INI: add DEBUG option to disable logging to console.

MiSTer.ini

@@ -1,4 +1,5 @@
 [MiSTer]
+;debug=0               ; set to 0 to disable debugging messages. Default is 1.
 key_menu_as_rgui=0     ; set to 1 to make the MENU key map to RGUI in Minimig (e.g. for Right Amiga)
 forced_scandoubler=0   ; set to 1 to run scandoubler on VGA output always (depends on core).
 ;ypbpr=0               ; set to 1 for YPbPr on VGA output. (obsolete. see vga_mode)

cfg.cpp

@@ -16,6 +16,8 @@
 #include "support/arcade/mra_loader.h"
 
 cfg_t cfg;
+static FILE *orig_stdout = NULL;
+static FILE *dev_null = NULL;
 
 typedef enum
 {
@@ -127,6 +129,7 @@ static const ini_var_t ini_vars[] =
 	{ "CONTROLLER_UNIQUE_MAPPING", (void *)(cfg.controller_unique_mapping), UINT32ARR, 0, 0xFFFFFFFF },
 	{ "OSD_LOCK", (void*)(&(cfg.osd_lock)), STRING, 0, sizeof(cfg.osd_lock) - 1 },
 	{ "OSD_LOCK_TIME", (void*)(&(cfg.osd_lock_time)), UINT16, 0, 60 },
+	{ "DEBUG", (void *)(&(cfg.debug)), UINT8, 0, 1 },
 };
 
 static const int nvars = (int)(sizeof(ini_vars) / sizeof(ini_var_t));
@@ -390,6 +393,10 @@ static void ini_parse_var(char* buf)
 
 		default:
 			ini_parse_numeric(var, &buf[i], var->var);
+			if (!strcasecmp(var->name, "DEBUG"))
+			{
+				stdout = cfg.debug ? orig_stdout : dev_null;
+			}
 			break;
 		}
 	}
@@ -401,6 +408,9 @@ static void ini_parse(int alt, const char *vmode)
 	int section = 0;
 	int eof;
 
+	if (!orig_stdout) orig_stdout = stdout;
+	if(!dev_null) dev_null = fopen("/dev/null", "w");
+
 	ini_parser_debugf("Start INI parser for core \"%s\"(%s), video mode \"%s\".", user_io_get_core_name(0), user_io_get_core_name(1), vmode);
 
 	memset(line, 0, sizeof(line));

cfg.h

@@ -97,6 +97,7 @@ typedef struct {
 	uint32_t controller_unique_mapping[256];
 	char osd_lock[25];
 	uint16_t osd_lock_time;
+	char debug;
 } cfg_t;
 
 extern cfg_t cfg;