Press n or j to go to the next uncovered block, b, p or k for the previous block.
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const {
BigInt,
Float32Array,
Float64Array,
MathFloor,
Number,
Uint8Array,
} = primordials;
const {
ERR_BUFFER_OUT_OF_BOUNDS,
ERR_INVALID_ARG_TYPE,
ERR_OUT_OF_RANGE
} = require('internal/errors').codes;
const { validateNumber } = require('internal/validators');
const {
asciiSlice,
base64Slice,
base64urlSlice,
latin1Slice,
hexSlice,
ucs2Slice,
utf8Slice,
asciiWrite,
base64Write,
base64urlWrite,
latin1Write,
hexWrite,
ucs2Write,
utf8Write,
getZeroFillToggle
} = internalBinding('buffer');
const {
untransferable_object_private_symbol,
setHiddenValue,
} = internalBinding('util');
// Temporary buffers to convert numbers.
const float32Array = new Float32Array(1);
const uInt8Float32Array = new Uint8Array(float32Array.buffer);
const float64Array = new Float64Array(1);
const uInt8Float64Array = new Uint8Array(float64Array.buffer);
// Check endianness.
float32Array[0] = -1; // 0xBF800000
// Either it is [0, 0, 128, 191] or [191, 128, 0, 0]. It is not possible to
// check this with `os.endianness()` because that is determined at compile time.
const bigEndian = uInt8Float32Array[3] === 0;
function checkBounds(buf, offset, byteLength) {
validateNumber(offset, 'offset');
if (buf[offset] === undefined || buf[offset + byteLength] === undefined)
boundsError(offset, buf.length - (byteLength + 1));
}
function checkInt(value, min, max, buf, offset, byteLength) {
if (value > max || value < min) {
const n = typeof min === 'bigint' ? 'n' : '';
let range;
if (byteLength > 3) {
if (min === 0 || min === 0n) {
range = `>= 0${n} and < 2${n} ** ${(byteLength + 1) * 8}${n}`;
} else {
range = `>= -(2${n} ** ${(byteLength + 1) * 8 - 1}${n}) and ` +
`< 2${n} ** ${(byteLength + 1) * 8 - 1}${n}`;
}
} else {
range = `>= ${min}${n} and <= ${max}${n}`;
}
throw new ERR_OUT_OF_RANGE('value', range, value);
}
checkBounds(buf, offset, byteLength);
}
function boundsError(value, length, type) {
if (MathFloor(value) !== value) {
validateNumber(value, type);
throw new ERR_OUT_OF_RANGE(type || 'offset', 'an integer', value);
}
if (length < 0)
throw new ERR_BUFFER_OUT_OF_BOUNDS();
throw new ERR_OUT_OF_RANGE(type || 'offset',
`>= ${type ? 1 : 0} and <= ${length}`,
value);
}
// Read integers.
