From 589ca41e27f178117e2311e811229e2ca430fecc Mon Sep 17 00:00:00 2001
From: Vladimir Serbinenko <phcoder@gmail.com>
Date: Thu, 26 Jan 2023 05:45:23 +0100
Subject: [PATCH] KOLIBRI: Add a launch wrapper

Exporting symbols from main binary is cumbersome on KolibriOS but importing
from another dll is fine. So we make scummvm core into a dll and add a thin
launcher for it.
---
 .../platform/sdl/kolibrios/wrapper-main.c     | 56 +++++++++++++++++++
 1 file changed, 56 insertions(+)
 create mode 100644 backends/platform/sdl/kolibrios/wrapper-main.c

diff --git a/backends/platform/sdl/kolibrios/wrapper-main.c b/backends/platform/sdl/kolibrios/wrapper-main.c
new file mode 100644
index 00000000000..ac5d05e96c3
--- /dev/null
+++ b/backends/platform/sdl/kolibrios/wrapper-main.c
@@ -0,0 +1,56 @@
+/* ScummVM - Graphic Adventure Engine
+ *
+ * ScummVM is the legal property of its developers, whose names
+ * are too numerous to list here. Please refer to the COPYRIGHT
+ * file distributed with this source distribution.
+ *
+ * This program is free software: you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation, either version 3 of the License, or
+ * (at your option) any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program.  If not, see <http://www.gnu.org/licenses/>.
+ *
+ */
+
+#include <kos32sys.h>
+#include <stdio.h>
+
+/* This is just a small wrapper so that the main scummvm is loaded as dll.  */
+int kolibrios_main(int argc, char *argv[]);
+
+int main(int argc, char *argv[]) {
+	printf("Loading SCUMMVM\n");
+	if (argc < 1 || strnlen(argv[0], 3005) > 3000) {
+		fprintf(stderr, "Couldn't determine exe path");
+		return 1;
+	}
+	const char *r = strrchr(argv[0], '/');
+	static char dllName[4000];
+	int p = 0;
+	if (r) {
+		p = r - argv[0] + 1;
+		memcpy(dllName, argv[0], p);
+	}
+	memcpy(dllName + p, "scummvm.dll", sizeof("scummvm.dll"));
+	
+	void *dlHandle = load_library(dllName);
+	if (!dlHandle) {
+		fprintf(stderr, "Couldn't load %s", dllName);
+		return 2;
+	}
+
+	void (*kolibrios_main) (int argc, char *argv[]) = get_proc_address(dlHandle, "kolibrios_main");
+	if (!kolibrios_main) {
+		fprintf(stderr, "Failed to located kolibrios_main");
+		return 3;
+	}
+
+	kolibrios_main(argc, argv);
+}