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/* eslint-disable require-buffer */
'use strict';
const binding = process.binding('buffer');
const smalloc = process.binding('smalloc');
const internalUtil = require('internal/util');
const alloc = smalloc.alloc;
const truncate = smalloc.truncate;
const sliceOnto = smalloc.sliceOnto;
const kMaxLength = smalloc.kMaxLength;
exports.Buffer = Buffer;
exports.SlowBuffer = SlowBuffer;
exports.INSPECT_MAX_BYTES = 50;
Buffer.poolSize = 8 * 1024;
var poolSize, poolOffset, allocPool;
function createPool() {
poolSize = Buffer.poolSize;
allocPool = alloc({}, poolSize);
poolOffset = 0;
}
createPool();
function Buffer(arg) {
if (!(this instanceof Buffer)) {
// Avoid going through an ArgumentsAdaptorTrampoline in the common case.
if (arguments.length > 1)
return new Buffer(arg, arguments[1]);
return new Buffer(arg);
}
this.length = 0;
this.parent = undefined;
// Common case.
if (typeof(arg) === 'number') {
fromNumber(this, arg);
return;
}
// Slightly less common case.
if (typeof(arg) === 'string') {
fromString(this, arg, arguments.length > 1 ? arguments[1] : 'utf8');
return;
}
// Unusual.
fromObject(this, arg);
}
function fromNumber(that, length) {
allocate(that, length < 0 ? 0 : checked(length) | 0);
}
function fromString(that, string, encoding) {
if (typeof(encoding) !== 'string' || encoding === '')
encoding = 'utf8';
// Assumption: byteLength() return value is always < kMaxLength.
var length = byteLength(string, encoding) | 0;
allocate(that, length);
var actual = that.write(string, encoding) | 0;
if (actual !== length) {
// Fix up for truncated base64 input. Don't bother returning
// the unused two or three bytes to the pool.
that.length = actual;
truncate(that, actual);
}
}
function fromObject(that, object) {
if (object instanceof Buffer)
return fromBuffer(that, object);
if (Array.isArray(object))
return fromArray(that, object);
if (object == null)
throw new TypeError('must start with number, buffer, array or string');
if (object.buffer instanceof ArrayBuffer)
return fromTypedArray(that, object);
if (object.length)
return fromArrayLike(that, object);
return fromJsonObject(that, object);
}
function fromBuffer(that, buffer) {
var length = checked(buffer.length) | 0;
allocate(that, length);
buffer.copy(that, 0, 0, length);
}
function fromArray(that, array) {
var length = checked(array.length) | 0;
allocate(that, length);
for (var i = 0; i < length; i += 1)
that[i] = array[i] & 255;
}
// Duplicate of fromArray() to keep fromArray() monomorphic.
function fromTypedArray(that, array) {
var length = checked(array.length) | 0;
allocate(that, length);
// Truncating the elements is probably not what people expect from typed
// arrays with BYTES_PER_ELEMENT > 1 but it's compatible with the behavior
// of the old Buffer constructor.
for (var i = 0; i < length; i += 1)
that[i] = array[i] & 255;
}
function fromArrayLike(that, array) {
var length = checked(array.length) | 0;
allocate(that, length);
for (var i = 0; i < length; i += 1)
that[i] = array[i] & 255;
}
// Deserialize { type: 'Buffer', data: [1,2,3,...] } into a Buffer object.
// Returns a zero-length buffer for inputs that don't conform to the spec.
function fromJsonObject(that, object) {
var array;
var length = 0;
if (object.type === 'Buffer' && Array.isArray(object.data)) {
array = object.data;
length = checked(array.length) | 0;
}
allocate(that, length);
for (var i = 0; i < length; i += 1)
that[i] = array[i] & 255;
}
function allocate(that, length) {
var fromPool = length !== 0 && length <= Buffer.poolSize >>> 1;
if (fromPool)
that.parent = palloc(that, length);
else
alloc(that, length);
that.length = length;
}
function palloc(that, length) {
if (length > poolSize - poolOffset)
createPool();
var start = poolOffset;
var end = start + length;
var buf = sliceOnto(allocPool, that, start, end);
poolOffset = end;
// Ensure aligned slices
if (poolOffset & 0x7) {
poolOffset |= 0x7;
poolOffset++;
}
return buf;
}
function checked(length) {
// Note: cannot use `length < kMaxLength` here because that fails when
// length is NaN (which is otherwise coerced to zero.)
