3 lines
10 KiB
JavaScript
3 lines
10 KiB
JavaScript
/* cfb.js (C) 2013-2014 SheetJS -- http://sheetjs.com */
|
|
var Base64=function(){var map="ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/=";return{decode:function(input){var o="";var c1,c2,c3;var e1,e2,e3,e4;input=input.replace(/[^\w\+\/\=]/g,"");for(var i=0;i<input.length;){e1=map.indexOf(input.charAt(i++));e2=map.indexOf(input.charAt(i++));c1=e1<<2|e2>>4;o+=String.fromCharCode(c1);e3=map.indexOf(input.charAt(i++));c2=(e2&15)<<4|e3>>2;if(e3!==64){o+=String.fromCharCode(c2)}e4=map.indexOf(input.charAt(i++));c3=(e3&3)<<6|e4;if(e4!==64){o+=String.fromCharCode(c3)}}return o}}}();var chr0=/\u0000/g,chr1=/[\u0001-\u0006]/;var s2a,_s2a;s2a=_s2a=function _s2a(s){return s.split("").map(function(x){return x.charCodeAt(0)&255})};var __toBuffer,___toBuffer;__toBuffer=___toBuffer=function(bufs){var x=[];for(var i=0;i<bufs[0].length;++i){x.push.apply(x,bufs[0][i])}return x};var __utf16le,___utf16le;__utf16le=___utf16le=function(b,s,e){var ss=[];for(var i=s;i<e;i+=2)ss.push(String.fromCharCode(__readUInt16LE(b,i)));return ss.join("").replace(chr0,"").replace(chr1,"!")};var __hexlify,___hexlify;__hexlify=___hexlify=function(b,s,l){return b.slice(s,s+l).map(function(x){return(x<16?"0":"")+x.toString(16)}).join("")};var bconcat=function(bufs){return[].concat.apply([],bufs)};if(typeof Buffer!=="undefined"){__utf16le=function(b,s,e){if(!Buffer.isBuffer(b))return ___utf16le(b,s,e);return b.toString("utf16le",s,e).replace(chr0,"").replace(chr1,"!")};__hexlify=function(b,s,l){return Buffer.isBuffer(b)?b.toString("hex",s,s+l):___hexlify(b,s,l)};__toBuffer=function(bufs){return bufs[0].length>0&&Buffer.isBuffer(bufs[0][0])?Buffer.concat(bufs[0]):___toBuffer(bufs)};s2a=function(s){return Buffer(s,"binary")};bconcat=function(bufs){return Buffer.isBuffer(bufs[0])?Buffer.concat(bufs):[].concat.apply([],bufs)}}var __readUInt8=function(b,idx){return b[idx]};var __readUInt16LE=function(b,idx){return b[idx+1]*(1<<8)+b[idx]};var __readInt16LE=function(b,idx){var u=b[idx+1]*(1<<8)+b[idx];return u<32768?u:(65535-u+1)*-1};var __readUInt32LE=function(b,idx){return b[idx+3]*(1<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx]};var __readInt32LE=function(b,idx){return(b[idx+3]<<24)+(b[idx+2]<<16)+(b[idx+1]<<8)+b[idx]};function ReadShift(size,t){var oI,oS,type=0;switch(size){case 1:oI=__readUInt8(this,this.l);break;case 2:oI=(t!=="i"?__readUInt16LE:__readInt16LE)(this,this.l);break;case 4:oI=__readInt32LE(this,this.l);break;case 16:type=2;oS=__hexlify(this,this.l,size)}this.l+=size;if(type===0)return oI;return oS}function CheckField(hexstr,fld){var m=__hexlify(this,this.l,hexstr.length>>1);if(m!==hexstr)throw fld+"Expected "+hexstr+" saw "+m;this.l+=hexstr.length>>1}function prep_blob(blob,pos){blob.l=pos;blob.read_shift=ReadShift;blob.chk=CheckField}var CFB=function _CFB(){var exports={};exports.version="0.10.2";function parse(file){var mver=3;var ssz=512;var nmfs=0;var ndfs=0;var dir_start=0;var minifat_start=0;var difat_start=0;var fat_addrs=[];var blob=file.slice(0,512);prep_blob(blob,0);var mv=check_get_mver(blob);mver=mv[0];switch(mver){case 3:ssz=512;break;case 4:ssz=4096;break;default:throw"Major Version: Expected 3 or 4 saw "+mver}if(ssz!==512){blob=file.slice(0,ssz);prep_blob(blob,28)}var header=file.slice(0,ssz);check_shifts(blob,mver);var nds=blob.read_shift(4,"i");if(mver===3&&nds!