board/sg-reader.c: Streamline further

Remove remaining pointless boilerplate, turn it into a free-
standing hook, since its aimeio.dll dependency forces it to be a
singleton anyway.

cardhook/_com12.c

@@ -1,37 +0,0 @@
-#include <windows.h>
-
-#include <assert.h>
-
-#include "board/sg-reader.h"
-
-#include "cardhook/_com12.h"
-
-#include "hook/iohook.h"
-
-static HRESULT com12_handle_irp(struct irp *irp);
-
-static struct sg_reader com12_reader;
-
-HRESULT com12_hook_init(void)
-{
-    HRESULT hr;
-
-    hr = sg_reader_init(&com12_reader, 12);
-
-    if (FAILED(hr)) {
-        return hr;
-    }
-
-    return iohook_push_handler(com12_handle_irp);
-}
-
-static HRESULT com12_handle_irp(struct irp *irp)
-{
-    assert(irp != NULL);
-
-    if (!sg_reader_match_irp(&com12_reader, irp)) {
-        return iohook_invoke_next(irp);
-    }
-
-    return sg_reader_handle_irp(&com12_reader, irp);
-}

cardhook/_com12.h

@@ -1,5 +0,0 @@
-#pragma once
-
-#include <windows.h>
-
-HRESULT com12_hook_init(void);

cardhook/dllmain.c

@@ -1,6 +1,6 @@
 #include <windows.h>
 
-#include "cardhook/_com12.h"
+#include "board/sg-reader.h"
 
 #include "hook/process.h"
 
@@ -15,9 +15,10 @@ static DWORD CALLBACK app_pre_startup(void)
 {
     dprintf("--- Begin %s ---\n", __func__);
 
-    serial_hook_init();
     spike_hook_init("cardspike.txt");
-    com12_hook_init();
+
+    serial_hook_init();
+    sg_reader_hook_init(12);
 
     dprintf("---  End  %s ---\n", __func__);
 

cardhook/meson.build

@@ -14,7 +14,6 @@ shared_library(
         util_lib,
     ],
     sources : [
-        '_com12.c',
         'dllmain.c',
     ],
 )