node-nlp
Version:
Library for NLU (Natural Language Understanding) done in Node.js
1,473 lines • 8.22 MB
JavaScript
(function() {
function r(e, n, t) {
function o(i, f) {
if (!n[i]) {
if (!e[i]) {
var c = "function" == typeof require && require;
if (!f && c) return c(i, !0);
if (u) return u(i, !0);
var a = new Error("Cannot find module '" + i + "'");
throw ((a.code = "MODULE_NOT_FOUND"), a);
}
var p = (n[i] = { exports: {} });
e[i][0].call(
p.exports,
function(r) {
var n = e[i][1][r];
return o(n || r);
},
p,
p.exports,
r,
e,
n,
t
);
}
return n[i].exports;
}
for (
var u = "function" == typeof require && require, i = 0;
i < t.length;
i++
)
o(t[i]);
return o;
}
return r;
})()(
{
1: [function(require, module, exports) {}, {}],
2: [
function(require, module, exports) {
"use strict";
exports.byteLength = byteLength;
exports.toByteArray = toByteArray;
exports.fromByteArray = fromByteArray;
var lookup = [];
var revLookup = [];
var Arr = typeof Uint8Array !== "undefined" ? Uint8Array : Array;
var code =
"ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
for (var i = 0, len = code.length; i < len; ++i) {
lookup[i] = code[i];
revLookup[code.charCodeAt(i)] = i;
}
revLookup["-".charCodeAt(0)] = 62;
revLookup["_".charCodeAt(0)] = 63;
function getLens(b64) {
var len = b64.length;
if (len % 4 > 0) {
throw new Error("Invalid string. Length must be a multiple of 4");
}
var validLen = b64.indexOf("=");
if (validLen === -1) validLen = len;
var placeHoldersLen = validLen === len ? 0 : 4 - (validLen % 4);
return [validLen, placeHoldersLen];
}
function byteLength(b64) {
var lens = getLens(b64);
var validLen = lens[0];
var placeHoldersLen = lens[1];
return ((validLen + placeHoldersLen) * 3) / 4 - placeHoldersLen;
}
function _byteLength(b64, validLen, placeHoldersLen) {
return ((validLen + placeHoldersLen) * 3) / 4 - placeHoldersLen;
}
function toByteArray(b64) {
var tmp;
var lens = getLens(b64);
var validLen = lens[0];
var placeHoldersLen = lens[1];
var arr = new Arr(_byteLength(b64, validLen, placeHoldersLen));
var curByte = 0;
var len = placeHoldersLen > 0 ? validLen - 4 : validLen;
for (var i = 0; i < len; i += 4) {
tmp =
(revLookup[b64.charCodeAt(i)] << 18) |
(revLookup[b64.charCodeAt(i + 1)] << 12) |
(revLookup[b64.charCodeAt(i + 2)] << 6) |
revLookup[b64.charCodeAt(i + 3)];
arr[curByte++] = (tmp >> 16) & 255;
arr[curByte++] = (tmp >> 8) & 255;
arr[curByte++] = tmp & 255;
}
if (placeHoldersLen === 2) {
tmp =
(revLookup[b64.charCodeAt(i)] << 2) |
(revLookup[b64.charCodeAt(i + 1)] >> 4);
arr[curByte++] = tmp & 255;
}
if (placeHoldersLen === 1) {
tmp =
(revLookup[b64.charCodeAt(i)] << 10) |
(revLookup[b64.charCodeAt(i + 1)] << 4) |
(revLookup[b64.charCodeAt(i + 2)] >> 2);
arr[curByte++] = (tmp >> 8) & 255;
arr[curByte++] = tmp & 255;
}
return arr;
}
function tripletToBase64(num) {
return (
lookup[(num >> 18) & 63] +
lookup[(num >> 12) & 63] +
lookup[(num >> 6) & 63] +
lookup[num & 63]
);
}
function encodeChunk(uint8, start, end) {
var tmp;
var output = [];
for (var i = start; i < end; i += 3) {
tmp =
((uint8[i] << 16) & 16711680) +
((uint8[i + 1] << 8) & 65280) +
(uint8[i + 2] & 255);
output.push(tripletToBase64(tmp));
}
return output.join("");
}
function fromByteArray(uint8) {
var tmp;
var len = uint8.length;
var extraBytes = len % 3;
var parts = [];
var maxChunkLength = 16383;
for (
var i = 0, len2 = len - extraBytes;
i < len2;
i += maxChunkLength
) {
parts.push(
encodeChunk(
uint8,
i,
i + maxChunkLength > len2 ? len2 : i + maxChunkLength
)
);
}
if (extraBytes === 1) {
tmp = uint8[len - 1];
parts.push(lookup[tmp >> 2] + lookup[(tmp << 4) & 63] + "==");
} else if (extraBytes === 2) {
tmp = (uint8[len - 2] << 8) + uint8[len - 1];
parts.push(
lookup[tmp >> 10] +
lookup[(tmp >> 4) & 63] +
lookup[(tmp << 2) & 63] +
"="
);
}
return parts.join("");
}
},
{}
],
3: [
function(require, module, exports) {
arguments[4][1][0].apply(exports, arguments);
},
{ dup: 1 }
],
4: [
function(require, module, exports) {
"use strict";
var base64 = require("base64-js");
var ieee754 = require("ieee754");
exports.Buffer = Buffer;
exports.SlowBuffer = SlowBuffer;
exports.INSPECT_MAX_BYTES = 50;
var K_MAX_LENGTH = 2147483647;
exports.kMaxLength = K_MAX_LENGTH;
Buffer.TYPED_ARRAY_SUPPORT = typedArraySupport();
if (
!Buffer.TYPED_ARRAY_SUPPORT &&
typeof console !== "undefined" &&
typeof console.error === "function"
) {
console.error(
"This browser lacks typed array (Uint8Array) support which is required by " +
"`buffer` v5.x. Use `buffer` v4.x if you require old browser support."
