Adds a standalone multi-emulator mode

When starting without arguments, can select a core in the current
directory and some content (a game). Allows loading a different game
from the in-game menu.

1 files changed, 53 insertions, 0 deletions

diff --git a/util.c b/util.c
index ccc8c19..d07899f 100644
--- a/util.c
+++ b/util.c
@@ -1,5 +1,58 @@
+#include <stdlib.h>
+#include <string.h>
 #include "util.h"
 
+struct string_list *string_split(const char *string, char delim) {
+	const char *loc = string;
+	int size = 2; /* rest of string, NULL terminator */
+	int index = 0;
+	char delims[2] = {0};
+	char *saveptr = NULL;
+	struct string_list *list = calloc(1, sizeof(struct string_list));
+
+	if (!list)
+		goto finish;
+
+	list->source = strdup(string);
+	if (!list->source)
+		goto finish;
+
+	while((loc = strchr(loc, delim))) {
+		size++;
+		while (*loc && *loc == delim) loc++;
+	}
+
+	list->list = calloc(size, sizeof(char *));
+	if (!list->list)
+		goto finish;
+
+	delims[0] = delim;
+
+	while((loc = strtok_r(index == 0 ? list->source : NULL, delims, &saveptr))) {
+		list->list[index++] = loc;
+		if (index >= size)
+			break;
+	}
+
+finish:
+	return list;
+}
+
+void string_list_free(struct string_list *list) {
+	if (list) {
+		if (list->list) {
+			free(list->list);
+			list->list = NULL;
+		}
+		if (list->source) {
+			free(list->source);
+			list->source = NULL;
+		}
+
+		free(list);
+	}
+}
+
 void string_truncate(char *string, size_t max_len) {
 	size_t len = strlen(string) + 1;
 	if (len <= max_len) return;