==0)throw"# Directory Sectors: Expected 0 saw "+nds;blob.l+=4;dir_start=blob.read_shift(4,"i");blob.l+=4;blob.chk("00100000","Mini Stream Cutoff Size: ");minifat_start=blob.read_shift(4,"i");nmfs=blob.read_shift(4,"i");difat_start=blob.read_shift(4,"i");ndfs=blob.read_shift(4,"i");for(var q,j=0;j<109;++j){q=blob.read_shift(4,"i");if(q<0)break;fat_addrs[j]=q}var sectors=sectorify(file,ssz);sleuth_fat(difat_start,ndfs,sectors,ssz,fat_addrs);var sector_list=make_sector_list(sectors,dir_start,fat_addrs,ssz);sector_list[dir_start].name="!Directory";if(nmfs>0&&minifat_start!==ENDOFCHAIN)sector_list[minifat_start].name="!MiniFAT";sector_list[fat_addrs[0]].name="!FAT";sector_list.fat_addrs=fat_addrs;sector_list.ssz=ssz;var files={},Paths=[],FileIndex=[],FullPaths=[],FullPathDir={};read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex);build_full_paths(FileIndex,FullPathDir,FullPaths,Paths);var root_name=Paths.shift();Paths.root=root_name;var find_path=make_find_path(FullPaths,Paths,FileIndex,files,root_name);return{raw:{header:header,sectors:sectors},FileIndex:FileIndex,FullPaths:FullPaths,FullPathDir:FullPathDir,find:find_path}}function check_get_mver(blob){blob.chk(HEADER_SIGNATURE,"Header Signature: ");blob.chk(HEADER_CLSID,"CLSID: ");var mver=blob.read_shift(2,"u");return[blob.read_shift(2,"u"),mver]}function check_shifts(blob,mver){var shift=9;blob.chk("feff","Byte Order: ");switch(shift=blob.read_shift(2)){case 9:if(mver!==3)throw"MajorVersion/SectorShift Mismatch";break;case 12:if(mver!==4)throw"MajorVersion/SectorShift Mismatch";break;default:throw"Sector Shift: Expected 9 or 12 saw "+shift}blob.chk("0600","Mini Sector Shift: ");blob.chk("000000000000","Reserved: ")}function sectorify(file,ssz){var nsectors=Math.ceil(file.length/ssz)-1;var sectors=new Array(nsectors);for(var i=1;i<nsectors;++i)sectors[i-1]=file.slice(i*ssz,(i+1)*ssz);sectors[nsectors-1]=file.slice(nsectors*ssz);return sectors}function build_full_paths(FI,FPD,FP,Paths){var i=0,L=0,R=0,C=0,j=0,pl=Paths.length;var dad=new Array(pl),q=new Array(pl);for(;i<pl;++i){dad[i]=q[i]=i;FP[i]=Paths[i]}for(;j<q.length;++j){i=q[j];L=FI[i].L;R=FI[i].R;C=FI[i].C;if(dad[i]===i){if(L!==-1&&dad[L]!==L)dad[i]=dad[L];if(R!==-1&&dad[R]!==R)dad[i]=dad[R]}if(C!==-1)dad[C]=i;if(L!==-1){dad[L]=dad[i];q.push(L)}if(R!==-1){dad[R]=dad[i];q.push(R)}}for(i=1;i!==pl;++i)if(dad[i]===i){if(R!==-1&&dad[R]!==R)dad[i]=dad[R];else if(L!==-1&&dad[L]!==L)dad[i]=dad[L]}for(i=1;i<pl;++i){if(FI[i].type===0)continue;j=dad[i];if(j===0)FP[i]=FP[0]+"/"+FP[i];else while(j!==0){FP[i]=FP[j]+"/"+FP[i];j=dad[j]}dad[i]=0}FP[0]+="/";for(i=1;i<pl;++i){if(FI[i].type!==2)FP[i]+="/";FPD[FP[i]]=FI[i]}}function make_find_path(FullPaths,Paths,FileIndex,files,root_name){var UCFullPaths=new Array(FullPaths.length);var UCPaths=new Array(Paths.length),i;for(i=0;i<FullPaths.length;++i)UCFullPaths[i]=FullPaths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");for(i=0;i<Paths.length;++i)UCPaths[i]=Paths[i].toUpperCase().replace(chr0,"").replace(chr1,"!");return function find_path(path){var k;if(path.charCodeAt(0)===47){k=true;path=root_name+path}else k=path.indexOf("/")!==-1;var UCPath=path.toUpperCase().replace(chr0,"").replace(chr1,"!");var w=k===true?UCFullPaths.indexOf(UCPath):UCPaths.indexOf(UCPath);if(w===-1)return null;return k===true?FileIndex[w]:files[Paths[w]]}}function sleuth_fat(idx,cnt,sectors,ssz,fat_addrs){var q;if(idx===ENDOFCHAIN){if(cnt!==0)throw"DIFAT chain shorter than expected"}else if(idx!