/* eslint-disable require-buffer */ 'use strict'; const binding = process.binding('buffer'); const { isArrayBuffer, isSharedArrayBuffer } = process.binding('util'); const bindingObj = {}; const internalUtil = require('internal/util'); class FastBuffer extends Uint8Array { constructor(arg1, arg2, arg3) { super(arg1, arg2, arg3); } } 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 { return new ArrayBuffer(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 (isArrayBuffer(value) || isSharedArrayBuffer(value)) 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. 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) { 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 ('length' in obj || isArrayBuffer(obj.buffer) || isSharedArrayBuffer(obj.buffer)) { 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; } // Note: `length` is always equal to `buffer.length` at this point if (pos < length) { // Zero-fill the remaining bytes if the specified `length` was more than // the actual total length, i.e. if we have some remaining allocated bytes // there were not initialized. buffer.fill(0, pos, 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) || isArrayBuffer(string) || isSharedArrayBuffer(string)) { return string.byteLength; } throw new TypeError('"string" must be a string, Buffer, or ArrayBuffer'); } 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; 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.customInspectSymbol] = 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.customInspectSymbol]; 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.length; 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) { // Use Math.trunc() to convert offset to an integer value that can be larger // than an Int32. Hence, don't use offset | 0 or similar techniques. offset = Math.trunc(offset); if (offset === 0 || Number.isNaN(offset)) { return 0; } else 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; // Put this at the end because internal/buffer has a circular // dependency on Buffer. exports.transcode = require('internal/buffer').transcode;