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GeezerVison is showing github.com — js-cfb/xlscfb.flow.js at master · SheetJS/js-cfb Expand file tree/ Copy pathxlscfb.flow.jsMore file actions 1856 lines (1670 loc) · 59.2 KB / Copy pathxlscfb.flow.jsFile metadata and controls1856 lines (1670 loc) · 59.2 KB 1 2 3 4 5 6 7 8 9 10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25 26 27 28 29 30 31 32 33 34 35 36 37 38 39 40 41 42 43 44 45 46 47 48 49 50 51 52 53 54 55 56 57 58 59 60 61 62 63 64 65 66 67 68 69 70 71 72 73 74 75 76 77 78 79 80 81 82 83 84 85 86 87 88 89 90 91 92 93 94 95 96 97 98 99 100 101 102 103 104 105 106 107 108 109 110 111 112 113 114 115 116 117 118 119 120 121 122 123 124 125 126 127 128 129 130 131 132 133 134 135 136 137 138 139 140 141 142 143 144 145 146 147 148 149 150 151 152 153 154 155 156 157 158 159 160 161 162 163 164 165 166 167 168 169 170 171 172 173 174 175 176 177 178 179 180 181 182 183 184 185 186 187 188 189 190 191 192 193 194 195 196 197 198 199 200 201 202 203 204 205 206 207 208 209 210 211 212 213 214 215 216 217 218 219 220 221 222 223 224 225 226 227 228 229 230 231 232 233 234 235 236 237 238 239 240 241 242 243 244 245 246 247 248 249 250 251 252 253 254 255 256 257 258 259 260 261 262 263 264 265 266 267 268 269 270 271 272 273 274 275 276 277 278 279 280 281 282 283 284 285 286 287 288 289 290 291 292 293 294 295 296 297 298 299 300 301 302 303 304 305 306 307 308 309 310 311 312 313 314 315 316 317 318 319 320 321 322 323 324 325 326 327 328 329 330 331 332 333 334 335 336 337 338 339 340 341 342 343 344 345 346 347 348 349 350 351 352 353 354 355 356 357 358 359 360 361 362 363 364 365 366 367 368 369 370 371 372 373 374 375 376 377 378 379 380 381 382 383 384 385 386 387 388 389 390 391 392 393 394 395 396 397 398 399 400 401 402 403 404 405 406 407 408 409 410 411 412 413 414 415 416 417 418 419 420 421 422 423 424 425 426 427 428 429 430 431 432 433 434 435 436 437 438 439 440 441 442 443 444 445 446 447 448 449 450 451 452 453 454 455 456 457 458 459 460 461 462 463 464 465 466 467 468 469 470 471 472 473 474 475 476 477 478 479 480 481 482 483 484 485 486 487 488 489 490 491 492 493 494 495 496 497 498 499 500 501 502 503 504 505 506 507 508 509 510 511 512 513 514 515 516 517 518 519 520 521 522 523 524 525 526 527 528 529 530 531 532 533 534 535 536 537 538 539 540 541 542 543 544 545 546 547 548 549 550 551 552 553 554 555 556 557 558 559 560 561 562 563 564 565 566 567 568 569 570 571 572 573 574 575 576 577 578 579 580 581 582 583 584 585 586 587 588 589 590 591 592 593 594 595 596 597 598 599 600 601 602 603 604 605 606 607 608 609 610 611 612 613 614 615 616 617 618 619 620 621 622 623 624 625 626 627 628 629 630 631 632 633 634 635 636 637 638 639 640 641 642 643 644 645 646 647 648 649 650 651 652 653 654 655 656 657 658 659 660 661 662 663 664 665 666 667 668 669 670 671 672 673 674 675 676 677 678 679 680 681 682 683 684 685 686 687 688 689 690 691 692 693 694 695 696 697 698 699 700 701 702 703 704 705 706 707 708 709 710 711 712 713 714 715 716 717 718 719 720 721 722 723 724 725 726 727 728 729 730 731 732 733 734 735 736 737 738 739 740 741 742 743 744 745 746 747 748 749 750 751 752 753 754 755 756 757 758 759 760 761 762 763 764 765 766 767 768 769 770 771 772 773 774 775 776 777 778 779 780 781 782 783 784 785 786 787 788 789 790 791 792 793 794 795 796 797 798 799 800 801 802 803 804 805 806 807 808 809 810 811 812 813 814 815 816 817 818 819 820 821 822 823 824 825 826 827 828 829 830 831 832 833 834 835 836 837 838 839 840 841 842 843 844 845 846 847 848 849 850 851 852 853 854 855 856 857 858 859 860 861 862 863 864 865 866 867 868 869 870 871 872 873 874 875 876 877 878 879 880 881 882 883 884 885 886 887 888 889 890 891 892 893 894 895 896 897 898 899 900 901 902 903 904 905 906 907 908 909 910 911 912 913 914 915 916 917 918 919 920 921 922 923 924 925 926 927 928 929 930 931 932 933 934 935 936 937 938 939 940 941 942 943 944 945 946 947 948 949 950 951 952 953 954 955 956 957 958 959 960 961 962 963 964 965 966 967 968 969 970 971 972 973 974 975 976 977 978 979 980 981 982 983 984 985 986 987 988 989 990 991 992 993 994 995 996 997 998 999 1000 /*:: declare var ReadShift:any; declare var CheckField:any; declare var prep_blob:any; declare var __readUInt32LE:any; declare var __readInt32LE:any; declare var __toBuffer:any; declare var __utf16le:any; declare var bconcat:any; declare var s2a:any; declare var chr0:any; declare var chr1:any; declare var has_buf:boolean; declare var