);
}
function typedArraySupport() {
try {
var arr = new Uint8Array(1);
arr.__proto__ = {
__proto__: Uint8Array.prototype,
foo: function() {
return 42;
}
};
return arr.foo() === 42;
} catch (e) {
return false;
}
}
Object.defineProperty(Buffer.prototype, "parent", {
enumerable: true,
get: function() {
if (!Buffer.isBuffer(this)) return undefined;
return this.buffer;
}
});
Object.defineProperty(Buffer.prototype, "offset", {
enumerable: true,
get: function() {
if (!Buffer.isBuffer(this)) return undefined;
return this.byteOffset;
}
});
function createBuffer(length) {
if (length > K_MAX_LENGTH) {
throw new RangeError(
'The value "' + length + '" is invalid for option "size"'
);
}
var buf = new Uint8Array(length);
buf.__proto__ = Buffer.prototype;
return buf;
}
function Buffer(arg, encodingOrOffset, length) {
if (typeof arg === "number") {
if (typeof encodingOrOffset === "string") {
throw new TypeError(
'The "string" argument must be of type string. Received type number'
);
}
return allocUnsafe(arg);
}
return from(arg, encodingOrOffset, length);
}
if (
typeof Symbol !== "undefined" &&
Symbol.species != null &&
Buffer[Symbol.species] === Buffer
) {
Object.defineProperty(Buffer, Symbol.species, {
value: null,
configurable: true,
enumerable: false,
writable: false
});
}
Buffer.poolSize = 8192;
function from(value, encodingOrOffset, length) {
if (typeof value === "string") {
return fromString(value, encodingOrOffset);
}
if (ArrayBuffer.isView(value)) {
return fromArrayLike(value);
}
if (value == null) {
throw TypeError(
"The first argument must be one of type string, Buffer, ArrayBuffer, Array, " +
"or Array-like Object. Received type " +
typeof value
);
}
if (
isInstance(value, ArrayBuffer) ||
(value && isInstance(value.buffer, ArrayBuffer))
) {
return fromArrayBuffer(value, encodingOrOffset, length);
}
if (typeof value === "number") {
throw new TypeError(
'The "value" argument must not be of type number. Received type number'
);
}
var valueOf = value.valueOf && value.valueOf();
if (valueOf != null && valueOf !== value) {
return Buffer.from(valueOf, encodingOrOffset, length);
}
var b = fromObject(value);
if (b) return b;
if (
typeof Symbol !== "undefined" &&
Symbol.toPrimitive != null &&
typeof value[Symbol.toPrimitive] === "function"
) {
return Buffer.from(
value[Symbol.toPrimitive]("string"),
encodingOrOffset,
length
);
}
throw new TypeError(
"The first argument must be one of type string, Buffer, ArrayBuffer, Array, " +
"or Array-like Object. Received type " +
typeof value
);
}
Buffer.from = function(value, encodingOrOffset, length) {
return from(value, encodingOrOffset, length);
};
Buffer.prototype.__proto__ = Uint8Array.prototype;
Buffer.__proto__ = Uint8Array;
function assertSize(size) {
if (typeof size !== "number") {
throw new TypeError('"size" argument must be of type number');
} else if (size < 0) {
throw new RangeError(
'The value "' + size + '" is invalid for option "size"'
);
}
}
function alloc(size, fill, encoding) {
assertSize(size);
if (size <= 0) {
return createBuffer(size);
}
if (fill !== undefined) {
return typeof encoding === "string"
? createBuffer(size).fill(fill, encoding)
: createBuffer(size).fill(fill);
}
return createBuffer(size);
}
Buffer.alloc = function(size, fill, encoding) {
return alloc(size, fill, encoding);
};
function allocUnsafe(size) {
assertSize(size);
return createBuffer(size < 0 ? 0 : checked(size) | 0);
}
Buffer.allocUnsafe = function(size) {
return allocUnsafe(size);
};
Buffer.allocUnsafeSlow = function(size) {
return allocUnsafe(size);
};
function fromString(string, encoding) {
if (typeof encoding !== "string" || encoding === "") {
encoding = "utf8";
}
if (!Buffer.isEncoding(encoding)) {
throw new TypeError("Unknown encoding: " + encoding);
}
var length = byteLength(string, encoding) | 0;
var buf = createBuffer(length);
var actual = buf.write(string, encoding);
if (actual !== length) {
buf = buf.slice(0, actual);
}
return buf;
}
function fromArrayLike(array) {
var length = array.length < 0 ? 0 : checked(array.length) | 0;
var buf = createBuffer(length);
