Add -c/--config option to specific alternate configuration file. Sorry Max, but it's damn useful for coverdiscs :)

svn-id: r12758

2 files changed, 28 insertions, 0 deletions

diff --git a/base/gameDetector.cpp b/base/gameDetector.cpp
index d6ccdb7af9..98f91a3796 100644
--- a/base/gameDetector.cpp
+++ b/base/gameDetector.cpp
@@ -48,6 +48,7 @@ static const char USAGE_STRING[] =
 	"  -z, --list-games         Display list of supported games and exit\n"
 	"  -t, --list-targets       Display list of configured targets and exit\n"
 	"\n"
+	"  -c, --config=CONFIG      Use alternate configuration file\n"
 	"  -p, --path=PATH          Path to where the game is installed\n"
 	"  -x, --save-slot[=NUM]    Save game slot to load (default: autosave)\n"
 	"  -f, --fullscreen         Force full-screen mode\n"
@@ -284,6 +285,10 @@ void GameDetector::parseCommandLine(int argc, char **argv) {
 			cmdValue = (shortCmdLower == s[1]);
 			s += 2;
 
+			DO_OPTION('c', "config")
+				// Dummy
+			END_OPTION
+
 			DO_OPTION('b', "boot-param")
 				ConfMan.set("boot_param", (int)strtol(option, 0, 10), kTransientDomain);
 			END_OPTION
diff --git a/base/main.cpp b/base/main.cpp
index 36409fe41e..bf33c75084 100644
--- a/base/main.cpp
+++ b/base/main.cpp
@@ -245,6 +245,7 @@ int main(int argc, char *argv[]) {
 extern "C" int scummvm_main(GameDetector &detector, int argc, char *argv[]) {
 #endif
 	OSystem::Property prop;
+	char *cfgFilename = NULL, *s=argv[1];
 
 #if defined(UNIX)
 	/* On Unix, do a quick endian / alignement check before starting */
@@ -286,6 +287,28 @@ extern "C" int scummvm_main(GameDetector &detector, int argc, char *argv[]) {
 
 #endif //defined(WIN32) && defined(USE_CONSOLE)
 
+
+	// Quick preparse of command-line, looking for alt configfile path
+	for (int i = argc - 1; i >= 1; i--) {
+		s = argv[i];
+		bool shortOpt = (s[0] == '-' && tolower(s[1]) == 'c');
+		bool longOpt  = (s[0] == '-' && s[1] == '-'  && s[2] == 'c' && s[3] == 'o' \
+				 && s[4] == 'n' && s[5] == 'f' && s[6] == 'i' && s[7] == 'g');
+
+		if (shortOpt || longOpt) {
+			if (longOpt) s+=9;
+			if (shortOpt) s+=2;
+
+			if (*s == '\0')
+				break;
+
+			cfgFilename = s;
+			break;
+		}
+	}
+	if (cfgFilename != NULL)
+		ConfMan.switchFile(cfgFilename);
+
 	// Update the config file
 	ConfMan.set("versioninfo", gScummVMVersion, Common::ConfigManager::kApplicationDomain);