/* eslint-disable require-buffer */
/**
* @module buffer
*/
'use strict';
const binding = process.binding('buffer');
const { isArrayBuffer } = process.binding('util');
const bindingObj = {};
const internalUtil = require('internal/util');
//Orel. Fixes for Spidermonkey
function getBufferLength(size) {
return size * 1 > binding.kMaxLength ? -1 : size >>> 0;
}
class FastBuffer extends Uint8Array {
constructor(...args){
//Orel. Fixes for Spidermonkey
if ((args.length === 1) && (typeof(args[0])==='number')) {
super(getBufferLength(args[0]))
} else {
super(...args);
}
}
}
FastBuffer.prototype.constructor = Buffer;
Buffer.prototype = FastBuffer.prototype;
exports.Buffer = Buffer;
exports.SlowBuffer = SlowBuffer;
exports.INSPECT_MAX_BYTES = 50;
exports.kMaxLength = binding.kMaxLength;
const kFromErrorMsg = 'First argument must be a string, Buffer, ' +
'ArrayBuffer, Array, or array-like object.';
Buffer.poolSize = 8 * 1024;
var poolSize, poolOffset, allocPool;
binding.setupBufferJS(Buffer.prototype, bindingObj);
// |binding.zeroFill| can be undefined when running inside an isolate where we
// do not own the ArrayBuffer allocator. Zero fill is always on in that case.
const zeroFill = bindingObj.zeroFill || [0];
function createUnsafeBuffer(size) {
return new FastBuffer(createUnsafeArrayBuffer(size));
}
function createUnsafeArrayBuffer(size) {
zeroFill[0] = 0;
try {
//Orel. Fixes for Spidermonkey
return new ArrayBuffer(getBufferLength(size));
} finally {
zeroFill[0] = 1;
}
}
function createPool() {
poolSize = Buffer.poolSize;
allocPool = createUnsafeArrayBuffer(poolSize);
poolOffset = 0;
}
createPool();
function alignPool() {
// Ensure aligned slices
if (poolOffset & 0x7) {
poolOffset |= 0x7;
poolOffset++;
}
}
/**
* The Buffer() construtor is "soft deprecated" ... that is, it is deprecated
* in the documentation and should not be used moving forward. Rather,
* developers should use one of the three new factory APIs: Buffer.from(),
* Buffer.allocUnsafe() or Buffer.alloc() based on their specific needs. There
* is no hard deprecation because of the extent to which the Buffer constructor
* is used in the ecosystem currently -- a hard deprecation would introduce too
* much breakage at this time. It's not likely that the Buffer constructors
* would ever actually be removed.
**/
var newBufferWarned = false;
function Buffer(arg, encodingOrOffset, length) {
if (!new.target && !newBufferWarned) {
newBufferWarned = true;
process.emitWarning(
'Using Buffer without `new` will soon stop working. ' +
'Use `new Buffer()`, or preferably ' +
'`Buffer.from()`, `Buffer.allocUnsafe()` or `Buffer.alloc()` instead.',
'DeprecationWarning'
);
}
// Common case.
if (typeof arg === 'number') {
if (typeof encodingOrOffset === 'string') {
throw new Error(
'If encoding is specified then the first argument must be a string'
);
}
return Buffer.allocUnsafe(arg);
}
return Buffer.from(arg, encodingOrOffset, length);
}
/**
* Functionally equivalent to Buffer(arg, encoding) but throws a TypeError
* if value is a number.
* Buffer.from(str[, encoding])
* Buffer.from(array)
* Buffer.from(buffer)
* Buffer.from(arrayBuffer[, byteOffset[, length]])
**/
Buffer.from = function(value, encodingOrOffset, length) {
if (typeof value === 'number')
throw new TypeError('"value" argument must not be a number');
if (value instanceof ArrayBuffer)
return fromArrayBuffer(value, encodingOrOffset, length);
if (typeof value === 'string')
return fromString(value, encodingOrOffset);
return fromObject(value);
};
Object.setPrototypeOf(Buffer, Uint8Array);
function assertSize(size) {
let err = null;
if (typeof size !== 'number')
err = new TypeError('"size" argument must be a number');
else if (size < 0)
err = new RangeError('"size" argument must not be negative');
if (err) {
// The following hides the 'assertSize' method from the
// callstack. This is done simply to hide the internal
// details of the implementation from bleeding out to users.
if (Error.captureStackTrace) {
// Chrome and NodeJS
Error.captureStackTrace(err, assertSize);
}
throw err;
}
}
/**
* Creates a new filled Buffer instance.