for (var i = 0; i < length; i += 1) {
buf[i] = array[i] & 255;
}
return buf;
}
function fromArrayBuffer(array, byteOffset, length) {
if (byteOffset < 0 || array.byteLength < byteOffset) {
throw new RangeError('"offset" is outside of buffer bounds');
}
if (array.byteLength < byteOffset + (length || 0)) {
throw new RangeError('"length" is outside of buffer bounds');
}
var buf;
if (byteOffset === undefined && length === undefined) {
buf = new Uint8Array(array);
} else if (length === undefined) {
buf = new Uint8Array(array, byteOffset);
} else {
buf = new Uint8Array(array, byteOffset, length);
}
buf.__proto__ = Buffer.prototype;
return buf;
}
function fromObject(obj) {
if (Buffer.isBuffer(obj)) {
var len = checked(obj.length) | 0;
var buf = createBuffer(len);
if (buf.length === 0) {
return buf;
}
obj.copy(buf, 0, 0, len);
return buf;
}
if (obj.length !== undefined) {
if (typeof obj.length !== "number" || numberIsNaN(obj.length)) {
return createBuffer(0);
}
return fromArrayLike(obj);
}
if (obj.type === "Buffer" && Array.isArray(obj.data)) {
return fromArrayLike(obj.data);
}
}
function checked(length) {
if (length >= K_MAX_LENGTH) {
throw new RangeError(
"Attempt to allocate Buffer larger than maximum " +
"size: 0x" +
K_MAX_LENGTH.toString(16) +
" bytes"
);
}
return length | 0;
}
function SlowBuffer(length) {
if (+length != length) {
length = 0;
}
return Buffer.alloc(+length);
}
Buffer.isBuffer = function isBuffer(b) {
return b != null && b._isBuffer === true && b !== Buffer.prototype;
};
Buffer.compare = function compare(a, b) {
if (isInstance(a, Uint8Array))
a = Buffer.from(a, a.offset, a.byteLength);
if (isInstance(b, Uint8Array))
b = Buffer.from(b, b.offset, b.byteLength);
if (!Buffer.isBuffer(a) || !Buffer.isBuffer(b)) {
throw new TypeError(
'The "buf1", "buf2" arguments must be one of type Buffer or Uint8Array'
);
}
if (a === b) return 0;
var x = a.length;
var y = b.length;
for (var i = 0, len = Math.min(x, y); i < len; ++i) {
if (a[i] !== b[i]) {
x = a[i];
y = b[i];
break;
}
}
if (x < y) return -1;
if (y < x) return 1;
return 0;
};
Buffer.isEncoding = function isEncoding(encoding) {
switch (String(encoding).toLowerCase()) {
case "hex":
case "utf8":
case "utf-8":
case "ascii":
case "latin1":
case "binary":
case "base64":
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return true;
default:
return false;
}
};
Buffer.concat = function concat(list, length) {
if (!Array.isArray(list)) {
throw new TypeError('"list" argument must be an Array of Buffers');
}
if (list.length === 0) {
return Buffer.alloc(0);
}
var i;
if (length === undefined) {
length = 0;
for (i = 0; i < list.length; ++i) {
length += list[i].length;
}
}
var buffer = Buffer.allocUnsafe(length);
var pos = 0;
for (i = 0; i < list.length; ++i) {
var buf = list[i];
if (isInstance(buf, Uint8Array)) {
buf = Buffer.from(buf);
}
if (!Buffer.isBuffer(buf)) {
throw new TypeError(
'"list" argument must be an Array of Buffers'
);
}
buf.copy(buffer, pos);
pos += buf.length;
}
return buffer;
};
function byteLength(string, encoding) {
if (Buffer.isBuffer(string)) {
return string.length;
}
if (ArrayBuffer.isView(string) || isInstance(string, ArrayBuffer)) {
return string.byteLength;
}
if (typeof string !== "string") {
throw new TypeError(
'The "string" argument must be one of type string, Buffer, or ArrayBuffer. ' +
"Received type " +
typeof string
);
}
var len = string.length;
var mustMatch = arguments.length > 2 && arguments[2] === true;
if (!mustMatch && len === 0) return 0;
var loweredCase = false;
for (;;) {
switch (encoding) {
case "ascii":
case "latin1":
case "binary":
return len;
case "utf8":
case "utf-8":
return utf8ToBytes(string).length;
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return len * 2;
case "hex":
return len >>> 1;
case "base64":
return base64ToBytes(string).length;
default:
if (loweredCase) {
return mustMatch ? -1 : utf8ToBytes(string).length;
}
encoding = ("" + encoding).toLowerCase();
loweredCase = true;
}
}
}
Buffer.byteLength = byteLength;
function slowToString(encoding, start, end) {
var loweredCase = false;
if (start === undefined || start < 0) {
