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'use strict';
const common = require('../common');
const assert = require('assert');
// testing basic buffer read functions
const buf = Buffer.from([0xa4, 0xfd, 0x48, 0xea, 0xcf, 0xff, 0xd9, 0x01, 0xde]);
function read(buff, funx, args, expected) {
assert.strictEqual(buff[funx](...args), expected);
common.expectsError(
() => buff[funx](-1, args[1]),
{ code: 'ERR_OUT_OF_RANGE' }
);
}
// testing basic functionality of readDoubleBE() and readDoubleLE()
read(buf, 'readDoubleBE', [1], -3.1827727774563287e+295);
read(buf, 'readDoubleLE', [1], -6.966010051009108e+144);
// testing basic functionality of readFloatBE() and readFloatLE()
read(buf, 'readFloatBE', [1], -1.6691549692541768e+37);
read(buf, 'readFloatLE', [1], -7861303808);
// testing basic functionality of readInt8()
read(buf, 'readInt8', [1], -3);
// testing basic functionality of readInt16BE() and readInt16LE()
read(buf, 'readInt16BE', [1], -696);
read(buf, 'readInt16LE', [1], 0x48fd);
// testing basic functionality of readInt32BE() and readInt32LE()
read(buf, 'readInt32BE', [1], -45552945);
read(buf, 'readInt32LE', [1], -806729475);
// testing basic functionality of readIntBE() and readIntLE()
read(buf, 'readIntBE', [1, 1], -3);
read(buf, 'readIntLE', [2, 1], 0x48);
// testing basic functionality of readUInt8()
read(buf, 'readUInt8', [1], 0xfd);
// testing basic functionality of readUInt16BE() and readUInt16LE()
read(buf, 'readUInt16BE', [2], 0x48ea);
read(buf, 'readUInt16LE', [2], 0xea48);
// testing basic functionality of readUInt32BE() and readUInt32LE()
read(buf, 'readUInt32BE', [1], 0xfd48eacf);
read(buf, 'readUInt32LE', [1], 0xcfea48fd);
// testing basic functionality of readUIntBE() and readUIntLE()
read(buf, 'readUIntBE', [2, 2], 0x48ea);
read(buf, 'readUIntLE', [2, 2], 0xea48);
// invalid byteLength parameter for readUIntBE() and readUIntLE()
common.expectsError(() => { buf.readUIntBE(2, 0); },
{ code: 'ERR_OUT_OF_RANGE' });
common.expectsError(() => { buf.readUIntLE(2, 7); },
{ code: 'ERR_OUT_OF_RANGE' });
// attempt to overflow buffers, similar to previous bug in array buffers
assert.throws(() => Buffer.allocUnsafe(8).readFloatBE(0xffffffff),
RangeError);
assert.throws(() => Buffer.allocUnsafe(8).readFloatLE(0xffffffff),
RangeError);
// ensure negative values can't get past offset
assert.throws(() => Buffer.allocUnsafe(8).readFloatBE(-1), RangeError);
assert.throws(() => Buffer.allocUnsafe(8).readFloatLE(-1), RangeError);
// offset checks
{
const buf = Buffer.allocUnsafe(0);
assert.throws(() => buf.readUInt8(0), RangeError);
assert.throws(() => buf.readInt8(0), RangeError);
}
{
const buf = Buffer.from([0xFF]);
assert.strictEqual(buf.readUInt8(0), 255);
assert.strictEqual(buf.readInt8(0), -1);
}
[16, 32].forEach((bits) => {
const buf = Buffer.allocUnsafe(bits / 8 - 1);
assert.throws(() => buf[`readUInt${bits}BE`](0),
RangeError,
`readUInt${bits}BE()`);
assert.throws(() => buf[`readUInt${bits}LE`](0),
RangeError,
`readUInt${bits}LE()`);
assert.throws(() => buf[`readInt${bits}BE`](0),
RangeError,
`readInt${bits}BE()`);
assert.throws(() => buf[`readInt${bits}LE`](0),
RangeError,
`readInt${bits}LE()`);
});
[16, 32].forEach((bits) => {
const buf = Buffer.from([0xFF, 0xFF, 0xFF, 0xFF]);
assert.strictEqual(buf[`readUInt${bits}BE`](0),
(0xFFFFFFFF >>> (32 - bits)));
assert.strictEqual(buf[`readUInt${bits}LE`](0),
(0xFFFFFFFF >>> (32 - bits)));
assert.strictEqual(buf[`readInt${bits}BE`](0),
(0xFFFFFFFF >> (32 - bits)));
assert.strictEqual(buf[`readInt${bits}LE`](0),
(0xFFFFFFFF >> (32 - bits)));
});
// Test for common read(U)IntLE/BE
{
const buf = Buffer.from([0x01, 0x02, 0x03, 0x04, 0x05, 0x06]);
assert.strictEqual(buf.readUIntLE(0, 1), 0x01);
assert.strictEqual(buf.readUIntBE(0, 1), 0x01);
assert.strictEqual(buf.readUIntLE(0, 3), 0x030201);
assert.strictEqual(buf.readUIntBE(0, 3), 0x010203);
assert.strictEqual(buf.readUIntLE(0, 5), 0x0504030201);
assert.strictEqual(buf.readUIntBE(0, 5), 0x0102030405);
assert.strictEqual(buf.readUIntLE(0, 6), 0x060504030201);
assert.strictEqual(buf.readUIntBE(0, 6), 0x010203040506);
assert.strictEqual(buf.readIntLE(0, 1), 0x01);
assert.strictEqual(buf.readIntBE(0, 1), 0x01);
assert.strictEqual(buf.readIntLE(0, 3), 0x030201);
assert.strictEqual(buf.readIntBE(0, 3), 0x010203);
assert.strictEqual(buf.readIntLE(0, 5), 0x0504030201);
assert.strictEqual(buf.readIntBE(0, 5), 0x0102030405);
assert.strictEqual(buf.readIntLE(0, 6), 0x060504030201);
assert.strictEqual(buf.readIntBE(0, 6), 0x010203040506);
}
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