ta(this);if(null===a)null!==b&&K(this.g,b),this.g.j.X=Ja;else{a=Ua(this,a,11);if(null===b){b={s:a,Attr:8,O:0,D:0,C:0,B:0,F:0,o:0,H:0,G:0,l:0,v:0};var c=Na(this.g,C,1);null!==c&&(this.g.h.g=c,B(this.g.h,b))}else c=b.dir,c.s=a,this.g.h.g=b.h,B(this.g.h,c);this.g.j.X=a}Z(this)}getOEMName(){return this.g.codepage.decode(this.g.j.ja).trimEnd()}setOEMName(a){this.g.j.ja=
Ua(this,a,8);Z(this)}getId(){return this.g.j.ha}setId(a){this.g.j.ha=a>>>0;Z(this)}getSizeOfCluster(){return this.g.i.J}getCountOfClusters(){return this.g.i.R}getFreeClusters(){var a=this.g.g;let b=0;for(let c=2;c<=a.h.aa;c++)0===I(a,c)&&b++;return b}}
function Qa(a,b){const c=[];let d=0;for(;d<a.length;){const e=new Uint8Array(10),f=new Uint8Array(12),g=new Uint8Array(4);e.fill(255);f.fill(255);g.fill(255);e.set(a.subarray(d,d+10));f.set(a.subarray(d+10,d+22));g.set(a.subarray(d+22,d+26));const h=a.length-d;10>h?(e[h]=0,e[h+1]=0):22>h?(f[h-10]=0,f[h-10+1]=0):26>h&&(g[h-22]=0,g[h-22+1]=0);c.push({K:1+c.length,ba:e,Attr:15,ra:0,Z:b,ca:f,l:0,da:g});d+=26}c.at(-1).K|=64;return c}
function W(a){const b=new Date,c=b.getFullYear()-1980<<9|b.getMonth()+1<<5|b.getDate(),d=b.getHours()<<11|b.getMinutes()<<5|b.getSeconds()>>1;return{s:a,Attr:0,O:0,D:Math.floor((b.getSeconds()%2*1E3+Number(b.getMilliseconds()))/10),C:d,B:c,F:c,o:0,H:d,G:c,l:0,v:0}}function Pa(a,b){return{s:a,Attr:16,O:0,D:b.D,C:b.C,B:b.B,F:b.F,o:b.o,H:b.H,G:b.G,l:b.l,v:0}};function Va(a){if(512>a.g.length())return!1;a.g.g=510;return 43605===p(a.g)}class Wa{constructor(a,b){this.g=a;this.codepage=b}getFileSystem(){if(!Va(this))return null;try{return new na(new Ra(this.g,this.codepage))}catch{return null}}getPartitions(){if(!Va(this))return[];this.g.g=446;return ma(this.g).map(a=>({active:128===a.ka,type:a.pa,begin:512*a.oa,end:512*(a.oa+a.qa)}))}};lm.mount=function(a,b){const c=b?.partition??{active:!1,type:1,begin:0,end:a.length};return new Wa(new da(a.subarray(c.begin,c.end)),b?.codepage??ca)};})();
export const { mount } = lm;