* alloc(size[, fill[, encoding]])
**/
Buffer.alloc = function(size, fill, encoding) {
assertSize(size);
if (size > 0 && fill !== undefined) {
// Since we are filling anyway, don't zero fill initially.
// Only pay attention to encoding if it's a string. This
// prevents accidentally sending in a number that would
// be interpretted as a start offset.
if (typeof encoding !== 'string')
encoding = undefined;
return createUnsafeBuffer(size).fill(fill, encoding);
}
return new FastBuffer(size);
};
/**
* Equivalent to Buffer(num), by default creates a non-zero-filled Buffer
* instance. If `--zero-fill-buffers` is set, will zero-fill the buffer.
**/
Buffer.allocUnsafe = function(size) {
assertSize(size);
return allocate(size);
};
/**
* Equivalent to SlowBuffer(num), by default creates a non-zero-filled
* Buffer instance that is not allocated off the pre-initialized pool.
* If `--zero-fill-buffers` is set, will zero-fill the buffer.
**/
Buffer.allocUnsafeSlow = function(size) {
assertSize(size);
return createUnsafeBuffer(size);
};
// If --zero-fill-buffers command line argument is set, a zero-filled
// buffer is returned.
function SlowBuffer(length) {
if (+length != length)
length = 0;
return createUnsafeBuffer(+length);
}
Object.setPrototypeOf(SlowBuffer.prototype, Uint8Array.prototype);
Object.setPrototypeOf(SlowBuffer, Uint8Array);
function allocate(size) {
if (size <= 0) {
return new FastBuffer();
}
if (size < (Buffer.poolSize >>> 1)) {
if (size > (poolSize - poolOffset))
createPool();
var b = new FastBuffer(allocPool, poolOffset, size);
poolOffset += size;
alignPool();
return b;
} else {
return createUnsafeBuffer(size);
}
}
function fromString(string, encoding) {
if (typeof encoding !== 'string' || encoding === '')
encoding = 'utf8';
if (!Buffer.isEncoding(encoding))
throw new TypeError('"encoding" must be a valid string encoding');
if (string.length === 0)
return new FastBuffer();
var length = byteLength(string, encoding);
if (length >= (Buffer.poolSize >>> 1))
return binding.createFromString(string, encoding);
if (length > (poolSize - poolOffset))
createPool();
var b = new FastBuffer(allocPool, poolOffset, length);
var actual = b.write(string, encoding);
if (actual !== length) {
// byteLength() may overestimate. That’s a rare case, though.
b = new FastBuffer(allocPool, poolOffset, actual);
}
poolOffset += actual;
alignPool();
return b;
}
function fromArrayLike(obj) {
const length = obj.length;
const b = allocate(length);
for (var i = 0; i < length; i++)
b[i] = obj[i];
return b;
}
function fromArrayBuffer(obj, byteOffset, length) {
if (!isArrayBuffer(obj))
throw new TypeError('argument is not an ArrayBuffer');
byteOffset >>>= 0;
const maxLength = obj.byteLength - byteOffset;
if (maxLength < 0)
throw new RangeError("'offset' is out of bounds");
if (length === undefined) {
length = maxLength;
} else {
length >>>= 0;
if (length > maxLength)
throw new RangeError("'length' is out of bounds");
}
return new FastBuffer(obj, byteOffset, length);
}
function fromObject(obj) {
if (obj instanceof Buffer) {
const b = allocate(obj.length);
if (b.length === 0)
return b;
obj.copy(b, 0, 0, obj.length);
return b;
}
if (obj) {
if (obj.buffer instanceof ArrayBuffer || 'length' in obj) {
if (typeof obj.length !== 'number' || obj.length !== obj.length) {
return new FastBuffer();
}
return fromArrayLike(obj);
}
if (obj.type === 'Buffer' && Array.isArray(obj.data)) {