start = 0;
}
if (start > this.length) {
return "";
}
if (end === undefined || end > this.length) {
end = this.length;
}
if (end <= 0) {
return "";
}
end >>>= 0;
start >>>= 0;
if (end <= start) {
return "";
}
if (!encoding) encoding = "utf8";
while (true) {
switch (encoding) {
case "hex":
return hexSlice(this, start, end);
case "utf8":
case "utf-8":
return utf8Slice(this, start, end);
case "ascii":
return asciiSlice(this, start, end);
case "latin1":
case "binary":
return latin1Slice(this, start, end);
case "base64":
return base64Slice(this, start, end);
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return utf16leSlice(this, start, end);
default:
if (loweredCase)
throw new TypeError("Unknown encoding: " + encoding);
encoding = (encoding + "").toLowerCase();
loweredCase = true;
}
}
}
Buffer.prototype._isBuffer = true;
function swap(b, n, m) {
var i = b[n];
b[n] = b[m];
b[m] = i;
}
Buffer.prototype.swap16 = function swap16() {
var len = this.length;
if (len % 2 !== 0) {
throw new RangeError("Buffer size must be a multiple of 16-bits");
}
for (var i = 0; i < len; i += 2) {
swap(this, i, i + 1);
}
return this;
};
Buffer.prototype.swap32 = function swap32() {
var len = this.length;
if (len % 4 !== 0) {
throw new RangeError("Buffer size must be a multiple of 32-bits");
}
for (var i = 0; i < len; i += 4) {
swap(this, i, i + 3);
swap(this, i + 1, i + 2);
}
return this;
};
Buffer.prototype.swap64 = function swap64() {
var len = this.length;
if (len % 8 !== 0) {
throw new RangeError("Buffer size must be a multiple of 64-bits");
}
for (var i = 0; i < len; i += 8) {
swap(this, i, i + 7);
swap(this, i + 1, i + 6);
swap(this, i + 2, i + 5);
swap(this, i + 3, i + 4);
}
return this;
};
Buffer.prototype.toString = function toString() {
var length = this.length;
if (length === 0) return "";
if (arguments.length === 0) return utf8Slice(this, 0, length);
return slowToString.apply(this, arguments);
};
Buffer.prototype.toLocaleString = Buffer.prototype.toString;
Buffer.prototype.equals = function equals(b) {
if (!Buffer.isBuffer(b))
throw new TypeError("Argument must be a Buffer");
if (this === b) return true;
return Buffer.compare(this, b) === 0;
};
Buffer.prototype.inspect = function inspect() {
var str = "";
var max = exports.INSPECT_MAX_BYTES;
str = this.toString("hex", 0, max)
.replace(/(.{2})/g, "$1 ")
.trim();
if (this.length > max) str += " ... ";
return "<Buffer " + str + ">";
};
Buffer.prototype.compare = function compare(
target,
start,
end,
thisStart,
thisEnd
) {
if (isInstance(target, Uint8Array)) {
target = Buffer.from(target, target.offset, target.byteLength);
}
if (!Buffer.isBuffer(target)) {
throw new TypeError(
'The "target" argument must be one of type Buffer or Uint8Array. ' +
"Received type " +
typeof target
);
}
if (start === undefined) {
start = 0;
}
if (end === undefined) {
end = target ? target.length : 0;
}
if (thisStart === undefined) {
thisStart = 0;
}
if (thisEnd === undefined) {
thisEnd = this.length;
}
if (
start < 0 ||
end > target.length ||
thisStart < 0 ||
thisEnd > this.length
) {
throw new RangeError("out of range index");
}
if (thisStart >= thisEnd && start >= end) {
return 0;
}
if (thisStart >= thisEnd) {
return -1;
}
if (start >= end) {
return 1;
}
start >>>= 0;
end >>>= 0;
thisStart >>>= 0;
thisEnd >>>= 0;
if (this === target) return 0;
var x = thisEnd - thisStart;
var y = end - start;
var len = Math.min(x, y);
var thisCopy = this.slice(thisStart, thisEnd);
var targetCopy = target.slice(start, end);
for (var i = 0; i < len; ++i) {
if (thisCopy[i] !== targetCopy[i]) {
x = thisCopy[i];
y = targetCopy[i];
break;
}
}
if (x < y) return -1;
if (y < x) return 1;
return 0;
};
function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
if (buffer.length === 0) return -1;
if (typeof byteOffset === "string") {
encoding = byteOffset;
byteOffset = 0;
} else if (byteOffset > 2147483647) {
byteOffset = 2147483647;
} else if (byteOffset < -2147483648) {
byteOffset = -2147483648;
}
byteOffset = +byteOffset;
if (numberIsNaN(byteOffset)) {
byteOffset = dir ? 0 : buffer.length - 1;
}
