'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}`

});

});

});