feat(README, filledDataView, sizedDataView)

LICENSE

@@ -0,0 +1,165 @@
+                   GNU LESSER GENERAL PUBLIC LICENSE
+                       Version 3, 29 June 2007
+
+ Copyright (C) 2007 Free Software Foundation, Inc. <https://fsf.org/>
+ Everyone is permitted to copy and distribute verbatim copies
+ of this license document, but changing it is not allowed.
+
+
+  This version of the GNU Lesser General Public License incorporates
+the terms and conditions of version 3 of the GNU General Public
+License, supplemented by the additional permissions listed below.
+
+  0. Additional Definitions.
+
+  As used herein, "this License" refers to version 3 of the GNU Lesser
+General Public License, and the "GNU GPL" refers to version 3 of the GNU
+General Public License.
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+Library.

README.md

@@ -0,0 +1,68 @@
+# serialize-js
+
+```js
+import * as s from '@sek1ro/serialize'
+
+const User = s.Struct({
+  id: s.Int(32, 'unsigned'),
+  name: String,
+  age: Number,
+  array: [Array, Boolean],
+  raw_data: DataView,
+})
+
+const user = {
+  id: 1,
+  name: 'john',
+  age: 20,
+  array: [true, false],
+  raw_data: s.filledDataView([0x00, 0x00, 0x00, 0xff]),
+}
+
+const dv = s.sizedDataView(sizeof(user, User))
+s.serialize(dv, user, User)
+
+const user_copy = s.parse(dv, User)
+```
+
+## Contents
+
+- [Types](#types)
+- [What is headless?](#headless)
+
+## Types
+
+### ES types
+
+- Boolean
+- Number
+- String (headless)
+- Array (headless)
+- DataView (headless)
+
+### Built-in types
+
+- Int(bits: 8 | 16 | 32, sign: 'signed' | 'unsigned')
+- ConstString(size: number)
+- ConstArray(size: number)
+- ConstDataView(byte_size: number)
+- Struct(type_obj: Record<string, SerializableType | SerializableType[]>)
+- Sequence(types: (SerializableType | SerializableType[])[])
+
+## Headless
+
+If type has variable size in bytes, if sizeof type different for specific object, it's called headless.
+
+```js
+const array = [true, false]
+
+sizeof(ConstArray(2), Boolean) // 2
+sizeof(array, ConstArray(2), Boolean) // 2
+
+sizeof(Array, Boolean) // Error: unknown sizeof Array, Boolean
+
+sizeof(array, Array, Boolean) // 2
+```
+
+Library has function `isHeadless(...types: SerializableType[])` to check this.
+It's used in `Structure`, if type is headless, in head of structure it's stored as uint32 offset to beginning of type's body, if type isn't headless, it's stored directly in head of structure

package.json

@@ -11,7 +11,9 @@
   "type": "module",
   "main": "dist/index.js",
   "files": [
-    "dist"
+    "dist",
+    "LICENSE",
+    "README.md"
   ],
   "scripts": {
     "build": "npx esbuild src/index.js --bundle --minify --outfile=dist/index.js --format=esm && npx rollup -c",

src/Struct.js

@@ -18,7 +18,13 @@ export function Struct(type_obj) {
       types = [value]
     }
 
-    arg[key] = types.map((type) => type.name)
+    arg[key] = types.map((type) => {
+      if (typeof type == 'function') {
+        return type.name
+      } else {
+        return type
+      }
+    })
 
     const headless = isHeadless(...types)
     obj._info_by_key.set(key, {

src/index.js

@@ -1,5 +1,5 @@
 import { limits } from './limits'
-import { memcpy } from './mem'
+import { sizedDataView, filledDataView, memcpy } from './mem'
 import { Type } from './Type'
 import { Int } from './Int'
 import { ConstString } from './ConstString'
@@ -10,6 +10,8 @@ import { Struct } from './Struct'
 
 export {
   limits,
+  sizedDataView,
+  filledDataView,
   memcpy,
   Type,
   Int,
@@ -217,7 +219,13 @@ export function sizeof(...args) {
   if (arg2 instanceof Type) {
     return arg2.sizeof(arg, ...inner_args2)
   }
-  throw new Error('unknown size of ' + args)
+  throw new Error(
+    'unknown size of ' +
+      args.map((arg) => {
+        if (typeof arg == 'function') return arg.name
+        return arg
+      }),
+  )
 }
 
 export function isSerializableType(type) {

src/mem.js

@@ -1,3 +1,19 @@
+export function filledDataView(bytes) {
+  const ab = new ArrayBuffer(bytes.length)
+  const dv = new DataView(ab)
+
+  for (let i = 0; i < bytes.length; i++) {
+    dv.setInt8(i, bytes[i])
+  }
+
+  return dv
+}
+
+export function sizedDataView(length) {
+  const ab = new ArrayBuffer(length)
+  return new DataView(ab)
+}
+
 export function memcpy(dest, src) {
   const min_size =
     dest.byteLength > src.byteLength ? src.byteLength : dest.byteLength

test/ConstArray.test.js

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "vitest";
 import { ConstArray, isHeadless, parse, serialize, sizeof, sizeofHead } from "../src";
-import { expectDataViewEqual, filledDataView, sizedDataView } from ".";
+import { expectDataViewEqual } from ".";
+import { filledDataView, sizedDataView } from "../src";
 
