Update README.md

Reviewed-on: Infendro/bytes-kt#10

.gitea/workflows/main.yaml

@@ -1,36 +0,0 @@
-on:
-  push:
-    branches:
-      - main
-
-env:
-  GIT__TOKEN: ${{ secrets.TOKEN }}
-
-jobs:
-  publish:
-    runs-on: linux
-    steps:
-      - uses: actions/checkout@v4
-
-      - uses: actions/cache/restore@v4
-        with:
-          key: gradle
-          path: |
-            ~/.gradle/caches/
-            ~/.gradle/wrapper/
-            ~/.konan/
-
-      - uses: actions/setup-java@v4
-        with:
-          java-version: '24'
-          distribution: 'temurin'
-
-      - run: ./gradlew publish
-
-      - uses: actions/cache/save@v4
-        with:
-          key: gradle
-          path: |
-            ~/.gradle/caches/
-            ~/.gradle/wrapper/
-            ~/.konan/

.gitea/workflows/publish.yaml

@@ -0,0 +1,47 @@
+on:
+  push:
+    branches: [ main ]
+
+jobs:
+  publish:
+    runs-on: linux
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          key: gradle-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+
+      - name: Cache Konan
+        uses: actions/cache@v4
+        with:
+          key: konan-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: konan
+          path: |
+            ~/.konan/
+
+      - name: Cache Node
+        uses: actions/cache@v4
+        with:
+          key: node-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: node
+          path: |
+            ~/.gradle/nodejs
+            ~/.gradle/yarn
+
+      - name: Publish
+        run: ./gradlew publish
+        env:
+          INFENDRO__TOKEN: ${{ secrets.TOKEN }}

.gitea/workflows/test.yaml

@@ -0,0 +1,28 @@
+on:
+  pull_request:
+    branches: [ main ]
+
+jobs:
+  test:
+    runs-on: linux
+    steps:
+      - name: Checkout
+        uses: actions/checkout@v4
+
+      - name: Setup Java
+        uses: actions/setup-java@v4
+        with:
+          java-version: '24'
+          distribution: 'temurin'
+
+      - name: Cache Gradle
+        uses: actions/cache@v4
+        with:
+          key: gradle-${{ hashFiles('**/libs.versions.toml') }}
+          restore-keys: gradle
+          path: |
+            ~/.gradle/caches/
+            ~/.gradle/wrapper/
+
+      - name: Test
+        run: ./gradlew jvmTest

README.md

@@ -0,0 +1,17 @@
+# bytes.kt
+
+`bytes.kt` is a Kotlin Multiplatform library that provides helper functions for working with bytes.
+
+## Installation
+
+Add the following to your `build.gradle.kts`.
+
+```kotlin
+repositories {
+    maven("https://git.infendro.com/api/packages/Infendro/maven")
+}
+
+commonMain.dependencies {
+    implementation("com.infendro:bytes:1.4.2")
+}
+```

build.gradle.kts

@@ -1,48 +1,40 @@
-group = "com.infendro"
+@file:OptIn(ExperimentalWasmDsl::class)
-version = "1.1.0"
 
-repositories {
+import com.infendro.plugin.infendro
-    mavenCentral()
+import com.infendro.plugin.token
-}
+import org.jetbrains.kotlin.gradle.ExperimentalWasmDsl
+
+group = "com.infendro"
+version = "1.4.2"
 
 plugins {
+    alias(libs.plugins.infendro)
     alias(libs.plugins.multiplatform)
     id("maven-publish")
 }
 
 kotlin {
     jvm()
-    js {
-        nodejs()
-    }
     linuxX64()
-}
+    linuxArm64()
+    mingwX64()
+    macosX64()
+    macosArm64()
+    js { nodejs() }
+    wasmJs { nodejs() }
+    wasmWasi { nodejs() }
 
-publishing {
     repositories {
-        maven {
+        mavenCentral()
-            url = uri("https://git.infendro.com/api/packages/Infendro/maven")
-            authentication.create("header", HttpHeaderAuthentication::class)
-            credentials(HttpHeaderCredentials::class) {
-                val token = secret("git.token") ?: throw GradleException()
-
-                name = "Authorization"
-                value = "token $token"
     }
+
+    sourceSets {
+        commonTest.dependencies {
+            implementation(libs.test)
         }
     }
 }
 
-fun secret(
+publishing.repositories {
-    key: String,
+    infendro(token)
-): String? {
-    val property = key
-    val environment = key
-        .uppercase()
-        .replace(".", "__")
-
-    val prop = properties[property] as String?
-    val env = System.getenv(environment)
-
-    return prop ?: env
 }

gradle/libs.versions.toml

@@ -1,5 +1,10 @@
 [versions]
-kotlin = "2.1.20"
+infendro = "1.1.0"
+kotlin = "2.3.0"
 
 [plugins]
+infendro = { id = "com.infendro.plugin", version.ref = "infendro" }
 multiplatform = { id = "org.jetbrains.kotlin.multiplatform", version.ref = "kotlin" }
+
+[libraries]
+test = { module = "org.jetbrains.kotlin:kotlin-test", version.ref = "kotlin" }

gradle/wrapper/gradle-wrapper.properties

@@ -1,6 +1,7 @@
-#Sun May 18 00:11:37 CEST 2025
 distributionBase=GRADLE_USER_HOME
 distributionPath=wrapper/dists
-distributionUrl=https\://services.gradle.org/distributions/gradle-8.10.2-bin.zip
+distributionUrl=https\://services.gradle.org/distributions/gradle-8.14-bin.zip
+networkTimeout=10000
+validateDistributionUrl=true
 zipStoreBase=GRADLE_USER_HOME
 zipStorePath=wrapper/dists

gradlew

@@ -15,6 +15,8 @@
 # See the License for the specific language governing permissions and
 # limitations under the License.
 #
+# SPDX-License-Identifier: Apache-2.0
+#
 
