os2: better copy_directory, and add native copy_file and copy_directory variants on MacOS

core/sys/darwin/copyfile.odin

@@ -0,0 +1,67 @@
+package darwin
+
+import "core:sys/posix"
+
+copyfile_state_t :: distinct rawptr
+
+copyfile_flags :: bit_set[enum {
+	ACL,
+	STAT,
+	XATTR,
+	DATA,
+
+	RECURSIVE = 15,
+
+	CHECK,
+	EXCL,
+	NOFOLLOW_SRC,
+	NOFOLLOW_DST,
+	MOVE,
+	UNLINK,
+	PACK,
+	UNPACK,
+
+	CLONE,
+	CLONE_FORCE,
+	RUN_IN_PLACE,
+	DATA_SPARSE,
+	PRESERVE_DST_TRACKED,
+	VERBOSE = 30,
+}; u32]
+
+COPYFILE_SECURITY :: copyfile_flags{.STAT, .ACL}
+COPYFILE_METADATA :: COPYFILE_SECURITY + copyfile_flags{.XATTR}
+COPYFILE_ALL      :: COPYFILE_METADATA + copyfile_flags{.DATA}
+
+COPYFILE_NOFOLLOW :: copyfile_flags{.NOFOLLOW_SRC, .NOFOLLOW_DST}
+
+copyfile_state_flag :: enum u32 {
+	SRC_FD = 1,
+	SRC_FILENAME,
+	DST_FD,
+	DST_FILENAME,
+	QUARANTINE,
+	STATUS_CB,
+	STATUS_CTX,
+	COPIED,
+	XATTRNAME,
+	WAS_CLONED,
+	SRC_BSIZE,
+	DST_BSIZE,
+	BSIZE,
+	FORBID_CROSS_MOUNT,
+	NOCPROTECT,
+	PRESERVE_SUID,
+	RECURSIVE_SRC_FTSENT,
+	FORBID_DST_EXISTING_SYMLINKS,
+}
+
+foreign system {
+	copyfile  :: proc(from, to: cstring,  state: copyfile_state_t, flags: copyfile_flags) -> i32 ---
+	fcopyfile :: proc(from, to: posix.FD, state: copyfile_state_t, flags: copyfile_flags) -> i32 ---
+
+	copyfile_state_alloc :: proc() -> copyfile_state_t ---
+	copyfile_state_free  :: proc(state: copyfile_state_t) -> posix.result ---
+	copyfile_state_get   :: proc(state: copyfile_state_t, flag: copyfile_state_flag, dst: rawptr) -> posix.result ---
+	copyfile_state_set   :: proc(state: copyfile_state_t, flag: copyfile_state_flag, src: rawptr) -> posix.result ---
+}