function readBigUInt64LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
const lo = first +
this[++offset] * 2 ** 8 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 24;
const hi = this[++offset] +
this[++offset] * 2 ** 8 +
this[++offset] * 2 ** 16 +
last * 2 ** 24;
return BigInt(lo) + (BigInt(hi) << 32n);
}
function readBigUInt64BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
const hi = first * 2 ** 24 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
this[++offset];
const lo = this[++offset] * 2 ** 24 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
last;
return (BigInt(hi) << 32n) + BigInt(lo);
}
function readBigInt64LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
const val = this[offset + 4] +
this[offset + 5] * 2 ** 8 +
this[offset + 6] * 2 ** 16 +
(last << 24); // Overflow
return (BigInt(val) << 32n) +
BigInt(first +
this[++offset] * 2 ** 8 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 24);
}
function readBigInt64BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
const val = (first << 24) + // Overflow
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
this[++offset];
return (BigInt(val) << 32n) +
BigInt(this[++offset] * 2 ** 24 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
last);
}
function readUIntLE(offset, byteLength) {
if (offset === undefined)
throw new ERR_INVALID_ARG_TYPE('offset', 'number', offset);
if (byteLength === 6)
return readUInt48LE(this, offset);
if (byteLength === 5)
return readUInt40LE(this, offset);
if (byteLength === 3)
return readUInt24LE(this, offset);
if (byteLength === 4)
return this.readUInt32LE(offset);
if (byteLength === 2)
return this.readUInt16LE(offset);
if (byteLength === 1)
return this.readUInt8(offset);
boundsError(byteLength, 6, 'byteLength');
}
function readUInt48LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 5];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 6);
return first +
buf[++offset] * 2 ** 8 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 24 +
(buf[++offset] + last * 2 ** 8) * 2 ** 32;
}
function readUInt40LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 4];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 5);
return first +
buf[++offset] * 2 ** 8 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 24 +
last * 2 ** 32;
}
function readUInt32LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
return first +
this[++offset] * 2 ** 8 +
this[++offset] * 2 ** 16 +
last * 2 ** 24;
}
function readUInt24LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 2];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 3);
return first + buf[++offset] * 2 ** 8 + last * 2 ** 16;
}
function readUInt16LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 1];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 2);
return first + last * 2 ** 8;
}
function readUInt8(offset = 0) {
validateNumber(offset, 'offset');
const val = this[offset];
if (val === undefined)
boundsError(offset, this.length - 1);
return val;
}
function readUIntBE(offset, byteLength) {
if (offset === undefined)
throw new ERR_INVALID_ARG_TYPE('offset', 'number', offset);
if (byteLength === 6)
return readUInt48BE(this, offset);
if (byteLength === 5)
return readUInt40BE(this, offset);
if (byteLength === 3)
return readUInt24BE(this, offset);
if (byteLength === 4)
return this.readUInt32BE(offset);
if (byteLength === 2)
return this.readUInt16BE(offset);
if (byteLength === 1)
return this.readUInt8(offset);
boundsError(byteLength, 6, 'byteLength');
}
function readUInt48BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 5];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 6);
return (first * 2 ** 8 + buf[++offset]) * 2 ** 32 +
buf[++offset] * 2 ** 24 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 8 +
last;
}
function readUInt40BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 4];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 5);
return first * 2 ** 32 +
buf[++offset] * 2 ** 24 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 8 +
last;
}
function readUInt32BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
return first * 2 ** 24 +
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
last;
}
function readUInt24BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 2];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 3);
return first * 2 ** 16 + buf[++offset] * 2 ** 8 + last;
}
function readUInt16BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 1];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 2);
return first * 2 ** 8 + last;
}
function readIntLE(offset, byteLength) {
if (offset === undefined)
throw new ERR_INVALID_ARG_TYPE('offset', 'number', offset);
if (byteLength === 6)
return readInt48LE(this, offset);
if (byteLength === 5)
return readInt40LE(this, offset);
if (byteLength === 3)
return readInt24LE(this, offset);
if (byteLength === 4)
return this.readInt32LE(offset);