 ##############################################################################
 #
@@ -55,7 +57,7 @@
 #       Darwin, MinGW, and NonStop.
 #
 #   (3) This script is generated from the Groovy template
-#       https://github.com/gradle/gradle/blob/master/subprojects/plugins/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
+#       https://github.com/gradle/gradle/blob/HEAD/platforms/jvm/plugins-application/src/main/resources/org/gradle/api/internal/plugins/unixStartScript.txt
 #       within the Gradle project.
 #
 #       You can find Gradle at https://github.com/gradle/gradle/.
@@ -80,13 +82,11 @@ do
     esac
 done
 
-APP_HOME=$( cd "${APP_HOME:-./}" && pwd -P ) || exit
+# This is normally unused
-
+# shellcheck disable=SC2034
-APP_NAME="Gradle"
 APP_BASE_NAME=${0##*/}
-
+# Discard cd standard output in case $CDPATH is set (https://github.com/gradle/gradle/issues/25036)
-# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
+APP_HOME=$( cd -P "${APP_HOME:-./}" > /dev/null && printf '%s\n' "$PWD" ) || exit
-DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
 
 # Use the maximum available, or set MAX_FD != -1 to use that value.
 MAX_FD=maximum
@@ -114,7 +114,7 @@ case "$( uname )" in                #(
   NONSTOP* )        nonstop=true ;;
 esac
 
-CLASSPATH=$APP_HOME/gradle/wrapper/gradle-wrapper.jar
+CLASSPATH="\\\"\\\""
 
 
 # Determine the Java command to use to start the JVM.
@@ -133,22 +133,29 @@ location of your Java installation."
     fi
 else
     JAVACMD=java
-    which java >/dev/null 2>&1 || die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+    if ! command -v java >/dev/null 2>&1
+    then
+        die "ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
 
 Please set the JAVA_HOME variable in your environment to match the
 location of your Java installation."
+    fi
 fi
 
 # Increase the maximum file descriptors if we can.
 if ! "$cygwin" && ! "$darwin" && ! "$nonstop" ; then
     case $MAX_FD in #(
       max*)
+        # In POSIX sh, ulimit -H is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         MAX_FD=$( ulimit -H -n ) ||
             warn "Could not query maximum file descriptor limit"
     esac
     case $MAX_FD in  #(
       '' | soft) :;; #(
       *)
+        # In POSIX sh, ulimit -n is undefined. That's why the result is checked to see if it worked.
+        # shellcheck disable=SC2039,SC3045
         ulimit -n "$MAX_FD" ||
             warn "Could not set maximum file descriptor limit to $MAX_FD"
     esac
@@ -193,18 +200,28 @@ if "$cygwin" || "$msys" ; then
     done
 fi
 
-# Collect all arguments for the java command;
+
-#   * $DEFAULT_JVM_OPTS, $JAVA_OPTS, and $GRADLE_OPTS can contain fragments of
+# Add default JVM options here. You can also use JAVA_OPTS and GRADLE_OPTS to pass JVM options to this script.
-#     shell script including quotes and variable substitutions, so put them in
+DEFAULT_JVM_OPTS='"-Xmx64m" "-Xms64m"'
-#     double quotes to make sure that they get re-expanded; and
+
-#   * put everything else in single quotes, so that it's not re-expanded.
+# Collect all arguments for the java command:
+#   * DEFAULT_JVM_OPTS, JAVA_OPTS, and optsEnvironmentVar are not allowed to contain shell fragments,
+#     and any embedded shellness will be escaped.
+#   * For example: A user cannot expect ${Hostname} to be expanded, as it is an environment variable and will be
+#     treated as '${Hostname}' itself on the command line.
 
 set -- \
         "-Dorg.gradle.appname=$APP_BASE_NAME" \
         -classpath "$CLASSPATH" \
-        org.gradle.wrapper.GradleWrapperMain \
+        -jar "$APP_HOME/gradle/wrapper/gradle-wrapper.jar" \
         "$@"
 
+# Stop when "xargs" is not available.
+if ! command -v xargs >/dev/null 2>&1
+then
+    die "xargs is not available"
+fi
+
 # Use "xargs" to parse quoted args.
 #
 # With -n1 it outputs one arg per line, with the quotes and backslashes removed.

gradlew.bat

@@ -13,8 +13,10 @@
 @rem See the License for the specific language governing permissions and
 @rem limitations under the License.
 @rem
+@rem SPDX-License-Identifier: Apache-2.0
+@rem
 
-@if "%DEBUG%" == "" @echo off
+@if "%DEBUG%"=="" @echo off
 @rem ##########################################################################
 @rem
 @rem  Gradle startup script for Windows
@@ -25,7 +27,8 @@
 if "%OS%"=="Windows_NT" setlocal
 
 set DIRNAME=%~dp0
-if "%DIRNAME%" == "" set DIRNAME=.
+if "%DIRNAME%"=="" set DIRNAME=.
+@rem This is normally unused
 set APP_BASE_NAME=%~n0
 set APP_HOME=%DIRNAME%
 