return fromArrayLike(obj.data);
}
}
throw new TypeError(kFromErrorMsg);
}
// Static methods
Buffer.isBuffer = function isBuffer(b) {
return b instanceof Buffer;
};
Buffer.compare = function compare(a, b) {
if (!(a instanceof Buffer) ||
!(b instanceof Buffer)) {
throw new TypeError('Arguments must be Buffers');
}
if (a === b) {
return 0;
}
return binding.compare(a, b);
};
Buffer.isEncoding = function(encoding) {
return typeof encoding === 'string' &&
typeof internalUtil.normalizeEncoding(encoding) === 'string';
};
Buffer[internalUtil.kIsEncodingSymbol] = Buffer.isEncoding;
Buffer.concat = function(list, length) {
var i;
if (!Array.isArray(list))
throw new TypeError('"list" argument must be an Array of Buffers');
if (list.length === 0)
return new FastBuffer();
if (length === undefined) {
length = 0;
for (i = 0; i < list.length; i++)
length += list[i].length;
} else {
length = length >>> 0;
}
var buffer = Buffer.allocUnsafe(length);
var pos = 0;
for (i = 0; i < list.length; i++) {
var buf = list[i];
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 base64ByteLength(str, bytes) {
// Handle padding
if (str.charCodeAt(bytes - 1) === 0x3D)
bytes--;
if (bytes > 1 && str.charCodeAt(bytes - 1) === 0x3D)
bytes--;
// Base64 ratio: 3/4
return (bytes * 3) >>> 2;
}
function byteLength(string, encoding) {
if (typeof string !== 'string') {
if (ArrayBuffer.isView(string) || string instanceof ArrayBuffer)
return string.byteLength;
string = '' + string;
}
var len = string.length;
if (len === 0)
return 0;
// Use a for loop to avoid recursion
var loweredCase = false;
for (;;) {
switch (encoding) {
case 'ascii':
case 'latin1':
case 'binary':
return len;
case 'utf8':
case 'utf-8':
case undefined:
return binding.byteLengthUtf8(string);
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return len * 2;
case 'hex':
return len >>> 1;
case 'base64':
return base64ByteLength(string, len);
default:
// The C++ binding defaulted to UTF8, we should too.
if (loweredCase)
return binding.byteLengthUtf8(string);
encoding = ('' + encoding).toLowerCase();
loweredCase = true;
}
}
}
Buffer.byteLength = byteLength;
// For backwards compatibility.
Object.defineProperty(Buffer.prototype, 'parent', {
enumerable: true,
get: function() {
if (!(this instanceof Buffer))
return undefined;
if (this.byteLength === 0 ||
this.byteLength === this.buffer.byteLength) {
return undefined;
}
return this.buffer;
}
});
Object.defineProperty(Buffer.prototype, 'offset', {
enumerable: true,
get: function() {
if (!(this instanceof Buffer))
return undefined;
return this.byteOffset;
}
});
function slowToString(encoding, start, end) {
var loweredCase = false;
// No need to verify that "this.length <= MAX_UINT32" since it's a read-only
// property of a typed array.
// This behaves neither like String nor Uint8Array in that we set start/end
// to their upper/lower bounds if the value passed is out of range.
// undefined is handled specially as per ECMA-262 6th Edition,
// Section 13.3.3.7 Runtime Semantics: KeyedBindingInitialization.
if (start === undefined || start < 0)
start = 0;
// Return early if start > this.length. Done here to prevent potential uint32
// coercion fail below.
if (start > this.length)
return '';
if (end === undefined || end > this.length)
end = this.length;
if (end <= 0)
return '';
// Force coersion to uint32. This will also coerce falsey/NaN values to 0.
