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bz2 - npm Package Compare versions

Comparing version 1.0.0 to 1.0.1

588

index.js

@@ -5,332 +5,340 @@ /*! bz2 (C) 2019-present SheetJS LLC */

(function bz2() {
// https://www.ncbi.nlm.nih.gov/IEB/ToolBox/CPP_DOC/lxr/source/src/util/compress/bzip2/crctable.c
const crc32Table = [
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
];
const crc32Table = [
0x00000000, 0x04c11db7, 0x09823b6e, 0x0d4326d9, 0x130476dc, 0x17c56b6b, 0x1a864db2, 0x1e475005,
0x2608edb8, 0x22c9f00f, 0x2f8ad6d6, 0x2b4bcb61, 0x350c9b64, 0x31cd86d3, 0x3c8ea00a, 0x384fbdbd,
0x4c11db70, 0x48d0c6c7, 0x4593e01e, 0x4152fda9, 0x5f15adac, 0x5bd4b01b, 0x569796c2, 0x52568b75,
0x6a1936c8, 0x6ed82b7f, 0x639b0da6, 0x675a1011, 0x791d4014, 0x7ddc5da3, 0x709f7b7a, 0x745e66cd,
0x9823b6e0, 0x9ce2ab57, 0x91a18d8e, 0x95609039, 0x8b27c03c, 0x8fe6dd8b, 0x82a5fb52, 0x8664e6e5,
0xbe2b5b58, 0xbaea46ef, 0xb7a96036, 0xb3687d81, 0xad2f2d84, 0xa9ee3033, 0xa4ad16ea, 0xa06c0b5d,
0xd4326d90, 0xd0f37027, 0xddb056fe, 0xd9714b49, 0xc7361b4c, 0xc3f706fb, 0xceb42022, 0xca753d95,
0xf23a8028, 0xf6fb9d9f, 0xfbb8bb46, 0xff79a6f1, 0xe13ef6f4, 0xe5ffeb43, 0xe8bccd9a, 0xec7dd02d,
0x34867077, 0x30476dc0, 0x3d044b19, 0x39c556ae, 0x278206ab, 0x23431b1c, 0x2e003dc5, 0x2ac12072,
0x128e9dcf, 0x164f8078, 0x1b0ca6a1, 0x1fcdbb16, 0x018aeb13, 0x054bf6a4, 0x0808d07d, 0x0cc9cdca,
0x7897ab07, 0x7c56b6b0, 0x71159069, 0x75d48dde, 0x6b93dddb, 0x6f52c06c, 0x6211e6b5, 0x66d0fb02,
0x5e9f46bf, 0x5a5e5b08, 0x571d7dd1, 0x53dc6066, 0x4d9b3063, 0x495a2dd4, 0x44190b0d, 0x40d816ba,
0xaca5c697, 0xa864db20, 0xa527fdf9, 0xa1e6e04e, 0xbfa1b04b, 0xbb60adfc, 0xb6238b25, 0xb2e29692,
0x8aad2b2f, 0x8e6c3698, 0x832f1041, 0x87ee0df6, 0x99a95df3, 0x9d684044, 0x902b669d, 0x94ea7b2a,
0xe0b41de7, 0xe4750050, 0xe9362689, 0xedf73b3e, 0xf3b06b3b, 0xf771768c, 0xfa325055, 0xfef34de2,
0xc6bcf05f, 0xc27dede8, 0xcf3ecb31, 0xcbffd686, 0xd5b88683, 0xd1799b34, 0xdc3abded, 0xd8fba05a,
0x690ce0ee, 0x6dcdfd59, 0x608edb80, 0x644fc637, 0x7a089632, 0x7ec98b85, 0x738aad5c, 0x774bb0eb,
0x4f040d56, 0x4bc510e1, 0x46863638, 0x42472b8f, 0x5c007b8a, 0x58c1663d, 0x558240e4, 0x51435d53,
0x251d3b9e, 0x21dc2629, 0x2c9f00f0, 0x285e1d47, 0x36194d42, 0x32d850f5, 0x3f9b762c, 0x3b5a6b9b,
0x0315d626, 0x07d4cb91, 0x0a97ed48, 0x0e56f0ff, 0x1011a0fa, 0x14d0bd4d, 0x19939b94, 0x1d528623,
0xf12f560e, 0xf5ee4bb9, 0xf8ad6d60, 0xfc6c70d7, 0xe22b20d2, 0xe6ea3d65, 0xeba91bbc, 0xef68060b,
0xd727bbb6, 0xd3e6a601, 0xdea580d8, 0xda649d6f, 0xc423cd6a, 0xc0e2d0dd, 0xcda1f604, 0xc960ebb3,
0xbd3e8d7e, 0xb9ff90c9, 0xb4bcb610, 0xb07daba7, 0xae3afba2, 0xaafbe615, 0xa7b8c0cc, 0xa379dd7b,
0x9b3660c6, 0x9ff77d71, 0x92b45ba8, 0x9675461f, 0x8832161a, 0x8cf30bad, 0x81b02d74, 0x857130c3,
0x5d8a9099, 0x594b8d2e, 0x5408abf7, 0x50c9b640, 0x4e8ee645, 0x4a4ffbf2, 0x470cdd2b, 0x43cdc09c,
0x7b827d21, 0x7f436096, 0x7200464f, 0x76c15bf8, 0x68860bfd, 0x6c47164a, 0x61043093, 0x65c52d24,
0x119b4be9, 0x155a565e, 0x18197087, 0x1cd86d30, 0x029f3d35, 0x065e2082, 0x0b1d065b, 0x0fdc1bec,
0x3793a651, 0x3352bbe6, 0x3e119d3f, 0x3ad08088, 0x2497d08d, 0x2056cd3a, 0x2d15ebe3, 0x29d4f654,
0xc5a92679, 0xc1683bce, 0xcc2b1d17, 0xc8ea00a0, 0xd6ad50a5, 0xd26c4d12, 0xdf2f6bcb, 0xdbee767c,