==-1){var sector=sectors[idx],m=(ssz>>>2)-1;for(var i=0;i<m;++i){if((q=__readInt32LE(sector,i*4))===ENDOFCHAIN)break;fat_addrs.push(q)}sleuth_fat(__readInt32LE(sector,ssz-4),cnt-1,sectors,ssz,fat_addrs)}}function get_sector_list(sectors,start,fat_addrs,ssz,chkd){var sl=sectors.length;var buf,buf_chain;if(!chkd)chkd=new Array(sl);var modulus=ssz-1,j,jj;buf=[];buf_chain=[];for(j=start;j>=0;){chkd[j]=true;buf[buf.length]=j;buf_chain.push(sectors[j]);var addr=fat_addrs[Math.floor(j*4/ssz)];jj=j*4&modulus;if(ssz<4+jj)throw"FAT boundary crossed: "+j+" 4 "+ssz;j=__readInt32LE(sectors[addr],jj)}return{nodes:buf,data:__toBuffer([buf_chain])}}function make_sector_list(sectors,dir_start,fat_addrs,ssz){var sl=sectors.length,sector_list=new Array(sl);var chkd=new Array(sl),buf,buf_chain;var modulus=ssz-1,i,j,k,jj;for(i=0;i<sl;++i){buf=[];k=i+dir_start;if(k>=sl)k-=sl;if(chkd[k]===true)continue;buf_chain=[];for(j=k;j>=0;){chkd[j]=true;buf[buf.length]=j;buf_chain.push(sectors[j]);var addr=fat_addrs[Math.floor(j*4/ssz)];jj=j*4&modulus;if(ssz<4+jj)throw"FAT boundary crossed: "+j+" 4 "+ssz;j=__readInt32LE(sectors[addr],jj)}sector_list[k]={nodes:buf,data:__toBuffer([buf_chain])}}return sector_list}function read_directory(dir_start,sector_list,sectors,Paths,nmfs,files,FileIndex){var blob;var minifat_store=0,pl=Paths.length?2:0;var sector=sector_list[dir_start].data;var i=0,namelen=0,name,o,ctime,mtime;for(;i<sector.length;i+=128){blob=sector.slice(i,i+128);prep_blob(blob,64);namelen=blob.read_shift(2);if(namelen===0)continue;name=__utf16le(blob,0,namelen-pl);Paths.push(name);o={name:name,type:blob.read_shift(1),color:blob.read_shift(1),L:blob.read_shift(4,"i"),R:blob.read_shift(4,"i"),C:blob.read_shift(4,"i"),clsid:blob.read_shift(16),state:blob.read_shift(4,"i")};ctime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(ctime!==0){o.ctime=ctime;o.ct=read_date(blob,blob.l-8)}mtime=blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2)+blob.read_shift(2);if(mtime!==0){o.mtime=mtime;o.mt=read_date(blob,blob.l-8)}o.start=blob.read_shift(4,"i");o.size=blob.read_shift(4,"i");if(o.type===5){minifat_store=o.start;if(nmfs>0&&minifat_store!==ENDOFCHAIN)sector_list[minifat_store].name="!StreamData"}else if(o.size>=4096){o.storage="fat";if(sector_list[o.start]===undefined)sector_list[o.start]=get_sector_list(sectors,o.start,sector_list.fat_addrs,sector_list.ssz);sector_list[o.start].name=o.name;o.content=sector_list[o.start].data.slice(0,o.size);prep_blob(o.content,0)}else{o.storage="minifat";if(minifat_store!==ENDOFCHAIN&&o.start!==ENDOFCHAIN){o.content=sector_list[minifat_store].data.slice(o.start*MSSZ,o.start*MSSZ+o.size);prep_blob(o.content,0)}}files[name]=o;FileIndex.push(o)}}function read_date(blob,offset){return new Date((__readUInt32LE(blob,offset+4)/1e7*Math.pow(2,32)+__readUInt32LE(blob,offset)/1e7-11644473600)*1e3)}var fs;function readFileSync(filename,options){if(fs===undefined)fs=require("fs");return parse(fs.readFileSync(filename),options)}function readSync(blob,options){switch(options!==undefined&&options.type!==undefined?options.type:"base64"){case"file":return readFileSync(blob,options);case"base64":return parse(s2a(Base64.decode(blob)),options);case"binary":return parse(s2a(blob),options)}return parse(blob)}var MSSZ=64;var ENDOFCHAIN=-2;var HEADER_SIGNATURE="d0cf11e0a1b11ae1";var HEADER_CLSID="00000000000000000000000000000000";var consts={MAXREGSECT:-6,DIFSECT:-4,FATSECT:-3,ENDOFCHAIN:ENDOFCHAIN,FREESECT:-1,HEADER_SIGNATURE:HEADER_SIGNATURE,HEADER_MINOR_VERSION:"3e00",MAXREGSID:-6,NOSTREAM:-1,HEADER_CLSID:HEADER_CLSID,EntryTypes:["unknown","storage","stream","lockbytes","property","root"]};exports.read=readSync;exports.parse=parse;exports.utils={ReadShift:ReadShift,CheckField:CheckField,prep_blob:prep_blob,bconcat:bconcat,consts:consts};return exports}();if(typeof require!=="undefined"&&typeof module!=="undefined"&&typeof DO_NOT_EXPORT_CFB==="undefined"){module.exports=CFB}
|