Modifications to read_from

Signed-off-by: UpeksheJay <[email protected]>

ext/nio4r/bytebuffer.c

@@ -213,11 +213,25 @@ static VALUE NIO_ByteBuffer_writeTo(VALUE self, VALUE io){
     return self;
 }
 
-static VALUE NIO_ByteBuffer_readFrom(VALUE self, VALUE file){
+static VALUE NIO_ByteBuffer_readFrom(VALUE self, VALUE io){
 	struct NIO_ByteBuffer *byteBuffer;
 	Data_Get_Struct(self, struct NIO_ByteBuffer, byteBuffer);
 	int size = byteBuffer->limit + 1 - byteBuffer->position;
 
+    #if HAVE_RB_IO_T
+        rb_io_t        *fptr;
+    #else
+        OpenFile       *fptr;
+    #endif
+
+    GetOpenFile(rb_convert_type(io, T_FILE, "IO", "to_io"), fptr);
+    rb_io_set_nonblock(fptr);
+    while(NIO_ByteBuffer_hasRemaining(self) == Qtrue){
+        char* nextByte;
+        read(FPTR_TO_FD(fptr), &nextByte, 1);
+        VALUE byte = rb_str_new2(nextByte);
+        NIO_ByteBuffer_put(self, byte);
+    }
     return self;
 }