0xe3a1cbc1, 0xe760d676, 0xea23f0af, 0xeee2ed18, 0xf0a5bd1d, 0xf464a0aa, 0xf9278673, 0xfde69bc4,
0x89b8fd09, 0x8d79e0be, 0x803ac667, 0x84fbdbd0, 0x9abc8bd5, 0x9e7d9662, 0x933eb0bb, 0x97ffad0c,
0xafb010b1, 0xab710d06, 0xa6322bdf, 0xa2f33668, 0xbcb4666d, 0xb8757bda, 0xb5365d03, 0xb1f740b4,
];
// generated from 1 << i, except for 32
const masks = [
0x00000000, 0x00000001, 0x00000003, 0x00000007,
0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
0x0fffffff, 0x1fffffff, 0x3fffffff, -0x80000000,
];
// generated from 1 << i, except for 32
const masks = [
0x00000000, 0x00000001, 0x00000003, 0x00000007,
0x0000000f, 0x0000001f, 0x0000003f, 0x0000007f,
0x000000ff, 0x000001ff, 0x000003ff, 0x000007ff,
0x00000fff, 0x00001fff, 0x00003fff, 0x00007fff,
0x0000ffff, 0x0001ffff, 0x0003ffff, 0x0007ffff,
0x000fffff, 0x001fffff, 0x003fffff, 0x007fffff,
0x00ffffff, 0x01ffffff, 0x03ffffff, 0x07ffffff,
0x0fffffff, 0x1fffffff, 0x3fffffff, -0x80000000,
];
function createOrderedHuffmanTable(lengths) {
const z = [];
for (let i = 0; i < lengths.length; i += 1) {
z.push([i, lengths[i]]);
}
z.push([lengths.length, -1]);
const table = [];
let start = z[0][0];
let bits = z[0][1];
for (let i = 0; i < z.length; i += 1) {
const finish = z[i][0];
const endbits = z[i][1];
if (bits) {
for (let code = start; code < finish; code += 1) {
table.push({ code, bits, symbol: undefined });
function createOrderedHuffmanTable(lengths) {
const z = [];
for (let i = 0; i < lengths.length; i += 1) {
z.push([i, lengths[i]]);
}
z.push([lengths.length, -1]);
const table = [];
let start = z[0][0];
let bits = z[0][1];
for (let i = 0; i < z.length; i += 1) {
const finish = z[i][0];
const endbits = z[i][1];
if (bits) {
for (let code = start; code < finish; code += 1) {
table.push({ code, bits, symbol: undefined });
}
}
start = finish;
bits = endbits;
if (endbits === -1) {
break;
}
}
start = finish;
bits = endbits;
if (endbits === -1) {
break;
table.sort((a, b) => ((a.bits - b.bits) || (a.code - b.code)));
let tempBits = 0;
let symbol = -1;
const fastAccess = [];
let current;
for (let i = 0; i < table.length; i += 1) {
const t = table[i];
symbol += 1;
if (t.bits !== tempBits) {
symbol <<= t.bits - tempBits;
tempBits = t.bits;
current = fastAccess[tempBits] = {};
}
t.symbol = symbol;
current[symbol] = t;
}
return {
table,
fastAccess,
};
}
table.sort((a, b) => ((a.bits - b.bits) || (a.code - b.code)));
let tempBits = 0;
let symbol = -1;
const fastAccess = [];
let current;
for (let i = 0; i < table.length; i += 1) {
const t = table[i];
symbol += 1;
if (t.bits !== tempBits) {
symbol <<= t.bits - tempBits;
tempBits = t.bits;
current = fastAccess[tempBits] = {};
}
t.symbol = symbol;
current[symbol] = t;
}
return {
table,
fastAccess,
};
}
function bwtReverse(src, primary) {
if (primary < 0 || primary >= src.length) {
throw RangeError('Out of bound');
}
const unsorted = src.slice();
src.sort((a, b) => a - b);
const start = {};
for (let i = src.length - 1; i >= 0; i -= 1) {
start[src[i]] = i;
}
const links = [];
for (let i = 0; i < src.length; i += 1) {
links.push(start[unsorted[i]]++); // eslint-disable-line no-plusplus
}
let i;
const first = src[i = primary];
const ret = [];
for (let j = 1; j < src.length; j += 1) {
