Add --joy CLI argument

Closes #15

Author: smokku

src/args.c

@@ -11,7 +11,9 @@ const char* app_releases_address = "https://github.com/X65/emu/releases";
 #define FULL_NAME "X65 microcomputer emulator"
 const char full_name[] = FULL_NAME;
 
-struct arguments arguments = { NULL, 0, 0, "-" };
+struct arguments arguments = {
+    NULL, 0, 0, "-", false, false, NULL,
+};
 static char args_doc[] = "[ROM.xex]";
 
 #ifdef USE_ARGP
@@ -21,6 +23,7 @@ static struct argp_option options[] = {
     { "silent", 's', 0, OPTION_ALIAS },
     { "output", 'o', "FILE", 0, "Output to FILE instead of standard output" },
     { "labels", 'l', "LABELS_FILE", 0, "Load VICE compatible global labels file" },
+    { "joy", 'j', 0, 0, "Enable Joystick 0 emulation" },
     { "dap", 'd', 0, 0, "Enable Debug Adapter Protocol over stdin/stdout" },
     { "dap-port", 'p', "PORT", 0, "Enable Debug Adapter Protocol over TCP port" },
     { 0 }
@@ -34,6 +37,7 @@ static error_t parse_opt(int key, char* arg, struct argp_state* argp_state) {
         case 's': args->silent = 1; break;
         case 'v': args->verbose = 1; break;
         case 'o': args->output_file = arg; break;
+        case 'j': args->joy = 1; break;
         case 'd': args->dap = 1; break;
         case 'p': args->dap_port = arg; break;
 

src/args.h

@@ -13,6 +13,7 @@ extern struct arguments {
     const char* rom;
     int silent, verbose;
     const char* output_file;
+    bool joy;
     bool dap;
     const char* dap_port;
 } arguments;

src/x65.c

@@ -148,7 +148,7 @@ void app_init(void) {
     saudio_setup(&(saudio_desc){
         .logger.func = slog_func,
     });
-    x65_joystick_type_t joy_type = X65_JOYSTICKTYPE_NONE;
+    x65_joystick_type_t joy_type = arguments.joy ? X65_JOYSTICKTYPE_DIGITAL_1 : X65_JOYSTICKTYPE_NONE;
     if (sargs_exists("joystick")) {
         if (sargs_equals("joystick", "digital_1")) {
             joy_type = X65_JOYSTICKTYPE_DIGITAL_1;
@@ -281,10 +281,11 @@ void app_init(void) {
     }
     if (sargs_exists("break")) {
         int opcode;
-        if (sscanf(sargs_value("break"),"%x",&opcode) == 1) {
-            ui_dbg_control_opcode_break(&state.ui.dbg,true,opcode);
-        } else {
-            fprintf(stderr,"Bad breakpoint opcode %s\n",sargs_value("break"));
+        if (sscanf(sargs_value("break"), "%x", &opcode) == 1) {
+            ui_dbg_control_opcode_break(&state.ui.dbg, true, opcode);
+        }
+        else {
+            fprintf(stderr, "Bad breakpoint opcode %s\n", sargs_value("break"));
         }
     }
 }