From e2b532c9560fa2772e2fee102da0b4e0dc57a845 Mon Sep 17 00:00:00 2001
From: KikooDX <kikoodx@paranoici.org>
Date: Thu, 23 Dec 2021 11:52:37 +0100
Subject: [PATCH] save replay

---
 CMakeLists.txt |  2 +-
 inc/conf.h     |  1 +
 inc/input.h    |  6 ++++++
 src/input.c    | 31 +++++++++++++++++++++++++++++++
 src/main.c     |  2 ++
 5 files changed, 41 insertions(+), 1 deletion(-)

diff --git a/CMakeLists.txt b/CMakeLists.txt
index 6d7ee72..4a626ff 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -5,7 +5,7 @@ project(JTMM2 C)
 include(GenerateG3A)
 include(Fxconv)
 
-find_package(Gint 2.6.0 REQUIRED)
+find_package(Gint 2.6.0 REQUIRED) # dev branch
 
 include_directories(inc)
 
diff --git a/inc/conf.h b/inc/conf.h
index 85f169c..895e0aa 100644
--- a/inc/conf.h
+++ b/inc/conf.h
@@ -26,3 +26,4 @@
 #define MISSILE_ACCEL       0.06f
 #define MISSILE_FRICTION    (MISSILE_ACCEL / MISSILE_MAX_SPEED)
 #define MISSILE_COOLDOWN    (TARGET_FPS / 2)
+#define REPLAY_SIZE         18000 /* 5 minutes */
diff --git a/inc/input.h b/inc/input.h
index 2896117..4495338 100644
--- a/inc/input.h
+++ b/inc/input.h
@@ -1,4 +1,5 @@
 #pragma once
+#include "conf.h"
 
 enum Key {
 	K_LEFT,
@@ -17,13 +18,18 @@ enum Key {
 };
 enum KeyState { KS_UP, KS_DOWN, KS_PRESS };
 
+typedef unsigned char PackedFrame;
+
 struct Input {
 	enum Key keys[K_COUNT];
 	enum KeyState states[K_COUNT];
+	int replay_cursor;
+	PackedFrame replay[REPLAY_SIZE];
 };
 
 void input_init(void);
 void input_update(void);
+void input_write_replay(void);
 
 int input_down(enum Key);
 int input_pressed(enum Key);
diff --git a/src/input.c b/src/input.c
index 303f67a..17ede90 100644
--- a/src/input.c
+++ b/src/input.c
@@ -1,11 +1,16 @@
 #include "input.h"
+#include <fcntl.h>
 #include <gint/keyboard.h>
+#include <sys/stat.h>
+#include <unistd.h>
 
 static struct Input input;
 static const int default_map[K_COUNT] = {
     KEY_LEFT, KEY_RIGHT, KEY_UP, KEY_DOWN, KEY_SHIFT, KEY_ALPHA,
     KEY_EXIT, KEY_TAN,   KEY_F3, KEY_F2,   KEY_F1,    KEY_F6};
 
+static PackedFrame pack_frame(void);
+
 void
 input_init(void)
 {
@@ -15,6 +20,8 @@ input_init(void)
 		input.keys[i] = default_map[i];
 		input.states[i] = KS_UP;
 	}
+	i = REPLAY_SIZE;
+	input.replay_cursor = 0;
 }
 
 void
@@ -28,6 +35,20 @@ input_update(void)
 		                      ? (kdown ? KS_PRESS : KS_UP)
 		                      : (kdown ? KS_DOWN : KS_UP);
 	}
+	input.replay[input.replay_cursor++] = pack_frame();
+	if (input.replay_cursor >= REPLAY_SIZE)
+		input.replay_cursor = REPLAY_SIZE - 1;
+}
+
+void
+input_write_replay(void)
+{
+	const int fd = open("jtmm2.rep", O_WRONLY | O_CREAT | O_TRUNC);
+	if (fd != -1) {
+		write(fd, input.replay,
+		      input.replay_cursor * sizeof(PackedFrame));
+		close(fd);
+	}
 }
 
 int
@@ -47,3 +68,13 @@ input_up(enum Key k)
 {
 	return input.states[k] == KS_UP;
 }
+
+static PackedFrame
+pack_frame(void)
+{
+	PackedFrame r = 0;
+	int i = K_EXIT;
+	while (i-- > 0)
+		r |= input_down(i) << i;
+	return r;
+}
diff --git a/src/main.c b/src/main.c
index d912f04..4937703 100644
--- a/src/main.c
+++ b/src/main.c
@@ -8,6 +8,7 @@
 #include "util.h"
 #include <gint/cpu.h>
 #include <gint/display.h>
+#include <gint/gint.h>
 #include <gint/timer.h>
 
 static struct Player player;
@@ -72,6 +73,7 @@ deinit(void)
 {
 	level_deinit();
 	missile_manager_free();
+	gint_world_switch(GINT_CALL(input_write_replay));
 
 	timer_stop(timer);
 }