From bd2793b5b4768227187fdbf3c31cbd9a5b668964 Mon Sep 17 00:00:00 2001
From: soywiz <soywiz@gmail.com>
Date: Thu, 25 Jul 2024 08:08:35 +0200
Subject: [PATCH] Fixes native

---
 .../src/korlibs/memory/_Memory_Internal.kt    | 24 +++++++++++++++++++
 .../korlibs/memory/Buffer.native.kt           |  1 +
 2 files changed, 25 insertions(+)

diff --git a/korlibs-memory/src/korlibs/memory/_Memory_Internal.kt b/korlibs-memory/src/korlibs/memory/_Memory_Internal.kt
index 80dca5d..537b2f9 100644
--- a/korlibs-memory/src/korlibs/memory/_Memory_Internal.kt
+++ b/korlibs-memory/src/korlibs/memory/_Memory_Internal.kt
@@ -21,3 +21,27 @@ internal fun Int.extractByte(offset: Int): Byte = (this ushr offset).toByte()
 
 /** Takes n[bits] of [this] [Int], and extends the last bit, creating a plain [Int] in one's complement */
 internal fun Int.signExtend(bits: Int): Int = (this shl (32 - bits)) shr (32 - bits) // Int.SIZE_BITS
+
+/** Reverses the bytes of [this] [Short]: AABB -> BBAA */
+internal fun Short.reverseBytes(): Short {
+    val low = ((this.toInt() ushr 0) and 0xFF)
+    val high = ((this.toInt() ushr 8) and 0xFF)
+    return ((high and 0xFF) or (low shl 8)).toShort()
+}
+
+/** Reverses the bytes of [this] [Int]: AABBCCDD -> DDCCBBAA */
+internal fun Int.reverseBytes(): Int {
+    val v0 = ((this ushr 0) and 0xFF)
+    val v1 = ((this ushr 8) and 0xFF)
+    val v2 = ((this ushr 16) and 0xFF)
+    val v3 = ((this ushr 24) and 0xFF)
+    return (v0 shl 24) or (v1 shl 16) or (v2 shl 8) or (v3 shl 0)
+}
+
+/** Reverses the bytes of [this] [Long]: AABBCCDDEEFFGGHH -> HHGGFFEEDDCCBBAA */
+internal fun Long.reverseBytes(): Long {
+    val v0 = (this ushr 0).toInt().reverseBytes().toLong() and 0xFFFFFFFFL
+    val v1 = (this ushr 32).toInt().reverseBytes().toLong() and 0xFFFFFFFFL
+    return (v0 shl 32) or (v1 shl 0)
+}
+
diff --git a/korlibs-memory/src@native/korlibs/memory/Buffer.native.kt b/korlibs-memory/src@native/korlibs/memory/Buffer.native.kt
index 08a0e91..9ddb3b9 100644
--- a/korlibs-memory/src@native/korlibs/memory/Buffer.native.kt
+++ b/korlibs-memory/src@native/korlibs/memory/Buffer.native.kt
@@ -2,6 +2,7 @@
 
 package korlibs.memory
 
+import korlibs.memory.internal.*
 import kotlinx.cinterop.*
 import platform.posix.*
 import kotlin.experimental.*