1 files changed, 37 insertions, 0 deletions
diff --git a/src/android/app/src/main/java/org/citra/citra_emu/utils/FileUtil.java b/src/android/app/src/main/java/org/citra/citra_emu/utils/FileUtil.java
new file mode 100644
index 000000000..f9025171b
--- /dev/null
+++ b/src/android/app/src/main/java/org/citra/citra_emu/utils/FileUtil.java
@@ -0,0 +1,37 @@
+package org.citra.citra_emu.utils;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.IOException;
+import java.io.InputStream;
+
+public class FileUtil {
+    public static byte[] getBytesFromFile(File file) throws IOException {
+        final long length = file.length();
+
+        // You cannot create an array using a long type.
+        if (length > Integer.MAX_VALUE) {
+            // File is too large
+            throw new IOException("File is too large!");
+        }
+
+        byte[] bytes = new byte[(int) length];
+
+        int offset = 0;
+        int numRead;
+
+        try (InputStream is = new FileInputStream(file)) {
+            while (offset < bytes.length
+                    && (numRead = is.read(bytes, offset, bytes.length - offset)) >= 0) {
+                offset += numRead;
+            }
+        }
+
+        // Ensure all the bytes have been read in
+        if (offset < bytes.length) {
+            throw new IOException("Could not completely read file " + file.getName());
+        }
+
+        return bytes;
+    }
+}