end >>>= 0;
start >>>= 0;
if (end <= start)
return '';
if (!encoding) encoding = 'utf8';
while (true) {
switch (encoding) {
case 'hex':
return this.hexSlice(start, end);
case 'utf8':
case 'utf-8':
return this.utf8Slice(start, end);
case 'ascii':
return this.asciiSlice(start, end);
case 'latin1':
case 'binary':
return this.latin1Slice(start, end);
case 'base64':
return this.base64Slice(start, end);
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return this.ucs2Slice(start, end);
default:
if (loweredCase)
throw new TypeError('Unknown encoding: ' + encoding);
encoding = (encoding + '').toLowerCase();
loweredCase = true;
}
}
}
Buffer.prototype.toString = function() {
let result;
if (arguments.length === 0) {
result = this.utf8Slice(0, this.length);
} else {
result = slowToString.apply(this, arguments);
}
if (result === undefined)
throw new Error('"toString()" failed');
return result;
};
Buffer.prototype.equals = function equals(b) {
if (!(b instanceof Buffer))
throw new TypeError('Argument must be a Buffer');
if (this === b)
return true;
return binding.compare(this, b) === 0;
};
// Override how buffers are presented by util.inspect().
Buffer.prototype[internalUtil.inspectSymbol] = function inspect() {
var str = '';
var max = exports.INSPECT_MAX_BYTES;
if (this.length > 0) {
str = this.toString('hex', 0, max).match(/.{2}/g).join(' ');
if (this.length > max)
str += ' ... ';
}
return '<' + this.constructor.name + ' ' + str + '>';
};
Buffer.prototype.inspect = Buffer.prototype[internalUtil.inspectSymbol];
Buffer.prototype.compare = function compare(target,
start,
end,
thisStart,
thisEnd) {
if (!(target instanceof Buffer))
throw new TypeError('Argument must be a Buffer');
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;
return binding.compareOffset(this, target, start, thisStart, end, thisEnd);
};
// Finds either the first index of `val` in `buffer` at offset >= `byteOffset`,
// OR the last index of `val` in `buffer` at offset <= `byteOffset`.
//
// Arguments:
// - buffer - a Buffer to search
// - val - a string, Buffer, or number
// - byteOffset - an index into `buffer`; will be clamped to an int32
// - encoding - an optional encoding, relevant is val is a string
// - dir - true for indexOf, false for lastIndexOf
function bidirectionalIndexOf(buffer, val, byteOffset, encoding, dir) {
if (typeof byteOffset === 'string') {
encoding = byteOffset;
byteOffset = undefined;
} else if (byteOffset > 0x7fffffff) {
byteOffset = 0x7fffffff;
} else if (byteOffset < -0x80000000) {
byteOffset = -0x80000000;
}
byteOffset = +byteOffset; // Coerce to Number.
if (isNaN(byteOffset)) {
// If the offset is undefined, null, NaN, "foo", etc, search whole buffer.
byteOffset = dir ? 0 : (buffer.length - 1);
}
dir = !!dir; // Cast to bool.
if (typeof val === 'string') {
if (encoding === undefined) {
return binding.indexOfString(buffer, val, byteOffset, encoding, dir);
}
return slowIndexOf(buffer, val, byteOffset, encoding, dir);
} else if (val instanceof Buffer) {
return binding.indexOfBuffer(buffer, val, byteOffset, encoding, dir);
} else if (typeof val === 'number') {
return binding.indexOfNumber(buffer, val, byteOffset, dir);
}
throw new TypeError('"val" argument must be string, number or Buffer');
}
function slowIndexOf(buffer, val, byteOffset, encoding, dir) {
var loweredCase = false;
for (;;) {
switch (encoding) {
case 'utf8':
case 'utf-8':
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
case 'latin1':
case 'binary':
return binding.indexOfString(buffer, val, byteOffset, encoding, dir);
case 'base64':
case 'ascii':
case 'hex':
return binding.indexOfBuffer(
buffer, Buffer.from(val, encoding), byteOffset, encoding, dir);
default:
if (loweredCase) {
throw new TypeError('Unknown encoding: ' + encoding);
}
encoding = ('' + encoding).toLowerCase();
loweredCase = true;
}
}
}
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);
};
Buffer.prototype.includes = function includes(val, byteOffset, encoding) {
return this.indexOf(val, byteOffset, encoding) !== -1;
};
// Usage:
// buffer.fill(number[, offset[, end]])
// buffer.fill(buffer[, offset[, end]])
// buffer.fill(string[, offset[, end]][, encoding])
Buffer.prototype.fill = function fill(val, start, end, encoding) {
// Handle string cases:
if (typeof val === 'string') {
if (typeof start === 'string') {
encoding = start;
start = 0;
end = this.length;
} else if (typeof end === 'string') {
encoding = end;
end = this.length;
}
if (val.length === 1) {
var code = val.charCodeAt(0);
if (code < 256)
val = code;
}
if (val.length === 0) {
// Previously, if val === '', the Buffer would not fill,
// which is rather surprising.