@@ -40,13 +43,13 @@ if defined JAVA_HOME goto findJavaFromJavaHome
 
 set JAVA_EXE=java.exe
 %JAVA_EXE% -version >NUL 2>&1
-if "%ERRORLEVEL%" == "0" goto execute
+if %ERRORLEVEL% equ 0 goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH.
+echo ERROR: JAVA_HOME is not set and no 'java' command could be found in your PATH. 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
@@ -56,32 +59,34 @@ set JAVA_EXE=%JAVA_HOME%/bin/java.exe
 
 if exist "%JAVA_EXE%" goto execute
 
-echo.
+echo. 1>&2
-echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME%
+echo ERROR: JAVA_HOME is set to an invalid directory: %JAVA_HOME% 1>&2
-echo.
+echo. 1>&2
-echo Please set the JAVA_HOME variable in your environment to match the
+echo Please set the JAVA_HOME variable in your environment to match the 1>&2
-echo location of your Java installation.
+echo location of your Java installation. 1>&2
 
 goto fail
 
 :execute
 @rem Setup the command line
 
-set CLASSPATH=%APP_HOME%\gradle\wrapper\gradle-wrapper.jar
+set CLASSPATH=
 
 
 @rem Execute Gradle
-"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" org.gradle.wrapper.GradleWrapperMain %*
+"%JAVA_EXE%" %DEFAULT_JVM_OPTS% %JAVA_OPTS% %GRADLE_OPTS% "-Dorg.gradle.appname=%APP_BASE_NAME%" -classpath "%CLASSPATH%" -jar "%APP_HOME%\gradle\wrapper\gradle-wrapper.jar" %*
 
 :end
 @rem End local scope for the variables with windows NT shell
-if "%ERRORLEVEL%"=="0" goto mainEnd
+if %ERRORLEVEL% equ 0 goto mainEnd
 
 :fail
 rem Set variable GRADLE_EXIT_CONSOLE if you need the _script_ return code instead of
 rem the _cmd.exe /c_ return code!
-if  not "" == "%GRADLE_EXIT_CONSOLE%" exit 1
+set EXIT_CODE=%ERRORLEVEL%
-exit /b 1
+if %EXIT_CODE% equ 0 set EXIT_CODE=1
+if not ""=="%GRADLE_EXIT_CONSOLE%" exit %EXIT_CODE%
+exit /b %EXIT_CODE%
 
 :mainEnd
 if "%OS%"=="Windows_NT" endlocal

settings.gradle.kts

@@ -1 +1,6 @@
-rootProject.name = "bytearray"
+rootProject.name = "bytes"
+
+pluginManagement.repositories {
+    maven("https://git.infendro.com/api/packages/Infendro/maven")
+    mavenCentral()
+}

src/commonMain/kotlin/com/infendro/bytearray/ByteOrder.kt

@@ -1,22 +0,0 @@
-package com.infendro.bytearray
-
-enum class ByteOrder {
-    BIG_ENDIAN {
-        override fun normalize(
-            bytes: ByteArray,
-        ): ByteArray {
-            return bytes
-        }
-    },
-    LITTLE_ENDIAN {
-        override fun normalize(
-            bytes: ByteArray,
-        ): ByteArray {
-            return bytes.reversedArray()
-        }
-    };
-
-    internal abstract fun normalize(
-        bytes: ByteArray,
-    ): ByteArray
-}

src/commonMain/kotlin/com/infendro/bytearray/Collection.kt

@@ -1,7 +0,0 @@
-package com.infendro.bytearray
-
-fun MutableCollection<Byte>.addAll(
-    bytes: ByteArray,
-): Boolean {
-    return addAll(bytes)
-}

src/commonMain/kotlin/com/infendro/bytearray/Int.kt

@@ -1,49 +0,0 @@
-package com.infendro.bytearray
-
-import com.infendro.bytearray.ByteOrder.BIG_ENDIAN
-
-fun Int.toByteArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ByteArray {
-    val bytes = ByteArray(4) { i ->
-        val offset = (3 - i) * 8
-        (this ushr offset).toByte()
-    }
-    return order.normalize(bytes)
-}
-
-fun ByteArray.toInt(
-    order: ByteOrder = BIG_ENDIAN,
-): Int {
-    if (size != 4) throw Exception()
-
-    val bytes = order.normalize(this)
-    return bytes.fold(0) { acc, byte ->
-        (acc shl 8) or (byte.toInt() and 0xFF)
-    }
-}
-
-fun Collection<Byte>.toInt(
-    order: ByteOrder = BIG_ENDIAN,
-): Int {
-    return toByteArray()
-        .toInt(order)
-}
-
-fun ByteArray.toIntArray(
-    order: ByteOrder = BIG_ENDIAN,
-): IntArray {
-    if (size % 4 != 0) throw Exception()
-
-    return toList()
-        .chunked(4)
-        .map { it.toInt(order) }
-        .toIntArray()
-}
-
-fun Collection<Byte>.toIntArray(
-    order: ByteOrder = BIG_ENDIAN,
-): IntArray {
-    return toByteArray()
-        .toIntArray(order)
-}

src/commonMain/kotlin/com/infendro/bytearray/Long.kt

@@ -1,49 +0,0 @@
-package com.infendro.bytearray
-
-import com.infendro.bytearray.ByteOrder.BIG_ENDIAN
-
-fun Long.toByteArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ByteArray {
-    val bytes = ByteArray(8) { i ->
-        val offset = (7 - i) * 8
-        (this ushr offset).toByte()
-    }
-    return order.normalize(bytes)
-}
-
-fun ByteArray.toLong(
-    order: ByteOrder = BIG_ENDIAN,
-): Long {
-    if (size != 8) throw Exception()
-
-    val bytes = order.normalize(this)
-    return bytes.fold(0L) { acc, byte ->
-        (acc shl 8) or (byte.toLong() and 0xFFL)
-    }
-}
-
-fun Collection<Byte>.toLong(
-    order: ByteOrder = BIG_ENDIAN,
-): Long {
-    return toByteArray()
-        .toLong(order)
-}
-
-fun ByteArray.toLongArray(
-    order: ByteOrder = BIG_ENDIAN,
-): LongArray {
-    if (size % 8 != 0) throw Exception()
-
-    return toList()
-        .chunked(8)
-        .map { it.toLong(order) }
-        .toLongArray()
-}
-
-fun Collection<Byte>.toLongArray(
-    order: ByteOrder = BIG_ENDIAN,
-): LongArray {
-    return toByteArray()
-        .toLongArray(order)
-}

