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'use strict';
require('../common');
const assert = require('assert');
// Test 32 bit float
const buffer = Buffer.alloc(4);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0x3f;
assert.strictEqual(buffer.readFloatBE(0), 4.600602988224807e-41);
assert.strictEqual(buffer.readFloatLE(0), 1);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0xc0;
assert.strictEqual(buffer.readFloatBE(0), 2.6904930515036488e-43);
assert.strictEqual(buffer.readFloatLE(0), -2);
buffer[0] = 0xff;
buffer[1] = 0xff;
buffer[2] = 0x7f;
buffer[3] = 0x7f;
assert.ok(Number.isNaN(buffer.readFloatBE(0)));
assert.strictEqual(buffer.readFloatLE(0), 3.4028234663852886e+38);
buffer[0] = 0xab;
buffer[1] = 0xaa;
buffer[2] = 0xaa;
buffer[3] = 0x3e;
assert.strictEqual(buffer.readFloatBE(0), -1.2126478207002966e-12);
assert.strictEqual(buffer.readFloatLE(0), 0.3333333432674408);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0;
buffer[3] = 0;
assert.strictEqual(buffer.readFloatBE(0), 0);
assert.strictEqual(buffer.readFloatLE(0), 0);
assert.ok(1 / buffer.readFloatLE(0) >= 0);
buffer[3] = 0x80;
assert.strictEqual(buffer.readFloatBE(0), 1.793662034335766e-43);
assert.strictEqual(buffer.readFloatLE(0), -0);
assert.ok(1 / buffer.readFloatLE(0) < 0);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0x7f;
assert.strictEqual(buffer.readFloatBE(0), 4.609571298396486e-41);
assert.strictEqual(buffer.readFloatLE(0), Infinity);
buffer[0] = 0;
buffer[1] = 0;
buffer[2] = 0x80;
buffer[3] = 0xff;
assert.strictEqual(buffer.readFloatBE(0), 4.627507918739843e-41);
assert.strictEqual(buffer.readFloatLE(0), -Infinity);
['readFloatLE', 'readFloatBE'].forEach((fn) => {
// Verify that default offset works fine.
buffer[fn](undefined);
buffer[fn]();
['', '0', null, {}, [], () => {}, true, false].forEach((off) => {
assert.throws(
() => buffer[fn](off),
{ code: 'ERR_INVALID_ARG_TYPE' }
);
});
[Infinity, -1, 1].forEach((offset) => {
assert.throws(
() => buffer[fn](offset),
{
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be >= 0 and <= 0. Received ${offset}`
});
});
assert.throws(
() => Buffer.alloc(1)[fn](1),
{
code: 'ERR_BUFFER_OUT_OF_BOUNDS',
name: 'RangeError',
message: 'Attempt to access memory outside buffer bounds'
});
[NaN, 1.01].forEach((offset) => {
assert.throws(
() => buffer[fn](offset),
{
code: 'ERR_OUT_OF_RANGE',
name: 'RangeError',
message: 'The value of "offset" is out of range. ' +
`It must be an integer. Received ${offset}`
});
});
});