val = 0;
}
if (encoding !== undefined && typeof encoding !== 'string') {
throw new TypeError('encoding must be a string');
}
if (typeof encoding === 'string' && !Buffer.isEncoding(encoding)) {
throw new TypeError('Unknown encoding: ' + encoding);
}
} else if (typeof val === 'number') {
val = val & 255;
}
// Invalid ranges are not set to a default, so can range check early.
if (start < 0 || end > this.length)
throw new RangeError('Out of range index');
if (end <= start)
return this;
start = start >>> 0;
end = end === undefined ? this.length : end >>> 0;
binding.fill(this, val, start, end, encoding);
return this;
};
Buffer.prototype.write = function(string, offset, length, encoding) {
// Buffer#write(string);
if (offset === undefined) {
encoding = 'utf8';
length = this.length;
offset = 0;
// Buffer#write(string, encoding)
} else if (length === undefined && typeof offset === 'string') {
encoding = offset;
length = this.length;
offset = 0;
// Buffer#write(string, offset[, length][, encoding])
} else if (isFinite(offset)) {
offset = offset >>> 0;
if (isFinite(length)) {
length = length >>> 0;
if (encoding === undefined)
encoding = 'utf8';
} else {
encoding = length;
length = undefined;
}
} else {
// if someone is still calling the obsolete form of write(), tell them.
// we don't want eg buf.write("foo", "utf8", 10) to silently turn into
// buf.write("foo", "utf8"), so we can't ignore extra args
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))
throw new RangeError('Attempt to write outside buffer bounds');
if (!encoding)
encoding = 'utf8';
var loweredCase = false;
for (;;) {
switch (encoding) {
case 'hex':
return this.hexWrite(string, offset, length);
case 'utf8':
case 'utf-8':
return this.utf8Write(string, offset, length);
case 'ascii':
return this.asciiWrite(string, offset, length);
case 'latin1':
case 'binary':
return this.latin1Write(string, offset, length);
case 'base64':
// Warning: maxLength not taken into account in base64Write
return this.base64Write(string, offset, length);
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
return this.ucs2Write(string, offset, length);
default:
if (loweredCase)
throw new TypeError('Unknown encoding: ' + encoding);
encoding = ('' + encoding).toLowerCase();
loweredCase = true;
}
}
};
Buffer.prototype.toJSON = function() {
return {
type: 'Buffer',
data: Array.prototype.slice.call(this, 0)
};
};
function adjustOffset(offset, length) {
offset = +offset;
if (offset === 0 || Number.isNaN(offset)) {
return 0;
}
if (offset < 0) {
offset += length;
return offset > 0 ? offset : 0;
} else {
return offset < length ? offset : length;
}
}
Buffer.prototype.slice = function slice(start, end) {
const srcLength = this.length;
start = adjustOffset(start, srcLength);
end = end !== undefined ? adjustOffset(end, srcLength) : srcLength;
const newLength = end > start ? end - start : 0;
return new FastBuffer(this.buffer, this.byteOffset + start, newLength);
};
function checkOffset(offset, ext, length) {
if (offset + ext > length)
throw new RangeError('Index out of range');
}
Buffer.prototype.readUIntLE = function(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 *= 0x100))
val += this[offset + i] * mul;
return val;
};
Buffer.prototype.readUIntBE = function(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 *= 0x100))
val += this[offset + --byteLength] * mul;
return val;
};
Buffer.prototype.readUInt8 = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 1, this.length);
return this[offset];
};
Buffer.prototype.readUInt16LE = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 2, this.length);
return this[offset] | (this[offset + 1] << 8);
};
Buffer.prototype.readUInt16BE = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 2, this.length);
return (this[offset] << 8) | this[offset + 1];
};
Buffer.prototype.readUInt32LE = function(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] * 0x1000000);
};
Buffer.prototype.readUInt32BE = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 4, this.length);
return (this[offset] * 0x1000000) +
((this[offset + 1] << 16) |
(this[offset + 2] << 8) |
this[offset + 3]);
};
