feat/savestates: Add write_bin_file util function

Former-commit-id: 88e12df1d8a88ad97756e943b4b959f73bb99c35

src/lib.rs

@@ -65,6 +65,6 @@ pub mod prelude {
     pub use super::core::{GBAError, GBAResult, GameBoyAdvance};
     #[cfg(feature = "debugger")]
     pub use super::debugger::Debugger;
-    pub use super::util::read_bin_file;
+    pub use super::util::{read_bin_file, write_bin_file};
     pub use super::{AudioInterface, InputInterface, VideoInterface};
 }

src/util.rs

@@ -11,6 +11,13 @@ pub fn read_bin_file(filename: &Path) -> io::Result<Vec<u8>> {
     Ok(buf)
 }
 
+pub fn write_bin_file(filename: &Path, data: &Vec<u8>) -> io::Result<()> {
+    let mut f = File::create(filename)?;
+    f.write_all(data)?;
+
+    Ok(())
+}
+
 pub struct FpsCounter {
     count: u32,
     timer: time::Instant,