Add a `--configfile` CLI option

Usage: `--configfile yahoo.ini` will load up a file named yahoo.ini as the configuration file.

src/game/options_menu.c

@@ -16,6 +16,7 @@
 #include "game/game_init.h"
 #include "game/ingame_menu.h"
 #include "game/options_menu.h"
+#include "pc/cliopts.h"
 #include "pc/configfile.h"
 #include "pc/controller/controller_api.h"
 
@@ -424,7 +425,7 @@ void optmenu_toggle(void) {
         newcam_init_settings(); // load bettercam settings from config vars
         #endif
         controller_reconfigure(); // rebind using new config values
-        configfile_save(CONFIG_FILE);
+        configfile_save(gCLIOpts.ConfigFile);
     }
 }
 

src/pc/cliopts.c

@@ -1,5 +1,6 @@
 #include "cliopts.h"
 #include <strings.h>
+#include <stdlib.h>
 
 struct PCCLIOptions gCLIOpts;
 
@@ -8,6 +9,8 @@ void parse_cli_opts(int argc, char* argv[])
 	// Initialize options with false values. 
 	gCLIOpts.SkipIntro  = 0;
     gCLIOpts.FullScreen = 0;
+    gCLIOpts.ConfigFile = malloc(31);
+    strncpy(gCLIOpts.ConfigFile, "sm64config.txt", strlen("sm64config.txt"));
 
 	// Scan arguments for options
 	if (argc > 1)
@@ -20,6 +23,19 @@ void parse_cli_opts(int argc, char* argv[])
 
             if (strcmp(argv[i], "--fullscreen") == 0) // Open game in fullscreen
                 gCLIOpts.FullScreen = 1;            
+
+            if (strncmp(argv[i], "--configfile", strlen("--configfile")) == 0)
+            {
+				if (i+1 < argc)
+				{
+					if (strlen(argv[i]) > 30) {
+						fprintf(stderr, "Configuration file supplied has a name too long.\n");
+					} else {
+						memset(gCLIOpts.ConfigFile, 0, 30);
+						strncpy(gCLIOpts.ConfigFile, argv[i+1], strlen(argv[i+1]));
+					}
+				}
+			}	
 		}
 	}
 }

src/pc/configfile.h

@@ -3,8 +3,6 @@
 
 #include <stdbool.h>
 
-#define CONFIG_FILE "sm64config.txt"
-
 #define MAX_BINDS    3
 #define MAX_VOLUME   127
 #define VOLUME_SHIFT 7

src/pc/pc_main.c

@@ -92,7 +92,7 @@ void audio_shutdown(void) {
 }
 
 void game_shutdown(void) {
-    configfile_save(CONFIG_FILE);
+    configfile_save(gCLIOpts.ConfigFile);;
     controller_shutdown();
     audio_shutdown();
     gfx_shutdown();
@@ -136,7 +136,7 @@ void main_func(void) {
     main_pool_init(pool, pool + sizeof(pool) / sizeof(pool[0]));
     gEffectsMemoryPool = mem_pool_init(0x4000, MEMORY_POOL_LEFT);
 
-    configfile_load(CONFIG_FILE);
+    configfile_load(gCLIOpts.ConfigFile);
     atexit(game_shutdown);
 
 #ifdef TARGET_WEB