src/commonMain/kotlin/com/infendro/bytearray/UInt.kt

@@ -1,49 +0,0 @@
-package com.infendro.bytearray
-
-import com.infendro.bytearray.ByteOrder.BIG_ENDIAN
-
-fun UInt.toByteArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ByteArray {
-    val bytes = ByteArray(4) { i ->
-        val offset = (3 - i) * 8
-        (this shr offset).toByte()
-    }
-    return order.normalize(bytes)
-}
-
-fun ByteArray.toUInt(
-    order: ByteOrder = BIG_ENDIAN,
-): UInt {
-    if (size != 4) throw Exception()
-
-    val bytes = order.normalize(this)
-    return bytes.fold(0U) { acc, byte ->
-        (acc shl 8) or (byte.toUInt() and 0xFFU)
-    }
-}
-
-fun Collection<Byte>.toUInt(
-    order: ByteOrder = BIG_ENDIAN,
-): UInt {
-    return toByteArray()
-        .toUInt(order)
-}
-
-fun ByteArray.toUIntArray(
-    order: ByteOrder = BIG_ENDIAN,
-): UIntArray {
-    if (size % 4 != 0) throw Exception()
-
-    return toList()
-        .chunked(4)
-        .map { it.toUInt(order) }
-        .toUIntArray()
-}
-
-fun Collection<Byte>.toUIntArray(
-    order: ByteOrder = BIG_ENDIAN,
-): UIntArray {
-    return toByteArray()
-        .toUIntArray(order)
-}

src/commonMain/kotlin/com/infendro/bytearray/ULong.kt

@@ -1,49 +0,0 @@
-package com.infendro.bytearray
-
-import com.infendro.bytearray.ByteOrder.BIG_ENDIAN
-
-fun ULong.toByteArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ByteArray {
-    val bytes = ByteArray(8) { i ->
-        val offset = (7 - i) * 8
-        (this shr offset).toByte()
-    }
-    return order.normalize(bytes)
-}
-
-fun ByteArray.toULong(
-    order: ByteOrder = BIG_ENDIAN,
-): ULong {
-    if (size != 8) throw Exception()
-
-    val bytes = order.normalize(this)
-    return bytes.fold(0UL) { acc, byte ->
-        (acc shl 8) or (byte.toULong() and 0xFFUL)
-    }
-}
-
-fun Collection<Byte>.toULong(
-    order: ByteOrder = BIG_ENDIAN,
-): ULong {
-    return toByteArray()
-        .toULong(order)
-}
-
-fun ByteArray.toULongArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ULongArray {
-    if (size % 8 != 0) throw Exception()
-
-    return toList()
-        .chunked(8)
-        .map { it.toULong(order) }
-        .toULongArray()
-}
-
-fun Collection<Byte>.toULongArray(
-    order: ByteOrder = BIG_ENDIAN,
-): ULongArray {
-    return toByteArray()
-        .toULongArray(order)
-}

src/commonMain/kotlin/com/infendro/bytearray/operation.kt

@@ -1,35 +0,0 @@
-package com.infendro.bytearray
-
-import kotlin.experimental.and
-import kotlin.experimental.or
-import kotlin.experimental.xor
-
-infix fun ByteArray.and(
-    that: ByteArray,
-): ByteArray {
-    if (this.size != that.size) throw Exception()
-
-    return ByteArray(size) { i ->
-        this[i] and that[i]
-    }
-}
-
-infix fun ByteArray.or(
-    that: ByteArray,
-): ByteArray {
-    if (this.size != that.size) throw Exception()
-
-    return ByteArray(size) { i ->
-        this[i] or that[i]
-    }
-}
-
-infix fun ByteArray.xor(
-    that: ByteArray,
-): ByteArray {
-    if (this.size != that.size) throw Exception()
-
-    return ByteArray(size) { i ->
-        this[i] xor that[i]
-    }
-}

src/commonMain/kotlin/com/infendro/bytes/ByteOrder.kt

@@ -0,0 +1,5 @@
+package com.infendro.bytes
+
+enum class ByteOrder {
+    BIG_ENDIAN, LITTLE_ENDIAN;
+}

src/commonMain/kotlin/com/infendro/bytes/byte/Operator.kt

@@ -0,0 +1,7 @@
+package com.infendro.bytes.byte
+
+import kotlin.experimental.inv
+
+operator fun Byte.not(): Byte {
+    return inv()
+}