const x = src[i = links[i]];
if (x === undefined) {
ret.push(255);
} else {
ret.push(x);
function bwtReverse(src, primary) {
if (primary < 0 || primary >= src.length) {
throw RangeError('Out of bound');
}
const unsorted = src.slice();
src.sort((a, b) => a - b);
const start = {};
for (let i = src.length - 1; i >= 0; i -= 1) {
start[src[i]] = i;
}
const links = [];
for (let i = 0; i < src.length; i += 1) {
links.push(start[unsorted[i]]++); // eslint-disable-line no-plusplus
}
let i;
const first = src[i = primary];
const ret = [];
for (let j = 1; j < src.length; j += 1) {
const x = src[i = links[i]];
if (x === undefined) {
ret.push(255);
} else {
ret.push(x);
}
}
ret.push(first);
ret.reverse();
return ret;
}
ret.push(first);
ret.reverse();
return ret;
}
function decompress(bytes, checkCRC = false) {
let index = 0;
let bitfield = 0;
let bits = 0;
const read = (n) => {
if (n >= 32) {
const nd = n >> 1;
return read(nd) * (1 << nd) + read(n - nd);
function decompress(bytes, checkCRC = false) {
let index = 0;
let bitfield = 0;
let bits = 0;
const read = (n) => {
if (n >= 32) {
const nd = n >> 1;
return read(nd) * (1 << nd) + read(n - nd);
}
while (bits < n) {
bitfield = (bitfield << 8) + bytes[index];
index += 1;
bits += 8;
}
const m = masks[n];
const r = (bitfield >> (bits - n)) & m;
bits -= n;
bitfield &= ~(m << bits);
return r;
};
const magic = read(16);
if (magic !== 0x425A) { // 'BZ'
throw new Error('Invalid magic');
}
while (bits < n) {
bitfield = (bitfield << 8) + bytes[index];
index += 1;
bits += 8;
const method = read(8);
if (method !== 0x68) { // h for huffman
throw new Error('Invalid method');
}
const m = masks[n];
const r = (bitfield >> (bits - n)) & m;
bits -= n;
bitfield &= ~(m << bits);
return r;
};
const magic = read(16);
if (magic !== 0x425A) { // 'BZ'
throw new Error('Invalid magic');
}
const method = read(8);
if (method !== 0x68) { // h for huffman
throw new Error('Invalid method');
}
let blocksize = read(8);
if (blocksize >= 49 && blocksize <= 57) { // 1..9
blocksize -= 48;
} else {
throw new Error('Invalid blocksize');
}
let blocksize = read(8);
if (blocksize >= 49 && blocksize <= 57) { // 1..9
blocksize -= 48;
} else {
throw new Error('Invalid blocksize');
}
let out = new Uint8Array(bytes.length * 1.5);
let outIndex = 0;
let newCRC = -1;
while (true) {
const blocktype = read(48);
const crc = read(32) | 0;
if (blocktype === 0x314159265359) {
if (read(1)) {
throw new Error('do not support randomised');
}
const pointer = read(24);
const used = [];
const usedGroups = read(16);
for (let i = 1 << 15; i > 0; i >>= 1) {
if (!(usedGroups & i)) {
for (let j = 0; j < 16; j += 1) {
used.push(false);
let out = new Uint8Array(bytes.length * 1.5);
let outIndex = 0;
let newCRC = -1;
while (true) {
const blocktype = read(48);
const crc = read(32) | 0;
if (blocktype === 0x314159265359) {
if (read(1)) {
throw new Error('do not support randomised');
}
const pointer = read(24);
const used = [];
const usedGroups = read(16);
for (let i = 1 << 15; i > 0; i >>= 1) {
if (!(usedGroups & i)) {
for (let j = 0; j < 16; j += 1) {
used.push(false);
}
continue; // eslint-disable-line no-continue
}
continue; // eslint-disable-line no-continue
const usedChars = read(16);
