1 files changed, 65 insertions, 0 deletions
diff --git a/src/main/java/io/polyfrost/oneconfig/lwjgl/IOUtil.java b/src/main/java/io/polyfrost/oneconfig/lwjgl/IOUtil.java
new file mode 100644
index 0000000..d0f54f7
--- /dev/null
+++ b/src/main/java/io/polyfrost/oneconfig/lwjgl/IOUtil.java
@@ -0,0 +1,65 @@
+package io.polyfrost.oneconfig.lwjgl;
+
+import java.io.IOException;
+import java.io.InputStream;
+import java.nio.Buffer;
+import java.nio.ByteBuffer;
+import java.nio.channels.Channels;
+import java.nio.channels.ReadableByteChannel;
+import java.nio.channels.SeekableByteChannel;
+import java.nio.file.Files;
+import java.nio.file.Path;
+import java.nio.file.Paths;
+
+import static org.lwjgl.BufferUtils.createByteBuffer;
+import static org.lwjgl.system.MemoryUtil.memSlice;
+
+final class IOUtil {
+
+    private IOUtil() {
+    }
+
+    private static ByteBuffer resizeBuffer(ByteBuffer buffer, int newCapacity) {
+        ByteBuffer newBuffer = createByteBuffer(newCapacity);
+        buffer.flip();
+        newBuffer.put(buffer);
+        return newBuffer;
+    }
+
+     static ByteBuffer resourceToByteBuffer(String resource, int bufferSize) throws IOException {
+        ByteBuffer buffer;
+
+        Path path = Paths.get(resource);
+        if (Files.isReadable(path)) {
+            try (SeekableByteChannel fc = Files.newByteChannel(path)) {
+                buffer = createByteBuffer((int)fc.size() + 1);
+                while (fc.read(buffer) != -1) {
+                    //noinspection UnnecessarySemicolon
+                    ;
+                }
+            }
+        } else {
+            try (
+                    InputStream source = IOUtil.class.getResourceAsStream(resource);
+                    ReadableByteChannel rbc = Channels.newChannel(source)
+            ) {
+                buffer = createByteBuffer(bufferSize);
+
+                while (true) {
+                    int bytes = rbc.read(buffer);
+                    if (bytes == -1) {
+                        break;
+                    }
+                    if (buffer.remaining() == 0) {
+                        buffer = resizeBuffer(buffer, buffer.capacity() * 3 / 2); // 50%
+                    }
+                }
+            }
+        }
+
+        //noinspection RedundantCast
+        ((Buffer) buffer).flip();
+        return memSlice(buffer);
+    }
+
+}
+\ No newline at end of file