src/commonMain/kotlin/com/infendro/bytes/bytearray/Conversion.kt

@@ -0,0 +1,145 @@
+package com.infendro.bytes.bytearray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun ByteArray.toInt(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Int {
+    require(startIndex in 0..(size - 4))
+
+    return when (order) {
+        BIG_ENDIAN -> {
+            ((this[startIndex].toInt() and 0xFF) shl 24) or
+                    ((this[startIndex + 1].toInt() and 0xFF) shl 16) or
+                    ((this[startIndex + 2].toInt() and 0xFF) shl 8) or
+                    (this[startIndex + 3].toInt() and 0xFF)
+        }
+        LITTLE_ENDIAN -> {
+            (this[startIndex].toInt() and 0xFF) or
+                    ((this[startIndex + 1].toInt() and 0xFF) shl 8) or
+                    ((this[startIndex + 2].toInt() and 0xFF) shl 16) or
+                    ((this[startIndex + 3].toInt() and 0xFF) shl 24)
+        }
+    }
+}
+
+fun ByteArray.toLong(startIndex: Int = 0, order: ByteOrder = BIG_ENDIAN): Long {
+    require(startIndex in 0..(size - 8))
+
+    return when (order) {
+        BIG_ENDIAN -> {
+            ((this[startIndex].toLong() and 0xFFL) shl 56) or
+                    ((this[startIndex + 1].toLong() and 0xFFL) shl 48) or
+                    ((this[startIndex + 2].toLong() and 0xFFL) shl 40) or
+                    ((this[startIndex + 3].toLong() and 0xFFL) shl 32) or
+                    ((this[startIndex + 4].toLong() and 0xFFL) shl 24) or
+                    ((this[startIndex + 5].toLong() and 0xFFL) shl 16) or
+                    ((this[startIndex + 6].toLong() and 0xFFL) shl 8) or
+                    (this[startIndex + 7].toLong() and 0xFFL)
+        }
+        LITTLE_ENDIAN -> {
+            (this[startIndex].toLong() and 0xFFL) or
+                    ((this[startIndex + 1].toLong() and 0xFFL) shl 8) or
+                    ((this[startIndex + 2].toLong() and 0xFFL) shl 16) or
+                    ((this[startIndex + 3].toLong() and 0xFFL) shl 24) or
+                    ((this[startIndex + 4].toLong() and 0xFFL) shl 32) or
+                    ((this[startIndex + 5].toLong() and 0xFFL) shl 40) or
+                    ((this[startIndex + 6].toLong() and 0xFFL) shl 48) or
+                    ((this[startIndex + 7].toLong() and 0xFFL) shl 56)
+        }
+    }
+}
+
+fun ByteArray.copyInto(
+    destination: IntArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0 && length % 4 == 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length / 4)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length / 4) { i ->
+                val offset = startIndex + (i * 4)
+                destination[destinationOffset + i] =
+                    ((this[offset].toInt() and 0xFF) shl 24) or
+                            ((this[offset + 1].toInt() and 0xFF) shl 16) or
+                            ((this[offset + 2].toInt() and 0xFF) shl 8) or
+                            (this[offset + 3].toInt() and 0xFF)
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length / 4) { i ->
+                val offset = startIndex + (i * 4)
+                destination[destinationOffset + i] =
+                    (this[offset].toInt() and 0xFF) or
+                            ((this[offset + 1].toInt() and 0xFF) shl 8) or
+                            ((this[offset + 2].toInt() and 0xFF) shl 16) or
+                            ((this[offset + 3].toInt() and 0xFF) shl 24)
+            }
+        }
+    }
+}
+
+fun ByteArray.toIntArray(startIndex: Int = 0, endIndex: Int = size, order: ByteOrder = BIG_ENDIAN): IntArray {
+    val length = endIndex - startIndex
+    val result = IntArray(length / 4)
+    copyInto(result, startIndex = startIndex, endIndex = endIndex, order = order)
+    return result
+}
+
+fun ByteArray.copyInto(
+    destination: LongArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0 && length % 8 == 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length / 8)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length / 8) { i ->
+                val offset = startIndex + (i * 8)
+                destination[destinationOffset + i] =
+                    ((this[offset].toLong() and 0xFFL) shl 56) or
+                            ((this[offset + 1].toLong() and 0xFFL) shl 48) or
+                            ((this[offset + 2].toLong() and 0xFFL) shl 40) or
+                            ((this[offset + 3].toLong() and 0xFFL) shl 32) or
+                            ((this[offset + 4].toLong() and 0xFFL) shl 24) or
+                            ((this[offset + 5].toLong() and 0xFFL) shl 16) or
+                            ((this[offset + 6].toLong() and 0xFFL) shl 8) or
+                            (this[offset + 7].toLong() and 0xFFL)
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length / 8) { i ->
+                val offset = startIndex + (i * 8)
+                destination[destinationOffset + i] =
+                    (this[offset].toLong() and 0xFFL) or
+                            ((this[offset + 1].toLong() and 0xFFL) shl 8) or
+                            ((this[offset + 2].toLong() and 0xFFL) shl 16) or
+                            ((this[offset + 3].toLong() and 0xFFL) shl 24) or
+                            ((this[offset + 4].toLong() and 0xFFL) shl 32) or
+                            ((this[offset + 5].toLong() and 0xFFL) shl 40) or
+                            ((this[offset + 6].toLong() and 0xFFL) shl 48) or
+                            ((this[offset + 7].toLong() and 0xFFL) shl 56)
+            }
+        }
+    }
+}
+
+fun ByteArray.toLongArray(startIndex: Int = 0, endIndex: Int = size, order: ByteOrder = BIG_ENDIAN): LongArray {
+    val length = endIndex - startIndex
+    val result = LongArray(length / 8)
+    copyInto(result, startIndex = startIndex, endIndex = endIndex, order = order)
+    return result
+}