if (byteOffset < 0) byteOffset = buffer.length + byteOffset;
if (byteOffset >= buffer.length) {
if (dir) return -1;
else byteOffset = buffer.length - 1;
} else if (byteOffset < 0) {
if (dir) byteOffset = 0;
else return -1;
}
if (typeof val === "string") {
val = Buffer.from(val, encoding);
}
if (Buffer.isBuffer(val)) {
if (val.length === 0) {
return -1;
}
return arrayIndexOf(buffer, val, byteOffset, encoding, dir);
} else if (typeof val === "number") {
val = val & 255;
if (typeof Uint8Array.prototype.indexOf === "function") {
if (dir) {
return Uint8Array.prototype.indexOf.call(
buffer,
val,
byteOffset
);
} else {
return Uint8Array.prototype.lastIndexOf.call(
buffer,
val,
byteOffset
);
}
}
return arrayIndexOf(buffer, [val], byteOffset, encoding, dir);
}
throw new TypeError("val must be string, number or Buffer");
}
function arrayIndexOf(arr, val, byteOffset, encoding, dir) {
var indexSize = 1;
var arrLength = arr.length;
var valLength = val.length;
if (encoding !== undefined) {
encoding = String(encoding).toLowerCase();
if (
encoding === "ucs2" ||
encoding === "ucs-2" ||
encoding === "utf16le" ||
encoding === "utf-16le"
) {
if (arr.length < 2 || val.length < 2) {
return -1;
}
indexSize = 2;
arrLength /= 2;
valLength /= 2;
byteOffset /= 2;
}
}
function read(buf, i) {
if (indexSize === 1) {
return buf[i];
} else {
return buf.readUInt16BE(i * indexSize);
}
}
var i;
if (dir) {
var foundIndex = -1;
for (i = byteOffset; i < arrLength; i++) {
if (
read(arr, i) ===
read(val, foundIndex === -1 ? 0 : i - foundIndex)
) {
if (foundIndex === -1) foundIndex = i;
if (i - foundIndex + 1 === valLength)
return foundIndex * indexSize;
} else {
if (foundIndex !== -1) i -= i - foundIndex;
foundIndex = -1;
}
}
} else {
if (byteOffset + valLength > arrLength)
byteOffset = arrLength - valLength;
for (i = byteOffset; i >= 0; i--) {
var found = true;
for (var j = 0; j < valLength; j++) {
if (read(arr, i + j) !== read(val, j)) {
found = false;
break;
}
}
if (found) return i;
}
}
return -1;
}
Buffer.prototype.includes = function includes(
val,
byteOffset,
encoding
) {
return this.indexOf(val, byteOffset, encoding) !== -1;
};
Buffer.prototype.indexOf = function indexOf(val, byteOffset, encoding) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, true);
};
Buffer.prototype.lastIndexOf = function lastIndexOf(
val,
byteOffset,
encoding
) {
return bidirectionalIndexOf(this, val, byteOffset, encoding, false);
};
function hexWrite(buf, string, offset, length) {
offset = Number(offset) || 0;
var remaining = buf.length - offset;
if (!length) {
length = remaining;
} else {
length = Number(length);
if (length > remaining) {
length = remaining;
}
}
var strLen = string.length;
if (length > strLen / 2) {
length = strLen / 2;
}
for (var i = 0; i < length; ++i) {
var parsed = parseInt(string.substr(i * 2, 2), 16);
if (numberIsNaN(parsed)) return i;
buf[offset + i] = parsed;
}
return i;
}
function utf8Write(buf, string, offset, length) {
return blitBuffer(
utf8ToBytes(string, buf.length - offset),
buf,
offset,
length
);
}
function asciiWrite(buf, string, offset, length) {
return blitBuffer(asciiToBytes(string), buf, offset, length);
}
function latin1Write(buf, string, offset, length) {
return asciiWrite(buf, string, offset, length);
}
function base64Write(buf, string, offset, length) {
return blitBuffer(base64ToBytes(string), buf, offset, length);
}
function ucs2Write(buf, string, offset, length) {
return blitBuffer(
utf16leToBytes(string, buf.length - offset),
buf,
offset,
length
);
}
Buffer.prototype.write = function write(
string,
offset,
length,
encoding
) {
if (offset === undefined) {
encoding = "utf8";
length = this.length;
offset = 0;
} else if (length === undefined && typeof offset === "string") {
encoding = offset;
length = this.length;
offset = 0;
} else if (isFinite(offset)) {
offset = offset >>> 0;
if (isFinite(length)) {
length = length >>> 0;
if (encoding === undefined) encoding = "utf8";
} else {
encoding = length;
length = undefined;
}
} else {
throw new Error(
"Buffer.write(string, encoding, offset[, length]) is no longer supported"
);
}