if (length >= kMaxLength) {
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
'size: 0x' + kMaxLength.toString(16) + ' bytes');
}
return length >>> 0;
}
function SlowBuffer(length) {
length = length >>> 0;
if (length > kMaxLength) {
throw new RangeError('Attempt to allocate Buffer larger than maximum ' +
'size: 0x' + kMaxLength.toString(16) + ' bytes');
}
var b = new NativeBuffer(length);
alloc(b, length);
return b;
}
// Bypass all checks for instantiating unallocated Buffer required for
// Objects created in C++. Significantly faster than calling the Buffer
// function.
function NativeBuffer(length) {
this.length = length >>> 0;
// Set this to keep the object map the same.
this.parent = undefined;
}
NativeBuffer.prototype = Buffer.prototype;
// add methods to Buffer prototype
binding.setupBufferJS(NativeBuffer);
// 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) {
switch ((encoding + '').toLowerCase()) {
case 'hex':
case 'utf8':
case 'utf-8':
case 'ascii':
case 'binary':
case 'base64':
case 'ucs2':
case 'ucs-2':
case 'utf16le':
case 'utf-16le':
case 'raw':
return true;
default:
return false;
}
};
Buffer.concat = function(list, length) {
if (!Array.isArray(list))
throw new TypeError('list argument must be an Array of Buffers.');
if (list.length === 0)
return new Buffer(0);
else if (list.length === 1)
return list[0];
if (length === undefined) {
length = 0;
for (var i = 0; i < list.length; i++)
length += list[i].length;
} else {
length = length >>> 0;
}
var buffer = new Buffer(length);
var pos = 0;
for (var i = 0; i < list.length; i++) {
var buf = list[i];
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')
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 'binary':
// Deprecated
case 'raw':
case 'raws':
return len;
case 'utf8':
case 'utf-8':
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;
function slowToString(encoding, start, end) {
var loweredCase = false;
start = start >>> 0;
end = end === undefined || end === Infinity ? this.length : end >>> 0;
if (!encoding) encoding = 'utf8';
if (start < 0) start = 0;
if (end > this.length) end = this.length;
if (end <= start) return '';
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 'binary':
return this.binarySlice(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() {
const length = this.length | 0;
if (arguments.length === 0)
return this.utf8Slice(0, length);
return slowToString.apply(this, arguments);
};
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;
};
// Inspect
Buffer.prototype.inspect = 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.compare = function compare(b) {
if (!(b instanceof Buffer))
throw new TypeError('Argument must be a Buffer');
if (this === b)
return 0;
return binding.compare(this, b);
};
Buffer.prototype.indexOf = function indexOf(val, byteOffset) {
if (byteOffset > 0x7fffffff)
byteOffset = 0x7fffffff;
else if (byteOffset < -0x80000000)
byteOffset = -0x80000000;
byteOffset >>= 0;
if (typeof val === 'string')
return binding.indexOfString(this, val, byteOffset);
if (val instanceof Buffer)
return binding.indexOfBuffer(this, val, byteOffset);
if (typeof val === 'number')
return binding.indexOfNumber(this, val, byteOffset);
throw new TypeError('val must be string, number or Buffer');
};
Buffer.prototype.fill = function fill(val, start, end) {
start = start >> 0;
end = (end === undefined) ? this.length : end >> 0;
if (start < 0 || end > this.length)
throw new RangeError('out of range index');
if (end <= start)
return this;
if (typeof val !== 'string') {
val = val >>> 0;
} else if (val.length === 1) {
var code = val.charCodeAt(0);
if (code < 256)
val = code;
}
binding.fill(this, val, start, end);
return this;
};
// XXX remove in v0.13
Buffer.prototype.get = internalUtil.deprecate(function get(offset) {
offset = ~~offset;
if (offset < 0 || offset >= this.length)
throw new RangeError('index out of range');
return this[offset];
}, 'Buffer.get is deprecated. Use array indexes instead.');
// XXX remove in v0.13
Buffer.prototype.set = internalUtil.deprecate(function set(offset, v) {
offset = ~~offset;
if (offset < 0 || offset >= this.length)
throw new RangeError('index out of range');
return this[offset] = v;
}, 'Buffer.set is deprecated. Use array indexes instead.');
// TODO(trevnorris): fix these checks to follow new standard
// write(string, offset = 0, length = buffer.length, encoding = 'utf8')
var writeWarned = false;
const writeMsg = 'Buffer.write(string, encoding, offset, length) is ' +
'deprecated. Use write(string[, offset[, length]]' +
'[, encoding]) instead.';
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;
}
// XXX legacy write(string, encoding, offset, length) - remove in v0.13
} else {
writeWarned = internalUtil.printDeprecationMessage(writeMsg, writeWarned);
var swap = encoding;
encoding = offset;
offset = length >>> 0;
length = swap;
}
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 'binary':
return this.binaryWrite(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)
};
};
// TODO(trevnorris): currently works like Array.prototype.slice(), which
// doesn't follow the new standard for throwing on out of range indexes.