if (byteLength === 2)
return this.readInt16LE(offset);
if (byteLength === 1)
return this.readInt8(offset);
boundsError(byteLength, 6, 'byteLength');
}
function readInt48LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 5];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 6);
const val = buf[offset + 4] + last * 2 ** 8;
return (val | (val & 2 ** 15) * 0x1fffe) * 2 ** 32 +
first +
buf[++offset] * 2 ** 8 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 24;
}
function readInt40LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 4];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 5);
return (last | (last & 2 ** 7) * 0x1fffffe) * 2 ** 32 +
first +
buf[++offset] * 2 ** 8 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 24;
}
function readInt32LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
return first +
this[++offset] * 2 ** 8 +
this[++offset] * 2 ** 16 +
(last << 24); // Overflow
}
function readInt24LE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 2];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 3);
const val = first + buf[++offset] * 2 ** 8 + last * 2 ** 16;
return val | (val & 2 ** 23) * 0x1fe;
}
function readInt16LE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 1];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 2);
const val = first + last * 2 ** 8;
return val | (val & 2 ** 15) * 0x1fffe;
}
function readInt8(offset = 0) {
validateNumber(offset, 'offset');
const val = this[offset];
if (val === undefined)
boundsError(offset, this.length - 1);
return val | (val & 2 ** 7) * 0x1fffffe;
}
function readIntBE(offset, byteLength) {
if (offset === undefined)
throw new ERR_INVALID_ARG_TYPE('offset', 'number', offset);
if (byteLength === 6)
return readInt48BE(this, offset);
if (byteLength === 5)
return readInt40BE(this, offset);
if (byteLength === 3)
return readInt24BE(this, offset);
if (byteLength === 4)
return this.readInt32BE(offset);
if (byteLength === 2)
return this.readInt16BE(offset);
if (byteLength === 1)
return this.readInt8(offset);
boundsError(byteLength, 6, 'byteLength');
}
function readInt48BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 5];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 6);
const val = buf[++offset] + first * 2 ** 8;
return (val | (val & 2 ** 15) * 0x1fffe) * 2 ** 32 +
buf[++offset] * 2 ** 24 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 8 +
last;
}
function readInt40BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 4];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 5);
return (first | (first & 2 ** 7) * 0x1fffffe) * 2 ** 32 +
buf[++offset] * 2 ** 24 +
buf[++offset] * 2 ** 16 +
buf[++offset] * 2 ** 8 +
last;
}
function readInt32BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
return (first << 24) + // Overflow
this[++offset] * 2 ** 16 +
this[++offset] * 2 ** 8 +
last;
}
function readInt24BE(buf, offset = 0) {
validateNumber(offset, 'offset');
const first = buf[offset];
const last = buf[offset + 2];
if (first === undefined || last === undefined)
boundsError(offset, buf.length - 3);
const val = first * 2 ** 16 + buf[++offset] * 2 ** 8 + last;
return val | (val & 2 ** 23) * 0x1fe;
}
function readInt16BE(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 1];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 2);
const val = first * 2 ** 8 + last;
return val | (val & 2 ** 15) * 0x1fffe;
}
// Read floats
function readFloatBackwards(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
uInt8Float32Array[3] = first;
uInt8Float32Array[2] = this[++offset];
uInt8Float32Array[1] = this[++offset];
uInt8Float32Array[0] = last;
return float32Array[0];
}
function readFloatForwards(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 3];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 4);
uInt8Float32Array[0] = first;
uInt8Float32Array[1] = this[++offset];
uInt8Float32Array[2] = this[++offset];
uInt8Float32Array[3] = last;
return float32Array[0];
}
function readDoubleBackwards(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
uInt8Float64Array[7] = first;
uInt8Float64Array[6] = this[++offset];
uInt8Float64Array[5] = this[++offset];
uInt8Float64Array[4] = this[++offset];
uInt8Float64Array[3] = this[++offset];
uInt8Float64Array[2] = this[++offset];
uInt8Float64Array[1] = this[++offset];
uInt8Float64Array[0] = last;
return float64Array[0];
}
function readDoubleForwards(offset = 0) {
validateNumber(offset, 'offset');
const first = this[offset];
const last = this[offset + 7];
if (first === undefined || last === undefined)
boundsError(offset, this.length - 8);
uInt8Float64Array[0] = first;
uInt8Float64Array[1] = this[++offset];
uInt8Float64Array[2] = this[++offset];
uInt8Float64Array[3] = this[++offset];
uInt8Float64Array[4] = this[++offset];
uInt8Float64Array[5] = this[++offset];
uInt8Float64Array[6] = this[++offset];
uInt8Float64Array[7] = last;
return float64Array[0];
}
// Write integers.