for (let j = 1 << 15; j > 0; j >>= 1) {
used.push(!!(usedChars & j));
}
}
const usedChars = read(16);
for (let j = 1 << 15; j > 0; j >>= 1) {
used.push(!!(usedChars & j));
const groups = read(3);
if (groups < 2 || groups > 6) {
throw new Error('Invalid number of huffman groups');
}
}
const groups = read(3);
if (groups < 2 || groups > 6) {
throw new Error('Invalid number of huffman groups');
}
const selectorsUsed = read(15);
const selectors = [];
const mtf = Array.from({ length: groups }, (_, i) => i);
for (let i = 0; i < selectorsUsed; i += 1) {
let c = 0;
while (read(1)) {
c += 1;
if (c >= groups) {
throw new Error('MTF table out of range');
const selectorsUsed = read(15);
const selectors = [];
const mtf = Array.from({ length: groups }, (_, i) => i);
for (let i = 0; i < selectorsUsed; i += 1) {
let c = 0;
while (read(1)) {
c += 1;
if (c >= groups) {
throw new Error('MTF table out of range');
}
}
}
const v = mtf[c];
for (let j = c; j > 0; mtf[j] = mtf[--j]) { // eslint-disable-line no-plusplus
const v = mtf[c];
for (let j = c; j > 0; mtf[j] = mtf[--j]) { // eslint-disable-line no-plusplus
// nothing
}
selectors.push(v);
mtf[0] = v;
}
selectors.push(v);
mtf[0] = v;
}
const symbolsInUse = used.reduce((a, b) => a + b, 0) + 2;
const tables = [];
for (let i = 0; i < groups; i += 1) {
let length = read(5);
const lengths = [];
for (let j = 0; j < symbolsInUse; j += 1) {
if (length < 0 || length > 20) {
throw new Error('Huffman group length outside range');
const symbolsInUse = used.reduce((a, b) => a + b, 0) + 2;
const tables = [];
for (let i = 0; i < groups; i += 1) {
let length = read(5);
const lengths = [];
for (let j = 0; j < symbolsInUse; j += 1) {
if (length < 0 || length > 20) {
throw new Error('Huffman group length outside range');
}
while (read(1)) {
length -= (read(1) * 2) - 1;
}
lengths.push(length);
}
while (read(1)) {
length -= (read(1) * 2) - 1;
tables.push(createOrderedHuffmanTable(lengths));
}
const favourites = [];
for (let i = 0; i < used.length - 1; i += 1) {
if (used[i]) {
favourites.push(i);
}
lengths.push(length);
}
tables.push(createOrderedHuffmanTable(lengths));
}
const favourites = [];
for (let i = 0; i < used.length - 1; i += 1) {
if (used[i]) {
favourites.push(i);
}
}
let decoded = 0;
let selectorPointer = 0;
let t;
let r;
let repeat = 0;
let repeatPower = 0;
const buffer = [];
while (true) {
decoded -= 1;
if (decoded <= 0) {
decoded = 50;
if (selectorPointer <= selectors.length) {
t = tables[selectors[selectorPointer]];
selectorPointer += 1;
let decoded = 0;
let selectorPointer = 0;
let t;
let r;
let repeat = 0;
let repeatPower = 0;
const buffer = [];
while (true) {
decoded -= 1;
if (decoded <= 0) {
decoded = 50;
if (selectorPointer <= selectors.length) {
t = tables[selectors[selectorPointer]];
selectorPointer += 1;
}
}
}
for (const b in t.fastAccess) {
if (!Object.prototype.hasOwnProperty.call(t.fastAccess, b)) {
for (const b in t.fastAccess) {
if (!Object.prototype.hasOwnProperty.call(t.fastAccess, b)) {
continue; // eslint-disable-line no-continue
}
if (bits < b) {
bitfield = (bitfield << 8) + bytes[index];
index += 1;
bits += 8;
}
r = t.fastAccess[b][bitfield >> (bits - b)];
if (r) {
bitfield &= masks[bits -= b];
