From d945987cdac264f10e4b3cb5b24e1e663fbe533f Mon Sep 17 00:00:00 2001
From: Andreas Fankhauser hiddenalpha.ch
Date: Mon, 1 Dec 2025 20:23:02 +0100
Subject: Kludge-around with 'FileSystem' impl. Quite useless so far.

---
 include/qntan/Qntan.h | 61 +++++++++++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 61 insertions(+)

(limited to 'include/qntan')

diff --git a/include/qntan/Qntan.h b/include/qntan/Qntan.h
index 6f5a7fa..0b8a4c9 100644
--- a/include/qntan/Qntan.h
+++ b/include/qntan/Qntan.h
@@ -57,6 +57,7 @@ struct Qntan_Executor;
 struct Qntan_Scheduler;
 struct Qntan_IoMux;
 struct Qntan_File;
+struct Qntan_FileSystem;
 struct Qntan_FourierTransform;
 struct Qntan_Process;
 struct Qntan_HshTbl;
@@ -431,6 +432,7 @@ struct Qntan_File {
 	void (*truncate)( struct Qntan_File**, int64_t size,
 		void(*onDone)(int,Qntan_Cls), Qntan_Cls );
 	/* TODO doc
+	 * TODO There's a duplicate in 'FileSystem' of this function.
 	 * WARN: size MUST be zero. Any other value is UB! (aka reserved for
 	 *       future specifications)
 	 */
@@ -445,6 +447,65 @@ struct Qntan_File {
 
 
 
+struct Qntan_FileSystem {
+	/* VFS (VirtualFileSystem)
+	 * WARN: Heavily experimental API!
+	 * TODO: Review/fix/adjust/tune function signatures.
+	 */
+//	void (*getattr)( struct Qntan_FileSystem**, const char*path,
+//		void(*onDone)(int, struct stat*buf, Qntan_Cls), Qntan_Cls);
+//	/* Get detail information of a file/dir.
+//	 * 'buf' is only valid until return from 'onDone'.
+//	 */
+//	void (*mkdir)( struct Qntan_FileSystem**, char const*path, mode_t,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls );
+//	/**/
+//	void (*rmdir)( struct Qntan_FileSystem**, const char*path,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls );
+//	/**/
+//	void (*open)( struct Qntan_FileSystem**, const char*path,
+//		struct fuse_file_info*, void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*create)( struct Qntan_FileSystem**, const char*path, mode_t mode,
+//		struct fuse_file_info*, void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*unlink)( struct Qntan_FileSystem**, const char*path,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*truncate)( struct Qntan_FileSystem**, char const*path, off_t size,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/* TODO There's a duplicate in 'File' of this function.
+//	 */
+//	void (*rename)( struct Qntan_FileSystem**, char const*from, char const*to,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*chmod)( struct Qntan_FileSystem**, char const*path, mode_t,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*chown)( struct Qntan_FileSystem**, char const*path, uid_t, gid_t,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	void (*utimens)( struct Qntan_FileSystem**, char const*path, const struct timespec,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls );
+//	/**/
+//	void (*release)( struct Qntan_FileSystem**, char const*path, struct fuse_file_info*,
+//		void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+//	/* TODO what about 'close()' ? */
+//	void (*fsync)( struct Qntan_FileSystem**, char const*path, int isdatasync,
+//		struct fuse_file_info*, void(*onDone)(int, Qntan_Cls), Qntan_Cls);
+//	/**/
+};
+
+
+
+
+
+
+
+
+
+
 #ifndef Qntan_FourierTransform_transform
 #	define Qntan_FourierTransform_transform(A, ...) (*A)->transform(A, __VA_ARGS__)
 #endif
-- 
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