function writeBigU_Int64LE(buf, value, offset, min, max) {
checkInt(value, min, max, buf, offset, 7);
let lo = Number(value & 0xffffffffn);
buf[offset++] = lo;
lo = lo >> 8;
buf[offset++] = lo;
lo = lo >> 8;
buf[offset++] = lo;
lo = lo >> 8;
buf[offset++] = lo;
let hi = Number(value >> 32n & 0xffffffffn);
buf[offset++] = hi;
hi = hi >> 8;
buf[offset++] = hi;
hi = hi >> 8;
buf[offset++] = hi;
hi = hi >> 8;
buf[offset++] = hi;
return offset;
}
function writeBigUInt64LE(value, offset = 0) {
return writeBigU_Int64LE(this, value, offset, 0n, 0xffffffffffffffffn);
}
function writeBigU_Int64BE(buf, value, offset, min, max) {
checkInt(value, min, max, buf, offset, 7);
let lo = Number(value & 0xffffffffn);
buf[offset + 7] = lo;
lo = lo >> 8;
buf[offset + 6] = lo;
lo = lo >> 8;
buf[offset + 5] = lo;
lo = lo >> 8;
buf[offset + 4] = lo;
let hi = Number(value >> 32n & 0xffffffffn);
buf[offset + 3] = hi;
hi = hi >> 8;
buf[offset + 2] = hi;
hi = hi >> 8;
buf[offset + 1] = hi;
hi = hi >> 8;
buf[offset] = hi;
return offset + 8;
}
function writeBigUInt64BE(value, offset = 0) {
return writeBigU_Int64BE(this, value, offset, 0n, 0xffffffffffffffffn);
}
function writeBigInt64LE(value, offset = 0) {
return writeBigU_Int64LE(
this, value, offset, -0x8000000000000000n, 0x7fffffffffffffffn);
}
function writeBigInt64BE(value, offset = 0) {
return writeBigU_Int64BE(
this, value, offset, -0x8000000000000000n, 0x7fffffffffffffffn);
}
function writeUIntLE(value, offset, byteLength) {
if (byteLength === 6)
return writeU_Int48LE(this, value, offset, 0, 0xffffffffffff);
if (byteLength === 5)
return writeU_Int40LE(this, value, offset, 0, 0xffffffffff);
if (byteLength === 3)
return writeU_Int24LE(this, value, offset, 0, 0xffffff);
if (byteLength === 4)
return writeU_Int32LE(this, value, offset, 0, 0xffffffff);
if (byteLength === 2)
return writeU_Int16LE(this, value, offset, 0, 0xffff);
if (byteLength === 1)
return writeU_Int8(this, value, offset, 0, 0xff);
boundsError(byteLength, 6, 'byteLength');
}
function writeU_Int48LE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 5);
const newVal = MathFloor(value * 2 ** -32);
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
buf[offset++] = newVal;
buf[offset++] = (newVal >>> 8);
return offset;
}
function writeU_Int40LE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 4);
const newVal = value;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
buf[offset++] = MathFloor(newVal * 2 ** -32);
return offset;
}
function writeU_Int32LE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 3);
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
return offset;
}
function writeUInt32LE(value, offset = 0) {
return writeU_Int32LE(this, value, offset, 0, 0xffffffff);
}
function writeU_Int24LE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 2);
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
value = value >>> 8;
buf[offset++] = value;
return offset;
}
function writeU_Int16LE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 1);
buf[offset++] = value;
buf[offset++] = (value >>> 8);
return offset;
}
function writeUInt16LE(value, offset = 0) {
return writeU_Int16LE(this, value, offset, 0, 0xffff);
}
function writeU_Int8(buf, value, offset, min, max) {
value = +value;
// `checkInt()` can not be used here because it checks two entries.