new_buf:any; declare var new_raw_buf:any; declare var new_unsafe_buf:any; declare var Buffer_from:any; */ /* cfb.js (C) 2013-present SheetJS -- http://sheetjs.com */ /* vim: set ts=2: */ /*jshint eqnull:true */ /*exported CFB */ /*global module, require:false, process:false, Buffer:false, Uint8Array:false, Uint16Array:false */ /*:: type SectorEntry = { name?:string; nodes?:Array<number>; data:RawBytes; }; type SectorList = { [k:string|number]:SectorEntry; name:?string; fat_addrs:Array<number>; ssz:number; } type CFBFiles = {[n:string]:CFBEntry}; */ /*! crc32.js (C) 2014-present SheetJS -- http://sheetjs.com */ /* vim: set ts=2: */ /*exported CRC32 */ var CRC32 = /*#__PURE__*/(function() { var CRC32 = {}; CRC32.version = '1.2.1'; /*:: type ABuf = Array<number> | Buffer | Uint8Array; type CRC32TableType = Array<number> | Int32Array; */ /*global Int32Array */ function signed_crc_table()/*:CRC32TableType*/ { var c = 0, table/*:Array<number>*/ = new Array(256); for(var n =0; n != 256; ++n){ c = n; c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); c = ((c&1) ? (-306674912 ^ (c >>> 1)) : (c >>> 1)); table[n] = c; } return typeof Int32Array !== 'undefined' ? new Int32Array(table) : table; } var T0 = signed_crc_table(); function slice_by_16_tables(T) { var c = 0, v = 0, n = 0, table/*:Array<number>*/ = typeof Int32Array !== 'undefined' ? new Int32Array(4096) : new Array(4096) ; for(n = 0; n != 256; ++n) table[n] = T[n]; for(n = 0; n != 256; ++n) { v = T[n]; for(c = 256 + n; c < 4096; c += 256) v = table[c] = (v >>> 8) ^ T[v & 0xFF]; } var out = []; for(n = 1; n != 16; ++n) out[n - 1] = typeof Int32Array !== 'undefined' ? table.subarray(n * 256, n * 256 + 256) : table.slice(n * 256, n * 256 + 256); return out; } var TT = slice_by_16_tables(T0); var T1 = TT[0], T2 = TT[1], T3 = TT[2], T4 = TT[3], T5 = TT[4]; var T6 = TT[5], T7 = TT[6], T8 = TT[7], T9 = TT[8], Ta = TT[9]; var Tb = TT[10], Tc = TT[11], Td = TT[12], Te = TT[13], Tf = TT[14]; function crc32_bstr(bstr/*:string*/, seed/*:?number*/)/*:number*/ { var C = seed/*:: ? 0 : 0 */ ^ -1; for(var i = 0, L = bstr.length; i < L;) C = (C>>>8) ^ T0[(C^bstr.charCodeAt(i++))&0xFF]; return ~C; } function crc32_buf(B/*:ABuf*/, seed/*:?number*/)/*:number*/ { var C = seed/*:: ? 0 : 0 */ ^ -1, L = B.length - 15, i = 0; for(; i < L;) C = Tf[B[i++] ^ (C & 255)] ^ Te[B[i++] ^ ((C >> 8) & 255)] ^ Td[B[i++] ^ ((C >> 16) & 255)] ^ Tc[B[i++] ^ (C >>> 24)] ^ Tb[B[i++]] ^ Ta[B[i++]] ^ T9[B[i++]] ^ T8[B[i++]] ^ T7[B[i++]] ^ T6[B[i++]] ^ T5[B[i++]] ^ T4[B[i++]] ^ T3[B[i++]] ^ T2[B[i++]] ^ T1[B[i++]] ^ T0[B[i++]]; L += 15; while(i < L) C = (C>>>8) ^ T0[(C^B[i++])&0xFF]; return ~C; } function crc32_str(str/*:string*/, seed/*:?number*/)/*:number*/ { var C = seed/*:: ? 0 : 0 */ ^ -1; for(var i = 0, L = str.length, c = 0, d = 0; i < L;) { c = str.charCodeAt(i++); if(c < 0x80) { C = (C>>>8) ^ T0[(C^c)&0xFF]; } else if(c < 0x800) { C = (C>>>8) ^ T0[(C ^ (192|((c>>6)&31)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF]; } else if(c >= 0xD800 && c < 0xE000) { c = (c&1023)+64; d = str.charCodeAt(i++)&1023; C = (C>>>8) ^ T0[(C ^ (240|((c>>8)&7)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|((c>>2)&63)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|((d>>6)&15)|((c&3)<<4)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|(d&63)))&0xFF]; } else { C = (C>>>8) ^ T0[(C ^ (224|((c>>12)&15)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|((c>>6)&63)))&0xFF]; C = (C>>>8) ^ T0[(C ^ (128|(c&63)))&0xFF]; } } return ~C; } CRC32.table = T0; CRC32.bstr = crc32_bstr; CRC32.buf = crc32_buf; CRC32.str = crc32_str; return CRC32; })(); /* [MS-CFB] v20171201 */ var CFB = /*#__PURE__*/(function _CFB(){ var exports/*:CFBModule*/ = /*::(*/{}/*:: :any)*/; exports.version = '1.2.2'; /* [MS-CFB] 2.6.4 */ function namecmp(l/*:string*/, r/*:string*/)/*:number*/ { var L = l.split("/"), R = r.split("/"); for(var i = 0, c = 0, Z = Math.min(L.length, R.length); i < Z; ++i) { if((c = L[i].length - R[i].length)) return c; if(L[i] != R[i]) return L[i] < R[i] ? -1 : 1; } return L.length - R.length; } function dirname(p/*:string*/)/*:string*/ { if(p.charAt(p.length - 1) == "/") return (p.slice(0,-1).indexOf("/") === -1) ? p : dirname(p.slice(0, -1)); var c = p.lastIndexOf("/"); return (c === -1) ? p : p.slice(0, c+1); } function filename(p/*:string*/)/*:string*/ { if(p.charAt(p.length - 1) == "/") return filename(p.slice(0, -1)); var c = p.lastIndexOf("/"); return (c === -1) ? p : p.slice(c+1); } /* -------------------------------------------------------------------------- */ /* DOS Date format: high|YYYYYYYm.mmmddddd.HHHHHMMM.MMMSSSSS|low add 1980 to stored year stored second should be doubled */ /* write JS date to buf as a DOS date */ function write_dos_date(buf/*:CFBlob*/, date/*:Date|string*/) { if(typeof date === "string") date = new Date(date); var hms/*:number*/ = date.getHours(); hms = hms << 6 | date.getMinutes(); hms = hms << 5 | (date.getSeconds()>>>1); buf.write_shift(2, hms); var ymd/*:number*/ = (date.getFullYear() - 1980); ymd = ymd << 4 | (date.getMonth()+1); ymd = ymd << 5 | date.getDate(); buf.write_shift(2, ymd); } /* read four bytes from buf and interpret as a DOS date */ function parse_dos_date(buf/*:CFBlob*/)/*:Date*/ { var hms = buf.read_shift(2) & 0xFFFF; var ymd = buf.read_shift(2) & 0xFFFF; var val = new Date(); var d = ymd & 0x1F; ymd >>>= 5; var m = ymd & 0x0F; ymd >>>= 4; val.setMilliseconds(0); val.setFullYear(ymd + 1980); val.setMonth(m-1); val.setDate(d); var S = hms & 0x1F; hms >>>= 5; var M = hms & 0x3F; hms >>>= 6; val.setHours(hms); val.setMinutes(M); val.setSeconds(S<<1); return val; } function parse_extra_field(blob/*:CFBlob*/)/*:any*/ { prep_blob(blob, 0); var o = /*::(*/{}/*:: :any)*/; var flags = 0; while(blob.l <= blob.length - 4) { var type = blob.read_shift(2); var sz = blob.read_shift(2), tgt = blob.l + sz; var p = {}; switch(type) { /* UNIX-style Timestamps */ case 0x5455: { flags = blob.read_shift(1); if(flags & 1) p.mtime = blob.read_shift(4); /* for some reason, CD flag corresponds to LFH */ if(sz > 5) { if(flags & 2) p.atime = blob.read_shift(4); if(flags & 4) p.ctime = blob.read_shift(4); } if(p.mtime) p.mt = new Date(p.mtime*1000); } break; } blob.l = tgt; o[type] = p; } return o; } var fs/*:: = require('fs'); */; function get_fs() { return fs || (fs = require('fs')); } function parse(file/*:RawBytes*/, options/*:CFBReadOpts*/)/*:CFBContainer*/ { if(file[0] == 0x50 && file[1] == 0x4b) return parse_zip(file, options); if((file[0] | 0x20) == 0x6d && (file[1]|0x20) == 0x69) return parse_mad(file, options); if(file.length < 512) throw new Error("CFB file size " + file.length + " < 512"); var mver = 3; var ssz = 512; var nmfs = 0; // number of mini FAT sectors var difat_sec_cnt = 0; var dir_start = 0; var minifat_start = 0; var difat_start = 0; var fat_addrs/*:Array<number>*/ = []; // locations of FAT sectors /* [MS-CFB] 2.2 Compound File Header */ var blob/*:CFBlob*/ = /*::(*/file.slice(0,512)/*:: :any)*/; prep_blob(blob, 0); /* major version */ var mv = check_get_mver(blob); mver = mv[0]; switch(mver) { case 3: ssz = 512; break; case 4: ssz = 4096; break; case 0: if(mv[1] == 0) return parse_zip(file, options); /* falls through */ default: throw new Error("Major Version: Expected 3 or 4 saw " + mver); } /* reprocess header */ if(ssz !== 512) { blob = /*::(*/file.slice(0,ssz)/*:: :any)*/; prep_blob(blob, 28 /* blob.l */); } /* Save header for final object */ var header/*:RawBytes*/ = file.slice(0,ssz); check_shifts(blob, mver); // Number of Directory Sectors var dir_cnt/*:number*/ = blob.read_shift(4, 'i'); if(mver === 3 && dir_cnt !== 0) throw new Error('# Directory Sectors: Expected 0 saw ' + dir_cnt); // Number of FAT Sectors blob.l += 4; // First Directory Sector Location dir_start = blob.read_shift(4, 'i'); // Transaction Signature blob.l += 4; // Mini Stream Cutoff Size blob.chk('00100000', 'Mini Stream Cutoff Size: '); // First Mini FAT Sector Location minifat_start = blob.read_shift(4, 'i'); // Number of Mini FAT Sectors nmfs = blob.read_shift(4, 'i'); // First DIFAT sector location difat_start = blob.read_shift(4, 'i'); // Number of DIFAT Sectors difat_sec_cnt = blob.read_shift(4, 'i'); // Grab FAT Sector Locations for(var q = -1, j = 0; j < 109; ++j) { /* 109 = (512 - blob.l)>>>2; */ q = blob.read_shift(4, 'i'); if(q<0) break; fat_addrs[j] = q; } /** Break the file up into sectors */ var sectors/*:Array<RawBytes>*/ = sectorify(file, ssz); sleuth_fat(difat_start, difat_sec_cnt, sectors, ssz, fat_addrs); /** Chains */ var sector_list/*:SectorList*/ = 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; /* [MS-CFB] 2.6.1 Compound File Directory Entry */ var files/*:CFBFiles*/ = {}, Paths/*:Array<string>*/ = [], FileIndex/*:CFBFileIndex*/ = [], FullPaths/*:Array<string>*/ = []; read_directory(dir_start, sector_list, sectors, Paths, nmfs, files, FileIndex, minifat_start); build_full_paths(FileIndex, FullPaths, Paths); Paths.shift(); var o = { FileIndex: FileIndex, FullPaths: FullPaths }; // $FlowIgnore if(options && options.raw) o.raw = {header: header, sectors: sectors}; return o; } // parse /* [MS-CFB] 2.2 Compound File Header -- read up to major version */ function check_get_mver(blob/*:CFBlob*/)/*:[number, number]*/ { if(blob[blob.l] == 0x50 && blob[blob.l + 1] == 0x4b) return [0, 0]; // header signature 8 blob.chk(HEADER_SIGNATURE, 'Header Signature: '); // clsid 16 //blob.chk(HEADER_CLSID, 'CLSID: '); blob.l += 16; // minor version 2 var mver/*:number*/ = blob.read_shift(2, 'u'); return [blob.read_shift(2,'u'), mver]; } function check_shifts(blob/*:CFBlob*/, mver/*:number*/)/*:void*/ { var shift = 0x09; // Byte Order //blob.chk('feff', 'Byte Order: '); // note: some writers put 0xffff blob.l += 2; // Sector Shift switch((shift = blob.read_shift(2))) { case 0x09: if(mver != 3) throw new Error('Sector Shift: Expected 9 saw ' + shift); break; case 0x0c: if(mver != 4) throw new Error('Sector Shift: Expected 12 saw ' + shift); break; default: throw new Error('Sector Shift: Expected 9 or 12 saw ' + shift); } // Mini Sector Shift blob.chk('0600', 'Mini Sector Shift: '); // Reserved blob.chk('000000000000', 'Reserved: '); } /** Break the file up into sectors */ function sectorify(file/*:RawBytes*/, ssz/*:number*/)/*:Array<RawBytes>*/ { var nsectors = Math.ceil(file.length/ssz)-1; var sectors/*:Array<RawBytes>*/ = []; 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; } /* [MS-CFB] 2.6.4 Red-Black Tree */ function build_full_paths(FI/*:CFBFileIndex*/, FP/*:Array<string>*/, Paths/*:Array<string>*/)/*:void*/ { var i = 0, L = 0, R = 0, C = 0, j = 0, pl = Paths.length; var dad/*:Array<number>*/ = [], q/*:Array<number>*/ = []; 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 /*NOSTREAM*/ && dad[L] !== L) dad[i] = dad[L]; if(R !== -1 && dad[R] !== R) dad[i] = dad[R]; } if(C !== -1 /*NOSTREAM*/) dad[C] = i; if(L !== -1 && i != dad[i]) { dad[L] = dad[i]; if(q.lastIndexOf(L) < j) q.push(L); } if(R !== -1 && i != dad[i]) { dad[R] = dad[i]; if(q.lastIndexOf(R) < j) q.push(R); } } for(i=1; i < pl; ++i) if(dad[i] === i) { if(R !== -1 /*NOSTREAM*/ && 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 /* unknown */) continue; j = i; if(j != dad[j]) do { j = dad[j]; FP[i] = FP[j] + "/" + FP[i]; } while (j !== 0 && -1 !== dad[j] && j != dad[j]); dad[i] = -1; } FP[0] += "/"; for(i=1; i < pl; ++i) { if(FI[i].type !== 2 /* stream */) FP[i] += "/"; } } function get_mfat_entry(entry/*:CFBEntry*/, payload/*:RawBytes*/, mini/*:?RawBytes*/)/*:CFBlob*/ { var start = entry.start, size = entry.size; //return (payload.slice(start*MSSZ, start*MSSZ + size)/*:any*/); var o = []; var idx = start; while(mini && size > 0 && idx >= 0) { o.push(payload.slice(idx * MSSZ, idx * MSSZ + MSSZ)); size -= MSSZ; idx = __readInt32LE(mini, idx * 4); } if(o.length === 0) return (new_buf(0)/*:any*/); return (bconcat(o).slice(0, entry.size)/*:any*/); } /** Chase down the rest of the DIFAT chain to build a comprehensive list DIFAT chains by storing the next sector number as the last 32 bits */ function sleuth_fat(idx/*:number*/, cnt/*:number*/, sectors/*:Array<RawBytes>*/, ssz/*:number*/, fat_addrs)/*:void*/ { var q/*:number*/ = ENDOFCHAIN; if(idx === ENDOFCHAIN) { if(cnt !== 0) throw new Error("DIFAT chain shorter than expected"); } else if(idx !== -1 /*FREESECT*/) { var sector = sectors[idx], m = (ssz>>>2)-1; if(!sector) return; for(var i = 0; i < m; ++i) { if((q = __readInt32LE(sector,i*4)) === ENDOFCHAIN) break; fat_addrs.push(q); } if(cnt >= 1) sleuth_fat(__readInt32LE(sector,ssz-4),cnt - 1, sectors, ssz, fat_addrs); } } /** Follow the linked list of sectors for a given starting point */ function get_sector_list(sectors/*:Array<RawBytes>*/, start/*:number*/, fat_addrs/*:Array<number>*/, ssz/*:number*/, chkd/*:?Array<boolean>*/)/*:SectorEntry*/ { var buf/*:Array<number>*/ = [], buf_chain/*:Array<any>*/ = []; if(!chkd) chkd = []; var modulus = ssz - 1, j = 0, jj = 0; 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 new Error("FAT boundary crossed: " + j + " 4 "+ssz); if(!sectors[addr]) break; j = __readInt32LE(sectors[addr], jj); } return {nodes: buf, data:__toBuffer([buf_chain])}; } /** Chase down the sector linked lists */ function make_sector_list(sectors/*:Array<RawBytes>*/, dir_start/*:number*/, fat_addrs/*:Array<number>*/, ssz/*:number*/)/*:SectorList*/ { var sl = sectors.length, sector_list/*:SectorList*/ = ([]/*:any*/); var chkd/*:Array<boolean>*/ = [], buf/*:Array<number>*/ = [], buf_chain/*:Array<RawBytes>*/ = []; var modulus = ssz - 1, i=0, j=0, k=0, jj=0; for(i=0; i < sl; ++i) { buf = ([]/*:Array<number>*/); k = (i + dir_start); if(k >= sl) k-=sl; if(chkd[k]) continue; buf_chain = []; var