From eedfe8060a20c8a9120ff8cab55110a1e2470887 Mon Sep 17 00:00:00 2001
From: gameblabla <gameblabla@users.noreply.github.com>
Date: Wed, 18 Aug 2021 20:22:43 +0000
Subject: [PATCH] Add internal database for problematic games. (#182)

---
 Makefile               |  2 +-
 libpcsxcore/database.c | 36 ++++++++++++++++++++++++++++++++++++
 libpcsxcore/database.h |  6 ++++++
 libpcsxcore/misc.c     |  3 +++
 libpcsxcore/sio.h      |  1 +
 5 files changed, 47 insertions(+), 1 deletion(-)
 create mode 100644 libpcsxcore/database.c
 create mode 100644 libpcsxcore/database.h

diff --git a/Makefile b/Makefile
index c63fd1f5..29d24184 100644
--- a/Makefile
+++ b/Makefile
@@ -39,7 +39,7 @@ CFLAGS += -DPCNT
 endif
 
 # core
-OBJS += libpcsxcore/cdriso.o libpcsxcore/cdrom.o libpcsxcore/cheat.o libpcsxcore/debug.o \
+OBJS += libpcsxcore/cdriso.o libpcsxcore/cdrom.o libpcsxcore/cheat.o libpcsxcore/database.o libpcsxcore/debug.o \
 	libpcsxcore/decode_xa.o libpcsxcore/disr3000a.o libpcsxcore/mdec.o \
 	libpcsxcore/misc.o libpcsxcore/plugins.o libpcsxcore/ppf.o libpcsxcore/psxbios.o \
 	libpcsxcore/psxcommon.o libpcsxcore/psxcounters.o libpcsxcore/psxdma.o libpcsxcore/psxhle.o \
diff --git a/libpcsxcore/database.c b/libpcsxcore/database.c
new file mode 100644
index 00000000..f383e361
--- /dev/null
+++ b/libpcsxcore/database.c
@@ -0,0 +1,36 @@
+#include "misc.h"
+#include "../plugins/dfsound/spu_config.h"
+#include "sio.h"
+
+/* It's duplicated from emu_if.c */
+#define ARRAY_SIZE(x) (sizeof(x) / sizeof(x[0]))
+
+static const char MemorycardHack_db[8][10] =
+{
+	/* Lifeforce Tenka, also known as Codename Tenka */
+	{"SLES00613"},
+	{"SLED00690"},
+	{"SLES00614"},
+	{"SLES00615"},
+	{"SLES00616"},
+	{"SLES00617"},
+	{"SCUS94409"}
+};
+
+/* Function for automatic patching according to GameID. */
+void Apply_Hacks_Cdrom()
+{
+	uint32_t i;
+	
+	/* Apply Memory card hack for Codename Tenka. (The game needs one of the memory card slots to be empty) */
+	for(i=0;i<ARRAY_SIZE(MemorycardHack_db);i++)
+	{
+		if (strncmp(CdromId, MemorycardHack_db[i], 9) == 0)
+		{
+			/* Disable the second memory card slot for the game */
+			Config.Mcd2[0] = 0;
+			/* This also needs to be done because in sio.c, they don't use Config.Mcd2 for that purpose */
+			McdDisable[1] = 1;
+		}
+	}
+}
diff --git a/libpcsxcore/database.h b/libpcsxcore/database.h
new file mode 100644
index 00000000..fbb564dd
--- /dev/null
+++ b/libpcsxcore/database.h
@@ -0,0 +1,6 @@
+#ifndef DATABASE_H
+#define DATABASE_H
+
+extern void Apply_Hacks_Cdrom();
+
+#endif
diff --git a/libpcsxcore/misc.c b/libpcsxcore/misc.c
index 58170cf0..9b0b27fd 100644
--- a/libpcsxcore/misc.c
+++ b/libpcsxcore/misc.c
@@ -26,6 +26,7 @@
 #include "mdec.h"
 #include "gpu.h"
 #include "ppf.h"
+#include "database.h"
 #include <zlib.h>
 
 char CdromId[10] = "";
@@ -389,6 +390,8 @@ int CheckCdrom() {
 	SysPrintf(_("CD-ROM Label: %.32s\n"), CdromLabel);
 	SysPrintf(_("CD-ROM ID: %.9s\n"), CdromId);
 	SysPrintf(_("CD-ROM EXE Name: %.255s\n"), exename);
+	
+	Apply_Hacks_Cdrom();
 
 	BuildPPFCache();
 
diff --git a/libpcsxcore/sio.h b/libpcsxcore/sio.h
index eff1746a..a554c2bb 100644
--- a/libpcsxcore/sio.h
+++ b/libpcsxcore/sio.h
@@ -34,6 +34,7 @@ extern "C" {
 #define MCD_SIZE	(1024 * 8 * 16)
 
 extern char Mcd1Data[MCD_SIZE], Mcd2Data[MCD_SIZE];
+extern char McdDisable[2];
 
 void sioWrite8(unsigned char value);
 void sioWriteStat16(unsigned short value);
-- 
2.39.2