Add VFS v3 implementation

pkg/worker/caged/libretro/nanoarch/nanoarch.c

@@ -3,6 +3,7 @@
 #include <stdbool.h>
 #include <stdarg.h>
 #include <stdio.h>
+#include <stdlib.h>
 
 int initialized = 0;
 
@@ -185,6 +186,31 @@ void deinit_video_cgo() {
     deinitVideo();
 }
 
+static const char* vfsGetPath_cgo(struct retro_vfs_file_handle *stream) {
+    const char* vfsGetPath(struct retro_vfs_file_handle *stream);
+    return vfsGetPath(stream);
+}
+
+static struct retro_vfs_dir_handle* vfsOpenDir_cgo(const char *dir, bool include_hidden) {
+    struct retro_vfs_dir_handle* vfsOpenDir(const char *dir, bool include_hidden);
+    return vfsOpenDir(dir, include_hidden);
+}
+
+char test[] = "TEST!";
+
+struct retro_vfs_interface* vfs_interface_cgo() {
+    struct retro_vfs_interface *vfs_i = malloc(sizeof (struct retro_vfs_interface));
+    if (vfs_i == NULL)
+        return NULL;
+
+    vfs_i->get_path = &vfsGetPath_cgo;
+    vfs_i->opendir = &vfsOpenDir_cgo;
+
+    vfs_i->opendir((const char*)(&test), false);
+
+    return vfs_i;
+}
+
 typedef struct {
    pthread_mutex_t m;
    pthread_cond_t cond;

pkg/worker/caged/libretro/nanoarch/nanoarch.go

@@ -59,6 +59,7 @@ type Nanoarch struct {
 	cSaveDirectory   *C.char
 	cSystemDirectory *C.char
 	cUserName        *C.char
+	cVfsInterface    *C.struct_retro_vfs_interface
 	Video            struct {
 		gl struct {
 			enabled bool
@@ -374,6 +375,11 @@ func (n *Nanoarch) Shutdown() {
 	C.free(unsafe.Pointer(n.cUserName))
 	C.free(unsafe.Pointer(n.cSaveDirectory))
 	C.free(unsafe.Pointer(n.cSystemDirectory))
+	if n.cVfsInterface != nil {
+		n.log.Info().Msgf(">>>>>>>>> freeeing vfs interface heappp")
+		C.free(unsafe.Pointer(n.cVfsInterface))
+		n.cVfsInterface = nil
+	}
 }
 
 func (n *Nanoarch) Run() {
@@ -794,6 +800,16 @@ func coreEnvironment(cmd C.unsigned, data unsafe.Pointer) C.bool {
 	case C.RETRO_ENVIRONMENT_GET_SAVE_DIRECTORY:
 		*(**C.char)(data) = Nan0.cSaveDirectory
 		return true
+	case C.RETRO_ENVIRONMENT_GET_VFS_INTERFACE:
+		vfs := (*C.struct_retro_vfs_interface_info)(data)
+		minVer := vfs.required_interface_version
+		Nan0.log.Info().Msgf("[vfs] required version: %v", minVer)
+		if Nan0.cVfsInterface != nil {
+			Nan0.log.Info().Msgf("[vfs] freeing old interface >>> %+v", *Nan0.cVfsInterface)
+			C.free(unsafe.Pointer(Nan0.cVfsInterface))
+		}
+		Nan0.cVfsInterface = C.vfs_interface_cgo()
+		return true
 	case C.RETRO_ENVIRONMENT_SET_MESSAGE:
 		// only with the Libretro debug mode
 		if Nan0.log.GetLevel() < logger.InfoLevel {
@@ -940,6 +956,17 @@ func deinitVideo() {
 	thread.SwitchGraphics(false)
 }
 
+//export vfsGetPath
+func vfsGetPath(stream *C.struct_retro_vfs_file_handle) *C.char {
+	return nil
+}
+
+//export vfsOpenDir
+func vfsOpenDir(dir *C.char, includeHidden C.bool) unsafe.Pointer {
+	Nan0.log.Info().Msgf(">>>>> Read: %v", C.GoString(dir))
+	return nil
+}
+
 type limit struct {
 	d  time.Duration
 	t  *time.Timer

pkg/worker/caged/libretro/nanoarch/nanoarch.h

@@ -37,6 +37,8 @@ void core_video_refresh_cgo(void *data, unsigned width, unsigned height, size_t
 void init_video_cgo();
 void deinit_video_cgo();
 
+struct retro_vfs_interface* vfs_interface_cgo();
+
 void same_thread(void *f);
 void *same_thread_with_args2(void *f, int type, void *arg1, void *arg2);
 void same_thread_stop();