r = r.code;
break;
}
}
if (r >= 0 && r <= 1) {
if (repeat === 0) {
repeatPower = 1;
}
repeat += repeatPower << r;
repeatPower <<= 1;
continue; // eslint-disable-line no-continue
} else {
const v = favourites[0];
for (; repeat > 0; repeat -= 1) {
buffer.push(v);
}
}
if (bits < b) {
bitfield = (bitfield << 8) + bytes[index];
index += 1;
bits += 8;
}
r = t.fastAccess[b][bitfield >> (bits - b)];
if (r) {
bitfield &= masks[bits -= b];
r = r.code;
if (r === symbolsInUse - 1) {
break;
}
}
if (r >= 0 && r <= 1) {
if (repeat === 0) {
repeatPower = 1;
}
repeat += repeatPower << r;
repeatPower <<= 1;
continue; // eslint-disable-line no-continue
} else {
const v = favourites[0];
for (; repeat > 0; repeat -= 1) {
} else {
const v = favourites[r - 1];
// eslint-disable-next-line no-plusplus
for (let j = r - 1; j > 0; favourites[j] = favourites[--j]) {
// nothing
}
favourites[0] = v;
buffer.push(v);
}
}
if (r === symbolsInUse - 1) {
break;
} else {
const v = favourites[r - 1];
// eslint-disable-next-line no-plusplus
for (let j = r - 1; j > 0; favourites[j] = favourites[--j]) {
// nothing
}
favourites[0] = v;
buffer.push(v);
}
}
const nt = bwtReverse(buffer, pointer);
let i = 0;
while (i < nt.length) {
const c = nt[i];
let count = 1;
if ((i < nt.length - 4)
const nt = bwtReverse(buffer, pointer);
let i = 0;
while (i < nt.length) {
const c = nt[i];
let count = 1;
if ((i < nt.length - 4)
&& nt[i + 1] === c
&& nt[i + 2] === c
&& nt[i + 3] === c) {
count = nt[i + 4] + 4;
i += 5;
} else {
i += 1;
count = nt[i + 4] + 4;
i += 5;
} else {
i += 1;
}
if (outIndex + count >= out.length) {
const old = out;
out = new Uint8Array(old.length * 2);
out.set(old);
}
for (let j = 0; j < count; j += 1) {
if (checkCRC) {
newCRC = (newCRC << 8) ^ crc32Table[((newCRC >> 24) ^ c) & 0xff];
}
out[outIndex] = c;
outIndex += 1;
}
}
if (outIndex + count >= out.length) {
const old = out;
out = new Uint8Array(old.length * 2);
out.set(old);
}
for (let j = 0; j < count; j += 1) {
if (checkCRC) {
newCRC = (newCRC << 8) ^ crc32Table[((newCRC >> 24) ^ c) & 0xff];
if (checkCRC) {
const calculatedCRC = newCRC ^ -1;
if (calculatedCRC !== crc) {
throw new Error(`CRC mismatch: ${calculatedCRC} !== ${crc}`);
}
out[outIndex] = c;
outIndex += 1;
newCRC = -1;
}
} else if (blocktype === 0x177245385090) {
read(bits & 0x07); // pad align
break;
} else {
throw new Error('Invalid bz2 blocktype');
}
if (checkCRC) {
const calculatedCRC = newCRC ^ -1;
if (calculatedCRC !== crc) {
throw new Error(`CRC mismatch: ${calculatedCRC} !== ${crc}`);
}
newCRC = -1;
}
} else if (blocktype === 0x177245385090) {
read(bits & 0x07); // pad align
break;
} else {
throw new Error('Invalid bz2 blocktype');
}
return out.subarray(0, outIndex);
}
return out.subarray(0, outIndex);
}
module.exports = { decompress };
const exports = { decompress };
if (typeof window !== 'undefined') {
window.bz2 = exports; // eslint-disable-line no-undef
} else {
module.exports = exports;
}
}());

2

package.json
{
"name": "bz2",
"version": "1.0.0",
"version": "1.0.1",
"description": "bzip2 for JavaScript",

@@ -5,0 +5,0 @@ "main": "index.js",

index.html

Sorry, the diff of this file is not supported yet

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