From b467198f16c6bea39d30232e59833001ce512908 Mon Sep 17 00:00:00 2001
From: Alexander Batalov <alex.batalov@gmail.com>
Date: Thu, 26 May 2022 00:16:20 +0300
Subject: [PATCH] Introduce sfall config

---
 CMakeLists.txt      |  2 ++
 src/game.cc         |  7 +++++++
 src/game_config.cc  | 18 +---------------
 src/main.cc         | 15 +++++++++++++-
 src/sfall_config.cc | 50 +++++++++++++++++++++++++++++++++++++++++++++
 src/sfall_config.h  | 20 ++++++++++++++++++
 6 files changed, 94 insertions(+), 18 deletions(-)
 create mode 100644 src/sfall_config.cc
 create mode 100644 src/sfall_config.h

diff --git a/CMakeLists.txt b/CMakeLists.txt
index fc69879..e12f86f 100644
--- a/CMakeLists.txt
+++ b/CMakeLists.txt
@@ -229,6 +229,8 @@ add_executable(fallout2-ce WIN32
 target_sources(fallout2-ce PUBLIC
     "src/fps_limiter.cc"
     "src/fps_limiter.h"
+    "src/sfall_config.cc"
+    "src/sfall_config.h"
 )
 
 target_compile_definitions(fallout2-ce PUBLIC
diff --git a/src/game.cc b/src/game.cc
index 80a4cd4..5bd4563 100644
--- a/src/game.cc
+++ b/src/game.cc
@@ -43,6 +43,7 @@
 #include "queue.h"
 #include "random.h"
 #include "scripts.h"
+#include "sfall_config.h"
 #include "skill.h"
 #include "skilldex.h"
 #include "stat.h"
@@ -115,12 +116,17 @@ int gameInitWithOptions(const char* windowTitle, bool isMapper, int font, int a4
         return -1;
     }
 
+    // Sfall config should be initialized before game config, since it can
+    // override it's file name.
+    sfallConfigInit(argc, argv);
+
     gameConfigInit(isMapper, argc, argv);
 
     gIsMapper = isMapper;
 
     if (gameDbInit() == -1) {
         gameConfigExit(false);
+        sfallConfigExit();
         return -1;
     }
 
@@ -402,6 +408,7 @@ void gameExit()
     _windowClose();
     dbExit();
     gameConfigExit(true);
+    sfallConfigExit();
 }
 
 // 0x442D44
diff --git a/src/game_config.cc b/src/game_config.cc
index 349bb2d..be5041d 100644
--- a/src/game_config.cc
+++ b/src/game_config.cc
@@ -21,7 +21,7 @@ Config gGameConfig;
 // 0x58E978
 char gGameConfigFilePath[FILENAME_MAX];
 
-// Inits main game config and optionally Sfall config.
+// Inits main game config.
 //
 // [isMapper] is a flag indicating whether we're initing config for a main
 // game, or a mapper. This value is `false` for the game itself.
@@ -136,22 +136,6 @@ bool gameConfigInit(bool isMapper, int argc, char** argv)
     // whatever was loaded from `fallout2.cfg`.
     configParseCommandLineArguments(&gGameConfig, argc, argv);
 
-    // Optional Sfall extension
-    Config sfallConfig;
-    if (configInit(&sfallConfig)) {
-        configRead(&sfallConfig, "ddraw.ini", false);
-
-        configParseCommandLineArguments(&sfallConfig, argc, argv);
-
-        char* startingMap;
-        if (configGetString(&sfallConfig, "misc", "StartingMap", &startingMap)) {
-            if (*startingMap != '\0') {
-                strncpy(_mainMap, startingMap, 16);
-            }
-        }
-    }
-    configFree(&sfallConfig);
-
     gGameConfigInitialized = true;
 
     return true;
diff --git a/src/main.cc b/src/main.cc
index 6bbad81..8b0badf 100644
--- a/src/main.cc
+++ b/src/main.cc
@@ -22,6 +22,7 @@
 #include "palette.h"
 #include "random.h"
 #include "scripts.h"
+#include "sfall_config.h"
 #include "selfrun.h"
 #include "text_font.h"
 #include "version.h"
@@ -155,7 +156,19 @@ int falloutMain(int argc, char** argv)
                 if (characterSelectorOpen() == 2) {
                     gameMoviePlay(MOVIE_ELDER, GAME_MOVIE_STOP_MUSIC);
                     randomSeedPrerandom(-1);
-                    _main_load_new(_mainMap);
+
+                    // SFALL: Override starting map.                    
+                    char* mapName = NULL;
+                    if (configGetString(&gSfallConfig, SFALL_CONFIG_MISC_KEY, SFALL_CONFIG_STARTING_MAP_KEY, &mapName)) {
+                        if (*mapName == '\0') {
+                            mapName = NULL;
+                        }
+                    }
+
+                    char* mapNameCopy = strdup(mapName != NULL ? mapName : _mainMap);
+                    _main_load_new(mapNameCopy);
+                    free(mapNameCopy);
+
                     mainLoop(fpsLimiter);
                     paletteFadeTo(gPaletteWhite);
                     objectHide(gDude, NULL);
diff --git a/src/sfall_config.cc b/src/sfall_config.cc
new file mode 100644
index 0000000..fac4faa
--- /dev/null
+++ b/src/sfall_config.cc
@@ -0,0 +1,50 @@
+#include "sfall_config.h"
+
+#include <stdio.h>
+#include <string.h>
+
+#define SFALL_CONFIG_FILE_NAME "ddraw.ini"
+
+bool gSfallConfigInitialized = false;
+Config gSfallConfig;
+
+bool sfallConfigInit(int argc, char** argv)
+{
+    if (gSfallConfigInitialized) {
+        return false;
+    }
+
+    if (!configInit(&gSfallConfig)) {
+        return false;
+    }
+
+    // Initialize defaults.
+    configSetString(&gSfallConfig, SFALL_CONFIG_MISC_KEY, SFALL_CONFIG_STARTING_MAP_KEY, "");
+
+    char path[FILENAME_MAX];
+    char* executable = argv[0];
+    char* ch = strrchr(executable, '\\');
+    if (ch != NULL) {
+        *ch = '\0';
+        sprintf(path, "%s\\%s", executable, SFALL_CONFIG_FILE_NAME);
+        *ch = '\\';
+    } else {
+        strcpy(path, SFALL_CONFIG_FILE_NAME);
+    }
+
+    configRead(&gSfallConfig, path, false);
+
+    configParseCommandLineArguments(&gSfallConfig, argc, argv);
+
+    gSfallConfigInitialized = true;
+
+    return true;
+}
+
+void sfallConfigExit()
+{
+    if (gSfallConfigInitialized) {
+        configFree(&gSfallConfig);
+        gSfallConfigInitialized = false;
+    }
+}
diff --git a/src/sfall_config.h b/src/sfall_config.h
new file mode 100644
index 0000000..fe0b6d7
--- /dev/null
+++ b/src/sfall_config.h
@@ -0,0 +1,20 @@
+#ifndef SFALL_CONFIG_H
+#define SFALL_CONFIG_H
+
+#include "config.h"
+
+#include <stdbool.h>
+
+#define SFALL_CONFIG_FILE_NAME "ddraw.ini"
+
+#define SFALL_CONFIG_MISC_KEY "Misc"
+
+#define SFALL_CONFIG_STARTING_MAP_KEY "StartingMap"
+
+extern bool gSfallConfigInitialized;
+extern Config gSfallConfig;
+
+bool sfallConfigInit(int argc, char** argv);
+void sfallConfigExit();
+
+#endif /* SFALL_CONFIG_H */