From 7d0bf7b831b1ec14037db687f0e53e2998d5b2a3 Mon Sep 17 00:00:00 2001
From: Konstantin <konstantin.tskhovrebov@jetbrains.com>
Date: Tue, 27 Aug 2024 16:02:36 +0200
Subject: [PATCH] Fix a resource reading on iOS 12 (#5123)

Use deprecated `seekToFileOffset` on iOS 12 to fix a crash on old Apple
devices

Fixes https://youtrack.jetbrains.com/issue/CMP-5967

## Release Notes
### Fixes - Resources
- _(prerelease fix)_ Fix a resource reading on iOS 12
---
 .../compose/resources/ResourceReader.ios.kt   | 31 +++++++++++++++++--
 1 file changed, 29 insertions(+), 2 deletions(-)

diff --git a/components/resources/library/src/iosMain/kotlin/org/jetbrains/compose/resources/ResourceReader.ios.kt b/components/resources/library/src/iosMain/kotlin/org/jetbrains/compose/resources/ResourceReader.ios.kt
index 0da7725bc3..5629c5bf2d 100644
--- a/components/resources/library/src/iosMain/kotlin/org/jetbrains/compose/resources/ResourceReader.ios.kt
+++ b/components/resources/library/src/iosMain/kotlin/org/jetbrains/compose/resources/ResourceReader.ios.kt
@@ -1,10 +1,29 @@
 package org.jetbrains.compose.resources
 
+import kotlinx.cinterop.BetaInteropApi
+import kotlinx.cinterop.ObjCObjectVar
 import kotlinx.cinterop.addressOf
+import kotlinx.cinterop.alloc
+import kotlinx.cinterop.memScoped
+import kotlinx.cinterop.ptr
 import kotlinx.cinterop.usePinned
-import platform.Foundation.*
+import kotlinx.cinterop.value
+import org.jetbrains.skiko.OS
+import org.jetbrains.skiko.OSVersion
+import org.jetbrains.skiko.available
+import platform.Foundation.NSBundle
+import platform.Foundation.NSData
+import platform.Foundation.NSError
+import platform.Foundation.NSFileHandle
+import platform.Foundation.NSFileManager
+import platform.Foundation.NSURL
+import platform.Foundation.closeFile
+import platform.Foundation.fileHandleForReadingAtPath
+import platform.Foundation.readDataOfLength
+import platform.Foundation.seekToFileOffset
 import platform.posix.memcpy
 
+@OptIn(BetaInteropApi::class)
 internal actual fun getPlatformResourceReader(): ResourceReader = object : ResourceReader {
     override suspend fun read(path: String): ByteArray {
         val data = readData(getPathInBundle(path))
@@ -30,7 +49,15 @@ internal actual fun getPlatformResourceReader(): ResourceReader = object : Resou
 
     private fun readData(path: String, offset: Long, size: Long): NSData {
         val fileHandle = NSFileHandle.fileHandleForReadingAtPath(path) ?: throw MissingResourceException(path)
-        fileHandle.seekToOffset(offset.toULong(), null)
+        if (available(OS.Ios to OSVersion(major = 13))) {
+            memScoped {
+                val error = alloc<ObjCObjectVar<NSError?>>()
+                fileHandle.seekToOffset(offset.toULong(), error.ptr)
+                error.value?.let { err -> error(err.localizedDescription) }
+            }
+        } else {
+            fileHandle.seekToFileOffset(offset.toULong())
+        }
         val result = fileHandle.readDataOfLength(size.toULong())
         fileHandle.closeFile()
         return result