validateNumber(offset, 'offset');
if (value > max || value < min) {
throw new ERR_OUT_OF_RANGE('value', `>= ${min} and <= ${max}`, value);
}
if (buf[offset] === undefined)
boundsError(offset, buf.length - 1);
buf[offset] = value;
return offset + 1;
}
function writeUInt8(value, offset = 0) {
return writeU_Int8(this, value, offset, 0, 0xff);
}
function writeUIntBE(value, offset, byteLength) {
if (byteLength === 6)
return writeU_Int48BE(this, value, offset, 0, 0xffffffffffff);
if (byteLength === 5)
return writeU_Int40BE(this, value, offset, 0, 0xffffffffff);
if (byteLength === 3)
return writeU_Int24BE(this, value, offset, 0, 0xffffff);
if (byteLength === 4)
return writeU_Int32BE(this, value, offset, 0, 0xffffffff);
if (byteLength === 2)
return writeU_Int16BE(this, value, offset, 0, 0xffff);
if (byteLength === 1)
return writeU_Int8(this, value, offset, 0, 0xff);
boundsError(byteLength, 6, 'byteLength');
}
function writeU_Int48BE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 5);
const newVal = MathFloor(value * 2 ** -32);
buf[offset++] = (newVal >>> 8);
buf[offset++] = newVal;
buf[offset + 3] = value;
value = value >>> 8;
buf[offset + 2] = value;
value = value >>> 8;
buf[offset + 1] = value;
value = value >>> 8;
buf[offset] = value;
return offset + 4;
}
function writeU_Int40BE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 4);
buf[offset++] = MathFloor(value * 2 ** -32);
buf[offset + 3] = value;
value = value >>> 8;
buf[offset + 2] = value;
value = value >>> 8;
buf[offset + 1] = value;
value = value >>> 8;
buf[offset] = value;
return offset + 4;
}
function writeU_Int32BE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 3);
buf[offset + 3] = value;
value = value >>> 8;
buf[offset + 2] = value;
value = value >>> 8;
buf[offset + 1] = value;
value = value >>> 8;
buf[offset] = value;
return offset + 4;
}
function writeUInt32BE(value, offset = 0) {
return writeU_Int32BE(this, value, offset, 0, 0xffffffff);
}
function writeU_Int24BE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 2);
buf[offset + 2] = value;
value = value >>> 8;
buf[offset + 1] = value;
value = value >>> 8;
buf[offset] = value;
return offset + 3;
}
function writeU_Int16BE(buf, value, offset, min, max) {
value = +value;
checkInt(value, min, max, buf, offset, 1);
buf[offset++] = (value >>> 8);
buf[offset++] = value;
return offset;
}
function writeUInt16BE(value, offset = 0) {
return writeU_Int16BE(this, value, offset, 0, 0xffff);
}
function writeIntLE(value, offset, byteLength) {
if (byteLength === 6)
return writeU_Int48LE(this, value, offset, -0x800000000000, 0x7fffffffffff);
if (byteLength === 5)
return writeU_Int40LE(this, value, offset, -0x8000000000, 0x7fffffffff);
if (byteLength === 3)
return writeU_Int24LE(this, value, offset, -0x800000, 0x7fffff);
if (byteLength === 4)
return writeU_Int32LE(this, value, offset, -0x80000000, 0x7fffffff);
if (byteLength === 2)
return writeU_Int16LE(this, value, offset, -0x8000, 0x7fff);
if (byteLength === 1)
return writeU_Int8(this, value, offset, -0x80, 0x7f);
boundsError(byteLength, 6, 'byteLength');
}
function writeInt32LE(value, offset = 0) {
return writeU_Int32LE(this, value, offset, -0x80000000, 0x7fffffff);
}
function writeInt16LE(value, offset = 0) {
return writeU_Int16LE(this, value, offset, -0x8000, 0x7fff);
}
function writeInt8(value, offset = 0) {
return writeU_Int8(this, value, offset, -0x80, 0x7f);
}
function writeIntBE(value, offset, byteLength) {
if (byteLength === 6)
return writeU_Int48BE(this, value, offset, -0x800000000000, 0x7fffffffffff);
if (byteLength === 5)
return writeU_Int40BE(this, value, offset, -0x8000000000, 0x7fffffffff);
if (byteLength === 3)
return writeU_Int24BE(this, value, offset, -0x800000, 0x7fffff);
if (byteLength === 4)
return writeU_Int32BE(this, value, offset, -0x80000000, 0x7fffffff);
if (byteLength === 2)
return writeU_Int16BE(this, value, offset, -0x8000, 0x7fff);
if (byteLength === 1)
return writeU_Int8(this, value, offset, -0x80, 0x7f);
boundsError(byteLength, 6, 'byteLength');
}
function writeInt32BE(value, offset = 0) {
return writeU_Int32BE(this, value, offset, -0x80000000, 0x7fffffff);
}
function writeInt16BE(value, offset = 0) {
return writeU_Int16BE(this, value, offset, -0x8000, 0x7fff);
}
// Write floats.