Buffer.prototype.readIntLE = function(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 *= 0x100))
val += this[offset + i] * mul;
mul *= 0x80;
if (val >= mul)
val -= Math.pow(2, 8 * byteLength);
return val;
};
Buffer.prototype.readIntBE = function(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 *= 0x100))
val += this[offset + --i] * mul;
mul *= 0x80;
if (val >= mul)
val -= Math.pow(2, 8 * byteLength);
return val;
};
Buffer.prototype.readInt8 = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 1, this.length);
var val = this[offset];
return !(val & 0x80) ? val : (0xff - val + 1) * -1;
};
Buffer.prototype.readInt16LE = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 2, this.length);
var val = this[offset] | (this[offset + 1] << 8);
return (val & 0x8000) ? val | 0xFFFF0000 : val;
};
Buffer.prototype.readInt16BE = function(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 2, this.length);
var val = this[offset + 1] | (this[offset] << 8);
return (val & 0x8000) ? val | 0xFFFF0000 : val;
};
Buffer.prototype.readInt32LE = function(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(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 binding.readFloatLE(this, offset);
};
Buffer.prototype.readFloatBE = function readFloatBE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 4, this.length);
return binding.readFloatBE(this, offset);
};
Buffer.prototype.readDoubleLE = function readDoubleLE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 8, this.length);
return binding.readDoubleLE(this, offset);
};
Buffer.prototype.readDoubleBE = function readDoubleBE(offset, noAssert) {
offset = offset >>> 0;
if (!noAssert)
checkOffset(offset, 8, this.length);
return binding.readDoubleBE(this, offset);
};
function checkInt(buffer, value, offset, ext, max, min) {
if (!(buffer instanceof Buffer))
throw new TypeError('"buffer" argument must be a Buffer instance');
if (value > max || value < min)
throw new TypeError('"value" argument is out of bounds');
if (offset + ext > buffer.length)
throw new RangeError('Index out of range');
}
Buffer.prototype.writeUIntLE = function(value, offset, byteLength, noAssert) {
value = +value;
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) {
const maxBytes = Math.pow(2, 8 * byteLength) - 1;
checkInt(this, value, offset, byteLength, maxBytes, 0);
}
var mul = 1;
var i = 0;
this[offset] = value;
while (++i < byteLength && (mul *= 0x100))
this[offset + i] = (value / mul) >>> 0;
return offset + byteLength;
};
Buffer.prototype.writeUIntBE = function(value, offset, byteLength, noAssert) {
value = +value;
offset = offset >>> 0;
byteLength = byteLength >>> 0;
if (!noAssert) {
const 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;
while (--i >= 0 && (mul *= 0x100))
this[offset + i] = (value / mul) >>> 0;
return offset + byteLength;
};
Buffer.prototype.writeUInt8 = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 1, 0xff, 0);
this[offset] = value;
return offset + 1;
};
Buffer.prototype.writeUInt16LE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 2, 0xffff, 0);
this[offset] = value;
this[offset + 1] = (value >>> 8);
return offset + 2;
};
Buffer.prototype.writeUInt16BE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 2, 0xffff, 0);
this[offset] = (value >>> 8);
this[offset + 1] = value;
return offset + 2;
};
Buffer.prototype.writeUInt32LE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 4, 0xffffffff, 0);
this[offset + 3] = (value >>> 24);
this[offset + 2] = (value >>> 16);
this[offset + 1] = (value >>> 8);
this[offset] = value;
return offset + 4;
};
Buffer.prototype.writeUInt32BE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 4, 0xffffffff, 0);
this[offset] = (value >>> 24);
this[offset + 1] = (value >>> 16);
this[offset + 2] = (value >>> 8);
this[offset + 3] = value;
return offset + 4;
};
Buffer.prototype.writeIntLE = function(value, offset, byteLength, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert) {
checkInt(this,
value,
offset,
byteLength,
Math.pow(2, 8 * byteLength - 1) - 1,
-Math.pow(2, 8 * byteLength - 1));
}
var i = 0;
var mul = 1;
var sub = 0;
this[offset] = value;
