encode esc in instead_cmd

src/sdl-instead/instead.c

@@ -149,16 +149,15 @@ int instead_iretval(int n)
 
 char *instead_cmd(char *s)
 {
-	char buf[1024];
-	char *p = s;
-	while (*p) {
-		if (*p == '\\' || *p == '\'' || *p == '\"' || *p == '[' || *p == ']')
-			return NULL;
-		p ++;
-	}
-	s = togame(s);
-	snprintf(buf, sizeof(buf), "return iface:cmd('%s')", s);
-	free(s);
+	char buf[4096];
+	char *p;
+	p = encode_esc_string(s);
+	if (!p)
+		return NULL;
+	s = togame(p); free(p);
+	if (!s)
+		return NULL;	
+	snprintf(buf, sizeof(buf), "return iface:cmd('%s')", s); free(s);
 	p = getstring(buf);
 	return p;
 }

src/sdl-instead/util.c

@@ -154,6 +154,39 @@ int parse_string(const char *v, void *data)
 	return 0;	
 }
 
+char *encode_esc_string(const char *v)
+{
+	char *r, *p;
+	if (!v)
+		return NULL;
+	p = r = malloc((strlen(v)*2) + 1);
+	if (!r)
+		return NULL;
+	while (*v) {
+		switch (*v) {
+		case ' ':
+			*p ++ = '\\';
+			*p ++ = ' ';
+			break;
+		case '"':
+			*p ++ = '\\';
+			*p ++ = '"';
+			break;
+		case '\'':
+			*p ++ = '\\';
+			*p ++ = '\'';
+			break;
+		case '\\':
+			*p ++ = '\\';
+			*p ++ = '\\';
+		default:
+			*p ++ = *v;
+		}
+		v ++;
+	}
+	*p ++ = 0;
+	return r;
+}
 
 int parse_esc_string(const char *v, void *data)
 {

src/sdl-instead/util.h

@@ -21,6 +21,7 @@ extern int parse_esc_string(const char *v, void *data);
 extern int parse_string(const char *v, void *data);
 extern int parse_int(const char *v, void *data);
 extern int parse_full_path(const char *v, void *data);
+extern char *encode_esc_string(const char *v);
 
 #ifdef _HAVE_ICONV
 extern char *decode(iconv_t hiconv, const char *s);