seen = []; for(j=k; j>=0;) { seen[j] = true; chkd[j] = true; buf[buf.length] = j; buf_chain.push(sectors[j]); var addr/*:number*/ = fat_addrs[Math.floor(j*4/ssz)]; jj = ((j*4) & modulus); if(ssz < 4 + jj) throw new Error("FAT boundary crossed: " + j + " 4 "+ssz); if(!sectors[addr]) break; j = __readInt32LE(sectors[addr], jj); if(seen[j]) break; } sector_list[k] = ({nodes: buf, data:__toBuffer([buf_chain])}/*:SectorEntry*/); } return sector_list; } /* [MS-CFB] 2.6.1 Compound File Directory Entry */ function read_directory(dir_start/*:number*/, sector_list/*:SectorList*/, sectors/*:Array<RawBytes>*/, Paths/*:Array<string>*/, nmfs, files, FileIndex, mini) { var minifat_store = 0, pl = (Paths.length?2:0); var sector = sector_list[dir_start].data; var i = 0, namelen = 0, name; for(; i < sector.length; i+= 128) { var blob/*:CFBlob*/ = /*::(*/sector.slice(i, i+128)/*:: :any)*/; prep_blob(blob, 64); namelen = blob.read_shift(2); name = __utf16le(blob,0,namelen-pl); Paths.push(name); var o/*:CFBEntry*/ = ({ 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'), start: 0, size: 0 }); var ctime/*:number*/ = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2); if(ctime !== 0) o.ct = read_date(blob, blob.l-8); var mtime/*:number*/ = blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2) + blob.read_shift(2); if(mtime !== 0) o.mt = read_date(blob, blob.l-8); o.start = blob.read_shift(4, 'i'); o.size = blob.read_shift(4, 'i'); if(o.size < 0 && o.start < 0) { o.size = o.type = 0; o.start = ENDOFCHAIN; o.name = ""; } if(o.type === 5) { /* root */ minifat_store = o.start; if(nmfs > 0 && minifat_store !== ENDOFCHAIN) sector_list[minifat_store].name = "!StreamData"; /*minifat_size = o.size;*/ } else if(o.size >= 4096 /* MSCSZ */) { 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)/*:any*/); } else { o.storage = 'minifat'; if(o.size < 0) o.size = 0; else if(minifat_store !== ENDOFCHAIN && o.start !== ENDOFCHAIN && sector_list[minifat_store]) { o.content = get_mfat_entry(o, sector_list[minifat_store].data, (sector_list[mini]||{}).data); } } if(o.content) prep_blob(o.content, 0); files[name] = o; FileIndex.push(o); } } function read_date(blob/*:RawBytes|CFBlob*/, offset/*:number*/)/*:Date*/ { return new Date(( ( (__readUInt32LE(blob,offset+4)/1e7)*Math.pow(2,32)+__readUInt32LE(blob,offset)/1e7 ) - 11644473600)*1000); } function read_file(filename/*:string*/, options/*:CFBReadOpts*/) { get_fs(); return parse(fs.readFileSync(filename), options); } function read(blob/*:RawBytes|string*/, options/*:CFBReadOpts*/) { var type = options && options.type; if(!type) { if(has_buf && Buffer.isBuffer(blob)) type = "buffer"; } switch(type || "base64") { case "file": /*:: if(typeof blob !== 'string') throw "Must pass a filename when type='file'"; */return read_file(blob, options); case "base64": /*:: if(typeof blob !== 'string') throw "Must pass a base64-encoded binary string when type='file'"; */return parse(s2a(Base64_decode(blob)), options); case "binary": /*:: if(typeof blob !== 'string') throw "Must pass a binary string when type='file'"; */return parse(s2a(blob), options); } return parse(/*::typeof blob == 'string' ? new Buffer(blob, 'utf-8') : */blob, options); } function init_cfb(cfb/*:CFBContainer*/, opts/*:?any*/)/*:void*/ { var o = opts || {}, root = o.root || "Root Entry"; if(!cfb.FullPaths) cfb.FullPaths = []; if(!cfb.FileIndex) cfb.FileIndex = []; if(cfb.FullPaths.length !== cfb.FileIndex.length) throw new Error("inconsistent CFB structure"); if(cfb.FullPaths.length === 0) { cfb.FullPaths[0] = root + "/"; cfb.FileIndex[0] = ({ name: root, type: 5 }/*:any*/); } if(o.CLSID) cfb.FileIndex[0].clsid = o.CLSID; seed_cfb(cfb); } function seed_cfb(cfb/*:CFBContainer*/)/*:void*/ { var nm = "\u0001Sh33tJ5"; if(CFB.find(cfb, "/" + nm)) return; var p = new_buf(4); p[0] = 55; p[1] = p[3] = 50; p[2] = 54; cfb.FileIndex.push(({ name: nm, type: 2, content:p, size:4, L:69, R:69, C:69 }/*:any*/)); cfb.FullPaths.push(cfb.FullPaths[0] + nm); rebuild_cfb(cfb); } function rebuild_cfb(cfb/*:CFBContainer*/, f/*:?boolean*/)/*:void*/ { init_cfb(cfb); var gc = false, s = false; for(var i = cfb.FullPaths.length - 1; i >= 0; --i) { var _file = cfb.FileIndex[i]; switch(_file.type) { case 0: if(s) gc = true; else { cfb.FileIndex.pop(); cfb.FullPaths.pop(); } break; case 1: case 2: case 5: s = true; if(isNaN(_file.R * _file.L * _file.C)) gc = true; if(_file.R > -1 && _file.L > -1 && _file.R == _file.L) gc = true; break; default: gc = true; break; } } if(!gc && !f) return; var now = new Date(1987, 1, 19), j = 