Buffer.prototype.slice = function(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 buf = new NativeBuffer();
sliceOnto(this, buf, start, end);
buf.length = end - start;
if (buf.length > 0)
buf.parent = this.parent === undefined ? this : this.parent;
return buf;
};
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 must be a Buffer instance');
if (value > max || value < min)
throw new TypeError('value 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)
checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 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)
checkInt(this, value, offset, byteLength, Math.pow(2, 8 * byteLength), 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 = value < 0 ? 1 : 0;
this[offset] = value;
while (++i < byteLength && (mul *= 0x100))
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 = value < 0 ? 1 : 0;
this[offset + i] = value;
while (--i >= 0 && (mul *= 0x100))
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;
};
function checkFloat(buffer, value, offset, ext) {
if (!(buffer instanceof Buffer))
throw new TypeError('buffer must be a Buffer instance');
if (offset + ext > buffer.length)
throw new RangeError('index out of range');
}
Buffer.prototype.writeFloatLE = function writeFloatLE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
checkFloat(this, val, offset, 4);
binding.writeFloatLE(this, val, offset);
return offset + 4;
};
Buffer.prototype.writeFloatBE = function writeFloatBE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
checkFloat(this, val, offset, 4);
binding.writeFloatBE(this, val, offset);
return offset + 4;
};
Buffer.prototype.writeDoubleLE = function writeDoubleLE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
checkFloat(this, val, offset, 8);
binding.writeDoubleLE(this, val, offset);
return offset + 8;
};
Buffer.prototype.writeDoubleBE = function writeDoubleBE(val, offset, noAssert) {
val = +val;
offset = offset >>> 0;
if (!noAssert)
checkFloat(this, val, offset, 8);
binding.writeDoubleBE(this, val, offset);
return offset + 8;
};
// ES6 iterator
var ITERATOR_KIND_KEYS = 1;
var ITERATOR_KIND_ENTRIES = 3;
function BufferIteratorResult(value, done) {
this.value = value;
this.done = done;
}
var resultCache = new Array(256);
for (var i = 0; i < 256; i++)
resultCache[i] = Object.freeze(new BufferIteratorResult(i, false));
var finalResult = Object.freeze(new BufferIteratorResult(undefined, true));
function BufferIterator(buffer, kind) {
this._buffer = buffer;
this._kind = kind;
this._index = 0;
}
BufferIterator.prototype.next = function() {
var buffer = this._buffer;
var kind = this._kind;
var index = this._index;
if (index >= buffer.length)
return finalResult;
this._index++;
if (kind === ITERATOR_KIND_ENTRIES)
return new BufferIteratorResult([index, buffer[index]], false);
return new BufferIteratorResult(index, false);
};
function BufferValueIterator(buffer) {
BufferIterator.call(this, buffer, null);
}
BufferValueIterator.prototype.next = function() {
var buffer = this._buffer;
var index = this._index;
if (index >= buffer.length)
return finalResult;
this._index++;
return resultCache[buffer[index]];
};
BufferIterator.prototype[Symbol.iterator] = function() {
return this;
};
BufferValueIterator.prototype[Symbol.iterator] =
BufferIterator.prototype[Symbol.iterator];
Buffer.prototype.keys = function() {
return new BufferIterator(this, ITERATOR_KIND_KEYS);
};
Buffer.prototype.entries = function() {
return new BufferIterator(this, ITERATOR_KIND_ENTRIES);
};
Buffer.prototype.values = function() {
return new BufferValueIterator(this);
};
Buffer.prototype[Symbol.iterator] = Buffer.prototype.values;