From 5d7534dd4483841e39cb87a7c0c0766dfe08890a Mon Sep 17 00:00:00 2001
From: SEK1RO <vlad@sek1.ro>
Date: Tue, 5 Aug 2025 20:08:01 +0300
Subject: [PATCH] feat(Boolean)

---
 src/index.js       | 14 ++++++++++++++
 test/index.test.js | 25 ++++++++++++++++++++++---
 types/index.d.ts   |  2 +-
 3 files changed, 37 insertions(+), 4 deletions(-)

diff --git a/src/index.js b/src/index.js
index db82769..5198741 100644
--- a/src/index.js
+++ b/src/index.js
@@ -12,6 +12,13 @@ export { limits, memcpy, Type, Int, ConstString, ConstArray, ConstDataView, Stru
 export function serialize(dv, src, ...types) {
   const [type, ...inner_types] = types
 
+  if (type == Boolean && typeof src == 'boolean') {
+    if (dv.byteLength < 1) {
+      throw new Error('too small buffer')
+    }
+    dv.setUint8(0, src ? 1 : 0)
+    return
+  }
   if (type == Number && typeof src == 'number') {
     if (dv.byteLength < 8) {
       throw new Error('too small buffer')
@@ -68,6 +75,7 @@ export function serialize(dv, src, ...types) {
 
     const frame = new DataView(dv.buffer, dv.byteOffset + 4)
     memcpy(frame, src)
+    return
   }
   if (type instanceof Type) {
     type.serialize(dv, src, ...inner_types)
@@ -78,6 +86,9 @@ export function serialize(dv, src, ...types) {
 export function parse(dv, ...types) {
   const [type, ...inner_types] = types
 
+  if (type == Boolean) {
+    return !!dv.getUint8(0)
+  }
   if (type == Number) {
     return dv.getFloat64(0)
   }
@@ -138,6 +149,9 @@ export function sizeofHead(...args) {
 export function sizeof(...args) {
   const [arg, ...inner_args] = args
 
+  if (arg == Boolean || typeof arg == 'boolean') {
+    return 1
+  }
   if (arg == Number || typeof arg == 'number') {
     return 8
   }
diff --git a/test/index.test.js b/test/index.test.js
index 784cd08..2fe8c86 100644
--- a/test/index.test.js
+++ b/test/index.test.js
@@ -3,6 +3,16 @@ import { expectDataViewEqual, filledDataView, sizedDataView } from '.'
 import { parse, serialize, sizeof, sizeofHead } from '../src'
 
 describe('serialize', () => {
+  test('Boolean', () => {
+    const expected = filledDataView([0x01])
+    let actual = sizedDataView(0)
+    expect(() => serialize(actual, true, Boolean)).toThrow()
+
+    actual = sizedDataView(1)
+
+    serialize(actual, true, Boolean)
+    expectDataViewEqual(actual, expected)
+  })
   test('Number', () => {
     const expected = filledDataView([0x40, 0x97, 0xF2, 0x80, 0x00, 0x00, 0x00, 0x00])
     let dv = sizedDataView(7)
@@ -61,11 +71,15 @@ describe('serialize', () => {
 })
 
 describe('parse', () => {
+  test('Boolean', () => {
+    expect(parse(filledDataView([0x00]), Boolean)).toBeFalsy()
+    expect(parse(filledDataView([0x01]), Boolean)).toBeTruthy()
+  })
   test('Number', () => {
     const expected = 1532.625
     const dv = filledDataView([0x40, 0x97, 0xF2, 0x80, 0x00, 0x00, 0x00, 0x00])
     const actual = parse(dv, Number)
-    expectDataViewEqual(actual, expected)
+    expect(actual).toEqual(expected)
   })
   test('String', () => {
     const expected = 'hello'
@@ -74,7 +88,7 @@ describe('parse', () => {
       0x68, 0x65, 0x6C, 0x6C, 0x6F
     ])
     const actual = parse(dv, String)
-    expectDataViewEqual(actual, expected)
+    expect(actual).toEqual(expected)
   })
   test('Array, Number', () => {
     const expected = [1, 2]
@@ -84,7 +98,7 @@ describe('parse', () => {
       0x40, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00,
     ])
     const actual = parse(dv, Array, Number)
-    expectDataViewEqual(actual, expected)
+    expect(actual).toEqual(expected)
   })
   test('DataView', () => {
     const expected = filledDataView([
@@ -112,11 +126,16 @@ describe('sizeofHead', () => {
     expect(sizeofHead(Array, Number)).toEqual(4)
     expect(sizeofHead([1], Array, Number)).toEqual(4)
   })
+  test('DataView', () => {
+    expect(sizeofHead(DataView)).toEqual(4)
+    expect(sizeofHead(filledDataView([0x01]), DataView)).toEqual(4)
+  })
 })
 
 describe('sizeof', () => {
   test('unknown', () => {
     expect(() => sizeof(String)).toThrow()
     expect(() => sizeof(Array, Number)).toThrow()
+    expect(() => sizeof(DataView)).toThrow()
   })
 })
diff --git a/types/index.d.ts b/types/index.d.ts
index e0fbae4..30106e9 100644
--- a/types/index.d.ts
+++ b/types/index.d.ts
@@ -9,7 +9,7 @@ import { Struct } from "./Struct";
 
 export { memcpy, limits, Type, Int, ConstString, ConstArray, ConstDataView, Struct }
 
-export type SerializableType = NumberConstructor | StringConstructor | ArrayConstructor | DataViewConstructor | Type
+export type SerializableType = BooleanConstructor | NumberConstructor | StringConstructor | ArrayConstructor | DataViewConstructor | Type
 export type Serializable = unknown
 
 /**