0; // Track which names exist var fullPaths = Object.create ? Object.create(null) : {}; var data/*:Array<[string, CFBEntry]>*/ = []; for(i = 0; i < cfb.FullPaths.length; ++i) { fullPaths[cfb.FullPaths[i]] = true; if(cfb.FileIndex[i].type === 0) continue; data.push([cfb.FullPaths[i], cfb.FileIndex[i]]); } for(i = 0; i < data.length; ++i) { var dad = dirname(data[i][0]); s = fullPaths[dad]; while(!s) { while(dirname(dad) && !fullPaths[dirname(dad)]) dad = dirname(dad); data.push([dad, ({ name: filename(dad).replace("/",""), type: 1, clsid: HEADER_CLSID, ct: now, mt: now, content: null }/*:any*/)]); // Add name to set fullPaths[dad] = true; dad = dirname(data[i][0]); s = fullPaths[dad]; } } data.sort(function(x,y) { return namecmp(x[0], y[0]); }); cfb.FullPaths = []; cfb.FileIndex = []; for(i = 0; i < data.length; ++i) { cfb.FullPaths[i] = data[i][0]; cfb.FileIndex[i] = data[i][1]; } for(i = 0; i < data.length; ++i) { var elt = cfb.FileIndex[i]; var nm = cfb.FullPaths[i]; elt.name = filename(nm).replace("/",""); elt.L = elt.R = elt.C = -(elt.color = 1); elt.size = elt.content ? elt.content.length : 0; elt.start = 0; elt.clsid = (elt.clsid || HEADER_CLSID); if(i === 0) { elt.C = data.length > 1 ? 1 : -1; elt.size = 0; elt.type = 5; } else if(nm.slice(-1) == "/") { for(j=i+1;j < data.length; ++j) if(dirname(cfb.FullPaths[j])==nm) break; elt.C = j >= data.length ? -1 : j; for(j=i+1;j < data.length; ++j) if(dirname(cfb.FullPaths[j])==dirname(nm)) break; elt.R = j >= data.length ? -1 : j; elt.type = 1; } else { if(dirname(cfb.FullPaths[i+1]||"") == dirname(nm)) elt.R = i + 1; elt.type = 2; } } } function _write(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes|string*/ { var _opts = options || {}; /* MAD is order-sensitive, skip rebuild and sort */ if(_opts.fileType == 'mad') return write_mad(cfb, _opts); rebuild_cfb(cfb); switch(_opts.fileType) { case 'zip': return write_zip(cfb, _opts); //case 'mad': return write_mad(cfb, _opts); } var L = (function(cfb/*:CFBContainer*/)/*:Array<number>*/{ var mini_size = 0, fat_size = 0; for(var i = 0; i < cfb.FileIndex.length; ++i) { var file = cfb.FileIndex[i]; if(!file.content) continue; var flen = file.content.length; if(flen > 0){ if(flen < 0x1000) mini_size += (flen + 0x3F) >> 6; else fat_size += (flen + 0x01FF) >> 9; } } var dir_cnt = (cfb.FullPaths.length +3) >> 2; var mini_cnt = (mini_size + 7) >> 3; var mfat_cnt = (mini_size + 0x7F) >> 7; var fat_base = mini_cnt + fat_size + dir_cnt + mfat_cnt; var fat_cnt = (fat_base + 0x7F) >> 7; var difat_cnt = fat_cnt <= 109 ? 0 : Math.ceil((fat_cnt-109)/0x7F); while(((fat_base + fat_cnt + difat_cnt + 0x7F) >> 7) > fat_cnt) difat_cnt = ++fat_cnt <= 109 ? 0 : Math.ceil((fat_cnt-109)/0x7F); var L = [1, difat_cnt, fat_cnt, mfat_cnt, dir_cnt, fat_size, mini_size, 0]; cfb.FileIndex[0].size = mini_size << 6; L[7] = (cfb.FileIndex[0].start=L[0]+L[1]+L[2]+L[3]+L[4]+L[5])+((L[6]+7) >> 3); return L; })(cfb); var o = new_buf(L[7] << 9); var i = 0, T = 0; { for(i = 0; i < 8; ++i) o.write_shift(1, HEADER_SIG[i]); for(i = 0; i < 8; ++i) o.write_shift(2, 0); o.write_shift(2, 0x003E); o.write_shift(2, 0x0003); o.write_shift(2, 0xFFFE); o.write_shift(2, 0x0009); o.write_shift(2, 0x0006); for(i = 0; i < 3; ++i) o.write_shift(2, 0); o.write_shift(4, 0); o.write_shift(4, L[2]); o.write_shift(4, L[0] + L[1] + L[2] + L[3] - 1); o.write_shift(4, 0); o.write_shift(4, 1<<12); o.write_shift(4, L[3] ? L[0] + L[1] + L[2] - 1: ENDOFCHAIN); o.write_shift(4, L[3]); o.write_shift(-4, L[1] ? L[0] - 1: ENDOFCHAIN); o.write_shift(4, L[1]); for(i = 0; i < 109; ++i) o.write_shift(-4, i < L[2] ? L[1] + i : -1); } if(L[1]) { for(T = 0; T < L[1]; ++T) { for(; i < 236 + T * 127; ++i) o.write_shift(-4, i < L[2] ? L[1] + i : -1); o.write_shift(-4, T === L[1] - 1 ? ENDOFCHAIN : T + 1); } } var chainit = function(w/*:number*/)/*:void*/ { for(T += w; i<T-1; ++i) o.write_shift(-4, i+1); if(w) { ++i; o.write_shift(-4, ENDOFCHAIN); } }; T = i = 0; for(T+=L[1]; i<T; ++i) o.write_shift(-4, consts.DIFSECT); for(T+=L[2]; i<T; ++i) o.write_shift(-4, consts.FATSECT); chainit(L[3]); chainit(L[4]); var j/*:number*/ = 0, flen/*:number*/ = 0; var file/*:CFBEntry*/ = cfb.FileIndex[0]; for(; j < cfb.FileIndex.length; ++j) { file = cfb.FileIndex[j]; if(!file.content) continue; /*:: if(file.content == null) throw new Error("unreachable"); */ flen = file.content.length; if(flen < 0x1000) continue; file.start = T; chainit((flen + 0x01FF) >> 9); } chainit((L[6] + 7) >> 3); while(o.l & 0x1FF) o.write_shift(-4, consts.ENDOFCHAIN); T = i = 0; for(j = 0; j < cfb.FileIndex.length; ++j) { file = cfb.FileIndex[j]; if(!file.content) continue; /*:: if(file.content == null) throw new Error("unreachable"); */ flen = file.content.length; if(!flen || flen >= 0x1000) continue; file.start = T; chainit((flen + 0x3F) >> 6); } while(o.l & 0x1FF) o.write_shift(-4, consts.ENDOFCHAIN); for(i = 0; i < L[4]<<2; ++i) { var nm = cfb.FullPaths[i]; if(!nm || nm.length === 0) { for(j = 0; j < 17; ++j) o.write_shift(4, 0); for(j = 0; j < 3; ++j) o.write_shift(4, -1); for(j = 0; j < 12; ++j) o.write_shift(4, 0); continue; } file = cfb.FileIndex[i]; if(i === 0) file.start = file.size ? file.start - 1 : ENDOFCHAIN; var _nm/*:string*/ = (i === 0 && _opts.root) || file.name; if(_nm.length > 32) { console.error("Name " + _nm + " will be truncated to " + _nm.slice(0,32)); _nm = _nm.slice(0, 32); } flen = 2*(_nm.length+1); o.write_shift(64, _nm, "utf16le"); o.write_shift(2, flen); o.write_shift(1, file.type); o.write_shift(1, file.color); o.write_shift(-4, file.L); o.write_shift(-4, file.R); o.write_shift(-4, file.C); if(!file.clsid) for(j = 0; j < 4; ++j) o.write_shift(4, 0); else o.write_shift(16, file.clsid, "hex"); o.write_shift(4, file.state || 0); o.write_shift(4, 0); o.write_shift(4, 0); o.write_shift(4, 0); o.write_shift(4, 0); o.write_shift(4, file.start); o.write_shift(4, file.size); o.write_shift(4, 0); } for(i = 1; i < cfb.FileIndex.length; ++i) { file = cfb.FileIndex[i]; /*:: if(!file.content) throw new Error("unreachable"); */ if(file.size >= 0x1000) { o.l = (file.start+1) << 9; if (has_buf && Buffer.isBuffer(file.content)) { file.content.copy(o, o.l, 0, file.size); // o is a 0-filled Buffer so just set next offset o.l += (file.size + 511) & -512; } else { for(j = 0; j < file.size; ++j) o.write_shift(1, file.content[j]); for(; j & 0x1FF; ++j) o.write_shift(1, 0); } } } for(i = 1; i < cfb.FileIndex.length; ++i) { file = cfb.FileIndex[i]; /*:: if(!file.content) throw new Error("unreachable"); */ if(file.size > 0 && file.size < 0x1000) { if (has_buf && Buffer.isBuffer(file.content)) { file.content.copy(o, o.l, 0, file.size); // o is a 0-filled Buffer so just set next offset o.l += (file.size + 63) & -64; } else { for(j = 0; j < file.size; ++j) o.write_shift(1, file.content[j]); for(; j & 0x3F; ++j) o.write_shift(1, 0); } } } if (has_buf) { o.l = o.length; } else { // When using Buffer, already 0-filled while(o.l < o.length) o.write_shift(1, 0); } return o; } /* [MS-CFB] 2.6.4 (Unicode 3.0.1 case conversion) */ function find(cfb/*:CFBContainer*/, path/*:string*/)/*:?CFBEntry*/ { var UCFullPaths/*:Array<string>*/ = cfb.FullPaths.map(function(x) { return x.toUpperCase(); }); var UCPaths/*:Array<string>*/ = UCFullPaths.map(function(x) { var y = x.split("/"); return y[y.length - (x.slice(-1) == "/" ? 2 : 1)]; }); var k/*:boolean*/ = false; if(path.charCodeAt(0) === 47 /* "/" */) { k = true; path = UCFullPaths[0].slice(0, -1) + path; } else k = path.indexOf("/") !== -1; var UCPath/*:string*/ = path.toUpperCase(); var w/*:number*/ = k === true ? UCFullPaths.indexOf(UCPath) : UCPaths.indexOf(UCPath); if(w !== -1) return cfb.FileIndex[w]; var m = !UCPath.match(chr1); UCPath = UCPath.replace(chr0,''); if(m) UCPath = UCPath.replace(chr1,'!'); for(w = 0; w < UCFullPaths.length; ++w) { if((m ? UCFullPaths[w].replace(chr1,'!') : UCFullPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w]; if((m ? UCPaths[w].replace(chr1,'!') : UCPaths[w]).replace(chr0,'') == UCPath) return cfb.FileIndex[w]; } return null; } /** CFB Constants */ var MSSZ = 64; /* Mini Sector Size = 1<<6 */ //var MSCSZ = 4096; /* Mini Stream Cutoff Size */ /* 2.1 Compound File Sector Numbers and Types */ var ENDOFCHAIN = -2; /* 2.2 Compound File Header */ var HEADER_SIGNATURE = 'd0cf11e0a1b11ae1'; var HEADER_SIG = [0xD0, 0xCF, 0x11, 0xE0, 0xA1, 0xB1, 0x1A, 0xE1]; var HEADER_CLSID = '00000000000000000000000000000000'; var consts = { /* 2.1 Compund File Sector Numbers and Types */ MAXREGSECT: -6, DIFSECT: -4, FATSECT: -3, ENDOFCHAIN: ENDOFCHAIN, FREESECT: -1, /* 2.2 Compound File Header */ HEADER_SIGNATURE: HEADER_SIGNATURE, HEADER_MINOR_VERSION: '3e00', MAXREGSID: -6, NOSTREAM: -1, HEADER_CLSID: HEADER_CLSID, /* 2.6.1 Compound File Directory Entry */ EntryTypes: ['unknown','storage','stream','lockbytes','property','root'] }; function write_file(cfb/*:CFBContainer*/, filename/*:string*/, options/*:CFBWriteOpts*/)/*:void*/ { get_fs(); var o = _write(cfb, options); /*:: if(typeof Buffer == 'undefined' || !Buffer.isBuffer(o) || !