From: Andrew Udvare <audvare@gmail.com>
Subject: [PATCH] Open the cheat file that was asked for

CheatCodes_Read() takes the name of the cheat file, marks it unused, and opens
a literal "cheat_file" in the working directory instead. Both callers pass
"Daedalus.cht", which is what the file is actually called and what ships with
the program, so the installed one was never read and an empty "cheat_file" was
created wherever the program happened to be started from.

--- a/Source/Interface/Cheats.cpp
+++ b/Source/Interface/Cheats.cpp
@@ -33,9 +33,11 @@
 
 #include "Ultra/ultra_R4300.h"
 
+#include "Utility/Paths.h"
 #include "Utility/StringUtil.h"
 #include "Utility/VolatileMem.h"
 #include <filesystem>
+#include <string>
 
 //
 // Cheatcode routines and format based from 1964
@@ -262,7 +264,7 @@
 //*****************************************************************************
 //
 //*****************************************************************************
-bool CheatCodes_Read(const char *rom_name, const char *file [[maybe_unused]], u8 countryID)
+bool CheatCodes_Read(const char *rom_name, const char *file, u8 countryID)
 {
 	char			current_rom_name[64];
 	static char		last_rom_name[128];
@@ -290,11 +292,17 @@
 	// Always clear when parsing a new ROM
 	CheatCodes_Clear();
 
-	stream = fopen("cheat_file", "rt");
+	// Both callers pass "Daedalus.cht", which is what the cheat file is
+	// actually called and what ships with the program. Opening a literal
+	// "cheat_file" in the working directory ignored the argument and left an
+	// empty file of that name wherever the program happened to be started.
+	const std::string cheat_path = setBasePath(file).string();
+
+	stream = fopen(cheat_path.c_str(), "rt");
 	if(stream == nullptr)
 	{
 		// File does not exist, try to create a new empty one
-		stream = fopen("cheat_file", "wt");
+		stream = fopen(cheat_path.c_str(), "wt");
 
 		if(stream == nullptr)
 		{