while (++i < byteLength && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i - 1] !== 0)
sub = 1;
this[offset + i] = ((value / mul) >> 0) - sub;
}
return offset + byteLength;
};
Buffer.prototype.writeIntBE = function(value, offset, byteLength, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert) {
checkInt(this,
value,
offset,
byteLength,
Math.pow(2, 8 * byteLength - 1) - 1,
-Math.pow(2, 8 * byteLength - 1));
}
var i = byteLength - 1;
var mul = 1;
var sub = 0;
this[offset + i] = value;
while (--i >= 0 && (mul *= 0x100)) {
if (value < 0 && sub === 0 && this[offset + i + 1] !== 0)
sub = 1;
this[offset + i] = ((value / mul) >> 0) - sub;
}
return offset + byteLength;
};
Buffer.prototype.writeInt8 = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 1, 0x7f, -0x80);
this[offset] = value;
return offset + 1;
};
Buffer.prototype.writeInt16LE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 2, 0x7fff, -0x8000);
this[offset] = value;
this[offset + 1] = (value >>> 8);
return offset + 2;
};
Buffer.prototype.writeInt16BE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 2, 0x7fff, -0x8000);
this[offset] = (value >>> 8);
this[offset + 1] = value;
return offset + 2;
};
Buffer.prototype.writeInt32LE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
this[offset] = value;
this[offset + 1] = (value >>> 8);
this[offset + 2] = (value >>> 16);
this[offset + 3] = (value >>> 24);
return offset + 4;
};
Buffer.prototype.writeInt32BE = function(value, offset, noAssert) {
value = +value;
offset = offset >>> 0;
if (!noAssert)
checkInt(this, value, offset, 4, 0x7fffffff, -0x80000000);
this[offset] = (value >>> 24);
this[offset + 1] = (value >>> 16);
this[offset + 2] = (value >>> 8);
this[offset + 3] = value;
return offset + 4;
};
Buffer.prototype.writeFloatLE = function writeFloatLE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
binding.writeFloatLE(this, val, offset);
else
binding.writeFloatLE(this, val, offset, true);
return offset + 4;
};
Buffer.prototype.writeFloatBE = function writeFloatBE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
binding.writeFloatBE(this, val, offset);
else
binding.writeFloatBE(this, val, offset, true);
return offset + 4;
};
Buffer.prototype.writeDoubleLE = function writeDoubleLE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
binding.writeDoubleLE(this, val, offset);
else
binding.writeDoubleLE(this, val, offset, true);
return offset + 8;
};
Buffer.prototype.writeDoubleBE = function writeDoubleBE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
binding.writeDoubleBE(this, val, offset);
else
binding.writeDoubleBE(this, val, offset, true);
return offset + 8;
};
const swap16n = binding.swap16;
const swap32n = binding.swap32;
const swap64n = binding.swap64;
function swap(b, n, m) {
const i = b[n];
b[n] = b[m];
b[m] = i;
}
Buffer.prototype.swap16 = function swap16() {
// For Buffer.length < 128, it's generally faster to
// do the swap in javascript. For larger buffers,
// dropping down to the native code is faster.
const len = this.length;
if (len % 2 !== 0)
throw new RangeError('Buffer size must be a multiple of 16-bits');
if (len < 128) {
for (var i = 0; i < len; i += 2)
swap(this, i, i + 1);
return this;
}
return swap16n(this);
};
Buffer.prototype.swap32 = function swap32() {
// For Buffer.length < 192, it's generally faster to
// do the swap in javascript. For larger buffers,
// dropping down to the native code is faster.
const len = this.length;
if (len % 4 !== 0)
throw new RangeError('Buffer size must be a multiple of 32-bits');
if (len < 192) {
for (var i = 0; i < len; i += 4) {
swap(this, i, i + 3);
swap(this, i + 1, i + 2);
}
return this;
}
return swap32n(this);
};
Buffer.prototype.swap64 = function swap64() {
// For Buffer.length < 192, it's generally faster to
// do the swap in javascript. For larger buffers,
// dropping down to the native code is faster.
const len = this.length;
if (len % 8 !== 0)
throw new RangeError('Buffer size must be a multiple of 64-bits');
if (len < 192) {
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;
}
return swap64n(this);
};
Buffer.prototype.toLocaleString = Buffer.prototype.toString;