src/commonMain/kotlin/com/infendro/bytes/bytearray/Operator.kt

@@ -0,0 +1,188 @@
+package com.infendro.bytes.bytearray
+
+import com.infendro.bytes.byte.not
+import kotlin.experimental.and
+import kotlin.experimental.or
+import kotlin.experimental.xor
+
+fun ByteArray.andInto(
+    that: ByteArray,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    thatStartIndex: Int = 0,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(thatStartIndex in 0..(that.size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] and that[thatStartIndex + i]
+    }
+}
+
+fun ByteArray.andInto(
+    that: Byte,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] and that
+    }
+}
+
+fun ByteArray.andWith(that: ByteArray, startIndex: Int = 0, endIndex: Int = size, thatStartIndex: Int = 0) =
+    andInto(that, this, startIndex, startIndex, endIndex, thatStartIndex)
+
+fun ByteArray.andWith(that: Byte, startIndex: Int = 0, endIndex: Int = size) =
+    andInto(that, this, startIndex, startIndex, endIndex)
+
+infix fun ByteArray.and(that: ByteArray): ByteArray {
+    val result = ByteArray(size)
+    andInto(that, result)
+    return result
+}
+
+infix fun ByteArray.and(that: Byte): ByteArray {
+    val result = ByteArray(size)
+    andInto(that, result)
+    return result
+}
+
+fun ByteArray.orInto(
+    that: ByteArray,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    thatStartIndex: Int = 0,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(thatStartIndex in 0..(that.size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] or that[thatStartIndex + i]
+    }
+}
+
+fun ByteArray.orInto(
+    that: Byte,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] or that
+    }
+}
+
+fun ByteArray.orWith(that: ByteArray, startIndex: Int = 0, endIndex: Int = size, thatStartIndex: Int = 0) =
+    orInto(that, this, startIndex, startIndex, endIndex, thatStartIndex)
+
+fun ByteArray.orWith(that: Byte, startIndex: Int = 0, endIndex: Int = size) =
+    orInto(that, this, startIndex, startIndex, endIndex)
+
+infix fun ByteArray.or(that: ByteArray): ByteArray {
+    val result = ByteArray(size)
+    orInto(that, result)
+    return result
+}
+
+infix fun ByteArray.or(that: Byte): ByteArray {
+    val result = ByteArray(size)
+    orInto(that, result)
+    return result
+}
+
+fun ByteArray.xorInto(
+    that: ByteArray,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    thatStartIndex: Int = 0,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(thatStartIndex in 0..(that.size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] xor that[thatStartIndex + i]
+    }
+}
+
+fun ByteArray.xorInto(
+    that: Byte,
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = this[startIndex + i] xor that
+    }
+}
+
+fun ByteArray.xorWith(that: ByteArray, startIndex: Int = 0, endIndex: Int = size, thatStartIndex: Int = 0) =
+    xorInto(that, this, startIndex, startIndex, endIndex, thatStartIndex)
+
+fun ByteArray.xorWith(that: Byte, startIndex: Int = 0, endIndex: Int = size) =
+    xorInto(that, this, startIndex, startIndex, endIndex)
+
+infix fun ByteArray.xor(that: ByteArray): ByteArray {
+    val result = ByteArray(size)
+    xorInto(that, result)
+    return result
+}
+
+infix fun ByteArray.xor(that: Byte): ByteArray {
+    val result = ByteArray(size)
+    xorInto(that, result)
+    return result
+}
+
+fun ByteArray.invInto(destination: ByteArray, destinationOffset: Int = 0, startIndex: Int = 0, endIndex: Int = size) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - length))
+
+    for (i in 0..<length) {
+        destination[destinationOffset + i] = !this[startIndex + i]
+    }
+}
+
+fun ByteArray.inv(startIndex: Int, endIndex: Int) =
+    invInto(this, startIndex, startIndex, endIndex)
+
+operator fun ByteArray.not(): ByteArray {
+    val result = ByteArray(size)
+    invInto(result)
+    return result
+}

src/commonMain/kotlin/com/infendro/bytes/int/Conversion.kt

@@ -0,0 +1,30 @@
+package com.infendro.bytes.int
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun Int.copyInto(destination: ByteArray, destinationOffset: Int = 0, order: ByteOrder = BIG_ENDIAN) {
+    require(destinationOffset in 0..(destination.size - 4))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            destination[destinationOffset] = (this shr 24).toByte()
+            destination[destinationOffset + 1] = (this shr 16).toByte()
+            destination[destinationOffset + 2] = (this shr 8).toByte()
+            destination[destinationOffset + 3] = this.toByte()
+        }
+        LITTLE_ENDIAN -> {
+            destination[destinationOffset] = this.toByte()
+            destination[destinationOffset + 1] = (this shr 8).toByte()
+            destination[destinationOffset + 2] = (this shr 16).toByte()
+            destination[destinationOffset + 3] = (this shr 24).toByte()
+        }
+    }
+}
+
+fun Int.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray {
+    val result = ByteArray(4)
+    copyInto(result, order = order)
+    return result
+}

src/commonMain/kotlin/com/infendro/bytes/int/Operator.kt

@@ -0,0 +1,5 @@
+package com.infendro.bytes.int
+
+operator fun Int.not(): Int {
+    return inv()
+}

src/commonMain/kotlin/com/infendro/bytes/intarray/Conversion.kt

@@ -0,0 +1,48 @@
+package com.infendro.bytes.intarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun IntArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length * 4)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 4)
+                val value = this[startIndex + i]
+                destination[offset] = (value shr 24).toByte()
+                destination[offset + 1] = (value shr 16).toByte()
+                destination[offset + 2] = (value shr 8).toByte()
+                destination[offset + 3] = value.toByte()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 4)
+                val value = this[startIndex + i]
+                destination[offset] = value.toByte()
+                destination[offset + 1] = (value shr 8).toByte()
+                destination[offset + 2] = (value shr 16).toByte()
+                destination[offset + 3] = (value shr 24).toByte()
+            }
+        }
+    }
+}
+
+fun IntArray.toByteArray(startIndex: Int = 0, endIndex: Int = size, order: ByteOrder = BIG_ENDIAN): ByteArray {
+    val length = endIndex - startIndex
+    val result = ByteArray(length * 4)
+    copyInto(result, startIndex = startIndex, endIndex = endIndex, order = order)
+    return result
+}

