From 83ace9bf3e697ab65393f0ddb9370de5b38382a4 Mon Sep 17 00:00:00 2001
From: Alexey Andreev <konsoletyper@gmail.com>
Date: Tue, 5 Sep 2023 09:26:22 +0200
Subject: [PATCH] classlib: fix ByteBuffer.putLong implementation

Fix #737
---
 .../org/teavm/classlib/java/nio/TByteBufferImpl.java |  8 ++++----
 .../org/teavm/classlib/java/nio/ByteBufferTest.java  | 12 ++++++++++++
 2 files changed, 16 insertions(+), 4 deletions(-)

diff --git a/classlib/src/main/java/org/teavm/classlib/java/nio/TByteBufferImpl.java b/classlib/src/main/java/org/teavm/classlib/java/nio/TByteBufferImpl.java
index 24f729b7f..e24b2792d 100644
--- a/classlib/src/main/java/org/teavm/classlib/java/nio/TByteBufferImpl.java
+++ b/classlib/src/main/java/org/teavm/classlib/java/nio/TByteBufferImpl.java
@@ -486,10 +486,10 @@ class TByteBufferImpl extends TByteBuffer {
             array[start + index + 1] = (byte) (value >> 8);
             array[start + index + 2] = (byte) (value >> 16);
             array[start + index + 3] = (byte) (value >> 24);
-            array[start + index + 4] = (byte) (value >> 24);
-            array[start + index + 5] = (byte) (value >> 24);
-            array[start + index + 6] = (byte) (value >> 24);
-            array[start + index + 7] = (byte) (value >> 24);
+            array[start + index + 4] = (byte) (value >> 32);
+            array[start + index + 5] = (byte) (value >> 40);
+            array[start + index + 6] = (byte) (value >> 48);
+            array[start + index + 7] = (byte) (value >> 56);
         }
         return this;
     }
diff --git a/tests/src/test/java/org/teavm/classlib/java/nio/ByteBufferTest.java b/tests/src/test/java/org/teavm/classlib/java/nio/ByteBufferTest.java
index b4dbe7264..3723fe57c 100644
--- a/tests/src/test/java/org/teavm/classlib/java/nio/ByteBufferTest.java
+++ b/tests/src/test/java/org/teavm/classlib/java/nio/ByteBufferTest.java
@@ -24,6 +24,7 @@ import static org.junit.Assert.fail;
 import java.nio.BufferOverflowException;
 import java.nio.BufferUnderflowException;
 import java.nio.ByteBuffer;
+import java.nio.ByteOrder;
 import java.nio.InvalidMarkException;
 import java.nio.ReadOnlyBufferException;
 import org.junit.Test;
@@ -715,6 +716,17 @@ public class ByteBufferTest {
         } catch (IndexOutOfBoundsException e) {
             // expected
         }
+
+        buffer = ByteBuffer.wrap(array).order(ByteOrder.LITTLE_ENDIAN);
+        buffer.putLong(1, 0x2324252627282930L);
+        assertThat(buffer.get(1), is((byte) 0x30));
+        assertThat(buffer.get(2), is((byte) 0x29));
+        assertThat(buffer.get(3), is((byte) 0x28));
+        assertThat(buffer.get(4), is((byte) 0x27));
+        assertThat(buffer.get(5), is((byte) 0x26));
+        assertThat(buffer.get(6), is((byte) 0x25));
+        assertThat(buffer.get(7), is((byte) 0x24));
+        assertThat(buffer.get(8), is((byte) 0x23));
     }
 
     @Test