var remaining = this.length - offset;
if (length === undefined || length > remaining) length = remaining;
if (
(string.length > 0 && (length < 0 || offset < 0)) ||
offset > this.length
) {
throw new RangeError("Attempt to write outside buffer bounds");
}
if (!encoding) encoding = "utf8";
var loweredCase = false;
for (;;) {
switch (encoding) {
case "hex":
return hexWrite(this, string, offset, length);
case "utf8":
case "utf-8":
return utf8Write(this, string, offset, length);
case "ascii":
return asciiWrite(this, string, offset, length);
case "latin1":
case "binary":
return latin1Write(this, string, offset, length);
case "base64":
return base64Write(this, string, offset, length);
case "ucs2":
case "ucs-2":
case "utf16le":
case "utf-16le":
return ucs2Write(this, string, offset, length);
default:
if (loweredCase)
throw new TypeError("Unknown encoding: " + encoding);
encoding = ("" + encoding).toLowerCase();
loweredCase = true;
}
}
};
Buffer.prototype.toJSON = function toJSON() {
return {
type: "Buffer",
data: Array.prototype.slice.call(this._arr || this, 0)
};
};
function base64Slice(buf, start, end) {
if (start === 0 && end === buf.length) {
return base64.fromByteArray(buf);
} else {
return base64.fromByteArray(buf.slice(start, end));
}
}
function utf8Slice(buf, start, end) {
end = Math.min(buf.length, end);
var res = [];
var i = start;
while (i < end) {
var firstByte = buf[i];
var codePoint = null;
var bytesPerSequence =
firstByte > 239
? 4
: firstByte > 223
? 3
: firstByte > 191
? 2
: 1;
if (i + bytesPerSequence <= end) {
var secondByte, thirdByte, fourthByte, tempCodePoint;
switch (bytesPerSequence) {
case 1:
if (firstByte < 128) {
codePoint = firstByte;
}
break;
case 2:
secondByte = buf[i + 1];
if ((secondByte & 192) === 128) {
tempCodePoint = ((firstByte & 31) << 6) | (secondByte & 63);
if (tempCodePoint > 127) {
codePoint = tempCodePoint;
}
}
break;
case 3:
secondByte = buf[i + 1];
thirdByte = buf[i + 2];
if ((secondByte & 192) === 128 && (thirdByte & 192) === 128) {
tempCodePoint =
((firstByte & 15) << 12) |
((secondByte & 63) << 6) |
(thirdByte & 63);
if (
tempCodePoint > 2047 &&
(tempCodePoint < 55296 || tempCodePoint > 57343)
) {
codePoint = tempCodePoint;
}
}
break;
case 4:
secondByte = buf[i + 1];
thirdByte = buf[i + 2];
fourthByte = buf[i + 3];
if (
(secondByte & 192) === 128 &&
(thirdByte & 192) === 128 &&
(fourthByte & 192) === 128
) {
tempCodePoint =
((firstByte & 15) << 18) |
((secondByte & 63) << 12) |
((thirdByte & 63) << 6) |
(fourthByte & 63);
if (tempCodePoint > 65535 && tempCodePoint < 1114112) {
codePoint = tempCodePoint;
}
}
}
}
if (codePoint === null) {
codePoint = 65533;
bytesPerSequence = 1;
} else if (codePoint > 65535) {
codePoint -= 65536;
res.push(((codePoint >>> 10) & 1023) | 55296);
codePoint = 56320 | (codePoint & 1023);
}
res.push(codePoint);
i += bytesPerSequence;
}
return decodeCodePointsArray(res);
}
var MAX_ARGUMENTS_LENGTH = 4096;
function decodeCodePointsArray(codePoints) {
var len = codePoints.length;
if (len <= MAX_ARGUMENTS_LENGTH) {
return String.fromCharCode.apply(String, codePoints);
}
var res = "";
var i = 0;
while (i < len) {
res += String.fromCharCode.apply(
String,
codePoints.slice(i, (i += MAX_ARGUMENTS_LENGTH))
);
}
return res;
}
function asciiSlice(buf, start, end) {
var ret = "";
end = Math.min(buf.length, end);
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i] & 127);
}
return ret;
}
function latin1Slice(buf, start, end) {
var ret = "";
end = Math.min(buf.length, end);
for (var i = start; i < end; ++i) {
ret += String.fromCharCode(buf[i]);
}
return ret;
}
function hexSlice(buf, start, end) {
var len = buf.length;
if (!start || start < 0) start = 0;
if (!end || end < 0 || end > len) end = len;
var out = "";
for (var i = start; i < end; ++i) {
out += toHex(buf[i]);
}
return out;
}
function utf16leSlice(buf, start, end) {
var bytes = buf.slice(start, end);
var res = "";
for (var i = 0; i < bytes.length; i += 2) {
res += String.fromCharCode(bytes[i] + bytes[i + 1] * 256);
}
return res;
}
Buffer.prototype.slice = function slice(start, end) {