src/commonMain/kotlin/com/infendro/bytes/long/Conversion.kt

@@ -0,0 +1,38 @@
+package com.infendro.bytes.long
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun Long.copyInto(destination: ByteArray, destinationOffset: Int = 0, order: ByteOrder = BIG_ENDIAN) {
+    require(destinationOffset in 0..(destination.size - 8))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            destination[destinationOffset] = (this shr 56).toByte()
+            destination[destinationOffset + 1] = (this shr 48).toByte()
+            destination[destinationOffset + 2] = (this shr 40).toByte()
+            destination[destinationOffset + 3] = (this shr 32).toByte()
+            destination[destinationOffset + 4] = (this shr 24).toByte()
+            destination[destinationOffset + 5] = (this shr 16).toByte()
+            destination[destinationOffset + 6] = (this shr 8).toByte()
+            destination[destinationOffset + 7] = this.toByte()
+        }
+        LITTLE_ENDIAN -> {
+            destination[destinationOffset] = this.toByte()
+            destination[destinationOffset + 1] = (this shr 8).toByte()
+            destination[destinationOffset + 2] = (this shr 16).toByte()
+            destination[destinationOffset + 3] = (this shr 24).toByte()
+            destination[destinationOffset + 4] = (this shr 32).toByte()
+            destination[destinationOffset + 5] = (this shr 40).toByte()
+            destination[destinationOffset + 6] = (this shr 48).toByte()
+            destination[destinationOffset + 7] = (this shr 56).toByte()
+        }
+    }
+}
+
+fun Long.toByteArray(order: ByteOrder = BIG_ENDIAN): ByteArray {
+    val result = ByteArray(8)
+    copyInto(result, order = order)
+    return result
+}

src/commonMain/kotlin/com/infendro/bytes/long/Operator.kt

@@ -0,0 +1,5 @@
+package com.infendro.bytes.long
+
+operator fun Long.not(): Long {
+    return inv()
+}

src/commonMain/kotlin/com/infendro/bytes/longarray/Conversion.kt

@@ -0,0 +1,56 @@
+package com.infendro.bytes.longarray
+
+import com.infendro.bytes.ByteOrder
+import com.infendro.bytes.ByteOrder.BIG_ENDIAN
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+
+fun LongArray.copyInto(
+    destination: ByteArray,
+    destinationOffset: Int = 0,
+    startIndex: Int = 0,
+    endIndex: Int = size,
+    order: ByteOrder = BIG_ENDIAN,
+) {
+    val length = endIndex - startIndex
+    require(length >= 0)
+    require(startIndex in 0..(size - length))
+    require(destinationOffset in 0..(destination.size - (length * 8)))
+
+    when (order) {
+        BIG_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 8)
+                val value = this[startIndex + i]
+                destination[offset] = (value shr 56).toByte()
+                destination[offset + 1] = (value shr 48).toByte()
+                destination[offset + 2] = (value shr 40).toByte()
+                destination[offset + 3] = (value shr 32).toByte()
+                destination[offset + 4] = (value shr 24).toByte()
+                destination[offset + 5] = (value shr 16).toByte()
+                destination[offset + 6] = (value shr 8).toByte()
+                destination[offset + 7] = value.toByte()
+            }
+        }
+        LITTLE_ENDIAN -> {
+            repeat(length) { i ->
+                val offset = destinationOffset + (i * 8)
+                val value = this[startIndex + i]
+                destination[offset] = value.toByte()
+                destination[offset + 1] = (value shr 8).toByte()
+                destination[offset + 2] = (value shr 16).toByte()
+                destination[offset + 3] = (value shr 24).toByte()
+                destination[offset + 4] = (value shr 32).toByte()
+                destination[offset + 5] = (value shr 40).toByte()
+                destination[offset + 6] = (value shr 48).toByte()
+                destination[offset + 7] = (value shr 56).toByte()
+            }
+        }
+    }
+}
+
+fun LongArray.toByteArray(startIndex: Int = 0, endIndex: Int = size, order: ByteOrder = BIG_ENDIAN): ByteArray {
+    val length = endIndex - startIndex
+    val result = ByteArray(length * 8)
+    copyInto(result, startIndex = startIndex, endIndex = endIndex, order = order)
+    return result
+}

src/commonTest/kotlin/com/infendro/bytes/byte/Operator.kt

@@ -0,0 +1,13 @@
+package com.infendro.bytes.byte
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class ByteOperatorTest {
+    @Test
+    fun not() {
+        val expected = (-0x01).toByte()
+        val actual = !0x00.toByte()
+        assertEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/bytearray/Conversion.kt

@@ -0,0 +1,98 @@
+package com.infendro.bytes.bytearray
+
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+import kotlin.test.assertEquals
+
+class ByteArrayConversionTest {
+    @Test
+    fun toInt() {
+        val expected = 0x01234567
+        run {
+            val actual = byteArrayOf(0x01, 0x23, 0x45, 0x67).toInt()
+            assertEquals(expected, actual)
+        }
+        run {
+            val actual = byteArrayOf(0x67, 0x45, 0x23, 0x01).toInt(order = LITTLE_ENDIAN)
+            assertEquals(expected, actual)
+        }
+    }
+
+    @Test
+    fun toLong() {
+        val expected = 0x0123456789abcdefL
+        run {
+            val actual = byteArrayOf(0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11).toLong()
+            assertEquals(expected, actual)
+        }
+        run {
+            val actual = byteArrayOf(-0x11, -0x33, -0x55, -0x77, 0x67, 0x45, 0x23, 0x01).toLong(order = LITTLE_ENDIAN)
+            assertEquals(expected, actual)
+        }
+    }
+
+    @Test
+    fun copyIntoIntArray() {
+        val expected = intArrayOf(0, 0x01234567, 0x01234567)
+        val actual = IntArray(3).also { array ->
+            val bytes = byteArrayOf(
+                0x01, 0x23, 0x45, 0x67,
+                0x01, 0x23, 0x45, 0x67,
+            )
+            bytes.copyInto(array, 1)
+        }
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun toIntArray() {
+        val expected = intArrayOf(0x01234567, 0x67452301)
+        run {
+            val actual = byteArrayOf(
+                0x01, 0x23, 0x45, 0x67,
+                0x67, 0x45, 0x23, 0x01,
+            ).toIntArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = byteArrayOf(
+                0x67, 0x45, 0x23, 0x01,
+                0x01, 0x23, 0x45, 0x67,
+            ).toIntArray(order = LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+
+    @Test
+    fun copyIntoLongArray() {
+        val expected = longArrayOf(0, 0x0123456789abcdefL, 0x0123456789abcdefL)
+        val actual = LongArray(3).also { array ->
+            val bytes = byteArrayOf(
+                0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11,
+                0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11,
+            )
+            bytes.copyInto(array, 1)
+        }
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun toLongArray() {
+        val expected = longArrayOf(0x0123456789abcdefL, -0x1032547698badcffL)
+        run {
+            val actual = byteArrayOf(
+                0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11,
+                -0x11, -0x33, -0x55, -0x77, 0x67, 0x45, 0x23, 0x01,
+            ).toLongArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = byteArrayOf(
+                -0x11, -0x33, -0x55, -0x77, 0x67, 0x45, 0x23, 0x01,
+                0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11,
+            ).toLongArray(order = LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/bytearray/Operator.kt