function writeDoubleForwards(val, offset = 0) {
val = +val;
checkBounds(this, offset, 7);
float64Array[0] = val;
this[offset++] = uInt8Float64Array[0];
this[offset++] = uInt8Float64Array[1];
this[offset++] = uInt8Float64Array[2];
this[offset++] = uInt8Float64Array[3];
this[offset++] = uInt8Float64Array[4];
this[offset++] = uInt8Float64Array[5];
this[offset++] = uInt8Float64Array[6];
this[offset++] = uInt8Float64Array[7];
return offset;
}
function writeDoubleBackwards(val, offset = 0) {
val = +val;
checkBounds(this, offset, 7);
float64Array[0] = val;
this[offset++] = uInt8Float64Array[7];
this[offset++] = uInt8Float64Array[6];
this[offset++] = uInt8Float64Array[5];
this[offset++] = uInt8Float64Array[4];
this[offset++] = uInt8Float64Array[3];
this[offset++] = uInt8Float64Array[2];
this[offset++] = uInt8Float64Array[1];
this[offset++] = uInt8Float64Array[0];
return offset;
}
function writeFloatForwards(val, offset = 0) {
val = +val;
checkBounds(this, offset, 3);
float32Array[0] = val;
this[offset++] = uInt8Float32Array[0];
this[offset++] = uInt8Float32Array[1];
this[offset++] = uInt8Float32Array[2];
this[offset++] = uInt8Float32Array[3];
return offset;
}
function writeFloatBackwards(val, offset = 0) {
val = +val;
checkBounds(this, offset, 3);
float32Array[0] = val;
this[offset++] = uInt8Float32Array[3];
this[offset++] = uInt8Float32Array[2];
this[offset++] = uInt8Float32Array[1];
this[offset++] = uInt8Float32Array[0];
return offset;
}
class FastBuffer extends Uint8Array {
// Using an explicit constructor here is necessary to avoid relying on
// `Array.prototype[Symbol.iterator]`, which can be mutated by users.
// eslint-disable-next-line no-useless-constructor
constructor(bufferOrLength, byteOffset, length) {
super(bufferOrLength, byteOffset, length);
}
}
function addBufferPrototypeMethods(proto) {
proto.readBigUInt64LE = readBigUInt64LE;
proto.readBigUInt64BE = readBigUInt64BE;
proto.readBigUint64LE = readBigUInt64LE;
proto.readBigUint64BE = readBigUInt64BE;
proto.readBigInt64LE = readBigInt64LE;
proto.readBigInt64BE = readBigInt64BE;
proto.writeBigUInt64LE = writeBigUInt64LE;
proto.writeBigUInt64BE = writeBigUInt64BE;
proto.writeBigUint64LE = writeBigUInt64LE;
proto.writeBigUint64BE = writeBigUInt64BE;
proto.writeBigInt64LE = writeBigInt64LE;
proto.writeBigInt64BE = writeBigInt64BE;
proto.readUIntLE = readUIntLE;
proto.readUInt32LE = readUInt32LE;
proto.readUInt16LE = readUInt16LE;
proto.readUInt8 = readUInt8;
proto.readUIntBE = readUIntBE;
proto.readUInt32BE = readUInt32BE;
proto.readUInt16BE = readUInt16BE;
proto.readUintLE = readUIntLE;
proto.readUint32LE = readUInt32LE;
proto.readUint16LE = readUInt16LE;
proto.readUint8 = readUInt8;
proto.readUintBE = readUIntBE;
proto.readUint32BE = readUInt32BE;
proto.readUint16BE = readUInt16BE;
proto.readIntLE = readIntLE;
proto.readInt32LE = readInt32LE;
proto.readInt16LE = readInt16LE;
proto.readInt8 = readInt8;
proto.readIntBE = readIntBE;
proto.readInt32BE = readInt32BE;
proto.readInt16BE = readInt16BE;