 describe(ConstArray.name, () => {
   test('serialize, Number', () => {

test/ConstDataView.test.js

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "vitest";
 import { ConstDataView, parse, serialize, sizeofHead } from "../src";
-import { expectDataViewEqual, filledDataView } from ".";
+import { expectDataViewEqual } from ".";
+import { filledDataView } from "../src";
 
 describe(ConstDataView.name, () => {
   test('serialize', () => {

test/ConstString.test.js

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "vitest";
 import { ConstString, parse, serialize, sizeofHead } from "../src";
-import { expectDataViewEqual, filledDataView, sizedDataView } from ".";
+import { expectDataViewEqual } from ".";
+import { filledDataView, sizedDataView } from '../src'
 
 describe(ConstString.name, () => {
   test('serialize', () => {

test/Int.test.js

@@ -1,5 +1,6 @@
 import { describe, expect, test } from "vitest";
-import { expectDataViewEqual, filledDataView, sizedDataView } from '.';
+import { expectDataViewEqual } from '.';
+import { filledDataView, sizedDataView } from '../src'
 import { Int, parse, serialize, sizeof } from "../src";
 
 describe(Int.name, () => {

test/Sequence.test.js

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "vitest";
 import { ConstString, Int, isHeadless, parse, Sequence, serialize, sizeof } from "../src";
-import { expectDataViewEqual, filledDataView, sizedDataView } from '.'
+import { expectDataViewEqual } from '.'
+import { filledDataView, sizedDataView } from '../src'
 
 describe(Sequence.name, () => {
   const Type = Sequence([Int(8, 'unsigned'), String, Boolean])

test/Struct.test.js

@@ -1,6 +1,7 @@
 import { describe, expect, test } from "vitest";
 import { ConstDataView, parse, serialize, sizeof, Struct } from "../src";
-import { expectDataViewEqual, filledDataView, sizedDataView } from ".";
+import { filledDataView, sizedDataView } from '../src'
+import { expectDataViewEqual } from ".";
 
 describe(Struct.name, () => {
   

test/index.js

@@ -1,19 +1,3 @@
-export function filledDataView(bytes) {
-  const ab = new ArrayBuffer(bytes.length)
-  const dv = new DataView(ab)
-
-  for (let i = 0; i < bytes.length; i++) {
-    dv.setInt8(i, bytes[i])
-  }
-
-  return dv
-}
-
-export function sizedDataView(length) {
-  const ab = new ArrayBuffer(length)
-  return new DataView(ab)
-}
-
 export function expectDataViewEqual(actual, expected) {
   const actualBytes = new Uint8Array(actual.buffer, actual.byteOffset, actual.byteLength)
   const expectedBytes = new Uint8Array(expected.buffer, expected.byteOffset, expected.byteLength)

test/index.test.js

@@ -1,6 +1,38 @@
 import { describe, test, expect } from 'vitest'
-import { expectDataViewEqual, filledDataView, sizedDataView } from '.'
-import { isHeadless, parse, serialize, sizeof, sizeofHead } from '../src'
+import { expectDataViewEqual } from '.'
+import { filledDataView, sizedDataView } from '../src'
+import { Int, isHeadless, parse, serialize, sizeof, sizeofHead, Struct } from '../src'
+
+describe('README', () => {
+  test('header', () => {
+    const User = Struct({
+        id: Int(32, 'unsigned'),
+        name: String,
+        age: Number,
+        array: [Array, Boolean],
+        raw_data: DataView,  
+    })
+
+    const user = {
+        id: 1,
+        name: 'john',
+        age: 20,
+        array: [true, false],
+        raw_data: filledDataView([0x00, 0x00, 0x00, 0xFF]),
+    }
+
+    const dv = sizedDataView(sizeof(user, User))
+    serialize(dv, user, User)
+
+    const user_copy = parse(dv, User)
+
+    expect(user_copy).toEqual(user)
+    expectDataViewEqual(user_copy.raw_data, user.raw_data)
+  })
+  test('unknown sizeof', () => {
+    expect(() => sizeof(Array, Boolean)).toThrowError('unknown size of Array,Boolean')
+  })
+})
 
 describe('serialize', () => {
   test('Boolean', () => {

test/mem.test.js

@@ -1,5 +1,5 @@
 import { expect, test } from "vitest";
-import { filledDataView, sizedDataView } from ".";
+import { filledDataView, sizedDataView } from '../src'
 import { memcpy } from "../src";
 
 test('memcpy', () => {

types/index.d.ts

@@ -1,4 +1,4 @@
-import { memcpy } from './mem'
+import { sizedDataView, filledDataView, memcpy } from './mem'
 import { limits } from './limits'
 import { Type } from './Type'
 import { Int } from './Int'
@@ -9,6 +9,8 @@ import { Sequence } from './Sequence'
 import { Struct } from './Struct'
 
 export {
+  sizedDataView,
+  filledDataView,
   memcpy,
   limits,
   Type,

types/mem.d.ts

@@ -1,3 +1,6 @@
+export function sizedDataView(size: number): DataView
+export function filledDataView(bytes: number[]): DataView
+
 /**
  * copies max possible number of bytes from src to dest (min of both sizes)
  */