@@ -0,0 +1,55 @@
+package com.infendro.bytes.bytearray
+
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class ByteArrayOperatorTest {
+    @Test
+    fun and() {
+        val expected = byteArrayOf(0x18, 0x00)
+        val actual = byteArrayOf(0x5C, 0x70) and byteArrayOf(0x3A, 0x0F)
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun andByte() {
+        val expected = byteArrayOf(0x0C, 0x00)
+        val actual = byteArrayOf(0x5C, 0x70) and 0x0F
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun or() {
+        val expected = byteArrayOf(0x7E, 0x7F)
+        val actual = byteArrayOf(0x5C, 0x70) or byteArrayOf(0x3A, 0x0F)
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun orByte() {
+        val expected = byteArrayOf(0x5F, 0x7F)
+        val actual = byteArrayOf(0x5C, 0x70) or 0x0F
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun xor() {
+        val expected = byteArrayOf(0x66, 0x7F)
+        val actual = byteArrayOf(0x5C, 0x70) xor byteArrayOf(0x3A, 0x0F)
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun xorByte() {
+        val expected = byteArrayOf(0x53, 0x7F)
+        val actual = byteArrayOf(0x5C, 0x70) xor 0x0F
+        assertContentEquals(expected, actual)
+    }
+
+    @Test
+    fun not() {
+        val expected = byteArrayOf(-0x01, -0x20)
+        val actual = !byteArrayOf(0x00, 0x1F)
+        assertContentEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/int/Conversion.kt

@@ -0,0 +1,20 @@
+package com.infendro.bytes.int
+
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class IntConversionTest {
+    @Test
+    fun toByteArray() {
+        val expected = byteArrayOf(0x01, 0x23, 0x45, 0x67)
+        run {
+            val actual = 0x01234567.toByteArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = 0x67452301.toByteArray(LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/int/Operator.kt

@@ -0,0 +1,13 @@
+package com.infendro.bytes.int
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class IntOperatorTest {
+    @Test
+    fun not() {
+        val expected = -0x00000001
+        val actual = !0x00000000
+        assertEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/intarray/Conversion.kt

@@ -0,0 +1,23 @@
+package com.infendro.bytes.intarray
+
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class IntArrayConversionTest {
+    @Test
+    fun toByteArray() {
+        val expected = byteArrayOf(
+            0x01, 0x23, 0x45, 0x67,
+            0x67, 0x45, 0x23, 0x01,
+        )
+        run {
+            val actual = intArrayOf(0x01234567, 0x67452301).toByteArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = intArrayOf(0x67452301, 0x01234567).toByteArray(order = LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/long/Conversion.kt

@@ -0,0 +1,20 @@
+package com.infendro.bytes.long
+
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class LongConversionTest {
+    @Test
+    fun toByteArray() {
+        val expected = byteArrayOf(0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11)
+        run {
+            val actual = 0x0123456789abcdefL.toByteArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = (-0x1032547698badcffL).toByteArray(LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/long/Operator.kt

@@ -0,0 +1,13 @@
+package com.infendro.bytes.long
+
+import kotlin.test.Test
+import kotlin.test.assertEquals
+
+class LongOperatorTest {
+    @Test
+    fun not() {
+        val expected = -0x0000000000000001L
+        val actual = !0x0000000000000000L
+        assertEquals(expected, actual)
+    }
+}

src/commonTest/kotlin/com/infendro/bytes/longarray/Conversion.kt

@@ -0,0 +1,23 @@
+package com.infendro.bytes.longarray
+
+import com.infendro.bytes.ByteOrder.LITTLE_ENDIAN
+import kotlin.test.Test
+import kotlin.test.assertContentEquals
+
+class LongArrayConversionTest {
+    @Test
+    fun toByteArray() {
+        val expected = byteArrayOf(
+            0x01, 0x23, 0x45, 0x67, -0x77, -0x55, -0x33, -0x11,
+            -0x11, -0x33, -0x55, -0x77, 0x67, 0x45, 0x23, 0x01,
+        )
+        run {
+            val actual = longArrayOf(0x0123456789abcdefL, -0x1032547698badcffL).toByteArray()
+            assertContentEquals(expected, actual)
+        }
+        run {
+            val actual = longArrayOf(-0x1032547698badcffL, 0x0123456789abcdefL).toByteArray(order = LITTLE_ENDIAN)
+            assertContentEquals(expected, actual)
+        }
+    }
+}