var len = this.length;
start = ~~start;
end = end === undefined ? len : ~~end;
if (start < 0) {
start += len;
if (start < 0) start = 0;
} else if (start > len) {
start = len;
}
if (end < 0) {
end += len;
if (end < 0) end = 0;
} else if (end > len) {
end = len;
}
if (end < start) end = start;
var newBuf = this.subarray(start, end);
newBuf.__proto__ = Buffer.prototype;
return newBuf;
};
function checkOffset(offset, ext, length) {
if (offset % 1 !== 0 || offset < 0)
throw new RangeError("offset is not uint");
if (offset + ext > length)
throw new RangeError("Trying to access beyond buffer length");
}
Buffer.prototype.readUIntLE = function readUIntLE(
offset,
byteLength,
noAssert
) {
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var val = this[offset];
var mul = 1;
var i = 0;
while (++i < byteLength && (mul *= 256)) {
val += this[offset + i] * mul;
}
return val;
};
Buffer.prototype.readUIntBE = function readUIntBE(
offset,
byteLength,
noAssert
) {
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) {
checkOffset(offset, byteLength, this.length);
}
var val = this[offset + --byteLength];
var mul = 1;
while (byteLength > 0 && (mul *= 256)) {
val += this[offset + --byteLength] * mul;
}
return val;
};
Buffer.prototype.readUInt8 = function readUInt8(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 1, this.length);
return this[offset];
};
Buffer.prototype.readUInt16LE = function readUInt16LE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 2, this.length);
return this[offset] | (this[offset + 1] << 8);
};
Buffer.prototype.readUInt16BE = function readUInt16BE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 2, this.length);
return (this[offset] << 8) | this[offset + 1];
};
Buffer.prototype.readUInt32LE = function readUInt32LE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return (
(this[offset] |
(this[offset + 1] << 8) |
(this[offset + 2] << 16)) +
this[offset + 3] * 16777216
);
};
Buffer.prototype.readUInt32BE = function readUInt32BE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return (
this[offset] * 16777216 +
((this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3])
);
};
Buffer.prototype.readIntLE = function readIntLE(
offset,
byteLength,
noAssert
) {
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var val = this[offset];
var mul = 1;
var i = 0;
while (++i < byteLength && (mul *= 256)) {
val += this[offset + i] * mul;
}
mul *= 128;
if (val >= mul) val -= Math.pow(2, 8 * byteLength);
return val;
};
Buffer.prototype.readIntBE = function readIntBE(
offset,
byteLength,
noAssert
) {
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) checkOffset(offset, byteLength, this.length);
var i = byteLength;
var mul = 1;
var val = this[offset + --i];
while (i > 0 && (mul *= 256)) {
val += this[offset + --i] * mul;
}
mul *= 128;
if (val >= mul) val -= Math.pow(2, 8 * byteLength);
return val;
};
Buffer.prototype.readInt8 = function readInt8(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 1, this.length);
if (!(this[offset] & 128)) return this[offset];
return (255 - this[offset] + 1) * -1;
};
Buffer.prototype.readInt16LE = function readInt16LE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 2, this.length);
var val = this[offset] | (this[offset + 1] << 8);
return val & 32768 ? val | 4294901760 : val;
};
Buffer.prototype.readInt16BE = function readInt16BE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 2, this.length);
var val = this[offset + 1] | (this[offset] << 8);
return val & 32768 ? val | 4294901760 : val;
};
Buffer.prototype.readInt32LE = function readInt32LE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return (
this[offset] |
(this[offset + 1] << 8) |
(this[offset + 2] << 16) |
(this[offset + 3] << 24)
);
};
Buffer.prototype.readInt32BE = function readInt32BE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return (
(this[offset] << 24) |
(this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3]
);
};
Buffer.prototype.readFloatLE = function readFloatLE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return ieee754.read(this, offset, true, 23, 4);
};
Buffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 4, this.length);
return ieee754.read(this, offset, false, 23, 4);
};
Buffer.prototype.readDoubleLE = function readDoubleLE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 8, this.length);
return ieee754.read(this, offset, true, 52, 8);
};
Buffer.prototype.readDoubleBE = function readDoubleBE(
offset,
noAssert
) {
offset = offset >>> 0;
if (!noAssert) checkOffset(offset, 8, this.length);
return ieee754.read(this, offset, false, 52, 8);
};
function checkInt(buf, value, offset, ext, max, min) {
if (!Buffer.isBuffer(buf))
throw new TypeError('"buffer" argument must be a Buffer instance');
if (value > max || value < min)
throw new RangeError('"value" argument is out of bounds');
if (offset + ext > buf.length)
throw new RangeError("Index out of range");
}
Buffer.prototype.writeUIntLE = function writeUIntLE(
value,
offset,
byteLength,
noAssert
) {
value = +value;
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1;
checkInt(this, value, offset, byteLength, maxBytes, 0);
}
var mul = 1;
var i = 0;
this[offset] = value & 255;
while (++i < byteLength && (mul *= 256)) {
this[offset + i] = (value / mul) & 255;
}
return offset + byteLength;
};
Buffer.prototype.writeUIntBE = function writeUIntBE(
value,
offset,
byteLength,
noAssert
) {
value = +value;
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) {
var maxBytes = Math.pow(2, 8 * byteLength) - 1;
checkInt(this, value, offset, byteLength, maxBytes, 0);
}
var i = byteLength - 1;
var mul = 1;
this[offset + i] = value & 255;
while (--i >= 0 && (mul *= 256)) {
this[offset + i] = (value / mul) & 255;
}
return offset + byteLength;
};
Buffer.prototype.writeUInt8 = function writeUInt8(
value,
offset,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) checkInt(this, value, offset, 1, 255, 0);
this[offset] = value & 255;
return offset + 1;
};
Buffer.prototype.writeUInt16LE = function writeUInt16LE(
value,
offset,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) checkInt(this, value, offset, 2, 65535, 0);
this[offset] = value & 255;
this[offset + 1] = value >>> 8;
return offset + 2;
};
Buffer.prototype.writeUInt16BE = function writeUInt16BE(
value,
offset,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) checkInt(this, value, offset, 2, 65535, 0);
this[offset] = value >>> 8;
this[offset + 1] = value & 255;
return offset + 2;
};
Buffer.prototype.writeUInt32LE = function writeUInt32LE(
value,
offset,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) checkInt(this, value, offset, 4, 4294967295, 0);
this[offset + 3] = value >>> 24;
this[offset + 2] = value >>> 16;
this[offset + 1] = value >>> 8;
this[offset] = value & 255;
return offset + 4;
};
Buffer.prototype.writeUInt32BE = function writeUInt32BE(
value,
offset,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) checkInt(this, value, offset, 4, 4294967295, 0);
this[offset] = value >>> 24;
this[offset + 1] = value >>> 16;
this[offset + 2] = value >>> 8;
this[offset + 3] = value & 255;
return offset + 4;
};
Buffer.prototype.writeIntLE = function writeIntLE(
value,
offset,
byteLength,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1);
checkInt(this, value, offset, byteLength, limit - 1, -limit);
}
var i = 0;
var mul = 1;
var sub = 0;
this[offset] = value & 255;
while (++i < byteLength && (mul *= 256)) {
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0) {
sub = 1;
}
this[offset + i] = (((value / mul) >> 0) - sub) & 255;
}
return offset + byteLength;
};
Buffer.prototype.writeIntBE = function writeIntBE(
value,
offset,
byteLength,
noAssert
) {
value = +value;
offset = offset >>> 0;
if (!noAssert) {
var limit = Math.pow(2, 8 * byteLength - 1);
checkInt(this, value, offset, byteLength, limit - 1, -limit);
}
var i = byteLength - 1;
var mul = 1;
var sub = 0;
this[offset + i] = value & 255;
while (--i >= 0 && (mul *= 256)) {
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0) {
sub = 1;
}
this[offset + i] = (((value / mul) >> 0) - sub) & 255;
}
return offset + byteLength;
};
Buffer.prototype.writeInt8 = function writeInt8(
value,
offset,