From 531240e94e22ce08f3d33b48d3a3895697f67e86 Mon Sep 17 00:00:00 2001
From: Theron <tspiegl@gmail.com>
Date: Fri, 28 Feb 2020 19:47:46 -0600
Subject: [PATCH] experimenting with serde

---
 Cargo.toml     |  1 +
 src/cpu/mod.rs | 31 +++++++++++++++++++++++++++++--
 2 files changed, 30 insertions(+), 2 deletions(-)

diff --git a/Cargo.toml b/Cargo.toml
index 4f48ada..1a87293 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -6,6 +6,7 @@ edition = "2018"
 
 [dependencies]
 sdl2 = { version = "0.33", features = ["bundled", "static-link"] }
+serde = { version = "1.0.104", features = ["derive"] }
 cpuprofiler = "0.0.3"
 
 [profile.release]
diff --git a/src/cpu/mod.rs b/src/cpu/mod.rs
index 06df672..23e0dd6 100644
--- a/src/cpu/mod.rs
+++ b/src/cpu/mod.rs
@@ -4,6 +4,8 @@ mod utility;
 
 use std::cell::RefCell;
 use std::rc::Rc;
+use serde::{Serialize, Deserialize};
+use serde::ser::{Serializer, SerializeStruct};
 use crate::cartridge::Mapper;
 
 // RAM locations
@@ -21,7 +23,7 @@ const DECIMAL_FLAG: u8           = 1 << 3;
 const OVERFLOW_FLAG: u8          = 1 << 6;
 const NEGATIVE_FLAG: u8          = 1 << 7;
 
-#[derive(Clone, Copy, Debug)]
+#[derive(Clone, Copy, Debug, Serialize, Deserialize)]
 pub enum Mode {
     ABS, ABX, ABY, ACC,
     IMM, IMP, IDX, IND,
@@ -51,7 +53,7 @@ impl Mode {
     }
 }
 
-
+// #[derive(Serialize, Deserialize, Debug)]
 pub struct Cpu {
     mem: Vec<u8>, // CPU's RAM, $0000-$1FFF
     A: u8,        // accumulator
@@ -64,6 +66,7 @@ pub struct Cpu {
     clock: u64, // number of ticks in current cycle
     delay: usize, // for skipping cycles during OAM DMA
 
+    // #[serde(skip_serializing)]
     mapper: Rc<RefCell<dyn Mapper>>, // cartridge data
     pub ppu: super::Ppu,
     pub apu: super::Apu,
@@ -285,6 +288,30 @@ impl Cpu {
     }
 }
 
+
+impl Serialize for Cpu {
+    fn serialize<S>(&self, serializer: S) -> Result<S::Ok, S::Error>
+    where
+        S: Serializer,
+    {
+        let mut state = serializer.serialize_struct("Cpu", 13)?;
+        state.serialize_field("mem", &self.mem)?;
+        state.serialize_field("A", &self.A)?;
+        state.serialize_field("X", &self.X)?;
+        state.serialize_field("Y", &self.Y)?;
+        state.serialize_field("PC", &self.PC)?;
+        state.serialize_field("S", &self.S)?;
+        state.serialize_field("P", &self.P)?;
+        state.serialize_field("clock", &self.clock)?;
+        state.serialize_field("delay", &self.delay)?;
+        state.serialize_field("strobe", &self.strobe)?;
+        state.serialize_field("button_states", &self.button_states)?;
+        state.serialize_field("button_number", &self.button_number)?;
+        state.serialize_field("mode_table", &self.mode_table)?;
+        state.end()
+    }
+}
+
 /*
 Address range 	Size 	Device
 $0000-$07FF 	$0800 	2KB internal RAM