(o instanceof Buffer)) throw new Error("unreachable"); */ fs.writeFileSync(filename, o); } function a2s(o/*:RawBytes*/)/*:string*/ { var out = new Array(o.length); for(var i = 0; i < o.length; ++i) out[i] = String.fromCharCode(o[i]); return out.join(""); } function write(cfb/*:CFBContainer*/, options/*:CFBWriteOpts*/)/*:RawBytes|string*/ { var o = _write(cfb, options); switch(options && options.type || "buffer") { case "file": get_fs(); fs.writeFileSync(options.filename, (o/*:any*/)); return o; case "binary": return typeof o == "string" ? o : a2s(o); case "base64": return Base64_encode(typeof o == "string" ? o : a2s(o)); case "buffer": if(has_buf) return Buffer.isBuffer(o) ? o : Buffer_from(o); /* falls through */ case "array": return typeof o == "string" ? s2a(o) : o; } return o; } /* node < 8.1 zlib does not expose bytesRead, so default to pure JS */ var _zlib; function use_zlib(zlib) { try { var InflateRaw = zlib.InflateRaw; var InflRaw = new InflateRaw(); InflRaw._processChunk(new Uint8Array([3, 0]), InflRaw._finishFlushFlag); if(InflRaw.bytesRead) _zlib = zlib; else throw new Error("zlib does not expose bytesRead"); } catch(e) {console.error("cannot use native zlib: " + (e.message || e)); } } function _inflateRawSync(payload, usz) { if(!_zlib) return _inflate(payload, usz); var InflateRaw = _zlib.InflateRaw; var InflRaw = new InflateRaw(); var out = InflRaw._processChunk(payload.slice(payload.l), InflRaw._finishFlushFlag); payload.l += InflRaw.bytesRead; return out; } function _deflateRawSync(payload) { return _zlib ? _zlib.deflateRawSync(payload) : _deflate(payload); } var CLEN_ORDER = [ 16, 17, 18, 0, 8, 7, 9, 6, 10, 5, 11, 4, 12, 3, 13, 2, 14, 1, 15 ]; /* LEN_ID = [ 257, 258, 259, 260, 261, 262, 263, 264, 265, 266, 267, 268, 269, 270, 271, 272, 273, 274, 275, 276, 277, 278, 279, 280, 281, 282, 283, 284, 285 ]; */ var LEN_LN = [ 3, 4, 5, 6, 7, 8, 9, 10, 11, 13 , 15, 17, 19, 23, 27, 31, 35, 43, 51, 59, 67, 83, 99, 115, 131, 163, 195, 227, 258 ]; /* DST_ID = [ 0, 1, 2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21, 22, 23, 24, 25, 26, 27, 28, 29 ]; */ var DST_LN = [ 1, 2, 3, 4, 5, 7, 9, 13, 17, 25, 33, 49, 65, 97, 129, 193, 257, 385, 513, 769, 1025, 1537, 2049, 3073, 4097, 6145, 8193, 12289, 16385, 24577 ]; function bit_swap_8(n) { var t = (((((n<<1)|(n<<11)) & 0x22110) | (((n<<5)|(n<<15)) & 0x88440))); return ((t>>16) | (t>>8) |t)&0xFF; } var use_typed_arrays = typeof Uint8Array !== 'undefined'; var bitswap8 = use_typed_arrays ? new Uint8Array(1<<8) : []; for(var q = 0; q < (1<<8); ++q) bitswap8[q] = bit_swap_8(q); function bit_swap_n(n, b) { var rev = bitswap8[n & 0xFF]; if(b <= 8) return rev >>> (8-b); rev = (rev << 8) | bitswap8[(n>>8)&0xFF]; if(b <= 16) return rev >>> (16-b); rev = (rev << 8) | bitswap8[(n>>16)&0xFF]; return rev >>> (24-b); } /* helpers for unaligned bit reads */ function read_bits_2(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 6 ? 0 : buf[h+1]<<8))>>>w)& 0x03; } function read_bits_3(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 5 ? 0 : buf[h+1]<<8))>>>w)& 0x07; } function read_bits_4(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 4 ? 0 : buf[h+1]<<8))>>>w)& 0x0F; } function read_bits_5(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 3 ? 0 : buf[h+1]<<8))>>>w)& 0x1F; } function read_bits_7(buf, bl) { var w = (bl&7), h = (bl>>>3); return ((buf[h]|(w <= 1 ? 0 : buf[h+1]<<8))>>>w)& 0x7F; } /* works up to n = 3 * 8 + 1 = 25 */ function read_bits_n(buf, bl, n) { var w = (bl&7), h = (bl>>>3), f = ((1<<n)-1); var v = buf[h] >>> w; if(n < 8 - w) return v & f; v |= buf[h+1]<<(8-w); if(n < 16 - w) return v & f; v |= buf[h+2]<<(16-w); if(n < 24 - w) return v & f; v |= buf[h+3]<<(24-w); return v & f; } /* helpers for unaligned bit writes */ function write_bits_3(buf, bl, v) { var w = bl & 7, h = bl >>> 3; if(w <= 5) buf[h] |= (v & 7) << w; else { buf[h] |= (v << w) & 0xFF; buf[h+1] = (v&7) >> (8-w); } return bl + 3; } function write_bits_1(buf, bl, v) { var w = bl & 7, h = bl >>> 3; v = (v&1) << w; buf[h] |= v; return bl + 1; } function write_bits_8(buf, bl, v) { var w = bl & 7, h = bl >>> 3; v <<= w; buf[h] |= v & 0xFF; v >>>= 8; buf[h+1] = v; return bl + 8; } function write_bits_16(buf, bl, v) { var w = bl & 7, h = bl >>> 3; v <<= w; buf[h] |= v & 0xFF; v >>>= 8; buf[h+1] = v & 0xFF; buf[h+2] = v >>> 8; return bl + 16; } /* until ArrayBuffer#realloc is a thing, fake a realloc */ function realloc(b, sz/*:number*/) { var L = b.length, M = 2*L > sz ? 2*L : sz + 5, i = 0; if(L >= sz) return b; if(has_buf) { var o = new_unsafe_buf(M); // $FlowIgnore |
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