1 files changed, 79 insertions, 0 deletions
diff --git a/include/engine/input.h b/include/engine/input.h
new file mode 100644
index 0000000..d200e62
--- /dev/null
+++ b/include/engine/input.h
@@ -0,0 +1,79 @@
+#ifndef INPUT_H
+#define INPUT_H
+
+#include <engine/types.h>
+
+typedef void input_callback_t(void*);
+typedef i32 scancode_t;
+
+typedef enum InputType {
+  InputType_error = 0,
+  InputType_action,
+  InputType_state,
+  InputType_range, /* TBD */
+} InputType;
+
+typedef union action_t {
+  InputType type;
+
+  struct {
+    InputType type;
+    input_callback_t* callback;
+    const char* callback_str;
+  } action;
+
+  struct {
+    InputType type;
+    input_callback_t* activate;
+    input_callback_t* deactivate;
+    const char* activate_str;
+    const char* deactivate_str;
+  } state;
+} action_t;
+
+typedef struct binding_t {
+  action_t action;
+
+  // Change type depending on input handling back-end. like u16 for GLFW_KEY
+  //enum SDL_Scancode keycode;
+  scancode_t scancode;
+  scancode_t scancode_alt;
+
+  u64 since_last_activation;
+} binding_t;
+
+typedef struct i_ctx {
+	binding_t* bindings;
+	isize len;
+} i_ctx;
+
+void i_flush_bindings(usize numcalls, void* state_mem, input_callback_t* c[]);
+action_t i_get_action(const i_ctx *ctx, u32 time, scancode_t scancode);
+
+#define BindAction(key, altkey, f_action) \
+  (binding_t){\
+  .action = (action_t){.action = {\
+		.type = InputType_action,\
+		.callback     = (input_callback_t*)&f_action,\
+		.callback_str = #f_action,\
+	}},\
+	.scancode = key,\
+	.scancode_alt = altkey,\
+  .since_last_activation = 0\
+}
+
+#define BindState(key, altkey, f_activate, f_deactivate) \
+  (binding_t){\
+  .action = (action_t){.state = {\
+		.type = InputType_state,\
+    .activate   = (input_callback_t*)&f_activate,\
+    .deactivate = (input_callback_t*)&f_deactivate,\
+    .activate_str   = #f_activate,\
+    .deactivate_str = #f_deactivate,\
+	}},\
+	.scancode = key,\
+	.scancode_alt = altkey,\
+  .since_last_activation = 0\
+}
+
+#endif