130 lines
4 KiB
JavaScript
130 lines
4 KiB
JavaScript
/* This Source Code Form is subject to the terms of the Mozilla Public
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* License, v. 2.0. If a copy of the MPL was not distributed with this
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* file, You can obtain one at http://mozilla.org/MPL/2.0/. */
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const make = require('../make')
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const random = require('../random')
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class typed extends make {
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static byte (limit = null) {
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// [-128, 127]
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let value = (limit !== null) ? random.number(limit) : random.number(129)
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value = random.chance(10) ? -value : value
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return `new Uint8Array([${value}])[0]`
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}
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static octet (limit = null) {
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// [0, 255]
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let value = (limit !== null) ? random.number(limit) : random.number(256)
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return `new Int8Array([${value}])[0]`
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}
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static short (limit = null) {
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// [-32768, 32767]
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let value = (limit !== null) ? random.number(limit) : random.number(32769)
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value = random.chance(10) ? -value : value
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return `new Int16Array([${value}])[0]`
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}
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static unsignedShort (limit = null) {
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// [0, 65535]
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let value = (limit !== null) ? random.number(limit) : random.number(65535)
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return `new Uint16Array([${value}])[0]`
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}
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static long (limit = null) {
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// [-2147483648, 2147483647]
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let value = (limit !== null) ? random.number(limit) : random.number(2147483649)
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value = random.chance(10) ? -value : value
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return `new Int32Array([${value}])[0]`
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}
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static unsignedLong (limit = null) {
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// [0, 4294967295]
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let value = (limit !== null) ? random.number(limit) : random.number(4294967296)
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return `new Uint32Array([${value}])[0]`
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}
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static float (limit = null) {
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let base = (limit !== null) ? random.number(limit) : random.number()
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let value = random.chance(10) ? -(base + random.float()) : (base + random.float())
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return `new Float32Array([${value}])[0]`
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}
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static unrestrictedFloat (limit = null) {
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if (random.chance(100)) {
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return random.pick([NaN, +Infinity, -Infinity])
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} else {
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let base = (limit !== null) ? random.number(limit) : random.number()
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return `new Float32Array([${base + random.float()}])[0]`
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}
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}
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static double (limit = null) {
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let base = (limit !== null) ? random.number(limit) : random.number()
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let value = random.chance(10) ? -(base + random.float()) : (base + random.float())
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return `new Float64Array([${value}])[0]`
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}
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static unrestrictedDouble (limit = null) {
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if (random.chance(100)) {
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return random.pick([NaN, +Infinity, -Infinity])
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} else {
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let base = (limit !== null) ? random.number(limit) : random.number()
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let value = random.chance(10) ? -(base + random.float()) : (base + random.float())
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return `new Float64Array([${value}])[0]`
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}
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}
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static any () {
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return random.choose([
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[1, [typed.byte, typed.octet]],
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[1, [typed.short, typed.unsignedShort]],
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[1, [typed.long, typed.unsignedLong]],
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[1, [typed.float, typed.unrestrictedFloat]],
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[1, [typed.double, typed.unrestrictedDouble]]
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])
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}
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static arrayBuffer (byteLength = null) {
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let length = (byteLength !== null) ? byteLength : typed.unsignedShort()
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return `new ArrayBuffer(${length})`
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}
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static dataView (byteLength = null) {
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let length = (byteLength !== null) ? byteLength : typed.unsignedShort()
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return `new DataView(${typed.arrayBuffer(length)})`
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}
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static typedArray (byteLength = null) {
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let length = (byteLength !== null) ? byteLength : typed.unsignedShort()
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let arrType = random.item([
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'Int8', 'Uint8', 'Uint8Clamped',
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'Int16', 'Uint16',
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'Int32', 'Uint32',
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'Float32', 'Float64'
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])
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let method = `new ${arrType}Array`
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switch (random.number(16)) {
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case 0:
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return `${method}()`
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case 1:
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return `${method}(${this.typedArray()})`
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default:
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return `${method}(${length})`
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}
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}
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static bufferSource () {
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switch (random.number(4)) {
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case 0:
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return typed.arrayBuffer()
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case 1:
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return typed.dataView()
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default:
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return typed.typedArray()
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}
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}
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}
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module.exports = typed
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