fix: use variable length encoding instead short for offsets (can overflow) (#1489)

2022-05-22 14:21:25 +01:00
parent e07332d49a
commit 6448f0e32b
10 changed files with 130 additions and 49 deletions
@@ -0,0 +1,40 @@
+package jadx.gui.utils.codecache.disk.adapters;
+
+import java.io.ByteArrayInputStream;
+import java.io.ByteArrayOutputStream;
+import java.io.DataInput;
+import java.io.DataInputStream;
+import java.io.DataOutputStream;
+import java.io.IOException;
+
+import org.junit.jupiter.api.Test;
+
+import static org.assertj.core.api.Assertions.assertThat;
+
+class DataAdapterHelperTest {
+
+	@Test
+	void uvInt() throws IOException {
+		checkUVIntFor(0);
+		checkUVIntFor(7);
+		checkUVIntFor(0x7f);
+		checkUVIntFor(0x80);
+		checkUVIntFor(0x256);
+		checkUVIntFor(Byte.MAX_VALUE);
+		checkUVIntFor(Short.MAX_VALUE);
+		checkUVIntFor(Integer.MAX_VALUE);
+	}
+
+	private void checkUVIntFor(int val) throws IOException {
+		assertThat(writeReadUVInt(val)).isEqualTo(val);
+	}
+
+	private int writeReadUVInt(int val) throws IOException {
+		ByteArrayOutputStream byteOut = new ByteArrayOutputStream();
+		DataOutputStream out = new DataOutputStream(byteOut);
+		DataAdapterHelper.writeUVInt(out, val);
+
+		DataInput in = new DataInputStream(new ByteArrayInputStream(byteOut.toByteArray()));
+		return DataAdapterHelper.readUVInt(in);
+	}
+}