proto.writeUIntLE = writeUIntLE;
proto.writeUInt32LE = writeUInt32LE;
proto.writeUInt16LE = writeUInt16LE;
proto.writeUInt8 = writeUInt8;
proto.writeUIntBE = writeUIntBE;
proto.writeUInt32BE = writeUInt32BE;
proto.writeUInt16BE = writeUInt16BE;
proto.writeUintLE = writeUIntLE;
proto.writeUint32LE = writeUInt32LE;
proto.writeUint16LE = writeUInt16LE;
proto.writeUint8 = writeUInt8;
proto.writeUintBE = writeUIntBE;
proto.writeUint32BE = writeUInt32BE;
proto.writeUint16BE = writeUInt16BE;
proto.writeIntLE = writeIntLE;
proto.writeInt32LE = writeInt32LE;
proto.writeInt16LE = writeInt16LE;
proto.writeInt8 = writeInt8;
proto.writeIntBE = writeIntBE;
proto.writeInt32BE = writeInt32BE;
proto.writeInt16BE = writeInt16BE;
proto.readFloatLE = bigEndian ? readFloatBackwards : readFloatForwards;
proto.readFloatBE = bigEndian ? readFloatForwards : readFloatBackwards;
proto.readDoubleLE = bigEndian ? readDoubleBackwards : readDoubleForwards;
proto.readDoubleBE = bigEndian ? readDoubleForwards : readDoubleBackwards;
proto.writeFloatLE = bigEndian ? writeFloatBackwards : writeFloatForwards;
proto.writeFloatBE = bigEndian ? writeFloatForwards : writeFloatBackwards;
proto.writeDoubleLE = bigEndian ? writeDoubleBackwards : writeDoubleForwards;
proto.writeDoubleBE = bigEndian ? writeDoubleForwards : writeDoubleBackwards;
proto.asciiSlice = asciiSlice;
proto.base64Slice = base64Slice;
proto.base64urlSlice = base64urlSlice;
proto.latin1Slice = latin1Slice;
proto.hexSlice = hexSlice;
proto.ucs2Slice = ucs2Slice;
proto.utf8Slice = utf8Slice;
proto.asciiWrite = asciiWrite;
proto.base64Write = base64Write;
proto.base64urlWrite = base64urlWrite;
proto.latin1Write = latin1Write;
proto.hexWrite = hexWrite;
proto.ucs2Write = ucs2Write;
proto.utf8Write = utf8Write;
}
// This would better be placed in internal/worker/io.js, but that doesn't work
// because Buffer needs this and that would introduce a cyclic dependency.
function markAsUntransferable(obj) {
if ((typeof obj !== 'object' && typeof obj !== 'function') || obj === null)
return; // This object is a primitive and therefore already untransferable.
setHiddenValue(obj, untransferable_object_private_symbol, true);
}
// A toggle used to access the zero fill setting of the array buffer allocator
// in C++.
// |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.
let zeroFill = getZeroFillToggle();
function createUnsafeBuffer(size) {
zeroFill[0] = 0;
try {
return new FastBuffer(size);
} finally {
zeroFill[0] = 1;
}
}
// The connection between the JS land zero fill toggle and the
// C++ one in the NodeArrayBufferAllocator gets lost if the toggle
// is deserialized from the snapshot, because V8 owns the underlying
// memory of this toggle. This resets the connection.
function reconnectZeroFillToggle() {
zeroFill = getZeroFillToggle();
}
module.exports = {
FastBuffer,
addBufferPrototypeMethods,
markAsUntransferable,
createUnsafeBuffer,
readUInt16BE,
readUInt32BE,
reconnectZeroFillToggle
};
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